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* [Bug ada/83027] Hang when attaching a SIGINT handler
[not found] <bug-83027-4@http.gcc.gnu.org/bugzilla/>
@ 2017-11-17 15:01 ` porton at narod dot ru
0 siblings, 0 replies; only message in thread
From: porton at narod dot ru @ 2017-11-17 15:01 UTC (permalink / raw)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83027
--- Comment #6 from Victor Porton <porton at narod dot ru> ---
I found that the presence of the bug depends on presense `-lahven` in the
linker command.
Adding -lahven leads to the bug, removing it removes the bug.
Weird?
>From gcc-bugs-return-582039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 15:04:47 2017
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Subject: [Bug rtl-optimization/82621] [6/7/8 Regression] wrong code with -Og -fgcse -fweb
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--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed on trunk, backports pending.
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From: "porton at narod dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
Date: Fri, 17 Nov 2017 15:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83027
--- Comment #7 from Victor Porton <porton at narod dot ru> ---
There is an easier way to reprise the bug:
Copy all source files into a directory and run:
gnatmake simple_test -largs -lahven
./simple_test
To reprise the bug, you need Ahven installed.
I will attach source files in gnatchop format.
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From: "porton at narod dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
Date: Fri, 17 Nov 2017 15:09:00 -0000
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--- Comment #8 from Victor Porton <porton at narod dot ru> ---
Created attachment 42634
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42634&action=edit
Sources in gnatchop format
Run
gnatchop all.chop to extract the sources.
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From: "antoshkka at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/83032] New: Copy elision for returning subobject
Date: Fri, 17 Nov 2017 15:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83032
Bug ID: 83032
Summary: Copy elision for returning subobject
Product: gcc
Version: 8.0
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Priority: P3
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Following code
struct trace {
trace(trace const &) noexcept;
~trace();
};
struct ts { trace a, b; };
ts foo();
trace testing() {
return foo().a;
}
Compiles into assembly that calls copy constructor and destructors for `trace`
objects returned from `foo()`.
This could be optimized: return from `foo()` already puts `a` into a correct
place for return from `testing()`. So all we need is no call destructor for
`b`.
Optimal assembly should look close to the following:
testing():
push rbx
mov rbx, rdi
sub rsp, 16
call foo()
lea rdi, [rsp+15]
call trace::~trace()
add rsp, 16
mov rax, rbx
pop rbx
ret
Current suboptimal assembly looks like:
testing():
push rbx
mov rbx, rdi
sub rsp, 16
lea rdi, [rsp+14]
call foo()
lea rsi, [rsp+14]
mov rdi, rbx
call trace::trace(trace const&) <== Avoid this
lea rdi, [rsp+15]
call trace::~trace()
lea rdi, [rsp+14]
call trace::~trace() <== Avoid this
add rsp, 16
mov rax, rbx
pop rbx
ret
This optimization is very useful for C++ code, where returning std::pair,
std::tuple, std::variant or std::optional is a common practice. For example
following code could use copy elision for std::string inside std::optional:
std::optional<std::string> foo();
std::string testing() {
return *foo(); // No copy/move constructor call
}
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=82977
--- Comment #19 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Christophe Lyon from comment #18)
Those are most likely due to pr82977 that Jakub fixed just yesterday. If the
problems persist please open a new bug (running the test through valgrind might
help pinpoint the root cause).
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Subject: [Bug target/82641] Unable to enable crc32 for a certain function with target attribute on ARM (aarch32)
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--- Comment #10 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Author: tnfchris
Date: Fri Nov 17 15:53:51 2017
New Revision: 254878
URL: https://gcc.gnu.org/viewcvs?rev=254878&root=gcc&view=rev
Log:
2017-11-17 Tamar Christina <tamar.christina@arm.com>
PR target/82641
* config/arm/arm.c (arm_valid_target_attribute_rec):
Parse "arch=" and "+<ext>".
(arm_valid_target_attribute_tree): Re-init global options.
(arm_option_override): Make non-static.
(arm_options_perform_arch_sanity_checks): Make errors fatal.
* gcc/config/arm/arm-c.c (__ARM_FEATURE_CMSE): Support undef.
(__ARM_FEATURE_CRC32): Support undef.
* config/arm/arm_acle.h (__ARM_FEATURE_CRC32): Replace with pragma.
* doc/extend.texi (ARM Function Attributes): Add pragma and target.
gcc/testsuite/
2017-11-17 Tamar Christina <tamar.christina@arm.com>
PR target/82641
* gcc.target/arm/pragma_arch_attribute.c: New.
Added:
trunk/gcc/testsuite/gcc.target/arm/pragma_arch_attribute.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/arm.c
trunk/gcc/config/arm/arm_acle.h
trunk/gcc/doc/extend.texi
trunk/gcc/testsuite/ChangeLog
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
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Subject: [Bug c++/60068] missing diagnostic on array with negative bounds in template
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |8.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
No change in GCC 8.0.
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Subject: [Bug fortran/83021] [7 Regression] gfortran segfault
Date: Fri, 17 Nov 2017 16:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83021
Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |jvdelisle at gcc dot gnu.org
--- Comment #4 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #3)
> > > Could you please provide the file(s) needed to generate local_field_module.mod?
> >
> > I suspect the source code in question is the same as ...
>
> This file is not enough to generate local_field_module.mod.
>
> You have to provide a self contained reproducer otherwise the PR will be
> closed as INVALID.
I have confirmed it. I will do a regression hunt in the next day or two.
Getting a reduced test case will be a little tricky.
>From gcc-bugs-return-582048-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 17:03:51 2017
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From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
Date: Fri, 17 Nov 2017 17:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83027
--- Comment #9 from simon at pushface dot org ---
Seems to me your problem is with the Ahven library rather than with GCC, so the
person to investigate it should be the Ahven maintainer.
>From gcc-bugs-return-582049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 17:53:36 2017
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83033] New: aarch64/cortex-a57-fma-steering.c: 3 * poor C++ style ?
Date: Fri, 17 Nov 2017 17:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83033
Bug ID: 83033
Summary: aarch64/cortex-a57-fma-steering.c: 3 * poor C++ style
?
Product: gcc
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1.
aarch64/cortex-a57-fma-steering.c:133]: (style) class 'fma_node' does not have
a copy constructor which is recommended since the class contains a pointer to
allocated memory.
2.
aarch64/cortex-a57-fma-steering.c:189]: (style) class 'func_fma_steering' does
not have a copy constructor which is recommended since the class contains a
pointer to allocated memory.
3.
aarch64/cortex-a57-fma-steering.c:99]: (style) class 'fma_forest' does not have
a copy constructor which is recommended since the class contains a pointer to
allocated memory.
Poor C++ style to have ctor, dtor but no copy-ctor. If objects
of the class aren't supposed to be copied, then suggest put the
copy-ctor in the private section.
>From gcc-bugs-return-582050-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 18:14:30 2017
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Subject: [Bug libstdc++/66689] comp_ellint_3 and ellint_3 return garbage values
Date: Fri, 17 Nov 2017 18:14:00 -0000
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--- Comment #6 from Ed Smith-Rowland <3dw4rd at verizon dot net> ---
Created attachment 42635
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42635&action=edit
Patch with regenerated testcases for all. tr1 and std.
2017-11-17 Edward Smith-Rowland <3dw4rd@verizon.net>
PR libstdc++/pr66689 - comp_ellint_3 and ellint_3 return garbage values
* include/tr1/ell_integral.tcc: Correct the nu sign convention
in ellint_3 and comp_ellint_3.
* testsuite/tr1/5_numerical_facilities/special_functions/
06_comp_ellint_3/check_value.cc: Regen with correct values.
* testsuite/tr1/5_numerical_facilities/special_functions/
14_ellint_3/check_value.cc: Ditto.
* testsuite/special_functions/06_comp_ellint_3/check_value.cc: Ditto.
* testsuite/special_functions/13_ellint_3/check_value.cc: Ditto.
* testsuite/tr1/5_numerical_facilities/special_functions/
01_assoc_laguerre/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
02_assoc_legendre/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
03_beta/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
04_comp_ellint_1/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
05_comp_ellint_2/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
07_conf_hyperg/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
08_cyl_bessel_i/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
09_cyl_bessel_j/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
10_cyl_bessel_k/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
11_cyl_neumann/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
12_ellint_1/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
13_ellint_2/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
15_expint/check_value_neg.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
16_hermite/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
17_hyperg/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
18_laguerre/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
19_legendre/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
20_riemann_zeta/check_value_neg.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
21_sph_bessel/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
22_sph_legendre/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
23_sph_neumann/check_value.cc: Regen.
* testsuite/ext/special_functions/conf_hyperg/check_value.cc: Regen.
* testsuite/ext/special_functions/hyperg/check_value.cc: Regen.
* testsuite/special_functions/01_assoc_laguerre/check_value.cc: Regen.
* testsuite/special_functions/02_assoc_legendre/check_value.cc: Regen.
* testsuite/special_functions/03_beta/check_value.cc: Regen.
* testsuite/special_functions/04_comp_ellint_1/check_value.cc: Regen.
* testsuite/special_functions/05_comp_ellint_2/check_value.cc: Regen.
* testsuite/special_functions/07_cyl_bessel_i/check_value.cc: Regen.
* testsuite/special_functions/08_cyl_bessel_j/check_value.cc: Regen.
* testsuite/special_functions/09_cyl_bessel_k/check_value.cc: Regen.
* testsuite/special_functions/10_cyl_neumann/check_value.cc: Regen.
* testsuite/special_functions/11_ellint_1/check_value.cc: Regen.
* testsuite/special_functions/12_ellint_2/check_value.cc: Regen.
* testsuite/special_functions/14_expint/check_value.cc: Regen.
* testsuite/special_functions/15_hermite/check_value.cc: Regen.
* testsuite/special_functions/16_laguerre/check_value.cc: Regen.
* testsuite/special_functions/17_legendre/check_value.cc: Regen.
* testsuite/special_functions/18_riemann_zeta/check_value.cc: Regen.
* testsuite/special_functions/19_sph_bessel/check_value.cc: Regen.
* testsuite/special_functions/20_sph_legendre/check_value.cc: Regen.
* testsuite/special_functions/21_sph_neumann/check_value.cc: Regen.
* testsuite/tr1/5_numerical_facilities/special_functions/
06_comp_ellint_3/pr66689.cc: New.
* testsuite/tr1/5_numerical_facilities/special_functions/
14_ellint_3/pr66689.cc: New.
* testsuite/special_functions/06_comp_ellint_3/pr66689.cc: New.
* testsuite/special_functions/13_ellint_3/pr66689.cc: New.
>From gcc-bugs-return-582051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 18:39:16 2017
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From: "bunk at stusta dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83021] [7 Regression] gfortran segfault
Date: Fri, 17 Nov 2017 18:39:00 -0000
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Adrian Bunk <bunk at stusta dot de> changed:
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CC| |bunk at stusta dot de
--- Comment #5 from Adrian Bunk <bunk at stusta dot de> ---
Created attachment 42636
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42636&action=edit
Correct testcase
Sorry, I missed that one of the files was binary. Correct testcase is now
attached.
$ gfortran local_field.f90 global_field.f90 -fcoarray=lib
global_field.f90:126:0:
lhs%values(:) = rhs%state()
internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
$
>From gcc-bugs-return-582052-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 18:39:35 2017
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From: "porton at narod dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
Date: Fri, 17 Nov 2017 18:39:00 -0000
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--- Comment #10 from Victor Porton <porton at narod dot ru> ---
I notified the Ahven author.
However, the bug is quite weird: Isn't linking with a library just no-op if no
functions from the library are called? I wonder how the bug may depend on
linking with it. So I feel it is a GCC bug.
I also did a quick search in Ahven sources about interrupts and signals and
found nothing. So how can it be an Ahven bug?
>From gcc-bugs-return-582053-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 18:43:45 2017
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Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
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--- Comment #11 from Victor Porton <porton at narod dot ru> ---
Debian libahven27 package version 2.6-1.2.
>From gcc-bugs-return-582054-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 18:51:44 2017
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Subject: [Bug c/83034] New: ice in mem_loc_descriptor, at dwarf2out.c :15669
Date: Fri, 17 Nov 2017 18:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83034
Bug ID: 83034
Summary: ice in mem_loc_descriptor, at dwarf2out.c :15669
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
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For the following C code:
float *a;
b;
__attribute__((__simd__)) float expf(float);
c() {
for (; b; b++) {
float c = expf(b);
a[b] = c;
}
}
recent gcc trunk and flags -funroll-loops -ffast-math -O3 -g does this:
(vec_series:V4SI (reg:SI 6 bp [orig:95 tmp.13 ] [95])
(const_int 1 [0x1]))during RTL pass: final
bug394-min.c: In function ‘c’:
bug394-min.c:9:1: internal compiler error: in mem_loc_descriptor, at
dwarf2out.c
:15669
}
^
0x943449 mem_loc_descriptor(rtx_def*, machine_mode, machine_mode,
var_init_statu
s)
../../trunk/gcc/dwarf2out.c:15669
The problem seems to exist between revisions 254255 and 254315.
>From gcc-bugs-return-582055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 19:30:46 2017
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Subject: [Bug fortran/82923] Automatic allocation of deferred length character using function result
Date: Fri, 17 Nov 2017 19:30:00 -0000
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 42637
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42637&action=edit
Fix for the bug
This one does the job and it regtests OK. However, I'll wait until I get
PR78990 out of the way before submitting.
Paul
>From gcc-bugs-return-582056-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 19:33:04 2017
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Subject: [Bug fortran/82814] ICE from submodule character function
Date: Fri, 17 Nov 2017 19:33:00 -0000
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 42638
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42638&action=edit
Fix for the bug
This fixes the bug. However, I will wait until PR78990 is out of the way before
submitting
Cheers
Paul
>From gcc-bugs-return-582057-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 19:49:46 2017
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Subject: [Bug c++/83035] New: Using decltype fails with an operator using non-ADL lookup
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Bug ID: 83035
Summary: Using decltype fails with an operator using non-ADL
lookup
Product: gcc
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Created attachment 42639
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42639&action=edit
preprocessed source file
The following code generates an incorrect compiler error using GCC 7.2.0:
#include <utility>
namespace N
{
struct A {};
struct B {};
}
namespace operators
{
bool operator|(N::A, N::B) { return true; };
}
namespace details
{
using namespace operators;
template<typename T, typename U>
using UnionResultType = decltype(std::declval<T>() | std::declval<U>());
}
int main()
{
using UnionAB = details::UnionResultType<N::A, N::B>;
return 0;
}
(see: https://godbolt.org/g/2rfkh5)
'g++ -std=c++17 -save-temps main.cpp' reports:
main.cpp: In substitution of ‘template<class T, class U> using UnionResultType
= decltype ((declval<T>() | declval<U>())) [with T = N::A; U = N::B]’:
main.cpp:24:54: required from here
main.cpp:19:54: error: no match for ‘operator|’ (operand types are ‘N::A’ and
‘N::B’)
using UnionResultType = decltype(std::declval<T>() | std::declval<U>());
The operator is in scope, so this should not be an issue. Writing instead:
template<typename T, typename U>
using UnionResultType = decltype(operator|(std::declval<T>(),
std::declval<U>()));
does compile. See also:
https://stackoverflow.com/questions/47356994/using-decltype-with-an-operator-using-non-adl-lookup.
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Subject: [Bug libstdc++/82366] std::regex constructor called from shared library throws std::bad_cast
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spamdrop at fodvo dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|7.1.0 |7.2.0
--- Comment #6 from spamdrop at fodvo dot org ---
I downloaded gcc 7.2.0 and built using the same process. Without the ABI flag,
it too throws the bad_cast exception.
I may download older versions to test.
Question, is there anything more I can provide to help diagnose this problem?
I can get full coredumps and can jump to any level. The where stack trace is
below.
(gdb) where
#0 0x00007f9544086495 in raise () from /lib64/libc.so.6
#1 0x00007f9544087c75 in abort () from /lib64/libc.so.6
#2 0x00007f954a97579d in __gnu_cxx::__verbose_terminate_handler() () from
/dvl/odb/apps/dev/dal/ogg_12.3/libicuuc.so.56
#3 0x00007f954a974e66 in __cxxabiv1::__terminate(void (*)()) () from
/dvl/odb/apps/dev/dal/ogg_12.3/libicuuc.so.56
#4 0x00007f954a974eb1 in std::terminate() () from
/dvl/odb/apps/dev/dal/ogg_12.3/libicuuc.so.56
#5 0x00007f954a974fb8 in __cxa_throw () from
/dvl/odb/apps/dev/dal/ogg_12.3/libicuuc.so.56
#6 0x00007f954d6e55f2 in std::__throw_bad_cast() () from
/dvl/odb/apps/dev/dal/ogg_12.3/libgglog.so
#7 0x00007f9543b89487 in std::use_facet<std::__cxx11::collate<char> >
(__loc=...)
at
/dvl/odb5/build/gcc-7.2/gcc-7.2.0.obj/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/locale_classes.tcc:137
#8 0x00007f95414321bf in std::__cxx11::regex_traits<char>::transform<char*>
(this=0x246cb30, __first=0x2e869d0 "",
__last=0x2e869d1 "!>D\225\177") at
/dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex.h:233
#9 0x00007f954142fea0 in
std::__cxx11::regex_traits<char>::transform_primary<char const*>
(this=0x246cb30,
__first=0x7fff19050e88 "", __last=0x7fff19050e89 "V\350\002") at
/dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex.h:266
#10 0x00007f954142b7ef in
std::__detail::_BracketMatcher<std::__cxx11::regex_traits<char>, false,
false>::_M_apply(char, std::integral_constant<bool, false>)
const::{lambda()#1}::operator()() const (__closure=0x7fff19050e80)
at /dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.tcc:626
#11 0x00007f954142b970 in
std::__detail::_BracketMatcher<std::__cxx11::regex_traits<char>, false,
false>::_M_apply (
this=0x7fff19050fa0, __ch=0 '\000') at
/dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.tcc:634
#12 0x00007f9541427225 in
std::__detail::_BracketMatcher<std::__cxx11::regex_traits<char>, false,
false>::_M_make_cache (
this=0x7fff19050fa0) at
/dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.h:556
#13 0x00007f954142364a in
std::__detail::_BracketMatcher<std::__cxx11::regex_traits<char>, false,
false>::_M_ready (
this=0x7fff19050fa0) at
/dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.h:525
#14 0x00007f954142421a in
std::__detail::_Compiler<std::__cxx11::regex_traits<char>
>::_M_insert_bracket_matcher<false, false> (
this=0x7fff19051560, __neg=false) at
/dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.tcc:444
#15 0x00007f9541420d29 in
std::__detail::_Compiler<std::__cxx11::regex_traits<char>
>::_M_bracket_expression (
this=0x7fff19051560) at
/dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.tcc:363
#16 0x00007f954141c878 in
std::__detail::_Compiler<std::__cxx11::regex_traits<char> >::_M_atom
(this=0x7fff19051560)
at /dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.tcc:349
#17 0x00007f9541419a8f in
std::__detail::_Compiler<std::__cxx11::regex_traits<char> >::_M_term
(this=0x7fff19051560)
at /dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.tcc:139
#18 0x00007f95414176eb in
std::__detail::_Compiler<std::__cxx11::regex_traits<char> >::_M_alternative
(this=0x7fff19051560)
at /dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.tcc:121
#19 0x00007f954141770e in
std::__detail::_Compiler<std::__cxx11::regex_traits<char> >::_M_alternative
(this=0x7fff19051560)
at /dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.tcc:124
#20 0x00007f954141770e in
std::__detail::_Compiler<std::__cxx11::regex_traits<char> >::_M_alternative
(this=0x7fff19051560)
at /dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.tcc:124
#21 0x00007f9541415c37 in
std::__detail::_Compiler<std::__cxx11::regex_traits<char> >::_M_disjunction
(this=0x7fff19051560)
at /dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.tcc:97
#22 0x00007f9541414dd6 in
std::__detail::_Compiler<std::__cxx11::regex_traits<char> >::_Compiler
(this=0x7fff19051560,
__b=0x7f954143a7fa "\\$\\{[a-zA-Z_]+[a-zA-Z0-9_]*}", __e=0x7f954143a816 "",
__loc=..., __flags=(unknown: 16))
at /dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.tcc:82
#23 0x00007f9541413dcd in std::__detail::__compile_nfa<char const*,
std::__cxx11::regex_traits<char> > (
__first=0x7f954143a7fa "\\$\\{[a-zA-Z_]+[a-zA-Z0-9_]*}",
__last=0x7f954143a816 "", __loc=..., __flags=(unknown: 16))
at /dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex_compiler.h:203
#24 0x00007f9541412d8d in std::__cxx11::basic_regex<char,
std::__cxx11::regex_traits<char> >::basic_regex<char const*> (
this=0x7fff19051820, __first=0x7f954143a7fa
"\\$\\{[a-zA-Z_]+[a-zA-Z0-9_]*}", __last=0x7f954143a816 "", __loc=...,
__f=(unknown: 16)) at
/dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex.h:769
#25 0x00007f9541411cc2 in std::__cxx11::basic_regex<char,
std::__cxx11::regex_traits<char> >::basic_regex<char const*> (
this=0x7fff19051820, __first=0x7f954143a7fa
"\\$\\{[a-zA-Z_]+[a-zA-Z0-9_]*}", __last=0x7f954143a816 "", __f=(unknown: 16))
at /dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex.h:512
#26 0x00007f9541410b92 in std::__cxx11::basic_regex<char,
std::__cxx11::regex_traits<char> >::basic_regex (this=0x7fff19051820,
__p=0x7f954143a7fa "\\$\\{[a-zA-Z_]+[a-zA-Z0-9_]*}", __f=(unknown: 16))
at /dvl/odb/tools/gcc-7.2.0/include/c++/7.2.0/bits/regex.h:445
#27 0x00007f954140db14 in DecomposeEnvVar (input=...) at NWA_Config.cpp:1054
#28 0x00007f954140d31c in Config::Check4IncludeElement (this=0x2e5a170,
node=0x2ec2410) at NWA_Config.cpp:912
#29 0x00007f954140d1dd in Config::HandleIncludes (this=0x2e5a170,
node=0x2ec2410) at NWA_Config.cpp:874
#30 0x00007f954140d22c in Config::HandleIncludes (this=0x2e5a170,
node=0x2e877e0) at NWA_Config.cpp:891
#31 0x00007f954140ab44 in Config::Parse (this=0x2e5a170) at NWA_Config.cpp:393
#32 0x00007f95414080c3 in InstallConfig () at config.cpp:26
#33 0x00007f95414001c8 in CallStart () at ggpost.cpp:168
#34 0x00007f95414004fc in MyUserCPPExit (exit_call_type=1,
exit_call_result=0x1e36380 <exit_result>,
exit_params=0x1e363c0 <exit_params>) at ggpost.cpp:278
#35 0x00007f95414092fc in CUSEREXIT () from
/dvl/odb/apps/dev/dal/ogg_12.3/libggpost.so
#36 0x00000000005b89ba in call_user_exit_routine(short) ()
#37 0x000000000061668a in ?? ()
#38 0x0000000000710111 in ggs::gglib::MultiThreading::MainThread::ExecMain() ()
#39 0x000000000070f82c in
ggs::gglib::MultiThreading::Thread::RunThread(ggs::gglib::MultiThreading::Thread::ThreadArgs*)
()
---Type <return> to continue, or q <return> to quit---
#40 0x0000000000710085 in ggs::gglib::MultiThreading::MainThread::Run(int,
char**) ()
#41 0x00000000006173eb in main ()
ldd of the binary libggpost.so is
[odbd@evdla176 ogg_12.3]$ ldd libggpost.so
linux-vdso.so.1 => (0x00007ffddc5a0000)
libProcessStats.so => ./lib/libProcessStats.so (0x00007fd58d6c8000)
libDB.so => ./lib/libDB.so (0x00007fd58d4a6000)
libNWAtiny.so => ./lib/libNWAtiny.so (0x00007fd58d291000)
libmqapi.so => ./lib/libmqapi.so (0x00007fd58d088000)
libmqic.so => /opt/mqm/lib64/libmqic.so (0x00007fd58cf84000)
libmqmcs.so => /opt/mqm/lib64/libmqmcs.so (0x00007fd58cb58000)
libstdc++.so.6 => /dvl/odb/tools/gcc-7.2.0/lib64/libstdc++.so.6
(0x00007fd58c7c1000)
libm.so.6 => /lib64/libm.so.6 (0x00007fd58c528000)
libgcc_s.so.1 => /dvl/odb/tools/gcc-7.2.0/lib64/libgcc_s.so.1
(0x00007fd58c312000)
libc.so.6 => /lib64/libc.so.6 (0x00007fd58bf7e000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fd58bd60000)
libmqe.so => /opt/mqm/lib64/libmqe.so (0x00007fd58b52c000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007fd58b327000)
/lib64/ld-linux-x86-64.so.2 (0x00007fd58dc30000)
librt.so.1 => /lib64/librt.so.1 (0x00007fd58b11f000)
>From gcc-bugs-return-582059-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 20:52:06 2017
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Subject: [Bug fortran/44292] [libgfortran ABI breakage] Increase internal size of RECL= of the OPEN statement
Date: Fri, 17 Nov 2017 20:52:00 -0000
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jb at gcc dot gnu.org
Assignee|jvdelisle at gcc dot gnu.org |jb at gcc dot gnu.org
--- Comment #7 from Janne Blomqvist <jb at gcc dot gnu.org> ---
I have a functioning patch, will post shortly.
>From gcc-bugs-return-582060-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 21:08:41 2017
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From: "jb at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libfortran/83036] New: INQUIRE specifier NEXTREC is a 4-byte integer, should be 8
Date: Fri, 17 Nov 2017 21:08:00 -0000
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Bug ID: 83036
Summary: INQUIRE specifier NEXTREC is a 4-byte integer, should
be 8
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When working on PR 44292, I happened to notice that the same issue affects the
NEXTREC= specifier for the INQUIRE statement as well.
>From gcc-bugs-return-582061-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 21:15:39 2017
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Subject: [Bug fortran/44292] [libgfortran ABI breakage] Increase internal size of RECL= of the OPEN statement
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2017-11/msg01563.ht
| |ml
--- Comment #8 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01563.html
>From gcc-bugs-return-582062-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 21:17:17 2017
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Subject: [Bug target/82848] [8 Regression] ICE in expand_expr_real_2, at expr.c:8715
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--- Comment #3 from Will Schmidt <willschm at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #0)
> Note that GCC 7.1 did:
>
> $ powerpc64-suse-linux-gcc-7
> /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/pr37168.c -c
> /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/pr37168.c: In
> function 'foo':
> /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/powerpc/pr37168.c:12:
> 16: error: Builtin function __builtin_altivec_vmaddfp requires the -maltivec
> option
> vector float b = __builtin_vec_madd (b, a, (vector float) { C, C, C, C });
> ^
>
> So the error somehow disappeared.
Yes,.. with the gimple-folding in place, that particular function (at .gimple
time) is no longer in play.
bD.2759 = __builtin_altivec_vmaddfpD.1680 (bD.2759, aD.2756, {
3.64337600724452438440169691655378194132868104887894100657e-44,
3.64337600724452438440169691655378194132868104887894100657e-44,
3.64337600724452438440169691655378194132868104887894100657e-44,
3.64337600724452438440169691655378194132868104887894100657e-44 });
is now
bD.2759 = bD.2759 * aD.2756 + {
3.64337600724452438440169691655378194132868104887894100657e-44,
3.64337600724452438440169691655378194132868104887894100657e-44,
3.64337600724452438440169691655378194132868104887894100657e-44,
3.64337600724452438440169691655378194132868104887894100657e-44 };
.
If you use the option " -mno-fold-gimple " you should get the un-folded
behavior. Which would be good to confirm this is the root cause, but not
long-term recommended for optimization reasons.
So all that said.. I'm struggling to recreate this one.
My latest attempt was on gcc110. I've tried on a few other power systems, with
similar/same results.
Anything obvious that I may have mis-configured here?
[willschm@gcc1-power7 gcc]$ /home/willschm/gcc/install/gcc/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/home/willschm/gcc/install/gcc/bin/gcc
COLLECT_LTO_WRAPPER=/home/willschm/gcc/install/gcc/libexec/gcc/powerpc64-unknown-linux-gnu/8.0.0/lto-wrapper
Target: powerpc64-unknown-linux-gnu
Configured with: ../../src/gcc/configure
--enable-languages=c,c++,fortran,objc,obj-c++ --with-cpu=power7
--with-long-double-128 --prefix=/home/willschm/gcc/install/gcc/
--disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171117 (experimental) (GCC)
[willschm@gcc1-power7 gcc]$ /home/willschm/gcc/install/gcc/bin/gcc
/home/willschm/gcc/src/gcc/gcc/testsuite/gcc.target/powerpc/pr37168.c -c
[willschm@gcc1-power7 gcc]$ ls -lart pr37168.o
-rw-rw-r--. 1 willschm willschm 1200 Nov 17 21:06 pr37168.o
>From gcc-bugs-return-582063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 21:23:04 2017
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Subject: [Bug middle-end/83032] Copy elision for returning subobject
Date: Fri, 17 Nov 2017 21:23:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
I don't think that's one of the cases where the C++ standard allows elision,
and I am not sure how that would work in practice. The idea for the return slot
optimization is that the caller reserves enough memory for the result, and
passes a pointer to that region to the callee. Here, you'd want the callee to
forward that pointer to a nested call, which actually requires a larger region
(for a pair). So it could only work if the region was at the extremity of the
stack and the stack grows in the right direction?
>From gcc-bugs-return-582064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 21:24:25 2017
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Subject: [Bug c++/83037] New: ice in to_sreal_scale, at profile-count.c:275
Date: Fri, 17 Nov 2017 21:24:00 -0000
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Bug ID: 83037
Summary: ice in to_sreal_scale, at profile-count.c:275
Product: gcc
Version: 7.0
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For the following C++ code
class a {
public:
~a();
bool b();
void m_fn2();
};
a::~a() {
if (b())
m_fn2();
}
void c(a);
void fn2() {
a d;
c(d);
}
int __attribute__((flatten)) e() { fn2(); }
compiled by recent trunk gcc and flag -O2, I get the following result:
$ ~/gcc/results.254877/bin/g++ -c -O2 bug395.cc
bug395.cc: In function ‘int e()’:
bug395.cc:16:43: warning: no return statement in function returning non-void
[-Wreturn-type]
int __attribute__((flatten)) e() { fn2(); }
^
during GIMPLE pass: einline
bug395.cc:16:43: internal compiler error: in to_sreal_scale, at
profile-count.c:275
0xe8cab8 profile_count::to_sreal_scale(profile_count, bool*) const
../../trunk/gcc/profile-count.c:275
0xd21189 estimate_edge_size_and_time
../../trunk/gcc/ipa-fnsummary.c:2579
The bug seems to occur between revisions 254826 and 254877.
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Subject: [Bug target/79845] rs6000: make code in rs6000.c more i18n-friendly
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Work was completed some time ago. Sorry that original patches weren't flagged
to mention this PR.
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From: "tero.koskinen at iki dot fi" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
Date: Fri, 17 Nov 2017 22:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83027
Tero Koskinen <tero.koskinen at iki dot fi> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tero.koskinen at iki dot fi
--- Comment #12 from Tero Koskinen <tero.koskinen at iki dot fi> ---
I can reproduce the problem on Fedora 26 (x86_64) with Fedora's gcc.
Linking libahven.so to simple_test dynamically causes the program to get stuck
(infinite loop / dead lock?).
Compiling Ahven from source code as a part of simple_test does not cause any
problems.
I would say the problem is either in GCC or in related components (binutils,
glibc, etc.).
% gcc -v
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap
--enable-languages=c,c++,objc,obj-c++,fortran,ada,go,lto --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared
--enable-threads=posix --enable-checking=release --enable-multilib
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-gcc-major-version-only --with-linker-hash-style=gnu --enable-plugin
--enable-initfini-array --with-isl --enable-libmpx
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-gnu-indirect-function --with-tune=generic --with-arch_32=i686
--build=x86_64-redhat-linux
Thread model: posix
gcc version 7.2.1 20170915 (Red Hat 7.2.1-2) (GCC)
%
Backtrace when the problem happens:
% gdb ./simple_test
GNU gdb (GDB) Fedora 8.0.1-30.fc26
Copyright (C) 2017 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from ./simple_test...(no debugging symbols found)...done.
(gdb) run
Starting program: /home/tkoskine/tmp/victor-bug2/src/simple_test
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7ffff648f700 (LWP 5685)]
[Thread 0x7ffff648f700 (LWP 5685) exited]
^C
Thread 1 "simple_test" received signal SIGINT, Interrupt.
0x0000000000454675 in system.file_io.check_file_open ()
(gdb) bt
#0 0x0000000000454675 in system.file_io.check_file_open ()
#1 0x0000000000451039 in ada.text_io.terminate_line ()
#2 0x0000000000455b2c in system.file_io.close ()
#3 0x0000000000455e43 in system.file_io.finalize ()
#4 0x000000000045623a in system.file_io.finalize_body ()
#5 0x000000000042e3b4 in ada_main.finalize_library ()
#6 0x00000000004395b6 in system.tasking.stages.finalize_global_tasks ()
#7 0x000000000042e3df in adafinal ()
#8 0x000000000042e8ee in main ()
#9 0x00007ffff73a688a in __libc_start_main (main=0x42e898 <main>, argc=1,
argv=0x7fffffffe158, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fffffffe148) at
../csu/libc-start.c:295
#10 0x000000000042e2aa in _start ()
(gdb) stepi
0x0000000000451039 in ada.text_io.terminate_line ()
(gdb)
0x000000000045103c in ada.text_io.terminate_line ()
(gdb)
0x0000000000454e40 in system.file_io.mode ()
(gdb)
0x0000000000454e43 in system.file_io.mode ()
(gdb)
0x0000000000454e45 in system.file_io.mode ()
(gdb)
0x0000000000454e49 in system.file_io.mode ()
(gdb)
0x0000000000451041 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451043 in ada.text_io.terminate_line ()
(gdb)
0x000000000045106d in ada.text_io.terminate_line ()
(gdb)
0x000000000045106e in ada.text_io.terminate_line ()
(gdb)
0x0000000000455b2c in system.file_io.close ()
(gdb)
0x0000000000455b2f in system.file_io.close ()
(gdb)
0x0000000000455b33 in system.file_io.close ()
(gdb)
0x0000000000455b35 in system.file_io.close ()
(gdb)
0x0000000000455b3b in system.file_io.close ()
(gdb)
0x0000000000455b3e in system.file_io.close ()
(gdb)
0x0000000000455b40 in system.file_io.close ()
(gdb)
0x0000000000455b43 in system.file_io.close ()
(gdb)
0x0000000000455b47 in system.file_io.close ()
(gdb)
0x0000000000455b4a in system.file_io.close ()
(gdb)
0x0000000000455c60 in system.file_io.close ()
(gdb)
0x0000000000455c64 in system.file_io.close ()
(gdb)
0x0000000000455c6b in system.file_io.close ()
(gdb)
0x0000000000455b58 in system.file_io.close ()
(gdb)
0x0000000000455b5b in system.file_io.close ()
(gdb)
0x0000000000455b5f in system.file_io.close ()
(gdb)
0x0000000000455b62 in system.file_io.close ()
(gdb)
0x0000000000455b64 in system.file_io.close ()
(gdb)
0x0000000000455b68 in system.file_io.close ()
(gdb)
0x0000000000455b6c in system.file_io.close ()
(gdb)
0x0000000000455b70 in system.file_io.close ()
(gdb)
0x0000000000455b72 in system.file_io.close ()
(gdb)
0x0000000000455bd7 in system.file_io.close ()
(gdb)
0x0000000000455bde in system.file_io.close ()
(gdb)
0x0000000000455be0 in system.file_io.close ()
(gdb)
0x0000000000455be6 in system.file_io.close ()
(gdb)
0x0000000000435c30 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c34 in system.tasking.initialization.task_unlock ()
(gdb)
0x00000000004337f0 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337f9 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fc in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fe in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x0000000000435c39 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c3f in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c42 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c44 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c4a in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c4c in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c50 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000455bec in system.file_io.close ()
(gdb)
0x0000000000455bed in system.file_io.close ()
(gdb)
0x0000000000455bee in system.file_io.close ()
(gdb)
0x0000000000455bf0 in system.file_io.close ()
(gdb)
0x0000000000455e43 in system.file_io.finalize ()
(gdb)
0x0000000000455e46 in system.file_io.finalize ()
(gdb)
0x0000000000455e4b in system.file_io.finalize ()
(gdb)
0x0000000000455e30 in system.file_io.finalize ()
(gdb)
0x0000000000455e34 in system.file_io.finalize ()
(gdb)
0x0000000000455e39 in system.file_io.finalize ()
(gdb)
0x0000000000455e3e in system.file_io.finalize ()
(gdb)
0x0000000000455b00 in system.file_io.close ()
(gdb)
0x0000000000455b02 in system.file_io.close ()
(gdb)
0x0000000000455b03 in system.file_io.close ()
(gdb)
0x0000000000455b04 in system.file_io.close ()
(gdb)
0x0000000000455b07 in system.file_io.close ()
(gdb)
0x0000000000435ab0 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ab4 in system.tasking.initialization.task_lock ()
(gdb)
0x00000000004337f0 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337f9 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fc in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fe in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x0000000000435ab9 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435abf in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ac2 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ac5 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435acb in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435acd in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ad1 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000455b0d in system.file_io.close ()
(gdb)
0x0000000000455b10 in system.file_io.close ()
(gdb)
0x0000000000455b13 in system.file_io.close ()
(gdb)
0x0000000000455b19 in system.file_io.close ()
(gdb)
0x0000000000455b1c in system.file_io.close ()
(gdb)
0x0000000000455b20 in system.file_io.close ()
(gdb)
0x0000000000455b22 in system.file_io.close ()
(gdb)
0x0000000000455b28 in system.file_io.close ()
(gdb)
0x0000000000455b2a in system.file_io.close ()
(gdb)
0x0000000000451090 in ada.text_io.afcb_close ()
(gdb)
0x0000000000451097 in ada.text_io.afcb_close ()
(gdb)
0x0000000000451099 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510a0 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510a2 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510a9 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510ab in ada.text_io.afcb_close ()
(gdb)
0x0000000000451030 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451031 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451034 in ada.text_io.terminate_line ()
(gdb)
0x0000000000454670 in system.file_io.check_file_open ()
(gdb)
0x0000000000454673 in system.file_io.check_file_open ()
(gdb)
0x0000000000454675 in system.file_io.check_file_open ()
(gdb)
0x0000000000451039 in ada.text_io.terminate_line ()
(gdb)
0x000000000045103c in ada.text_io.terminate_line ()
(gdb)
0x0000000000454e40 in system.file_io.mode ()
(gdb)
0x0000000000454e43 in system.file_io.mode ()
(gdb)
0x0000000000454e45 in system.file_io.mode ()
(gdb)
0x0000000000454e49 in system.file_io.mode ()
(gdb)
0x0000000000451041 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451043 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451045 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451049 in ada.text_io.terminate_line ()
(gdb)
0x000000000045104b in ada.text_io.terminate_line ()
(gdb)
0x0000000000451052 in ada.text_io.terminate_line ()
(gdb)
0x000000000045106d in ada.text_io.terminate_line ()
(gdb)
0x000000000045106e in ada.text_io.terminate_line ()
(gdb)
0x0000000000455b2c in system.file_io.close ()
(gdb)
0x0000000000455b2f in system.file_io.close ()
(gdb)
0x0000000000455b33 in system.file_io.close ()
(gdb)
0x0000000000455b35 in system.file_io.close ()
(gdb)
0x0000000000455b3b in system.file_io.close ()
(gdb)
0x0000000000455b3e in system.file_io.close ()
(gdb)
0x0000000000455b40 in system.file_io.close ()
(gdb)
0x0000000000455b43 in system.file_io.close ()
(gdb)
0x0000000000455b47 in system.file_io.close ()
(gdb)
0x0000000000455b4a in system.file_io.close ()
(gdb)
0x0000000000455c60 in system.file_io.close ()
(gdb)
0x0000000000455c64 in system.file_io.close ()
(gdb)
0x0000000000455c6b in system.file_io.close ()
(gdb)
0x0000000000455b58 in system.file_io.close ()
(gdb)
0x0000000000455b5b in system.file_io.close ()
(gdb)
0x0000000000455b5f in system.file_io.close ()
(gdb)
0x0000000000455b62 in system.file_io.close ()
(gdb)
0x0000000000455b64 in system.file_io.close ()
(gdb)
0x0000000000455b68 in system.file_io.close ()
(gdb)
0x0000000000455b6c in system.file_io.close ()
(gdb)
0x0000000000455b70 in system.file_io.close ()
(gdb)
0x0000000000455b72 in system.file_io.close ()
(gdb)
0x0000000000455bd7 in system.file_io.close ()
(gdb)
0x0000000000455bde in system.file_io.close ()
(gdb)
0x0000000000455be0 in system.file_io.close ()
(gdb)
0x0000000000455be6 in system.file_io.close ()
(gdb)
0x0000000000435c30 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c34 in system.tasking.initialization.task_unlock ()
(gdb)
0x00000000004337f0 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337f9 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fc in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fe in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x0000000000435c39 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c3f in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c42 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c44 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c4a in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c4c in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c50 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000455bec in system.file_io.close ()
(gdb)
0x0000000000455bed in system.file_io.close ()
(gdb)
0x0000000000455bee in system.file_io.close ()
(gdb)
0x0000000000455bf0 in system.file_io.close ()
(gdb)
0x0000000000455e43 in system.file_io.finalize ()
(gdb)
0x0000000000455e46 in system.file_io.finalize ()
(gdb)
0x0000000000455e4b in system.file_io.finalize ()
(gdb)
0x0000000000455e30 in system.file_io.finalize ()
(gdb)
0x0000000000455e34 in system.file_io.finalize ()
(gdb)
0x0000000000455e39 in system.file_io.finalize ()
(gdb)
0x0000000000455e3e in system.file_io.finalize ()
(gdb)
0x0000000000455b00 in system.file_io.close ()
(gdb)
0x0000000000455b02 in system.file_io.close ()
(gdb)
0x0000000000455b03 in system.file_io.close ()
(gdb)
0x0000000000455b04 in system.file_io.close ()
(gdb)
0x0000000000455b07 in system.file_io.close ()
(gdb)
0x0000000000435ab0 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ab4 in system.tasking.initialization.task_lock ()
(gdb)
0x00000000004337f0 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337f9 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fc in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fe in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x0000000000435ab9 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435abf in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ac2 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ac5 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435acb in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435acd in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ad1 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000455b0d in system.file_io.close ()
(gdb)
0x0000000000455b10 in system.file_io.close ()
(gdb)
0x0000000000455b13 in system.file_io.close ()
(gdb)
0x0000000000455b19 in system.file_io.close ()
(gdb)
0x0000000000455b1c in system.file_io.close ()
(gdb)
0x0000000000455b20 in system.file_io.close ()
(gdb)
0x0000000000455b22 in system.file_io.close ()
(gdb)
0x0000000000455b28 in system.file_io.close ()
(gdb)
0x0000000000455b2a in system.file_io.close ()
(gdb)
0x0000000000451090 in ada.text_io.afcb_close ()
(gdb)
0x0000000000451097 in ada.text_io.afcb_close ()
(gdb)
0x0000000000451099 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510a0 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510a2 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510a9 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510ab in ada.text_io.afcb_close ()
(gdb)
0x0000000000451030 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451031 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451034 in ada.text_io.terminate_line ()
(gdb)
0x0000000000454670 in system.file_io.check_file_open ()
(gdb)
0x0000000000454673 in system.file_io.check_file_open ()
(gdb)
0x0000000000454675 in system.file_io.check_file_open ()
(gdb)
0x0000000000451039 in ada.text_io.terminate_line ()
(gdb)
0x000000000045103c in ada.text_io.terminate_line ()
(gdb)
0x0000000000454e40 in system.file_io.mode ()
(gdb)
0x0000000000454e43 in system.file_io.mode ()
(gdb)
0x0000000000454e45 in system.file_io.mode ()
(gdb)
0x0000000000454e49 in system.file_io.mode ()
(gdb)
0x0000000000451041 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451043 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451045 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451049 in ada.text_io.terminate_line ()
(gdb)
0x000000000045104b in ada.text_io.terminate_line ()
(gdb)
0x0000000000451052 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451054 in ada.text_io.terminate_line ()
(gdb)
0x000000000045105b in ada.text_io.terminate_line ()
(gdb)
0x000000000045106d in ada.text_io.terminate_line ()
(gdb)
0x000000000045106e in ada.text_io.terminate_line ()
(gdb)
0x0000000000455b2c in system.file_io.close ()
(gdb)
0x0000000000455b2f in system.file_io.close ()
(gdb)
0x0000000000455b33 in system.file_io.close ()
(gdb)
0x0000000000455b35 in system.file_io.close ()
(gdb)
0x0000000000455b3b in system.file_io.close ()
(gdb)
0x0000000000455b3e in system.file_io.close ()
(gdb)
0x0000000000455b40 in system.file_io.close ()
(gdb)
0x0000000000455b43 in system.file_io.close ()
(gdb)
0x0000000000455b47 in system.file_io.close ()
(gdb)
0x0000000000455b4a in system.file_io.close ()
(gdb)
0x0000000000455c60 in system.file_io.close ()
(gdb)
0x0000000000455c64 in system.file_io.close ()
(gdb)
0x0000000000455c6b in system.file_io.close ()
(gdb)
0x0000000000455b58 in system.file_io.close ()
(gdb)
0x0000000000455b5b in system.file_io.close ()
(gdb)
0x0000000000455b5f in system.file_io.close ()
(gdb)
0x0000000000455b62 in system.file_io.close ()
(gdb)
0x0000000000455b64 in system.file_io.close ()
(gdb)
0x0000000000455b68 in system.file_io.close ()
(gdb)
0x0000000000455b6c in system.file_io.close ()
(gdb)
0x0000000000455b70 in system.file_io.close ()
(gdb)
0x0000000000455b72 in system.file_io.close ()
(gdb)
0x0000000000455bd7 in system.file_io.close ()
(gdb)
0x0000000000455bde in system.file_io.close ()
(gdb)
0x0000000000455be0 in system.file_io.close ()
(gdb)
0x0000000000455be6 in system.file_io.close ()
(gdb)
0x0000000000435c30 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c34 in system.tasking.initialization.task_unlock ()
(gdb)
0x00000000004337f0 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337f9 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fc in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fe in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x0000000000435c39 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c3f in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c42 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c44 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c4a in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c4c in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c50 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000455bec in system.file_io.close ()
(gdb)
0x0000000000455bed in system.file_io.close ()
(gdb)
0x0000000000455bee in system.file_io.close ()
(gdb)
0x0000000000455bf0 in system.file_io.close ()
(gdb)
0x0000000000455e43 in system.file_io.finalize ()
(gdb)
0x0000000000455e46 in system.file_io.finalize ()
(gdb)
0x0000000000455e4b in system.file_io.finalize ()
(gdb)
0x0000000000455e30 in system.file_io.finalize ()
(gdb)
0x0000000000455e34 in system.file_io.finalize ()
(gdb)
0x0000000000455e39 in system.file_io.finalize ()
(gdb)
0x0000000000455e3e in system.file_io.finalize ()
(gdb)
0x0000000000455b00 in system.file_io.close ()
(gdb)
0x0000000000455b02 in system.file_io.close ()
(gdb)
0x0000000000455b03 in system.file_io.close ()
(gdb)
0x0000000000455b04 in system.file_io.close ()
(gdb)
0x0000000000455b07 in system.file_io.close ()
(gdb)
0x0000000000435ab0 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ab4 in system.tasking.initialization.task_lock ()
(gdb)
0x00000000004337f0 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337f9 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fc in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fe in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x0000000000435ab9 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435abf in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ac2 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ac5 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435acb in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435acd in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ad1 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000455b0d in system.file_io.close ()
(gdb)
0x0000000000455b10 in system.file_io.close ()
(gdb)
0x0000000000455b13 in system.file_io.close ()
(gdb)
0x0000000000455b19 in system.file_io.close ()
(gdb)
0x0000000000455b1c in system.file_io.close ()
(gdb)
>From gcc-bugs-return-582067-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 22:16:15 2017
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Subject: [Bug target/69493] Poor code generation for return of struct containing vectors on PPC64LE
Date: Fri, 17 Nov 2017 22:16:00 -0000
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--- Comment #7 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Peter Bergner from comment #6)
> When compiling for POWER9, we get the code we want/expect:
FYI, we also get optimal code (ie, just a blr) when compiling on POWER8 BE.
>From gcc-bugs-return-582068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 22:45:36 2017
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Subject: [Bug target/81356] __builtin_strcpy is not good for copying an empty string on aarch64
Date: Fri, 17 Nov 2017 22:45:00 -0000
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--- Comment #7 from Steve Ellcey <sje at gcc dot gnu.org> ---
Author: sje
Date: Fri Nov 17 22:44:32 2017
New Revision: 254901
URL: https://gcc.gnu.org/viewcvs?rev=254901&root=gcc&view=rev
Log:
2017-11-17 Steve Ellcey <sellcey@cavium.com>
PR target/81356
* config/aarch64/aarch64.c (aarch64_use_by_pieces_infrastructure_p):
Remove.
(TARGET_USE_BY_PIECES_INFRASTRUCTURE_P): Remove define.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64.c
>From gcc-bugs-return-582069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 23:09:06 2017
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Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
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--- Comment #13 from Victor Porton <porton at narod dot ru> ---
It is a GCC bug rather than an Ahven bug, because the bug is triggered by `with
Ada.Text_IO;` (and disappears if we remove this line from spawn-signals.adb)
which should not influence semantics of the program, because the imported
package is not used.
>From gcc-bugs-return-582070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 17 23:10:57 2017
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Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
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--- Comment #14 from Tero Koskinen <tero.koskinen at iki dot fi> ---
Created attachment 42640
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42640&action=edit
ahven sources + modified simple_test
I added a way to reproduce the problem.
Extract all files, check Makefile, run "make all && make run".
Expected results:
"make run" (simple_test) finishes successfully.
Actual results (with gcc 7.2 on Fedora 26):
"make run" (simple_test) gets stuck to infinite loop.
I simplified simple_test.adb into following:
with Text_IO;
procedure Simple_Test is
begin
null;
end Simple_Test;
Note that if you remove "for Library_Interface use .." statement from
ahven_simple_lib.gpr, the problem does not appear.
Also, if you use static library, the problem does not appear.
It is required that you use shared library and specify the library interface
files.
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Subject: [Bug c++/82930] [C++17] ICE: in is_normal_capture_proxy, at cp/lambda.c:288 with structured binding in a lambda function with auto typed arguments
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-17
Summary|[C++17/AArch64] ICE: in |[C++17] ICE: in
|is_normal_capture_proxy, at |is_normal_capture_proxy, at
|cp/lambda.c:288 with |cp/lambda.c:288 with
|structured binding in a |structured binding in a
|lambda function with auto |lambda function with auto
|typed arguments |typed arguments
Ever confirmed|0 |1
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Happens on x86_64-linux too, I suspect everywhere.
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Subject: [Bug c++/82936] Segment fault crash for non-type template parameter(test case small enough)
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----------------------------------------------------------------------------
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Subject: [Bug c++/82953] ICE in tree_check() ../../gcc/gcc/tree.h:3087
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83024] ICE in build_address, at cp/typeck.c:5623
Date: Sat, 18 Nov 2017 00:00:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-18
Ever confirmed|0 |1
>From gcc-bugs-return-582075-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 00:02:29 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83037] ice in to_sreal_scale, at profile-count.c:275
Date: Sat, 18 Nov 2017 00:02:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Doesn't look like a C++ front-end issue to me
>From gcc-bugs-return-582076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 01:32:16 2017
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From: "gerald at pfeifer dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug regression/83038] New: [8 regression] warning at random points in the input (array subscript -1 is below array bounds)
Date: Sat, 18 Nov 2017 01:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83038
Bug ID: 83038
Summary: [8 regression] warning at random points in the input
(array subscript -1 is below array bounds)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: regression
Assignee: unassigned at gcc dot gnu.org
Reporter: gerald at pfeifer dot com
CC: dmalcolm at redhat dot com, msebor at gcc dot gnu.org,
polacek at redhat dot com
Target Milestone: ---
Created attachment 42641
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42641&action=edit
Testcase
A couple of days the attached testcase started issuing a new warning
which is actually wrong -- or at least points to a completely bogus
location.
In fact, trying to trim this down, the message started pointing to a
different location, until I reached a case which definitely makes no
sense at all:
gcc -c -o config.o -O2 -g -Wall c2.i
config.c: In function ‘ConfigureDevicesDlgProc’:
config.c:132:29: warning: array subscript -1 is below array bounds of
‘DIDEVICEOBJECTINSTANCEW[256] {aka struct DIDEVICEOBJECTINSTANCEW[256]}’
[-Warray-bounds]
/* Keep the action and text in the listview item */
^~~
This was on an i386-unknown-freebsd10 system, but compiling the testcase
on amd64-unknown-freebsd11 I got the same (at a different location).
(This is from Wine, where I build the latest git code nightly with the
latest version of GCC head.)
>From gcc-bugs-return-582077-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 01:35:12 2017
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Subject: [Bug libgomp/60035] [PATCH] make it possible to use OMP on both sides of a fork (without violating standard)
Date: Sat, 18 Nov 2017 01:35:00 -0000
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pouar at pouar dot net changed:
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----------------------------------------------------------------------------
CC| |pouar at pouar dot net
--- Comment #9 from pouar at pouar dot net ---
Any news on this? as I would like to use OpenMP with BLAS but I'm currently
stuck with pthreads because of this.
>From gcc-bugs-return-582078-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 02:57:20 2017
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Subject: [Bug regression/83038] [8 regression] warning at random points in the input (array subscript -1 is below array bounds)
Date: Sat, 18 Nov 2017 02:57:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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CC| |dmalcolm at gcc dot gnu.org
--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
This is a .i file; have the source files it refers to been edited since the .i
file was generated?
>From gcc-bugs-return-582079-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 03:14:47 2017
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From: "junyer at google dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70932] flexible array member with non-trivial destructor
Date: Sat, 18 Nov 2017 03:14:00 -0000
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--- Comment #10 from Paul Wankadia <junyer at google dot com> ---
(In reply to Martin Sebor from comment #9)
> Sorry, I haven't gotten to it yet.
Was this bug fixed in GCC 7.x? :)
I ask because the workaround in RE2 is conditioned thus:
#if !defined(__clang__) && defined(__GNUC__) && __GNUC__ == 6 && __GNUC_MINOR__
>= 1
No one has reported breakage with GCC 7.x (which is why I had forgotten about
the bug until just now!) and our build matrix on Travis CI is clean.
>From gcc-bugs-return-582080-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 06:51:13 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/83034] [8 Regression] ice in mem_loc_descriptor, at dwarf2out.c :15669
Date: Sat, 18 Nov 2017 06:51:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-582081-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 06:59:27 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83037] [8 Regression] ice in to_sreal_scale, at profile-count.c:275
Date: Sat, 18 Nov 2017 06:59:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Version|7.0 |8.0
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>From gcc-bugs-return-582082-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 07:12:17 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/83037] [8 Regression] ice in to_sreal_scale, at profile-count.c:275
Date: Sat, 18 Nov 2017 07:12:00 -0000
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--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
This issue will get fixed by:
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01580.html
I will close this bug once the patch lands in trunk.
>From gcc-bugs-return-582083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 08:52:30 2017
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Subject: [Bug c++/83039] New: ice in estimate_node_size_and_time, at ipa-fnsummary.c:2750
Date: Sat, 18 Nov 2017 08:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83039
Bug ID: 83039
Summary: ice in estimate_node_size_and_time, at
ipa-fnsummary.c:2750
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Created attachment 42642
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42642&action=edit
gzipped C++ source code
Recent gcc trunk with flags -O2 -fno-guess-branch-probability
and the attached C++ source code does this:
during IPA pass: inline
src/symmetrictraversal.cpp:617:1: internal compiler error: in
estimate_node_size_and_time, at ipa-fnsummary.c:2750
0x5a0d01 estimate_node_size_and_time(cgraph_node*, unsigned int, unsigned int,
vec<tree_node*, va_heap, vl_ptr>, vec<ipa_polymorphic_call_context, va_heap,
vl_ptr>, vec<ipa_agg_jump_function*, va_heap, vl_ptr>, int*, int*, sreal*,
sreal*, int*, vec<inline_param_summary, va_heap, vl_ptr>)
../../trunk/gcc/ipa-fnsummary.c:2750
0xd285fd do_estimate_edge_time(cgraph_edge*)
../../trunk/gcc/ipa-inline-analysis.c:170
0xd29047 do_estimate_edge_size(cgraph_edge*)
../../trunk/gcc/ipa-inline-analysis.c:225
The problem seems to exist between revisions 254718 and 254772
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Subject: [Bug regression/83038] [8 regression] warning at random points in the input (array subscript -1 is below array bounds)
Date: Sat, 18 Nov 2017 08:58:00 -0000
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--- Comment #2 from Gerald Pfeifer <gerald at pfeifer dot com> ---
Created attachment 42643
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42643&action=edit
Full preprocesssed source file
(In reply to David Malcolm from comment #1)
> This is a .i file; have the source files it refers to been edited since the
> .i file was generated?
Just the .i file I stripped down a little.
Here is the full original. This shows
config.c: In function ‘ConfigureDevicesDlgProc’:
config.c:303:29: warning: array subscript -1 is below array bounds of
‘DIDEVICEOBJECTINSTANCEW[256] {aka struct DIDEVICEOBJECTINSTANCEW[256]}’
[-Warray-bounds]
DIDEVICEOBJECTINSTANCEW ddo = device->ddo[obj];
^~~
Note, no subscript (nor -1) present where the ^~~ points to.
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Subject: [Bug target/82961] ICE in dwarf2out.c: deferred_asm_name != NULL
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC|sebastian.huber@embedded-br |tgingold at free dot fr
|ains.de |
--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
Could anybody test the tentative patch from comment 6?
I don't have a setup to build and test for the vms os.
Thanks,
- Tom
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Subject: [Bug target/82960] spu_machine_dependent_reorg does not handle jump_table_data insn
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Tom de Vries <vries at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |dje.gcc at gmail dot com
--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Could anybody test the tentative patch from comment 1?
I don't have a setup to build and test for the spu cpu.
Thanks,
- Tom
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/83039] ice in estimate_node_size_and_time, at ipa-fnsummary.c:2750
Date: Sat, 18 Nov 2017 10:27:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-18
CC| |hubicka at ucw dot cz,
| |marxin at gcc dot gnu.org,
| |trippels at gcc dot gnu.org
Component|c++ |ipa
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
This issue will also get fixed by:
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01580.html
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Subject: [Bug libfortran/83036] INQUIRE specifier NEXTREC is a 4-byte integer, should be 8
Date: Sat, 18 Nov 2017 10:35:00 -0000
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2017-11/msg01624.ht
| |ml
Assignee|unassigned at gcc dot gnu.org |jb at gcc dot gnu.org
--- Comment #1 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01624.html
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Subject: [Bug c++/26426] Type layout bug
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #2)
> See https://gcc.gnu.org/ml/gcc-bugs/2017-08/msg01667.html where I said:
>
> I don't think this is a bug. B is the primary base class for Z so has already
> been allocated (as part of the Y subobject, in I-2b), and so the B base class
> of the X subobject is not allocated as part of the X (in III).
>
> https://itanium-cxx-abi.github.io/cxx-abi/abi.html#a17
Since Chris hasn't responded, I'm closing this accordingly.
>From gcc-bugs-return-582090-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 11:04:20 2017
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Subject: [Bug c++/39466] frepo relinking causes error - object in .o but not in .rpo or vice versa
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WORKSFORME
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #2)
> redoing https://gcc.gnu.org/ml/gcc-bugs/2017-08/msg01604.html
>
> Eric Gallager <egallager at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|UNCONFIRMED |WAITING
> Last reconfirmed| |2017-08-14
> CC| |egallager at gcc dot gnu.org
> Ever confirmed|0 |1
> Severity|major |normal
>
> --- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
> I can't reproduce with current gcc on i386-apple-darwin9.8.0, compilation
> fails
> instead with:
>
> $ /usr/local/bin/g++ -frepo -DCOMPILING_WITH_FREPO=1 -pipe -frepo
> -DCOMPILING_WITH_FREPO=1 -D_REENTRANT -Wctor-dtor-privacy -Wall -DNDEBUG
> -fstack-protector-all -O2 -ftree-loop-linear -fweb -march=core2 -mssse3
> -fdiagnostics-show-option -fomit-frame-pointer -fPIC -rdynamic -std=gnu++98
> -o
> XmlImplementationFactory.exe XmlImplementationFactory.ii 2>&1
> <built-in>: warning: -frepo must be used with -c
> util/impl/xml/XmlImplementationFactory.cpp:33:1: error: declaration of
> ‘boost::shared_ptr<dogs::util::TXmlImplementation<T> >
> dogs::util::XmlImplementationFactory::createImplementation(const T&,
> dogs::util::XmlImplementationFactory::EImplType) [with T =
> dogs::util::xml::TSimpleTypes<std::basic_string<wchar_t> >]’ has a different
> exception specifier
> In file included from util/impl/xml/XmlImplementationFactory.cpp:3:0:
> util/impl/../include/XmlImplementationFactory.h:26:11: note: from previous
> declaration ‘boost::shared_ptr<dogs::util::TXmlImplementation<T> >
> dogs::util::XmlImplementationFactory::createImplementation(const T&,
> dogs::util::XmlImplementationFactory::EImplType) throw
> (dogs::util::xml::XmlException) [with T =
> dogs::util::xml::TSimpleTypes<std::basic_string<wchar_t> >]’
> util/impl/xml/XmlImplementationFactory.cpp:49:1: error: declaration of
> ‘boost::shared_ptr<dogs::util::TXmlImplementation<T> >
> dogs::util::XmlImplementationFactory::createImplementation(const T&,
> dogs::util::XmlImplementationFactory::EImplType) [with T =
> dogs::util::xml::TSimpleTypes<std::basic_string<char> >]’ has a different
> exception specifier
> In file included from util/impl/xml/XmlImplementationFactory.cpp:3:0:
> util/impl/../include/XmlImplementationFactory.h:26:11: note: from previous
> declaration ‘boost::shared_ptr<dogs::util::TXmlImplementation<T> >
> dogs::util::XmlImplementationFactory::createImplementation(const T&,
> dogs::util::XmlImplementationFactory::EImplType) throw
> (dogs::util::xml::XmlException) [with T =
> dogs::util::xml::TSimpleTypes<std::basic_string<char> >]’
> $
>
> Can you try again?
No response; closing.
>From gcc-bugs-return-582091-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 11:10:21 2017
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Subject: [Bug c++/67075] Infinite GC loop with ggc-min-expand=0
Date: Sat, 18 Nov 2017 11:10:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #4)
> redoing https://gcc.gnu.org/ml/gcc-bugs/2017-08/msg01605.html
>
> Eric Gallager <egallager at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|UNCONFIRMED |WAITING
> Last reconfirmed| |2017-08-14
> CC| |egallager at gcc dot gnu.org
> Ever confirmed|0 |1
>
> --- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
> (In reply to Andrew Pinski from comment #2)
> > Sounds more like ggc_collect is now always doing the gc and there are a lot
> > of ggc_collect calls.
> >
> > So what is happening we are close to your 32M limit you set, so any garbage
> > that is produced in a pass will cause the next call to ggc_collect to always
> > collect. This means there a lot of calls to ggc_collect but in the normal
> > case (non 0 case), it does not matter.
> >
> > You might want to try 5.2 as 4.8.x is no longer supported and there have
> > been some memory reductions happened since 4.8.x.
>
> Changing to WAITING until reporter tries a supported version.
Reporter still hasn't tried a supported version; closing.
>From gcc-bugs-return-582092-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 11:24:52 2017
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Subject: [Bug ipa/83039] ice in estimate_node_size_and_time, at ipa-fnsummary.c:2750
Date: Sat, 18 Nov 2017 11:24:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |UNCONFIRMED
Ever confirmed|1 |0
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Actually, I cannot reproduce the issue at all.
>From gcc-bugs-return-582093-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 11:31:35 2017
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83039] ice in estimate_node_size_and_time, at ipa-fnsummary.c:2750
Date: Sat, 18 Nov 2017 11:31:00 -0000
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--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Markus Trippelsdorf from comment #2)
> Actually, I cannot reproduce the issue at all.
Platform is x86_64.
Reduced code is
$ more bug396-min.cc
template <typename b, typename c> struct g {
b ad;
c e;
};
template <typename b, typename c> void operator<(g<b, c> h, g<b, c> j) {
h.e < j.e;
}
class ae {
public:
~ae();
};
template <typename d> struct n {
void operator()(d h, d j) { h < j; }
};
struct o {
template <typename> using ai = ae;
};
struct p {
typedef p *an;
};
template <typename d> struct F { d operator*(); };
struct q {
bool operator==(q);
p::an a;
};
template <typename ax, typename ap> class r {
public:
typedef long az;
typedef F<ap> bb;
q bd(ap *, p, const ax &) const;
q be();
q bf(const ax &) const;
};
template <typename ax, typename ap> q r<ax, ap>::bf(const ax &h) const {
p i;
q a = bd(0, i, h);
return a;
}
class s;
template <typename d, typename bz = n<g<s, s>>> class t {
typedef r<g<s, s>, g<g<s, s>, d>> cf;
cf cg;
public:
d operator[](g<s, s> &h) {
typename cf::bb b;
cj()(h, (*b).ad);
return (*b).e;
}
bz cj();
typename cf::az ck() {
g<s, s> f;
return cg.bf(f) == cg.be() ? 0 : 1;
}
};
struct K {
struct : o::ai<int> {
} cn;
};
class L {
K bn;
};
struct u {
u(int);
};
class N {
public:
void cu(u);
};
class s {
public:
L k;
int cw();
void operator<(s &) {
if (cw())
for (; cw();)
;
}
} typedef cx;
int l, c;
class v {
struct w {
N dd;
};
t<w> dg;
public:
v(int);
void dh() {
g<cx, cx> m;
dg.ck();
dg[m];
dg[m] = dg[m];
dg[m].dd.cu(l);
}
};
void d() {
v d(c);
for (;;)
d.dh();
}
>From gcc-bugs-return-582094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 11:37:15 2017
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Subject: [Bug ipa/83039] ice in estimate_node_size_and_time, at ipa-fnsummary.c:2750
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--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Can you please try again with current trunk: r254913?
There are a lot of IPA related fixes after 254772.
>From gcc-bugs-return-582095-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 11:38:24 2017
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From: "tgingold at free dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82961] ICE in dwarf2out.c: deferred_asm_name != NULL
Date: Sat, 18 Nov 2017 11:38:00 -0000
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--- Comment #8 from Tristan Gingold <tgingold at free dot fr> ---
Looks OK.
> On 18 Nov 2017, at 10:21, vries at gcc dot gnu.org <gcc-bugzilla@gcc.gnu.org> wrote:
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82961
>
> Tom de Vries <vries at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC|sebastian.huber@embedded-br |tgingold at free dot fr
> |ains.de |
>
> --- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
> Could anybody test the tentative patch from comment 6?
>
> I don't have a setup to build and test for the vms os.
>
> Thanks,
> - Tom
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
>From gcc-bugs-return-582096-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 12:30:47 2017
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Subject: [Bug ipa/83037] [8 Regression] ice in to_sreal_scale, at profile-count.c:275
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--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
I just tried revision 254913 and it still looks broken to me.
$ ../results.254913/bin/g++ -c -w -O2 bug395-min.cc
during GIMPLE pass: einline
bug395-min.cc: In function ‘int e()’:
bug395-min.cc:16:43: internal compiler error: in to_sreal_scale, at
profile-count.c:275
>From gcc-bugs-return-582097-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 12:32:12 2017
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Subject: [Bug ipa/83039] ice in estimate_node_size_and_time, at ipa-fnsummary.c:2750
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--- Comment #5 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Markus Trippelsdorf from comment #4)
> Can you please try again with current trunk: r254913?
> There are a lot of IPA related fixes after 254772.
Looks fixed by 254913 to me.
>From gcc-bugs-return-582098-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 12:39:53 2017
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Subject: [Bug ipa/83039] ice in estimate_node_size_and_time, at ipa-fnsummary.c:2750
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Closing.
>From gcc-bugs-return-582099-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 12:40:16 2017
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Subject: [Bug ipa/83037] [8 Regression] ice in to_sreal_scale, at profile-count.c:275
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--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Yes, the patch isn't commited yet.
>From gcc-bugs-return-582100-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 15:53:33 2017
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From: "antoshkka at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/83032] Copy elision for returning subobject
Date: Sat, 18 Nov 2017 15:53:00 -0000
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--- Comment #2 from Antony Polukhin <antoshkka at gmail dot com> ---
> I don't think that's one of the cases where the C++ standard allows elision
Yes, you're right (currently I try to convince C++ standard pepole that
allowing it could be benefical).
But C does not forbit such optimization. Following code could benefit from it:
typedef struct big_ { char data[1024];} big;
struct ts {big a; big b; };
struct ts foo();
big testing1() {
return foo().b;
}
> So it could only work if the region was at the extremity of the stack and the stack grows in the right direction?
Yes, right. But in the above example it could save you from memcpy.
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Subject: [Bug fortran/83012] [8 Regression] Simply contiguous pointer function not recognized as contiguous
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--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sat Nov 18 15:53:21 2017
New Revision: 254914
URL: https://gcc.gnu.org/viewcvs?rev=254914&root=gcc&view=rev
Log:
2017-11-18 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/83012
* expr.c (gfc_is_simply_contiguous): If a function call through a
class variable is done through a reference, check the function's
interface.
2017-11-18 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/83012
* gfortran.dg/contiguous_5.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/contiguous_5.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/83012] [8 Regression] Simply contiguous pointer function not recognized as contiguous
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed on trunk, closing.
Thanks for the bug report!
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Subject: [Bug c++/26426] Type layout bug
Date: Sat, 18 Nov 2017 16:08:00 -0000
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--- Comment #4 from Chris Lattner <sabre at nondot dot org> ---
Works for me, I'm not following GCC bugs these days. Thanks,
-Chris
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Subject: [Bug fortran/44292] [libgfortran ABI breakage] Increase internal size of RECL= of the OPEN statement
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--- Comment #9 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Author: jb
Date: Sat Nov 18 16:13:20 2017
New Revision: 254915
URL: https://gcc.gnu.org/viewcvs?rev=254915&root=gcc&view=rev
Log:
PR 44292 Enable large record lengths in OPEN and INQUIRE statements
This is a straightforward change that we can do now that the ABI has
been bumped (again!).
Regtested on x86_64-pc-linux-gnu.
gcc/fortran/ChangeLog:
2017-11-18 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/44292
* ioparm.def (IOPARM): Make recl_in intio, and recl_out pintio.
libgfortran/ChangeLog:
2017-11-18 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/44292
* io/io.h: Make recl_in a GC_IO_INT and recl_out a type
GFC_IO_INT*.
gcc/testsuite/ChangeLog:
2017-11-18 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/44292
* gfortran.dg/large_recl.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/large_recl.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/ioparm.def
trunk/gcc/testsuite/ChangeLog
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/io.h
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Subject: [Bug libstdc++/48101] obscure error message with std::set<const int>
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gccbugs at jbapple dot com changed:
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--- Comment #3 from gccbugs at jbapple dot com ---
libc++ handles this with a partial template specialization like
template<typename T>
class allocator<const T> {
...
See
https://github.com/llvm-mirror/libcxx/blob/b4a34c08ac01146141a9940bcfb0a680d24dc092/include/memory#L1817
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From: "jb at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/83036] INQUIRE specifier NEXTREC is a 4-byte integer, should be 8
Date: Sat, 18 Nov 2017 16:56:00 -0000
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--- Comment #2 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Author: jb
Date: Sat Nov 18 16:56:21 2017
New Revision: 254916
URL: https://gcc.gnu.org/viewcvs?rev=254916&root=gcc&view=rev
Log:
PR 83036 Make NEXTREC specifier for INQUIRE work for large record numbers
This is accomplished by making the NEXTREC specifier be a 8 byte
integer where supported.
I wasn't able to come up with a testcase that does not create a large
file that could be added to the testsuite, but here's one which
creates a 2 GB file:
program nextrec
implicit none
integer(8) :: ii, n
open(10, file="foo.dat", recl=1, access="direct", form="unformatted", &
status="replace")
do ii = 1, huge(1) + 2_8
write(10, rec=ii) 'a'
end do
inquire(10, nextrec=n)
if (n /= huge(1) + 3_8) then
call abort()
end if
close(10, status="delete")
end program nextrec
Regtested on x86_64-pc-linux-gnu.
gcc/fortran/ChangeLog:
2017-11-18 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/83036
* ioparm.def (IOPARM): Make nextrec a pintio.
libgfortran/ChangeLog:
2017-11-18 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/83036
* io/io.h: Make nextrec a GFC_IO_INT*.
---
gcc/fortran/ioparm.def | 2 +-
libgfortran/io/io.h | 3 +--
2 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/gcc/fortran/ioparm.def b/gcc/fortran/ioparm.def
index 5fc04bc..59cc7cd 100644
--- a/gcc/fortran/ioparm.def
+++ b/gcc/fortran/ioparm.def
@@ -62,7 +62,7 @@ IOPARM (inquire, exist, 1 << 7, pint4)
IOPARM (inquire, opened, 1 << 8, pint4)
IOPARM (inquire, number, 1 << 9, pint4)
IOPARM (inquire, named, 1 << 10, pint4)
-IOPARM (inquire, nextrec, 1 << 11, pint4)
+IOPARM (inquire, nextrec, 1 << 11, pintio)
IOPARM (inquire, recl_out, 1 << 12, pintio)
IOPARM (inquire, strm_pos_out, 1 << 13, pintio)
IOPARM (inquire, file, 1 << 14, char1)
diff --git a/libgfortran/io/io.h b/libgfortran/io/io.h
index 3330bce..d29b112 100644
--- a/libgfortran/io/io.h
+++ b/libgfortran/io/io.h
@@ -388,8 +388,7 @@ typedef struct
{
st_parameter_common common;
GFC_INTEGER_4 *exist, *opened, *number, *named;
- GFC_INTEGER_4 *nextrec;
- GFC_IO_INT *recl_out, *strm_pos_out;
+ GFC_IO_INT *nextrec, *recl_out, *strm_pos_out;
CHARACTER1 (file);
CHARACTER2 (access);
CHARACTER1 (form);
>From gcc-bugs-return-582107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 16:59:33 2017
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Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
Date: Sat, 18 Nov 2017 16:59:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pault at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #10 from Paul Thomas <pault at gcc dot gnu.org> ---
I happened upon this bug in the course of fixing PR78990. It looked at first
sight to be similar but is not.... of course. However, the fix was real easy
and I'll submit it a bit later on.
Thanks for the report and sorry that it is taken so long.
Paul
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Subject: [Bug libfortran/83036] INQUIRE specifier NEXTREC is a 4-byte integer, should be 8
Date: Sat, 18 Nov 2017 17:00:00 -0000
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Fixed on trunk, closing.
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Subject: [Bug target/61729] FAIL: g++.dg/abi/scoped1.C -std=gnu++11 execution test
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed everywhere.
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Subject: [Bug c++/70932] flexible array member with non-trivial destructor
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
Assignee|msebor at gcc dot gnu.org |unassigned at gcc dot gnu.org
Known to fail| |7.2.0
Severity|normal |minor
--- Comment #11 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Paul Wankadia from comment #10)
There has been no change since the last comment and I'm not currently working
on it. Since Clang rejects the test case as well I'm also not too inclined to
change GCC to accept the code. (I do note that Intel ICC accepts it, possibly
for compatibility with GCC 5.)
To make this work I would suggest to use a zero-length array instead. That
makes it clear that a GCC-specific extension is being used and it's also
accepted by Clang and ICC.
>From gcc-bugs-return-582111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 17:22:34 2017
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Subject: [Bug testsuite/82951] gcc.c-torture/execute/20040409-1.c undefined behavior
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> Hmm, on RTL signs do not matter. I'd say strip the bogus cases from the
> existing tests and "duplicate" them into new variants using -fwrapv? Thus
> only apply -fwrapv to those cases that need it.
As I mentioned with the patch, the bogus cases are quite inconvenient to
isolate: there are 12 tests, the whole set is run for 12 values, and only a few
tests are invalid for only a few values. So if I move them, I'll move a
superset of the invalid cases (say all tests that are invalid for at least one
value), and then it sounds easier to move all of them to -fwrapv (the testcase
was introduced to test RTL anyway), so that's what I posted. I'll post
something intermediate though since that was asked.
>From gcc-bugs-return-582112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 18:07:56 2017
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Subject: [Bug c++/83040] New: __attribute__((always_inline)) causes internal_compiler_error (segmentation fault)
Date: Sat, 18 Nov 2017 18:07:00 -0000
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Bug ID: 83040
Summary: __attribute__((always_inline)) causes
internal_compiler_error (segmentation fault)
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jj804785 at wcupa dot edu
Target Milestone: ---
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4)
Flags: g++ -fopenmp -ftemplate-depth=1000000 -std=c++17 -O3 -Wall -c
-fmessage-length=0
IDE (Eclipse_Oxygen)
If you remove the __attribute__((always_inline)) the code compiles fine
Code...
#include <iostream>
#include <omp.h>
#include "math.h"
#include "time.h"
#include <stdio.h>
template<int sz, class T>
struct adder {
__attribute__((always_inline)) static void add(T* eval_to, T* a, T* b)
{
eval_to[sz] = a[sz] + b[sz];
adder<sz - 1, T>::add(eval_to, a, b);
}
};
template<class T>
struct adder<0, T> {
static void add(T* eval_to, T* a, T* b) {
eval_to[0] = a[0] + b[0];
}
};
void dumb_add(double* a, double* b, double* c, int sz) {
for (int i = 0; i < sz; ++i) {
a[i] = b[i] + c[i];
}
}
int main() {
const int sz = 60000;
double* a = new double[sz];
double* b = new double[sz];
double* c = new double[sz];
for (int i = 0; i < sz; ++i) {
a[i] = rand();
b[i] = rand();
c[i] = rand();
}
clock_t t;
t = clock();
printf("Calculating...\n");
for (int i = 0; i < 1000; ++i)
adder<sz, double>::add(a, b, c);
t = clock() - t;
printf("It took me %d clicks (%f seconds).\n", t, ((float) t) /
CLOCKS_PER_SEC);
t = clock();
printf("Calculating...\n");
for (int i = 0; i < 1000; ++i)
dumb_add(a, b, c, sz);
t = clock() - t;
printf("It took me %d clicks (%f seconds).\n", t, ((float) t) /
CLOCKS_PER_SEC);
delete[] a;
delete[] b;
delete[] c;
return 0;
}
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Subject: [Bug tree-optimization/83038] warning at random points in the input (array subscript -1 is below array bounds)
Date: Sat, 18 Nov 2017 18:52:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-18
Component|regression |tree-optimization
Summary|[8 regression] warning at |warning at random points in
|random points in the input |the input (array subscript
|(array subscript -1 is |-1 is below array bounds)
|below array bounds) |
Ever confirmed|0 |1
Known to fail| |8.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
I can reproduce the bad location after stripping line directives from the .i
files and compiling the result as a .c file. There are many other warnings so
I suppressed them to reduce the clutter, but they do suggest the reason for the
warning.
$ gcc -O2 -S -Wno-pointer-to-int-cast -Wno-builtin-declaration-mismatch
-Wno-int-to-pointer-cast -Wno-attributes -Warray-bounds -Warray-bounds
pr83038.c
pr83038.c:56415:29: warning: array subscript -1 is below array bounds of
‘DIDEVICEOBJECTINSTANCEW[256] {aka struct DIDEVICEOBJECTINSTANCEW[256]}’
[-Warray-bounds]
DIDEVICEOBJECTINSTANCEW ddo = device->ddo[obj];
^~~
A dump shows that VRP thinks obj is (or might be) negative:
_234: [-INF, -1] EQUIVALENCES: { _148 } (1 elements)
Array bound warning for device_137->ddo[_234]
...
_147 = SendDlgItemMessageW (dialog_25(D), 28, 4108, 18446744073709551615, 2);
_148 = (int) _147;
if (_148 < 0)
goto <bb 39>; [1.19%]
else
goto <bb 26>; [98.81%]
<bb 39> [local count: 21340]:
_234 = ASSERT_EXPR <_148, _148 < 0>;
<bb 25> [local count: 21340]:
# _184 = PHI <-1(39)>
item ={v} {CLOBBER};
_47 = &device_137->ddo[_234];
Negative index values into the last member array (like device->ddo) were not
diagnosed prior to r254830 (due to bug 68325). With the bug resolved, these
kinds of problems are now detected and diagnosed. If struct DeviceData is
changed so that the ddo array is not last, the same warning is emitted even
with GCC 7, with the same poor location. So both the location problem and the
warning are latent issues (i.e., not a regression).
The bad location aside, as some of the other warnings indicate, the source code
in the translation unit takes liberties with conversions between integers (and
pointers) of different sizes. The value of obj (which is an int) is the result
of calling lv_get_cur_item(dialog) which returns a long converted to int.
These conversions tend to cause "trouble," as in trigger warnings due to jump
threading or other optimizations introducing paths that don't apparently exist
in the original source code. If I'm reading the dumps right, this is also what
happens in this case. Sometimes, although not always, these problems can be
prevented by avoiding these kinds of conversions. In this case, changing the
type of both obj and lv_get_cur_item() to long (to match the result of the
SendDlgItemMessageW() function whose result lv_get_cur_item() returns) prevents
jump threading from inserting a path along which the index is negative and
makes the warning go away.
With that, I can confirm both the poor location and the spurious warning.
>From gcc-bugs-return-582114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 19:57:12 2017
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Subject: [Bug fortran/44292] [libgfortran ABI breakage] Increase internal size of RECL= of the OPEN statement
Date: Sat, 18 Nov 2017 19:57:00 -0000
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL|https://gcc.gnu.org/ml/gcc- |https://gcc.gnu.org/ml/gcc-
|patches/2017-11/msg01563.ht |patches/2017-11/msg01646.ht
|ml |ml
--- Comment #10 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Follow-up patch: https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01646.html
>From gcc-bugs-return-582115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 19:57:13 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83038] warning at random points in the input (array subscript -1 is below array bounds)
Date: Sat, 18 Nov 2017 19:57:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
I should also mention that the warning isn't without merit even if the path
where the index is strictly negative doesn't appear in the source code. As far
as anyone can tell, the array index would be negative if SendDlgItemMessageW
returned a negative value. It's not clear from the MSDN documentation whether
that can ever happen, but since the return type is signed GCC must assume it
can. So at a minimum, the warning points out a potential bug. If the function
can not, in fact, return a negative result, either it or its callers can
prevent the warning (and likely improve the quality of code emitted for its
callers) either by asserting that the value is not negative or by converting it
to an unsigned type (and asserting the result is in bounds of the array into
which it is used to index).
At the same time, the jump threading pass could determine that the path with
the negative index is undefined and avoid inserting it (or rather, replace it
with a trap). That would prevent the warning as it's implemented today, though
it's not entirely clear that suppressing it would be helpful in the event that
the value did end up negative in the end. Then the program would just abort.
IIUC, Jeff's position on this is to both warn and trap. The text of the
warning in that case might be more appropriately phrased as "subscript -1 may
be below array bounds" than "is below bounds."
>From gcc-bugs-return-582116-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 18 20:52:12 2017
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Subject: [Bug c/83011] -Wformat-truncation wrongly computes length (depends on the position of numbers in the addition)
Date: Sat, 18 Nov 2017 20:52:00 -0000
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--- Comment #2 from Julien ÉLIE <julien at trigofacile dot com> ---
Created attachment 42644
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42644&action=edit
Preprocessed translation unit of timer.c
Thanks Martin for your response.
I attached the result of the following command:
/home/iulius/work/gcc/gcc-7.2.0/bin/gcc -g -O3 -DDEBUG=1 -Wall -Werror -Wextra
-Wformat=2 -Wformat-overflow=2 -Wformat-truncation=2 -Wnull-dereference
-Winit-self -Wmissing-include-dirs -Wshift-overflow=2 -Wsync-nand
-Wstringop-overflow=4 -Wmissing-format-attribute -Walloc-zero -Walloca
-Wduplicated-cond -Wtrampolines -Wshadow -Wpointer-arith -Wc99-c11-compat
-Wbad-function-cast -Wcast-align -Wwrite-strings -Wdangling-else -Wdate-time
-Wjump-misses-init -Wstrict-prototypes -Wold-style-definition
-Wmissing-prototypes -Wmissing-declarations -Wnormalized=nfc -Wrestrict
-Wnested-externs -Winline -Winvalid-pch -Wvla -Wno-unused-function
-I../include -E timer.c -fPIC -DPIC -o .libs/timer.o
In English, the warning is:
timer.c:395:37: error: ' ' directive output may be truncated writing 1 byte
into a region of size between 0 and 1 [-Werror=format-truncation=]
rc = snprintf(buf, len, "%s ", prefix);
~
timer.c:395:12: note: 'snprintf' output 2 or more bytes (assuming 3) into a
destination of size 1
rc = snprintf(buf, len, "%s ", prefix);
~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I'm not using -flto to build the projet. And, in case it could help, if I add
"-flto" to compiler options, I no longer have the warning. Is it normal?
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Subject: [Bug fortran/44292] [libgfortran ABI breakage] Increase internal size of RECL= of the OPEN statement
Date: Sat, 18 Nov 2017 22:05:00 -0000
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--- Comment #11 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Author: jb
Date: Sat Nov 18 22:05:13 2017
New Revision: 254918
URL: https://gcc.gnu.org/viewcvs?rev=254918&root=gcc&view=rev
Log:
PR 44292 Handle large record lengths
Now that the ABI supports large record lengths, there's a few places
in libgfortran where we need to use larger types. For internal units
which by definition are in-memory, it's enought to use ptrdiff_t, for
external units gfc_offset.
Regtested on x86_64-pc-linux-gnu?
libgfortran/ChangeLog:
2017-11-19 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/44292
* io/transfer.c (skip_record): Use gfc_offset to handle large
records.
(next_record_r): Likewise.
(sset): Likewise.
(next_record_w): Use gfc_offset/ptrdiff_t appropriately.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/transfer.c
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Subject: [Bug tree-optimization/83041] New: redundant assignment from member array not eliminated
Date: Sat, 18 Nov 2017 22:08:00 -0000
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Summary: redundant assignment from member array not eliminated
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GCC eliminates the redundant assignments in f() but not in g(). Other
compilers (IBM XLC and Intel ICC, for example) eliminate them in both
functions.
$ cat c.c && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout c.c
char a[4];
struct A { char a[4]; };
struct B { char a[4], b[4]; };
void f (struct A *p)
{
a[0] = p->a[0];
a[0] = p->a[0]; // not eliminated
a[0] = p->a[0]; // not eliminated
}
void g (struct B *p)
{
a[0] = p->a[0];
a[0] = p->a[0]; // eliminated
a[0] = p->a[0]; // eliminated
}
;; Function f (f, funcdef_no=0, decl_uid=1897, cgraph_uid=0, symbol_order=1)
f (struct A * p)
{
char _1;
char _2;
char _3;
<bb 2> [local count: 10000]:
_1 = p_5(D)->a[0];
a[0] = _1;
_2 = p_5(D)->a[0];
a[0] = _2;
_3 = p_5(D)->a[0];
a[0] = _3;
return;
}
;; Function g (g, funcdef_no=1, decl_uid=1900, cgraph_uid=1, symbol_order=2)
g (struct B * p)
{
char _1;
<bb 2> [local count: 10000]:
_1 = p_3(D)->a[0];
a[0] = _1;
return;
}
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Subject: [Bug fortran/53796] I/O INQUIRE of RECL: If not specified in OPEN, the default value should be returned (sequential access)
Date: Sat, 18 Nov 2017 22:14:00 -0000
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Bug 53796 depends on bug 44292, which changed state.
Bug 44292 Summary: [libgfortran ABI breakage] Increase internal size of RECL= of the OPEN statement
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44292
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
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Subject: [Bug fortran/44292] [libgfortran ABI breakage] Increase internal size of RECL= of the OPEN statement
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #12 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Fixed on trunk, closing. There might still be uses of 32-bit integers for
record lengths in the library (if so, file a new bug or reopen this one), but
the ABI issue and at least the most obvious internal usage should now be fixed.
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Subject: [Bug fortran/56818] [meta-bug] fortran-dev bugs
Date: Sat, 18 Nov 2017 22:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56818
Bug 56818 depends on bug 44292, which changed state.
Bug 44292 Summary: [libgfortran ABI breakage] Increase internal size of RECL= of the OPEN statement
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44292
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/29602] [F2003] I/O specifiers can now be of any kind
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Bug 29602 depends on bug 44292, which changed state.
Bug 44292 Summary: [libgfortran ABI breakage] Increase internal size of RECL= of the OPEN statement
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44292
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug target/82961] [6/7 Regression] ICE in dwarf2out.c: deferred_asm_name != NULL
Date: Sat, 18 Nov 2017 23:31:00 -0000
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--- Comment #9 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Sat Nov 18 23:30:50 2017
New Revision: 254920
URL: https://gcc.gnu.org/viewcvs?rev=254920&root=gcc&view=rev
Log:
[vms] Add missing vmsdbgout_early_finish
2017-11-19 Tom de Vries <tom@codesourcery.com>
PR target/82961
* vmsdbgout.c (vmsdbgout_early_finish): New function.
(vmsdbg_debug_hooks): Set early_finish field to vmsdbgout_early_finish.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/vmsdbgout.c
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Subject: [Bug target/82961] [6/7 Regression] ICE in dwarf2out.c: deferred_asm_name != NULL
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--- Comment #10 from Tom de Vries <vries at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01649.html
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From: "neil.n.carlson at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
Date: Sun, 19 Nov 2017 00:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79072
--- Comment #11 from neil.n.carlson at gmail dot com ---
Paul, I'm organizing all my bug report examples, and ran across these two test
cases from September that I can't find I ever reported. They are VERY similar
to the original example I posted, except the ICE occurs in a different file, so
I thought I'd add them here. I can submit a separate PR if you think it more
appropriate.
The first compiles on 6.4.1, 7.2.1, and 8.0.0 (20171028). But produces an
incorrect result:
b="" (expect "foo")
character(3), target :: a = 'foo'
class(*), pointer :: b
b => ptr()
select type (b)
type is (character(*))
print '(3a)', 'b="', b, '" (expect "foo")'
end select
contains
function ptr()
class(*), pointer :: ptr
ptr => a
end function
end
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From: "neil.n.carlson at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
Date: Sun, 19 Nov 2017 00:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79072
--- Comment #12 from neil.n.carlson at gmail dot com ---
The second adds a select case and print to get at the result value before its
handed back. This produces an ICE with 6.4.1, 7.2.1, and 8.0.0 (20171028)
character(3), target :: a = 'foo'
class(*), pointer :: b
b => ptr()
select type (b)
type is (character(*))
print '(3a)', 'b="', b, '" (expect "foo")'
end select
contains
function ptr()
class(*), pointer :: ptr
ptr => a
select type (ptr)
type is (character(*))
end select
end function
end
Here's the traceback on 7.2.1:
gfortran-bug-20170812b.f90:46:0:
character(3), target :: a = 'foo'
internal compiler error: in gfc_advance_chain, at fortran/trans.c:58
0x65d137 gfc_advance_chain(tree_node*, int)
../../gcc/fortran/trans.c:58
0x685eba gfc_class_len_get(tree_node*)
../../gcc/fortran/trans-expr.c:226
0x6c6364 trans_associate_var
../../gcc/fortran/trans-stmt.c:1778
0x6c6364 gfc_trans_block_construct(gfc_code*)
../../gcc/fortran/trans-stmt.c:1831
0x65d6b7 trans_code
../../gcc/fortran/trans.c:1913
0x6c77d9 gfc_trans_select_type_cases
../../gcc/fortran/trans-stmt.c:2422
0x6c77d9 gfc_trans_select_type(gfc_code*)
../../gcc/fortran/trans-stmt.c:3133
0x65d747 trans_code
../../gcc/fortran/trans.c:1933
0x6c5e38 gfc_trans_block_construct(gfc_code*)
../../gcc/fortran/trans-stmt.c:1824
0x65d6b7 trans_code
../../gcc/fortran/trans.c:1913
0x682847 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6332
0x682634 gfc_generate_contained_functions
../../gcc/fortran/trans-decl.c:5327
0x682634 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6261
0x616eb6 translate_all_program_units
../../gcc/fortran/parse.c:6074
0x616eb6 gfc_parse_file()
../../gcc/fortran/parse.c:6274
0x65a02f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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From: "neil.n.carlson at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
Date: Sun, 19 Nov 2017 00:35:00 -0000
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--- Comment #13 from neil.n.carlson at gmail dot com ---
Correction to Comment 11. That example gives the *correct* result on 6.4.1
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83042] New: [8.0 regression] ICE on valid code
Date: Sun, 19 Nov 2017 00:50:00 -0000
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Bug ID: 83042
Summary: [8.0 regression] ICE on valid code
Product: gcc
Version: 8.0
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Created attachment 42645
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42645&action=edit
File(s) triggering the ICE
The following code ICE's with gfortran:
gfortran -c evaluators.f90
evaluators.f90:1881:0:
mask = int%get_mask ()
internal compiler error: Segmentation fault: 11
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Code example is attached, will try to boil it down more to the essentials.
I believe that it should have been introduced somewhere between r253992 and
r254916.
Just unpack the example and do 'make'.
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Subject: [Bug bootstrap/82091] [5 only] Build failure on macOS 10.13 with Xcode 9
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82091
Jürgen Reuter <juergen.reuter at desy dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |juergen.reuter at desy dot de
--- Comment #4 from Jürgen Reuter <juergen.reuter at desy dot de> ---
I can see this also for trunk r253992:
In file included from ../../gcc/unique-ptr-tests.cc:23:
In file included from ../../gcc/../include/unique-ptr.h:77:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/memory:639:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/stdexcept:250:4:
error: no member named 'fancy_abort' in namespace 'std::__1';
did you mean simply 'fancy_abort'?
_VSTD::abort();
^~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/__config:392:15:
note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
../../gcc/system.h:725:13: note: 'fancy_abort' declared here
extern void fancy_abort (const char *, int, const char *)
^
In file included from ../../gcc/unique-ptr-tests.cc:23:
In file included from ../../gcc/../include/unique-ptr.h:77:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/memory:639:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/stdexcept:261:5:
error: no member named 'fancy_abort' in namespace 'std::__1';
did you mean simply 'fancy_abort'?
_VSTD::abort();
^~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/__config:392:15:
note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
../../gcc/system.h:725:13: note: 'fancy_abort' declared here
extern void fancy_abort (const char *, int, const char *)
^
In file included from ../../gcc/unique-ptr-tests.cc:23:
In file included from ../../gcc/../include/unique-ptr.h:77:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/memory:639:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/stdexcept:272:5:
error: no member named 'fancy_abort' in namespace 'std::__1';
did you mean simply 'fancy_abort'?
_VSTD::abort();
^~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/__config:392:15:
note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
../../gcc/system.h:725:13: note: 'fancy_abort' declared here
extern void fancy_abort (const char *, int, const char *)
^
In file included from ../../gcc/unique-ptr-tests.cc:23:
In file included from ../../gcc/../include/unique-ptr.h:77:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/memory:3698:5:
error: no member named 'fancy_abort' in namespace 'std::__1'; did
you mean simply 'fancy_abort'?
_VSTD::abort();
^~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/__config:392:15:
note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
../../gcc/system.h:725:13: note: 'fancy_abort' declared here
extern void fancy_abort (const char *, int, const char *)
^
5 warnings and 10 errors generated.
make[3]: *** [unique-ptr-tests.o] Error 1
make[2]: *** [all-stage1-gcc] Error 2
make[1]: *** [stage1-bubble] Error 2
>From gcc-bugs-return-582130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 00:57:46 2017
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/82091] [5 only] Build failure on macOS 10.13 with Xcode 9
Date: Sun, 19 Nov 2017 00:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82091
--- Comment #5 from Jürgen Reuter <juergen.reuter at desy dot de> ---
I can see this also for trunk r253992:
In file included from ../../gcc/unique-ptr-tests.cc:23:
In file included from ../../gcc/../include/unique-ptr.h:77:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/memory:639:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/stdexcept:250:4:
error: no member named 'fancy_abort' in namespace 'std::__1';
did you mean simply 'fancy_abort'?
_VSTD::abort();
^~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/__config:392:15:
note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
../../gcc/system.h:725:13: note: 'fancy_abort' declared here
extern void fancy_abort (const char *, int, const char *)
^
In file included from ../../gcc/unique-ptr-tests.cc:23:
In file included from ../../gcc/../include/unique-ptr.h:77:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/memory:639:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/stdexcept:261:5:
error: no member named 'fancy_abort' in namespace 'std::__1';
did you mean simply 'fancy_abort'?
_VSTD::abort();
^~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/__config:392:15:
note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
../../gcc/system.h:725:13: note: 'fancy_abort' declared here
extern void fancy_abort (const char *, int, const char *)
^
In file included from ../../gcc/unique-ptr-tests.cc:23:
In file included from ../../gcc/../include/unique-ptr.h:77:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/memory:639:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/stdexcept:272:5:
error: no member named 'fancy_abort' in namespace 'std::__1';
did you mean simply 'fancy_abort'?
_VSTD::abort();
^~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/__config:392:15:
note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
../../gcc/system.h:725:13: note: 'fancy_abort' declared here
extern void fancy_abort (const char *, int, const char *)
^
In file included from ../../gcc/unique-ptr-tests.cc:23:
In file included from ../../gcc/../include/unique-ptr.h:77:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/memory:3698:5:
error: no member named 'fancy_abort' in namespace 'std::__1'; did
you mean simply 'fancy_abort'?
_VSTD::abort();
^~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/__config:392:15:
note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
../../gcc/system.h:725:13: note: 'fancy_abort' declared here
extern void fancy_abort (const char *, int, const char *)
^
5 warnings and 10 errors generated.
make[3]: *** [unique-ptr-tests.o] Error 1
make[2]: *** [all-stage1-gcc] Error 2
make[1]: *** [stage1-bubble] Error 2
>From gcc-bugs-return-582131-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 01:02:24 2017
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83042] [8.0 regression] ICE on valid code
Date: Sun, 19 Nov 2017 01:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83042
--- Comment #1 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Have to extend the range to r253161 as possible earliest svn version.
>From gcc-bugs-return-582132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 01:02:55 2017
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/78549] [8 Regression] Very slow formatted internal file output
Date: Sun, 19 Nov 2017 01:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78549
--- Comment #24 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
After a minor test tweak.
$ gfc -static pr78549.f
$ time ./a.out
real 0m24.049s
user 0m22.941s
sys 0m0.962s
$ gfc6 -static pr78549.f
$ time ./a.out
real 0m22.838s
user 0m22.718s
sys 0m0.005s
Without the tweak on trunk:
$ gfc -static pr78549.f
$ time ./a.out
real 0m28.916s
user 0m27.697s
sys 0m1.024s
With the minor tweak we are still a bit slower than 6, but then we added a few
features since then also, so not too bad. My initial tweak is going to require
a little logic to be added.
Next report will be after I have that sorted out.
>From gcc-bugs-return-582133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 01:16:31 2017
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Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
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--- Comment #14 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The patch at https://gcc.gnu.org/ml/fortran/2017-11/msg00103.html fixes
gfortran for the tests in comment 0, 5 and 11, but not for the test in comment
12:
internal compiler error: tree check: expected record_type or union_type or
qual_union_type, have function_type in gfc_class_len_get, at
fortran/trans-expr.c:226
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83042] [8.0 regression] ICE on valid code
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--- Comment #2 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Shorter version with only 3 files with 189 lines in total. For the ICE to
appear it is important that the modules reside in separate files. (?)
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Subject: [Bug fortran/83042] [8.0 regression] ICE on valid code
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--- Comment #3 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Created attachment 42646
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42646&action=edit
v2 of reproducer, much smaller
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Subject: [Bug fortran/83042] [8.0 regression] ICE on valid code
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--- Comment #4 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Created attachment 42647
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42647&action=edit
v3 of reproducer, still smaller
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Subject: [Bug ipa/83037] [8 Regression] ice in to_sreal_scale, at profile-count.c:275
Date: Sun, 19 Nov 2017 07:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83037
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Fixed by r254919.
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Subject: [Bug tree-optimization/83043] New: FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times graphite "2 loops carried no dependency" 1 (found 0 times)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83043
Bug ID: 83043
Summary: FAIL: libgomp.graphite/force-parallel-1.c
scan-tree-dump-times graphite "2 loops carried no
dependency" 1 (found 0 times)
Product: gcc
Version: 8.0
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Target Milestone: ---
https://gcc.gnu.org/ml/gcc-regression/2017-11/msg00290.html :
...
FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times graphite "2
loops carried no dependency" 1 (found 0 times)
FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times graphite "2
loops carried no dependency" 1 (found 0 times)
FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times optimized
"loopfn" 8 (found 12 times)
FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times optimized
"loopfn" 8 (found 12 times)...
Regressions on trunk at revision 254889 vs revision 254872
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Subject: [Bug fortran/83021] [7/8 Regression] gfortran segfault
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83021
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pault at gcc dot gnu.org
Summary|[7 Regression] gfortran |[7/8 Regression] gfortran
|segfault |segfault
--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Created attachment 42636 [details]
> Correct testcase
Thanks. If the two files are merged in one, the ICE is gone.
Bisecting the 7 branch points to revision r254429 (pr81447 and pr82783), thus
r254427 for trunk.
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Subject: [Bug tree-optimization/83043] FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times graphite "2 loops carried no dependency" 1 (found 0 times)
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--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 42649
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42649&action=edit
force-parallel-1.c.154t.parloops2
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Subject: [Bug tree-optimization/83043] FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times graphite "2 loops carried no dependency" 1 (found 0 times)
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 42648
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42648&action=edit
force-parallel-1.c.150t.graphite
instead of "2 loops carried no dependency" 1 we have:
...
$ grep loops force-parallel-1.c.150t.graphite
0 loops carried no dependency.
0 loops carried no dependency.
0 loops carried no dependency.
...
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Subject: [Bug tree-optimization/83043] FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times graphite "2 loops carried no dependency" 1 (found 0 times)
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--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 42650
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42650&action=edit
force-parallel-1.c.228t.optimized
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83021] [7/8 Regression] gfortran segfault in polymorphic assignment
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8 Regression] gfortran |[7/8 Regression] gfortran
|segfault |segfault in polymorphic
| |assignment
--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Reduced test case
module global_field_module
use local_field_module, only : local_field
implicit none
private
public :: global_field
type global_field
private
real, allocatable :: values(:)[:]
contains
procedure, private :: assign_local_field
generic :: assignment(=) => assign_local_field
end type
real :: dx
integer, allocatable :: num_local_points
integer, parameter:: num_end_points=2
real :: boundary_vals(num_end_points)
contains
subroutine assign_local_field(lhs,rhs)
class(global_field), intent(inout) :: lhs
class(local_field), intent(in) :: rhs
lhs%values(:) = rhs%state()
call synchronize()
end subroutine
end module
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83043
Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at ucw dot cz
--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
Regressing commit: r254888.
...
commit 7ae0128a031e2fd2f324f3853560f10e604c1812
Author: hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri Nov 17 17:47:36 2017 +0000
* predict.c (determine_unlikely_bbs): Set cgraph node count to 0
when entry block was promoted unlikely.
(estimate_bb_frequencies): Increase frequency scale.
* profile-count.h (profile_count): Export precision info.
* gcc.dg/tree-ssa/dump-2.c: Fixup template for profile precision
changes.
* gcc.dg/tree-ssa/pr77445-2.c: Fixup template for profile precision
changes.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@254888
138bc75d-0d04-0410-961f-82ee72b054a4
...
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Subject: [Bug c/83044] New: ice in contains_struct_check
Date: Sun, 19 Nov 2017 10:00:00 -0000
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Bug ID: 83044
Summary: ice in contains_struct_check
Product: gcc
Version: 8.0
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For the following C code, compiled by recent gcc trunk and flags
-std=gnu89 -Wall -O2 -c
struct a {
int aeadctx[0]
};
struct b {
struct a c[0]
} d() {
struct b a;
e(a.c->aeadctx);
}
I get
during GIMPLE pass: vrp
bug397-min.c:6:3: internal compiler error: Segmentation fault
} d() {
^
0xd3c34f crash_signal
../../trunk/gcc/toplev.c:325
0x730c44 contains_struct_check(tree_node const*, tree_node_structure_enum, char
const*, int, char const*)
../../trunk/gcc/tree.h:3459
0x730c44 wi::to_wide(tree_node const*)
../../trunk/gcc/tree.h:5247
0xf7c67d vrp_prop::check_array_ref(unsigned int, tree_node*, bool)
../../trunk/gcc/tree-vrp.c:4811
The bug seems to occur between revisions 254826 and 254877
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Subject: [Bug fortran/83042] [7/8 regression] ICE on valid code
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-19
CC| |pault at gcc dot gnu.org
Summary|[8.0 regression] ICE on |[7/8 regression] ICE on
|valid code |valid code
Ever confirmed|0 |1
--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Could be a duplicate of pr83021: the ICE is gone if I merge the files in one
and the ICE appears in the same range.
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Subject: [Bug fortran/83021] [7/8 Regression] gfortran segfault in polymorphic assignment
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Priority|P3 |P4
Known to fail| |8.0
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Subject: [Bug fortran/83021] [7/8 Regression] gfortran segfault in polymorphic assignment
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
CC| |juergen.reuter at desy dot de
--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 83042 has been marked as a duplicate of this bug. ***
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Subject: [Bug fortran/83042] [7/8 regression] ICE on valid code
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Could be a duplicate of pr83021: the ICE is gone if I merge the files
> in one and the ICE appears in the same range.
The ICE appears at r254428 on the 7 branch. Marked as duplicate.
*** This bug has been marked as a duplicate of bug 83021 ***
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/65381] [6/7/8 Regression] ICE during array result, assignment
Date: Sun, 19 Nov 2017 10:44:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|RESOLVED |REOPENED
Last reconfirmed| |2017-11-19
Known to work| |5.5.0
Resolution|DUPLICATE |---
Summary|ICE during array result, |[6/7/8 Regression] ICE
|assignment |during array result,
| |assignment
Ever confirmed|0 |1
Known to fail| |6.4.0, 7.2.0, 8.0
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Duplicate of pr54070.
Compiling the original test with gfortran 6 up to trunk gives the ICE
pr65381.f90:38:0:
strings(:) = fixedStringTable(this)
internal compiler error: Segmentation fault: 11
My instrumented gfortran gives in addition
../../work/gcc/tree.h:3125:7: runtime error: member access within null pointer
of type 'union tree_node'
The code compiles if I replace
class(StringTable), intent(IN) :: this(:)
with
type(StringTable), intent(IN) :: this(:)
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Subject: [Bug fortran/82923] Automatic allocation of deferred length character using function result
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Created attachment 42637 [details]
> Fix for the bug
>
> This one does the job and it regtests OK.
Confirmed, however I see an ICE when compiling the "type" variant of pr65381.
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Subject: [Bug target/82961] [6/7 Regression] ICE in dwarf2out.c: deferred_asm_name != NULL
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--- Comment #11 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 42651
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42651&action=edit
backport to 6 branch
The patch committed to trunk applies cleanly to gcc-7-branch, but not the
gcc-6-branch. This version of the patch applies to the gcc-6-branch.
Given the lack of build and test, I'm not committing these backports, but I'm
waiting for a go ahead from the vms maintainers (ideally with a confirmation of
build & test) or branch maintainers.
>From gcc-bugs-return-582153-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 11:41:25 2017
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Subject: [Bug other/81712] gcc does not compile when using glib 2.26 (everything works fine with 2.25)
Date: Sun, 19 Nov 2017 11:41:00 -0000
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--- Comment #8 from Mikael Pettersson <mikpelinux at gmail dot com> ---
The fix was backported to gcc-6-branch in r249957 and to gcc-5-branch in
r249958. So it's included in gcc-5.5.0 and will be included in gcc-6.5.0.
>From gcc-bugs-return-582154-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 11:50:31 2017
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Subject: [Bug other/81334] -Wmisleading-indentation prints notes about being disabled even when already intentionally ignored
Date: Sun, 19 Nov 2017 11:50:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #2)
> It should be a matter of checking for warn_misleading_indentation at
> c-family/c-indentation.c:get_visual_column()
Oh, I guess if we already know where the fix needs to go, that's a confirmation
of the bug
>From gcc-bugs-return-582155-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 12:17:09 2017
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83045] New: -Wreturn-type regression in C++
Date: Sun, 19 Nov 2017 12:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83045
Bug ID: 83045
Summary: -Wreturn-type regression in C++
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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Created attachment 42652
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42652&action=edit
rt.c
... starting with r254437 "Instrument function exit with __builtin_unreachable
in C++" (assuming that I bisected that correctly).
For "-Wreturn-type -x c" compilation of the attached rt.c, we see:
[...]/rt.c: In function 'test1':
[...]/rt.c:6:1: warning: control reaches end of non-void function
[-Wreturn-type]
}
^
[...]/rt.c: In function 'test2':
[...]/rt.c:13:1: warning: control reaches end of non-void function
[-Wreturn-type]
}
^
... whereas for "-Wreturn-type -x c++" compilation, we now only see:
[...]/rt.c: In function 'int test1(int)':
[...]/rt.c:6:1: warning: no return statement in function returning non-void
[-Wreturn-type]
}
^
..., but used to see (and with r254437 reverted again see):
[...]/rt.c: In function 'int test1(int)':
[...]/rt.c:6:1: warning: no return statement in function returning non-void
[-Wreturn-type]
}
^
[...]/rt.c: In function 'int test2(int)':
[...]/rt.c:13:1: warning: control reaches end of non-void function
[-Wreturn-type]
}
^
>From gcc-bugs-return-582156-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 12:22:08 2017
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Subject: [Bug c++/83046] New: ICE in nvptx offloading, C++ compilation of libgomp.oacc-c-c++-common/gang-static-2.c
Date: Sun, 19 Nov 2017 12:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83046
Bug ID: 83046
Summary: ICE in nvptx offloading, C++ compilation of
libgomp.oacc-c-c++-common/gang-static-2.c
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
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CC: marxin at gcc dot gnu.org
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... starting with r254437 "Instrument function exit with __builtin_unreachable
in C++".
Program received signal SIGSEGV, Segmentation fault.
input_offload_tables (do_force_output=true) at
[...]/source-gcc/gcc/lto-cgraph.c:1942
1942 varpool_node::get (var_decl)->force_output = 1;
(gdb) bt
#0 input_offload_tables (do_force_output=true) at
[...]/source-gcc/gcc/lto-cgraph.c:1942
#1 0x00000000005a0927 in read_cgraph_and_symbols (fnames=<optimized out>,
nfiles=<optimized out>) at [...]/source-gcc/gcc/lto/lto.c:2863
#2 lto_main () at [...]/source-gcc/gcc/lto/lto.c:3314
#3 0x0000000000a7f63f in compile_file () at
[...]/source-gcc/gcc/toplev.c:455
#4 0x000000000056ef20 in do_compile () at
[...]/source-gcc/gcc/toplev.c:2059
#5 toplev::main (this=this@entry=0x7fffffffcfb0, argc=argc@entry=15,
argv=0x17908e0, argv@entry=0x7fffffffd0b8) at
[...]/source-gcc/gcc/toplev.c:2194
#6 0x0000000000571457 in main (argc=15, argv=0x7fffffffd0b8) at
[...]/source-gcc/gcc/main.c:39
Obviously, that test case has a "-Wreturn-type mismatch" (which is not
diagnosed for C++; see reduced PR83045), and fixing that cures this nvptx
offloading ICE.
>From gcc-bugs-return-582157-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 12:22:43 2017
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Subject: [Bug c++/83046] ICE in nvptx offloading, C++ compilation of libgomp.oacc-c-c++-common/gang-static-2.c
Date: Sun, 19 Nov 2017 12:22:00 -0000
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-19
Ever confirmed|0 |1
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
I suggest we first analyze PR83045.
>From gcc-bugs-return-582158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 12:27:53 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83046] ICE in nvptx offloading, C++ compilation of libgomp.oacc-c-c++-common/gang-static-2.c
Date: Sun, 19 Nov 2017 12:27:00 -0000
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--- Comment #2 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Also, for "-foffload=disable -x c++" we now run into:
/tmp/ccAXdy3B.o:(.gnu.offload_funcs+0x0): undefined reference to
`main._omp_fn.7'
/tmp/ccAXdy3B.o:(.gnu.offload_funcs+0x8): undefined reference to
`main._omp_fn.6'
/tmp/ccAXdy3B.o:(.gnu.offload_funcs+0x10): undefined reference to
`main._omp_fn.5'
/tmp/ccAXdy3B.o:(.gnu.offload_funcs+0x18): undefined reference to
`main._omp_fn.4'
/tmp/ccAXdy3B.o:(.gnu.offload_funcs+0x20): undefined reference to
`main._omp_fn.3'
/tmp/ccAXdy3B.o:(.gnu.offload_funcs+0x28): undefined reference to
`main._omp_fn.2'
/tmp/ccAXdy3B.o:(.gnu.offload_funcs+0x30): undefined reference to
`main._omp_fn.1'
collect2: error: ld returned 1 exit status
..., which also suggests some C++ front end/middle end offloading
inconsistency.
>From gcc-bugs-return-582159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 12:36:45 2017
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/82784] Remove semicolon after "do {} while (0)" macros
Date: Sun, 19 Nov 2017 12:36:00 -0000
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--- Comment #15 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 42653
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42653&action=edit
conformance scan results
Output from command:
$ rm -f OUTPUT; for f in $(find . | egrep -v '\.git|/testsuite/'); do echo $f;
( perl -p -e 's/\\\n//' $f| egrep "#.*define.*while \((false|0)\);"); done |
grep -B1 'while (' > OUTPUT
The gcc/read-rtl-function.c, gcc/print-rtl-function.c and
./gcc/config/arc/arc.c are short-lived macros in combination with .def files.
We could replace "do { ... } while (0)" with "{ ... }" but I'm not sure yet
what the right approach is here.
I've submitted the libgcc/config/alpha/vms-unwind.h one (
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01661.html ) .
I've just fixed the gcc/config/arc/arc.h one (
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01663.html ).
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Subject: [Bug tree-optimization/83047] New: [8 regression] glibc/crypt/crypt_util.c gets miscompiled
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83047
Bug ID: 83047
Summary: [8 regression] glibc/crypt/crypt_util.c gets
miscompiled
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
CC: jsm28 at gcc dot gnu.org
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Glibc's crypt/crypt_util.c gets miscopmiled with gcc-8:
markus@x4 ~ % LD_PRELOAD=/var/tmp/glibc-build/crypt/libcrypt.so gdb
/var/tmp/glibc-build/crypt/badsalttest
Reading symbols from /var/tmp/glibc-build/crypt/badsalttest...done.
(gdb) run
Starting program: /home/markus/tmp/glibc-build/crypt/badsalttest
[New process 1418]
Thread 2.1 "badsalttest" received signal SIGSEGV, Segmentation fault.
[Switching to process 1418]
0x00007ffff7b9ecd9 in _ufc_setup_salt_r (s=s@entry=0x7ffff7ff3fff "*",
__data=__data@entry=0x7ffff7db2160 <_ufc_foobar>) at crypt_util.c:612
612 s0 = s[0];
(gdb) bt
#0 0x00007ffff7b9ecd9 in _ufc_setup_salt_r (s=s@entry=0x7ffff7ff3fff "*",
__data=__data@entry=0x7ffff7db2160 <_ufc_foobar>) at crypt_util.c:612
#1 0x00007ffff7b9bf2f in __crypt_r (key=0x401e32 "end of page",
salt=0x7ffff7ff3fff "*", data=0x7ffff7db2160 <_ufc_foobar>) at
crypt-entry.c:109
#2 0x00000000004012b2 in do_test () at badsalttest.c:66
#3 0x0000000000401c1f in run_test_function (config=0x7fffffffe240,
config=0x7fffffffe240, argv=0x7fffffffe378, argc=<optimized out>) at
support_test_main.c:158
#4 support_test_main (argc=<optimized out>, argv=0x7fffffffe378,
config=config@entry=0x7fffffffe240) at support_test_main.c:349
#5 0x00000000004010d9 in main (argc=<optimized out>, argv=<optimized out>) at
../support/test-driver.c:164
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Subject: [Bug tree-optimization/83047] [8 regression] glibc/crypt/crypt_util.c gets miscompiled
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--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 42654
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42654&action=edit
unreduced testcase
>From gcc-bugs-return-582162-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 13:03:26 2017
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Subject: [Bug tree-optimization/83047] [8 regression] glibc/crypt/crypt_util.c gets miscompiled
Date: Sun, 19 Nov 2017 13:03:00 -0000
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--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 crypt % gcc --save-temps crypt_util.c -c -std=gnu11 -O2 -Wall -Wundef
-Wwrite-strings -fmerge-all-constants -fno-stack-protector -frounding-math -g
-pipe -Wstrict-prototypes -Wold-style-definition -fPIC -I../include
-I/var/tmp/glibc-build/crypt -I/var/tmp/glibc-build
-I../sysdeps/unix/sysv/linux/x86_64/64 -I../sysdeps/unix/sysv/linux/x86_64
-I../sysdeps/unix/sysv/linux/x86 -I../sysdeps/x86/nptl
-I../sysdeps/unix/sysv/linux/wordsize-64 -I../sysdeps/x86_64/nptl
-I../sysdeps/unix/sysv/linux/include -I../sysdeps/unix/sysv/linux
-I../sysdeps/nptl -I../sysdeps/pthread -I../sysdeps/gnu -I../sysdeps/unix/inet
-I../sysdeps/unix/sysv -I../sysdeps/unix/x86_64 -I../sysdeps/unix
-I../sysdeps/posix -I../sysdeps/x86_64/64 -I../sysdeps/x86_64/fpu
-I../sysdeps/x86/fpu/include -I../sysdeps/x86/fpu -I../sysdeps/x86_64
-I../sysdeps/x86 -I../sysdeps/ieee754/float128
-I../sysdeps/ieee754/ldbl-96/include -I../sysdeps/ieee754/ldbl-96
-I../sysdeps/ieee754/dbl-64/wordsize-64 -I../sysdeps/ieee754/dbl-64
-I../sysdeps/ieee754/flt-32 -I../sysdeps/wordsize-64 -I../sysdeps/ieee754
-I../sysdeps/generic -I.. -I../libio -I. -nostdinc -isystem
/usr/lib/gcc/x86_64-pc-linux-gnu/8.0.0/include -isystem
/usr/lib/gcc/x86_64-pc-linux-gnu/8.0.0/include-fixed -isystem /usr/include
-D_LIBC_REENTRANT -include /var/tmp/glibc-build/libc-modules.h
-DMODULE_NAME=libcrypt -include ../include/libc-symbols.h -DPIC -DSHARED
-DTOP_NAMESPACE=glibc -o /var/tmp/glibc-build/crypt/crypt_util.os -MD -MP -MF
/var/tmp/glibc-build/crypt/crypt_util.os.dt -MT
/var/tmp/glibc-build/crypt/crypt_util.os
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Subject: [Bug other/82784] Remove semicolon after "do {} while (0)" macros
Date: Sun, 19 Nov 2017 13:11:00 -0000
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #16 from Tom de Vries <vries at gcc dot gnu.org> ---
Total cleanup:
...
fadadb9 [arc] Remove semicolon after do while (0) in FUNCTION_PROFILER
70b53a9 [phoenix] Remove semicolon after do {} while (0) in
TARGET_OS_CPP_BUILTINS
ab81ab7 [visium] Remove semicolon after ASM_OUTPUT_CASE_END
762da9e [ft32, spu] Remove semicolon after do {} while (0) in
REGISTER_TARGET_PRAGMAS
0fc1fb0 [mcore] Remove semicolon after do {} while (0) in MCORE_EXPORT_NAME
45fe1f4 Remove semicolon after ASM_OUTPUT_ASCII
6665982 [cr16, powerpcspe, rs6000] Remove semicolon after ASM_OUTPUT_LABELREF
macro body
4a190f0 [mips] Remove semicolon after do {} while (0) in ASM_OUTPUT_CASE_END
3a999d8 [powerpcspe] Remove semicolon after do {} while (0) in
SUBTARGET_OVERRIDE_OPTIONS
cf10ab9 [rs6000] Remove semicolon after do {} while (0) in
SUBTARGET_OVERRIDE_OPTIONS
bdcb436 [libgcc, rs6000] Remove semicolon after do {} while (0) in
REGISTER_CFA_OFFSET_FOR
47d88ce [arm] Remove semicolon after while {} do (0) in
HANDLE_NARROW_SHIFT_ARITH
1ad21ae [libgcc] Remove semicolon after do {} while (0) in FP_HANDLE_EXCEPTIONS
2467912 Remove semicolon after do {} while (0) in DEF_SANITIZER_BUILTIN
0882c4f [libcpp] Remove semicolon after do {} while (0) in BUF_APPEND
6394b15 Remove semicolon after ASM_OUTPUT_BEFORE_CASE_LABEL macro body
0944531 [fortran] Remove semicolon after do {} while (0) in match macros
fa57650 [graphite] Remove semicolon after do {} while (0) in DEBUG_PRINT
06555bd [libquadmath] Remove semicolon after do {} while (0) in
MPN_MUL_N_RECURSE
1672bf6 [libsanitizer] Remove semicolon after do {} while (0) in macro body
cace945 Remove semicolon after do {} while (false) in HSA_LOG
...
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Subject: [Bug other/83048] New: wrap multi-statement macros in do {} while (0)
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Bug ID: 83048
Summary: wrap multi-statement macros in do {} while (0)
Product: gcc
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This command:
...
$ rm -f OUTPUT; for f in $(find . -type f | egrep -v '\.git|/testsuite/'); do
echo $f; ( perl -p -e 's/\\\n//' $f| egrep "^#define.*;.*;$"| egrep -v
'case|break'); done | grep -B1 'define' > OUTPUT
...
finds some candidates for fixing, f.i. in libobjc/class.c:
...
#define CLASS_TABLE_HASH(INDEX, HASH, CLASS_NAME) \
HASH = 0; \
for (INDEX = 0; CLASS_NAME[INDEX] != '\0'; INDEX++) \
{ \
HASH = (HASH << 4) ^ (HASH >> 28) ^ CLASS_NAME[INDEX]; \
} \
\
HASH = (HASH ^ (HASH >> 10) ^ (HASH >> 20)) & CLASS_TABLE_MASK;
...
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Already done:
7fbc9a6 [riscv] Wrap ASM_OUTPUT_LABELREF in do {} while (0)
df82c70 [mips] Wrap ASM_OUTPUT_LABELREF in do {} while (0)
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I am mostly done with my tuning overhaul for core+ and znver and
I plan to work on generic now in early stage3. My rough plan is
- drop flags that are there for benefit of anything earlier than core2 and
buldozer
- base costs of instructions on Haswell (and later)+ZNver1 latencies, keep in
mind buldozers.
- revisit code alignment strategies. It seems to me that by default we align
way too much for both core and Zen. Maybe code alignment does not pay back at
all for -O2 and should be done at -Ofast only or so.
- switch instruction scheduling to more modern chip (currently we schedule for
K8). Here I need to figure out how much core based chips care about particular
scheduler model, but I suspect both core and Zen are quite neutral here and
mostly benefit from basic scheduling for latencies.
- figure out best vectorization model - here AVX may be a fun, because core
and znver preffers different kind of codegen.
Ideas are welcome.
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Subject: [Bug ipa/82903] [8 regression] gcc.dg/tree-prof/20050826-2.c fail
Date: Sun, 19 Nov 2017 14:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82903
Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I believe I fixed this bug already and reports from Andreas' tester seems
clean.
>From gcc-bugs-return-582168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 14:23:35 2017
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Subject: [Bug c++/83049] New: Allow overloading of ?: conditional operator
Date: Sun, 19 Nov 2017 14:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83049
Bug ID: 83049
Summary: Allow overloading of ?: conditional operator
Product: gcc
Version: 7.2.0
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C++ standard states than conditional operator ?: cannot be overloaded. However
things changed since this rule was created, and now there are reasons to do
this - in fact gcc provided overloaded version of this operator for vector
extensions. Ability to overload it may be useful in user code too.
One example: in the past I crested small library which was wrapping various
SIMD instructions (SSE, AVX, NEON, and scalars as a pseudo-vector with 1
element). It provided types and defines like this:
template <typename SIMDTraits>
class SIMDVector;
struct SSEDoubleTraits;
#ifdef __SSE2__
typedef SIMDVector<SSEDoubleTraits> DoubleVector;
#define HAS_DOUBLE_VECTOR_2 1
#define DOUBLE_VECTOR_SIZE 2
#endif
With code like above, I was able to abstract out all SIMD stuff and use
DoubleVector in code which performed actual calculations. Ability to overload
?: operator in SIMDVector<> would be helpful and make code more natural.
>From gcc-bugs-return-582169-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 14:38:38 2017
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Subject: [Bug c++/83050] New: Please provide shortcircuit attribute for || and && operators
Date: Sun, 19 Nov 2017 14:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83050
Bug ID: 83050
Summary: Please provide shortcircuit attribute for || and &&
operators
Product: gcc
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Built-int || and && operators are shortcircuiting, i.e. they may skip
evaluation of 2nd argument in some cases. However overloaded || and &&
operators do not work in this way, they always evaluate both arguments.
Sometimes it would be handy if they also could support shortcircuiting. I
propose to add new shortcircuit attribute, which could be attached to
overloaded operator:
__attribute__((shortcircuit)) T1 operator||(T2 a, T3 b);
__attribute__((shortcircuit)) T1 operator&&(T2 a, T3 b);
With such attribute gcc would generate a bit different code, e.g. something
like this:
|| operator:
if ((bool)a)
(T1)a;
else
operator||(a, b);
&& operator:
if ((bool)a)
operator&&(a, b);
else
(T1)a;
This new attribute potentially could also be attached to other overloaded
operators (+, -, ...), but I have doubts if gcc should accept this - probably
it would be better to prohibit this.
>From gcc-bugs-return-582170-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 14:43:40 2017
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Subject: [Bug c++/83049] Allow overloading of ?: conditional operator
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--- Comment #1 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
If you decide to implement this, please also attempt to add this as an feature
to some future version of C++ standard. By doing so users of other compilers
would benefit from this too.
>From gcc-bugs-return-582171-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 14:46:52 2017
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Subject: [Bug rtl-optimization/82849] [8 Regression] ICE on valid code since r254379
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--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Patch posted.
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01668.html
>From gcc-bugs-return-582172-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 14:48:47 2017
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Subject: [Bug target/82852] [8 regression] i386/vect-unpack-1.c, i386/avx512f-gather-2.c, i386/avx256-unaligned-store-2.c fails
Date: Sun, 19 Nov 2017 14:48:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-19
Ever confirmed|0 |1
--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I get
$ grep "vect-unpack-1" `find . -name "*.sum"`
./testsuite/gcc/gcc.sum:PASS: gcc.target/i386/vect-unpack-1.c (test for excess
errors)
./testsuite/gcc/gcc.sum:PASS: gcc.target/i386/vect-unpack-1.c execution test
./testsuite/gcc/gcc.sum:PASS: gcc.target/i386/vect-unpack-1.c
scan-assembler-times vpmovzxbw[ \\t]+[^\n]*%zmm 2
So is the problem gone now?
>From gcc-bugs-return-582173-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 14:50:09 2017
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Subject: [Bug target/82851] [8 regression] g++.dg/vect/slp-pr56812.cc, i386/avx2-vpaddq-3.c, i386/avx2-vpsubq-3.c fails
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
These also pass for me on the top of tree. Is the problem gone now?
>From gcc-bugs-return-582174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 14:51:54 2017
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Subject: [Bug tree-optimization/83047] [8 regression] glibc/crypt/crypt_util.c gets miscompiled
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
I suspect that Jakub's store-merging changes are responsible.
-fno-store-merging fixes the problem.
>From gcc-bugs-return-582175-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 14:56:13 2017
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Subject: [Bug target/82713] [8 Regression] ICE in ix86_builtin_vectorization_cost, at config/i386/i386.c:44475
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Created attachment 42655
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42655&action=edit
Patch I am testing.
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Subject: [Bug target/82713] [8 Regression] ICE in ix86_builtin_vectorization_cost, at config/i386/i386.c:44475
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #6 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Mine.
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Subject: [Bug middle-end/83023] branch probabilities pessimize malloc
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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CC| |mliska at suse dot cz
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
We get:
Predictions for bb 2
DS theory heuristics: 53.5%
combined heuristics: 53.5%
pointer (on trees) heuristics of edge 2->3: 70.0%
call heuristics of edge 2->3: 33.0%
We do not know that malloc is likely returning non-NULL, but we predict with
70% that pointer is non-NULL but in the testcase this prediction is overwritten
with call heuristics.
builtin_expect code can be easily extended to handle builtins that likely
return given value. I am adding Martin to CC as this may be part of predictor
retuning this time.
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Subject: [Bug ipa/60243] IPA is slow on large cgraph tree
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--- Comment #18 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Returning MIN(1, count) indeed seems like very good idea to me. We need to
keep those in control :)
I am testing patch for that.
>From gcc-bugs-return-582179-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 15:18:36 2017
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I was able to reproduce it on terbium but it bootstraps fine now. Is the
problem fixed for you?
If not, would it be possible to have -fdump-tree-all-details-blocks
-fdump-ipa-all-details for mismatching object file?
>From gcc-bugs-return-582180-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 15:32:04 2017
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Subject: [Bug target/83008] [performance] Is it better to avoid extra instructions in data passing between loops?
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--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I now get fir first loop:
a.c:6:5: note: Cost model analysis:
Vector inside of loop cost: 1120
Vector prologue cost: 0
Vector epilogue cost: 0
Scalar iteration cost: 328
Scalar outside cost: 0
Vector outside cost: 0
prologue iterations: 0
epilogue iterations: 0
Calculated minimum iters for profitability: 0
a.c:6:5: note: Runtime profitability threshold = 4
a.c:6:5: note: Static estimate profitability threshold = 4
For second lop I get:
a.c:20:5: note: type of def: internal
a.c:20:5: note: mark relevant 1, live 0: sum.0_60 = (unsigned int) sum_102;
a.c:20:5: note: worklist: examine stmt: sum.0_60 = (unsigned int) sum_102;
a.c:20:5: note: vect_is_simple_use: operand sum_102
a.c:20:5: note: def_stmt: sum_102 = PHI <0(6), sum_75(7)>
a.c:20:5: note: type of def: unknown
a.c:20:5: note: Unsupported pattern.
a.c:20:5: note: not vectorized: unsupported use in stmt.
a.c:20:5: note: unexpected pattern.
Is it really that hard to sum values in vector?
The code does not use AVX512 regs at all.
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Subject: [Bug rtl-optimization/37262] Two branches of the same condition being emitted
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--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This is fixed on trunk. I'll bisect it to see if it is worth backporting.
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Subject: [Bug ipa/82957] [8 Regression] ICE: in to_cgraph_frequency, at profile-count.c:251
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Fixed yesterday.
>From gcc-bugs-return-582183-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 15:49:47 2017
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Subject: [Bug other/82925] [8 regression] gcc.dg/tree-ssa/vrp101.c fails starting with r254379
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I get
;; Function main (main, funcdef_no=0, decl_uid=1892, cgraph_uid=0,
symbol_order=1) (executed once)
main ()
{
<bb 2> [local count: 1073741825]:
return 0;
}
which seems fine and vrp101 passes for me, so I am closing.
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Subject: [Bug ipa/82908] [8 regression] gcc.dg/tree-prof/cmpsf-1.c and gcc.dg/tree-prof/20050826-2.c fail starting with r254452
Date: Sun, 19 Nov 2017 15:52:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-testresults/2017-11/msg01671.html seems clean now
and I believe those are fixed.
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Subject: [Bug rtl-optimization/82881] [8 Regression] ICE: in df_compact_blocks, at df-core.c:1729 with -freorder-blocks-algorithm=simple
Date: Sun, 19 Nov 2017 15:54:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
The testcase works for me. I honestly hope it was fixed by one of many fixes in
the area and not just papered around.
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83050] Please provide shortcircuit attribute for || and && operators
Date: Sun, 19 Nov 2017 15:54:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I thought we had a warning about that. Also the semantics become different
with your attribute which I think is going to be even more problematic too.
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Subject: [Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)
Date: Sun, 19 Nov 2017 15:55:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I am aware of this regression. Will take a look into it now.
>From gcc-bugs-return-582188-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 16:01:23 2017
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Subject: [Bug target/82615] [8 Regression] SPEC CPU2006 453.povray ~10% performance deviation with r248863
Date: Sun, 19 Nov 2017 16:01:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Not really no-op, just trying to reduce its scope. Is the regression still
visible after all the profiling fixes?
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Subject: [Bug rtl-optimization/82671] [8 Regression] ICE in cfg_layout_redirect_edge_and_branch, at cfgrtl.c:4412
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
The testcase works for me now, but I think we need to update loop optimizer
init to preserve partitioning info?
>From gcc-bugs-return-582190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 16:13:12 2017
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Subject: [Bug target/82682] [8 Regression] FAIL: gcc.target/i386/pr50038.c scan-assembler-times movzbl 2 (found 3 times) since r253958
Date: Sun, 19 Nov 2017 16:13:00 -0000
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
We now generate:
.L3:
movzbl (%edx), %esi
addl $2, %edx
addl $1, %ecx
movzbl -1(%edx), %eax
movl %esi, %ebx
imull $38470, %eax, %eax
movzbl %bl, %esi
imull $19595, %esi, %esi
addl %esi, %eax
sarl $16, %eax
movb %al, -1(%ecx)
cmpl %edi, %edx
jne .L3
while from older gcc I get
.L3:
movzbl (%ecx,%edx,2), %eax
movzbl 1(%ecx,%edx,2), %edi
imull $19595, %eax, %eax
imull $38470, %edi, %edi
addl %edi, %eax
sarl $16, %eax
movb %al, (%esi,%edx)
addl $1, %edx
cmpl %edx, %ebx
jne .L3
.L1:
There is clearly missed optimization on movzbl $bl, esi because it is already
extended.
I wonder how this can be triggered by the move cost changes, perhaps regalloc
difference?
Jakub, it is easy for you to get .s files from r253958 and just before?
>From gcc-bugs-return-582191-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 16:15:38 2017
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Subject: [Bug rtl-optimization/82290] [8 Regression] ICE at -O2 on x86_64-linux-gnu: verify_flow_info failed
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Works for me now.
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Subject: [Bug target/82281] Bulldozer/Zen tuning: uses XMM for single 64-bit integer AND, even with a simple mask
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Fixed by the tuning update. I will add testcase.
>From gcc-bugs-return-582193-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 16:23:35 2017
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Subject: [Bug middle-end/81812] [7/8 Regression] Empty virtual function fails to compile
Date: Sun, 19 Nov 2017 16:23:00 -0000
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--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I think we should just mark such thunks as not inlinable in compute_fn_summary.
PPatch is OK with that change.
Thanks!
Honza
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Subject: [Bug rtl-optimization/82671] [8 Regression] ICE in cfg_layout_redirect_edge_and_branch, at cfgrtl.c:4412
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 81791 ***
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Subject: [Bug rtl-optimization/81791] [8 Regression] ICE in cfg_layout_redirect_edge_and_branch, at cfgrtl.c:4422
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--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
*** Bug 82671 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-582196-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 16:26:09 2017
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Subject: [Bug rtl-optimization/81791] [8 Regression] ICE in cfg_layout_redirect_edge_and_branch, at cfgrtl.c:4422
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Testcase works again but the unerlying problem of loop optimizer not preserving
partitioning is not solved.
>From gcc-bugs-return-582197-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 16:28:01 2017
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Subject: [Bug c++/81668] LTO ODR warnings are not helpful
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--- Comment #10 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Problem is that we do not have location info that would say us the origin.
I have sent patch to add location info into TRANSLATION_UNIT_DECL some time ago
(at least a year) but I do not think it was approved.
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Subject: [Bug c++/81668] LTO ODR warnings are not helpful
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--- Comment #11 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I will try to recover that patch.
>From gcc-bugs-return-582199-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 16:30:50 2017
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Subject: [Bug ipa/81360] [8 Regression] ice in estimate_edge_growth, at ipa-inline.h:86
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--- Comment #6 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Will take a look
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Subject: [Bug ipa/81133] [8 Regression] PGO/LTO bootstrap: ICE: in inline_small_functions, at ipa-inline.c:1891
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--- Comment #9 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I have disabled the sanity check because it is too bothered by roundoff errors,
so this is "fixed".
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Subject: [Bug bootstrap/81033] [8 Regression] Revision r249019 breaks bootstrap on darwin
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--- Comment #27 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Is this fixed now?
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Subject: [Bug target/80313] -march=znver1 produce worse code than -march=haswell
Date: Sun, 19 Nov 2017 16:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80313
Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Fixed on trunk.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/81033] [8 Regression] Revision r249019 breaks bootstrap on darwin
Date: Sun, 19 Nov 2017 16:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81033
--- Comment #28 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Bootstrap is fixed, but the fix did not please to Iain Sandoe.
Dominique
> Le 19 nov. 2017 à 17:40, hubicka at gcc dot gnu.org <gcc-bugzilla@gcc.gnu.org> a écrit :
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81033
>
> --- Comment #27 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
> Is this fixed now?
>
> --
> You are receiving this mail because:
> You reported the bug.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/69960] "initializer element is not constant"
Date: Sun, 19 Nov 2017 17:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69960
--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sun Nov 19 17:17:01 2017
New Revision: 254930
URL: https://gcc.gnu.org/viewcvs?rev=254930&root=gcc&view=rev
Log:
PR c/66618
PR c/69960
c-family/
* c-common.h (c_fully_fold): Add LVAL argument defaulted to false.
c/
* c-parser.c (c_parser_omp_atomic): Pass true as LVAL to c_fully_fold
where needed.
* c-typeck.c (build_unary_op, build_modify_expr, build_asm_expr,
handle_omp_array_sections): Likewise.
(digest_init): Don't call decl_constant_value_for_optimization.
* c-tree.h (decl_constant_value_for_optimization): Removed.
* c-fold.c (c_fold_array_ref): New function.
(c_fully_fold_internal): Add LVAL argument, propagate it through
recursive calls. For VAR_P call decl_constant_value and
unshare if not LVAL and either optimizing or IN_INIT. Remove
decl_constant_value_for_optimization calls. If IN_INIT and not LVAL,
fold ARRAY_REF with STRING_CST and INTEGER_CST operands.
(c_fully_fold): Add LVAL argument, pass it through to
c_fully_fold_internal.
(decl_constant_value_for_optimization): Removed.
cp/
* cp-gimplify.c (c_fully_fold): Add LVAL argument, call
cp_fold_maybe_rvalue instead of cp_fold_rvalue and pass it !LVAL.
testsuite/
* gcc.dg/pr69960.c: New test.
* gcc.dg/pr66618.c: New test.
* gcc.dg/pr66618-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr66618-2.c
trunk/gcc/testsuite/gcc.dg/pr66618.c
trunk/gcc/testsuite/gcc.dg/pr69960.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.h
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-fold.c
trunk/gcc/c/c-parser.c
trunk/gcc/c/c-tree.h
trunk/gcc/c/c-typeck.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/testsuite/ChangeLog
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/66618] Failure to diagnose non-constant initializer for static object with -O1
Date: Sun, 19 Nov 2017 17:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66618
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sun Nov 19 17:17:01 2017
New Revision: 254930
URL: https://gcc.gnu.org/viewcvs?rev=254930&root=gcc&view=rev
Log:
PR c/66618
PR c/69960
c-family/
* c-common.h (c_fully_fold): Add LVAL argument defaulted to false.
c/
* c-parser.c (c_parser_omp_atomic): Pass true as LVAL to c_fully_fold
where needed.
* c-typeck.c (build_unary_op, build_modify_expr, build_asm_expr,
handle_omp_array_sections): Likewise.
(digest_init): Don't call decl_constant_value_for_optimization.
* c-tree.h (decl_constant_value_for_optimization): Removed.
* c-fold.c (c_fold_array_ref): New function.
(c_fully_fold_internal): Add LVAL argument, propagate it through
recursive calls. For VAR_P call decl_constant_value and
unshare if not LVAL and either optimizing or IN_INIT. Remove
decl_constant_value_for_optimization calls. If IN_INIT and not LVAL,
fold ARRAY_REF with STRING_CST and INTEGER_CST operands.
(c_fully_fold): Add LVAL argument, pass it through to
c_fully_fold_internal.
(decl_constant_value_for_optimization): Removed.
cp/
* cp-gimplify.c (c_fully_fold): Add LVAL argument, call
cp_fold_maybe_rvalue instead of cp_fold_rvalue and pass it !LVAL.
testsuite/
* gcc.dg/pr69960.c: New test.
* gcc.dg/pr66618.c: New test.
* gcc.dg/pr66618-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr66618-2.c
trunk/gcc/testsuite/gcc.dg/pr66618.c
trunk/gcc/testsuite/gcc.dg/pr69960.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.h
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-fold.c
trunk/gcc/c/c-parser.c
trunk/gcc/c/c-tree.h
trunk/gcc/c/c-typeck.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/testsuite/ChangeLog
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/82962] valgrind reports "Conditional jump or move depends on uninitialised value" in EXECUTE_COMMAND_LINE
Date: Sun, 19 Nov 2017 18:06:00 -0000
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--- Comment #5 from janus at gcc dot gnu.org ---
(In reply to janus from comment #2)
> Since it seems that execute_command_line always sets a return value for the
> exitstat argument, one probably does not need to check against an initial
> value at all:
Sorry, I'm afraid that's actually not true. exitstat is not being set in all
situations (e.g. for asynchronous execution, i.e. with WAIT=.false.).
Therefore the patch in comment #2 is wrong and we're back to the question from
comment #1:
> What's a suitable value for estat_initial?
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83051] New: ICE on valid code at -O3: in edge_badness, at ipa-inline.c:1024
Date: Sun, 19 Nov 2017 18:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83051
Bug ID: 83051
Summary: ICE on valid code at -O3: in edge_badness, at
ipa-inline.c:1024
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
CC: marxin at gcc dot gnu.org
Target Milestone: ---
$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171119 (experimental) [trunk revision 254924] (GCC)
$
$ gcctk -O2 small.c
$ gcc-7.2.0 -O3 small.c
$
$ gcctk -O3 small.c
during IPA pass: inline
small.c:30:1: internal compiler error: in edge_badness, at ipa-inline.c:1024
}
^
0x1471968 edge_badness
../../gcc-source-trunk/gcc/ipa-inline.c:1023
0x1471e69 update_edge_key
../../gcc-source-trunk/gcc/ipa-inline.c:1223
0x147236e update_caller_keys
../../gcc-source-trunk/gcc/ipa-inline.c:1345
0x1474709 inline_small_functions
../../gcc-source-trunk/gcc/ipa-inline.c:2051
0x1474709 ipa_inline
../../gcc-source-trunk/gcc/ipa-inline.c:2442
0x1474709 execute
../../gcc-source-trunk/gcc/ipa-inline.c:2849
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
----------------------------------------------------------
int a[1], b, c, d, e, f, g, h;
void fn1 (int p)
{
b = b >> 8 ^ a[b ^ (c & 5)] >> 8 ^ a[(b ^ c) & 5];
b = b >> 8 ^ a[(b ^ c) & 5];
}
static void fn2 ()
{
int k;
while (1)
while (e)
{
while (g)
while (h)
for (k = 0; k < 6; k++)
while (f)
fn1 (0);
fn1 (0);
fn1 (0);
fn1 (0);
}
}
int main ()
{
fn2 ();
return 0;
}
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83011] -Wformat-truncation wrongly computes length (depends on the position of numbers in the addition)
Date: Sun, 19 Nov 2017 18:28:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Julien ÉLIE from comment #2)
Thanks. I can reproduce the warning with -Wstringop-truncation=2 and a small
test case:
$ cat d.c && gcc -g -O2 -S -Wall -Wformat-truncation=2
-fdump-tree-printf-return-value=/dev/stdout d.c
char* f (const char *s)
{
__SIZE_TYPE__ n = __builtin_strlen (s) + 2;
char *d = __builtin_malloc (n);
__builtin_snprintf (d, n, "%s ", s);
return d;
}
;; Function f (f, funcdef_no=0, decl_uid=1891, cgraph_uid=0, symbol_order=0)
d.c:7: __builtin_snprintf: objsize = 2, fmtstr = "%s "
Directive 1 at offset 0: "%s"
Result: 0, 1, -1, 9223372036854775807 (0, 1, -1, -1)
Directive 2 at offset 2: " ", length = 1
Result: 1, 1, 1, 1 (1, 2, -1, -1)
Directive 3 at offset 3: "", length = 1
d.c: In function ‘f’:
d.c:7:29: warning: ‘__builtin_snprintf’ output may be truncated before the last
format character [-Wformat-truncation=]
__builtin_snprintf (d, n, "%s ", s);
^~~~~
d.c:7:3: note: ‘__builtin_snprintf’ output 2 or more bytes (assuming 3) into a
destination of size 2
__builtin_snprintf (d, n, "%s ", s);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The line "d.c:7: __builtin_snprintf: objsize = 2, fmtstr = "%s "" shows that
for the small test case, the checker assumes the size of the destination
(objsize) is 2. In your case it assumes it's just 1. This is actually a
feature (although admittedly not a terribly intuitive one). At level 2, the
warning is designed to be more strict than at level 1, and avoiding it involves
essentially proving to the checker that truncation cannot happen. Under simple
circumstances when the size of the destination buffer is constant that's
usually fairly straightforward, but in more involved ones like in the test case
where the size of the buffer is a function of a number of variables, including
the length of a string argument to a %s directive, it can be less obvious. The
checker actually determines that the size is in some range between 1 and some
large number. At level 1, it takes the upper bound of the range to be the
size, but at level 2, it takes the lower bound, but the output of "%s " needs
at least two bytes. So to avoid the warning, you need to tell the checker the
buffer is bigger than 2 bytes (in your case, preferably bigger than 28 bytes,
because any less would imply the len computation wrapped around zero). The
simplest way to do it is by adding an assertion, e.g., like so:
len = 52 * timer_count + 27 + (prefix == NULL ? 0 : strlen(prefix)) + 1;
if (len < 28)
__builtin_unreachable (); // or abort()
buf = xmalloc(len);
If you compile your test case with this change the warning disappears and you
will see the following line in the output of the
-fdump-tree-printf-return-value option:
timer.c:395: snprintf: objsize = 28, fmtstr = "%s "
indicating the checker uses 28 and the minimum size of the buffer.
Let me know if this doesn't resolve the problem for you.
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Subject: [Bug target/82713] [8 Regression] ICE in ix86_builtin_vectorization_cost, at config/i386/i386.c:44475
Date: Sun, 19 Nov 2017 18:53:00 -0000
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--- Comment #7 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sun Nov 19 18:52:54 2017
New Revision: 254933
URL: https://gcc.gnu.org/viewcvs?rev=254933&root=gcc&view=rev
Log:
PR target/82713
* i386.c (ix86_builtin_vectorization_cost): Be ready for insane
types.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr82713.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug ipa/60243] IPA is slow on large cgraph tree
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--- Comment #19 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sun Nov 19 18:55:30 2017
New Revision: 254934
URL: https://gcc.gnu.org/viewcvs?rev=254934&root=gcc&view=rev
Log:
PR ipa/60243
* tree-inline.c (estimate_num_insns): Set to 1 at least.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-inline.c
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Subject: [Bug ipa/83001] [8 Regression] ICE in edge_badness, at ipa-inline.c:1025
Date: Sun, 19 Nov 2017 18:57:00 -0000
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--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sun Nov 19 18:56:58 2017
New Revision: 254935
URL: https://gcc.gnu.org/viewcvs?rev=254935&root=gcc&view=rev
Log:
PR ipa/83001
* profile-count.c (profile_count::to_sreal_scale): Fix return value
for uninitialied counts.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/profile-count.c
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Subject: [Bug fortran/82923] Automatic allocation of deferred length character using function result
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Confirmed, however I see an ICE when compiling the "type" variant of pr65381.
I have forgotten to say that the ICE is similar to the one in comment 1
pr65381_red.f90:15:0:
pure function fixedStringTable(this) result(fixed)
Error: Local declaration from a different function
D.3828
pr65381_red.f90:15:0:
pure function fixedStringTable(this) result(fixed)
note: in statement
D.3828 = MAX_EXPR <_8, 0>;
pr65381_red.f90:15:0:
pure function fixedStringTable(this) result(fixed)
Error: Local declaration from a different function
D.3828
pr65381_red.f90:15:0:
pure function fixedStringTable(this) result(fixed)
note: in statement
_11 = (sizetype) D.3828;
pr65381_red.f90:15:0:
pure function fixedStringTable(this) result(fixed)
Error: Local declaration from a different function
D.3828
pr65381_red.f90:15:0:
pure function fixedStringTable(this) result(fixed)
note: in statement
D.3894 = (sizetype) D.3828;
pr65381_red.f90:15:0:
pure function fixedStringTable(this) result(fixed)
Error: Local declaration from a different function
D.3828
pr65381_red.f90:26:0:
fixed(k) = this(i)%list(j)%chars
note: in statement
D.3883 = D.3828;
during GIMPLE pass: cfg
pr65381_red.f90:15:0:
pure function fixedStringTable(this) result(fixed)
internal compiler error: verify_gimple failed
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Subject: [Bug fortran/78990] [6/7/8 Regression] ICE when assigning polymorphic array function result
Date: Sun, 19 Nov 2017 19:51:00 -0000
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--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sun Nov 19 19:50:50 2017
New Revision: 254936
URL: https://gcc.gnu.org/viewcvs?rev=254936&root=gcc&view=rev
Log:
2017-11-19 Paul Thomas <pault@gcc.gnu.org>
PR fortran/78990
* expr.c (gfc_is_class_array_function): Renamed from
'gfc_is_alloc_class_array_function' and modified to return true
for pointers as well as allocatable results.
* gfortran.h : Change of name for prototype of above function.
* trans-array.c (gfc_add_loop_ss_code): Force finalization of
class array results.
(build_class_array_ref): Change assertion into a condition.
(build_class_array_ref): Set the se class_vptr for class array
function results.
(gfc_walk_function_expr): Reference gfc_is_class_array_function
as above.
* trans-decl.c (get_proc_result): Move it up before
gfc_trans_deferred_vars.
(gfc_trans_deferred_vars): Nullify explicit return class arrays
on entry.
* trans-expr.c (gfc_conv_class_to_class): Allow conversion of
class array functions that have an se class_vptr and use it
for the result vptr.
(gfc_conv_subref_array_arg): Rename reference to the above
function.
(gfc_conv_procedure_call): Ditto. Add the se pre block to the
loop pre block before the function is evaluated. Do not
finalize class pointer results.
(arrayfunc_assign_needs_temporary, gfc_trans_assignment_1) More
renamed references.
* trans-intrinsic.c (gfc_conv_intrinsic_size): Ditto.
2017-11-19 Paul Thomas <pault@gcc.gnu.org>
PR fortran/78990
* gfortran.dg/class_67.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/class_67.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/fortran/gfortran.h
trunk/gcc/fortran/resolve.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-intrinsic.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug ipa/81360] [8 Regression] ice in estimate_edge_growth, at ipa-inline.h:86
Date: Sun, 19 Nov 2017 19:58:00 -0000
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--- Comment #7 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sun Nov 19 19:58:12 2017
New Revision: 254937
URL: https://gcc.gnu.org/viewcvs?rev=254937&root=gcc&view=rev
Log:
PR ipa/81360
* ipa-inline.c (can_inline_edge_p): Also check that caller is optimized
* gcc.c-torture/compile/pr81360.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr81360.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-inline.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/37262] Two branches of the same condition being emitted
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
So not exactly surprising the second testcase was fixed by r251690.
This should probably not be backported. The first testcase is fixed
everywhere. Closing the bug now.
>From gcc-bugs-return-582216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 20:31:11 2017
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Subject: [Bug target/82281] Bulldozer/Zen tuning: uses XMM for single 64-bit integer AND, even with a simple mask
Date: Sun, 19 Nov 2017 20:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82281
--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sun Nov 19 20:30:26 2017
New Revision: 254939
URL: https://gcc.gnu.org/viewcvs?rev=254939&root=gcc&view=rev
Log:
PR target/82281
* gcc.target/i386/pr82281.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr82281.c
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-582217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 21:12:42 2017
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
Date: Sun, 19 Nov 2017 21:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83027
--- Comment #15 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> It is a GCC bug rather than an Ahven bug, because the bug is triggered by
> `with Ada.Text_IO;` (and disappears if we remove this line from
> spawn-signals.adb) which should not influence semantics of the program,
> because the imported package is not used.
Maybe, but can you extract a self-contained reproducer in order to give a
definitive answer to the question? I know nothing about this Ahven library.
>From gcc-bugs-return-582218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 21:19:34 2017
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Subject: [Bug middle-end/83023] branch probabilities pessimize malloc
Date: Sun, 19 Nov 2017 21:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83023
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC|mliska at suse dot cz |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Thanks for report. That can be definitely improved.
>From gcc-bugs-return-582219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 21:39:09 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83052] New: ICE in extract_insn, at recog.c:2305 starting from r254560
Date: Sun, 19 Nov 2017 21:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83052
Bug ID: 83052
Summary: ICE in extract_insn, at recog.c:2305 starting from
r254560
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: andi-gcc at firstfloor dot org
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After Andi's patch we ICE on:
$ gcc /home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/tls/run-ld.c
-mforce-indirect-call
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/tls/run-ld.c: In
function ‘get_ld’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/tls/run-ld.c:13:1:
error: unrecognizable insn:
}
^
(call_insn/u 5 2 6 2 (parallel [
(set (reg:DI 0 ax)
(call:DI (mem:QI (symbol_ref:DI ("__tls_get_addr")) [0 S1 A8])
(const_int 0 [0])))
(unspec:DI [
(symbol_ref:DI ("tls_ld") [flags 0x12] <var_decl
0x7f9b58913e10 tls_ld>)
(reg/f:DI 7 sp)
] UNSPEC_TLS_GD)
])
"/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/tls/run-ld.c":12 -1
(expr_list:REG_EH_REGION (const_int -2147483648 [0xffffffff80000000])
(nil))
(nil))
during RTL pass: vregs
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/tls/run-ld.c:13:1:
internal compiler error: in extract_insn, at recog.c:2305
0x5be174 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc/rtl-error.c:108
0x5be193 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
../../gcc/rtl-error.c:116
0xb2d9af extract_insn(rtx_insn*)
../../gcc/recog.c:2305
0x8dae81 instantiate_virtual_regs_in_insn
../../gcc/function.c:1639
0x8dae81 instantiate_virtual_regs
../../gcc/function.c:1959
0x8dae81 execute
../../gcc/function.c:2008
>From gcc-bugs-return-582220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 21:43:11 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83053] New: [8 Regression] ICE in vrp_prop::check_array_ref at cc/tree-vrp.c:4811
Date: Sun, 19 Nov 2017 21:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83053
Bug ID: 83053
Summary: [8 Regression] ICE in vrp_prop::check_array_ref at
cc/tree-vrp.c:4811
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
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CC: msebor at gcc dot gnu.org
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Starting from Martin's commit r254830 we ICE on:
$ gfortran
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90
-Ofast -Warray-bounds=1 -c
during GIMPLE pass: vrp
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90:59:0:
recursive subroutine quicksort( array )
internal compiler error: Segmentation fault
0xc1478f crash_signal
.././../gcc/toplev.c:325
0x92bed4 contains_struct_check(tree_node const*, tree_node_structure_enum, char
const*, int, char const*)
.././../gcc/tree.h:3459
0x92bed4 wi::to_wide(tree_node const*)
.././../gcc/tree.h:5247
0xebb658 vrp_prop::check_array_ref(unsigned int, tree_node*, bool)
.././../gcc/tree-vrp.c:4811
0xecc434 vrp_prop::check_array_ref(unsigned int, tree_node*, bool)
.././../gcc/tree-vrp.c:4780
0xecc434 vrp_prop::search_for_addr_array(tree_node*, unsigned int)
.././../gcc/tree-vrp.c:4901
0xecca79 check_array_bounds
.././../gcc/tree-vrp.c:4988
0xef7003 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
.././../gcc/tree.c:11122
0x97a083 walk_gimple_op(gimple*, tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
.././../gcc/gimple-walk.c:202
0xebca12 vrp_prop::check_all_array_refs()
.././../gcc/tree-vrp.c:5028
0xebe6bf vrp_prop::vrp_finalize(bool)
.././../gcc/tree-vrp.c:6791
0xecd3a8 execute_vrp
.././../gcc/tree-vrp.c:6864
>From gcc-bugs-return-582221-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 21:55:28 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83054] New: [8 Regression] ICE in operator>, at profile-count.h:823
Date: Sun, 19 Nov 2017 21:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83054
Bug ID: 83054
Summary: [8 Regression] ICE in operator>, at
profile-count.h:823
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Starting from r254832 we ICE on:
$ ~/Programming/gcc/objdir/gcc/xg++ -B ~/Programming/gcc/objdir/gcc/
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/gomp/pr31769.C -O3
-Wsuggest-final-types
during IPA pass: devirt
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/gomp/pr31769.C:61:1: internal
compiler error: in operator>, at profile-count.h:834
}
^
0xc9aa6b profile_count::operator>(long) const
../../gcc/profile-count.h:834
0xc9aa6b ipa_devirt
../../gcc/ipa-devirt.c:3750
0xc9aa6b execute
../../gcc/ipa-devirt.c:3892
>From gcc-bugs-return-582222-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 22:11:47 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83055] New: [8 Regression] ICE in operator>, at profile-count.h:834
Date: Sun, 19 Nov 2017 22:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83055
Bug ID: 83055
Summary: [8 Regression] ICE in operator>, at
profile-count.h:834
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org
Target Milestone: ---
Starting from r254888 we ICE on:
$ ~/Programming/gcc/objdir/gcc/xg++ -B ~/Programming/gcc/objdir/gcc/
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/ipa/pr68672-1.C -O1
-fbranch-probabilities
during IPA pass: profile
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/ipa/pr68672-1.C:20:1:
internal compiler error: in operator>, at profile-count.h:834
}
^
0xdbf76b profile_count::operator>(long) const
../../gcc/profile-count.h:834
0xdbf76b handle_missing_profiles()
../../gcc/predict.c:3289
0xf40fbf tree_profiling
../../gcc/tree-profile.c:750
0xf40fbf execute
../../gcc/tree-profile.c:780
>From gcc-bugs-return-582223-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 22:37:02 2017
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Subject: =?UTF-8?B?W0J1ZyBhZGEvODMwMTZdIGduYXQxOiB3YXJuaW5nOiBjb21tYW5kIGxpbmUg?= =?UTF-8?B?b3B0aW9uIOKAmC1ub3N0ZGluYysr4oCZIGlzIHZhbGlkIGZvciBDKysvT2Jq?= =?UTF-8?B?QysrIGJ1dCBub3QgZm9yIEFkYQ==?Date: Sun, 19 Nov 2017 22:37:00 -0000
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--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Sun Nov 19 22:36:25 2017
New Revision: 254940
URL: https://gcc.gnu.org/viewcvs?rev=254940&root=gcc&view=rev
Log:
PR ada/83016
* gnatlink.adb (Process_Args): Accept multiple switches for --LINK.
(Usage): Adjust.
* gcc-interface/Makefile.in (GCC_LINK): Remove $(ADA_INCLUDES).
(common-tools): Pass $(CC) as --GCC= and $(GCC_LINK) as --LINK= in
the invocations of $(GNATLINK).
(../../gnatdll$(exeext)): Likewise.
(../../vxaddr2line$(exeext)): Likewise.
(gnatmake-re): Likewise.
(gnatlink-re): Likewise.
Modified:
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/gcc-interface/Makefile.in
trunk/gcc/ada/gnatlink.adb
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Subject: =?UTF-8?B?W0J1ZyBhZGEvODMwMTZdIGduYXQxOiB3YXJuaW5nOiBjb21tYW5kIGxpbmUg?= =?UTF-8?B?b3B0aW9uIOKAmC1ub3N0ZGluYysr4oCZIGlzIHZhbGlkIGZvciBDKysvT2Jq?= =?UTF-8?B?QysrIGJ1dCBub3QgZm9yIEFkYQ==?Date: Sun, 19 Nov 2017 22:37:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
>From gcc-bugs-return-582225-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 19 22:41:18 2017
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81362] [8 regression] FAIL: gcc.dg/vect/no-vfa-vect-57.c execution test
Date: Sun, 19 Nov 2017 22:41:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Is this fixed now?
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/83001] [8 Regression] ICE in edge_badness, at ipa-inline.c:1025
Date: Sun, 19 Nov 2017 22:49:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |hubicka at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Fixed.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83053] [8 Regression] ICE in vrp_prop::check_array_ref at cc/tree-vrp.c:4811
Date: Sun, 19 Nov 2017 23:46:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-19
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
I can't reproduce the ICE with the current top of trunk. My output is below.
Running GCC through Valgrind also doesn't show any unexpected errors. I do see
a ton of test suite failures with this build, though.
$ /opt/notnfs/msebor/build/gcc-git/gcc/gfortran -B
/opt/notnfs/msebor/build/gcc-git/gcc -O1 -S -Wall -Warray-bounds=1
/opt/notnfs/msebor/src/gcc/git/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90
/opt/notnfs/msebor/src/gcc/git/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90:65:16:
integer :: k
1
Warning: Unused variable ‘k’ declared at (1) [-Wunused-variable]
/opt/notnfs/msebor/src/gcc/git/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90:129:0:
end function lower_sortable
Warning: ‘__result_lower_sortable’ may be used uninitialized in this function
[-Wmaybe-uninitialized]
/opt/notnfs/msebor/src/gcc/git/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90:121:0:
logical function lower_sortable( op1, op2 )
note: ‘__result_lower_sortable’ was declared here
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From: "porton at narod dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
Date: Sun, 19 Nov 2017 23:51:00 -0000
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--- Comment #16 from Victor Porton <porton at narod dot ru> ---
I've discovered that Ahven source uses tasking.
So it is most likely some tasking problem with Ahven.
>From gcc-bugs-return-582229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 01:04:13 2017
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From: "jamrial at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/83056] New: GCC suggests the use of previously reported undeclared identifiers when reporting new undeclared identifiers
Date: Mon, 20 Nov 2017 01:04:00 -0000
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Bug ID: 83056
Summary: GCC suggests the use of previously reported undeclared
identifiers when reporting new undeclared identifiers
Product: gcc
Version: 7.2.0
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$ cat suggest.c
enum {
TYPE_A,
}
int fn(void)
{
int b = TYPE_B;
int c = TYPE_C;
int d = TYPE_D;
return 0;
}
$ gcc -O3 -Wall -c suggest.c
suggest.c: In function 'fn':
suggest.c:7:13: error: 'TYPE_B' undeclared (first use in this function); did
you mean 'TYPE_A'?
int b = TYPE_B;
^~~~~~
TYPE_A
suggest.c:7:13: note: each undeclared identifier is reported only once for each
function it appears in
suggest.c:8:13: error: 'TYPE_C' undeclared (first use in this function); did
you mean 'TYPE_B'?
int c = TYPE_C;
^~~~~~
TYPE_B
suggest.c:9:13: error: 'TYPE_D' undeclared (first use in this function); did
you mean 'TYPE_C'?
int d = TYPE_D;
^~~~~~
TYPE_C
For some reason, for every new undeclared identifier gcc suggest to use a
previously reported (but apparently similar) undeclared identifier.
Shouldn't it always suggest TYPE_A, the only defined identifier?
>From gcc-bugs-return-582230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 01:19:27 2017
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From: "eggert at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/61118] Spurious -Wclobbered warning generated by gcc 4.9.0 for pthread_cleanup_push
Date: Mon, 20 Nov 2017 01:19:00 -0000
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Paul Eggert <eggert at gnu dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |eggert at gnu dot org
--- Comment #12 from Paul Eggert <eggert at gnu dot org> ---
(In reply to Yuri Gribov from comment #11)
> (In reply to Tavian Barnes from comment #10)
> > > I think it is - __cancel_arg is assigned inside a while loop
> >
> > Specifically a do { } while(0); loop, which obviously has only one iteration.
>
> Actually I was talking about surrounding while
> ((double)future->progress/future->total < progress)...
The variables in question do not survive from one iteration to the next of the
surrounding while loop, so they cannot contribute to a setjmp/longjmp problem.
The code looks like this:
while ((double)future->progress/future->total < progress) {
...
void (*__cancel_routine) (void *) = (cleanup_fn);
void *__cancel_arg = (&future->mutex);
if (__sigsetjmp (((struct __jmp_buf_tag *) (void *)
__cancel_buf.__cancel_jmp_buf),
0)) {
__cancel_routine (__cancel_arg);
...
}
...
}
As the addresses of the locals do not escape and they are never assigned to
after initialization and they do not survive until the next call to
__sigsetjmp, the warnings are false alarms.
Possibly GCC is hoisting the locals out of the loop, incorrectly transforming
the above code into this:
void (*__cancel_routine) (void *);
void *__cancel_arg;
while ((double)future->progress/future->total < progress) {
...
__cancel_routine = (cleanup_fn);
__cancel_arg = (&future->mutex);
if (__sigsetjmp (((struct __jmp_buf_tag *) (void *)
__cancel_buf.__cancel_jmp_buf),
0)) {
__cancel_routine (__cancel_arg);
...
}
...
}
where the warning would be valid.
Also see Bug 48968 which has similar symptoms.
>From gcc-bugs-return-582231-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 01:26:49 2017
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From: "eggert at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/65041] Improve -Wclobbered
Date: Mon, 20 Nov 2017 01:26:00 -0000
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Paul Eggert <eggert at gnu dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |eggert at gnu dot org
--- Comment #3 from Paul Eggert <eggert at gnu dot org> ---
The bug for a2 seems related to Bug 21161, for which we have several
near-replicas (Bug 48968, Bug 54561, Bug 61118).
>From gcc-bugs-return-582232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 01:33:54 2017
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From: "urbanjost at comcast dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83057] New: OPEN(3f) without a filename and without STATUS='SCRATCH' does not produce a warning as being an extension on unassigned files
Date: Mon, 20 Nov 2017 01:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83057
Bug ID: 83057
Summary: OPEN(3f) without a filename and without
STATUS='SCRATCH' does not produce a warning as being
an extension on unassigned files
Product: gcc
Version: 6.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: urbanjost at comcast dot net
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The standard states if a unconnected file is opened with a unit but
not with a filename that STATUS='SCRATCH' must be supplied. If so,
the two OPEN(3f) statements below are not standard, but no warning
is produced. Instead, files fort.20 and fort.-10 are created. The
program creates the files if they do not exist, and produces no errors
if they do exist.
I know many compilers (at least in the past) that create files with
a default name when a unit without a FILE= specifier is used such as
below, but it appears that is non-standard.
So should the OPEN(3f) statements below at least produce a warning
about being non-standard? I am using GNU Fortran (GCC) 6.4.0:
gfortran -std=f2008 -Wall xxx.F90
Perhaps something like
'Warning: GNU Fortran extension: OPEN(3f) of an unconnected file without
a filename requires STATUS='SCRATCH' be specified'
! If the NEWUNIT= specifier appears in an OPEN statement, either the
! FILE= specifier shall appear, or the STATUS= specifier shall appear
! with a value of SCRATCH. The unit identified by a NEWUNIT value shall
! not be preconnected.
!
! If the filename is omitted and the unit is not connected to a file,
! the STATUS= specifier shall be specified with a value of SCRATCH;
! in this case, the connection is made to a processor-dependent file.
open(20)
open(newunit=lun)
end
>From gcc-bugs-return-582233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 02:21:18 2017
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83058] New: ICE on C++ code with negative array index: in warn_placement_new_too_small, at cp/init.c:2666
Date: Mon, 20 Nov 2017 02:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83058
Bug ID: 83058
Summary: ICE on C++ code with negative array index: in
warn_placement_new_too_small, at cp/init.c:2666
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
This appears to be a recent regression.
$ g++tk -v
Using built-in specs.
COLLECT_GCC=g++tk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171119 (experimental) [trunk revision 254940] (GCC)
$
$ g++-7.2.0 -c -w tmp.cpp
$ clang++ -c -w tmp.cpp
$ icc -c -w tmp.cpp
$
$ g++tk -c -w tmp.cpp
tmp.cpp: In member function ‘void B::f()’:
tmp.cpp:7:31: internal compiler error: in warn_placement_new_too_small, at
cp/init.c:2666
void f () { new (&d[-1]) A (); }
^
0x79f563 warn_placement_new_too_small
../../gcc-source-trunk/gcc/cp/init.c:2666
0x7a858e build_new_1
../../gcc-source-trunk/gcc/cp/init.c:3209
0x7a99b8 build_new(vec<tree_node*, va_gc, vl_embed>**, tree_node*, tree_node*,
vec<tree_node*, va_gc, vl_embed>**, int, int)
../../gcc-source-trunk/gcc/cp/init.c:3678
0x81f7c6 cp_parser_new_expression
../../gcc-source-trunk/gcc/cp/parser.c:8517
0x82ba67 cp_parser_unary_expression
../../gcc-source-trunk/gcc/cp/parser.c:8223
0x7fafcc cp_parser_cast_expression
../../gcc-source-trunk/gcc/cp/parser.c:9131
0x7fb733 cp_parser_binary_expression
../../gcc-source-trunk/gcc/cp/parser.c:9232
0x7fc020 cp_parser_assignment_expression
../../gcc-source-trunk/gcc/cp/parser.c:9519
0x7fc8ca cp_parser_expression
../../gcc-source-trunk/gcc/cp/parser.c:9688
0x8001a9 cp_parser_expression_statement
../../gcc-source-trunk/gcc/cp/parser.c:11205
0x80b895 cp_parser_statement
../../gcc-source-trunk/gcc/cp/parser.c:11021
0x80cb9f cp_parser_statement_seq_opt
../../gcc-source-trunk/gcc/cp/parser.c:11348
0x80ccaf cp_parser_compound_statement
../../gcc-source-trunk/gcc/cp/parser.c:11302
0x825490 cp_parser_function_body
../../gcc-source-trunk/gcc/cp/parser.c:21840
0x825490 cp_parser_ctor_initializer_opt_and_function_body
../../gcc-source-trunk/gcc/cp/parser.c:21875
0x825edc cp_parser_function_definition_after_declarator
../../gcc-source-trunk/gcc/cp/parser.c:26766
0x82b1cc cp_parser_late_parsing_for_member
../../gcc-source-trunk/gcc/cp/parser.c:27647
0x805c5e cp_parser_class_specifier_1
../../gcc-source-trunk/gcc/cp/parser.c:22729
0x807549 cp_parser_class_specifier
../../gcc-source-trunk/gcc/cp/parser.c:22755
0x807549 cp_parser_type_specifier
../../gcc-source-trunk/gcc/cp/parser.c:16819
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
--------------------------------
void *operator new (long unsigned int, void *p) { return p; }
struct A {};
struct B
{
void f () { new (&d[-1]) A (); }
int d[2];
};
>From gcc-bugs-return-582234-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 02:41:12 2017
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83059] New: ICE on invalid C++ code: in tree_to_uhwi, at tree.c:6633
Date: Mon, 20 Nov 2017 02:41:00 -0000
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Bug ID: 83059
Summary: ICE on invalid C++ code: in tree_to_uhwi, at
tree.c:6633
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
It seems to affect at least all versions as early as 4.8.x.
$ g++tk -v
Using built-in specs.
COLLECT_GCC=g++tk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171119 (experimental) [trunk revision 254940] (GCC)
$
$ g++-4.8 -c tmp.cpp
tmp.cpp: In member function ‘void A::f()’:
tmp.cpp:11:54: internal compiler error: in tree_low_cst, at tree.h:4851
__atomic_compare_exchange (&i, &a, &b, false, 0, -1);
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.8/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccbLk5Tw.out file, please attach this to
your bugreport.
ERROR: Cannot create report: [Errno 17] File exists:
'/var/crash/_usr_lib_gcc_x86_64-linux-gnu_4.8_cc1plus.1001.crash'
$
$ g++tk -c tmp.cpp
tmp.cpp: In member function ‘void A::f()’:
tmp.cpp:11:54: internal compiler error: in tree_to_uhwi, at tree.c:6633
__atomic_compare_exchange (&i, &a, &b, false, 0, -1);
^
0x11376e2 tree_to_uhwi(tree_node const*)
../../gcc-source-trunk/gcc/tree.c:6633
0x92692d get_atomic_generic_size
../../gcc-source-trunk/gcc/c-family/c-common.c:6674
0x95a55a resolve_overloaded_atomic_compare_exchange
../../gcc-source-trunk/gcc/c-family/c-common.c:6834
0x95a55a resolve_overloaded_builtin(unsigned int, tree_node*, vec<tree_node*,
va_gc, vl_embed>*)
../../gcc-source-trunk/gcc/c-family/c-common.c:7075
0x8ba6ef finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
../../gcc-source-trunk/gcc/cp/semantics.c:2450
0x81060c cp_parser_postfix_expression
../../gcc-source-trunk/gcc/cp/parser.c:7239
0x82b97c cp_parser_unary_expression
../../gcc-source-trunk/gcc/cp/parser.c:8363
0x7fafcc cp_parser_cast_expression
../../gcc-source-trunk/gcc/cp/parser.c:9131
0x7fb733 cp_parser_binary_expression
../../gcc-source-trunk/gcc/cp/parser.c:9232
0x7fc020 cp_parser_assignment_expression
../../gcc-source-trunk/gcc/cp/parser.c:9519
0x7fc8ca cp_parser_expression
../../gcc-source-trunk/gcc/cp/parser.c:9688
0x8001a9 cp_parser_expression_statement
../../gcc-source-trunk/gcc/cp/parser.c:11205
0x80b895 cp_parser_statement
../../gcc-source-trunk/gcc/cp/parser.c:11021
0x80cb9f cp_parser_statement_seq_opt
../../gcc-source-trunk/gcc/cp/parser.c:11348
0x80ccaf cp_parser_compound_statement
../../gcc-source-trunk/gcc/cp/parser.c:11302
0x825490 cp_parser_function_body
../../gcc-source-trunk/gcc/cp/parser.c:21840
0x825490 cp_parser_ctor_initializer_opt_and_function_body
../../gcc-source-trunk/gcc/cp/parser.c:21875
0x825edc cp_parser_function_definition_after_declarator
../../gcc-source-trunk/gcc/cp/parser.c:26766
0x826ccd cp_parser_function_definition_from_specifiers_and_declarator
../../gcc-source-trunk/gcc/cp/parser.c:26683
0x826ccd cp_parser_init_declarator
../../gcc-source-trunk/gcc/cp/parser.c:19541
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
-----------------------------
class A
{
void f ();
int i;
} a;
int b;
void A::f ()
{
__atomic_compare_exchange (&i, &a, &b, false, 0, -1);
}
>From gcc-bugs-return-582235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 03:15:42 2017
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83057] OPEN(3f) without a filename and without STATUS='SCRATCH' does not produce a warning as being an extension on unassigned files
Date: Mon, 20 Nov 2017 03:15:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jvdelisle at gcc dot gnu.org
--- Comment #1 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
What is the '3f' in the post?
>From gcc-bugs-return-582236-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 05:27:08 2017
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83060] New: ICE on valid C++ code: in ignore_overflows, at cp/cvt.c:583
Date: Mon, 20 Nov 2017 05:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83060
Bug ID: 83060
Summary: ICE on valid C++ code: in ignore_overflows, at
cp/cvt.c:583
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
It affects at least all versions as early as 4.8.x.
$ g++tk -v
Using built-in specs.
COLLECT_GCC=g++tk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171119 (experimental) [trunk revision 254940] (GCC)
$
$ clang++ -c tmp.cpp
$ icc -c tmp.cpp
$
$ g++tk -c tmp.cpp
tmp.cpp:7:37: internal compiler error: in ignore_overflows, at cp/cvt.c:583
int b = __builtin_offsetof (A, s[-1]);
^
0x72ac8d ignore_overflows
../../gcc-source-trunk/gcc/cp/cvt.c:583
0x72d428 ocp_convert(tree_node*, tree_node*, int, int, int)
../../gcc-source-trunk/gcc/cp/cvt.c:817
0x80ef06 cp_parser_builtin_offsetof
../../gcc-source-trunk/gcc/cp/parser.c:9930
0x80ef06 cp_parser_primary_expression
../../gcc-source-trunk/gcc/cp/parser.c:5335
0x8103dd cp_parser_postfix_expression
../../gcc-source-trunk/gcc/cp/parser.c:7022
0x82b97c cp_parser_unary_expression
../../gcc-source-trunk/gcc/cp/parser.c:8363
0x7fafcc cp_parser_cast_expression
../../gcc-source-trunk/gcc/cp/parser.c:9131
0x7fb733 cp_parser_binary_expression
../../gcc-source-trunk/gcc/cp/parser.c:9232
0x7fc020 cp_parser_assignment_expression
../../gcc-source-trunk/gcc/cp/parser.c:9519
0x7fd0f3 cp_parser_constant_expression
../../gcc-source-trunk/gcc/cp/parser.c:9803
0x7fd9c7 cp_parser_initializer_clause
../../gcc-source-trunk/gcc/cp/parser.c:21978
0x8007d3 cp_parser_initializer
../../gcc-source-trunk/gcc/cp/parser.c:21918
0x8268a6 cp_parser_init_declarator
../../gcc-source-trunk/gcc/cp/parser.c:19716
0x82949f cp_parser_simple_declaration
../../gcc-source-trunk/gcc/cp/parser.c:13125
0x82a338 cp_parser_block_declaration
../../gcc-source-trunk/gcc/cp/parser.c:12943
0x832674 cp_parser_declaration
../../gcc-source-trunk/gcc/cp/parser.c:12840
0x831016 cp_parser_declaration_seq_opt
../../gcc-source-trunk/gcc/cp/parser.c:12716
0x83133e cp_parser_translation_unit
../../gcc-source-trunk/gcc/cp/parser.c:4502
0x83133e c_parse_file()
../../gcc-source-trunk/gcc/cp/parser.c:39022
0x977ee5 c_common_parse_file()
../../gcc-source-trunk/gcc/c-family/c-opts.c:1127
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
----------------------------------
struct A
{
int i;
int s[8];
};
int b = __builtin_offsetof (A, s[-1]);
>From gcc-bugs-return-582237-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 05:34:32 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/83061] New: -Wmaybe-uninitialized warnings in gcc/lto/lto-object.c
Date: Mon, 20 Nov 2017 05:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83061
Bug ID: 83061
Summary: -Wmaybe-uninitialized warnings in gcc/lto/lto-object.c
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
LTO/PGO bootstrap shows:
../../gcc/gcc/lto/lto-object.c: In function ‘lto_obj_append_data’:
../../gcc/gcc/lto/lto-object.c:361:7: warning: ‘err’ may be used uninitialized
in this function [-Wmaybe-uninitialized]
if (err == 0)
^
../../gcc/gcc/lto/lto-object.c:352:7: note: ‘err’ was declared here
int err;
^
../../gcc/gcc/lto/lto-object.c: In function ‘lto_obj_begin_section’:
../../gcc/gcc/lto/lto-object.c:337:7: warning: ‘err’ may be used uninitialized
in this function [-Wmaybe-uninitialized]
if (err == 0)
^
../../gcc/gcc/lto/lto-object.c:324:7: note: ‘err’ was declared here
int err;
^
../../gcc/gcc/lto/lto-object.c:338:14: warning: ‘errmsg’ may be used
uninitialized in this function [-Wmaybe-uninitialized]
fatal_error (input_location, "%s", errmsg);
^
../../gcc/gcc/lto/lto-object.c:323:15: note: ‘errmsg’ was declared here
const char *errmsg;
^
All of the warnings are correct.
include/simple-object.h:
159 /* Add a section to SIMPLE_OBJECT. NAME is the name of the new
160 section. ALIGN is the required alignment expressed as the number
161 of required low-order 0 bits (e.g., 2 for alignment to a 32-bit
162 boundary). The section is created as containing data, readable,
163 not writable, not executable, not loaded at runtime. On error this
164 returns NULL, sets *ERRMSG to an error message, and sets *ERR to an
165 errno value or 0 if there isn't one. */
166
167 extern simple_object_write_section *
168 simple_object_write_create_section (simple_object_write *simple_object,
169 const char *name, unsigned int align,
170 const char **errmsg, int *err);
But libiberty/simple-object.c has:
411 simple_object_write_section *
412 simple_object_write_create_section (simple_object_write *sobj, const char
*name,
413 unsigned int align,
414 const char **errmsg ATTRIBUTE_UNUSED,
415 int *err ATTRIBUTE_UNUSED)
>From gcc-bugs-return-582238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 05:57:19 2017
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Subject: =?UTF-8?B?W0J1ZyBib290c3RyYXAvODMwNjJdIE5ldzogWzggcmVncmVzc2lvbl0gQm9v?= =?UTF-8?B?dHN0cmFwIGZhaWx1cmU6IGxpYnNhbml0aXplci90c2FuL3RzYW5fcnRsLmg6?= =?UTF-8?B?NzEzOjQ0OiBlcnJvcjogaW5saW5pbmcgZmFpbGVkIGluIGNhbGwgdG8gYWx3?= =?UTF-8?B?YXlzX2lubGluZSDigJh2b2lkIF9fdHNhbjo6TWVtb3J5UmVhZChfX3RzYW46?= =?UTF-8?B?OlRocmVhZFN0YXRlKiwgX19zYW5pdGl6ZXI6OnVwdHIsIF9fc2FuaXRpemVy?= =?UTF-8?B?OiA6dXB0ciwgaW50KeKAmTogY2FsbGVyIGlzIG5vdCBvcHRpbWl6ZWQ=?Date: Mon, 20 Nov 2017 05:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83062
Bug ID: 83062
Summary: [8 regression] Bootstrap failure:
libsanitizer/tsan/tsan_rtl.h:713:44: error: inlining
failed in call to always_inline ‘void
__tsan::MemoryRead(__tsan::ThreadState*,
__sanitizer::uptr, __sanitizer: :uptr, int)’: caller
is not optimized
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
CC: hubicka at ucw dot cz
Target Milestone: ---
trippels@gcc2-power8 tsan % /home/trippels/gcc_build_dir_/./gcc/xgcc
-shared-libgcc -B/home/trippels/gcc_build_dir_/./gcc -nostdinc++
-L/home/trippels/gcc_build_dir_/powerpc64le-
unknown-linux-gnu/libstdc++-v3/src
-L/home/trippels/gcc_build_dir_/powerpc64le-unknown-linux-gnu/libstdc++-v3/src/.libs
-L/home/trippels/gcc_build_dir_/powerpc64le-unknown-linux-g
nu/libstdc++-v3/libsupc++/.libs -B/usr/local/powerpc64le-unknown-linux-gnu/bin/
-B/usr/local/powerpc64le-unknown-linux-gnu/lib/ -isystem
/usr/local/powerpc64le-unknown-linux-gnu/i
nclude -isystem /usr/local/powerpc64le-unknown-linux-gnu/sys-include
-D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS
-D__STDC_LIMIT_MACROS -DCAN_SANITIZE_UB
=0 -I. -I../../../../gcc/libsanitizer/tsan -I.. -I ../../../../gcc/libsanitizer
-I ../../../../gcc/libsanitizer/include -Wall -W -Wno-unused-parameter
-Wwrite-strings -pedantic -W
no-long-long -fPIC -fno-builtin -fno-exceptions -fno-rtti -fomit-frame-pointer
-funwind-tables -fvisibility=hidden -Wno-variadic-macros
-I../../libstdc++-v3/include -I../../libstd
c++-v3/include/powerpc64le-unknown-linux-gnu
-I../../../../gcc/libsanitizer/../libstdc++-v3/libsupc++ -std=gnu++11
-mcpu=power8 -O3 -pipe -MT tsan_external.lo -MD -MP -MF .deps/ts
an_external.Tpo -c ../../../../gcc/libsanitizer/tsan/tsan_external.cc -fPIC
-DPIC -o .libs/tsan_external.o
In file included from ../../../../gcc/libsanitizer/tsan/tsan_external.cc:11:
../../../../gcc/libsanitizer/tsan/tsan_rtl.h: In function ‘void
__tsan::ExternalAccess(void*, void*, void*, __tsan::AccessFunc)’:
../../../../gcc/libsanitizer/tsan/tsan_rtl.h:713:20: error: inlining failed in
call to always_inline ‘void __tsan::MemoryRead(__tsan::ThreadState*,
__sanitizer::uptr, __sanitizer:
:uptr, int)’: caller is not optimized
void ALWAYS_INLINE MemoryRead(ThreadState *thr, uptr pc,
^~~~~~~~~~
../../../../gcc/libsanitizer/tsan/tsan_external.cc:66:11: note: called from
here
access(thr, CALLERPC, (uptr)addr, kSizeLog1);
~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../../../gcc/libsanitizer/tsan/tsan_external.cc:11:
../../../../gcc/libsanitizer/tsan/tsan_rtl.h: In function ‘void
__tsan::ExternalAccess(void*, void*, void*, __tsan::AccessFunc)’:
../../../../gcc/libsanitizer/tsan/tsan_rtl.h:718:20: error: inlining failed in
call to always_inline ‘void __tsan::MemoryWrite(__tsan::ThreadState*,
__sanitizer::uptr, __sanitizer
::uptr, int)’: caller is not optimized
void ALWAYS_INLINE MemoryWrite(ThreadState *thr, uptr pc,
^~~~~~~~~~~
../../../../gcc/libsanitizer/tsan/tsan_external.cc:66:11: note: called from
here
access(thr, CALLERPC, (uptr)addr, kSizeLog1);
~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Reducing...
>From gcc-bugs-return-582239-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 06:01:51 2017
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83062
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-20
Ever confirmed|0 |1
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
trippels@gcc2-power8 tsan % cat tsan_external.ii
void __attribute__((always_inline)) fn1(int *, long, long, int) {}
typedef void AccessFunc(int *, long, long, int);
void fn2(AccessFunc p1) {
bool a(&a);
p1(0, 0, 0, 0);
fn2(fn1);
}
trippels@gcc2-power8 tsan % g++ -O3 -c tsan_external.ii
tsan_external.ii:1:37: warning: always_inline function might not be inlinable
[-Wattributes]
void __attribute__((always_inline)) fn1(int *, long, long, int) {}
^~~
tsan_external.ii: In function ‘void fn2(void (*)(int*, long int, long int,
int))’:
tsan_external.ii:1:37: error: inlining failed in call to always_inline ‘void
fn1(int*, long int, long int, int)’: caller is not optimized
tsan_external.ii:5:5: note: called from here
p1(0, 0, 0, 0);
~~^~~~~~~~~~~~
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/82020] ICE in decompose at rtl.h:2126
Date: Mon, 20 Nov 2017 08:21:00 -0000
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--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Mon Nov 20 08:20:35 2017
New Revision: 254944
URL: https://gcc.gnu.org/viewcvs?rev=254944&root=gcc&view=rev
Log:
Fix comparison mode in simplify_ternary_operation
2017-11-20 Tom de Vries <tom@codesourcery.com>
PR rtl-optimization/82020
* simplify-rtx.c (simplify_ternary_operation): Fix comparison mode of
IF_THEN_ELSE condition.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/simplify-rtx.c
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Subject: =?UTF-8?B?W0J1ZyBib290c3RyYXAvODMwNjJdIFs4IHJlZ3Jlc3Npb25dIEJvb3RzdHJh?= =?UTF-8?B?cCBmYWlsdXJlOiBsaWJzYW5pdGl6ZXIvdHNhbi90c2FuX3J0bC5oOjcxMzo0?= =?UTF-8?B?NDogZXJyb3I6IGlubGluaW5nIGZhaWxlZCBpbiBjYWxsIHRvIGFsd2F5c19p?= =?UTF-8?B?bmxpbmUg4oCYdm9pZCBfX3RzYW46Ok1lbW9yeVJlYWQoX190c2FuOjpUaHJl?= =?UTF-8?B?YWRTdGF0ZSosIF9fc2FuaXRpemVyOjp1cHRyLCBfX3Nhbml0aXplcjogOnVw?= =?UTF-8?B?dHIsIGludCnigJk6IGNhbGxlciBpcyBub3Qgb3B0aW1pemVk?Date: Mon, 20 Nov 2017 08:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83062
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
While x86_64/i686 bootstrap worked, there are hundreds of regressions, e.g.
+FAIL: c-c++-common/attr-warn-unused-result.c -Wc++-compat (test for excess
errors)
+FAIL: gcc.dg/always_inline3.c (test for errors, line 5)
+FAIL: gcc.dg/always_inline3.c (test for excess errors)
+FAIL: gcc.dg/inline-3.c scan-assembler-not big_function_2
+FAIL: gcc.dg/pr45083.c (test for warnings, line 12)
+FAIL: gcc.dg/pr78973-2.c ilp32 (test for warnings, line 16)
+FAIL: gcc.dg/stack-check-2.c scan-tree-dump-not optimized "tail call"
+FAIL: gcc.dg/stack-check-2.c scan-tree-dump-not tailc "tail call"
+FAIL: gcc.dg/uninit-19.c (test for warnings, line 14)
+FAIL: gcc.dg/uninit-19.c (test for excess errors)
+FAIL: gcc.dg/winline-3.c (test for warnings, line 5)
+FAIL: gcc.dg/winline-3.c (test for excess errors)
+FAIL: gcc.dg/winline-5.c (test for warnings, line 5)
+FAIL: gcc.dg/winline-5.c (test for excess errors)
+FAIL: gcc.dg/winline-6.c (test for warnings, line 5)
+FAIL: gcc.dg/winline-6.c (test for excess errors)
+FAIL: gcc.dg/winline-7.c (test for excess errors)
+FAIL: gcc.dg/winline-9.c (test for warnings, line 13)
+FAIL: gcc.dg/winline-9.c (test for excess errors)
+FAIL: gcc.dg/ipa/iinline-1.c scan-ipa-dump inline "hooray[^\\\\n]*inline copy
in test"
+FAIL: gcc.dg/ipa/iinline-1.c scan-ipa-dump inline "indirect_call"
+FAIL: gcc.dg/ipa/iinline-2.c scan-ipa-dump inline "hip2[^\\\\n]*inline copy in
main"
+FAIL: gcc.dg/ipa/iinline-2.c scan-ipa-dump inline "hooray[^\\\\n]*inline copy
in main"
+FAIL: gcc.dg/ipa/iinline-4.c scan-ipa-dump inline "hooray1[^\\\\n]*inline copy
in test1"
+FAIL: gcc.dg/ipa/iinline-4.c scan-ipa-dump inline "hooray2[^\\\\n]*inline copy
in test2"
+FAIL: gcc.dg/ipa/iinline-4.c scan-ipa-dump inline "hooray3[^\\\\n]*inline copy
in test3"
+FAIL: gcc.dg/ipa/iinline-4.c scan-ipa-dump inline "hooray4[^\\\\n]*inline copy
in test4"
+FAIL: gcc.dg/ipa/iinline-4.c scan-ipa-dump inline "hooray5[^\\\\n]*inline copy
in test5"
+FAIL: gcc.dg/ipa/iinline-4.c scan-ipa-dump inline "hooray6[^\\\\n]*inline copy
in test6"
+FAIL: gcc.dg/ipa/iinline-4.c scan-ipa-dump inline "hooray7[^\\\\n]*inline copy
in test7"
+FAIL: gcc.dg/ipa/iinline-attr.c scan-ipa-dump inline "hooray[^\\\\n]*inline
copy in test"
+FAIL: gcc.dg/ipa/iinline-cstagg-1.c scan-ipa-dump inline
"thisisthetarget[^\\\\n]*inline copy in outerfunction"
+FAIL: gcc.dg/ipa/iinline-cstagg-2.c scan-ipa-dump inline
"thisisthetarget[^\\\\n]*inline copy in outerfunction"
+FAIL: gcc.dg/ipa/inline-2.c scan-ipa-dump inline "op3 change 1.000000. of
time"
+FAIL: gcc.dg/ipa/inline-3.c scan-ipa-dump inline "Scaling time by
probability:0.100000"
+FAIL: gcc.dg/ipa/inline-4.c scan-ipa-dump inline "Inlined 1 calls, eliminated
0 functions"
+FAIL: gcc.dg/ipa/inline-4.c scan-ipa-dump-times inline "predicate: .false." 8
(found 0 times)
+FAIL: gcc.dg/ipa/inline-6.c scan-ipa-dump-times inline "Inlined into" 2 (found
0 times)
+FAIL: gcc.dg/ipa/inlinehint-1.c scan-ipa-dump inline "loop_iterations"
+FAIL: gcc.dg/ipa/inlinehint-2.c scan-ipa-dump inline "loop_stride"
+FAIL: gcc.dg/ipa/inlinehint-3.c scan-ipa-dump inline "in_scc"
+FAIL: gcc.dg/ipa/inlinehint-3.c scan-ipa-dump inline "same_scc"
+FAIL: gcc.dg/ipa/inlinehint-4.c scan-ipa-dump inline "Inlined lookup into
test"
+FAIL: gcc.dg/ipa/inlinehint-4.c scan-ipa-dump inline "Wrapper penalty"
+FAIL: gcc.dg/ipa/ipcp-agg-9.c scan-ipa-dump inline "hooray1[^\\\\n]*inline
copy in hiphip1"
+FAIL: gcc.dg/ipa/ipcp-ii-1.c scan-ipa-dump inline "hooray[^\\\\n]*inline copy
in hiphip.constprop"
+FAIL: gcc.dg/ipa/pr63416.c scan-tree-dump-not optimized "test_f3"
+FAIL: gcc.dg/ipa/pure-const-1.c scan-ipa-dump pure-const "found to be const:
i_am_const3"
+FAIL: gcc.dg/ipa/pure-const-1.c scan-tree-dump-times optimized "i_am_const3
.5" 1 (found 2 times)
+FAIL: gcc.dg/ipa/remref-0.c scan-ipa-dump inline "ipa-prop: Removed a
reference"
+FAIL: gcc.dg/ipa/remref-0.c scan-tree-dump-not optimized "hooray"
+FAIL: gcc.dg/ipa/remref-1a.c scan-ipa-dump inline "ipa-prop: Removed a
reference"
+FAIL: gcc.dg/ipa/remref-1a.c scan-tree-dump-not optimized "hooray"
+FAIL: gcc.dg/ipa/remref-1b.c scan-ipa-dump inline "ipa-prop: Removed a
reference"
+FAIL: gcc.dg/ipa/remref-1b.c scan-tree-dump-not optimized "hooray"
+FAIL: gcc.dg/ipa/remref-2a.c scan-ipa-dump-times inline "ipa-prop: Removed a
reference" 2 (found 0 times)
+FAIL: gcc.dg/ipa/remref-2a.c scan-tree-dump-not optimized "hooray"
+FAIL: gcc.dg/ipa/remref-2b.c scan-ipa-dump inline "ipa-prop: Removed a
reference"
+FAIL: gcc.dg/ipa/remref-2b.c scan-ipa-dump-times inline "ipa-prop: Removing
cloning-created reference" 2 (found 0 times)
+FAIL: gcc.dg/ipa/remref-2b.c scan-tree-dump-not optimized "hooray"
and many others.
>From gcc-bugs-return-582242-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 08:26:16 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/60243] IPA is slow on large cgraph tree
Date: Mon, 20 Nov 2017 08:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60243
--- Comment #20 from rguenther at suse dot de <rguenther at suse dot de> ---
On Sun, 19 Nov 2017, hubicka at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60243
>
> --- Comment #19 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
> Author: hubicka
> Date: Sun Nov 19 18:55:30 2017
> New Revision: 254934
>
> URL: https://gcc.gnu.org/viewcvs?rev=254934&root=gcc&view=rev
> Log:
> PR ipa/60243
> * tree-inline.c (estimate_num_insns): Set to 1 at least.
>
> Modified:
> trunk/gcc/ChangeLog
> trunk/gcc/tree-inline.c
While this fixes the new regression the appearant IPA SRA quadraticness
remains.
I'll add the testcase to our "random" set of testcases in the C++ bench.
>From gcc-bugs-return-582243-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 08:30:17 2017
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/82020] ICE in decompose at rtl.h:2126
Date: Mon, 20 Nov 2017 08:30:00 -0000
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
Patch committed to trunk, test-case not required.
Marking resolved-fixed.
>From gcc-bugs-return-582244-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 08:33:48 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83060] ICE on valid C++ code: in ignore_overflows, at cp/cvt.c:583
Date: Mon, 20 Nov 2017 08:33:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-20
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Guess we should diagnose and return error_mark_node from fold_offsetof_1. Will
have a look.
>From gcc-bugs-return-582245-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 08:35:54 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83059] ICE on invalid C++ code: in tree_to_uhwi, at tree.c:6633
Date: Mon, 20 Nov 2017 08:35:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-20
CC| |jakub at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
get_atomic_generic_size bug, will fix.
>From gcc-bugs-return-582246-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 08:38:22 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83041] redundant assignment from member array not eliminated
Date: Mon, 20 Nov 2017 08:38:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Both references get alias-set zero. Given we do not know the dynamic type of
'a'
there can be very well a struct A live at that point which means p might point
to a. For g there cannot be a B at a because it won't fit.
We do not figure the "redundant" assignments because we're not able to
CSE p->a[0] to the previous a[0] store. This "trick" is not implemented.
I think we have a duplicate bug for this looking like
void foo (int *p, int *q)
{
*p = 1;
*q = 1;
return *p;
}
which we should be able to optimize to return 1.
>From gcc-bugs-return-582247-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 08:41:42 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug preprocessor/83063] New: [8 Regression] ICE on an invalid preprocessor snippet
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83063
Bug ID: 83063
Summary: [8 Regression] ICE on an invalid preprocessor snippet
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Starting from r254707 we do an invalid read on:
$ cat ice.cpp
#define a(...) b##__VA_OPT__ ()
a ()
$ valgrind --leak-check=yes --trace-children=yes g++ ice.cpp
==18518== Memcheck, a memory error detector
==18518== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==18518== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==18518== Command: g++ ice.cpp
==18518==
==18520== Memcheck, a memory error detector
==18520== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==18520== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==18520== Command:
/home/marxin/bin/gcc/lib/gcc/x86_64-pc-linux-gnu/8.0.0/cc1plus -quiet
-D_GNU_SOURCE ice.cpp -quiet -dumpbase ice.cpp -mtune=generic -march=x86-64
-auxbase ice -o /tmp/ccqffetG.s
==18520==
==18520== Use of uninitialised value of size 8
==18520== at 0x16C6D0B: paste_all_tokens (macro.c:889)
==18520== by 0x16C6D0B: cpp_get_token_1(cpp_reader*, unsigned int*)
(macro.c:2636)
==18520== by 0x8CE7AE: c_lex_with_flags(tree_node**, unsigned int*, unsigned
char*, int) (c-lex.c:399)
==18520== by 0x75164E: cp_lexer_get_preprocessor_token(cp_lexer*, cp_token*)
(parser.c:793)
==18520== by 0x792E23: cp_parser_initial_pragma (parser.c:38614)
==18520== by 0x792E23: cp_lexer_new_main (parser.c:647)
==18520== by 0x792E23: cp_parser_new (parser.c:3859)
==18520== by 0x792E23: c_parse_file() (parser.c:39019)
==18520== by 0x8DA226: c_common_parse_file() (c-opts.c:1127)
==18520== by 0xDC0C8E: compile_file() (toplev.c:455)
==18520== by 0x60A5E4: do_compile (toplev.c:2059)
==18520== by 0x60A5E4: toplev::main(int, char**) (toplev.c:2194)
==18520== by 0x60C8AA: main (main.c:39)
==18520==
==18520== Invalid read of size 1
==18520== at 0x16C6D0B: paste_all_tokens (macro.c:889)
==18520== by 0x16C6D0B: cpp_get_token_1(cpp_reader*, unsigned int*)
(macro.c:2636)
==18520== by 0x8CE7AE: c_lex_with_flags(tree_node**, unsigned int*, unsigned
char*, int) (c-lex.c:399)
==18520== by 0x75164E: cp_lexer_get_preprocessor_token(cp_lexer*, cp_token*)
(parser.c:793)
==18520== by 0x792E23: cp_parser_initial_pragma (parser.c:38614)
==18520== by 0x792E23: cp_lexer_new_main (parser.c:647)
==18520== by 0x792E23: cp_parser_new (parser.c:3859)
==18520== by 0x792E23: c_parse_file() (parser.c:39019)
==18520== by 0x8DA226: c_common_parse_file() (c-opts.c:1127)
==18520== by 0xDC0C8E: compile_file() (toplev.c:455)
==18520== by 0x60A5E4: do_compile (toplev.c:2059)
==18520== by 0x60A5E4: toplev::main(int, char**) (toplev.c:2194)
==18520== by 0x60C8AA: main (main.c:39)
==18520== Address 0x4 is not stack'd, malloc'd or (recently) free'd
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Subject: [Bug target/82852] [8 regression] i386/vect-unpack-1.c, i386/avx512f-gather-2.c, i386/avx256-unaligned-store-2.c fails
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--- Comment #2 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Yeah, seems like it`s gone.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82851] [8 regression] g++.dg/vect/slp-pr56812.cc, i386/avx2-vpaddq-3.c, i386/avx2-vpsubq-3.c fails
Date: Mon, 20 Nov 2017 08:43:00 -0000
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Andrey Guskov <andrey.y.guskov at intel dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Yes.
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Subject: [Bug target/82852] [8 regression] i386/vect-unpack-1.c, i386/avx512f-gather-2.c, i386/avx256-unaligned-store-2.c fails
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Andrey Guskov <andrey.y.guskov at intel dot com> changed:
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----------------------------------------------------------------------------
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Priority|P3 |P1
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--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Started with r54937.
Another testcase:
trippels@gcc2-power8 ~ % cat scavenger.ii
struct A {
virtual void VisitPointers(int *, int **, int **) = 0;
virtual void VisitNextCodeLink() { VisitPointers(0, 0, 0); }
};
struct B : A {
__attribute__((always_inline)) void VisitPointers(int *, int **, int **);
};
void B::VisitPointers(int *, int **, int **) {}
trippels@gcc2-power8 ~ % g++ -O3 -c scavenger.ii
scavenger.ii:8:6: warning: always_inline function might not be inlinable
[-Wattributes]
void B::VisitPointers(int *, int **, int **) {}
^
scavenger.ii: In member function ‘virtual void A::VisitNextCodeLink()’:
scavenger.ii:8:6: error: inlining failed in call to always_inline ‘virtual void
B::VisitPointers(int*, int**, int**)’: caller is not optimized
scavenger.ii:3:51: note: called from here
virtual void VisitNextCodeLink() { VisitPointers(0, 0, 0); }
~~~~~~~~~~~~~^~~~~~~~~
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--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Sorry, started with r254937.
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Subject: [Bug rtl-optimization/82180] assign_spill_hard_regs spills to unaligned register pair
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kcy at codesourcery dot com
--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #0)
> Trying a bit harder, I can fix the problem by skipping over the unaligned
> register here:
> ...
> diff --git a/gcc/lra-spills.c b/gcc/lra-spills.c
> index 492fc18..6ecfad2 100644
> --- a/gcc/lra-spills.c
> +++ b/gcc/lra-spills.c
> @@ -276,7 +276,10 @@ assign_spill_hard_regs (int *pseudo_regnos, int n)
> for (k = 0; k < spill_class_size; k++)
> {
> hard_regno = ira_class_hard_regs[spill_class][k];
> - if (! overlaps_hard_reg_set_p (conflict_hard_regs, mode,
> hard_regno))
> + if (!
> ira_prohibited_class_mode_regs[spill_class][PSEUDO_REGNO_MODE (regno)]
> + && ! overlaps_hard_reg_set_p (conflict_hard_regs, mode,
> + hard_regno))
> break;
> }
> if (k >= spill_class_size)
> ...
>
Kwok has pointed out that in fact ira_prohibited_class_mode_regs is a
HARD_REG_SET which needs to be tested using TEST_HARD_REG_BIT.
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83053] [8 Regression] ICE in vrp_prop::check_array_ref at cc/tree-vrp.c:4811
Date: Mon, 20 Nov 2017 09:13:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
I see in tree-vrp.c:4804:
(gdb) p print_generic_expr(stderr, ref, 0)
*array.0_159[0]$10 = void
(gdb) p debug_tree(ref)
<array_ref 0x7ffff69f2d20
type <record_type 0x7ffff69bc9d8 myclass BLK
size <integer_cst 0x7ffff6813c60 constant 0>
unit-size <integer_cst 0x7ffff6813c18 constant 0>
align:8 warn_if_not_align:0 symtab:0 alias-set 8 canonical-type
0x7ffff69bc9d8 context <namespace_decl 0x7ffff69b9da8 myclass_def>
pointer_to_this <pointer_type 0x7ffff69bcc78> chain <type_decl
0x7ffff69e1b48 D.3768>>
arg:0 <mem_ref 0x7ffff6a06168
type <array_type 0x7ffff69cae70 type <record_type 0x7ffff69bc9d8
myclass>
type_2 BLK size <integer_cst 0x7ffff6813c60 0> unit-size
<integer_cst 0x7ffff6813c18 0>
align:8 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7ffff69cae70 domain <integer_type 0x7ffff69ca738>
pointer_to_this <pointer_type 0x7ffff69ca5e8>>
arg:0 <ssa_name 0x7ffff66221f8 type <pointer_type 0x7ffff69ca690>
visited var <var_decl 0x7ffff69d1360 array.0>
def_stmt array.0_159 = *array_281._data.data;
version:159
ptr-info 0x7ffff6639528>
arg:1 <integer_cst 0x7ffff69f9258 constant 0>
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90:97:0
start:
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90:97:0
finish:
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90:97:0>
arg:1 <integer_cst 0x7ffff682f288 type <integer_type 0x7ffff6827738
integer(kind=8)> constant 0>
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90:97:0
start:
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90:97:0
finish:
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90:97:0>
$ (gdb) p debug_tree((tree)0x7ffff69cae70)
<array_type 0x7ffff69cae70
type <record_type 0x7ffff69bc9d8 myclass BLK
size <integer_cst 0x7ffff6813c60 constant 0>
unit-size <integer_cst 0x7ffff6813c18 constant 0>
align:8 warn_if_not_align:0 symtab:0 alias-set 8 canonical-type
0x7ffff69bc9d8 context <namespace_decl 0x7ffff69b9da8 myclass_def>
pointer_to_this <pointer_type 0x7ffff69bcc78> chain <type_decl
0x7ffff69e1b48 D.3768>>
type_2 BLK size <integer_cst 0x7ffff6813c60 0> unit-size <integer_cst
0x7ffff6813c18 0>
align:8 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7ffff69cae70
domain <integer_type 0x7ffff69ca738
type <integer_type 0x7ffff6827738 integer(kind=8) public DI
size <integer_cst 0x7ffff6813be8 constant 64>
unit-size <integer_cst 0x7ffff6813c00 constant 8>
align:64 warn_if_not_align:0 symtab:0 alias-set 11 canonical-type
0x7ffff6827738 precision:64 min <integer_cst 0x7ffff6813e70
-9223372036854775808> max <integer_cst 0x7ffff6813e88 9223372036854775807>
pointer_to_this <pointer_type 0x7ffff685b888>>
DI size <integer_cst 0x7ffff6813be8 64> unit-size <integer_cst
0x7ffff6813c00 8>
align:64 warn_if_not_align:0 symtab:0 alias-set -1 structural-equality
precision:64 min <integer_cst 0x7ffff682f288 0> max <var_decl 0x7ffff69dbbd0
D.3717>>
pointer_to_this <pointer_type 0x7ffff69ca5e8>>
(gdb) p debug_tree(maxbound)
<integer_cst 0x7ffff6813e88 type <integer_type 0x7ffff6827738 integer(kind=8)>
constant 9223372036854775807>
$13 = void
(gdb) p debug_tree(eltsize)
<integer_cst 0x7ffff6813c18 type <integer_type 0x7ffff6827000 sizetype>
constant 0>
Thus there's division by zero and we end up with up_bound_p1 == NULL_TREE.
I'm testing that with r254943 with:
./f951
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/actual_array_offset_1.f90
-quiet -dumpbase actual_array_offset_1.f90 -mtune=generic -march=x86-64
-auxbase actual_array_offset_1 -O2 -Warray-bounds=1 -version
-fintrinsic-modules-path finclude -o /tmp/ccU1hBES.s
>From gcc-bugs-return-582254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 09:13:13 2017
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Subject: [Bug tree-optimization/83043] [8 Regression] FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times graphite "2 loops carried no dependency" 1 (found 0 times)
Date: Mon, 20 Nov 2017 09:13:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
Summary|FAIL: |[8 Regression] FAIL:
|libgomp.graphite/force-para |libgomp.graphite/force-para
|llel-1.c |llel-1.c
|scan-tree-dump-times |scan-tree-dump-times
|graphite "2 loops carried |graphite "2 loops carried
|no dependency" 1 (found 0 |no dependency" 1 (found 0
|times) |times)
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Possibly some optimize_loop_nest_for_speed check changes.
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Subject: [Bug tree-optimization/83044] [8 Regression] ice in contains_struct_check
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |msebor at gcc dot gnu.org
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Summary|ice in |[8 Regression] ice in
|contains_struct_check |contains_struct_check
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Subject: [Bug rtl-optimization/82180] assign_spill_hard_regs spills to unaligned register pair
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--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 42656
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42656&action=edit
Tentative patch
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Subject: [Bug tree-optimization/83047] [8 regression] glibc/crypt/crypt_util.c gets miscompiled
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug c++/83045] [8 Regression] -Wreturn-type regression in C++
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
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Summary|-Wreturn-type regression in |[8 Regression]
|C++ |-Wreturn-type regression in
| |C++
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Subject: [Bug c++/83049] Allow overloading of ?: conditional operator
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Subject: [Bug target/83052] [8 Regression] ICE in extract_insn, at recog.c:2305 starting from r254560
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
Version|7.0 |8.0
Target Milestone|--- |8.0
Summary|ICE in extract_insn, at |[8 Regression] ICE in
|recog.c:2305 starting from |extract_insn, at
|r254560 |recog.c:2305 starting from
| |r254560
>From gcc-bugs-return-582263-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 09:19:42 2017
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Subject: [Bug ipa/83054] [8 Regression] ICE in operator>, at profile-count.h:823
Date: Mon, 20 Nov 2017 09:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|7.0 |8.0
Target Milestone|--- |8.0
>From gcc-bugs-return-582261-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 09:19:07 2017
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Subject: [Bug ipa/83051] [8 Regression] ICE on valid code at -O3: in edge_badness, at ipa-inline.c:1024
Date: Mon, 20 Nov 2017 09:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
Version|unknown |8.0
Target Milestone|--- |8.0
Summary|ICE on valid code at -O3: |[8 Regression] ICE on valid
|in edge_badness, at |code at -O3: in
|ipa-inline.c:1024 |edge_badness, at
| |ipa-inline.c:1024
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Subject: [Bug c++/83058] [8 Regression] ICE on C++ code with negative array index: in warn_placement_new_too_small, at cp/init.c:2666
Date: Mon, 20 Nov 2017 09:20:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
Summary|ICE on C++ code with |[8 Regression] ICE on C++
|negative array index: in |code with negative array
|warn_placement_new_too_smal |index: in
|l, at cp/init.c:2666 |warn_placement_new_too_smal
| |l, at cp/init.c:2666
>From gcc-bugs-return-582265-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 09:36:06 2017
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From: "cfztol at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83064] New: DO CONCURRENT inconsistent results
Date: Mon, 20 Nov 2017 09:36:00 -0000
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Bug ID: 83064
Summary: DO CONCURRENT inconsistent results
Product: gcc
Version: 8.0
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Assignee: unassigned at gcc dot gnu.org
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This bug is related to 83017. I'm trying to parallelize a pure function with
the do concurrent construct. The following table shows compile flags and
results from the test program at the end of this message. GCC revision r254890:
Unrolled do-loop
Options Parallel Correct
-Og -ftree-parallelize-loops=2 N Y
-O1 -ftree-parallelize-loops=2 Y N - arbitrary
-O2 -ftree-parallelize-loops=2 Y N - always zero
-O3 -ftree-parallelize-loops=2 Y Y
-Ofast -ftree-parallelize-loops=2 Y Y
Modulo inside do-loop, or Indexed via host associated array
Options Parallel Correct
-Og -ftree-parallelize-loops=2 N Y
-O1 -ftree-parallelize-loops=2 Y N - arbitrary
-O2 -ftree-parallelize-loops=2 Y N - arbitrary
-O3 -ftree-parallelize-loops=2 Y N - arbitrary
-Ofast -ftree-parallelize-loops=2 Y N - arbitrary
So the loop is parallelized always, unless -Og optimization level is used.
However, the computed value of PI is only correct in a few cases, depending of
optimization level and details of the pure function. I think that is a bug -
especially since consecutive runs give different results (marked with
"arbitrary" in the table above).
Here's my test program:
program main
use, intrinsic :: iso_fortran_env
implicit none
integer, parameter :: nsplit = 4
integer(int64), parameter :: ne = 200000000
integer(int64) :: stride, low(nsplit), high(nsplit), edof(ne), i
real(real64), dimension(nsplit) :: pi
edof(1::4) = 1
edof(2::4) = 2
edof(3::4) = 3
edof(4::4) = 4
stride = ceiling(real(ne)/nsplit)
do i = 1, nsplit
high(i) = stride*i
end do
do i = 2, nsplit
low(i) = high(i-1) + 1
end do
low(1) = 1
high(nsplit) = ne
pi = 0
do concurrent (i = 1:nsplit)
pi(i) = sum(compute( low(i), high(i) ))
end do
print *, "PI", 4*sum(pi)
print *, "PI", 4*atan(1.0)
contains
pure function compute( low, high ) result( tmp )
integer(int64), intent(in) :: low, high
real(real64), dimension(nsplit) :: tmp
integer(int64) :: j, k
tmp = 0
! Unrolled loop
! do j = low, high, 4
! k = 1
! tmp(k) = tmp(k) + (-1)**(j+1) / real( 2*j-1 )
! k = 2
! tmp(k) = tmp(k) + (-1)**(j+2) / real( 2*j+1 )
! k = 3
! tmp(k) = tmp(k) + (-1)**(j+3) / real( 2*j+3 )
! k = 4
! tmp(k) = tmp(k) + (-1)**(j+4) / real( 2*j+5 )
! end do
! Loop with modulo operation
! do j = low, high
! k = mod( j, nsplit ) + 1
! tmp(k) = tmp(k) + (-1)**(j+1) / real( 2*j-1 )
! end do
! Loop with subscripting via host association
do j = low, high
k = edof(j)
tmp(k) = tmp(k) + (-1.0_real64)**(j+1) / real( 2*j-1 )
end do
end function
end program main
>From gcc-bugs-return-582266-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 09:41:28 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83008] [performance] Is it better to avoid extra instructions in data passing between loops?
Date: Mon, 20 Nov 2017 09:41:00 -0000
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Sun, 19 Nov 2017, hubicka at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83008
>
> Jan Hubicka <hubicka at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|UNCONFIRMED |NEW
> Last reconfirmed| |2017-11-19
> Ever confirmed|0 |1
>
> --- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
> I now get fir first loop:
>
>
> a.c:6:5: note: Cost model analysis:
> Vector inside of loop cost: 1120
> Vector prologue cost: 0
> Vector epilogue cost: 0
> Scalar iteration cost: 328
> Scalar outside cost: 0
> Vector outside cost: 0
> prologue iterations: 0
> epilogue iterations: 0
> Calculated minimum iters for profitability: 0
> a.c:6:5: note: Runtime profitability threshold = 4
> a.c:6:5: note: Static estimate profitability threshold = 4
>
> For second lop I get:
>
> a.c:20:5: note: type of def: internal
> a.c:20:5: note: mark relevant 1, live 0: sum.0_60 = (unsigned int) sum_102;
> a.c:20:5: note: worklist: examine stmt: sum.0_60 = (unsigned int) sum_102;
> a.c:20:5: note: vect_is_simple_use: operand sum_102
> a.c:20:5: note: def_stmt: sum_102 = PHI <0(6), sum_75(7)>
> a.c:20:5: note: type of def: unknown
> a.c:20:5: note: Unsupported pattern.
> a.c:20:5: note: not vectorized: unsupported use in stmt.
> a.c:20:5: note: unexpected pattern.
>
> Is it really that hard to sum values in vector?
The issue is the vectorizer doesn't currently handle conversions:
t.c:20:5: note: Analyze phi: sum_102 = PHI <0(6), sum_75(7)>
t.c:20:5: note: reduction: not commutative/associative: sum_75 = (int)
_61;
I have patches to fix that though. Sitting somewhere... see PR65930.
>From gcc-bugs-return-582267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 09:41:48 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83040] __attribute__((always_inline)) causes internal_compiler_error (segmentation fault) (with recursive meta-template programming function)
Date: Mon, 20 Nov 2017 09:41:00 -0000
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What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-20
Ever confirmed|0 |1
Known to fail| |7.2.1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
"don't do this"? Or use constexpr? That you need to bump the template-depth
should already tell you you're doing sth that's bad.
Anyway, confirmed with GCC 7.2, note that GCC 5 is no longer maintained.
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Subject: [Bug lto/83061] -Wmaybe-uninitialized warnings in gcc/lto/lto-object.c
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Well, the warnings are false positives given the uses are guarded with an error
check (that can never trigger due to implementation details).
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Subject: [Bug tree-optimization/83047] [8 regression] glibc/crypt/crypt_util.c gets miscompiled
Date: Mon, 20 Nov 2017 09:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83047
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-20
Ever confirmed|0 |1
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Heh, what a coincidence! This is something I run into while working on the
bswap store-merging support, from wondering why bswap pass needs dominance info
I've noticed it uses it exactly to pick the last from the loads rather than say
the first one if it is in multiple basic blocks and added to my todo list that
that is something needed for the store merging itself too.
Note, it probably isn't sufficient, we could have:
int a = q[0];
foo (a); /* Some function that conditionally exits, throws externally or
loops forever. */
int b = q[1]; /* q[1] might not be mapped if foo exits/throws/loops forever.
*/
p[0] = a;
p[1] = b;
Wonder if we need to (perhaps lazily) compute uids of stmts in certain bbs and
use that to compute which of the loads is last.
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
I think it's a typo, should be:
diff --git a/gcc/ipa-inline.c b/gcc/ipa-inline.c
index 4f1860fb284..2c2706897d9 100644
--- a/gcc/ipa-inline.c
+++ b/gcc/ipa-inline.c
@@ -325,7 +325,7 @@ can_inline_edge_p (struct cgraph_edge *e, bool report,
inlinable = false;
}
if (!early && (!opt_for_fn (callee->decl, optimize)
- || opt_for_fn (caller->decl, optimize)))
+ || !opt_for_fn (caller->decl, optimize)))
{
e->inline_failed = CIF_FUNCTION_NOT_OPTIMIZED;
inlinable = false;
Honza?
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Subject: [Bug tree-optimization/83047] [8 regression] glibc/crypt/crypt_util.c gets miscompiled
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83047
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42657
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42657&action=edit
gcc8-pr83047.patch
Untested fix.
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83065] New: [8 Regression] SPEC CPU2017 523/623 compfail (ICE)
Date: Mon, 20 Nov 2017 09:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83065
Bug ID: 83065
Summary: [8 Regression] SPEC CPU2017 523/623 compfail (ICE)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: andrey.y.guskov at intel dot com
CC: marxin at gcc dot gnu.org
Target Milestone: ---
r254834 triggers this fail @ 523/623 base6, both on Intel Haswell and Intel
Silvermont:
during IPA pass: inline
lto1: internal compiler error: in to_cgraph_frequency, at profile-count.c:252
0x66f1a5 profile_count::to_cgraph_frequency(profile_count) const
../../../gcc/gcc/profile-count.c:252
0xb0f819 cgraph_edge::frequency()
../../../gcc/gcc/cgraph.h:3121
0xb0f819 ipa_propagate_frequency_1
../../../gcc/gcc/ipa-profile.c:343
0xb0fc4d cgraph_node::call_for_symbol_and_aliases(bool (*)(cgraph_node*,
void*), void*, bool)
../../../gcc/gcc/cgraph.h:3216
0xb0fc4d ipa_propagate_frequency(cgraph_node*)
../../../gcc/gcc/ipa-profile.c:411
0xafcbf9 inline_update_callee_summaries
../../../gcc/gcc/ipa-fnsummary.c:2833
0xafcd33 inline_update_callee_summaries
../../../gcc/gcc/ipa-fnsummary.c:2837
0xafcd33 inline_update_callee_summaries
../../../gcc/gcc/ipa-fnsummary.c:2837
0xafcd33 inline_update_callee_summaries
../../../gcc/gcc/ipa-fnsummary.c:2837
0xafdea9 ipa_merge_fn_summary_after_inlining(cgraph_edge*)
../../../gcc/gcc/ipa-fnsummary.c:3083
0x13bc7d4 inline_call(cgraph_edge*, bool, vec<cgraph_edge*, va_heap, vl_ptr>*,
int*, bool, bool*)
../../../gcc/gcc/ipa-inline-transform.c:448
0x13b4f7a inline_small_functions
../../../gcc/gcc/ipa-inline.c:2033
0x13b4f7a ipa_inline
../../../gcc/gcc/ipa-inline.c:2441
0x13b4f7a execute
../../../gcc/gcc/ipa-inline.c:2848
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper: fatal error: g++ returned 1 exit status
compilation terminated.
/bin/ld: lto-wrapper failed
collect2: error: ld returned 1 exit status
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/6023] Unhelpful error message with forgotten "template"
Date: Mon, 20 Nov 2017 09:54:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|SUSPENDED |RESOLVED
CC|klaus.kretschel at dlr dot de |
Resolution|--- |FIXED
--- Comment #9 from Paolo Carlini <paolo.carlini at oracle dot com> ---
I think we can close this one.
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--- Comment #6 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Mon Nov 20 09:55:02 2017
New Revision: 254946
URL: https://gcc.gnu.org/viewcvs?rev=254946&root=gcc&view=rev
Log:
PR bootstrap/83062
* ipa-inline.c (can_inline_edge_p): Fix typo in previous patch.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-inline.c
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Thanks for the quick fix.
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Mon, 20 Nov 2017 10:11:00 -0000
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--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Nov 20 10:10:23 2017
New Revision: 254948
URL: https://gcc.gnu.org/viewcvs?rev=254948&root=gcc&view=rev
Log:
PR tree-optimization/78821
* gimple-ssa-store-merging.c (find_bswap_or_nop_load): Give up
if base is TARGET_MEM_REF. If base is not MEM_REF, set base_addr
to the address of the base rather than the base itself.
(find_bswap_or_nop_1): Just use pointer comparison for vuse check.
(find_bswap_or_nop_finalize): New function.
(find_bswap_or_nop): Use it.
(bswap_replace): Return a tree rather than bool, change first
argument from gimple * to gimple_stmt_iterator, allow inserting
into an empty sequence, allow ins_stmt to be NULL - then emit
all stmts into gsi. Fix up MEM_REF address gimplification.
(pass_optimize_bswap::execute): Adjust bswap_replace caller.
(struct store_immediate_info): Add N and INS_STMT non-static
data members.
(store_immediate_info::store_immediate_info): Initialize them
from newly added ctor args.
(merged_store_group::apply_stores): Formatting fixes. Sort by
bitpos at the end.
(stmts_may_clobber_ref_p): For stores call also
refs_anti_dependent_p.
(gather_bswap_load_refs): New function.
(imm_store_chain_info::try_coalesce_bswap): New method.
(imm_store_chain_info::coalesce_immediate_stores): Use it.
(split_group): Handle LROTATE_EXPR and NOP_EXPR rhs_code specially.
(imm_store_chain_info::output_merged_store): Fail if number of
new estimated stmts is bigger or equal than old. Handle LROTATE_EXPR
and NOP_EXPR rhs_code.
(pass_store_merging::process_store): Compute n and ins_stmt, if
ins_stmt is non-NULL and the store rhs is otherwise invalid, use
LROTATE_EXPR rhs_code. Pass n and ins_stmt to store_immediate_info
ctor.
(pass_store_merging::execute): Calculate dominators.
* gcc.dg/store_merging_16.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/store_merging_16.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-store-merging.c
trunk/gcc/testsuite/ChangeLog
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83045] [8 Regression] -Wreturn-type regression in C++
Date: Mon, 20 Nov 2017 10:12:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-20
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, problem is following: before the patch we emitted return statement
that was caught in tree-cfg.c. Now we end up with:
test2 (int a)
{
<bb 2> :
if (a != 0)
goto <bb 3>; [INV]
else
goto <bb 4>; [INV]
<bb 3> :
__builtin_abort ();
<bb 4> :
__builtin_unreachable ();
}
Thus the warnings in tree-cfg can't see that. On the other hand, having a
function that doesn't do an abnormal return:
test2 (int a)
{
<bb 2> :
if (a != 0)
goto <bb 3>; [INV]
else
goto <bb 4>; [INV]
<bb 3> :
foo ();
<bb 4> :
__builtin_unreachable ();
}
C++ FE warning is triggered:
/home/marxin/Programming/testcases/pr83045-2.c: In function ‘int test2(int)’:
/home/marxin/Programming/testcases/pr83045-2.c:15:1: warning: no return
statement in function returning non-void [-Wreturn-type]
That said, I don't know how to fix that properly?
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Subject: [Bug tree-optimization/83053] [8 Regression] ICE in vrp_prop::check_array_ref at cc/tree-vrp.c:4811
Date: Mon, 20 Nov 2017 10:13:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
The origin PR contains more easier C test-case.
*** This bug has been marked as a duplicate of bug 83044 ***
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Subject: [Bug tree-optimization/83044] [8 Regression] ice in contains_struct_check
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 83053 has been marked as a duplicate of this bug. ***
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
Date: Mon, 20 Nov 2017 10:17:00 -0000
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--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Terbium however now fails with
In file included from
/gcc/spec/sb-terbium-head-64/gcc/libgcc/config/ia64/unwind-ia64.c:2448:
/gcc/spec/sb-terbium-head-64/gcc/libgcc/unwind.inc: In function
'_Unwind_Resume_or_Rethrow':
/gcc/spec/sb-terbium-head-64/gcc/libgcc/unwind.inc:273:3: error: too many
arguments to function 'uw_install_context'
uw_install_context (&this_context, &cur_context, frames);
^~~~~~~~~~~~~~~~~~
/gcc/spec/sb-terbium-head-64/gcc/libgcc/config/ia64/unwind-ia64.c:2167:1: note:
declared here
uw_install_context (struct _Unwind_Context *current __attribute__((unused)),
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Subject: [Bug libstdc++/83066] New: [8 regression] 26_numerics/gcd/gcd_neg.cc fails since r254736
Date: Mon, 20 Nov 2017 10:18:00 -0000
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Bug ID: 83066
Summary: [8 regression] 26_numerics/gcd/gcd_neg.cc fails since
r254736
Product: gcc
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Hi,
Since r254736 I have noticed that gcd_neg.cc now fails on:
26_numerics/gcd/gcd_neg.cc (test for errors, line 30)
26_numerics/gcd/gcd_neg.cc (test for errors, line 138)
26_numerics/gcd/gcd_neg.cc (test for errors, line 36)
26_numerics/gcd/gcd_neg.cc (test for errors, line 40)
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----------------------------------------------------------------------------
CC| |igor.v.tsimbalist at intel dot com
--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Igor, the unwind issue seems to be yours.
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Subject: [Bug c++/55826] -ftime-report causes internal compiler error with Boost.Asio
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Closing as fixed. I can't reproduce the issue anymore, anywhere. Otherwise,
please re-open.
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Subject: [Bug c++/83060] ICE on valid C++ code: in ignore_overflows, at cp/cvt.c:583
Date: Mon, 20 Nov 2017 10:38:00 -0000
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Related to PR82872?
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Subject: [Bug lto/83061] -Wmaybe-uninitialized warnings in gcc/lto/lto-object.c
Date: Mon, 20 Nov 2017 10:41:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Yes, it was caused by Honza's inliner typo.
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Mon, 20 Nov 2017 10:45:00 -0000
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--- Comment #17 from Uroš Bizjak <ubizjak at gmail dot com> ---
Hm, even with the latest patch, the testcase from comment #5:
typedef __SIZE_TYPE__ size_t;
void baz (char *buf, unsigned int data)
{
buf[0] = data;
buf[1] = data >> 8;
buf[2] = ~data >> 8;
buf[3] = ~data;
}
still compiles to:
movl %esi, %eax
movw %si, (%rdi)
notl %esi
notl %eax
movb %sil, 3(%rdi)
movb %ah, 2(%rdi)
ret
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Subject: [Bug c++/83046] ICE in nvptx offloading, C++ compilation of libgomp.oacc-c-c++-common/gang-static-2.c
Date: Mon, 20 Nov 2017 10:49:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Thomas Schwinge from comment #0)
> ... starting with r254437 "Instrument function exit with
> __builtin_unreachable in C++".
>
> Program received signal SIGSEGV, Segmentation fault.
> input_offload_tables (do_force_output=true) at
> [...]/source-gcc/gcc/lto-cgraph.c:1942
> 1942 varpool_node::get (var_decl)->force_output = 1;
> (gdb) bt
> #0 input_offload_tables (do_force_output=true) at
> [...]/source-gcc/gcc/lto-cgraph.c:1942
> #1 0x00000000005a0927 in read_cgraph_and_symbols (fnames=<optimized
> out>, nfiles=<optimized out>) at [...]/source-gcc/gcc/lto/lto.c:2863
> #2 lto_main () at [...]/source-gcc/gcc/lto/lto.c:3314
> #3 0x0000000000a7f63f in compile_file () at
> [...]/source-gcc/gcc/toplev.c:455
> #4 0x000000000056ef20 in do_compile () at
> [...]/source-gcc/gcc/toplev.c:2059
> #5 toplev::main (this=this@entry=0x7fffffffcfb0, argc=argc@entry=15,
> argv=0x17908e0, argv@entry=0x7fffffffd0b8) at
> [...]/source-gcc/gcc/toplev.c:2194
> #6 0x0000000000571457 in main (argc=15, argv=0x7fffffffd0b8) at
> [...]/source-gcc/gcc/main.c:39
>
> Obviously, that test case has a "-Wreturn-type mismatch" (which is not
> diagnosed for C++; see reduced PR83045), and fixing that cures this nvptx
> offloading ICE.
Hello.
Can you please provide steps to reproduce this?
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
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--- Comment #5 from igor.v.tsimbalist at intel dot com ---
Created attachment 42658
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42658&action=edit
patch
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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--- Comment #18 from Uroš Bizjak <ubizjak at gmail dot com> ---
Maybe related to bswap optimization is also:
typedef __SIZE_TYPE__ size_t;
void baz (char *buf, unsigned int data)
{
buf[0] = data >> 8;
buf[1] = data;
}
which currently generates (-O2 -march=haswell)
rolw $8, %si
movw %si, (%rdi)
but could use "movbew %si, (%rdi)".
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
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--- Comment #6 from igor.v.tsimbalist at intel dot com ---
Andreas has sent this issue as a reply to my commit. I proposed a fix and asked
for approval. Here is my reply
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01647.html
I have attached the patch also.
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Subject: [Bug ipa/83065] [8 Regression] SPEC CPU2017 523/623 compfail (ICE)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
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Subject: [Bug preprocessor/83063] [8 Regression] ICE on an invalid preprocessor snippet
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Subject: [Bug libstdc++/83066] [8 regression] 26_numerics/gcd/gcd_neg.cc fails since r254736
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Subject: [Bug tree-optimization/83055] [8 Regression] ICE in operator>, at profile-count.h:834
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Subject: [Bug fortran/65381] [6/7/8 Regression] ICE during array result, assignment
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Subject: [Bug debug/81155] [8 Regression] Debug make check regressions in GCC 8.0
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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|regressions in GCC 8.0 |check regressions in GCC
| |8.0
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Subject: [Bug c++/83059] ICE on invalid C++ code: in tree_to_uhwi, at tree.c:6633
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42659
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42659&action=edit
gcc8-pr83059.patch
Untested fix.
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Subject: [Bug tree-optimization/81165] [8 Regression] Regression in GCC-8.0.0's optimizer
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|optimizer |in GCC-8.0.0's optimizer
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Subject: [Bug fortran/82969] [6/7/8 Regression] ICE in gfc_class_vptr_get, at fortran/trans-expr.c:211
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #17)
> Hm, even with the latest patch, the testcase from comment #5:
> still compiles to:
>
> movl %esi, %eax
> movw %si, (%rdi)
> notl %esi
> notl %eax
> movb %sil, 3(%rdi)
> movb %ah, 2(%rdi)
> ret
The reason for that is that the IL is something the bswap framework can't
handle. Let's look just at the simplified:
void baz (char *buf, unsigned int data)
{
buf[2] = ~data >> 8;
buf[3] = ~data;
}
_1 = ~data_6(D);
_2 = _1 >> 8;
_3 = (char) _2;
MEM[(char *)buf_7(D) + 2B] = _3;
_4 = (char) data_6(D);
_5 = ~_4;
MEM[(char *)buf_7(D) + 3B] = _5;
If it was instead:
_1 = ~data_6(D);
_2 = _1 >> 8;
_3 = (char) _2;
MEM[(char *)buf_7(D) + 2B] = _3;
_4 = (char) _1;
MEM[(char *)buf_7(D) + 3B] = _4;
then it would handle that. So I think it is a missed optimization in FRE or
whatever else does SCCVN, or something match.pd should handle.
As for:
> void baz (char *buf, unsigned int data)
> {
> buf[0] = data >> 8;
> buf[1] = data;
> }
not using movbew, that is something that should be done in the backend.
For the middle-end, we don't have bswap16 and consider {L,R}ROTATE_EXPR by 8
as the canonical 16-bit byte swap. Please also have a look:
unsigned short
baz (unsigned short *buf)
{
unsigned short a = buf[0];
return ((unsigned short) (a >> 8)) | (unsigned short) (a << 8);
}
where we could also emit movbew instead of movw + rolw (if it is actually a
win). Thus, I think i386.md should provide patterns for combine (or peephole2
if the former doesn't work for some reason) for this.
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--- Comment #1 from Yibiao Yang <yangyibiao at nju dot edu.cn> ---
Note that this issue was found by Yibiao Yang and shqking.
>From gcc-bugs-return-582302-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 11:31:35 2017
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From: "arnd at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/82963] -Waddress too trigger happy
Date: Mon, 20 Nov 2017 11:31:00 -0000
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Arnd Bergmann <arnd at linaro dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #5 from Arnd Bergmann <arnd at linaro dot org> ---
The change in gcc-7 was done in r235878 to address pr48778. From reading that
pr, it sounds to me that both warnings should fall into the same category, it's
just that this one is not as common, so nobody has complained before.
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From: "yangyibiao at nju dot edu.cn" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83067] New: wrong code on arm-linux-gnueabi
Date: Mon, 20 Nov 2017 11:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83067
Bug ID: 83067
Summary: wrong code on arm-linux-gnueabi
Product: gcc
Version: 5.4.0
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$ arm-linux-gnueabi-gcc --version
arm-linux-gnueabi-gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ gcc --version
gcc --version
gcc (Ubuntu 5.4.1-2ubuntu1~16.04) 5.4.1 20160904
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ cat small.c
#define f(g) ({ unsigned long long u = (g); -((unsigned long long)(u));})
void main()
{
printf("%d\n", f(65527));
}
$ arm-linux-gnueabi-gcc -static small.c; ./a.out
-150998972
$ gcc small.c; ./a.out
-65527
>From gcc-bugs-return-582304-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 11:34:39 2017
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Subject: [Bug target/83067] wrong code on arm-linux-gnueabi
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--- Comment #2 from Yibiao Yang <yangyibiao at nju dot edu.cn> ---
$ arm-linux-gnueabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc-cross/arm-linux-gnueabi/5/lto-wrapper
Target: arm-linux-gnueabi
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
5.4.0-6ubuntu1~16.04.4' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm
--disable-libquadmath --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-armel-cross/jre
--enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-armel-cross
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-armel-cross
--with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--disable-libgcj --enable-objc-gc --enable-multiarch --enable-multilib
--disable-sjlj-exceptions --with-arch=armv5t --with-float=soft --disable-werror
--enable-multilib --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=arm-linux-gnueabi
--program-prefix=arm-linux-gnueabi- --includedir=/usr/arm-linux-gnueabi/include
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4)
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
5.4.1-2ubuntu1~16.04' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.4.1 20160904 (Ubuntu 5.4.1-2ubuntu1~16.04)
>From gcc-bugs-return-582305-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 11:51:56 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Mon, 20 Nov 2017 11:51:00 -0000
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--- Comment #20 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 20 Nov 2017, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78821
>
> --- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> (In reply to Uroš Bizjak from comment #17)
> > Hm, even with the latest patch, the testcase from comment #5:
> > still compiles to:
> >
> > movl %esi, %eax
> > movw %si, (%rdi)
> > notl %esi
> > notl %eax
> > movb %sil, 3(%rdi)
> > movb %ah, 2(%rdi)
> > ret
>
> The reason for that is that the IL is something the bswap framework can't
> handle. Let's look just at the simplified:
> void baz (char *buf, unsigned int data)
> {
> buf[2] = ~data >> 8;
> buf[3] = ~data;
> }
>
> _1 = ~data_6(D);
> _2 = _1 >> 8;
> _3 = (char) _2;
> MEM[(char *)buf_7(D) + 2B] = _3;
> _4 = (char) data_6(D);
> _5 = ~_4;
> MEM[(char *)buf_7(D) + 3B] = _5;
>
> If it was instead:
> _1 = ~data_6(D);
> _2 = _1 >> 8;
> _3 = (char) _2;
> MEM[(char *)buf_7(D) + 2B] = _3;
> _4 = (char) _1;
> MEM[(char *)buf_7(D) + 3B] = _4;
> then it would handle that. So I think it is a missed optimization in FRE or
> whatever else does SCCVN, or something match.pd should handle.
Index: gcc/tree-ssa-sccvn.c
===================================================================
--- gcc/tree-ssa-sccvn.c (revision 254945)
+++ gcc/tree-ssa-sccvn.c (working copy)
@@ -3632,6 +3632,38 @@ visit_nary_op (tree lhs, gassign *stmt)
}
}
}
+ case BIT_NOT_EXPR:
+ {
+ if (TREE_CODE (rhs1) == SSA_NAME)
+ {
+ gassign *def = dyn_cast <gassign *> (SSA_NAME_DEF_STMT
(rhs1));
+ if (def
+ && CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (def)))
+ {
+ tree ops[3] = {};
+ tree rhs11 = gimple_assign_rhs1 (def);
+ if (TYPE_PRECISION (TREE_TYPE (rhs11))
+ >= TYPE_PRECISION (TREE_TYPE (rhs1)))
+ {
+ ops[0] = rhs11;
+ tree tem = vn_nary_op_lookup_pieces (1, BIT_NOT_EXPR,
+ TREE_TYPE
(rhs11),
+ ops, NULL);
+ if (tem)
+ {
+ ops[0] = tem;
+ result = vn_nary_build_or_lookup (NOP_EXPR, type,
ops);
+ if (result)
+ {
+ bool changed = set_ssa_val_to (lhs, result);
+ vn_nary_op_insert_stmt (stmt, result);
+ return changed;
+ }
+ }
+ }
+ }
+ }
+ }
default:;
}
> As for:
> > void baz (char *buf, unsigned int data)
> > {
> > buf[0] = data >> 8;
> > buf[1] = data;
> > }
> not using movbew, that is something that should be done in the backend.
> For the middle-end, we don't have bswap16 and consider {L,R}ROTATE_EXPR by 8
> as the canonical 16-bit byte swap. Please also have a look:
> unsigned short
> baz (unsigned short *buf)
> {
> unsigned short a = buf[0];
> return ((unsigned short) (a >> 8)) | (unsigned short) (a << 8);
> }
> where we could also emit movbew instead of movw + rolw (if it is actually a
> win). Thus, I think i386.md should provide patterns for combine (or peephole2
> if the former doesn't work for some reason) for this.
>
>
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/83066] [8 regression] 26_numerics/gcd/gcd_neg.cc fails since r254736
Date: Mon, 20 Nov 2017 12:01:00 -0000
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Ville Voutilainen <ville.voutilainen at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |ville.voutilainen at gmail dot com
Resolution|--- |FIXED
--- Comment #1 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Fixed in r254785.
>From gcc-bugs-return-582307-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 12:02:22 2017
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Subject: [Bug rtl-optimization/83068] New: Suboptimal code generated with -m32 using MMX reg
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Bug ID: 83068
Summary: Suboptimal code generated with -m32 using MMX reg
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: bradfier at fstab dot me
Target Milestone: ---
Follow up from ML post here: [1]
I tried compiling the following simple function with different -march flags in
-m32 mode:
> uint64_t sum(uint64_t a, uint64_t b) {
> return a + b;
> }
Using g++ -m32 -O2 the generated ASM is the following:
> # 64-m32-example.cpp:6: return a + b;
> mov eax, DWORD PTR [esp+12] # b, b
> add eax, DWORD PTR [esp+4] # tmp90, a
> mov edx, DWORD PTR [esp+16] # b, b
> adc edx, DWORD PTR [esp+8] #, a
> # 64-m32-example.cpp:7: }
> ret
However when I compile with -m32 -O2 -march=broadwell (or native, my
processor is a Skylake part) I get the following code instead:
> vmovq xmm1, QWORD PTR [esp+12] # b, b
> # 64-m32-example.cpp:6: return a + b;
> vmovq xmm0, QWORD PTR [esp+4] # tmp92, a
> vpaddq xmm0, xmm0, xmm1 # tmp90, tmp92, b
> vmovd eax, xmm0 # tmp93, tmp90
> vpextrd edx, xmm0, 1 # tmp94, tmp90,
> # 64-m32-example.cpp:7: }
> ret
This seems to be generated for any processor type where MMX is available,
although I have not tested exhaustively.
I thought this looked suspect, so I ran a benchmark using Hayai.
For the code using regular mov and add instructions, a 'run' is 10,000
iterations:
----------
Run Times: (1 run = 10,000 iterations)
Average time: 0.006 us (~0.095 us)
Fastest time: 0.000 us (-0.006 us / -100.000 %)
Slowest time: 3.958 us (+3.952 us / +68209.689 %)
Median time: 0.000 us (1st quartile: 0.000 us | 3rd quartile: 0.000 us)
Average performance: 172586379.48293 runs/s
Best performance: inf runs/s (+inf runs/s / +inf %)
Worst performance: 252652.85498 runs/s (-172333726.62795 runs/s / -99.85361
%)
Median performance: inf runs/s (1st quartile: inf | 3rd quartile: inf)
----------
I do wonder if these numbers are suspect, they seem too fast even for a simple
function,
but I don't know enough about the Intel OOE to be sure what's going on.
What's clear is the code using MMX and vector instructions is much slower:
----------
Run Times: (1 run = 10,000 iterations)
Average time: 24.901 us (~1.144 us)
Fastest time: 23.867 us (-1.034 us / -4.153 %)
Slowest time: 61.867 us (+36.966 us / +148.451 %)
Median time: 24.867 us (1st quartile: 24.867 us | 3rd quartile: 24.867 us)
Average performance: 40158.86848 runs/s
Best performance: 41898.85616 runs/s (+1739.98768 runs/s / +4.33276 %)
Worst performance: 16163.70601 runs/s (-23995.16247 runs/s / -59.75059 %)
Median performance: 40213.93815 runs/s (1st quartile: 40213.93815 | 3rd
quartile: 40213.93815)
----------
If this is a genuine regression I can look into where it's coming from,
I have my eye on dimode_scalar_chain::compute_convert_gain, but I'll keep
digging for now.
Thanks,
Richard
[1]: https://gcc.gnu.org/ml/gcc/2017-11/msg00128.html
>From gcc-bugs-return-582308-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 12:05:31 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/83068] Suboptimal code generated with -m32 using MMX reg
Date: Mon, 20 Nov 2017 12:05:00 -0000
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--- Comment #1 from Richard Bradfield <bradfier at fstab dot me> ---
And as usual I forget to mention these things:
I am compiling everything using gcc trunk, at commit r254929 from Sun Nov 19
This behaviour is not present in GCC 7.2
>From gcc-bugs-return-582309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 12:10:58 2017
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83046] ICE in nvptx offloading, C++ compilation of libgomp.oacc-c-c++-common/gang-static-2.c
Date: Mon, 20 Nov 2017 12:10:00 -0000
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--- Comment #4 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #3)
> (In reply to Thomas Schwinge from comment #0)
> > ... starting with r254437 "Instrument function exit with
> > __builtin_unreachable in C++".
> > Obviously, that test case has a "-Wreturn-type mismatch" (which is not
> > diagnosed for C++; see reduced PR83045), and fixing that cures this nvptx
> > offloading ICE.
>
> Can you please provide steps to reproduce this?
You'll either have to build an offloading compiler, but -- much simpler! -- I
assume it will be sufficient to resolve the issue seen in the
"-foffload=disable" case:
Configure GCC as usual, but add "--enable-offload-targets=nvptx-none=/no/where"
(to generally enable offloading, but without providing an actual nvptx
offloading compiler), build, and then run:
$ make check-target-libgomp
RUNTESTFLAGS='--target_board=unix\{-foffload=disable\}
{c,c++}.exp=gang-static-2.c'
[...]
Running target unix/-foffload=disable
Using /usr/share/dejagnu/baseboards/unix.exp as board description file for
target.
Using /usr/share/dejagnu/config/unix.exp as generic interface file for
target.
Using ../../../../source-gcc/libgomp/testsuite/config/default.exp as
tool-and-target-specific interface file.
Running ../../../../source-gcc/libgomp/testsuite/libgomp.c/c.exp ...
Running ../../../../source-gcc/libgomp/testsuite/libgomp.c++/c++.exp ...
Running ../../../../source-gcc/libgomp/testsuite/libgomp.hsa.c/c.exp ...
Running ../../../../source-gcc/libgomp/testsuite/libgomp.oacc-c/c.exp ...
FAIL: libgomp.oacc-c/../libgomp.oacc-c-c++-common/gang-static-2.c
-DACC_DEVICE_TYPE_nvidia=1 -DACC_MEM_SHARED=0 -O2 execution test
Running ../../../../source-gcc/libgomp/testsuite/libgomp.oacc-c++/c++.exp
...
FAIL: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/gang-static-2.c
-DACC_DEVICE_TYPE_nvidia=1 -DACC_MEM_SHARED=0 -O2 (test for excess errors)
=== libgomp Summary ===
# of expected passes 1
# of unexpected failures 2
# of unresolved testcases 1
# of unsupported tests 4
[...]
Compilation should either succeed (as it still does for C, and did before for
C++), or terminate with a suitable diagnostic (the issue discussed in PR83045
"-Wreturn-type regression in C++").
For "c.exp" the "execution test" FAILs: "libgomp: target function wasn't
mapped" (expected in this special configuration), but for c++.exp you'll see
compilation FAIL with "excess errors":
/tmp/ccBzwk9H.o:(.gnu.offload_funcs+0x0): undefined reference to
`main._omp_fn.7'
/tmp/ccBzwk9H.o:(.gnu.offload_funcs+0x8): undefined reference to
`main._omp_fn.6'
/tmp/ccBzwk9H.o:(.gnu.offload_funcs+0x10): undefined reference to
`main._omp_fn.5'
/tmp/ccBzwk9H.o:(.gnu.offload_funcs+0x18): undefined reference to
`main._omp_fn.4'
/tmp/ccBzwk9H.o:(.gnu.offload_funcs+0x20): undefined reference to
`main._omp_fn.3'
/tmp/ccBzwk9H.o:(.gnu.offload_funcs+0x28): undefined reference to
`main._omp_fn.2'
/tmp/ccBzwk9H.o:(.gnu.offload_funcs+0x30): undefined reference to
`main._omp_fn.1'
collect2: error: ld returned 1 exit status
compiler exited with status 1
(I'll probably not be able to look into that myself in the next few weeks.)
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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--- Comment #21 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42660
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42660&action=edit
gcc8-pr78821-i386.patch
Untested patch for the -mmovbe movbew loads/stores. Note, is there any
particular reason why we don't use for AT&T syntax w/l/q suffixes for movbe?
At least looking at binutils testsuite, it covers both movbe without suffix and
movbe[wlq]. On the other side, for bswap insn there are no suffixes.
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Subject: [Bug c++/26748] gimplify_expr_stmt in cp-gimplifer.c does warnings
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #4)
> (In reply to Andrew Pinski from comment #0)
> > I don't have a testcase but gimplify_expr_stmt produces warnings:
> > warning (OPT_Wextra, "statement with no effect");
> > ...
> > else if (warn_unused_value)
> > warn_if_unused_value (stmt, input_location);
>
> WAITING on a testcase
Closing since there's been no response with a testcase so I can't reproduce the
bug.
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Subject: [Bug middle-end/24222] [meta-bug] The gimplifier shouldn't emit warnings or errors
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Bug 24222 depends on bug 26748, which changed state.
Bug 26748 Summary: gimplify_expr_stmt in cp-gimplifer.c does warnings
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26748
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #4)
> (In reply to Paolo Carlini from comment #3)
> > Patches go to gcc-patches...
>
> WAITING until patch is submitted
Patch was never submitted, so I'm going to assume no one cares about this and
close it.
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--- Comment #7 from itsimbal at gcc dot gnu.org ---
Author: itsimbal
Date: Mon Nov 20 12:30:25 2017
New Revision: 254951
URL: https://gcc.gnu.org/viewcvs?rev=254951&root=gcc&view=rev
Log:
PR bootstrap/83015
* config/cr16/unwind-cr16.c (uw_install_context): Add FRAMES
parameter.
* config/xtensa/unwind-dw2-xtensa.c: Likewise
* config/ia64/unwind-ia64.c: Add frames parameter.
* unwind-sjlj.c: Likewise.
Modified:
trunk/libgcc/ChangeLog
trunk/libgcc/config/cr16/unwind-cr16.c
trunk/libgcc/config/ia64/unwind-ia64.c
trunk/libgcc/config/xtensa/unwind-dw2-xtensa.c
trunk/libgcc/unwind-sjlj.c
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Subject: [Bug c++/50445] Rejects use of constant expression using a pointer non-type template parameter
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |diagnostic
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #1)
> The error message is now:
>
> $ /usr/local/bin/g++ -c -Wall -Wextra -pedantic 50445.cc
> 50445.cc: In instantiation of ‘const int X<(& values)>::val0’:
> 50445.cc:7:22: required from here
> 50445.cc:4:19: error: the value of ‘values’ is not usable in a constant
> expression
> static int const val0 = values[0];
> ^~~~
> 50445.cc:1:18: note: ‘values’ was not declared ‘constexpr’
> extern int const values[] = { 1, 2, 3 };
> ^~~~~~
> 50445.cc:7:26: error: size of array ‘array’ is not an integral
> constant-expression
> int array[X<values>::val0];
> ^
> $
>
> ...which I think clears things up. Although maybe the note saying 'values'
> was not declared 'constexpr' could have a fix-it hint added to it showing
> where to insert the 'constexpr'? Putting in WAITING to see what the reporter
> thinks.
No reply so I'm going to assume the new message is enough of an improvement.
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Subject: [Bug c++/82781] [6/7/8 Regression] Vector extension operators return wrong result in constexpr
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Nov 20 12:57:50 2017
New Revision: 254952
URL: https://gcc.gnu.org/viewcvs?rev=254952&root=gcc&view=rev
Log:
PR c++/82781
* constexpr.c (cxx_eval_vector_conditional_expression): New function.
(cxx_eval_constant_expression) <case VEC_COND_EXPR>: Use it instead
of cxx_eval_conditional_expression.
* g++.dg/ext/constexpr-pr82781.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/ext/constexpr-pr82781.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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--- Comment #22 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #21)
> Created attachment 42660 [details]
> gcc8-pr78821-i386.patch
>
> Untested patch for the -mmovbe movbew loads/stores. Note, is there any
> particular reason why we don't use for AT&T syntax w/l/q suffixes for movbe?
> At least looking at binutils testsuite, it covers both movbe without suffix
> and movbe[wlq]. On the other side, for bswap insn there are no suffixes.
No particular reason - we should add suffixes.
OTOH, proposed patch should use enabled attribute to enable xchg, and split the
pattern after reload to lose FLAGS_REG clobber for xchg and movbe
aliternatives.
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Subject: [Bug c++/83049] Allow overloading of ?: conditional operator
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
In general GCC tries to avoid adding language extensions until they have at
least been proposed for addition to the standard, not the other way around.
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Subject: [Bug c++/83050] Please provide shortcircuit attribute for || and && operators
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Mon, 20 Nov 2017 13:23:00 -0000
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--- Comment #23 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #22)
> (In reply to Jakub Jelinek from comment #21)
> > Created attachment 42660 [details]
> > gcc8-pr78821-i386.patch
> >
> > Untested patch for the -mmovbe movbew loads/stores. Note, is there any
> > particular reason why we don't use for AT&T syntax w/l/q suffixes for movbe?
> > At least looking at binutils testsuite, it covers both movbe without suffix
> > and movbe[wlq]. On the other side, for bswap insn there are no suffixes.
>
> No particular reason - we should add suffixes.
Ok, will add them incrementally.
> OTOH, proposed patch should use enabled attribute to enable xchg, and split
> the pattern after reload to lose FLAGS_REG clobber for xchg and movbe
> aliternatives.
I believe enabled attribute can't depend on
optimize_function_for_size_p (cfun).
Splitting after reload is something I can certainly do.
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--- Comment #24 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 42661
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42661&action=edit
Add bswaphi2 pattern
What do you think about going through bswaphi2 pattern, as in the attached
patch. Using of xcgh in place of bswap is suggested by Intel, but we can still
transform it to rotate in peephole2 pass.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82951
--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
Author: glisse
Date: Mon Nov 20 13:26:39 2017
New Revision: 254954
URL: https://gcc.gnu.org/viewcvs?rev=254954&root=gcc&view=rev
Log:
VRP: x+1 and -x cannot be INT_MIN
2017-11-20 Marc Glisse <marc.glisse@inria.fr>
gcc/
* vr-values.c (extract_range_from_binary_expr): Use a full range
for VR_VARYING.
gcc/testsuite/
PR testsuite/82951
* gcc.c-torture/execute/20040409-1.c: Move invalid tests...
* gcc.c-torture/execute/20040409-1w.c: ... here with -fwrapv.
* gcc.c-torture/execute/20040409-2.c: Move invalid tests...
* gcc.c-torture/execute/20040409-2w.c: ... here with -fwrapv.
* gcc.c-torture/execute/20040409-3.c: Move invalid tests...
* gcc.c-torture/execute/20040409-3w.c: ... here with -fwrapv.
* gcc.dg/tree-ssa/cmpmul-1.c: Tweak condition.
* gcc.dg/tree-ssa/vrp118.c: New file.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/20040409-1w.c
trunk/gcc/testsuite/gcc.c-torture/execute/20040409-2w.c
trunk/gcc/testsuite/gcc.c-torture/execute/20040409-3w.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp118.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.c-torture/execute/20040409-1.c
trunk/gcc/testsuite/gcc.c-torture/execute/20040409-2.c
trunk/gcc/testsuite/gcc.c-torture/execute/20040409-3.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/cmpmul-1.c
trunk/gcc/vr-values.c
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Subject: [Bug middle-end/83069] New: [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
Date: Mon, 20 Nov 2017 13:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83069
Bug ID: 83069
Summary: [8 Regression] internal compiler error: in
from_gcov_type, at profile-count.h:676
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
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CC: hubicka at gcc dot gnu.org
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On x86-64, r254929 failed to build 416.gamess in SPEC CPU 2006:
gfortran -c -o chgpen.fppized.o -O3 -funroll-loops -ffast-math -ffixed-form
-std=legacy chgpen.fppized.f
during IPA pass: inline
chgpen.fppized.f:847:0:
SUBROUTINE CGPQUA(POT,CCX,CCY,CCZ,KOUNT,DAO,L2,G)
internal compiler error: in from_gcov_type, at profile-count.h:676
0x689f92 estimate_bb_frequencies(bool)
../../src-trunk/gcc/profile-count.h:676
0xd0e3bf rebuild_frequencies()
../../src-trunk/gcc/predict.c:3911
0xcf33f4 execute_function_todo
../../src-trunk/gcc/passes.c:1975
0xcf3d7e execute_todo
../../src-trunk/gcc/passes.c:2048
0x686d97 execute_one_ipa_transform_pass
../../src-trunk/gcc/passes.c:2245
0x686d97 execute_all_ipa_transforms()
../../src-trunk/gcc/passes.c:2281
0xa3b55a cgraph_node::expand()
../../src-trunk/gcc/cgraphunit.c:2132
0xa3c77b expand_all_functions
../../src-trunk/gcc/cgraphunit.c:2275
0xa3c77b symbol_table::compile()
../../src-trunk/gcc/cgraphunit.c:2623
0xa3ea59 symbol_table::compile()
../../src-trunk/gcc/cgraphunit.c:2537
0xa3ea59 symbol_table::finalize_compilation_unit()
../../src-trunk/gcc/cgraphunit.c:2716
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-582325-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 13:35:16 2017
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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--- Comment #25 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #23)
> I believe enabled attribute can't depend on
> optimize_function_for_size_p (cfun).
Indeed. Maybe preferred_for_size can come handy here (and in bswaphi_lowpart
that obviously predates introduction of this tune flag).
>From gcc-bugs-return-582324-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 13:35:08 2017
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Subject: [Bug libfortran/83070] New: -Wsign-compare warning in eoshift0
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Bug ID: 83070
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../../../trunk-git/libgfortran/intrinsics/eoshift0.c: In function ‘eoshift0’:
../../../trunk-git/libgfortran/intrinsics/eoshift0.c:119:11: warning:
comparison of integer expressions of different signedness: ‘index_type {aka
long int}’ and ‘size_t {aka long unsigned int}’ [-Wsign-compare]
if (rs != r_ex)
^~
../../../trunk-git/libgfortran/intrinsics/eoshift0.c:125:11: warning:
comparison of integer expressions of different signedness: ‘index_type {aka
long int}’ and ‘size_t {aka long unsigned int}’ [-Wsign-compare]
if (as != a_ex)
^~
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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--- Comment #26 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Comment on attachment 42661
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42661
Add bswaphi2 pattern
[(set (match_operand:HI 0 "register_operand")
Is that so that you don't have to bother with forcing operands[1] into a reg if
operands[0] is a MEM and not equal to operands[1]?
The disadvantage of your approach is that the RA will have fewer possibilities
(for -m32 not being able to use %si/%di/%bp, and for all arches not being able
to do 16-bit bswap on memory directly (rolw $8, mem). Guess the latter could
be fixed by another peephole2, the former can't.
On the other side, it has the advantage that flags aren't clobbered from the
beginning, so perhaps sched1 or similar can do a better job.
>From gcc-bugs-return-582327-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 13:39:06 2017
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Subject: [Bug testsuite/82951] gcc.c-torture/execute/20040409-1.c undefined behavior
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #5 from Marc Glisse <glisse at gcc dot gnu.org> ---
.
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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--- Comment #27 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #26)
> Comment on attachment 42661 [details]
> Add bswaphi2 pattern
>
> [(set (match_operand:HI 0 "register_operand")
>
> Is that so that you don't have to bother with forcing operands[1] into a reg
> if operands[0] is a MEM and not equal to operands[1]?
Yes ;) Just a little shortcut - combine can fix this without problems nowadays.
> The disadvantage of your approach is that the RA will have fewer
> possibilities (for -m32 not being able to use %si/%di/%bp, and for all
> arches not being able to do 16-bit bswap on memory directly (rolw $8, mem).
> Guess the latter could be fixed by another peephole2, the former can't.
I don't think mem/mem case is interesting, also IIRC, RA starts register
allocation with regclass that has lowest number of registers to avoid spilling
failures.
> On the other side, it has the advantage that flags aren't clobbered from the
> beginning, so perhaps sched1 or similar can do a better job.
Yes, the above reason was my motivation for the proposed patch.
>From gcc-bugs-return-582329-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 13:48:52 2017
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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--- Comment #28 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ok, let's go with your patch then.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83051] [8 Regression] ICE on valid code at -O3: in edge_badness, at ipa-inline.c:1024
Date: Mon, 20 Nov 2017 13:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83051
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-20
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
This will be some round off as values are:
edge_time: 1115091708.000000
callee_info->time: 1115091707.000000
>From gcc-bugs-return-582331-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 13:52:01 2017
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From: "pmatos at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/83071] New: gccgo: ICE in set_type
Date: Mon, 20 Nov 2017 13:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83071
Bug ID: 83071
Summary: gccgo: ICE in set_type
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: go
Assignee: ian at airs dot com
Reporter: pmatos at gcc dot gnu.org
CC: cmang at google dot com
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I have written a very simple program in Go and somehow I surprisingly managed
to crash the compiler.
This is my first Go program so maybe I am playing outside the normal rules...
still, it shouldn't ICE.
asmparser.go:
----------------
package asmparser
import "container/list"
// Structure representing assembler files
// An AsmFile is a list of assembler specific keywords and labels interspersed
with
// architectural specific instructions.
type AsmFile list.List
// Interface for entrie
type AsmEntry struct {
lineno int
entry *Entry
}
type Entry interface {
isInsn() bool
isKeyword() bool
isLabel() bool
}
type Insn struct {
mnemonic string
args list.List
}
func (insn Insn) isInsn() bool {
return true
}
func (insn Insn) isKeyword() bool {
return false
}
func (insn Insn) isLabel() bool {
return false
}
type Keyword struct {
name string
args string
}
func (kw Keyword) isInsn() bool {
return false
}
func (kw Keyword) isKeyword() bool {
return true
}
func (kw Keyword) isLabel() bool {
return false
}
type Label struct {
name string
}
func (l Label) isInsn() bool {
return false
}
func (l Label) isKeyword() bool {
return true
}
func (l Label) isLabel() bool {
return false
}
// Hand-written parser
func EatWhitespace(input string) (string, int) {
var eaten int = 0
for len(input) > 0 {
if input[0] != ' ' {
return input, eaten
}
input++
eaten++
}
return input, eaten
}
------------
$ go build
# gitlab.linki.tools/go-devtools/asmparser
go1: internal compiler error: in set_type, at
go/gofrontend/expressions.cc:16320
0x6013af Numeric_constant::set_type(Type*, bool, Location)
../../../gcc/gcc/go/gofrontend/expressions.cc:16320
0x8c06f9 Integer_expression::do_check_types(Gogo*)
../../../gcc/gcc/go/gofrontend/expressions.cc:2003
0x8dde63 Expression::check_types(Gogo*)
../../../gcc/gcc/go/gofrontend/expressions.h:902
0x8dde63 Check_types_traverse::expression(Expression**)
../../../gcc/gcc/go/gofrontend/gogo.cc:3297
0x8b190d Expression::traverse(Expression**, Traverse*)
../../../gcc/gcc/go/gofrontend/expressions.cc:45
0x8bb538 Expression_list::traverse(Traverse*)
../../../gcc/gcc/go/gofrontend/expressions.cc:15857
0x8e05b1 Block::traverse(Traverse*)
../../../gcc/gcc/go/gofrontend/gogo.cc:5977
0x8e05b1 Block::traverse(Traverse*)
../../../gcc/gcc/go/gofrontend/gogo.cc:5977
0x8e05b1 Block::traverse(Traverse*)
../../../gcc/gcc/go/gofrontend/gogo.cc:5977
0x8e05b1 Block::traverse(Traverse*)
../../../gcc/gcc/go/gofrontend/gogo.cc:5977
0x8e07c9 Function::traverse(Traverse*)
../../../gcc/gcc/go/gofrontend/gogo.cc:5101
0x8e3ebb Bindings::traverse(Traverse*, bool)
../../../gcc/gcc/go/gofrontend/gogo.cc:7803
0x8e41d1 Gogo::traverse(Traverse*)
../../../gcc/gcc/go/gofrontend/gogo.cc:2497
0x8e44e6 Gogo::check_types()
../../../gcc/gcc/go/gofrontend/gogo.cc:3307
0x8dd76f go_parse_input_files(char const**, unsigned int, bool, bool)
../../../gcc/gcc/go/gofrontend/go.cc:133
0x8d8bcf go_langhook_parse_file
../../../gcc/gcc/go/go-lang.c:323
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Fails wth both gccgo 7.2.1 (distributed with Fedora) and
$ go version
go version go1.9 gccgo (GCC) 8.0.0 20171120 (experimental) linux/amd64
which I just built locally.
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/83048] wrap multi-statement macros in do {} while (0)
Date: Mon, 20 Nov 2017 13:52:00 -0000
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--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
I wonder if we could use a macro like this:
...
#define SAFE_MACRO_STMT(stmt) \
do { \
if (1) \
stmt; \
else \
{} \
if (0) \
stmt; \
} while (0)
#if ERROR == 0
// No warning or error
#define foo return
#elif ERROR == 1
// error: else without a previous if
#define foo return;
#elif ERROR == 2
// error: else without a previous if
#define foo return; return
#elif ERROR == 3
// warning: suggest explicit braces to avoid ambiguous else [-Wparentheses]
#define foo if (1) return; else return
#else
#error "Invalid value of ERROR"
#endif
void
bar (void)
{
SAFE_MACRO_STMT (foo);
}
...
If we wrap all target macro calls in SAFE_MACRO_STMT we trigger an error or a
warning if the target macro implementation is not equivalent to a single stmt.
>From gcc-bugs-return-582333-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 13:53:20 2017
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83072] New: Late VRP optimization
Date: Mon, 20 Nov 2017 13:53:00 -0000
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Bug ID: 83072
Summary: Late VRP optimization
Product: gcc
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Before r254954, cmpmul-1.c was optimized during EVRP:
int f(int a, int b, int c){
c |= 1;
a *= c;
b *= c;
return a == b;
}
After that revision, the range deduced for c|1 contains zero (we may want to
revisit that at some point, but that's a separate issue), so I changed the
testcase to
int f(int a, int b, int c){
if(c==0)__builtin_unreachable();
a *= c;
b *= c;
return a == b;
}
which is only optimized during forwprop3, after __builtin_unreachable() is
removed. Since EVRP knows how to perform this optimization, it may be worth
investigating why it fails to perform it in this case.
>From gcc-bugs-return-582334-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 13:56:56 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83007] [8 Regression] -Wstringop-overflow false positive
Date: Mon, 20 Nov 2017 13:56:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Thank you Martin for the explanation, I'll fix the code.
>From gcc-bugs-return-582335-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 14:00:55 2017
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Mon, 20 Nov 2017 14:00:00 -0000
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--- Comment #29 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #24)
> Using of xcgh in place of bswap is suggested by Intel ...
For reference:
http://www.felixcloutier.com/x86/BSWAP.html
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Subject: [Bug target/83067] wrong code on arm-linux-gnueabi
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |ktkachov at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #3 from ktkachov at gcc dot gnu.org ---
The correct format specifier to print an unsigned long long is "%llu", not
"%d".
If you want to print the signed variant (i.e. -65527) you should use "%lld"
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Subject: [Bug c++/83046] ICE in nvptx offloading, C++ compilation of libgomp.oacc-c-c++-common/gang-static-2.c
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Thanks for instructions, but apparently does not work for me:
make check-target-libgomp
RUNTESTFLAGS='--target_board=unix\{-foffload=disable\}
{c,c++}.exp=gang-static-2.c'
make[1]: Entering directory
'/home/marxin/Programming/gcc/objdir2/x86_64-pc-linux-gnu/libgomp'
Making check in testsuite
make[2]: Entering directory
'/home/marxin/Programming/gcc/objdir2/x86_64-pc-linux-gnu/libgomp/testsuite'
make check-DEJAGNU
make[3]: Entering directory
'/home/marxin/Programming/gcc/objdir2/x86_64-pc-linux-gnu/libgomp/testsuite'
srcdir='../../../../libgomp/testsuite'; export srcdir; \
EXPECT=expect; export EXPECT; \
runtest=runtest; \
if /bin/sh -c "$runtest --version" > /dev/null 2>&1; then \
exit_status=0; l='libgomp'; for tool in $l; do \
if $runtest --tool $tool --srcdir $srcdir
--target_board=unix\{-foffload=disable\} {c,c++}.exp=gang-static-2.c; \
then :; else exit_status=1; fi; \
done; \
else echo "WARNING: could not find \`runtest'" 1>&2; :;\
fi; \
exit $exit_status
Test run by marxin on Mon Nov 20 15:03:00 2017
Native configuration is x86_64-pc-linux-gnu
=== libgomp tests ===
Schedule of variations:
unix/-foffload=disable
Running target unix/-foffload=disable
Using /usr/share/dejagnu/baseboards/unix.exp as board description file for
target.
Using /usr/share/dejagnu/config/unix.exp as generic interface file for target.
Using ../../../../libgomp/testsuite/config/default.exp as
tool-and-target-specific interface file.
Running ../../../../libgomp/testsuite/libgomp.c/c.exp ...
Running ../../../../libgomp/testsuite/libgomp.c++/c++.exp ...
Running ../../../../libgomp/testsuite/libgomp.hsa.c/c.exp ...
Running ../../../../libgomp/testsuite/libgomp.oacc-c/c.exp ...
Running ../../../../libgomp/testsuite/libgomp.oacc-c++/c++.exp ...
=== libgomp Summary ===
# of untested testcases 2
# of unsupported tests 2
make[3]: Leaving directory
'/home/marxin/Programming/gcc/objdir2/x86_64-pc-linux-gnu/libgomp/testsuite'
make[2]: Leaving directory
'/home/marxin/Programming/gcc/objdir2/x86_64-pc-linux-gnu/libgomp/testsuite'
make[2]: Entering directory
'/home/marxin/Programming/gcc/objdir2/x86_64-pc-linux-gnu/libgomp'
true DO=all multi-do # make
:
:
:
make[2]: Leaving directory
'/home/marxin/Programming/gcc/objdir2/x86_64-pc-linux-gnu/libgomp'
make[1]: Leaving directory
'/home/marxin/Programming/gcc/objdir2/x86_64-pc-linux-gnu/libgomp'
$ ./gcc/xgcc -v
Using built-in specs.
COLLECT_GCC=./gcc/xgcc
OFFLOAD_TARGET_NAMES=nvptx-none
Target: x86_64-pc-linux-gnu
Configured with: ../configure --enable-languages=c,c++,fortran
--disable-multilib --prefix=/home/marxin/bin/gcc --disable-bootstrap
--enable-offload-targets=nvptx-none=/no/where
Thread model: posix
gcc version 8.0.0 20171120 (experimental) (GCC)
>From gcc-bugs-return-582338-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 14:09:22 2017
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Subject: [Bug target/82960] spu_machine_dependent_reorg does not handle jump_table_data insn
Date: Mon, 20 Nov 2017 14:09:00 -0000
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--- Comment #3 from Ulrich Weigand <uweigand at gcc dot gnu.org> ---
I'll have a look. I still need to get my SPU build environment back up and
running, the build currently fails due to unrelated issues.
I remember looking at this a few years back:
https://gcc.gnu.org/ml/gcc-patches/2013-04/msg00151.html
This seemed to have fixed the problem back then, not sure why this no longer
works.
>From gcc-bugs-return-582339-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 14:16:16 2017
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Subject: [Bug c++/83060] ICE on valid C++ code: in ignore_overflows, at cp/cvt.c:583
Date: Mon, 20 Nov 2017 14:16:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org,
| |jsm28 at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Surely related to that.
The question is what to do. E.g.
struct A { int i; int s[8]; } a;
int *p = &a.s[-1];
int *q = &a.s[__PTRDIFF_MAX__];
is accepted even with -pedantic-errors without any warnings, only if p/q are
constexpr there are errors.
So, shall we handle offsetof like the above without constexpr and not complain
at all (and thus drop the overflow bits somewhere silently)?
Another thing is that fold_offsetof_1 is I bet called with unfolded trees, so
just doing offsetof (A, s[0 - 1]) or offsetof (A, s[__PTRDIFF_MAX__]) could
bypass the -Warray-bounds stuff in that function. Shall it c_fully_fold the
array index, or shall we just build OFFSETOF_EXPR always and handle it during
folding (guess that might be GCC9 material)?
For negative values, I wonder if we just shouldn't move the
t = convert (sizetype, t);
before the
/* Check if the offset goes beyond the upper bound of the array. */
if (TREE_CODE (t) == INTEGER_CST && tree_int_cst_sgn (t) >= 0)
(and then we wouldn't need to even do the && tree_int_cst_sgn (t) >= 0 part),
so that negative references are considered like very large positive ones; or if
there should be a special warning.
In any case, at least for __PTRDIFF_MAX__ the overflow is introduced during the
MULT_EXPR folding.
>From gcc-bugs-return-582340-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 14:29:07 2017
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Subject: [Bug gcov-profile/83030] [8 regression] ICE in create_pseudo_cfg, at dwarf2cfi.c:2840
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Thanks for the report. Unfortunately one needs native compiler for that. Do we
have a working machine in GCC Compile Farm?
Can you please bisect to a single revision?
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Subject: [Bug target/82960] spu_machine_dependent_reorg does not handle jump_table_data insn
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--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Ulrich Weigand from comment #3)
> I'll have a look.
Thanks :)
> I still need to get my SPU build environment back up and
> running, the build currently fails due to unrelated issues.
>
> I remember looking at this a few years back:
> https://gcc.gnu.org/ml/gcc-patches/2013-04/msg00151.html
>
> This seemed to have fixed the problem back then, not sure why this no longer
> works.
My guess would be that this problem in pad_bb was already present, but did not
show up when building without -fenable-checking=rtl.
>From gcc-bugs-return-582342-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 14:31:26 2017
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Subject: [Bug c++/83060] ICE on valid C++ code: in ignore_overflows, at cp/cvt.c:583
Date: Mon, 20 Nov 2017 14:31:00 -0000
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--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
I recall discussion years back that concluded the
int *p = &a.s[-1];
case was well formed (there being no access specifier between the two fields).
Of course the validity of the argument may have changed with updates to the
std.
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Subject: [Bug c++/83058] [6/7/8 Regression] ICE on C++ code with negative array index: in warn_placement_new_too_small, at cp/init.c:2666
Date: Mon, 20 Nov 2017 14:32:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |msebor at gcc dot gnu.org
Target Milestone|8.0 |6.5
Summary|[8 Regression] ICE on C++ |[6/7/8 Regression] ICE on
|code with negative array |C++ code with negative
|index: in |array index: in
|warn_placement_new_too_smal |warn_placement_new_too_smal
|l, at cp/init.c:2666 |l, at cp/init.c:2666
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Not so recent regression, started with r229827.
There are multiple bugs in that code:
if (CONSTANT_CLASS_P (adj))
should really be a test for TREE_CODE (adj) == INTEGER_CST, tree_to_shwi is
going to ICE on anything else.
const_tree adj = TREE_OPERAND (oper, 1);
if (!use_obj_size && CONSTANT_CLASS_P (adj))
adjust += tree_to_shwi (adj);
similarly, plus there is no checking of addition overflows.
I think it might be better to turn adjust into an offset_int in which you
compute everything and then check if it can actually be used (or force
use_obj_size otherwise).
gcc_checking_assert (0 <= adjust);
this is where we ICE. The comparison operand order is incorrect too.
if (CONSTANT_CLASS_P (size))
Again, wrong check. Should be probably if (tree_fits_uhwi_p (size)).
bytes_need = tree_to_uhwi (size);
else if (nelts && CONSTANT_CLASS_P (nelts))
bytes_need = tree_to_uhwi (nelts)
* tree_to_uhwi (TYPE_SIZE_UNIT (type));
The above is also misformatted, should be
bytes_need = tree_to_uhwi (nelts)
* tree_to_uhwi (TYPE_SIZE_UNIT (type));
or
bytes_need = (tree_to_uhwi (nelts)
* tree_to_uhwi (TYPE_SIZE_UNIT (type)));
or
bytes_need
= tree_to_uhwi (nelts) * tree_to_uhwi (TYPE_SIZE_UNIT (type)));
What about the case when TYPE_SIZE_UNIT doesn't fit into uhwi? That will ICE
too.
else if (tree_fits_uhwi_p (TYPE_SIZE_UNIT (type)))
bytes_need = tree_to_uhwi (TYPE_SIZE_UNIT (type));
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Subject: [Bug middle-end/82878] [7/8 Regression] ICE in assign_temp, at function.c:968 when using optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82878
--- Comment #5 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Mon Nov 20 14:39:00 2017
New Revision: 254958
URL: https://gcc.gnu.org/viewcvs?rev=254958&root=gcc&view=rev
Log:
[PR c++/82878] pass-by-invisiref in lambda
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01115.html
PR c++/82878
PR c++/78495
* call.c (build_call_a): Don't set CALL_FROM_THUNK_P for inherited
ctor.
* cp-gimplify.c (cp_genericize_r): Restore THUNK dereference
inhibibition check removed in previous c++/78495 change.
PR c++/82878
* g++.dg/cpp0x/pr82878.C: New.
* g++.dg/cpp1z/inh-ctor38.C: Check moves too.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr82878.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/cp/lambda.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C
trunk/gcc/testsuite/g++.dg/cpp1z/inh-ctor38.C
>From gcc-bugs-return-582344-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 14:39:42 2017
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Subject: [Bug c++/78495] [7 regression][new inheriting ctors] invisible-ref parm has address taken
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78495
--- Comment #5 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Mon Nov 20 14:39:00 2017
New Revision: 254958
URL: https://gcc.gnu.org/viewcvs?rev=254958&root=gcc&view=rev
Log:
[PR c++/82878] pass-by-invisiref in lambda
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01115.html
PR c++/82878
PR c++/78495
* call.c (build_call_a): Don't set CALL_FROM_THUNK_P for inherited
ctor.
* cp-gimplify.c (cp_genericize_r): Restore THUNK dereference
inhibibition check removed in previous c++/78495 change.
PR c++/82878
* g++.dg/cpp0x/pr82878.C: New.
* g++.dg/cpp1z/inh-ctor38.C: Check moves too.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr82878.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/cp/lambda.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-switch.C
trunk/gcc/testsuite/g++.dg/cpp1z/inh-ctor38.C
>From gcc-bugs-return-582346-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 14:44:31 2017
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Subject: [Bug libstdc++/48101] obscure error message with std::set<const int>
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Which causes the code to be accepted. I'd rather do:
template<typename T> class allocator<const T>; // undefined
so there's an error.
>From gcc-bugs-return-582347-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 14:45:04 2017
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Subject: [Bug target/82615] [8 Regression] SPEC CPU2006 453.povray ~10% performance deviation with r248863
Date: Mon, 20 Nov 2017 14:45:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Yes, it fixed on Haswell, we're even slightly faster than before the
problematic revision. Tomorrow I'll measure Zen as well.
>From gcc-bugs-return-582348-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 14:54:18 2017
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Subject: [Bug ipa/80899] [6/7/8 Regression] Devirtualization causes incorrect code generation with placement new in some cases
Date: Mon, 20 Nov 2017 14:54:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|SUSPENDED |ASSIGNED
--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Looks like I set it to suspended instead of assigned and ignored ever since :(
>From gcc-bugs-return-582349-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 14:55:01 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/83030] [8 regression] ICE in create_pseudo_cfg, at dwarf2cfi.c:2840
Date: Mon, 20 Nov 2017 14:55:00 -0000
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--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
> Thanks for the report. Unfortunately one needs native compiler for that. Do we
> have a working machine in GCC Compile Farm?
Not yet: I do have Solaris 11/SPARC and x86 zones for external access
that are meant to be integrated into the compile farm if possible.
> Can you please bisect to a single revision?
Sure, will do.
Rainer
>From gcc-bugs-return-582351-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 14:58:25 2017
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Subject: [Bug target/82682] [8 Regression] FAIL: gcc.target/i386/pr50038.c scan-assembler-times movzbl 2 (found 3 times) since r253958
Date: Mon, 20 Nov 2017 14:58:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yes. r253955 to r253958 diff is:
--- pr50038.s.253955 2017-11-20 09:52:43.000000000 -0500
+++ pr50038.s.253958 2017-11-20 09:52:48.000000000 -0500
@@ -1,53 +1,55 @@
.file "pr50038.c"
.text
.p2align 4,,15
.globl test
.type test, @function
test:
.LFB0:
.cfi_startproc
pushl %edi
.cfi_def_cfa_offset 8
.cfi_offset 7, -8
pushl %esi
.cfi_def_cfa_offset 12
.cfi_offset 6, -12
pushl %ebx
.cfi_def_cfa_offset 16
.cfi_offset 3, -16
movl 16(%esp), %eax
movl 20(%esp), %edx
testl %eax, %eax
jle .L1
movl 24(%esp), %ecx
leal (%edx,%eax,2), %edi
.p2align 4,,10
.p2align 3
.L3:
movzbl (%edx), %esi
addl $2, %edx
addl $1, %ecx
movzbl -1(%edx), %eax
- imull $19595, %esi, %esi
+ movl %esi, %ebx
imull $38470, %eax, %eax
+ movzbl %bl, %esi
+ imull $19595, %esi, %esi
addl %esi, %eax
sarl $16, %eax
movb %al, -1(%ecx)
cmpl %edi, %edx
jne .L3
.L1:
popl %ebx
.cfi_restore 3
.cfi_def_cfa_offset 12
popl %esi
.cfi_restore 6
.cfi_def_cfa_offset 8
popl %edi
.cfi_restore 7
.cfi_def_cfa_offset 4
ret
.cfi_endproc
.LFE0:
.size test, .-test
.ident "GCC: (GNU) 8.0.0 20171020 (experimental)"
.section .note.GNU-stack,"",@progbits
Before *.ira dump the IL is identical, RA makes different decisions because
MEMs are seen as more costly than before.
@@ -237,7 +237,7 @@ Ranges after the compression:
Pressure: GENERAL_REGS=5
Hard reg set forest:
0:( 0-6 8-15)@0
- 1:( 0-6)@135464
+ 1:( 0-6)@167080
Allocno a0r99 of GENERAL_REGS(7) has 7 avail. regs 0-6, node: 0-6
(confl regs = 7-79)
Allocno a1r104 of GENERAL_REGS(7) has 7 avail. regs 0-6, node: 0-6
(confl regs = 7-79)
Allocno a2r103 of GENERAL_REGS(7) has 7 avail. regs 0-6, node: 0-6
(confl regs = 7-79)
@@ -266,9 +266,9 @@ Ranges after the compression:
Making a0(r99,l0) colorable
Making a1(r104,l0) colorable
Making a3(r96,l0) colorable
- Pushing a0(r99,l0)(cost 3058)
- Pushing a3(r96,l0)(cost 9008)
- Pushing a1(r104,l0)(cost 14358)
+ Pushing a0(r99,l0)(cost 3312)
+ Pushing a3(r96,l0)(cost 10962)
+ Pushing a1(r104,l0)(cost 16058)
Pushing a13(r107,l0)(cost 0)
Pushing a10(r108,l0)(cost 0)
Pushing a8(r111,l0)(cost 0)
@@ -284,15 +284,12 @@ Ranges after the compression:
Popping a11(r109,l0) -- assign reg 4
Popping a12(r93,l0) -- assign reg 4
Popping a2(r103,l0) -- assign reg 0
-Spilling a0r99 for a12r93
-Assigning 3 to a12r93
- a0(r99,l0) -- assign hard reg 5
Disposition:
- 12:r93 l0 3 3:r96 l0 2 0:r99 l0 5 2:r103 l0 0
+ 12:r93 l0 4 3:r96 l0 2 0:r99 l0 3 2:r103 l0 0
1:r104 l0 1 13:r107 l0 0 10:r108 l0 0 11:r109 l0 4
9:r110 l0 4 8:r111 l0 0 7:r112 l0 0
New iteration of spill/restore move
-+++Costs: overall 0, reg 0, mem 0, ld 0, st 0, move 0
++++Costs: overall 3400, reg 3400, mem 0, ld 0, st 0, move 0
+++ move loops 0, new jumps 0
>From gcc-bugs-return-582350-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 14:58:20 2017
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Subject: [Bug c++/83046] ICE in nvptx offloading, C++ compilation of libgomp.oacc-c-c++-common/gang-static-2.c
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--- Comment #6 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #5)
> Thanks for instructions, but apparently does not work for me:
>
> make check-target-libgomp
> === libgomp Summary ===
>
> # of untested testcases 2
Oh, sorry, that must be the tests being skipped when you don't have a Nvidia
GPU. Please remove the "dg-do run { target openacc_nvidia_accel_selected }"
directive from the test case file.
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Subject: [Bug tree-optimization/83072] Late VRP optimization
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-20
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look (after Jeff is finished moving stuff around).
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
STV pass "regression"
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-582355-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 15:07:56 2017
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Subject: [Bug target/82981] [7 Regression] unnecessary __multi3 call for mips64r6 linux kernel
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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CC| |clyon at gcc dot gnu.org
--- Comment #13 from Christophe Lyon <clyon at gcc dot gnu.org> ---
I have noticed that this patch (r254758) causes errors on several tests, for
instance:
c-c++-common/builtin-arith-overflow-2.c
target: arm-none-linux-gnueabi
--with-mode thumb
--with-cpu cortex-a9
and using -march=armv5t in the runtest flags/target board
spawn -ignore SIGHUP
/home/christophe.lyon/src/GCC/builds/gcc-fsf-reg-254758-thumb/obj-arm-none-linux-gnueabi/gcc3/gcc/xgcc
-B/home/christophe.lyon/src/GCC/builds/gcc-fsf-reg-254758-thumb/obj-arm-none-linux-gnueabi/gcc3/gcc/
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/testsuite/c-c++-common/builtin-arith-overflow-2.c
-march=armv5t -fno-diagnostics-show-caret -fdiagnostics-color=never
-Wc++-compat -Wno-long-long -lm -o ./builtin-arith-overflow-2.exe^M
during RTL pass: expand^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/testsuite/c-c++-common/builtin-arith-overflow-2.c:
In function 'main':^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/testsuite/c-c++-common/builtin-arith-overflow-2.c:93:23:
internal compiler error: Segmentation fault^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/testsuite/c-c++-common/builtin-arith-overflow-2.c:103:3:
note: in expansion of macro 'RuntimeAssert'^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/testsuite/c-c++-common/builtin-arith-overflow-2.c:250:3:
note: in expansion of macro 'G_TEST'^M
0xba522f crash_signal^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/toplev.c:325^M
0xb3cd90 commutative_operand_precedence(rtx_def*)^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/rtlanal.c:3405^M
0xb3cedd swap_commutative_operands_p(rtx_def*, rtx_def*)^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/rtlanal.c:3475^M
0x7baa10 do_compare_rtx_and_jump(rtx_def*, rtx_def*, rtx_code, int,
machine_mode, rtx_def*, rtx_code_label*, rtx_code_label*,
profile_probability)^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/dojump.c:996^M
0x9702c3 expand_mul_overflow^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/internal-fn.c:1841^M
0x970d1b expand_arith_overflow^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/internal-fn.c:2251^M
0x73749f expand_call_stmt^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/cfgexpand.c:2584^M
0x73749f expand_gimple_stmt_1^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/cfgexpand.c:3607^M
0x73749f expand_gimple_stmt^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/cfgexpand.c:3773^M
0x7393af expand_gimple_basic_block^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/cfgexpand.c:5774^M
0x73f1f6 execute^M
/home/christophe.lyon/src/GCC/sources/gcc-fsf/reg-254758/gcc/cfgexpand.c:6375^M
Please submit a full bug report,^M
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Subject: [Bug debug/82718] Bad DWARF5 .debug_loclists generation
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--- Comment #6 from Mark Wielaard <mark at gcc dot gnu.org> ---
Building elfutils with -g -O2 -gdwarf-5 still fails without this patch with
current gcc trunk (just in a different file libdwfl/realloc.c instead of
elf_begin.c as reported originally). Using the proposed patch
https://gcc.gnu.org/ml/gcc-patches/2017-10/msg01895.html makes it build fine.
BTW. Building with -gdwarf-5 didn't fail with GCC 7.2.
>From gcc-bugs-return-582357-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 15:18:14 2017
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Subject: [Bug tree-optimization/83073] New: Range for VR_VARYING | [1, 1]
Date: Mon, 20 Nov 2017 15:18:00 -0000
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Bug ID: 83073
Summary: Range for VR_VARYING | [1, 1]
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
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Target Milestone: ---
Before r254954, for x | 1 where x is VR_VARYING, we would deduce a
VR_ANTI_RANGE ~[0, 0]. Since then, we deduce [-INT_MAX, INT_MAX]. Both make
sense, but it is strange that we get something different for VR_VARYING and for
a full range, and Richard thinks it is worth looking into (maybe
zero_nonzero_bits_from_vr).
-O2 -fdump-tree-optimized-all
int f(int x){return x|1;}
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Subject: [Bug c/83056] GCC suggests the use of previously reported undeclared identifiers when reporting new undeclared identifiers
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-20
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--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Thanks for filing this.
Confirmed: this still affects trunk, with the C frontend (the "-O3 -Wall"
aren't needed). The C++ frontend doesn't seem to be affected.
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Subject: [Bug c++/82882] [8 regression] ICE Segmentation fault
Date: Mon, 20 Nov 2017 15:20:00 -0000
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Andrey Guskov <andrey.y.guskov at intel dot com> changed:
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--- Comment #3 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Also seeing this in Qt. Confirmed.
>From gcc-bugs-return-582360-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 15:38:55 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83073] Range for VR_VARYING | [1, 1]
Date: Mon, 20 Nov 2017 15:38:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.
>From gcc-bugs-return-582361-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 15:40:16 2017
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From: "andi-gcc at firstfloor dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83052] [8 Regression] ICE in extract_insn, at recog.c:2305 starting from r254560
Date: Mon, 20 Nov 2017 15:40:00 -0000
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--- Comment #1 from Andi Kleen <andi-gcc at firstfloor dot org> ---
I'm not sure why you call it a regression? You must be running the test suite
manually with the new option.
I haven't tested, but likely it will fail if you run that test with
-mcmodel=large too. The -mforce-indirect-call patch is really only a subset
of -mcmodel=large. Then it would be more a latent bug.
>From gcc-bugs-return-582362-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 15:46:30 2017
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Subject: [Bug target/82981] [7 Regression] unnecessary __multi3 call for mips64r6 linux kernel
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--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42662
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42662&action=edit
gcc8-pr82981-arm.patch
Untested fix for the arm issue.
>From gcc-bugs-return-582363-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 15:48:37 2017
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Subject: [Bug libstdc++/48101] obscure error message with std::set<const int>
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--- Comment #5 from gccbugs at jbapple dot com ---
What is the virtue of making std::allocator<const int> an error? Is this
required by the standard? Is it because calls to construct are writing to const
memory?
>From gcc-bugs-return-582364-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 15:50:57 2017
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Subject: [Bug bootstrap/81315] powerpc64 vs building lang/gcc7-devel (on FreeBSD head): xgcc gets segmentation fault
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Builds fine on powerpc64-linux, both trunk and 7.
>From gcc-bugs-return-582365-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:03:45 2017
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
Date: Mon, 20 Nov 2017 16:03:00 -0000
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--- Comment #30 from Uroš Bizjak <ubizjak at gmail dot com> ---
Another unhandled case:
--cut here--
typedef __SIZE_TYPE__ size_t;
void baz (char *buf, size_t base, unsigned int data)
{
buf[base] = data;
buf[base+1] = data >> 8;
}
--cut here--
compiles to:
movb %dl, (%rdi,%rsi)
movb %dh, 1(%rdi,%rsi)
ret
>From gcc-bugs-return-582366-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:04:11 2017
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Subject: [Bug c/83056] GCC suggests the use of previously reported undeclared identifiers when reporting new undeclared identifiers
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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>From gcc-bugs-return-582367-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:13:16 2017
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/83048] wrap multi-statement macros in do {} while (0)
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--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #2)
> I wonder if we could use a macro like this:
> ...
> #define SAFE_MACRO_STMT(stmt) \
Submitted RFC at https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01782.html .
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Subject: [Bug libstdc++/48101] obscure error message with std::set<const int>
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You can't allocate const memory, but in essence yes, that's the reason. The
standard says that an allocator's value type must be a non-const, non-volatile
object type, so std::allocator<const T> is undefined behaviour.
>From gcc-bugs-return-582369-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:19:00 2017
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Subject: [Bug tree-optimization/83026] missing strlen optimization for strcmp of unequal strings
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Qing Zhao <qing.zhao at oracle dot com> changed:
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----------------------------------------------------------------------------
CC| |qing.zhao at oracle dot com
--- Comment #2 from Qing Zhao <qing.zhao at oracle dot com> ---
This is reasonable. I will add the support for this into my implementation for
PR78809.
>From gcc-bugs-return-582370-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:20:46 2017
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Subject: [Bug middle-end/79538] missing -Wformat-overflow with %s and non-member array arguments
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--- Comment #2 from Qing Zhao <qing.zhao at oracle dot com> ---
this is because the routine "get_range_strlen" misses the handling of regular
arrays. adding the support should fix this issue.
>From gcc-bugs-return-582371-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:27:00 2017
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Subject: [Bug gcov-profile/83030] [8 regression] ICE in create_pseudo_cfg, at dwarf2cfi.c:2840
Date: Mon, 20 Nov 2017 16:27:00 -0000
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--- Comment #3 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
> Uni-Bielefeld.DE> ---
>> --- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
[...]
>> Can you please bisect to a single revision?
>
> Sure, will do.
The reghunt has now completed, identifying
2017-11-14 Jan Hubicka <hubicka@ucw.cz>
* cfgloopmanip.c (duplicate_loop_to_header_edge): Cleanup profile
manipulation.
Rainer
>From gcc-bugs-return-582372-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:32:16 2017
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Subject: [Bug debug/82933] [8 Regression] valgrind error in set_cur_line_info_table with -g
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The problem is that dwarf2out.c relies on
(*debug_hooks->assembly_start) ();
being called before any RTL is finalized, which the __RTL handling in the C FE
violates. This debug hook also can't be called more than once, and is invoked
by cgraph.
Would it be possible to stash the RTL somewhere into struct function or the
tree, just set some flag and only perform run_rtl_passes when such a function
is actually queued to be emitted?
>From gcc-bugs-return-582373-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:35:10 2017
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Subject: [Bug libstdc++/48101] obscure error message with std::set<const int>
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Even if we allowed allocator<const T> you still can't use std::set<const T>
because the container code assumes a non-const value type in several places.
>From gcc-bugs-return-582374-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:38:16 2017
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Subject: [Bug tree-optimization/83041] redundant assignment from member array not eliminated
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> I think we have a duplicate bug for this looking like
Yes bug 23094.
>From gcc-bugs-return-582375-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:41:25 2017
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Subject: [Bug debug/82933] [8 Regression] valgrind error in set_cur_line_info_table with -g
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42663
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42663&action=edit
gcc8-pr82933.patch
Or we can just hack around this and hope dwarf2out or others don't rely on some
other hooks to be invoked before actually processing the RTL.
>From gcc-bugs-return-582376-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:46:26 2017
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Subject: [Bug tree-optimization/83041] redundant assignment from member array not eliminated
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=23094
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
For what it's worth, I first noticed it in the following (arguably more
compelling) test case:
$ cat c.c && gcc -g -O2 -S -Wall -fdump-tree-strlen=/dev/stdout c.c
char a[4];
struct A { char a[4]; };
void f (struct A *p)
{
__builtin_strcpy (a, p->a);
__builtin_strcpy (a, p->a);
__builtin_strcpy (a, p->a);
}
;; Function f (f, funcdef_no=0, decl_uid=1897, cgraph_uid=0, symbol_order=1)
f (struct A * p)
{
char[4] * _1;
<bb 2> [local count: 10000]:
_1 = &p_2(D)->a;
__builtin_strcpy (&a, _1);
__builtin_strcpy (&a, _1);
__builtin_strcpy (&a, _1);
return;
}
>From gcc-bugs-return-582377-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:47:04 2017
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Subject: [Bug gcov-profile/83030] [8 regression] ICE in create_pseudo_cfg, at dwarf2cfi.c:2840
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83030
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Investigating.
>From gcc-bugs-return-582378-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 16:53:35 2017
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From: "stvar at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/83074] New: Shared object built with `-pie --coverage' hangs forever
Date: Mon, 20 Nov 2017 16:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83074
Bug ID: 83074
Summary: Shared object built with `-pie --coverage' hangs
forever
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
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CC: marxin at gcc dot gnu.org
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Created attachment 42664
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42664&action=edit
Source code, Makefile and test scenario
Dear maintainers,
While running the testing suite of one of my projects with coverage
instrumentation enabled, I came across the following issue of GCC:
The short story: a shared object built with `-pie --coverage' hangs
forever somewhere in function 'gcov_do_dump' (most likely in function
'compute_summary') in the file 'libgcc/libgcov-driver.c'.
This happens on a GNU/Linux x86_64 machine with GCC 7.2.0 built from
sources (using a stock GCC 4.3.4):
$ make GCC=gcc-7.2.0 COVERAGE=yes -B
gcc-7.2.0 -Wall -Wextra -std=gnu99 -g -I. --coverage -fPIC
-fvisibility=hidden -c foo.c -o foo.o
gcc-7.2.0 -Wl,-L. -Wl,--rpath-link=. --coverage -Wl,--export-dynamic -pie
foo.o -o foo.so
gcc-7.2.0 -Wall -Wextra -std=gnu99 -g -I. --coverage -c bar.c -o bar.o
gcc-7.2.0 -Wl,-L. -Wl,--rpath-link=. --coverage -Wl,-rpath=. -l:foo.so -fPIC
bar.o foo.so -o bar
$ time-out() {
local d="$1"; shift
timeout "$d" "$@"
[ "$?" -eq 124 ] && {
echo >&2 "command timed out: $@"
return 1
}
}
$ ./foo.so
foo.so: version: 0.1
$ time-out 8 ./bar
bar: foo.so: version: 0.1
command timed out: ./bar
$ gdb -q --args ./bar
Reading symbols from ./bar...done.
(gdb) run
Starting program: ./bar
bar: foo.so: version: 0.1
^C
Program received signal SIGINT, Interrupt.
0x00007ffff7bd9012 in gcov_do_dump () from ./foo.so
(gdb) backtrace
#0 0x00007ffff7bd9012 in gcov_do_dump () from ./foo.so
#1 0x00007ffff7bda3f2 in __gcov_exit () from ./foo.so
#2 0x00007ffff7bd84d9 in _GLOBAL__sub_D_00100_1_foo.c () from ./foo.so
#3 0x00007ffff7bd83df in __do_global_dtors_aux () from ./foo.so
#4 0x0000000000000000 in ?? ()
When `-pie' is replaced with `-shared' everything works nice.
Important to mention is that the behavior seen above doesn't occur
with GCC 4.3.4 and 4.8.0 (the only other GCC versions currently at
my disposal).
The story is presented in its entirety in the file 'test.txt' --
bundled within the attached tarball along with the source code
and Makefile that are producing the binaries 'foo.so' and 'bar'.
Sincerely,
Stefan Vargyas.
>From gcc-bugs-return-582379-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 17:07:23 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83075] New: [8 Regression] Invalid strncpy optimization
Date: Mon, 20 Nov 2017 17:07:00 -0000
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Bug ID: 83075
Summary: [8 Regression] Invalid strncpy optimization
Product: gcc
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handle_builtin_stxcpy has:
/* Strncpy() et al. cannot modify the source string. Prevent the rest
of the pass from invalidating the strinfo data. */
if (sisrc)
sisrc->dont_invalidate = true;
and I believe that is just wrong. Consider following testcase:
typedef __SIZE_TYPE__ size_t;
size_t
foo (char *p, char *q)
{
size_t l1 = __builtin_strlen (q);
__builtin_strncpy (p, q, l1);
size_t l2 = __builtin_strlen (q);
return l1 + l2;
}
int
main ()
{
char buf[16] = "abcdef";
if (foo (buf + 6, buf) != 6 + 12)
__builtin_abort ();
return 0;
}
The C99 standard says here:
The strncpy function copies not more than n characters (characters that follow
a null character are not copied) from the array pointed to by s2 to the array
pointed to by s1. If copying takes place between objects that overlap, the
behavior is undefined.
It specifically talks about 2 arrays, not about strings, and I believe there
is no overlap above, the source is the first 6 characters, the destination
starts after that. So IMHO we aren't allowed to optimize away the second
strlen call.
>From gcc-bugs-return-582380-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 17:07:39 2017
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Subject: [Bug tree-optimization/83075] [8 Regression] Invalid strncpy optimization
Date: Mon, 20 Nov 2017 17:07:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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CC| |msebor at gcc dot gnu.org
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>From gcc-bugs-return-582382-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 17:19:43 2017
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From: "pawel_sikora at zoho dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/83077] New: sso-string @ gnu-versioned-namespace.
Date: Mon, 20 Nov 2017 17:19:00 -0000
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Bug ID: 83077
Summary: sso-string @ gnu-versioned-namespace.
Product: gcc
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hi,
i'm using the -std=c++1y and i'd like to use sso-string implementation with
std::__7:: (gnu-versioned-namespace). i don't need a dual-abi. i'd like just a
single-new-abi. afaics in the gcc-7.2.0/libstdc++-v3/acinclude.m4 this isn't
possible.
>From gcc-bugs-return-582381-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 17:19:05 2017
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Subject: [Bug fortran/83076] New: [8 Regression] ICE in gfc_deallocate_scalar_with_status, at fortran/trans.c:1598
Date: Mon, 20 Nov 2017 17:19:00 -0000
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Bug ID: 83076
Summary: [8 Regression] ICE in
gfc_deallocate_scalar_with_status, at
fortran/trans.c:1598
Product: gcc
Version: 8.0
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With testcase from pr78781 comment 2 :
$ gfortran-8-20171029 -c z2.f90 -fcoarray=lib
$
$ gfortran-8-20171105 -c z2.f90 -fcoarray=lib
z2.f90:8:0:
if ( associated(x%z) ) deallocate(x%z)
internal compiler error: in gfc_deallocate_scalar_with_status, at
fortran/trans.c:1598
0x733640 gfc_deallocate_scalar_with_status(tree_node*, tree_node*, tree_node*,
bool, gfc_expr*, gfc_typespec, bool)
../../gcc/fortran/trans.c:1598
0x79fe76 gfc_trans_deallocate(gfc_code*)
../../gcc/fortran/trans-stmt.c:6747
0x72ff57 trans_code
../../gcc/fortran/trans.c:1984
0x793ff3 gfc_trans_if_1
../../gcc/fortran/trans-stmt.c:1325
0x79ad2a gfc_trans_if(gfc_code*)
../../gcc/fortran/trans-stmt.c:1356
0x730047 trans_code
../../gcc/fortran/trans.c:1916
0x756bfc gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6421
0x733ac1 gfc_generate_module_code(gfc_namespace*)
../../gcc/fortran/trans.c:2206
0x6e8abd translate_all_program_units
../../gcc/fortran/parse.c:6078
0x6e8abd gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x72d3bf gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-582383-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 17:21:35 2017
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Subject: [Bug fortran/83078] New: ICE in gfc_typenode_for_spec, at fortran/trans-types.c:1110
Date: Mon, 20 Nov 2017 17:21:00 -0000
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Bug ID: 83078
Summary: ICE in gfc_typenode_for_spec, at
fortran/trans-types.c:1110
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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With an undefined value "n" :
$ cat z1.f90
program p
implicit none
type t
integer :: a(n)
end type t
type(t) :: x = t([1, 2])
end
$ gfortran-8-20171119 -c z1.f90
z1.f90:1:0:
program p
internal compiler error: in gfc_typenode_for_spec, at
fortran/trans-types.c:1110
0x7a9ee3 gfc_typenode_for_spec(gfc_typespec*, int)
../../gcc/fortran/trans-types.c:1110
0x7aa22a gfc_sym_type(gfc_symbol*)
../../gcc/fortran/trans-types.c:2213
0x755974 gfc_get_symbol_decl(gfc_symbol*)
../../gcc/fortran/trans-decl.c:1716
0x7589c7 generate_local_decl
../../gcc/fortran/trans-decl.c:5525
0x71d9ab do_traverse_symtree
../../gcc/fortran/symbol.c:4157
0x759622 generate_local_vars
../../gcc/fortran/trans-decl.c:5725
0x759622 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6372
0x6eb720 translate_all_program_units
../../gcc/fortran/parse.c:6091
0x6eb720 gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x72ff5f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug fortran/83078] ICE in gfc_typenode_for_spec, at fortran/trans-types.c:1110
Date: Mon, 20 Nov 2017 17:22:00 -0000
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
Detected without "implicit none" :
$ cat z2.f90
program p
type t
integer :: a(n)
end type t
type(t) :: x = t([1, 2])
end
$ gfortran-8-20171119 -c z2.f90
z2.f90:3:19:
integer :: a(n)
1
Error: Variable 'n' at (1) in this context must be constant
z2.f90:3:19:
integer :: a(n)
1
Error: Variable 'n' at (1) in this context must be constant
>From gcc-bugs-return-582385-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 17:25:19 2017
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Subject: [Bug fortran/83079] New: ICE in gfc_widechar_to_char, at fortran/scanner.c:198
Date: Mon, 20 Nov 2017 17:25:00 -0000
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Bug ID: 83079
Summary: ICE in gfc_widechar_to_char, at fortran/scanner.c:198
Product: gcc
Version: 8.0
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With this snippet :
$ cat z1.f90
program p
print *, transfer(4_'xy', [4_'a'])
end
$ gfortran-8-20171119 -c z1.f90
f951: internal compiler error: in gfc_widechar_to_char, at
fortran/scanner.c:198
0x70b1a6 gfc_widechar_to_char(unsigned int const*, int)
../../gcc/fortran/scanner.c:198
0x724ff2 gfc_target_interpret_expr(unsigned char*, unsigned long, gfc_expr*,
bool)
../../gcc/fortran/target-memory.c:616
0x7250a7 interpret_array
../../gcc/fortran/target-memory.c:378
0x7250a7 gfc_target_interpret_expr(unsigned char*, unsigned long, gfc_expr*,
bool)
../../gcc/fortran/target-memory.c:567
0x719cc8 gfc_simplify_transfer(gfc_expr*, gfc_expr*, gfc_expr*)
../../gcc/fortran/simplify.c:6618
0x6a4f41 do_simplify
../../gcc/fortran/intrinsic.c:4409
0x6af3ec gfc_intrinsic_func_interface(gfc_expr*, int)
../../gcc/fortran/intrinsic.c:4779
0x6f8745 resolve_unknown_f
../../gcc/fortran/resolve.c:2865
0x6f8745 resolve_function
../../gcc/fortran/resolve.c:3174
0x6f886a gfc_resolve_expr(gfc_expr*)
../../gcc/fortran/resolve.c:6704
0x6fefe2 gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.c:11062
0x6fecb7 gfc_resolve_blocks(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.c:10108
0x6ff0eb gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.c:11052
0x701aca resolve_codes
../../gcc/fortran/resolve.c:16412
0x701bce gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.c:16447
0x6eb54a resolve_all_program_units
../../gcc/fortran/parse.c:6030
0x6eb54a gfc_parse_file()
../../gcc/fortran/parse.c:6280
0x72ff5f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-582386-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 17:25:46 2017
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Subject: [Bug fortran/83079] ICE in gfc_widechar_to_char, at fortran/scanner.c:198
Date: Mon, 20 Nov 2017 17:25:00 -0000
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
While these variants compile :
$ cat z3.f90
program p
print *, transfer('xy', ['a'])
end
$ cat z4.f90
program p
print *, transfer(4_'xy', [4_'ab'])
end
$ cat z5.f90
program p
print *, transfer(4_'xy', 4_'a')
end
>From gcc-bugs-return-582387-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 17:49:39 2017
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Subject: [Bug tree-optimization/83075] [8 Regression] Invalid strncpy optimization
Date: Mon, 20 Nov 2017 17:49:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-20
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Good catch!
>From gcc-bugs-return-582388-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 18:07:14 2017
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Subject: [Bug target/81291] [6/7/8 Regression] wrong code with -O2 -fno-rerun-cse-after-loop -fno-tree-ter -fno-tree-vrp -funroll-loops due to improper carry
Date: Mon, 20 Nov 2017 18:07:00 -0000
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed on trunk. This may be the same as PR82621, which I'll backport this
week.
>From gcc-bugs-return-582389-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 18:14:38 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/83077] sso-string @ gnu-versioned-namespace.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-20
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's not possible. I meant to make it possible for GCC 8 (maybe even switch
make the gnu-versioned-namespace *always* use the new ABI, with no option to
use the old one).
>From gcc-bugs-return-582390-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 18:40:00 2017
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Subject: [Bug middle-end/79538] missing -Wformat-overflow with %s and non-member array arguments
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC|qing.zhao at oracle dot com |
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Qing is on it.
>From gcc-bugs-return-582391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 18:41:07 2017
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Subject: [Bug tree-optimization/83026] missing strlen optimization for strcmp of unequal strings
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Qing is on it.
>From gcc-bugs-return-582392-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 18:52:04 2017
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Subject: [Bug tree-optimization/83080] New: ICE at -Os and above with -Wall on C++ code: Segmentation fault
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83080
Bug ID: 83080
Summary: ICE at -Os and above with -Wall on C++ code:
Segmentation fault
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
This appears to be a recent regression.
$ g++tk -v
Using built-in specs.
COLLECT_GCC=g++tk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171120 (experimental) [trunk revision 254954] (GCC)
$
$ g++tk -O1 -c -Wall tmp.cpp
$ g++-7.2.0 -Os -c -Wall tmp.cpp
$
$ g++tk -Os -c -Wall tmp.cpp
tmp.cpp: In constructor ‘A::A()’:
tmp.cpp:9:9: warning: array subscript 0 is above array bounds of ‘int [0]’
[-Warray-bounds]
b[0][0] = 0;
~~~~~~^
during GIMPLE pass: vrp
tmp.cpp:7:1: internal compiler error: Segmentation fault
A::A ()
^
0xe6ccef crash_signal
../../gcc-source-trunk/gcc/toplev.c:325
0x9abc34 contains_struct_check(tree_node const*, tree_node_structure_enum, char
const*, int, char const*)
../../gcc-source-trunk/gcc/tree.h:3459
0x9abc34 wi::to_wide(tree_node const*)
../../gcc-source-trunk/gcc/tree.h:5247
0x111c4c8 vrp_prop::check_array_ref(unsigned int, tree_node*, bool)
../../gcc-source-trunk/gcc/tree-vrp.c:4811
0x112ea0f vrp_prop::check_array_ref(unsigned int, tree_node*, bool)
../../gcc-source-trunk/gcc/tree-vrp.c:4780
0x112ea0f check_array_bounds
../../gcc-source-trunk/gcc/tree-vrp.c:4984
0x1158ec2 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../gcc-source-trunk/gcc/tree.c:11122
0x115931e walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../gcc-source-trunk/gcc/tree.c:11439
0xbc59c7 walk_gimple_op(gimple*, tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
../../gcc-source-trunk/gcc/gimple-walk.c:221
0x111e542 vrp_prop::check_all_array_refs()
../../gcc-source-trunk/gcc/tree-vrp.c:5030
0x111fff3 vrp_prop::vrp_finalize(bool)
../../gcc-source-trunk/gcc/tree-vrp.c:6791
0x112ec14 execute_vrp
../../gcc-source-trunk/gcc/tree-vrp.c:6864
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
---------------------
struct A
{
A ();
int b[1][0];
};
A::A ()
{
b[0][0] = 0;
}
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Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
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--- Comment #15 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Mon Nov 20 19:09:34 2017
New Revision: 254966
URL: https://gcc.gnu.org/viewcvs?rev=254966&root=gcc&view=rev
Log:
2017-11-20 Paul Thomas <pault@gcc.gnu.org>
PR fortran/79072
* trans-expr.c (trans_class_vptr_len_assignment): Set from_len
if the temporary is unlimited polymorphic.
* trans-stmt.c (trans_associate_var): Use the fake result decl
to obtain the 'len' field from an explicit function result when
in that function scope.
2017-11-20 Paul Thomas <pault@gcc.gnu.org>
PR fortran/79072
* gfortran.dg/class_result_5.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/class_result_5.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/83075] [8 Regression] Invalid strncpy optimization
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fix: https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01800.html
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Subject: [Bug go/83071] gccgo: ICE in set_type
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--- Comment #1 from Ian Lance Taylor <ian at airs dot com> ---
This is of course a compiler bug, but it's a crash on invalid code. You can't
write `input++` when `input` is a string type. In Go the `++` operator only
applies to integer types. When I fix the compiler bug, you will get an error
compiling this code instead of a crash.
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Subject: [Bug target/83052] ICE in extract_insn, at recog.c:2305 starting from r254560
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2017-11-20
Summary|[8 Regression] ICE in |ICE in extract_insn, at
|extract_insn, at |recog.c:2305 starting from
|recog.c:2305 starting from |r254560
|r254560 |
Known to fail| |4.5.0, 5.4.0, 6.4.0, 7.2.0,
| |8.0
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Andi Kleen from comment #1)
> I'm not sure why you call it a regression? You must be running the test
> suite manually with the new option.
Sorry, I was too eager ;) and did PRs for multiple different issues.
It's very old, with -mcmodel=large, all releases I have are affected (4.5.0+).
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Subject: [Bug go/83071] gccgo: ICE in set_type
Date: Mon, 20 Nov 2017 19:57:00 -0000
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--- Comment #2 from pmatos at gcc dot gnu.org ---
(In reply to Ian Lance Taylor from comment #1)
> This is of course a compiler bug, but it's a crash on invalid code. You
> can't write `input++` when `input` is a string type. In Go the `++`
> operator only applies to integer types. When I fix the compiler bug, you
> will get an error compiling this code instead of a crash.
Go beginner here... as in... began today. :)
Thanks for the explanation. Can't wait to try the fixed gccgo.
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Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
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--- Comment #16 from neil.n.carlson at gmail dot com ---
I've confirmed Dominique's findings: Code in comments 0, 5, 11 are working now
with Paul's commit (Thanks!), but comment 12 code still gives an ICE.
Should I create a new PR for that example, or is it fine leaving this PR open?
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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--- Comment #31 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #28)
> Ok, let's go with your patch then.
Committed as r254967:
Author: uros
Date: Mon Nov 20 19:52:14 2017
New Revision: 254967
URL: https://gcc.gnu.org/viewcvs?rev=254967&root=gcc&view=rev
Log:
* config/i386/i386.md (bswaphi2): New expander.
(*bswaphi2_movbe): New insn pattern.
(bswaphi -> rorhi pepehole2): New peephole pattern.
testsuite/ChangeLog:
* gcc.target/i386/movbe-5.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/movbe-5.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-582400-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 20:10:28 2017
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Subject: [Bug fortran/53796] I/O INQUIRE of RECL: If not specified in OPEN, the default value should be returned (sequential access)
Date: Mon, 20 Nov 2017 20:10:00 -0000
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2017-11/msg01807.ht
| |ml
Assignee|unassigned at gcc dot gnu.org |jb at gcc dot gnu.org
--- Comment #18 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01807.html
>From gcc-bugs-return-582401-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 20:11:10 2017
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/77687] frame access after release without redzone on powerpc
Date: Mon, 20 Nov 2017 20:11:00 -0000
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--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Mon Nov 20 20:10:28 2017
New Revision: 254968
URL: https://gcc.gnu.org/viewcvs?rev=254968&root=gcc&view=rev
Log:
rs6000: Don't touch below the stack pointer (PR77687)
With the 32-bit SVR4 ABI we don't have a red zone, so we have to restore
the callee-saved registers before we restore the stack pointer.
The previous fix for this PR failed in two ways, for huge frames: first,
we use a negative offset from r11 in that case, so the (mem:BLK 11) access
does no good; second, sched does not handle accesses to mem:BLK correctly
in this case (does not make dependencies).
This patch fixes it by doing a store to (mem:BLK (scratch)) instead.
This means no unrelated (not to stack) loads/stores can be moved over the
stack restore either, but so be it.
PR target/77687
* config/rs6000/rs6000.md (stack_restore_tie): Store to a scratch
address instead of to r1 and r11.
gcc/testsuite/
PR target/77687
* gcc.target/powerpc/pr77687.c: New testcase.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr77687.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/rs6000/rs6000.md
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-582402-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 20:18:16 2017
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Subject: [Bug target/77687] frame access after release without redzone on powerpc
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Backported to 7; closing as fixed.
>From gcc-bugs-return-582403-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 20:34:24 2017
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83081] New: [8 regression][arm] gcc.dg/pr80218.c fails since r254888
Date: Mon, 20 Nov 2017 20:34:00 -0000
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Bug ID: 83081
Summary: [8 regression][arm] gcc.dg/pr80218.c fails since
r254888
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Hi,
Since r254888, I've noticed that:
FAIL: gcc.dg/pr80218.c scan-rtl-dump-not ira "Invalid sum"
on target arm-none-linux-gnueabi (it still works on arm-none-linux-gnueabihf)
This might be a duplicate of bug #83043.
>From gcc-bugs-return-582404-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 20:36:25 2017
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Subject: [Bug bootstrap/81315] powerpc64 vs building lang/gcc7-devel (on FreeBSD head): xgcc gets segmentation fault
Date: Mon, 20 Nov 2017 20:36:00 -0000
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--- Comment #4 from Mark Millard <markmigm at gmail dot com> ---
(In reply to Segher Boessenkool from comment #3)
> Builds fine on powerpc64-linux, both trunk and 7.
Could you give information on how to set up
and run this test, including pointing to
what distribution to install and the like?
(In my context it would be installed on an
old PowerMac G5 so-called "quad core", if
possible.)
Knowing in more detail what type of context was
able to check this would be handy.
I'm not as familiar with Linux as with FreeBSD.
There may be an issue of big-endian powerp64 vs.
little-endian: FreeBSD is big-endian for the
PowerMac G5 context.
>From gcc-bugs-return-582405-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 20:49:33 2017
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From: "julien at trigofacile dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83011] -Wformat-truncation wrongly computes length (depends on the position of numbers in the addition)
Date: Mon, 20 Nov 2017 20:49:00 -0000
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--- Comment #4 from Julien ÉLIE <julien at trigofacile dot com> ---
Martin, the following thing still puzzles me.
len = 52 * timer_count + 27 + (prefix == NULL ? 0 : strlen(prefix)) + 1;
=> gives a warning, as explained below
len = 1 + 52 * timer_count + 27 + (prefix == NULL ? 0 : strlen(prefix));
=> gives *no* warning
len = 52 * timer_count + 28 + (prefix == NULL ? 0 : strlen(prefix));
=> gives *no* warning
Isn't there an issue to fix in how the checker assumes the size of the
destination?
I do not understand how such a computation could be a feature.
>From gcc-bugs-return-582406-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 20:51:00 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug gcov-profile/83074] Shared object built with `-pie --coverage' hangs forever
Date: Mon, 20 Nov 2017 20:51:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-20
CC| |hjl at gcc dot gnu.org,
| |hubicka at gcc dot gnu.org,
| |jakub at gcc dot gnu.org,
| |matz at gcc dot gnu.org,
| |schwab at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Hi.
Thanks for the report. I isolated the issue and it's related to how
constructors are called and hang in GCOV is just demonstration of the problem.
Please consider this:
$ cat foo.c
__attribute__ ((constructor)) static void
ctor2 ()
{
static int c2 = 0;
__builtin_printf ("ctor2 called\n");
if (c2++ != 0)
__builtin_abort ();
}
int
main (void)
{
}
$ cat bar.c
__attribute__((constructor))
static void ctor1() {
static int c1 = 0;
__builtin_printf ("ctor1 called\n");
if (c1++ != 0)
__builtin_abort ();
}
int main(void)
{
}
Then running:
$ gcc -g -I. -fPIC -c foo.c -o foo.o
$ gcc -g -I. -c bar.c -o bar.o
$ gcc -Wl,-L. -Wl,--export-dynamic -pie foo.o -o foo.so
$ gcc -Wl,-L. -l:foo.so -fPIC bar.o foo.so -o bar
$ ./bar
ctor2 called
ctor2 called
Aborted (core dumped)
Problem is that ctor1 is not called and we instead call ctor2 twice.
Note that clang compiler has the same problem.
To be honest I'm not shared libraries expert, but I'll CC some guys who can
help.
>From gcc-bugs-return-582407-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 20:53:52 2017
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Subject: [Bug target/68690] PowerPC64: TOC save in PHP core loop results in load hit store
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
On trunk it now is (since r254599):
===
std 2,24(1)
.p2align 5,,31
.L4:
ld 9,0(30)
mtctr 9
mr 12,9
bctrl
ld 2,24(1)
addic. 31,31,-1
bne 0,.L4
===
so, fixed.
>From gcc-bugs-return-582408-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 20:55:19 2017
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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--- Comment #32 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to rguenther@suse.de from comment #20)
> Index: gcc/tree-ssa-sccvn.c
> ===================================================================
> --- gcc/tree-ssa-sccvn.c (revision 254945)
> +++ gcc/tree-ssa-sccvn.c (working copy)
> @@ -3632,6 +3632,38 @@ visit_nary_op (tree lhs, gassign *stmt)
The patched compiler works for this particular case (a "break" is needed at the
top of the patch, though), but there are many other cases where a temporary
should be calculated and its value stored, e.g.:
--cut here--
void foo_OK (char *buf, unsigned int data)
{
buf[0] = ~data >> 8;
buf[1] = ~data;
}
void foo (char *buf, unsigned int data)
{
buf[0] = ~data;
buf[1] = ~data >> 8;
}
void bar (char *buf, unsigned int data)
{
buf[0] = -data >> 8;
buf[1] = -data;
}
void baz (char *buf, unsigned int data)
{
buf[0] = (data+3) >> 8;
buf[1] = (data+3);
}
--cut here--
Only foo_OK compiles (-O2 -march=haswell) to expected asm:
notl %esi
movbe %si, (%rdi)
all others generate duplicated operation:
movb %sil, %al
notl %esi
notl %eax
movb %al, (%rdi)
movl %esi, %eax
movb %ah, 1(%rdi)
Should I open a new PR for the above enhancement?
>From gcc-bugs-return-582409-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 21:16:26 2017
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Subject: [Bug c++/83045] [8 Regression] -Wreturn-type regression in C++
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42665
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42665&action=edit
gcc8-pr83045.patch
Patch I wrote for this. Unfortunately it shows up various new warnings, so
I'll need to adjust the testsuite for it tomorrow.
>From gcc-bugs-return-582410-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 22:09:41 2017
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Subject: [Bug middle-end/83074] Shared object built with `-pie --coverage' hangs forever
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--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Martin Liška from comment #1)
> Hi.
>
> Thanks for the report. I isolated the issue and it's related to how
> constructors are called and hang in GCOV is just demonstration of the
> problem.
>
> Please consider this:
>
> $ cat foo.c
> __attribute__ ((constructor)) static void
> ctor2 ()
> {
> static int c2 = 0;
> __builtin_printf ("ctor2 called\n");
> if (c2++ != 0)
> __builtin_abort ();
> }
>
> int
> main (void)
> {
> }
>
> $ cat bar.c
> __attribute__((constructor))
> static void ctor1() {
> static int c1 = 0;
> __builtin_printf ("ctor1 called\n");
> if (c1++ != 0)
> __builtin_abort ();
> }
>
> int main(void)
> {
> }
>
> Then running:
>
> $ gcc -g -I. -fPIC -c foo.c -o foo.o
> $ gcc -g -I. -c bar.c -o bar.o
> $ gcc -Wl,-L. -Wl,--export-dynamic -pie foo.o -o foo.so
Why do you expect you can use a PIE as a shared library?
>From gcc-bugs-return-582411-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 22:31:51 2017
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Subject: [Bug rtl-optimization/70134] combine misses jump optimization on powerpc64le
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
PowerPC has no simple way to set a CR field to "equal". We could add
a pattern to do that (which will cost 2 insns, so works for 3->2
combinations, like we in fact get here; something like li X,0 ; cmpwi X,0 ).
But, this is normally handled by cprop, and in fact it works like you
would hope if you just add -fgcse. So is this a bug, or just something
-O1 does not do?
>From gcc-bugs-return-582412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 22:42:03 2017
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Subject: [Bug middle-end/83074] Shared object built with `-pie --coverage' hangs forever
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--- Comment #3 from Stefan Vargyas <stvar at yahoo dot com> ---
>
> Why do you expect you can use a PIE as a shared library?
>
Well, with `-pie' one can issue 'foo.so' by itself:
$ ./foo.so
foo.so: version 0.1
This feature is quite useful in practice -- for example, the
GNU C library is runnable this way too:
$ /lib64/libc.so.6
GNU C Library stable release version 2.11.3 (20110527), by Roland McGrath et
al.
...
On the other hand, I deem the above use-case to be not that
useful whilest developing a library -- when one may use e.g.
`--coverage'.
Therefore, I myself have no problem with my (real) Makefile
discriminating 'LDFLAGS' as below:
ifeq (${COVERAGE},yes)
CFLAGS += --coverage
LDFLAGS += --coverage -shared
else
LDFLAGS += -pie
endif
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Subject: [Bug middle-end/83074] Shared object built with `-pie --coverage' hangs forever
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Stefan Vargyas from comment #3)
> This feature is quite useful in practice -- for example, the
> GNU C library is runnable this way too:
>
> $ /lib64/libc.so.6
> GNU C Library stable release version 2.11.3 (20110527), by Roland McGrath
> et al.
> ...
libc.so.6 is a shared library, not a PIE. It is normally linked with -shared,
just arranged to have .interp section and a meaningful e_entry in Ehdr.
PIE is something significantly different, in particular it is the executable,
albeit position independent, e.g. required to be the first in symbol search
scope so that its symbols bind locally.
>From gcc-bugs-return-582414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 23:01:52 2017
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Subject: [Bug middle-end/83074] Shared object built with `-pie --coverage' hangs forever
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Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |INVALID
--- Comment #5 from Andreas Schwab <schwab@linux-m68k.org> ---
> $ gcc -Wl,-L. -Wl,--export-dynamic -pie foo.o -o foo.so
Don't use --export-dynamic. This causes __libc_csu_{init,fini} to be shared
between the objects instead of having a private copy in each object.
>From gcc-bugs-return-582415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 23:06:30 2017
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Subject: [Bug tree-optimization/83082] New: [8 regression] libgomp.graphite/force-parallel-1.c fails starting with r254888
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Bug ID: 83082
Summary: [8 regression] libgomp.graphite/force-parallel-1.c
fails starting with r254888
Product: gcc
Version: 8.0
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I am seeing this on powerpc64 both LE and BE:
make -k check-target-libgomp
RUNTESTFLAGS=graphite.exp=libgomp.graphite/force-parallel-1.c
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/libgomp/testsuite/libgomp.graphite/force-parallel-1.c
-B/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/./libgomp/
-B/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/./libgomp/.libs
-I/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/./libgomp
-I/home/seurer/gcc/gcc-test2/libgomp/testsuite/../../include
-I/home/seurer/gcc/gcc-test2/libgomp/testsuite/.. -fmessage-length=0
-fno-diagnostics-show-caret -Wno-hsa -fdiagnostics-color=never -fopenmp -ansi
-pedantic-errors -O2 -ftree-parallelize-loops=4 -floop-parallelize-all
-fdump-tree-parloops-details -fdump-tree-optimized -fno-loop-strip-mine
-fno-loop-block -fdump-tree-graphite-all
-L/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/./libgomp/.libs
-lm -o ./force-parallel-1.exe
PASS: libgomp.graphite/force-parallel-1.c (test for excess errors)
Setting LD_LIBRARY_PATH to
.:/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/./libgomp/.libs:/home/seurer/gcc/build/gcc-test2/gcc:/home/seurer/gcc/build/gcc-test2/gcc/32:.:/home/seurer/gcc/build/gcc-test2/powerpc64-unknown-linux-gnu/./libgomp/.libs:/home/seurer/gcc/build/gcc-test2/gcc:/home/seurer/gcc/build/gcc-test2/gcc/32:/home/seurer/gcc/build/gcc-test2/./gmp/.libs:/home/seurer/gcc/build/gcc-test2/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-test2/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-test2/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-test2/./mpc/src/.libs:/home/seurer/gcc/build/gcc-test2/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-test2/./isl/.libs:/home/seurer/gcc/build/gcc-test2/./prev-isl/.libs:.:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libitm/.libs:/home/seurer/gcc/build/gcc-test2/gcc:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libsanitizer/asan/.libs:.:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libitm/.libs:/home/seurer/gcc/build/gcc-test2/gcc:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libsanitizer/asan/.libs:/home/seurer/gcc/build/gcc-test2/./gmp/.libs:/home/seurer/gcc/build/gcc-test2/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-test2/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-test2/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-test2/./mpc/src/.libs:/home/seurer/gcc/build/gcc-test2/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-test2/./isl/.libs:/home/seurer/gcc/build/gcc-test2/./prev-isl/.libs:/home/seurer/gcc/install/gcc-7.1.0/lib64
spawn [open ...]
PASS: libgomp.graphite/force-parallel-1.c execution test
FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times graphite "2
loops carried no dependency" 1 (found 0 times)
FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times optimized
"loopfn" 8 (found 12 times)
testcase
/home/seurer/gcc/gcc-test2/libgomp/testsuite/libgomp.graphite/graphite.exp
completed in 0 seconds
=== libgomp Summary ===
# of expected passes 2
# of unexpected failures 2
>From gcc-bugs-return-582416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 20 23:59:07 2017
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From: "h2+bugs at fsfe dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83083] New: c++2a concepts without -fconcepts
Date: Mon, 20 Nov 2017 23:59:00 -0000
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Bug ID: 83083
Summary: c++2a concepts without -fconcepts
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: h2+bugs at fsfe dot org
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Currently GCC offers the Concepts TS via -fconcepts, but it doesn't seem to
offer the modified/reduced Concepts merged into C++2a. For forward
compatibility checks of existing code and also for comparison with other
compilers (which will hopefully start supporting C++2a concepts sometime next
year), it would very, very helpful if GCC8 provided the new
concepts-light-light via the regular -std=c++2a switch (without -fconcepts).
Is this a planned feature or not a priority? Will it make it into GCC8? I know
these things are not trivial, but it seems like it's "only" a subset of already
existing features that "just" needs to be rewired.
Thanks a lot for your work on this!
>From gcc-bugs-return-582417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 00:18:51 2017
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Subject: [Bug target/81356] __builtin_strcpy is not good for copying an empty string on aarch64
Date: Tue, 21 Nov 2017 00:18:00 -0000
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--- Comment #8 from Steve Ellcey <sje at gcc dot gnu.org> ---
Author: sje
Date: Tue Nov 21 00:18:14 2017
New Revision: 254977
URL: https://gcc.gnu.org/viewcvs?rev=254977&root=gcc&view=rev
Log:
2017-11-20 Steve Ellcey <sellcey@cavium.com>
PR target/81356
* gfortran.dg/pr45636.f90 (aarch64*-*-*): Remove from xfail list.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pr45636.f90
>From gcc-bugs-return-582418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 00:31:01 2017
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Subject: [Bug ada/83027] Hang when attaching a SIGINT handler
Date: Tue, 21 Nov 2017 00:31:00 -0000
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--- Comment #17 from Victor Porton <porton at narod dot ru> ---
Created attachment 42666
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42666&action=edit
Minimal example reprising the bug
I've created the minimal example reprising the bug.
The bug is actually awful: Just four innocent (doing nothing) source files
cause the program to hang infinitely despite it was asked to do none.
Note that the bug is triggered only for dynamic libraries.
To reprise the bug unpack the attached minimal.tar.gz archive run
make all && make run
It stucks infinitely.
Now we know for sure: It is a GCC (or maybe linker) bug, not Ahven one.
>From gcc-bugs-return-582419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 00:41:29 2017
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/72786] Odd spelling suggestion with later defined macro: Suggestion is identical to unknown identifier
Date: Tue, 21 Nov 2017 00:41:00 -0000
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--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Tue Nov 21 00:40:53 2017
New Revision: 254978
URL: https://gcc.gnu.org/viewcvs?rev=254978&root=gcc&view=rev
Log:
C++: provide macro used-before-defined hint (PR c++/72786)
This patch uses the name_hint/deferred_diagnostic to provide
a message in the C++ frontend if a macro is used before it is defined
e.g.:
test.c:6:24: error: expected ';' at end of member declaration
virtual void clone() const OVERRIDE { }
^~~~~
;
test.c:6:30: error: 'OVERRIDE' does not name a type
virtual void clone() const OVERRIDE { }
^~~~~~~~
test.c:6:30: note: the macro 'OVERRIDE' had not yet been defined
test.c:15:0: note: it was later defined here
#define OVERRIDE override
It's possible to do it from the C++ frontend as tokenization happens
up-front (and hence the macro already exists when the above is parsed);
I attempted to do it from the C frontend, but because the C frontend only
tokenizes on-demand during parsing, the macro isn't known about until
later.
gcc/cp/ChangeLog:
PR c++/72786
* name-lookup.c (class macro_use_before_def): New class.
(lookup_name_fuzzy): Detect macro that were used before being
defined, and report them as such.
gcc/ChangeLog:
PR c++/72786
* spellcheck.h (best_match::blithely_get_best_candidate): New
accessor.
gcc/testsuite/ChangeLog:
PR c++/72786
* g++.dg/spellcheck-macro-ordering-2.C: New test case.
* g++.dg/spellcheck-macro-ordering.C: Add dg-message directives
for macro used-before-defined.
libcpp/ChangeLog:
PR c++/72786
* include/cpplib.h (cpp_macro_definition_location): New decl.
* macro.c (cpp_macro_definition): New function.
Added:
trunk/gcc/testsuite/g++.dg/spellcheck-macro-ordering-2.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/name-lookup.c
trunk/gcc/spellcheck.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/spellcheck-macro-ordering.C
trunk/libcpp/ChangeLog
trunk/libcpp/include/cpplib.h
trunk/libcpp/macro.c
>From gcc-bugs-return-582420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 00:48:33 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/83011] -Wformat-truncation=2 difficult to avoid for non-constant bounds
Date: Tue, 21 Nov 2017 00:48:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Summary|-Wformat-truncation wrongly |-Wformat-truncation=2
|computes length (depends on |difficult to avoid for
|the position of numbers in |non-constant bounds
|the addition) |
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
There's a difference between
len = 52 * timer_count + 27 + (prefix == NULL ? 0 : strlen(prefix)) + 1;
and
len = 1 + 52 * timer_count + 27 + (prefix == NULL ? 0 : strlen(prefix));
just like there's a difference between
UINT_MAX + 0LU + 1
and
1 + UINT_MAX + 0LU
The former promotes the 1 to unsigned long and evaluates the first addition in
that type (and the constant expression evaluates to 1) while the latter doesn't
promote it and evaluates the fist addition in unsigned long (and the constant
expression evaluates to 0).
The upshot is that the range of len that GCC sees in the first case is [1,
big-number] while in the second it's [0, big-number]. I explained why the
checker warns in the first case. In the second case, calling snprintf with a
zero bound means to essentially have it assume the size is unlimited. So the
checker never warns on this case.
In short, there is no issue with the computation. There is a potential bug in
the program that would occur if (len < strlen (prefix) + 2) were true. In
ILP32 that could happen for example if (timer_count == 82595524) and
(strlen(prefix) >= 20) were both satisfied. In LP64 this can't happen but GCC
doesn't know that (it doesn't know that strlen(prefix) can't be larger than
PTRDIFF_MAX).
Anyway, having said all this I do agree that the warning in this case is too
difficult to deal with and should be adjusted so I'm going to confirm this
report on that basis.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80567] bogus fixit hint for undeclared memset: else
Date: Tue, 21 Nov 2017 00:51:00 -0000
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--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Tue Nov 21 00:50:39 2017
New Revision: 254980
URL: https://gcc.gnu.org/viewcvs?rev=254980&root=gcc&view=rev
Log:
C/C++: more stdlib header hints (PR c/81404)
This patch extends the C frontend's "knowledge" of the C stdlib within
get_c_name_hint to cover some more macros and functions, covering
a case reported in PR c/81404 ("INT_MAX"), so that rather than printing:
t.c:5:12: error: 'INT_MAX' undeclared here (not in a function); did you mean
'__INT_MAX__'?
int test = INT_MAX;
^~~~~~~
__INT_MAX__
we instead print:
t.c:5:12: error: 'INT_MAX' undeclared here (not in a function)
int test = INT_MAX;
^~~~~~~
t.c:5:12: note: 'INT_MAX' is defined in header '<limits.h>'; did you forget
to '#include <limits.h>'?
t.c:1:1:
+#include <limits.h>
t.c:5:12:
int test = INT_MAX;
^~~~~~~
It also adds generalizes some of the code for this (and for the "std::"
namespace hints in the C++ frontend), moving it to a new
c-family/known-headers.cc and .h, and introducing a class known_headers.
This currently just works by scanning a hardcoded array of known
name/header associations, but perhaps in the future could be turned
into some kind of symbol database so that the compiler could record API
uses and use that to offer suggestions e.g.
foo.cc: error: 'myapi::foo' was not declared in this scope
foo.cc: note: 'myapi::foo" was declared in header 'myapi/private.h'
(included via 'myapi/public.h') when compiling 'bar.cc'; did you forget to
'#include "myapi/public.h"'?
or somesuch.
In any case, moving this to a class gives an easier way to locate the
hardcoded knowledge about the stdlib.
The patch also adds similar code to the C++ frontend covering
unqualified names in the standard library, so that rather than just
e.g.:
t.cc:19:13: error: 'NULL' was not declared in this scope
void *ptr = NULL;
^~~~
we can emit:
t.cc:19:13: error: 'NULL' was not declared in this scope
void *ptr = NULL;
^~~~
t.cc:19:13: note: 'NULL' is defined in header '<cstddef>'; did you forget
to '#include <cstddef>'?
t.cc:1:1:
+#include <cstddef>
t.cc:19:13:
void *ptr = NULL;
^~~~
(Also XFAIL for PR c++/80567 added for the C++ testcase; this is a
separate pre-existing bug exposed by the testcase for PR 81404).
gcc/ChangeLog:
PR c/81404
* Makefile.in (C_COMMON_OBJS): Add c-family/known-headers.o.
gcc/c-family/ChangeLog:
PR c/81404
* known-headers.cc: New file, based on material from c/c-decl.c.
(suggest_missing_header): Copied as-is.
(get_stdlib_header_for_name): New, based on get_c_name_hint but
heavily edited to add C++ support. Add some knowledge about
<limits.h>, <stdint.h>, and <wchar.h>.
* known-headers.h: Likewise.
gcc/c/ChangeLog:
PR c/81404
* c-decl.c: Include "c-family/known-headers.h".
(get_c_name_hint): Rename to get_stdlib_header_for_name and move
to known-headers.cc.
(class suggest_missing_header): Move to known-header.h.
(lookup_name_fuzzy): Call get_c_stdlib_header_for_name rather
than get_c_name_hint.
gcc/cp/ChangeLog:
PR c/81404
* name-lookup.c: Include "c-family/known-headers.h"
(lookup_name_fuzzy): Call get_cp_stdlib_header_for_name and
potentially return a new suggest_missing_header hint.
gcc/testsuite/ChangeLog:
PR c/81404
* g++.dg/spellcheck-stdlib.C: New.
* gcc.dg/spellcheck-stdlib.c (test_INT_MAX): New.
Added:
trunk/gcc/c-family/known-headers.cc
trunk/gcc/c-family/known-headers.h
trunk/gcc/testsuite/g++.dg/spellcheck-stdlib.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/Makefile.in
trunk/gcc/c-family/ChangeLog
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/name-lookup.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/spellcheck-stdlib.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/81404] suggested hints for standard C macros should avoid GCC predefined macros
Date: Tue, 21 Nov 2017 00:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81404
--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Tue Nov 21 00:50:39 2017
New Revision: 254980
URL: https://gcc.gnu.org/viewcvs?rev=254980&root=gcc&view=rev
Log:
C/C++: more stdlib header hints (PR c/81404)
This patch extends the C frontend's "knowledge" of the C stdlib within
get_c_name_hint to cover some more macros and functions, covering
a case reported in PR c/81404 ("INT_MAX"), so that rather than printing:
t.c:5:12: error: 'INT_MAX' undeclared here (not in a function); did you mean
'__INT_MAX__'?
int test = INT_MAX;
^~~~~~~
__INT_MAX__
we instead print:
t.c:5:12: error: 'INT_MAX' undeclared here (not in a function)
int test = INT_MAX;
^~~~~~~
t.c:5:12: note: 'INT_MAX' is defined in header '<limits.h>'; did you forget
to '#include <limits.h>'?
t.c:1:1:
+#include <limits.h>
t.c:5:12:
int test = INT_MAX;
^~~~~~~
It also adds generalizes some of the code for this (and for the "std::"
namespace hints in the C++ frontend), moving it to a new
c-family/known-headers.cc and .h, and introducing a class known_headers.
This currently just works by scanning a hardcoded array of known
name/header associations, but perhaps in the future could be turned
into some kind of symbol database so that the compiler could record API
uses and use that to offer suggestions e.g.
foo.cc: error: 'myapi::foo' was not declared in this scope
foo.cc: note: 'myapi::foo" was declared in header 'myapi/private.h'
(included via 'myapi/public.h') when compiling 'bar.cc'; did you forget to
'#include "myapi/public.h"'?
or somesuch.
In any case, moving this to a class gives an easier way to locate the
hardcoded knowledge about the stdlib.
The patch also adds similar code to the C++ frontend covering
unqualified names in the standard library, so that rather than just
e.g.:
t.cc:19:13: error: 'NULL' was not declared in this scope
void *ptr = NULL;
^~~~
we can emit:
t.cc:19:13: error: 'NULL' was not declared in this scope
void *ptr = NULL;
^~~~
t.cc:19:13: note: 'NULL' is defined in header '<cstddef>'; did you forget
to '#include <cstddef>'?
t.cc:1:1:
+#include <cstddef>
t.cc:19:13:
void *ptr = NULL;
^~~~
(Also XFAIL for PR c++/80567 added for the C++ testcase; this is a
separate pre-existing bug exposed by the testcase for PR 81404).
gcc/ChangeLog:
PR c/81404
* Makefile.in (C_COMMON_OBJS): Add c-family/known-headers.o.
gcc/c-family/ChangeLog:
PR c/81404
* known-headers.cc: New file, based on material from c/c-decl.c.
(suggest_missing_header): Copied as-is.
(get_stdlib_header_for_name): New, based on get_c_name_hint but
heavily edited to add C++ support. Add some knowledge about
<limits.h>, <stdint.h>, and <wchar.h>.
* known-headers.h: Likewise.
gcc/c/ChangeLog:
PR c/81404
* c-decl.c: Include "c-family/known-headers.h".
(get_c_name_hint): Rename to get_stdlib_header_for_name and move
to known-headers.cc.
(class suggest_missing_header): Move to known-header.h.
(lookup_name_fuzzy): Call get_c_stdlib_header_for_name rather
than get_c_name_hint.
gcc/cp/ChangeLog:
PR c/81404
* name-lookup.c: Include "c-family/known-headers.h"
(lookup_name_fuzzy): Call get_cp_stdlib_header_for_name and
potentially return a new suggest_missing_header hint.
gcc/testsuite/ChangeLog:
PR c/81404
* g++.dg/spellcheck-stdlib.C: New.
* gcc.dg/spellcheck-stdlib.c (test_INT_MAX): New.
Added:
trunk/gcc/c-family/known-headers.cc
trunk/gcc/c-family/known-headers.h
trunk/gcc/testsuite/g++.dg/spellcheck-stdlib.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/Makefile.in
trunk/gcc/c-family/ChangeLog
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/name-lookup.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/spellcheck-stdlib.c
>From gcc-bugs-return-582423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 00:51:57 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/81404] suggested hints for standard C macros should avoid GCC predefined macros
Date: Tue, 21 Nov 2017 00:51:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Should be fixed on trunk for gcc 8 by r254980.
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Subject: [Bug preprocessor/81794] "would be stringified in traditional C" warning should be controlled by -Wtraditional
Date: Tue, 21 Nov 2017 00:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81794
--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Tue Nov 21 00:57:29 2017
New Revision: 254981
URL: https://gcc.gnu.org/viewcvs?rev=254981&root=gcc&view=rev
Log:
Use -Wtraditional for "would be stringified in traditional C" (PR
preprocessor/81794)
libcpp/ChangeLog:
2017-03-24 Eric Gallager <egall@gwmail.gwu.edu>
PR preprocessor/81794
* macro.c (check_trad_stringification): Have warning be controlled
by -Wtraditional.
gcc/testsuite/ChangeLog:
2017-09-17 Eric Gallager <egall@gwmail.gwu.edu>
PR preprocessor/81794
* gcc.dg/pragma-diag-7.c: Update to include check for
stringification.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pragma-diag-7.c
trunk/libcpp/ChangeLog
trunk/libcpp/macro.c
>From gcc-bugs-return-582425-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 00:58:36 2017
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Subject: [Bug preprocessor/81794] "would be stringified in traditional C" warning should be controlled by -Wtraditional
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Should be fixed by r254981; marking as resolved.
>From gcc-bugs-return-582426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 01:23:09 2017
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Subject: [Bug bootstrap/81315] powerpc64 vs building lang/gcc7-devel (on FreeBSD head): xgcc gets segmentation fault
Date: Tue, 21 Nov 2017 01:23:00 -0000
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--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This was BE, on a compiler that defaults to power4 ("970 without altivec").
I.e. the default for powerpc64-linux.
>From gcc-bugs-return-582427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 01:32:11 2017
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Subject: [Bug bootstrap/81315] powerpc64 vs building lang/gcc7-devel (on FreeBSD head): xgcc gets segmentation fault
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--- Comment #6 from Mark Millard <markmigm at gmail dot com> ---
(In reply to Segher Boessenkool from comment #5)
> This was BE, on a compiler that defaults to power4 ("970 without altivec").
> I.e. the default for powerpc64-linux.
Good to know. Thanks.
I've no clue what or how to build a match to the
test environment and test technique that you used.
So unless I get the time to explore, I'll not be
establishing the repeatability of your result for
comparison to what happened under FreeBSD.
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Subject: [Bug fortran/83057] OPEN(3f) without a filename and without STATUS='SCRATCH' does not produce a warning as being an extension on unassigned files
Date: Tue, 21 Nov 2017 01:54:00 -0000
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--- Comment #2 from urbanjost at comcast dot net ---
A long-standing convention when referencing procedures anprd commands,
especially on Unix platforms is to suffix them with (category[group]) to
distinguish them from English words and to identify if talking about a
procedure or a command. "(3f)" just means a callalable function or procedure, f
typically means Fortran, "c" for the C programming language, "X11" for X11
Windows routines and so on. This helps to clarify such things as sleep,
sleep(1), and sleep(3c) --- respectively meaning "to slumber", the GNU/Linux or
Unix command sleep, and and the C routine sleep.
>From gcc-bugs-return-582429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 01:54:24 2017
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Subject: [Bug rtl-optimization/66552] Missed optimization when shift amount is result of signed modulus
Date: Tue, 21 Nov 2017 01:54:00 -0000
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Trunk does (both -m32 and -m64)
srawi 9,4,5
addze 9,9
slwi 9,9,5
subf 4,9,4
srw 3,3,4
and
rlwinm 4,4,0,27,31
srw 3,3,4
so the original problem is still there.
>From gcc-bugs-return-582430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 02:17:12 2017
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Subject: [Bug tree-optimization/67530] Failure to eliminate dead code produced by vector lowering
Date: Tue, 21 Nov 2017 02:17:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It seems to work fine now (on trunk at least)?
>From gcc-bugs-return-582431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 02:17:47 2017
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Subject: [Bug libfortran/78549] [8 Regression] Very slow formatted internal file output
Date: Tue, 21 Nov 2017 02:17:00 -0000
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--- Comment #25 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Tue Nov 21 02:17:11 2017
New Revision: 254982
URL: https://gcc.gnu.org/viewcvs?rev=254982&root=gcc&view=rev
Log:
2017-11-20 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/78549
* io/io.h (newunit_free): Add declaration. Clean some whitespace.
* io/transfer.c (st_read_done, st_write_done): Call newunit_free.
* io/unit.c (newunit_free): Change type from static void to void.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/io.h
trunk/libgfortran/io/transfer.c
trunk/libgfortran/io/unit.c
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Subject: [Bug tree-optimization/83080] ICE at -Os and above with -Wall on C++ code: Segmentation fault
Date: Tue, 21 Nov 2017 03:32:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-21
CC| |msebor at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Introduced by my r254830.
The problem is that ELTSIZE is zero here:
up_bound_p1 = int_const_binop (TRUNC_DIV_EXPR, maxbound, eltsize);
which makes int_const_binop() fail and return null. The null up_bound_p1 is
then used below:
tree arg = TREE_OPERAND (ref, 0);
HOST_WIDE_INT off;
if (get_addr_base_and_unit_offset (arg, &off))
up_bound_p1 = wide_int_to_tree (sizetype,
wi::sub (wi::to_wide (up_bound_p1),
off));
up_bound_p1 = int_const_binop (TRUNC_DIV_EXPR, maxbound, eltsize);
>From gcc-bugs-return-582433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 03:40:00 2017
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Subject: [Bug c++/83060] ICE on valid C++ code: in ignore_overflows, at cp/cvt.c:583
Date: Tue, 21 Nov 2017 03:40:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Only pointer expressions that compute the value of a pointer that points to the
same [sub]object or just past it are valid. The following is undefined whether
or not there is padding between a.i and a.s:
struct A { int i; int s[8]; } a;
int *p = &a.s[-1];
>From gcc-bugs-return-582434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 05:54:39 2017
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Subject: [Bug target/81325] -fcompare-debug failure on ppc64le
Date: Tue, 21 Nov 2017 05:54:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Closing.
>From gcc-bugs-return-582435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 06:03:32 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83084] New: [7/8 Regression] -fcompare-debug failure on ppc64le
Date: Tue, 21 Nov 2017 06:03:00 -0000
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Bug ID: 83084
Summary: [7/8 Regression] -fcompare-debug failure on ppc64le
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Target Milestone: ---
On ppc64le:
trippels@gcc2-power8 out % cat v8-stack-trace-impl.ii
enum _Lock_policy { _S_atomic };
template <_Lock_policy = _S_atomic> struct A {
bool m_fn1();
int _M_use_count;
};
template <> bool A<>::m_fn1() {
int a;
do
if (a)
return 0;
while (__atomic_compare_exchange_n(&_M_use_count, &a, 0, 1, 4, 0));
}
trippels@gcc2-power8 out % g++ --save-temps -fcompare-debug -O2 -c
v8-stack-trace-impl.ii
g++: error: v8-stack-trace-impl.ii: -fcompare-debug failure
trippels@gcc2-power8 out % diff -u v8-stack-trace-impl.gkd
v8-stack-trace-impl.gk.gkd
--- v8-stack-trace-impl.gkd 2017-11-21 06:00:22.288381883 +0000
+++ v8-stack-trace-impl.gk.gkd 2017-11-21 06:00:22.308382369 +0000
@@ -69,16 +69,16 @@
-> 10)
(code_label # 0 0 8 (nil) [1 uses])
(note # 0 0 [bb 5] NOTE_INSN_BASIC_BLOCK)
-(insn:TI # 0 0 (set (mem/v:BLK (scratch:DI) [ A8])
- (unspec:BLK [
- (mem/v:BLK (scratch:DI) [ A8])
- ] UNSPEC_LWSYNC)) "v8-stack-trace-impl.ii":11# {*lwsync}
- (nil))
(insn:TI # 0 0 (set (reg:SI 10 10 [138])
(unspec_volatile:SI [
(mem/v:SI (reg/f:DI 3 3 [orig:131 this ] [131]) [ S4 A32])
] UNSPECV_LL)) "v8-stack-trace-impl.ii":11# {load_lockedsi}
(nil))
+(insn:TI # 0 0 (set (mem/v:BLK (scratch:DI) [ A8])
+ (unspec:BLK [
+ (mem/v:BLK (scratch:DI) [ A8])
+ ] UNSPEC_LWSYNC)) "v8-stack-trace-impl.ii":11# {*lwsync}
+ (nil))
(insn:TI # 0 0 (set (reg:CC 68 0 [141])
(compare:CC (reg:SI 10 10 [138])
(const_int 0 [0]))) "v8-stack-trace-impl.ii":11# {*cmpsi_signed}
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From: "ian at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug go/83071] gccgo: ICE in set_type
Date: Tue, 21 Nov 2017 06:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83071
--- Comment #3 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Tue Nov 21 06:14:32 2017
New Revision: 254983
URL: https://gcc.gnu.org/viewcvs?rev=254983&root=gcc&view=rev
Log:
compiler: report error for ++/-- applied to a non-numeric type
This avoids a compiler crash.
Fixes GCC PR 83071.
Reviewed-on: https://go-review.googlesource.com/78875
Modified:
trunk/gcc/go/gofrontend/MERGE
trunk/gcc/go/gofrontend/statements.cc
>From gcc-bugs-return-582437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 06:15:55 2017
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Subject: [Bug go/83071] gccgo: ICE in set_type
Date: Tue, 21 Nov 2017 06:15:00 -0000
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Ian Lance Taylor <ian at airs dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Ian Lance Taylor <ian at airs dot com> ---
Fixed.
>From gcc-bugs-return-582438-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 07:29:14 2017
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/83027] program hangs when Ada.Text_IO is with'ed both in executable and shared library
Date: Tue, 21 Nov 2017 07:29:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|wrong-code |
Status|WAITING |NEW
Summary|An innocent do-nothing |program hangs when
|program hangs if linked |Ada.Text_IO is with'ed both
|using shared library |in executable and shared
| |library
--- Comment #18 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Created attachment 42666 [details]
> Minimal example reprising the bug
>
> I've created the minimal example reprising the bug.
>
> The bug is actually awful: Just four innocent (doing nothing) source files
> cause the program to hang infinitely despite it was asked to do none.
>
> Note that the bug is triggered only for dynamic libraries.
Thanks for the small reproducer. This has apparently never worked correctly...
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Subject: [Bug target/82981] [7 Regression] unnecessary __multi3 call for mips64r6 linux kernel
Date: Tue, 21 Nov 2017 07:49:00 -0000
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 21 07:49:14 2017
New Revision: 254986
URL: https://gcc.gnu.org/viewcvs?rev=254986&root=gcc&view=rev
Log:
PR target/82981
* internal-fn.c (expand_mul_overflow): Use OPTAB_WIDEN instead of
OPTAB_DIRECT in calls to expand_simple_binop.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/internal-fn.c
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Subject: [Bug debug/82933] [8 Regression] valgrind error in set_cur_line_info_table with -g
Date: Tue, 21 Nov 2017 07:50:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 21 07:50:15 2017
New Revision: 254987
URL: https://gcc.gnu.org/viewcvs?rev=254987&root=gcc&view=rev
Log:
PR debug/82933
* run-rtl-passes.c: Include debug.h.
(run_rtl_passes): Call debug_hooks->assembly_start.
* dwarf2out.c (dwarf2out_assembly_start): Return early if invoked
multiple times.
* gcc.dg/rtl/x86_64/pr82933.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/rtl/x86_64/pr82933.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
trunk/gcc/run-rtl-passes.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug debug/82718] Bad DWARF5 .debug_loclists generation
Date: Tue, 21 Nov 2017 07:59:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 21 07:59:03 2017
New Revision: 254989
URL: https://gcc.gnu.org/viewcvs?rev=254989&root=gcc&view=rev
Log:
PR debug/82718
* dwarf2out.c (dw_loc_list): If crtl->has_bb_partition, temporarily
set in_cold_section_p to the partition containing loc_list->first.
When seeing loc_list->last_before_switch node, update secname and
perform range_across_switch second partition handling only after that.
* gcc.dg/debug/dwarf2/pr82718-1.c: New test.
* gcc.dg/debug/dwarf2/pr82718-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/debug/dwarf2/pr82718-1.c
trunk/gcc/testsuite/gcc.dg/debug/dwarf2/pr82718-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-582442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 08:02:27 2017
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From: "bradfier at fstab dot me" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83068] Suboptimal code generated with -m32 using MMX reg
Date: Tue, 21 Nov 2017 08:02:00 -0000
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--- Comment #3 from Richard Bradfield <bradfier at fstab dot me> ---
I bisected forward from a few months ago.
The proximate cause is commit r253934, specifically the reduction in cost of
the SSE Load & Store ops, and the costs of moving SSE to and from integer regs.
There's probably more to this than the tuning constants, but if it helps your
investigation, the minimal change required to restore the old behaviour is the
following:
> @@ -2283,13 +2283,13 @@ struct processor_costs core_cost = {
> {6, 6}, /* cost of storing MMX registers
> in SImode and DImode */
> 2, 2, 4, /* cost of moving XMM,YMM,ZMM register */
> - {6, 6, 6, 6, 12}, /* cost of loading SSE registers
> + {8, 8, 8, 8, 12}, /* cost of loading SSE registers
> in 32,64,128,256 and 512-bit */
> {6, 6, 6, 6, 12}, /* cost of unaligned loads. */
> - {6, 6, 6, 6, 12}, /* cost of storing SSE registers
> + {8, 8, 8, 8, 12}, /* cost of storing SSE registers
> in 32,64,128,256 and 512-bit */
> {6, 6, 6, 6, 12}, /* cost of unaligned stores. */
> - 2, 2, /* SSE->integer and integer->SSE moves */
> + 5, 5, /* SSE->integer and integer->SSE moves */
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Subject: [Bug tree-optimization/23094] store ccp, or store copy prop misses an optimization
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 83041 has been marked as a duplicate of this bug. ***
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Subject: [Bug tree-optimization/83041] redundant assignment from member array not eliminated
Date: Tue, 21 Nov 2017 08:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83041
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Dup (has patch).
*** This bug has been marked as a duplicate of bug 23094 ***
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83059] ICE on invalid C++ code: in tree_to_uhwi, at tree.c:6633
Date: Tue, 21 Nov 2017 08:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83059
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 21 08:06:28 2017
New Revision: 254990
URL: https://gcc.gnu.org/viewcvs?rev=254990&root=gcc&view=rev
Log:
PR c++/83059
* c-common.c (get_atomic_generic_size): Use TREE_INT_CST_LOW
instead of tree_to_uhwi, formatting fix.
* config/i386/i386.c (ix86_memmodel_check): Start
-Winvalid-memory-model diagnostics with lowercase letter.
* c-c++-common/pr83059.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/pr83059.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/67530] Failure to eliminate dead code produced by vector lowering
Date: Tue, 21 Nov 2017 08:20:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Known to work| |6.1.0
Resolution|--- |FIXED
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
During GCC 6 we added a late DCE pass which fixes this.
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From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/83027] program hangs when Ada.Text_IO is with'ed both in executable and shared library
Date: Tue, 21 Nov 2017 08:31:00 -0000
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simon at pushface dot org changed:
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----------------------------------------------------------------------------
CC| |simon at pushface dot org
--- Comment #19 from simon at pushface dot org ---
The small reproducer (minimal.tar.gz) doesn’t show the error with
macOS : GCC 6.1.0, GCC 7.1.0, GCC 8.0.0, GNAT GPL 2017
debian jessie: GNAT GPL 2017
NB, for GNAT GPL 2017 I had to add Astrings to the interface set in
ahven_simple_lib.gpr.
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Subject: [Bug tree-optimization/83047] [8 regression] glibc/crypt/crypt_util.c gets miscompiled
Date: Tue, 21 Nov 2017 08:42:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 21 08:41:47 2017
New Revision: 254992
URL: https://gcc.gnu.org/viewcvs?rev=254992&root=gcc&view=rev
Log:
PR tree-optimization/83047
* gimple-ssa-store-merging.c
(imm_store_chain_info::output_merged_store): If the loads with the
same vuse are in different basic blocks, for load_gsi pick a load
location that is dominated by the other loads.
* gcc.dg/pr83047.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr83047.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-store-merging.c
trunk/gcc/testsuite/ChangeLog
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once
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--- Comment #33 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 20 Nov 2017, ubizjak at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78821
>
> --- Comment #32 from Uroš Bizjak <ubizjak at gmail dot com> ---
> (In reply to rguenther@suse.de from comment #20)
>
> > Index: gcc/tree-ssa-sccvn.c
> > ===================================================================
> > --- gcc/tree-ssa-sccvn.c (revision 254945)
> > +++ gcc/tree-ssa-sccvn.c (working copy)
> > @@ -3632,6 +3632,38 @@ visit_nary_op (tree lhs, gassign *stmt)
>
> The patched compiler works for this particular case (a "break" is needed at the
> top of the patch, though), but there are many other cases where a temporary
> should be calculated and its value stored, e.g.:
>
> --cut here--
> void foo_OK (char *buf, unsigned int data)
> {
> buf[0] = ~data >> 8;
> buf[1] = ~data;
> }
>
> void foo (char *buf, unsigned int data)
> {
> buf[0] = ~data;
> buf[1] = ~data >> 8;
> }
>
> void bar (char *buf, unsigned int data)
> {
> buf[0] = -data >> 8;
> buf[1] = -data;
> }
>
> void baz (char *buf, unsigned int data)
> {
> buf[0] = (data+3) >> 8;
> buf[1] = (data+3);
> }
> --cut here--
>
> Only foo_OK compiles (-O2 -march=haswell) to expected asm:
>
> notl %esi
> movbe %si, (%rdi)
>
> all others generate duplicated operation:
>
> movb %sil, %al
> notl %esi
> notl %eax
> movb %al, (%rdi)
> movl %esi, %eax
> movb %ah, 1(%rdi)
>
> Should I open a new PR for the above enhancement?
Ok, I fear we're missing some canonicalization here. For foo we see
<bb 2> :
_1 = (char) data_7(D);
_2 = ~_1;
*buf_9(D) = _2;
_3 = ~data_7(D);
_4 = _3 >> 8;
_6 = (char) _4;
MEM[(char *)buf_9(D) + 1B] = _6;
for bar (patch didn't handle negates which I'm not sure are as easily
handled correctness wise?)
<bb 2> :
_1 = -data_8(D);
_2 = _1 >> 8;
_3 = (char) _2;
*buf_10(D) = _3;
_4 = (unsigned char) data_8(D);
_5 = -_4;
_7 = (char) _5;
MEM[(char *)buf_10(D) + 1B] = _7;
for baz
<bb 2> :
_1 = data_8(D) + 3;
_2 = _1 >> 8;
_3 = (char) _2;
*buf_10(D) = _3;
_4 = (unsigned char) data_8(D);
_5 = _4 + 3;
_7 = (char) _5;
MEM[(char *)buf_10(D) + 1B] = _7;
and it's already the FEs shortening optimization or folding that
makes the operations non-canonical. .original dumps:
*buf = (char) (~data >> 8);
*(buf + 1) = ~(char) data;
*buf = ~(char) data;
*(buf + 1) = (char) (~data >> 8);
*buf = (char) (-data >> 8);
*(buf + 1) = (char) -(unsigned char) data;
*buf = (char) (data + 3 >> 8);
*(buf + 1) = (char) ((unsigned char) data + 3);
note there's conflicting interest from targets like AVR that
prefer truncation to be moved innermost (which would argue
for a CSE-only solution together with aggressive shortening
of operations). In the above case that probably means
(char) (~data >> 8) -> ~(char)(data >> 8) or alternatively
figure we're interested in short only and thus
(char)~(short)data and (char)(~(short)data >> 8) so we can
CSE ~(short)data.
Note that within CSE we have the difficulty that the first
stmt is basically unchangeable with the trick we're doing
right now. This means CSE requires the first stmt to be
in useful canonical form.
That said, bar is easily handled in the proposed patch
(though I have to think about correctness). The other
two can't be done easily - what would fix it would be
not narrowing the ~- operation in the FE. In this
case it is convert_to_integer_1 doing the narrowing
and also fold_unary having a related transform.
Removing the convert_to_integer_1 code fixes the missed
transforms but in baz where we have similar narrowing
being performed for the add...
I suppose we do want to narrow at some point (and in fact
the user might already write ~(char)data ...).
As usual we have conflicting interests here. Note that
undoing narrowing isn't easily done so narrowing very early
is certainly unwanted.
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From: "pmatos at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug go/83071] gccgo: ICE in set_type
Date: Tue, 21 Nov 2017 09:23:00 -0000
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--- Comment #5 from pmatos at gcc dot gnu.org ---
Thanks. It's working.
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
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Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #8 from Andreas Schwab <schwab@linux-m68k.org> ---
Still broken.
>From gcc-bugs-return-582452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 09:29:47 2017
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Subject: [Bug ada/83027] program hangs when Ada.Text_IO is with'ed both in executable and shared library
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--- Comment #20 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Thanks for the small reproducer. This has apparently never worked correctly...
And the workaround is to pass -F to gnatbind for the main program.
>From gcc-bugs-return-582453-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 09:41:12 2017
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From: "igor.v.tsimbalist at intel dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
Date: Tue, 21 Nov 2017 09:41:00 -0000
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--- Comment #9 from igor.v.tsimbalist at intel dot com ---
I do not have an ia64 system at hand to reproduce. Could you please send me the
log file or at least the part with error? Is the error still the same or is it
different
error? Or could you please update the bug with how it fails now?
Igor
> -----Original Message-----
> From: schwab@linux-m68k.org [mailto:gcc-bugzilla@gcc.gnu.org]
> Sent: Tuesday, November 21, 2017 10:24 AM
> To: Tsimbalist, Igor V <igor.v.tsimbalist@intel.com>
> Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure
> on ia64
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83015
>
> Andreas Schwab <schwab@linux-m68k.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|WAITING |NEW
>
> --- Comment #8 from Andreas Schwab <schwab@linux-m68k.org> ---
> Still broken.
>
> --
> You are receiving this mail because:
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
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--- Comment #10 from Andreas Schwab <schwab@linux-m68k.org> ---
See comment#0.
>From gcc-bugs-return-582455-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 09:59:31 2017
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From: "andi at mozilla dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83085] New: Suspicious type qualifiers ignored on cast result type [-Werror=ignored-qualifiers]
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Bug ID: 83085
Summary: Suspicious type qualifiers ignored on cast result type
[-Werror=ignored-qualifiers]
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I'm using this debian snapshop,https://tracker.debian.org/pkg/gcc-8, of gcc8 in
order to build mozilla firefox, and I encountered this potential issue when
building with -Werror=ignored-qualifiers.
>> 2:46.84 In file included from /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Result.h:17:0,
>> 2:46.84 from /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/js/Result.h:119,
>> 2:46.84 from /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/jspubtd.h:22,
>> 2:46.84 from /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/nsCycleCollectionTraversalCallback.h:10,
>> 2:46.84 from /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/nsCycleCollectionNoteChild.h:13,
>> 2:46.84 from /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/nsCOMPtr.h:33,
>> 2:46.84 from /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/nsAutoPtr.h:10,
>> 2:46.84 from /root/firefox-gcc-last/ipc/chromium/src/chrome/common/ipc_message.h:21,
>> 2:46.84 from /root/firefox-gcc-last/ipc/chromium/src/chrome/common/ipc_message_utils.h:22,
>> 2:46.84 from /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/ipc/IPCMessageUtils.h:11,
>> 2:46.84 from /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/ipc/ipdl/_ipdlheaders/mozilla/ipc/IPCStream.h:11,
>> 2:46.84 from /root/firefox-gcc-last/ipc/glue/IPCStreamUtils.h:10,
>> 2:46.84 from /root/firefox-gcc-last/ipc/glue/IPCStreamUtils.cpp:7,
>> 2:46.84 from /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/ipc/glue/Unified_cpp_ipc_glue1.cpp:2:
>> 2:46.84 /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Variant.h: In instantiation of 'typename mozilla::detail::Nth<N, Ts ...>::Type mozilla::Variant<Ts>::extract() [with long unsigned int N = 0; Ts = {const int, const char*, void (*)(nsITimer*, bool, void*, char*, long unsigned int)}; typename mozilla::detail::Nth<N, Ts ...>::Type = const int]':
>> 2:46.84 /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Variant.h:219:7: required from 'static void mozilla::detail::VariantImplementation<Tag, N, T, Ts ...>::moveConstruct(void*, Variant&&) [with Variant = mozilla::Variant<const int, const char*, void (*)(nsITimer*, bool, void*, char*, long unsigned int)>; Tag = unsigned char; long unsigned int N = 0; T = const int; Ts = {const char*, void (*)(nsITimer*, bool, void*, char*, long unsigned int)}]'
>> 2:46.84 /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Variant.h:588:24: required from 'mozilla::Variant<Ts>::Variant(mozilla::Variant<Ts>&&) [with Ts = {const int, const char*, void (*)(nsITimer*, bool, void*, char*, long unsigned int)}]'
>> 2:46.84 /usr/include/c++/8/bits/move.h:193:11: required from 'typename std::enable_if<std::__and_<std::__not_<std::__is_tuple_like<_Tp> >, std::is_move_constructible<_Tp>, std::is_move_assignable<_Tp> >::value>::type std::swap(_Tp&, _Tp&) [with _Tp = mozilla::Variant<const int, const char*, void (*)(nsITimer*, bool, void*, char*, long unsigned int)>; typename std::enable_if<std::__and_<std::__not_<std::__is_tuple_like<_Tp> >, std::is_move_constructible<_Tp>, std::is_move_assignable<_Tp> >::value>::type = void]'
>> 2:46.84 /root/firefox-gcc-last/xpcom/threads/nsTimerImpl.h:98:35: required from here
>> 2:46.84 /root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Variant.h:714:44: error: type qualifiers ignored on cast result type [-Werror=ignored-qualifiers]
>> 2:46.84 return typename detail::Nth<N, Ts...>::Type(Move(as<N>()));
>> 2:46.84
Looking at the code the issue is reported here:
https://dxr.mozilla.org/mozilla-central/source/mfbt/Variant.h?q=return+typename+detail%3A%3ANth%3CN%2C+Ts...%3E%3A%3AType%28Move%28as%3CN%3E%28%29%29%29%3B&redirect_type=single#709
That gets called from here:
https://dxr.mozilla.org/mozilla-central/source/xpcom/threads/nsTimerImpl.h?q=nsTimerImpl.h&redirect_type=direct#98
I personally believe that in this context the warning just adds noise since
nothing dangerous nor standard compliant happens.
>From gcc-bugs-return-582456-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 10:06:09 2017
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Subject: [Bug target/82615] [8 Regression] SPEC CPU2006 453.povray ~10% performance deviation with r248863
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Same for Zen, thus fixed.
>From gcc-bugs-return-582457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 10:07:48 2017
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Subject: [Bug fortran/83076] [8 Regression] ICE in gfc_deallocate_scalar_with_status, at fortran/trans.c:1598
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-582458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 10:08:56 2017
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Subject: [Bug tree-optimization/83080] [8 Regression] ICE at -Os and above with -Wall on C++ code: Segmentation fault
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |8.0
Target Milestone|--- |8.0
Summary|ICE at -Os and above with |[8 Regression] ICE at -Os
|-Wall on C++ code: |and above with -Wall on C++
|Segmentation fault |code: Segmentation fault
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think I've seen a dup as well.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83081] [8 regression][arm] gcc.dg/pr80218.c fails since r254888
Date: Tue, 21 Nov 2017 10:09:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-582461-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 10:10:30 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83085] Suspicious type qualifiers ignored on cast result type [-Werror=ignored-qualifiers]
Date: Tue, 21 Nov 2017 10:10:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Andi from comment #0)
> I'm using this debian snapshop,https://tracker.debian.org/pkg/gcc-8, of gcc8
> in order to build mozilla firefox, and I encountered this potential issue
> when building with -Werror=ignored-qualifiers.
"Doctor, doctor, it hurts when I do this"
*** This bug has been marked as a duplicate of bug 82711 ***
>From gcc-bugs-return-582460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 10:10:30 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83082] [8 regression] libgomp.graphite/force-parallel-1.c fails starting with r254888
Date: Tue, 21 Nov 2017 10:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-582462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 10:10:30 2017
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Subject: [Bug c++/82711] -Wignored-qualifiers could be moved into -Wextra
Date: Tue, 21 Nov 2017 10:10:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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CC| |andi at mozilla dot com
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 83085 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-582463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 10:11:06 2017
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Subject: [Bug target/83084] [7/8 Regression] -fcompare-debug failure on ppc64le
Date: Tue, 21 Nov 2017 10:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-582464-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 10:33:04 2017
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Subject: [Bug fortran/82995] Segmentation fault passing optional argument to intrinsic sum function
Date: Tue, 21 Nov 2017 10:33:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
This would need to be fixed in two parts, in the inlined
version and the library version. I'll take a look at the
library part, that should be rather easy.
>From gcc-bugs-return-582465-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 10:33:09 2017
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
Date: Tue, 21 Nov 2017 10:33:00 -0000
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--- Comment #11 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I was able to bootstrap on ia64 box (terbium) shortly before the unwind changes
went in without the bootstrap miscompare.
So does the miscompare still reproduce for you and if so, would be posible to
attach dumps?
>From gcc-bugs-return-582466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 10:36:13 2017
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Subject: [Bug c/83086] New: valgrind error in recent build
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Bug ID: 83086
Summary: valgrind error in recent build
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I tried a valgrind build of recent gcc trunk with -O3 and got this:
==26140== Conditional jump or move depends on uninitialised value(s)
==26140== at 0x145D303: (anonymous
namespace)::imm_store_chain_info::try_coalesce_bswap((anonymous
namespace)::merged_store_group*, unsigned int, unsigned int)
(gimple-ssa-store-merging.c:2393)
==26140== by 0x146390F: coalesce_immediate_stores
(gimple-ssa-store-merging.c:2575)
==26140== by 0x146390F: terminate_and_process_chain
(gimple-ssa-store-merging.c:3726)
Source code is
254948 jakub if (n.base_addr && vuse_store)
Configure is
../trunk/configure --prefix=/home/dcb/gcc/results.254990.valgrind \
--disable-bootstrap \
--disable-multilib \
--disable-werror \
--enable-checking=valgrind \
--enable-languages=c,c++,fortran
sed 's/-O2/-O3 -funroll-loops -Wtautological-compare/' < Makefile >
Makefile.tmp
mv Makefile.tmp Makefile
>From gcc-bugs-return-582467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 10:46:10 2017
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Subject: [Bug middle-end/78468] [8 regression] libgomp.c/reduction-10.c and many more FAIL
Date: Tue, 21 Nov 2017 10:46:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #44 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixing again.
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
Date: Tue, 21 Nov 2017 10:47:00 -0000
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--- Comment #12 from Andreas Schwab <schwab@linux-m68k.org> ---
See yttrium:/usr/local/gcc.
>From gcc-bugs-return-582469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 10:56:48 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83087] New: -fcf-protection -mcet enabled unconditionally for target libs
Date: Tue, 21 Nov 2017 10:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83087
Bug ID: 83087
Summary: -fcf-protection -mcet enabled unconditionally for
target libs
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
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On x86_64 -fcf-protection -mcet gets enabled unconditionally for target libs.
It should be controlled by a configuration flag instead.
>From gcc-bugs-return-582470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 11:01:49 2017
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From: "cfztol at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83017] DO CONCURRENT not parallelizing
Date: Tue, 21 Nov 2017 11:01:00 -0000
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--- Comment #18 from Christian Felter <cfztol at hotmail dot com> ---
Thanks for the great work!! I've tested the new version and found similar
results.
I think the wrong results (which are actually random results) mean there is
another related bug still, so I've opened bug report 83064 for that.
>From gcc-bugs-return-582471-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 11:05:22 2017
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Subject: [Bug target/83087] -fcf-protection -mcet enabled unconditionally for target libs
Date: Tue, 21 Nov 2017 11:05:00 -0000
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--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
# Add CET specific flags if Intel CET is enabled.
# Check whether --enable-cet was given.
if test "${enable_cet+set}" = set; then :
enableval=$enable_cet;
case "$enableval" in
yes|no|default) ;;
*) as_fn_error "Unknown argument to enable/disable cet" "$LINENO" 5 ;;
esac
else
enable_cet=default
fi
case "$host" in
i[34567]86-*-linux* | x86_64-*-linux*)
case "$enable_cet" in
default)
# Check if assembler supports CET.
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
asm ("setssbsy");
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
enable_cet=yes
else
enable_cet=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
;;
yes)
# Check if assembler supports CET.
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
asm ("setssbsy");
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
else
as_fn_error "assembler with CET support is required for --enable-cet"
"$LINENO" 5
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
;;
esac
;;
*)
enable_cet=no
;;
esac
if test x$enable_cet = xyes; then
CET_FLAGS="-fcf-protection -mcet"
fi
EXTRA_CXX_FLAGS="$EXTRA_CXX_FLAGS $CET_FLAGS"
EXTRA_CFLAGS="$EXTRA_CFLAGS $CET_FLAGS"
>From gcc-bugs-return-582472-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 11:10:38 2017
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Subject: [Bug c/83086] valgrind error in gimple-ssa-store-merging.c for recent build
Date: Tue, 21 Nov 2017 11:10:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
On which source file it is? Can you attach it preprocessed + full command
line?
>From gcc-bugs-return-582473-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 11:10:39 2017
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From: "valeryweber at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83088] New: ICE with -init-derived
Date: Tue, 21 Nov 2017 11:10:00 -0000
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Bug ID: 83088
Summary: ICE with -init-derived
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hi all
the following code is ICEing
v
gfortran-intel-trunk -free -c -finit-derived hfx_libint_wrapper.F90
hfx_libint_wrapper.F90:101:0:
END MODULE hfx_libint_wrapper
internal compiler error: Segmentation fault
0xc2f705 crash_signal
../../gcc-trunk-src/gcc/toplev.c:325
0x6ba206 contains_struct_check
../../gcc-trunk-src/gcc/tree.h:3203
0x6ba206 gfc_conv_structure(gfc_se*, gfc_expr*, int)
../../gcc-trunk-src/gcc/fortran/trans-expr.c:7751
0x674480 gfc_conv_array_initializer(tree_node*, gfc_expr*)
../../gcc-trunk-src/gcc/fortran/trans-array.c:5894
0x6b9dfa gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
../../gcc-trunk-src/gcc/fortran/trans-expr.c:6848
0x69c48f gfc_get_symbol_decl(gfc_symbol*)
../../gcc-trunk-src/gcc/fortran/trans-decl.c:1825
0x69e063 gfc_create_module_variable
../../gcc-trunk-src/gcc/fortran/trans-decl.c:4943
0x653930 do_traverse_symtree
../../gcc-trunk-src/gcc/fortran/symbol.c:4157
0x69d4d2 gfc_generate_module_vars(gfc_namespace*)
../../gcc-trunk-src/gcc/fortran/trans-decl.c:5415
0x66b2c8 gfc_generate_module_code(gfc_namespace*)
../../gcc-trunk-src/gcc/fortran/trans.c:2180
0x6212c2 translate_all_program_units
../../gcc-trunk-src/gcc/fortran/parse.c:6078
0x6212c2 gfc_parse_file()
../../gcc-trunk-src/gcc/fortran/parse.c:6294
0x66775f gfc_be_parse_file
../../gcc-trunk-src/gcc/fortran/f95-lang.c:204
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
cat hfx_libint_wrapper.F90
MODULE hfx_libint_wrapper
USE ISO_C_BINDING, ONLY: C_DOUBLE,&
C_F_POINTER,&
C_F_PROCPOINTER,&
C_INT,&
C_LOC,&
C_PTR,&
c_funptr
IMPLICIT NONE
PRIVATE
INTEGER, PARAMETER :: dp = SELECTED_REAL_KIND(14, 200)
integer,parameter :: build_deriv1_eri_size=10,build_eri_size=2,
libderiv_max_am1=4, &
libint_max_am=4, libint_dvrr_classes_size=1, libint_vrr_classes_size=1,
prim_data_f_size=1
integer, dimension(1):: nco
TYPE, BIND(C) :: prim_data
REAL(C_DOUBLE) :: F(prim_data_f_size)
REAL(C_DOUBLE) :: U(3, 6)
REAL(C_DOUBLE) :: twozeta_a
REAL(C_DOUBLE) :: twozeta_b
REAL(C_DOUBLE) :: twozeta_c
REAL(C_DOUBLE) :: twozeta_d
REAL(C_DOUBLE) :: oo2z
REAL(C_DOUBLE) :: oo2n
REAL(C_DOUBLE) :: oo2zn
REAL(C_DOUBLE) :: poz
REAL(C_DOUBLE) :: pon
REAL(C_DOUBLE) :: oo2p
REAL(C_DOUBLE) :: ss_r12_ss
END TYPE prim_data
TYPE, BIND(C) :: lib_int
TYPE(C_PTR) :: int_stack
TYPE(C_PTR) :: PrimQuartet
REAL(C_DOUBLE) :: AB(3)
REAL(C_DOUBLE) :: CD(3)
TYPE(C_PTR) :: vrr_classes(libint_vrr_classes_size,
libint_vrr_classes_size)
TYPE(C_PTR) :: vrr_stack
END TYPE lib_int
TYPE, BIND(C) :: lib_deriv
TYPE(C_PTR) :: int_stack
TYPE(C_PTR) :: PrimQuartet
TYPE(C_PTR) :: zero_stack
TYPE(C_PTR) :: ABCD(156)
REAL(C_DOUBLE) :: AB(3)
REAL(C_DOUBLE) :: CD(3)
TYPE(C_PTR) :: deriv_classes(12, libint_dvrr_classes_size,
libint_dvrr_classes_size)
TYPE(C_PTR) :: deriv2_classes(144, libint_dvrr_classes_size,
libint_dvrr_classes_size)
TYPE(C_PTR) :: dvrr_classes(libint_dvrr_classes_size,
libint_dvrr_classes_size)
TYPE(C_PTR) :: dvtt_stack
END TYPE lib_deriv
CHARACTER(len=*), PARAMETER, PRIVATE :: moduleN = 'hfx_libint_wrapper'
TYPE(C_FUNPTR), DIMENSION(0:build_eri_size, 0:build_eri_size,
0:build_eri_size, 0:build_eri_size), BIND(C) :: build_eri
TYPE(C_FUNPTR), DIMENSION(0:build_deriv1_eri_size, 0:build_deriv1_eri_size,
&
0:build_deriv1_eri_size, 0:build_deriv1_eri_size),
BIND(C) :: build_deriv1_eri
INTERFACE
SUBROUTINE build_deriv1(deriv, np) BIND(C)
IMPORT
TYPE(lib_deriv) :: deriv
INTEGER(KIND=C_INT), VALUE :: np
END SUBROUTINE build_deriv1
END INTERFACE
CONTAINS
SUBROUTINE get_derivs(n_d, n_c, n_b, n_a, deriv, prim, work_forces,
a_mysize)
INTEGER, INTENT(IN) :: n_d, n_c, n_b, n_a
TYPE(lib_deriv) :: deriv
TYPE(prim_data), TARGET :: prim
REAL(dp), DIMENSION(nco(n_a)*nco(n_b)*nco(n_c)*nco&
(n_d), 12) :: work_forces
INTEGER :: a_mysize(1)
PROCEDURE(build_deriv1), POINTER :: pbuild_deriv1
TYPE(C_PTR) :: pc_result
REAL(C_DOUBLE), DIMENSION(:), POINTER :: tmp_data
INTEGER :: i, k
deriv%PrimQuartet = C_LOC(prim)
CALL C_F_PROCPOINTER(build_deriv1_eri(n_d, n_c, n_b, n_a), pbuild_deriv1)
CALL pbuild_deriv1(deriv, 1)
DO k = 1, 12
IF (k == 4 .OR. k == 5 .OR. k == 6) CYCLE
pc_result = deriv%ABCD(k)
CALL C_F_POINTER(pc_result, tmp_data, a_mysize)
DO i = 1, a_mysize(1)
work_forces(i, k) = tmp_data(i)
ENDDO
END DO
END SUBROUTINE get_derivs
END MODULE hfx_libint_wrapper
>From gcc-bugs-return-582474-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 11:11:34 2017
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From: "igor.v.tsimbalist at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83087] -fcf-protection -mcet enabled unconditionally for target libs
Date: Tue, 21 Nov 2017 11:11:00 -0000
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igor.v.tsimbalist at intel dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |igor.v.tsimbalist at intel dot com
--- Comment #2 from igor.v.tsimbalist at intel dot com ---
It's controlled by --enable-cet configuration flag.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
Date: Tue, 21 Nov 2017 11:13:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> GCC revision r254890
Are you sure of the revision? I more or less confirm your results with r254966,
but not with r254940 (the Unrolled do-loop is parallelized with -Ofast only and
gives the correct result). Also -ftree-parallelize-loops=4 gives the same
results as r254940.
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Subject: [Bug c/83086] valgrind error in gimple-ssa-store-merging.c for recent build
Date: Tue, 21 Nov 2017 11:14:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Actually no need, I see what's going on.
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Subject: [Bug target/83087] -fcf-protection -mcet enabled unconditionally for target libs
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--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to igor.v.tsimbalist from comment #2)
> It's controlled by --enable-cet configuration flag.
Unfortunately it isn't. It only checksif the assembler supports CET and then
enables it.
Without an explicit --enable-cet configuration flag it should be disabled.
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Subject: [Bug tree-optimization/83086] [8 Regression] valgrind error in gimple-ssa-store-merging.c for recent build
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-21
Component|c |tree-optimization
Target Milestone|--- |8.0
Summary|valgrind error in |[8 Regression] valgrind
|gimple-ssa-store-merging.c |error in
|for recent build |gimple-ssa-store-merging.c
| |for recent build
Ever confirmed|0 |1
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Untested fix:
2017-11-21 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/83086
* gimple-ssa-store-merging.c
(imm_store_chain_info::try_coalesce_bswap): Test this_n.base_addr
rather than n.base_addr.
--- gcc/gimple-ssa-store-merging.c.jj 2017-11-21 09:41:00.000000000 +0100
+++ gcc/gimple-ssa-store-merging.c 2017-11-21 12:13:23.346947756 +0100
@@ -2390,7 +2390,7 @@ imm_store_chain_info::try_coalesce_bswap
? try_size - info->bitsize - bitpos
: bitpos))
return false;
- if (n.base_addr && vuse_store)
+ if (this_n.base_addr && vuse_store)
{
unsigned int j;
for (j = first; j <= last; ++j)
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Subject: [Bug fortran/83088] [8 Regression] ICE with -init-derived
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
CC| |foreese at gcc dot gnu.org
Summary|ICE with -init-derived |[8 Regression] ICE with
| |-init-derived
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed, likely due to r254648.
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Subject: [Bug target/83087] -fcf-protection -mcet enabled unconditionally for target libs
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--- Comment #4 from igor.v.tsimbalist at intel dot com ---
Yes, that's true. It was done deliberately so the libraries get ready for Intel
CET, it was reflected in commit message and changelog. The binaries compiled
with CET will continue to work on HW without CET support. Why it should not be
enabled by default?
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Subject: [Bug fortran/83076] [8 Regression] ICE in gfc_deallocate_scalar_with_status, at fortran/trans.c:1598
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed between revisions r254227 (2017-10-30, OK) and r254498 (2017-11-07,
ICE).
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Subject: [Bug target/83087] -fcf-protection -mcet enabled unconditionally for target libs
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
My understanding has been that the CET stuff is essentially ABI incompatible
(CET enabled libraries/binaries vs. non-CET enabled ones) on CET HW, so it
should be better treated like a multilib.
So, unless everything on the system is CET enabled, putting the CET support in
is just waste of I-cache.
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Subject: [Bug target/83087] -fcf-protection -mcet enabled unconditionally for target libs
Date: Tue, 21 Nov 2017 11:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83087
--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to igor.v.tsimbalist from comment #4)
> Yes, that's true. It was done deliberately so the libraries get ready for
> Intel CET, it was reflected in commit message and changelog. The binaries
> compiled with CET will continue to work on HW without CET support. Why it
> should not be enabled by default?
Because it bloats the binaries unnecessary?
Not sure about the additional run-time cost on non CET chips.
I guess most gcc users don't have CET capable hardware.
>From gcc-bugs-return-582484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 11:47:30 2017
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Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
Date: Tue, 21 Nov 2017 11:47:00 -0000
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--- Comment #2 from Christian Felter <cfztol at hotmail dot com> ---
I did "svn up" and after that I found the revision number like this:
$ svn log --limit 1
------------------------------------------------------------------------
r254890 | hjl | 2017-11-17 19:37:58 +0100 (Fri, 17 Nov 2017) | 14 lines
... more output, skipped
I hope that is the right way ?
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Subject: [Bug preprocessor/81794] "would be stringified in traditional C" warning should be controlled by -Wtraditional
Date: Tue, 21 Nov 2017 11:52:00 -0000
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--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #6)
> Should be fixed by r254981; marking as resolved.
Thank you!
>From gcc-bugs-return-582486-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:03:58 2017
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Subject: [Bug tree-optimization/83089] New: [8 Regression] ICE: Segmentation fault (in instantiate_scev_name)
Date: Tue, 21 Nov 2017 12:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83089
Bug ID: 83089
Summary: [8 Regression] ICE: Segmentation fault (in
instantiate_scev_name)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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gcc-8.0.0-alpha20171119 snapshot (r254939) ICEs when compiling the following
snippet w/ -O2 (-O3, -Ofast) -ftree-loop-if-convert -ftree-parallelize-loops=2:
int rl, s8;
void
it (int zy, short int el)
{
int hb;
while (el != 0)
{
hb = el;
for (rl = 0; rl < 200; ++rl)
{
for (s8 = 0; s8 < 2; ++s8)
{
}
if (s8 < 3)
zy = hb;
if (hb == 0)
++s8;
zy += (s8 != -1);
}
el = zy;
}
}
% gcc-8.0.0-alpha20171119 -O2 -ftree-loop-if-convert -ftree-parallelize-loops=2
-c harzrp6v.c
during GIMPLE pass: cunroll
harzrp6v.c: In function 'it':
harzrp6v.c:4:1: internal compiler error: Segmentation fault
it (int zy, short int el)
^~
0xc6c84f crash_signal
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/toplev.c:325
0xd1ce15 tree_check(tree_node*, char const*, int, char const*, tree_code)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree.h:3089
0xd1ce15 instantiate_scev_name
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-scalar-evolution.c:2359
0xd1dae5 instantiate_scev_convert
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-scalar-evolution.c:2611
0xd1d36f instantiate_scev_r
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-scalar-evolution.c:2746
0xd1dd1f resolve_mixers(loop*, tree_node*, bool*)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-scalar-evolution.c:2842
0xd1fe88 analyze_scalar_evolution_in_loop
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-scalar-evolution.c:2210
0xd1ff95 simple_iv_with_niters(loop*, loop*, tree_node*, affine_iv*,
tree_node**, bool)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-scalar-evolution.c:3325
0xd857d4 number_of_iterations_exit_assumptions(loop*, edge_def*,
tree_niter_desc*, gcond**, bool)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-ssa-loop-niter.c:2358
0xd85b81 number_of_iterations_exit_assumptions(loop*, edge_def*,
tree_niter_desc*, gcond**, bool)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-ssa-loop-niter.c:2455
0xd85b81 number_of_iterations_exit(loop*, edge_def*, tree_niter_desc*, bool,
bool)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-ssa-loop-niter.c:2442
0xd1ba7d number_of_latch_executions(loop*)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-scalar-evolution.c:2902
0xd875df estimate_numbers_of_iterations(loop*)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-ssa-loop-niter.c:3914
0xd87d27 estimate_numbers_of_iterations(function*)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-ssa-loop-niter.c:4149
0xd67a51 tree_unroll_loops_completely(bool, bool)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-ssa-loop-ivcanon.c:1367
0xd67d0d execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-ssa-loop-ivcanon.c:1525
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Subject: [Bug c++/60095] Dubious diagnostics for attempted surrogate call function
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #3)
> (In reply to lucdanton from comment #0)
> > Using ‘gcc version 4.9.0 20140123 (experimental) (GCC)’ with the following
> > snippet:
> >
> > //--------
> >
> > struct foo {
> > typedef void(*ptr)(int&);
> > operator ptr() const;
> > };
> >
> > int main()
> > {
> > foo f;
> > void* p = 0;
> > f(p);
> > }
> >
> > //--------
> >
> > $ g++-trunk -std=c++03 main.cpp
> > main.cpp: In function 'int main()':
> > main.cpp:10:8: error: no match for call to '(foo) (void*&)'
> > f(p);
> > ^
> > main.cpp:1:8: note: candidate is:
> > struct foo {
> > ^
> > main.cpp:10:8: note: foo::ptr {aka void (*)(int&)} <conversion>
> > f(p);
> > ^
> > main.cpp:10:8: note: candidate expects 2 arguments, 2 provided
> >
> > Same output for all -std=c++{03,11,1y} modes. If e.g. foo has a call
> > operator instead, then the appropriate ‘no known conversion for argument 1
> > from 'void*' to 'int&'’ is produced.
>
> Message is now:
>
> $ /usr/local/bin/g++ -c -std=c++03 -Wall -Wextra -pedantic 60095.cc
> 60095.cc: In function ‘int main()’:
> 60095.cc:10:8: error: no match for call to ‘(foo) (void*&)’
> f(p);
> ^
> 60095.cc:10:8: note: candidate: ‘foo::ptr {aka void (*)(int&)}’ <conversion>
> 60095.cc:10:8: note: conversion of argument 2 would be ill-formed:
> 60095.cc:10:8: error: invalid conversion from ‘void*’ to ‘int’ [-fpermissive]
> 60095.cc:10:8: error: cannot bind rvalue ‘(int)p’ to ‘int&’
> $
>
> Is that better enough for you? I think it's still kinda confusing, but at
> least there's no longer the bogus "expects 2 arguments, 2 provided" note
> anymore.
No reply so I guess it's better enough.
>From gcc-bugs-return-582489-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:08:10 2017
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Subject: [Bug target/83084] [7/8 Regression] -fcompare-debug failure on ppc64le
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
Ever confirmed|0 |1
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Subject: [Bug target/83084] [7/8 Regression] -fcompare-debug failure on ppc64le
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aoliva at gcc dot gnu.org,
| |jakub at gcc dot gnu.org,
| |vmakarov at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems this breaks during sched1, which given:
(insn 10031 10029 8 5 (set (mem/v:BLK (scratch:DI) [0 A8])
(unspec:BLK [
(mem/v:BLK (scratch:DI) [0 A8])
] UNSPEC_LWSYNC)) "pr83084.C":11 683 {*lwsync}
(nil))
(debug_insn 8 10031 10032 5 (var_location:SI D#2 (unspec_volatile:SI [
(mem/v:SI (reg/f:DI 131 [ this ]) [-1 S4 A32])
] UNSPECV_LL)) -1
(nil))
(insn 10032 8 10033 5 (set (reg:SI 138)
(unspec_volatile:SI [
(mem/v:SI (reg/f:DI 131 [ this ]) [-1 S4 A32])
] UNSPECV_LL)) "pr83084.C":11 694 {load_lockedsi}
(nil))
with the debug_insn of course missing for -g0 reorders them if the debug_insn
is in there to:
(insn 10032 10029 10031 5 (set (reg:SI 138)
(unspec_volatile:SI [
(mem/v:SI (reg/f:DI 131 [ this ]) [-1 S4 A32])
] UNSPECV_LL)) "pr83084.C":11 694 {load_lockedsi}
(nil))
(insn 10031 10032 8 5 (set (mem/v:BLK (scratch:DI) [0 A8])
(unspec:BLK [
(mem/v:BLK (scratch:DI) [0 A8])
] UNSPEC_LWSYNC)) "pr83084.C":11 683 {*lwsync}
(nil))
(debug_insn 8 10031 10033 5 (var_location:SI D#2 (clobber (const_int 0 [0])))
-1
(nil))
but without the debug_insn keeps them as is.
>From gcc-bugs-return-582491-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:12:55 2017
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Subject: [Bug tree-optimization/83047] [8 regression] glibc/crypt/crypt_util.c gets miscompiled
Date: Tue, 21 Nov 2017 12:12:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-582490-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:12:02 2017
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Subject: [Bug target/83084] [7/8 Regression] -fcompare-debug failure on ppc64le
Date: Tue, 21 Nov 2017 12:12:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The sched1 dump differences are:
// rs6000_sched_reorder :
// rs6000_variable_issue (more = 7) = 0
-;; 0--> b 1: i10031 [scratch]=unspec[[scratch]] 36
:DU_both_power8,LSU_power8:GENERAL_REGS+0(0)VSX_REGS+0(0)CR_REGS+0(0)SPECIAL_REGS+0(0):model
0
+;; 0--> b 1: i10032 r138=unspec/v[[r131]] 1
:DU_both_power8,LU_or_LSU_power8:GENERAL_REGS+1(1)VSX_REGS+0(0)CR_REGS+0(0)SPECIAL_REGS+0(0)
+rescanning insn with uid = 8.
// rs6000_sched_reorder2 :
// rs6000_sched_reorder :
// rs6000_variable_issue (more = 7) = 0
-;; 1--> b 1: i10032 r138=unspec/v[[r131]] 1
:DU_both_power8,LU_or_LSU_power8:GENERAL_REGS+1(1)VSX_REGS+0(0)CR_REGS+0(0)SPECIAL_REGS+0(0):model
1
+;; 1--> b 1: i10031 [scratch]=unspec[[scratch]] 36
:DU_both_power8,LSU_power8:@GENERAL_REGS+0(0)@VSX_REGS+0(0)@CR_REGS+0(0)@SPECIAL_REGS+0(0):model
0
+;; 1--> b 1: i 8 loc clobber
:nothing:GENERAL_REGS+0(0)VSX_REGS+0(0)CR_REGS+0(0)SPECIAL_REGS+0(0)
// rs6000_sched_reorder2 :
>From gcc-bugs-return-582492-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:14:45 2017
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Subject: [Bug c++/82781] [6/7 Regression] Vector extension operators return wrong result in constexpr
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7/8 Regression] Vector |[6/7 Regression] Vector
|extension operators return |extension operators return
|wrong result in constexpr |wrong result in constexpr
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-582493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:18:22 2017
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Subject: [Bug fortran/83057] OPEN without a filename and without STATUS='SCRATCH' could produce a warning
Date: Tue, 21 Nov 2017 12:18:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Priority|P3 |P5
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
Summary|OPEN(3f) without a filename |OPEN without a filename and
|and without |without STATUS='SCRATCH'
|STATUS='SCRATCH' does not |could produce a warning
|produce a warning as being |
|an extension on unassigned |
|files |
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed. As said in
https://groups.google.com/forum/#!topic/comp.lang.fortran/qZk0eLZ1l18: "it may
be processor-dependent as to whether any diagnostics is issued".
Marked as enhancement.
>From gcc-bugs-return-582494-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:23:34 2017
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Subject: [Bug tree-optimization/83082] [8 regression] libgomp.graphite/force-parallel-1.c fails starting with r254888
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |jakub at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 83043 ***
>From gcc-bugs-return-582495-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:23:35 2017
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Subject: [Bug tree-optimization/83043] [8 Regression] FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times graphite "2 loops carried no dependency" 1 (found 0 times)
Date: Tue, 21 Nov 2017 12:23:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |seurer at gcc dot gnu.org
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 83082 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-582496-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:25:40 2017
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Subject: [Bug fortran/83078] ICE in gfc_typenode_for_spec, at fortran/trans-types.c:1110
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (8.0).
>From gcc-bugs-return-582497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:27:21 2017
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Subject: [Bug fortran/83079] ICE in gfc_widechar_to_char, at fortran/scanner.c:198
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (8.0).
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83044] [8 Regression] ice in contains_struct_check
Date: Tue, 21 Nov 2017 12:28:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Cleaned up testcase:
/* PR tree-optimization/83044 */
/* { dg-do compile } */
/* { dg-options "-Wall -std=gnu89 -O2" } */
struct A { int b[0]; };
struct B { struct A c[0]; };
void bar (int *);
void
foo (void)
{
struct B d;
bar (d.c->b);
}
>From gcc-bugs-return-582500-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:30:53 2017
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Subject: [Bug libfortran/83070] -Wsign-compare warning in eoshift0
Date: Tue, 21 Nov 2017 12:30:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed on trunk (8.0).
>From gcc-bugs-return-582499-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:30:52 2017
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From: "igor.v.tsimbalist at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83087] -fcf-protection -mcet enabled unconditionally for target libs
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--- Comment #7 from igor.v.tsimbalist at intel dot com ---
(In reply to Jakub Jelinek from comment #5)
> My understanding has been that the CET stuff is essentially ABI incompatible
> (CET enabled libraries/binaries vs. non-CET enabled ones) on CET HW, so it
> should be better treated like a multilib.
> So, unless everything on the system is CET enabled, putting the CET support
> in is just waste of I-cache.
It's completely ABI compatible. ABI has not changed. You can mix object files.
But it's true that an app is CET enabled if all object files and libraries
linked in the app are CET enabled.
Code size should increased insignificantly, I do not have numbers right away. I
can collect it for the target libraries and post it here.
>From gcc-bugs-return-582501-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:33:11 2017
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Subject: [Bug target/83087] -fcf-protection -mcet enabled unconditionally for target libs
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to igor.v.tsimbalist from comment #7)
> (In reply to Jakub Jelinek from comment #5)
> > My understanding has been that the CET stuff is essentially ABI incompatible
> > (CET enabled libraries/binaries vs. non-CET enabled ones) on CET HW, so it
> > should be better treated like a multilib.
> > So, unless everything on the system is CET enabled, putting the CET support
> > in is just waste of I-cache.
>
> It's completely ABI compatible. ABI has not changed. You can mix object
> files. But it's true that an app is CET enabled if all object files and
> libraries linked in the app are CET enabled.
So there is some assembler/linker and dynamic linker magic that disables CET
for the process if not all libraries have the CET support? If yes, what
happens if a process where the binary and all libraries it links directly
against are CET enabled and you dlopen a library that is not?
>From gcc-bugs-return-582502-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:38:52 2017
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From: "ivo.raisr at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/82545] [7 Regression] -O2: ICE in gimple_split_edge, at tree-cfg.c:2838, during GIMPLE pass sanopt
Date: Tue, 21 Nov 2017 12:38:00 -0000
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--- Comment #11 from Ivo Raisr <ivo.raisr at oracle dot com> ---
(In reply to Martin Liška from comment #9)
> Fixed on trunk, queued for backports.
I wonder if you had a chance for backporting this into gcc-7 branch?
Let me know if I can be of assistance here.
>From gcc-bugs-return-582503-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:39:53 2017
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Subject: [Bug middle-end/83019] [8 Regression] Compiler dumps predictions with -nan%
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Seems fixed as of revision 254948 [1].
[1] https://gcc.gnu.org/ml/gcc-testresults/2017-11/msg01793.html
>From gcc-bugs-return-582504-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:46:25 2017
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From: "igor.v.tsimbalist at intel dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83087] -fcf-protection -mcet enabled unconditionally for target libs
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--- Comment #9 from igor.v.tsimbalist at intel dot com ---
Yes, there is "magic" and HJ is implementing this interface. Please see his
answer for the similar question:
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg00693.html
>From gcc-bugs-return-582505-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 12:51:42 2017
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Subject: [Bug target/83087] -fcf-protection -mcet enabled unconditionally for target libs
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--- Comment #10 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
% objdump -dS libstdc++.so.6 | grep endbr | wc -l
5508
>From gcc-bugs-return-582507-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 13:24:45 2017
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From: "igor.v.tsimbalist at intel dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83087] -fcf-protection -mcet enabled unconditionally for target libs
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--- Comment #11 from igor.v.tsimbalist at intel dot com ---
So the increase compared to object file size is negligible. Increase of a text
segment is ~1.4%.
>From gcc-bugs-return-582506-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 13:24:37 2017
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Subject: [Bug c++/83046] ICE in nvptx offloading, C++ compilation of libgomp.oacc-c-c++-common/gang-static-2.c
Date: Tue, 21 Nov 2017 13:24:00 -0000
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 42667
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42667&action=edit
Untested patch
>From gcc-bugs-return-582508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 13:25:25 2017
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Subject: [Bug tree-optimization/83044] [8 Regression] ice in contains_struct_check
Date: Tue, 21 Nov 2017 13:25:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42668
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42668&action=edit
gcc8-pr83044.patch
Untested fix.
>From gcc-bugs-return-582509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 13:28:33 2017
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Subject: [Bug c++/83046] ICE in nvptx offloading, C++ compilation of libgomp.oacc-c-c++-common/gang-static-2.c
Date: Tue, 21 Nov 2017 13:28:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #7)
> Created attachment 42667 [details]
> Untested patch
Can you please Thomas test it and send to mailing list (and commit).
Thanks.
>From gcc-bugs-return-582512-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 13:39:56 2017
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Subject: [Bug sanitizer/82545] [7 Regression] -O2: ICE in gimple_split_edge, at tree-cfg.c:2838, during GIMPLE pass sanopt
Date: Tue, 21 Nov 2017 13:39:00 -0000
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--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
I'll backport it today.
>From gcc-bugs-return-582510-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 13:39:52 2017
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Subject: [Bug tree-optimization/82042] signed integer overflow in ao_ref_init_from_ptr_and_size
Date: Tue, 21 Nov 2017 13:39:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Nov 21 13:39:14 2017
New Revision: 255001
URL: https://gcc.gnu.org/viewcvs?rev=255001&root=gcc&view=rev
Log:
Fix UBSAN errors in dse.c (PR rtl-optimization/82044).
2017-11-21 Martin Liska <mliska@suse.cz>
PR rtl-optimization/82044
PR tree-optimization/82042
* dse.c (check_mem_read_rtx): Check for overflow.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dse.c
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Subject: [Bug rtl-optimization/82044] runtime signed integer overflow in check_mem_read_rtx() and all_positions_needed_p() in dse.c
Date: Tue, 21 Nov 2017 13:39:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Nov 21 13:39:14 2017
New Revision: 255001
URL: https://gcc.gnu.org/viewcvs?rev=255001&root=gcc&view=rev
Log:
Fix UBSAN errors in dse.c (PR rtl-optimization/82044).
2017-11-21 Martin Liska <mliska@suse.cz>
PR rtl-optimization/82044
PR tree-optimization/82042
* dse.c (check_mem_read_rtx): Check for overflow.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dse.c
>From gcc-bugs-return-582513-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 13:40:25 2017
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Subject: [Bug rtl-optimization/82044] runtime signed integer overflow in check_mem_read_rtx() and all_positions_needed_p() in dse.c
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Known to work| |8.0
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk, planned for backports.
>From gcc-bugs-return-582514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 13:42:37 2017
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Subject: [Bug fortran/82250] Fortran OpenACC acc_on_device early folding
Date: Tue, 21 Nov 2017 13:42:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2017-11-21
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Is this a gfortran bug/enhancement request?
>From gcc-bugs-return-582515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 13:45:05 2017
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Subject: [Bug fortran/82392] Allign arrays for faster execution
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Would it be possible to have reduced test case?
>From gcc-bugs-return-582516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 13:46:59 2017
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Subject: [Bug sanitizer/82484] [8 Regression] ICE in verify_gimple failed w/ -fsanitizedress
Date: Tue, 21 Nov 2017 13:46:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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From: "porton at narod dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/83027] program hangs when Ada.Text_IO is with'ed both in executable and shared library
Date: Tue, 21 Nov 2017 13:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83027
--- Comment #21 from Victor Porton <porton at narod dot ru> ---
@Eric Botcazou:
Adding binder flag -F solves the problem in the attached examples
https://gcc.gnu.org/bugzilla/attachment.cgi?id=42630 and
https://gcc.gnu.org/bugzilla/attachment.cgi?id=42666 but not in my real code:
https://github.com/vporton/spawn-manager
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Subject: [Bug tree-optimization/83086] [8 Regression] valgrind error in gimple-ssa-store-merging.c for recent build
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 21 13:54:08 2017
New Revision: 255002
URL: https://gcc.gnu.org/viewcvs?rev=255002&root=gcc&view=rev
Log:
PR tree-optimization/83086
* gimple-ssa-store-merging.c
(imm_store_chain_info::try_coalesce_bswap): Test this_n.base_addr
rather than n.base_addr.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-store-merging.c
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Subject: [Bug tree-optimization/83089] [8 Regression] ICE: Segmentation fault (in instantiate_scev_name)
Date: Tue, 21 Nov 2017 14:04:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.
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Subject: [Bug fortran/83088] [8 Regression] ICE with -init-derived
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-582521-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 14:22:23 2017
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Subject: [Bug tree-optimization/83086] [8 Regression] valgrind error in gimple-ssa-store-merging.c for recent build
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug target/82880] [6/7/8 Regression] gcc --help=target --help=optimizers hangs on mips
Date: Tue, 21 Nov 2017 14:50:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 21 14:50:03 2017
New Revision: 255004
URL: https://gcc.gnu.org/viewcvs?rev=255004&root=gcc&view=rev
Log:
PR target/82880
* config/mips/frame-header-opt.c (mips_register_frame_header_opt):
Remove static keyword from f variable.
* gcc.dg/opts-8.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/opts-8.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/mips/frame-header-opt.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/82880] [6/7 Regression] gcc --help=target --help=optimizers hangs on mips
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
Summary|[6/7/8 Regression] gcc |[6/7 Regression] gcc
|--help=target |--help=target
|--help=optimizers hangs on |--help=optimizers hangs on
|mips |mips
Ever confirmed|0 |1
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.0
Known to fail| |7.2.0
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-582525-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:15:47 2017
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Subject: [Bug tree-optimization/83089] [8 Regression] ICE: Segmentation fault (in instantiate_scev_name)
Date: Tue, 21 Nov 2017 15:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83089
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
if-conversion fails to do a scev_reset despite DCEing stmts. testing patch.
>From gcc-bugs-return-582526-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:19:30 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/83034] [8 Regression] ice in mem_loc_descriptor, at dwarf2out.c :15669
Date: Tue, 21 Nov 2017 15:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83034
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-21
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42669
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42669&action=edit
gcc8-pr83034.patch
Untested fix.
>From gcc-bugs-return-582527-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:23:15 2017
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Subject: [Bug gcov-profile/82457] libgcov fork and exec hooks not always used
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.0
Known to fail|8.0 |5.4.0, 6.4.0
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-582528-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:27:40 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83072] Late VRP optimization
Date: Tue, 21 Nov 2017 15:27:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The interesting bit is that during the stmt folding
/* For integral types with undefined overflow and C != 0 fold
x * C EQ/NE y * C into x EQ/NE y. */
(for cmp (eq ne)
(simplify
(cmp (mult:c @0 @1) (mult:c @2 @1))
(if (INTEGRAL_TYPE_P (TREE_TYPE (@1))
&& TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (@0))
&& tree_expr_nonzero_p (@1))
(cmp @0 @2))))
has to apply.
The issue is that when EVRP records value-ranges that only hold temporarily
it doesn't update SSA_NAME_RANGE_INFO but only the internal lattice while
if the range is determined at the SSA definition point it also updates
SSA_NAME_RANGE_INFO.
>From gcc-bugs-return-582529-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:29:33 2017
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Subject: [Bug fortran/34040] Support for DOUBLE_TYPE_SIZE != 64 targets
Date: Tue, 21 Nov 2017 15:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=34040
--- Comment #16 from Joel Sherrill <joel at gcc dot gnu.org> ---
I assume this ICE during a build of bfin-rtems on the master is indicative of
the same underlying problem. I have reported this before on the sh2e but didn't
know of this PR.
libtool: compile: /home/joel/test-gcc/b-bfin-rtems5-gcc/./gcc/xgcc
-B/home/joel/test-gcc/b-bfin-rtems5-gcc/./gcc/ -nostdinc
-B/home/joel/test-gcc/b-bfin-rtems5-gcc/bfin-rtems5/newlib/ -isystem
/home/joel/test-gcc/b-bfin-rtems5-gcc/bfin-rtems5/newlib/targ-include -isystem
/home/joel/test-gcc/gcc/newlib/libc/include
-B/home/joel/test-gcc/install-master/bfin-rtems5/bin/
-B/home/joel/test-gcc/install-master/bfin-rtems5/lib/ -isystem
/home/joel/test-gcc/install-master/bfin-rtems5/include -isystem
/home/joel/test-gcc/install-master/bfin-rtems5/sys-include -DHAVE_CONFIG_H -I.
-I../../../gcc/libgfortran -iquote../../../gcc/libgfortran/io
-I../../../gcc/libgfortran/../gcc -I../../../gcc/libgfortran/../gcc/config
-I../.././gcc -I../../../gcc/libgfortran/../libgcc -I../libgcc
-I../../../gcc/libgfortran/../libbacktrace -I../libbacktrace -I../libbacktrace
-std=gnu11 -Wall -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wextra -Wwrite-strings
-Werror=implicit-function-declaration -Werror=vla -fcx-fortran-rules
-ffunction-sections -fdata-sections -g -O2 -MT sum_c8.lo -MD -MP -MF
.deps/sum_c8.Tpo -c ../../../gcc/libgfortran/generated/sum_c8.c -o sum_c8.o
during RTL pass: reload
../../../gcc/libgfortran/generated/sum_c8.c: In function 'sum_c8':
../../../gcc/libgfortran/generated/sum_c8.c:191:1: internal compiler error: in
require, at machmode.h:282
}
^
0x59f58c opt_mode<machine_mode>::require() const
../../gcc/gcc/machmode.h:282
0x59f58c replace_reg_with_saved_mem
../../gcc/gcc/caller-save.c:1151
0x5a00c6 mark_referenced_regs
../../gcc/gcc/caller-save.c:1073
0x5a00c6 mark_referenced_regs
../../gcc/gcc/caller-save.c:1073
0x5a1105 save_call_clobbered_regs()
../../gcc/gcc/caller-save.c:895
0x9ba530 reload(rtx_insn*, int)
../../gcc/gcc/reload1.c:980
0x8540ce do_reload
../../gcc/gcc/ira.c:5458
0x8540ce execute
../../gcc/gcc/ira.c:5630
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
make[3]: *** [sum_c8.lo] Error 1
>From gcc-bugs-return-582530-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:31:16 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83020] [7 Regression] ('17) Class template constructor call skipped with no error when substitution fails in default argument
Date: Tue, 21 Nov 2017 15:31:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|('17) Class template |[7 Regression] ('17) Class
|constructor call skipped |template constructor call
|with no error when |skipped with no error when
|substitution fails in |substitution fails in
|default argument |default argument
--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Thus, for -std=c++17, this is a 7 Regression. First of all, I think I'm going
to add the testcase to trunk.
>From gcc-bugs-return-582531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:33:01 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/82991] memcpy and strcpy return value can be assumed to be equal to first argument
Date: Tue, 21 Nov 2017 15:33:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Found it (old tree):
Index: tree-ssa-sccvn.c
===================================================================
--- tree-ssa-sccvn.c (revision 254072)
+++ tree-ssa-sccvn.c (working copy)
@@ -4123,6 +4234,25 @@ visit_use (tree use)
changed = defs_to_varying (call_stmt);
goto done;
}
+
+ int rflags = gimple_call_return_flags (call_stmt);
+ if (rflags & ERF_RETURNS_ARG)
+ {
+ unsigned argnum = rflags & ERF_RETURN_ARG_MASK;
+ if (argnum < gimple_call_num_args (call_stmt))
+ {
+ tree arg = gimple_call_arg (call_stmt, argnum);
+ if (TREE_CODE (arg) == SSA_NAME
+ /*|| is_gimple_min_invariant (arg)*/)
+ {
+ changed = visit_copy (lhs, arg);
+ if (gimple_vdef (call_stmt))
+ changed |= set_ssa_val_to (gimple_vdef (call_stmt),
+ gimple_vdef (call_stmt));
+ goto done;
+ }
+ }
+ }
}
/* Pick up flags from a devirtualization target. */
Index: tree-ssa-pre.c
===================================================================
--- tree-ssa-pre.c (revision 254072)
+++ tree-ssa-pre.c (working copy)
@@ -4309,6 +4369,14 @@ eliminate_dom_walker::before_dom_childre
eliminate_push_avail (sprime);
}
+ /* While we might have value numbered a call return value to
+ one of its arguments the call itself might not be solely
+ represented by its return value. Thus do not ignore
+ side-effects indicated by a VARYING vdef. */
+ if (gimple_vdef (stmt)
+ && VN_INFO (gimple_vdef (stmt))->valnum == gimple_vdef (stmt))
+ sprime = NULL_TREE;
+
/* If this now constitutes a copy duplicate points-to
and range info appropriately. This is especially
important for inserted code. See tree-ssa-copy.c
>From gcc-bugs-return-582532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:37:05 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83020] [7 Regression] ('17) Class template constructor call skipped with no error when substitution fails in default argument
Date: Tue, 21 Nov 2017 15:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83020
--- Comment #3 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue Nov 21 15:36:25 2017
New Revision: 255006
URL: https://gcc.gnu.org/viewcvs?rev=255006&root=gcc&view=rev
Log:
2017-11-21 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/83020
* g++.dg/cpp1z/pr83020.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/pr83020.C
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-582533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:38:54 2017
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From: "joel at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83090] New: ICE on lm32-rtems building newlib libm (in require, at machmode.h:282)
Date: Tue, 21 Nov 2017 15:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83090
Bug ID: 83090
Summary: ICE on lm32-rtems building newlib libm (in require, at
machmode.h:282)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: joel at gcc dot gnu.org
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Created attachment 42670
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42670&action=edit
Preprocessed output of file causing ICE
Target: lm32-rtems5
gcc master: 8 79218abbbc680d3329b2e3d460bb0414333f3889
The build fails during newlib's libm. Compiles at -O1 and -Os but not at -O2.
/home/joel/test-gcc/b-lm32-rtems5-gcc/./gcc/xgcc
-B/home/joel/test-gcc/b-lm32-rtems5-gcc/./gcc/ -nostdinc
-B/home/joel/test-gcc/b-lm32-rtems5-gcc/lm32-rtems5/mmultiply-enabled/newlib/
-isystem
/home/joel/test-gcc/b-lm32-rtems5-gcc/lm32-rtems5/mmultiply-enabled/newlib/targ-include
-isystem /home/joel/test-gcc/gcc/newlib/libc/include
-B/home/joel/test-gcc/install-master/lm32-rtems5/bin/
-B/home/joel/test-gcc/install-master/lm32-rtems5/lib/ -isystem
/home/joel/test-gcc/install-master/lm32-rtems5/include -isystem
/home/joel/test-gcc/install-master/lm32-rtems5/sys-include -mmultiply-enabled
-DPACKAGE_NAME=\"newlib\" -DPACKAGE_TARNAME=\"newlib\"
-DPACKAGE_VERSION=\"2.5.0\" -DPACKAGE_STRING=\"newlib\ 2.5.0\"
-DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -I.
-I../../../../../../gcc/newlib/libm/math
-I../../../../../../gcc/newlib/libm/math/../common -D_COMPILING_NEWLIB
-DCLOCK_PROVIDED -DMALLOC_PROVIDED -DEXIT_PROVIDED -DSIGNAL_PROVIDED
-DREENTRANT_SYSCALLS_PROVIDED -DHAVE_NANOSLEEP -DHAVE_BLKSIZE -DHAVE_FCNTL
-DHAVE_ASSERT_FUNC -D_NO_GETLOGIN -D_NO_GETPWENT -D_NO_GETUT -D_NO_GETPASS
-D_NO_SIGSET -D_NO_WORDEXP -D_NO_POPEN -D_NO_POSIX_SPAWN -fno-builtin -g
-O2 -mmultiply-enabled -c -o lib_a-e_j0.o `test -f 'e_j0.c' || echo
'../../../../../../gcc/newlib/libm/math/'`e_j0.c
during RTL pass: reload
../../../../../../gcc/newlib/libm/math/e_j0.c: In function 'pzero':
../../../../../../gcc/newlib/libm/math/e_j0.c:349:1: internal compiler error:
in require, at machmode.h:282
}
^
0x59f48b opt_mode<machine_mode>::require() const
../../gcc/gcc/machmode.h:282
0x59f48b replace_reg_with_saved_mem
../../gcc/gcc/caller-save.c:1151
0x59ffb6 mark_referenced_regs
../../gcc/gcc/caller-save.c:1073
0x59ffb6 mark_referenced_regs
../../gcc/gcc/caller-save.c:1073
0x59ffb6 mark_referenced_regs
../../gcc/gcc/caller-save.c:1073
0x59ffb6 mark_referenced_regs
../../gcc/gcc/caller-save.c:1073
0x5a1065 save_call_clobbered_regs()
../../gcc/gcc/caller-save.c:895
0x9b5498 reload(rtx_insn*, int)
../../gcc/gcc/reload1.c:980
0x853a3e do_reload
../../gcc/gcc/ira.c:5458
0x853a3e execute
../../gcc/gcc/ira.c:5630
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-582534-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:41:54 2017
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From: "joel at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/81804] m32c ICE during configure at leaf_function_p, at final.c:4317
Date: Tue, 21 Nov 2017 15:41:00 -0000
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--- Comment #1 from Joel Sherrill <joel at gcc dot gnu.org> ---
Version: (GCC) 8.0.0 20171120
target: m32c-rtems, likely for m32c-elf
Still happens. line number has moved in the source file but ICE is still the
same.
>From gcc-bugs-return-582535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:44:15 2017
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Subject: [Bug middle-end/83004] [8 regression] gcc.dg/vect/pr81136.c fail
Date: Tue, 21 Nov 2017 15:44:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think this test fails with -mavx and later since it has been introduced.
The test uses the VECTOR_BITS macro and assumes that is the vector size, but
tree-vect.h hardcodes VECTOR_BITS to 128 on all targets and all ISAs.
Strangely, various tests test for VECTOR_BITS > 128, > 256 etc.
So, shall we define VECTOR_BITS to higher values based on preprocessor macros?
For x86, the question then would be if __AVX__ without __AVX2__ should enable
VECTOR_BITS 256 or not, floating point vectors are 256-bit, but integral
128-bit.
Also, -mprefer-avx{128,256} change this stuff.
Or shall we have VECTOR_BITS as usual vector bits and MAX_VECTOR_BITS as
maximum for the current option?
Or shall the test use its own macro, defined by default to VECTOR_BITS but for
some ISAs to something different?
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Subject: [Bug c/83056] GCC suggests the use of previously reported undeclared identifiers when reporting new undeclared identifiers
Date: Tue, 21 Nov 2017 15:45:00 -0000
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--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch:
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01907.html
>From gcc-bugs-return-582536-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:45:36 2017
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Subject: [Bug testsuite/82997] [8 regression] gcc.dg/cpp/sysmac1.c and gcc.dg/cpp/macsyntx.c fail starting with r254707
Date: Tue, 21 Nov 2017 15:45:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed now.
>From gcc-bugs-return-582538-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:47:11 2017
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Subject: [Bug debug/82933] [8 Regression] valgrind error in set_cur_line_info_table with -g
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/82878] [7 Regression] ICE in assign_temp, at function.c:968 when using optimization
Date: Tue, 21 Nov 2017 15:47:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8 Regression] ICE in |[7 Regression] ICE in
|assign_temp, at |assign_temp, at
|function.c:968 when using |function.c:968 when using
|optimization |optimization
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Subject: [Bug middle-end/82987] [8 regression] gcc.dg/vect/slp-perm-9.c fail
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Dup of PR82847?
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/82847] [8 regression] gcc.dg/vect/slp-perm-9.c fail
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--- Comment #2 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
*** Bug 82987 has been marked as a duplicate of this bug. ***
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Subject: [Bug middle-end/82987] [8 regression] gcc.dg/vect/slp-perm-9.c fail
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Andrey Guskov <andrey.y.guskov at intel dot com> changed:
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--- Comment #2 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Damn it. Sorry.
*** This bug has been marked as a duplicate of bug 82847 ***
>From gcc-bugs-return-582545-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:58:23 2017
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Subject: [Bug tree-optimization/83080] [8 Regression] ICE at -Os and above with -Wall on C++ code: Segmentation fault
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Duplicate of pr83044.
*** This bug has been marked as a duplicate of bug 83044 ***
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Subject: [Bug tree-optimization/83044] [8 Regression] ice in contains_struct_check
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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CC| |su at cs dot ucdavis.edu
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 83080 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-582543-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 15:58:01 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/82293] [8 Regression] ICE in nonlambda_method_basetype at gcc/cp/lambda.c:886
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
On it.
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Subject: [Bug gcov-profile/82633] Document GCOV and function removal (-fkeep-inline-functions, -fkeep-static-functions)
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--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Nov 21 16:01:16 2017
New Revision: 255010
URL: https://gcc.gnu.org/viewcvs?rev=255010&root=gcc&view=rev
Log:
Backport r254257
2017-11-21 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-10-31 Martin Liska <mliska@suse.cz>
PR gcov-profile/82633
* doc/gcov.texi: Document -fkeep-{static,inline}-functions and
their interaction with GCOV infrastructure.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/doc/gcov.texi
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Subject: [Bug sanitizer/82545] [7 Regression] -O2: ICE in gimple_split_edge, at tree-cfg.c:2838, during GIMPLE pass sanopt
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--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Nov 21 16:00:26 2017
New Revision: 255008
URL: https://gcc.gnu.org/viewcvs?rev=255008&root=gcc&view=rev
Log:
Backport r253845
2017-11-21 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-10-18 Martin Liska <mliska@suse.cz>
PR sanitizer/82545
* asan.c (asan_expand_poison_ifn): Do not put gimple stmt
on an abnormal edge.
2017-11-21 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-10-18 Martin Liska <mliska@suse.cz>
PR sanitizer/82545
* gcc.dg/asan/pr82545.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/asan/pr82545.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/asan.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug driver/81829] [7 Regression] /usr/bin/gcc-{ar,nm,ranlib} segfault without arguments
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81829
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Nov 21 16:00:55 2017
New Revision: 255009
URL: https://gcc.gnu.org/viewcvs?rev=255009&root=gcc&view=rev
Log:
Backport r253886
2017-11-21 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-10-19 Martin Liska <mliska@suse.cz>
PR driver/81829
* file-find.c (remove_prefix): Remove.
* file-find.h (remove_prefix): Likewise.
* gcc-ar.c: Remove smartness of lookup.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/file-find.c
branches/gcc-7-branch/gcc/file-find.h
branches/gcc-7-branch/gcc/gcc-ar.c
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Subject: [Bug sanitizer/82792] Fallthrough attribute ignored after label, and before with address sanitizer
Date: Tue, 21 Nov 2017 16:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82792
--- Comment #17 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Nov 21 16:01:43 2017
New Revision: 255011
URL: https://gcc.gnu.org/viewcvs?rev=255011&root=gcc&view=rev
Log:
Backport r254519
2017-11-21 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-11-08 Martin Liska <mliska@suse.cz>
PR sanitizer/82792
* gimplify.c (expand_FALLTHROUGH_r): Skip IFN_ASAN_MARK.
2017-11-21 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-11-08 Martin Liska <mliska@suse.cz>
PR sanitizer/82792
* g++.dg/asan/pr82792.C: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/g++.dg/asan/pr82792.C
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/gimplify.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/82042] signed integer overflow in ao_ref_init_from_ptr_and_size
Date: Tue, 21 Nov 2017 16:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82042
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Nov 21 16:02:35 2017
New Revision: 255013
URL: https://gcc.gnu.org/viewcvs?rev=255013&root=gcc&view=rev
Log:
Backport r255001
2017-11-21 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-11-21 Martin Liska <mliska@suse.cz>
PR rtl-optimization/82044
PR tree-optimization/82042
* dse.c (check_mem_read_rtx): Check for overflow.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/dse.c
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Subject: [Bug driver/81829] [7 Regression] /usr/bin/gcc-{ar,nm,ranlib} segfault without arguments
Date: Tue, 21 Nov 2017 16:03:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug rtl-optimization/82044] runtime signed integer overflow in check_mem_read_rtx() and all_positions_needed_p() in dse.c
Date: Tue, 21 Nov 2017 16:03:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Nov 21 16:02:35 2017
New Revision: 255013
URL: https://gcc.gnu.org/viewcvs?rev=255013&root=gcc&view=rev
Log:
Backport r255001
2017-11-21 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-11-21 Martin Liska <mliska@suse.cz>
PR rtl-optimization/82044
PR tree-optimization/82042
* dse.c (check_mem_read_rtx): Check for overflow.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/dse.c
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Subject: [Bug sanitizer/82792] Fallthrough attribute ignored after label, and before with address sanitizer
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #18 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/82545] [7 Regression] -O2: ICE in gimple_split_edge, at tree-cfg.c:2838, during GIMPLE pass sanopt
Date: Tue, 21 Nov 2017 16:05:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #14 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
Date: Tue, 21 Nov 2017 16:14:00 -0000
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seurer at gcc dot gnu.org changed:
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--- Comment #1 from seurer at gcc dot gnu.org ---
Also saw this on powerpc64
>From gcc-bugs-return-582557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 16:25:47 2017
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83060] ICE on valid C++ code: in ignore_overflows, at cp/cvt.c:583
Date: Tue, 21 Nov 2017 16:25:00 -0000
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--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I'd say for C it's valid to reject &a.s[-1] and &a.s[__PTRDIFF_MAX__] in
static initializers, because there is no guarantee that such addresses are
valid values of the pointer type (only pointers to actual array elements
or just-past-end-of-array are necessarily valid). I don't think it's
required to reject such initializers, however. Of course when not in a
static initializer, such expressions must be accepted, while causing
undefined behavior at runtime if executed.
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Subject: [Bug target/83084] [7/8 Regression] -fcompare-debug failure on ppc64le
Date: Tue, 21 Nov 2017 16:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83084
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Is this because the var_location contains an unspec_volatile? Is that a
target bug, then?
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From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/83091] New: ICE with -g in arm-eabi compilation
Date: Tue, 21 Nov 2017 16:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83091
Bug ID: 83091
Summary: ICE with -g in arm-eabi compilation
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: simon at pushface dot org
Target Milestone: ---
Host: x86_64-apple-darwin15
Target: arm-eabi
Created attachment 42671
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42671&action=edit
Demonstrator
This build (with -g) fails. No problem without -g.
$ arm-eabi-gnatmake --RTS=. -c -u -f stm32-timers.adb -cargs -mlittle-endian
-mhard-float -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mthumb -g
arm-eabi-gcc -c --RTS=. -mlittle-endian -mhard-float -mcpu=cortex-m4
-mfpu=fpv4-sp-d16 -mthumb -g stm32-timers.adb
stm32-timers.adb:1538:1: error: type variant differs by TYPE_MODE.
<record_type 0x1460e53f0 stm32__timers__timx_ccer___XP4 packed type_1 HI
size <integer_cst 0x144811000 type <integer_type 0x14480d0a8 bitsizetype>
constant visited 16>
unit-size <integer_cst 0x144811018 type <integer_type 0x14480d000 sizetype>
constant visited 2>
align:16 warn_if_not_align:0 symtab:0 alias-set 23 canonical-type
0x1460e53f0
fields <field_decl 0x1460e44c0 OBJECT
type <integer_type 0x1460e52a0 stm32__timers__timx_ccer___XP4 type
<integer_type 0x1460e5348 system__unsigned_types__short_unsigned>
sizes-gimplified asm_written public visited unsigned type_0 type_5
HI size <integer_cst 0x144811000 16> unit-size <integer_cst 0x144811018 2>
align:16 warn_if_not_align:0 symtab:0 alias-set 23 canonical-type
0x1460e52a0 precision:16 min <integer_cst 0x1460e0078 0> max <integer_cst
0x1460b7de0 65535> context <translation_unit_decl 0x144920000 stm32-timers.adb>
actual bounds <tree_list 0x1460e2410 value <enumeral_type
0x1460a79d8 stm32__timers__timer_channel>> RM size <integer_cst 0x144811000 16>
RM min <integer_cst 0x1460e00a8 0> RM max <integer_cst 0x1460e0090 65535>
chain <type_decl 0x1460e4428 stm32__timers__timx_ccer___XP4>>
unsigned packed nonaddressable HI stm32-timers.ads:1390:9 size
<integer_cst 0x144811000 16> unit-size <integer_cst 0x144811018 2>
align:16 warn_if_not_align:0 offset_align 64
offset <integer_cst 0x144801e28 constant visited 0>
bit-offset <integer_cst 0x144801e88 constant 0> bit_field_type
<integer_type 0x1460e52a0 stm32__timers__timx_ccer___XP4> context <record_type
0x1460e53f0 stm32__timers__timx_ccer___XP4>> context <translation_unit_decl
0x144920000 stm32-timers.adb> Ada size <integer_cst 0x144811000 16>
chain <type_decl 0x1460e4558 stm32__timers__timx_ccer___XP4___JM>>
<record_type 0x1460e5498 stm32__timers__timx_ccer___XP4 atomic
sizes-gimplified volatile visited packed type_1 type_2 BLK
size <integer_cst 0x144811000 type <integer_type 0x14480d0a8 bitsizetype>
constant visited 16>
unit-size <integer_cst 0x144811018 type <integer_type 0x14480d000 sizetype>
constant visited 2>
align:16 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x1460e5498
fields <field_decl 0x1460e44c0 OBJECT
type <integer_type 0x1460e52a0 stm32__timers__timx_ccer___XP4 type
<integer_type 0x1460e5348 system__unsigned_types__short_unsigned>
sizes-gimplified asm_written public visited unsigned type_0 type_5
HI size <integer_cst 0x144811000 16> unit-size <integer_cst 0x144811018 2>
align:16 warn_if_not_align:0 symtab:0 alias-set 23 canonical-type
0x1460e52a0 precision:16 min <integer_cst 0x1460e0078 0> max <integer_cst
0x1460b7de0 65535> context <translation_unit_decl 0x144920000 stm32-timers.adb>
actual bounds <tree_list 0x1460e2410 value <enumeral_type
0x1460a79d8 stm32__timers__timer_channel>> RM size <integer_cst 0x144811000 16>
RM min <integer_cst 0x1460e00a8 0> RM max <integer_cst 0x1460e0090 65535>
chain <type_decl 0x1460e4428 stm32__timers__timx_ccer___XP4>>
unsigned packed nonaddressable HI stm32-timers.ads:1390:9 size
<integer_cst 0x144811000 16> unit-size <integer_cst 0x144811018 2>
align:16 warn_if_not_align:0 offset_align 64
offset <integer_cst 0x144801e28 constant visited 0>
bit-offset <integer_cst 0x144801e88 constant 0> bit_field_type
<integer_type 0x1460e52a0 stm32__timers__timx_ccer___XP4> context <record_type
0x1460e53f0 stm32__timers__timx_ccer___XP4>> context <translation_unit_decl
0x144920000 stm32-timers.adb> Ada size <integer_cst 0x144811000 16>
pointer_to_this <pointer_type 0x14614a540> chain <type_decl 0x1460e45f0
stm32__timers__timx_ccer___XP4>>
+===========================GNAT BUG DETECTED==============================+
| 8.0.0 20171102 (experimental) (arm-eabi) verify_type failed |
| Error detected around stm32-timers.adb:1538:1 |
| Please submit a bug report; see https://gcc.gnu.org/bugs/ . |
| Use a subject line meaningful to you and us to track the bug. |
| Include the entire contents of this bug box in the report. |
| Include the exact command that you entered. |
| Also include sources listed below. |
+==========================================================================+
Please include these source files with error report
Note that list may not be accurate in some cases,
so please double check that the problem can still
be reproduced with the set of files listed.
Consider also -gnatd.n switch (see debug.adb).
system.ads
stm32-timers.adb
stm32-timers.ads
stm32.ads
interfac.ads
hal.ads
stm32_svd.ads
s-unstyp.ads
a-except.ads
ada.ads
raised TYPES.UNRECOVERABLE_ERROR : comperr.adb:407
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Subject: [Bug target/83084] [7/8 Regression] -fcompare-debug failure on ppc64le
Date: Tue, 21 Nov 2017 16:34:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ah, that might be it. I'd say UNSPEC_VOLATILE should never appear in
DEBUG_INSNs. I'll have a look where it is introduced and why.
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Subject: [Bug middle-end/82878] [7 Regression] ICE in assign_temp, at function.c:968 when using optimization
Date: Tue, 21 Nov 2017 16:36:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed r254958.
>From gcc-bugs-return-582561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 16:52:54 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82336] [6/7/8 Regression] GCC requires but does not emit defaulted constructors in certain cases
Date: Tue, 21 Nov 2017 16:52:00 -0000
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Mukesh Kapoor <mukesh.kapoor at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mukesh.kapoor at oracle dot com
--- Comment #2 from Mukesh Kapoor <mukesh.kapoor at oracle dot com> ---
The compiler fails to generate the constructor bar::bar().
If you change the line
void qux(baz = {}){}
to
void qux(baz = (baz){}){}
it works fine.
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Subject: [Bug tree-optimization/80776] -Wformat-overflow false positive for %d on integer bounded by __builtin_unreachable
Date: Tue, 21 Nov 2017 16:57:00 -0000
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Joseph S. Myers <jsm28 at gcc dot gnu.org> changed:
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--- Comment #2 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
The following, reduced from an unsuccessful attempt to avoid a spurious
-Wformat-overflow warning in glibc, produces a spurious warning with current
GCC and looks like the same bug or something very similar.
char buf[15];
void
f (int a, int b, int c, int d, int e, int f)
{
if (a < -999 || a > 9999
|| b < 1 || b > 12
|| c < 1 || c > 31
|| d < 0 || d > 23
|| e < 0 || e > 59
|| f < 0 || f > 60)
__builtin_unreachable ();
__builtin_sprintf (buf, "%04d%02d%02d%02d%02d%02d", a, b, c, d, e, f);
}
u.c: In function 'f':
u.c:13:44: warning: '%02d' directive writing between 2 and 10 bytes into a
region of size 5 [-Wformat-overflow=]
__builtin_sprintf (buf, "%04d%02d%02d%02d%02d%02d", a, b, c, d, e, f);
^~~~
u.c:13:27: note: directive argument in the range [0, 2147483647]
__builtin_sprintf (buf, "%04d%02d%02d%02d%02d%02d", a, b, c, d, e, f);
^~~~~~~~~~~~~~~~~~~~~~~~~~
u.c:13:27: note: directive argument in the range [0, 2147483647]
u.c:13:3: note: '__builtin_sprintf' output between 15 and 31 bytes into a
destination of size 15
__builtin_sprintf (buf, "%04d%02d%02d%02d%02d%02d", a, b, c, d, e, f);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Subject: [Bug middle-end/82875] [8 Regression] ICE at -Os on valid code on x86_64-linux-gnu: in find_widening_optab_handler_and_mode, at optabs-query.c:414
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42672
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42672&action=edit
gcc8-pr82875.patch
Untested fix.
>From gcc-bugs-return-582564-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 16:58:45 2017
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From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/83091] ICE with -g in arm-eabi compilation
Date: Tue, 21 Nov 2017 16:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83091
--- Comment #1 from simon at pushface dot org ---
Without -g, in a different file, I got an ICE that may be related: will raise a
new bug if needed.
+===========================GNAT BUG DETECTED==============================+
| 8.0.0 20171102 (experimental) (arm-eabi) GCC error: |
| in find_widening_optab_handler_and_mode, at optabs-query.c:414 |
| Error detected around
/Users/simon/adacore/Ada_Drivers_Library/arch/ARM/STM32/drivers/stm32-rtc.adb:178:4|
| Please submit a bug report; see https://gcc.gnu.org/bugs/ . |
| Use a subject line meaningful to you and us to track the bug. |
| Include the entire contents of this bug box in the report. |
| Include the exact command that you entered. |
| Also include sources listed below. |
+==========================================================================+
Please include these source files with error report
Note that list may not be accurate in some cases,
so please double check that the problem can still
be reproduced with the set of files listed.
Consider also -gnatd.n switch (see debug.adb).
/Users/simon/cortex-gnat-rts/stm32f4/../common/system.ads
/Users/simon/adacore/Ada_Drivers_Library/arch/ARM/STM32/drivers/stm32-rtc.adb
/Users/simon/adacore/Ada_Drivers_Library/arch/ARM/STM32/drivers/stm32-rtc.ads
/Users/simon/adacore/Ada_Drivers_Library/arch/ARM/STM32/drivers/stm32.ads
/Users/simon/cortex-gnat-rts/stm32f4/../common/interfac.ads
/Users/simon/adacore/Ada_Drivers_Library/hal/src/hal.ads
/Users/simon/adacore/Ada_Drivers_Library/hal/src/hal-real_time_clock.ads
/Users/simon/adacore/Ada_Drivers_Library/arch/ARM/STM32/svd/stm32f40x/stm32_svd.ads
/Users/simon/adacore/Ada_Drivers_Library/arch/ARM/STM32/svd/stm32f40x/stm32_svd-rtc.ads
/Users/simon/adacore/Ada_Drivers_Library/arch/ARM/STM32/svd/stm32f40x/stm32_svd-rcc.ads
/Users/simon/adacore/Ada_Drivers_Library/arch/ARM/STM32/drivers/stm32-power_control.ads
/Users/simon/cortex-gnat-rts/stm32f4/../common/s-unstyp.ads
/Users/simon/cortex-gnat-rts/stm32f4/../common/a-tags.ads
/Users/simon/cortex-gnat-rts/stm32f4/../common/ada.ads
/Users/simon/cortex-gnat-rts/stm32f4/../common/s-stoele.ads
/Users/simon/cortex-gnat-rts/stm32f4/../common/a-stream.ads
/Users/simon/cortex-gnat-rts/stm32f4/../common/s-secsta.ads
/Users/simon/cortex-gnat-rts/stm32f4/../common/s-parame.ads
/Users/simon/cortex-gnat-rts/stm32f4/../common/a-except.ads
raised TYPES.UNRECOVERABLE_ERROR : comperr.adb:407
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Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
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--- Comment #17 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to neil.n.carlson from comment #16)
> I've confirmed Dominique's findings: Code in comments 0, 5, 11 are working
> now with Paul's commit (Thanks!), but comment 12 code still gives an ICE.
>
> Should I create a new PR for that example, or is it fine leaving this PR
> open?
Leave it open, thanks. Dominique, reminded me of the comment.
Paul
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Subject: [Bug debug/83084] [7/8 Regression] -fcompare-debug failure on ppc64le
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42673
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42673&action=edit
gcc8-pr83084.patch
Untested fix.
>From gcc-bugs-return-582567-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 17:38:28 2017
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Subject: [Bug ada/83027] program hangs when Ada.Text_IO is with'ed both in executable and shared library
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--- Comment #22 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Adding binder flag -F solves the problem in the attached examples
> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42630 and
> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42666 but not in my real code:
>
> https://github.com/vporton/spawn-manager
My gut feeling is that it's a different issue.
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Subject: [Bug c++/83045] [8 Regression] -Wreturn-type regression in C++
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 21 17:40:34 2017
New Revision: 255018
URL: https://gcc.gnu.org/viewcvs?rev=255018&root=gcc&view=rev
Log:
PR c++/83045
* tree-cfg.c (pass_warn_function_return::execute): Formatting fix.
Also warn if seen __builtin_unreachable () call with BUILTINS_LOCATION.
Use LOCATION_LOCUS when comparing against UNKNOWN_LOCATION.
* c-c++-common/pr61405.c (fn0, fn1): Add return stmts.
* c-c++-common/Wlogical-op-2.c (fn): Likewise.
* g++.dg/debug/pr53466.C: Add -Wno-return-type to dg-options.
* g++.dg/opt/combine.C: Likewise.
* g++.dg/ubsan/return-3.C: Likewise.
* g++.dg/pr59445.C: Likewise.
* g++.dg/pr49847.C: Likewise.
* g++.dg/ipa/pr61800.C: Likewise.
* g++.dg/ipa/pr63470.C: Likewise.
* g++.dg/ipa/pr68672-1.C: Likewise.
* g++.dg/pr58438.C: Likewise.
* g++.dg/torture/pr59265.C: Likewise.
* g++.dg/tree-ssa/ssa-dse-2.C: Likewise.
* g++.old-deja/g++.eh/catch13.C: Likewise.
* g++.old-deja/g++.eh/crash1.C: Likewise.
* g++.dg/tm/pr60004.C: Expect -Wreturn-type warning.
* g++.dg/torture/pr55740.C: Likewise.
* g++.dg/torture/pr43257.C: Likewise.
* g++.dg/torture/pr64280.C: Likewise.
* g++.dg/torture/pr54684.C: Likewise.
* g++.dg/torture/pr56694.C: Likewise.
* g++.dg/torture/pr68470.C: Likewise.
* g++.dg/torture/pr60648.C: Likewise.
* g++.dg/torture/pr71281.C: Likewise.
* g++.dg/torture/pr52772.C: Add -Wno-return-type dg-additional-options.
* g++.dg/torture/pr64669.C: Likewise.
* g++.dg/torture/pr58369.C: Likewise.
* g++.dg/torture/pr33627.C: Likewise.
* g++.dg/torture/predcom-1.C: Add
#pragma GCC diagnostic ignored "-Wreturn-type".
* g++.dg/lto/20090221_0.C: Likewise.
* g++.dg/lto/20091026-1_1.C: Likewise.
* g++.dg/lto/pr54625-1_1.C: Likewise.
* g++.dg/warn/pr83045.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/warn/pr83045.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/Wlogical-op-2.c
trunk/gcc/testsuite/c-c++-common/pr61405.c
trunk/gcc/testsuite/g++.dg/debug/pr53466.C
trunk/gcc/testsuite/g++.dg/ipa/pr61800.C
trunk/gcc/testsuite/g++.dg/ipa/pr63470.C
trunk/gcc/testsuite/g++.dg/ipa/pr68672-1.C
trunk/gcc/testsuite/g++.dg/lto/20090221_0.C
trunk/gcc/testsuite/g++.dg/lto/20091026-1_1.C
trunk/gcc/testsuite/g++.dg/lto/pr54625-1_1.C
trunk/gcc/testsuite/g++.dg/opt/combine.C
trunk/gcc/testsuite/g++.dg/pr49847.C
trunk/gcc/testsuite/g++.dg/pr58438.C
trunk/gcc/testsuite/g++.dg/pr59445.C
trunk/gcc/testsuite/g++.dg/tm/pr60004.C
trunk/gcc/testsuite/g++.dg/torture/pr33627.C
trunk/gcc/testsuite/g++.dg/torture/pr43257.C
trunk/gcc/testsuite/g++.dg/torture/pr52772.C
trunk/gcc/testsuite/g++.dg/torture/pr54684.C
trunk/gcc/testsuite/g++.dg/torture/pr55740.C
trunk/gcc/testsuite/g++.dg/torture/pr56694.C
trunk/gcc/testsuite/g++.dg/torture/pr58369.C
trunk/gcc/testsuite/g++.dg/torture/pr59265.C
trunk/gcc/testsuite/g++.dg/torture/pr60648.C
trunk/gcc/testsuite/g++.dg/torture/pr64280.C
trunk/gcc/testsuite/g++.dg/torture/pr64669.C
trunk/gcc/testsuite/g++.dg/torture/pr68470.C
trunk/gcc/testsuite/g++.dg/torture/pr71281.C
trunk/gcc/testsuite/g++.dg/torture/predcom-1.C
trunk/gcc/testsuite/g++.dg/tree-ssa/ssa-dse-2.C
trunk/gcc/testsuite/g++.dg/ubsan/return-3.C
trunk/gcc/testsuite/g++.old-deja/g++.eh/catch13.C
trunk/gcc/testsuite/g++.old-deja/g++.eh/crash1.C
trunk/gcc/tree-cfg.c
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From: "gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83092] New: ICE in gfc_apply_init, at fortran/expr.c:4228
Date: Tue, 21 Nov 2017 17:58:00 -0000
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Bug ID: 83092
Summary: ICE in gfc_apply_init, at fortran/expr.c:4228
Product: gcc
Version: 8.0
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Follow-up of pr78686 (where ICE is gone since about a month ago) :
$ cat z1.f90
program p
type t
integer :: n = 0
end type
type t2
character :: c = t()
end type
end
$ gfortran-8-20171119 -c z1.f90
f951: internal compiler error: in gfc_apply_init, at fortran/expr.c:4228
0x693df2 gfc_apply_init(gfc_typespec*, symbol_attribute*, gfc_expr*)
../../gcc/fortran/expr.c:4228
0x686876 build_struct
../../gcc/fortran/decl.c:1992
0x686876 variable_decl
../../gcc/fortran/decl.c:2592
0x686876 gfc_match_data_decl()
../../gcc/fortran/decl.c:5683
0x6e0c69 match_word_omp_simd
../../gcc/fortran/parse.c:93
0x6e431e match_word
../../gcc/fortran/parse.c:376
0x6e431e decode_statement
../../gcc/fortran/parse.c:376
0x6e6154 next_free
../../gcc/fortran/parse.c:1225
0x6e6154 next_statement
../../gcc/fortran/parse.c:1457
0x6e76cd parse_derived
../../gcc/fortran/parse.c:3255
0x6e76cd parse_spec
../../gcc/fortran/parse.c:3795
0x6e9f33 parse_progunit
../../gcc/fortran/parse.c:5637
0x6eb4f4 gfc_parse_file()
../../gcc/fortran/parse.c:6177
0x72ff5f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-582570-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 17:58:45 2017
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Subject: [Bug fortran/83092] ICE in gfc_apply_init, at fortran/expr.c:4228
Date: Tue, 21 Nov 2017 17:58:00 -0000
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
Alternatives :
$ cat z2.f90
program p
type t
end type
type t2
character :: c(1) = [t()]
end type
end
$ cat z3.f90
program p
type t
integer :: a = 1
character :: c = t()
end type
end
$ cat z4.f90
program p
type t
integer, allocatable :: a
character :: c = t()
end type
end
>From gcc-bugs-return-582571-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 18:01:51 2017
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Subject: [Bug middle-end/83074] Shared object built with `-pie --coverage' hangs forever
Date: Tue, 21 Nov 2017 18:01:00 -0000
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--- Comment #6 from Stefan Vargyas <stvar at yahoo dot com> ---
>
> Don't use --export-dynamic. This causes __libc_csu_{init,fini} to be shared
> between the objects instead of having a private copy in each object.
>
Thank you very much Andreas for your deep inside knowledge!
Indeed, as I'll show below, '__libc_csu_{init,fini}' are
the culprits for 'foo.so' blocking at exit after being
loaded in by 'bar':
(1) Build 'foo.so' exactly as before:
$ make allclean
$ make GCC=gcc-7.2.0 COVERAGE=yes foo.so
(2) The ELF file obtained has its dynamic symbol table
containing '__libc_csu_{init,fini}', with both symbols
having their binding set to 'STB_GLOBAL' and visibility
to 'STV_DEFAULT':
$ readelf --dyn-syms foo.so|grep -E 'libc_csu_(init|fini)'
46: 0000000000003540 137 FUNC GLOBAL DEFAULT 14 __libc_csu_init
49: 0000000000003530 2 FUNC GLOBAL DEFAULT 14 __libc_csu_fini
(3) Do some manual patching of the ELF file for to set
binding to 'STB_LOCAL' and visibility to 'STV_HIDDEN':
$ ghex2 foo.so
$ readelf --dyn-syms foo.so|grep -E 'libc_csu_(init|fini)'
46: 0000000000003540 137 FUNC LOCAL HIDDEN 14 __libc_csu_init
49: 0000000000003530 2 FUNC LOCAL HIDDEN 14 __libc_csu_fini
Note that I couldn't avoid manually patching 'foo.so'
since none of the linker options seems to be able to
help (neither `--dynamic-list' nor `--version-script').
Couldn't find help using 'objcopy' either: this tool
doesn't want to touch the dynamic symbol table at all!
(4) Now build 'bar' using the patched 'foo.so':
$ make GCC=gcc-7.2.0 COVERAGE=yes bar
(5) Both 'foo.so' and 'bar' work nicely (not hanging
anymore):
$ ./foo.so
foo.so: version: 0.1
$ ./bar
bar: foo.so: version: 0.1
Only one final remark: `-pie' without `--export-dynamic'
still causes '__libc_csu_{init,fini}' to be added to the
dynamic symbol table:
$ gcc-7.2.0 -I. -fPIC -fvisibility=hidden -c foo.c -o foo.o
$ gcc-7.2.0 -Wl,-L. -pie foo.o -o foo.so
$ readelf --dyn-syms foo.so|grep -P 'libc_csu_(init|fini)'
40: 00000000000033f0 137 FUNC GLOBAL DEFAULT 14 __libc_csu_init
42: 00000000000033e0 2 FUNC GLOBAL DEFAULT 14 __libc_csu_fini
>From gcc-bugs-return-582573-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 18:02:47 2017
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Subject: [Bug fortran/83093] ICE in fold_convert_loc, at fold-const.c:2266
Date: Tue, 21 Nov 2017 18:02:00 -0000
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
These variants are silently accepted :
$ cat z4.f90
program p
character(:), allocatable :: z
allocate (character(z) :: z)
end
$ cat z5.f90
program p
character(:), allocatable :: z
allocate (character(z(1:1)) :: z)
end
$ cat z7.f90
program p
character(:), allocatable :: z
allocate (character((.true.)) :: z)
end
$ cat z9.f90
program p
character(:), allocatable :: z
allocate (character(n) :: z)
end
$ gfortran-8-20171119 -c z4.f90
$
>From gcc-bugs-return-582572-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 18:02:17 2017
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Subject: [Bug fortran/83093] New: ICE in fold_convert_loc, at fold-const.c:2266
Date: Tue, 21 Nov 2017 18:02:00 -0000
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Bug ID: 83093
Summary: ICE in fold_convert_loc, at fold-const.c:2266
Product: gcc
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With invalid code, down to at least 4.8 :
$ cat z1.f90
program p
character(:), allocatable :: z
allocate (character(a) :: z)
end
$ cat z2.f90
program p
real :: a = 2
character(:), allocatable :: z
allocate (character(a) :: z)
end
$ cat z3.f90
program p
character(:), allocatable :: z
allocate (character((1.0)) :: z)
end
$ gfortran-8-20171119 -c z1.f90
z1.f90:3:0:
allocate (character(a) :: z)
internal compiler error: in fold_convert_loc, at fold-const.c:2266
0x9060ff fold_convert_loc(unsigned int, tree_node*, tree_node*)
../../gcc/fold-const.c:2265
0x734581 gfc_allocate_allocatable(stmtblock_t*, tree_node*, tree_node*,
tree_node*, tree_node*, tree_node*, tree_node*, tree_node*, gfc_expr*, int)
../../gcc/fortran/trans.c:800
0x7a0dbd gfc_trans_allocate(gfc_code*)
../../gcc/fortran/trans-stmt.c:6220
0x732b07 trans_code
../../gcc/fortran/trans.c:1980
0x7598cc gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6437
0x6eb720 translate_all_program_units
../../gcc/fortran/parse.c:6091
0x6eb720 gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x72ff5f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-582574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 18:05:08 2017
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Subject: [Bug fortran/83094] New: ICE in ipa_modify_formal_parameters, at ipa-param-manipulation.c:105
Date: Tue, 21 Nov 2017 18:05:00 -0000
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Bug ID: 83094
Summary: ICE in ipa_modify_formal_parameters, at
ipa-param-manipulation.c:105
Product: gcc
Version: 8.0
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With a mixture :
$ cat z1.f90
integer function f (a, b)
integer :: a, b[*]
!$omp declare simd
f = a + b
end
$ gfortran-8-20171119 -c z1.f90 -fopenmp -fcoarray=single
$
$ gfortran-8-20171119 -c z1.f90 -fopenmp -fcoarray=lib
during IPA pass: simdclone
z1.f90:5:0:
end
internal compiler error: in ipa_modify_formal_parameters, at
ipa-param-manipulation.c:105
0x11df7cd ipa_modify_formal_parameters(tree_node*, vec<ipa_parm_adjustment,
va_heap, vl_ptr>)
../../gcc/ipa-param-manipulation.c:105
0x1210857 simd_clone_adjust_argument_types
../../gcc/omp-simd-clone.c:691
0x1210e96 simd_clone_adjust
../../gcc/omp-simd-clone.c:1101
0x1214a81 expand_simd_clones
../../gcc/omp-simd-clone.c:1672
0x1214a81 ipa_omp_simd_clone
../../gcc/omp-simd-clone.c:1690
0x1214a81 execute
../../gcc/omp-simd-clone.c:1718
>From gcc-bugs-return-582575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 18:21:46 2017
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Subject: [Bug fortran/78686] ICE in gfc_apply_init, at fortran/expr.c:4124
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The ICE has been replaced with the error
Error: Derived type 't' at (1) is being used before it is defined
between revisions r253763 (2017-10-14, ICE) and r253982 (2017-10-22, error),
may be r253970 (pr82586, pr82587, and pr82589).
>From gcc-bugs-return-582577-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 18:42:46 2017
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Subject: [Bug fortran/78686] ICE in gfc_apply_init, at fortran/expr.c:4124
Date: Tue, 21 Nov 2017 18:42:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pault at gcc dot gnu.org
Assignee|kargl at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #4)
> The ICE has been replaced with the error
>
> Error: Derived type 't' at (1) is being used before it is defined
>
> between revisions r253763 (2017-10-14, ICE) and r253982 (2017-10-22, error),
> may be r253970 (pr82586, pr82587, and pr82589).
You are correct. It is the first chunk in the changes to resolve.c that did it.
I have taken this and will keep it open until I am next working on 7-branch and
will aply it there.
Thanks
Paul
>From gcc-bugs-return-582576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 18:42:34 2017
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Subject: [Bug middle-end/61118] [6/7/8 Regression] Spurious -Wclobbered warning generated by gcc 4.9.0 for pthread_cleanup_push
Date: Tue, 21 Nov 2017 18:42:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
CC| |law at redhat dot com
Summary|Spurious -Wclobbered |[6/7/8 Regression] Spurious
|warning generated by gcc |-Wclobbered warning
|4.9.0 for |generated by gcc 4.9.0 for
|pthread_cleanup_push |pthread_cleanup_push
Ever confirmed|0 |1
>From gcc-bugs-return-582578-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 18:44:26 2017
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Subject: [Bug fortran/83092] ICE in gfc_apply_init, at fortran/expr.c:4228
Date: Tue, 21 Nov 2017 18:44:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.4 up to trunk (8.0) for the first three tests, although the
error changed from
f951: internal compiler error: in build_struct, at fortran/decl.c:(1605|1606)
for 4.5 up tp 4.9 (the line numbers being for 4.9) to
f951: internal compiler error: in gfc_apply_init, at fortran/expr.c:(4227|4228)
for 5 up to trunk (the line numbers being for 8.0).
The ICE for the last test looks like a regression: 4.9 and before gives an
error
pr83092_3.f90:4.22:
character :: c = t()
1
Error: No initializer for component 'a' given in the structure constructor at
(1)!
while 5 up to trunk gives an ICE. My instrumented gfortran gives
../../work/gcc/fortran/expr.c:4241:48: runtime error: load of value 52, which
is not a valid value for type 'bool'
for all the tests and
../../work/gcc/fortran/expr.c:4246:15: runtime error: member access within null
pointer of type 'struct gfc_expr'
for the last one.
>From gcc-bugs-return-582579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 18:50:53 2017
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Subject: [Bug fortran/83094] ICE in ipa_modify_formal_parameters, at ipa-param-manipulation.c:105
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed on trunk. With 7.2.0, the ICE is
internal compiler error: in ipa_modify_formal_parameters, at ipa-prop.c:4162
>From gcc-bugs-return-582580-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 18:59:41 2017
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Subject: [Bug tree-optimization/83072] Late VRP optimization
Date: Tue, 21 Nov 2017 18:59:00 -0000
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> The issue is that when EVRP records value-ranges that only hold temporarily
> it doesn't update SSA_NAME_RANGE_INFO but only the internal lattice while
> if the range is determined at the SSA definition point it also updates
> SSA_NAME_RANGE_INFO.
Seems obvious now you've said it... And VRP1, which would have a separate
SSA_NAME, does not generally call into match-simplify yet.
I wonder if we'll take the ugly route of making the EVRP lattice global, and
having get_range_info use it if it isn't empty (or checking some flag) and fall
back to the current behavior otherwise. Seems simpler and cheaper than the
alternatives I am trying to think about.
>From gcc-bugs-return-582581-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 19:02:11 2017
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Subject: [Bug fortran/83093] ICE in fold_convert_loc, at fold-const.c:2266
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-21
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed.
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Subject: [Bug gcov-profile/82457] libgcov fork and exec hooks not always used
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--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Nov 21 19:03:11 2017
New Revision: 255028
URL: https://gcc.gnu.org/viewcvs?rev=255028&root=gcc&view=rev
Log:
Backport r254137
2017-11-21 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-10-27 Martin Liska <mliska@suse.cz>
PR gcov-profile/82457
* doc/invoke.texi: Document that one needs a non-strict ISO mode
for fork-like functions to be properly instrumented.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/doc/invoke.texi
>From gcc-bugs-return-582583-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 19:09:37 2017
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Subject: [Bug fortran/78686] ICE in gfc_apply_init, at fortran/expr.c:4124
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--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Tue Nov 21 19:09:01 2017
New Revision: 255029
URL: https://gcc.gnu.org/viewcvs?rev=255029&root=gcc&view=rev
Log:
2017-11-21 Paul Thomas <pault@gcc.gnu.org>
Backported from trunk fix for PR82586
PR fortran/78686
* resolve.c (resolve_generic_f): Check usage of derived type by
calling gfc_use_derived.
2017-11-21 Paul Thomas <pault@gcc.gnu.org>
Backported from trunk fix for PR82586
PR fortran/78686
* gfortran.dg/pr78686.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr78686.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/resolve.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/78686] ICE in gfc_apply_init, at fortran/expr.c:4124
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on 7- and 8-branches.
Closing - thanks for the report.
Paul
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/81327] cast to void* does not suppress -Wclass-memaccess
Date: Tue, 21 Nov 2017 19:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81327
--- Comment #3 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
By the way, this doesn't just block building Qt, but also using it for
development, because all uses of QVector that end up default-constructing an
element will run into this.
>From gcc-bugs-return-582586-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 19:22:47 2017
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Subject: [Bug middle-end/61118] [6/7/8 Regression] Indirect call generated for pthread_cleanup_push with constant cleanup function
Date: Tue, 21 Nov 2017 19:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61118
Florian Weimer <fw at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7/8 Regression] Spurious |[6/7/8 Regression] Indirect
|-Wclobbered warning |call generated for
|generated by gcc 4.9.0 for |pthread_cleanup_push with
|pthread_cleanup_push |constant cleanup function
--- Comment #13 from Florian Weimer <fw at gcc dot gnu.org> ---
This is not simply a spurious warning (the variables in question are only
assigned once and their address is not taken, so C semantics do not allow that
they are clobbered by setjmp+longjmp).
I compiled the reproducer with
pthread_cleanup_pop(1);
to see the cleanup action on the non-cancellation path, too. All compilation
with -fpic to avoid yet another GCC 7 weirdness (movl $cleanup_fn; %eax, call
*%rax).
GCC 4.8.5 20150623 (Red Hat 4.8.5-22) produces:
call pthread_cond_wait@PLT
movq %r14, %rdi
call __pthread_unregister_cancel@PLT
movq %rbx, %rdi
call cleanup_fn@PLT
GCC 7.2.1 20170829 (Red Hat 7.2.1-1) gives me:
movq cleanup_fn@GOTPCREL(%rip), %rax
movq %rax, 32(%rsp)
…
call pthread_cond_wait@PLT
movq %rbx, %rdi
call __pthread_unregister_cancel@PLT
movq 32(%rsp), %rax
movq 40(%rsp), %rdi
call *%rax
This is quite unsatisfying from a security hardening point of view because we
now have an unencrypted function pointer on the stack. This situation is
somewhat analogous to Windows SEH, which turned out very problematic. (The
jmp_buf on the stack isn't ideal, but at least the PC value in it is mangled.)
>From gcc-bugs-return-582587-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 19:25:38 2017
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Subject: [Bug target/18154] Inefficient max/min code for PowerPC
Date: Tue, 21 Nov 2017 19:25:00 -0000
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--- Comment #13 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Trunk now generates isel for power9.
>From gcc-bugs-return-582588-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 19:28:57 2017
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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/83095] New: [8 regression] many tests fail starting with r255001
Date: Tue, 21 Nov 2017 19:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83095
Bug ID: 83095
Summary: [8 regression] many tests fail starting with r255001
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
This is on powerpc64 BE only. I am not seeing the failures on LE.
Failing test cases (note that they are all compiled with -Os, -O2 and other -O
values work):
> FAIL: gcc.c-torture/execute/20041218-1.c -Os execution test
> FAIL: gcc.c-torture/execute/pr51877.c -Os execution test
> FAIL: gcc.dg/atomic/stdatomic-generic.c -Os execution test
> FAIL: gfortran.dg/aliasing_dummy_1.f90 -Os execution test
> FAIL: gfortran.dg/array_function_5.f90 -Os execution test
> FAIL: gfortran.dg/dependency_25.f90 -Os execution test
> FAIL: gfortran.dg/derived_constructor_comps_5.f90 -Os execution test
> FAIL: gfortran.dg/derived_constructor_comps_6.f90 -Os execution test
> FAIL: gfortran.dg/derived_init_2.f90 -Os execution test
> FAIL: gfortran.dg/dtio_7.f90 -Os execution test
> FAIL: gfortran.dg/matmul_3.f90 -Os execution test
> FAIL: gfortran.dg/mvbits_7.f90 -Os execution test
> FAIL: gfortran.dg/select_type_39.f03 -Os execution test
> FAIL: gfortran.dg/unlimited_polymorphic_1.f03 -Os execution test
I looked through a couple of them and they are failing when some value is not
what is expected and abort is called.
Looking at the first one:
seurer@makalu-lp1:~/gcc/build/gcc-test2$
/home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.c-torture/execute/20041218-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -Os -w -lm -o
./20041218-1.exe
seurer@makalu-lp1:~/gcc/build/gcc-test2$ ./20041218-1.exe
Aborted (core dumped)
seurer@makalu-lp1:~/gcc/build/gcc-test2$
/home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.c-torture/execute/20041218-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -g -Os -w -lm -o
./20041218-1.exe
seurer@makalu-lp1:~/gcc/build/gcc-test2$ gdb ./20041218-1.exe
(gdb) run
Program received signal SIGABRT, Aborted.
0x00003fffb7cd129c in .raise () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install glibc-2.17-196.el7.ppc64
(gdb) where
#0 0x00003fffb7cd129c in .raise () from /lib64/libc.so.6
#1 0x00003fffb7cd34a8 in .abort () from /lib64/libc.so.6
#2 0x0000000010000764 in check (x=<optimized out>, x@entry=0x10000a34,
y=<optimized out>, y@entry=0x10010fd8 <v.2810+8>)
at
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.c-torture/execute/20041218-1.c:51
#3 0x00000000100007e0 in bar (y=<optimized out>, x=1) at
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.c-torture/execute/20041218-1.c:72
#4 0x0000000010000520 in foo (z=<synthetic pointer>, y=1, x=<synthetic
pointer>) at
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.c-torture/execute/20041218-1.c:94
#5 main () at
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.c-torture/execute/20041218-1.c:115
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From: "physiker at toast2 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/83096] New: Bootstrap on darwin x86_64-apple-darwin15.6.0 (revision 254990) fails
Date: Tue, 21 Nov 2017 19:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83096
Bug ID: 83096
Summary: Bootstrap on darwin x86_64-apple-darwin15.6.0
(revision 254990) fails
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: physiker at toast2 dot net
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Bootstrapping gcc version 8 (revision 254990) on darwin does not work.
The bootstrap bails out at stage 1 with:
g++ -std=gnu++98 -c -g -DIN_GCC -fno-strict-aliasing -fno-exceptions
-fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wno-format -Wmissing-format-attribute -Woverloaded-virtual
-pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings
-fno-common -DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -I. -Ibuild
-I../../gcc/gcc -I../../gcc/gcc/build -I../../gcc/gcc/../include
-I../../gcc/gcc/../libcpp/include -I/sw/include \
-o build/print-rtl.o ../../gcc/gcc/print-rtl.c
clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is
deprecated
In file included from ../../gcc/gcc/print-rtl.c:29:
../../gcc/gcc/coretypes.h:73:1: warning: class 'rtx_def' was previously
declared as a struct [-Wmismatched-tags]
class rtx_def;
^
../../gcc/gcc/coretypes.h:55:8: note: previous use is here
struct rtx_def;
^
In file included from ../../gcc/gcc/print-rtl.c:29:
In file included from ../../gcc/gcc/coretypes.h:400:
../../gcc/gcc/machmode.h:313:1: warning: 'pod_mode' defined as a struct
template here but previously declared as a class template [-Wmismatched-tags]
struct pod_mode
^
../../gcc/gcc/coretypes.h:66:20: note: did you mean struct here?
template<typename> class pod_mode;
^~~~~
struct
In file included from ../../gcc/gcc/print-rtl.c:31:
In file included from ../../gcc/gcc/rtl.h:31:
In file included from ../../gcc/gcc/hash-table.h:235:
../../gcc/gcc/ggc.h:272:8: warning: struct 'rtx_def' was previously declared as
a class [-Wmismatched-tags]
inline struct rtx_def *
^
../../gcc/gcc/coretypes.h:73:7: note: previous use is here
class rtx_def;
^
In file included from ../../gcc/gcc/print-rtl.c:31:
In file included from ../../gcc/gcc/rtl.h:31:
In file included from ../../gcc/gcc/hash-table.h:235:
../../gcc/gcc/ggc.h:275:11: warning: struct 'rtx_def' was previously declared
as a class [-Wmismatched-tags]
return (struct rtx_def *) ggc_internal_alloc (s PASS_MEM_STAT);
^
../../gcc/gcc/coretypes.h:73:7: note: previous use is here
class rtx_def;
^
In file included from ../../gcc/gcc/print-rtl.c:31:
In file included from ../../gcc/gcc/rtl.h:31:
In file included from ../../gcc/gcc/hash-table.h:561:
../../gcc/gcc/mem-stats.h:126:1: warning: 'mem_usage' defined as a struct here
but previously declared as a class [-Wmismatched-tags]
struct mem_usage
^
../../gcc/gcc/hash-table.h:341:1: note: did you mean struct here?
class mem_usage;
^~~~~
struct
In file included from ../../gcc/gcc/print-rtl.c:31:
../../gcc/gcc/rtl.h:298:1: warning: 'rtx_def' defined as a struct here but
previously declared as a class [-Wmismatched-tags]
struct GTY((desc("0"), tag("0"),
^
../../gcc/gcc/coretypes.h:73:1: note: did you mean struct here?
class rtx_def;
^~~~~
struct
../../gcc/gcc/print-rtl.c:982:1: error: explicit instantiation cannot have a
storage class
DEFINE_DEBUG_VEC (rtx_def *)
^
../../gcc/gcc/vec.h:456:24: note: expanded from macro 'DEFINE_DEBUG_VEC'
template static void debug_helper (vec<T> &); \
^
../../gcc/gcc/print-rtl.c:982:1: error: explicit instantiation cannot have a
storage class
../../gcc/gcc/vec.h:457:24: note: expanded from macro 'DEFINE_DEBUG_VEC'
template static void debug_helper (vec<T, va_gc> &); \
^
../../gcc/gcc/print-rtl.c:983:1: error: explicit instantiation cannot have a
storage class
DEFINE_DEBUG_VEC (rtx_insn *)
^
../../gcc/gcc/vec.h:456:24: note: expanded from macro 'DEFINE_DEBUG_VEC'
template static void debug_helper (vec<T> &); \
^
../../gcc/gcc/print-rtl.c:983:1: error: explicit instantiation cannot have a
storage class
../../gcc/gcc/vec.h:457:24: note: expanded from macro 'DEFINE_DEBUG_VEC'
template static void debug_helper (vec<T, va_gc> &); \
^
../../gcc/gcc/print-rtl.c:984:1: error: explicit instantiation cannot have a
storage class
DEFINE_DEBUG_HASH_SET (rtx_def *)
^
../../gcc/gcc/hash-set.h:153:24: note: expanded from macro
'DEFINE_DEBUG_HASH_SET'
template static void debug_helper (hash_set<T> &); \
^
../../gcc/gcc/print-rtl.c:985:1: error: explicit instantiation cannot have a
storage class
DEFINE_DEBUG_HASH_SET (rtx_insn *)
^
../../gcc/gcc/hash-set.h:153:24: note: expanded from macro
'DEFINE_DEBUG_HASH_SET'
template static void debug_helper (hash_set<T> &); \
^
In file included from ../../gcc/gcc/print-rtl.c:54:
../../gcc/gcc/print-rtl.h:72:22: warning: private field 'm_rtx_reuse_manager'
is not used [-Wunused-private-field]
rtx_reuse_manager *m_rtx_reuse_manager;
^
7 warnings and 6 errors generated.
make[3]: *** [Makefile:2651: build/print-rtl.o] Fehler 1
make[3]: *** Es wird auf noch nicht beendete Prozesse gewartet....
rm fsf-funding.pod gcov.pod gpl.pod cpp.pod gfdl.pod gcc.pod gcov-dump.pod
gcov-tool.pod
make[3]: Verzeichnis „/Users/Peter/Devel/build-gcc/gcc“ wird verlassen
make[2]: *** [Makefile:4662: all-stage1-gcc] Fehler 2
make[2]: Verzeichnis „/Users/Peter/Devel/build-gcc“ wird verlassen
make[1]: *** [Makefile:22008: stage1-bubble] Fehler 2
make[1]: Verzeichnis „/Users/Peter/Devel/build-gcc“ wird verlassen
make: *** [Makefile:974: all] Fehler 2
g++ --version
Configured with: --prefix=/Library/Developer/CommandLineTools/usr
--with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 8.0.0 (clang-800.0.42.1)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin
>From gcc-bugs-return-582590-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 19:55:57 2017
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Subject: [Bug libfortran/83097] New: Use __BYTE_ORDER__ instead of runtime test
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Bug ID: 83097
Summary: Use __BYTE_ORDER__ instead of runtime test
Product: gcc
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We could use the __BYTE_ORDER__ macro for replacing the
big_endian global variable in libgfortran, and for
improving (and inlining) memcmp_char4 for little-endian
systems.
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Subject: [Bug tree-optimization/82847] [8 regression] gcc.dg/vect/slp-perm-9.c fail
Date: Tue, 21 Nov 2017 19:58:00 -0000
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----------------------------------------------------------------------------
CC| |rsandifo at gcc dot gnu.org
--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Isn't the problem here that vect_perm_byte and vect_perm_short don't return
true for x86_64, even though the patterns seem to be there in sse.md?
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Subject: [Bug tree-optimization/82945] add warning for passing non-strings to functions that expect string arguments
Date: Tue, 21 Nov 2017 20:02:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Nov 21 20:01:58 2017
New Revision: 255031
URL: https://gcc.gnu.org/viewcvs?rev=255031&root=gcc&view=rev
Log:
PR tree-optimization/82945 - add warning for passing non-strings to functions
that expect string arguments
gcc/ChangeLog:
PR tree-optimization/82945
* builtins.c (expand_builtin_strlen): Call maybe_warn_nonstring_arg.
* calls.h (maybe_warn_nonstring_arg): Declare new function.
* calls.c (get_attr_nonstring_decl, maybe_warn_nonstring_arg): New
functions.
(initialize_argument_information): Call maybe_warn_nonstring_arg.
* calls.h (get_attr_nonstring_decl): Declare new function.
* doc/extend.texi (attribute nonstring): Update.
* gimple-fold.c (gimple_fold_builtin_strncpy): Call
get_attr_nonstring_decl and handle it.
* tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Same. Improve
detection of nul-termination.
(strlen_to_stridx): Change to a pointer.
(handle_builtin_strlen, handle_builtin_stxncpy): Adjust.
(pass_strlen::execute): Same.
gcc/testsuite/ChangeLog:
PR tree-optimization/82945
* c-c++-common/Wstringop-truncation-2.c: New test.
* c-c++-common/Wstringop-truncation.c: Adjust.
* c-c++-common/attr-nonstring-2.c: Adjust.
* c-c++-common/attr-nonstring-3.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/Wstringop-truncation-2.c
trunk/gcc/testsuite/c-c++-common/attr-nonstring-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/calls.c
trunk/gcc/calls.h
trunk/gcc/doc/extend.texi
trunk/gcc/gimple-fold.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/Wstringop-truncation.c
trunk/gcc/testsuite/c-c++-common/attr-nonstring-2.c
trunk/gcc/tree-ssa-strlen.c
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Subject: [Bug tree-optimization/82945] add warning for passing non-strings to functions that expect string arguments
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Enhancement added in r255031.
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Subject: [Bug libfortran/83070] -Wsign-compare warning in eoshift0
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
rs and as could also be index_type.
Consider a patch pre-approved.
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Subject: [Bug middle-end/83004] [8 regression] gcc.dg/vect/pr81136.c fail
Date: Tue, 21 Nov 2017 20:10:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |rsandifo at gcc dot gnu.org
--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Created attachment 42674
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42674&action=edit
Candidate patch
Oops, that patch was supposed to leave tests testing the same thing for
VECTOR_BITS==128 as they were before. I'm testing the attached.
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Subject: [Bug middle-end/83004] [8 regression] gcc.dg/vect/pr81136.c fail
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--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> I think this test fails with -mavx and later since it has been introduced.
> The test uses the VECTOR_BITS macro and assumes that is the vector size, but
> tree-vect.h hardcodes VECTOR_BITS to 128 on all targets and all ISAs.
> Strangely, various tests test for VECTOR_BITS > 128, > 256 etc.
Yeah, this is used by SVE, when testing with -msve-vector-bits=256, 512, etc.
> So, shall we define VECTOR_BITS to higher values based on preprocessor
> macros?
> For x86, the question then would be if __AVX__ without __AVX2__ should enable
> VECTOR_BITS 256 or not, floating point vectors are 256-bit, but integral
> 128-bit.
> Also, -mprefer-avx{128,256} change this stuff.
> Or shall we have VECTOR_BITS as usual vector bits and MAX_VECTOR_BITS as
> maximum for the current option?
> Or shall the test use its own macro, defined by default to VECTOR_BITS but
> for some ISAs to something different?
Defining VECTOR_BITS to the maximum should work (i.e. ignoring -mprefer-*).
TBH I was surprised I was the first to hit the need for VECTOR_BITS, since I'd
have thought AVX2 and AVX512 would have had the same problems. Were the
vect.exp results clean for those architectures before r254589?
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/83098] New: [8 regression] ICE in assert_rtx_eq_at, at selftest-rtl.c:57
Date: Tue, 21 Nov 2017 20:23:00 -0000
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Bug ID: 83098
Summary: [8 regression] ICE in assert_rtx_eq_at, at
selftest-rtl.c:57
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Target Milestone: ---
Target: i386-pc-solaris2.11, i686-pc-linux-gnu
Between 20171120 (r254958) and 20171121 (r255019) bootstrap broke on 32-bit
Solaris/x86 and
32-bit Linux/x86 in stage2:
/var/gcc/regression/trunk/4.10.10-gcc-gas-gld-32/build/./gcc/xgcc
-B/var/gcc/regression/trunk/4.10.10-gcc-gas-gld-32/build/./gcc/ -xc -nostdinc
/dev/null -S -o /dev/null
-fself-test=/vol/gcc/src/hg/trunk/local/gcc/testsuite/selftests
/vol/gcc/src/hg/trunk/local/gcc/simplify-rtx.c:6622: test_vector_ops_series:
FAIL: ASSERT_RTX_EQ (series_0_r, simplify_unary_operation (NEG, mode,
series_0_nr, mode))
expected: (vec_series:V4QI (const_int 0 [0])
(reg:QI 88))
actual: (vec_series:V4QI (const_int 51 [0x33])
(reg:QI 88))
cc1: internal compiler error: in assert_rtx_eq_at, at selftest-rtl.c:57
Rainer
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Subject: [Bug rtl-optimization/83098] [8 regression] ICE in assert_rtx_eq_at, at selftest-rtl.c:57
Date: Tue, 21 Nov 2017 20:23:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
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Subject: [Bug middle-end/82547] wide_int is not setting overflow properly for large unsigned add/subtract calculations.
Date: Tue, 21 Nov 2017 20:27:00 -0000
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Subject: [Bug c/83011] -Wformat-truncation=2 difficult to avoid for non-constant bounds
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--- Comment #6 from Julien ÉLIE <julien at trigofacile dot com> ---
Many thanks for your kind explanation, Martin. Perfectly understood.
>From gcc-bugs-return-582601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 20:45:45 2017
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Subject: [Bug libgomp/81386] [8 regression] libgomp.fortran/appendix-a/a.16.1.f90 fails starting with 249424
Date: Tue, 21 Nov 2017 20:45:00 -0000
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--- Comment #10 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Where does this one stand now?
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Subject: [Bug libstdc++/48101] obscure error message with std::set<const int>
Date: Tue, 21 Nov 2017 20:47:00 -0000
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Nov 21 20:47:09 2017
New Revision: 255035
URL: https://gcc.gnu.org/viewcvs?rev=255035&root=gcc&view=rev
Log:
PR libstdc++/48101 improve errors for invalid container specializations
PR libstdc++/48101
* include/bits/allocator.h (allocator<const _Tp>)
(allocator<volatile _Tp>, allocator<const volatile _Tp>): Add partial
specializations.
* include/bits/forward_list.h (forward_list): Add static assertions.
* include/bits/hashtable.h (__cache_default): Use
__is_nothrow_invocable instead of __is_noexcept_hash.
(_Hashtable): Add static assertions.
* include/bits/hashtable_policy.h (__is_noexcept_hash): Remove.
* include/bits/stl_deque.h (deque): Add static assertions.
* include/bits/stl_function.h (_Identity<const _Tp>): Add partial
specialization.
* include/bits/stl_list.h (list): Add static assertions.
* include/bits/stl_map.h (map): Likewise.
* include/bits/stl_multimap.h (multimap): Likewise.
* include/bits/stl_multiset.h (multiset): Likewise.
* include/bits/stl_set.h (set): Likewise.
* include/bits/stl_tree.h (_Rb_tree): Likewise.
* include/bits/stl_vector.h (vector): Likewise.
* include/bits/unordered_map.h (unordered_map, unordered_multimap):
Use typename instead of class in template-parameter-list and remove
spaces.
* include/bits/unordered_set.h (unordered_set, unordered_multiset):
Likewise.
* testsuite/23_containers/deque/48101-2_neg.cc: New test.
* testsuite/23_containers/deque/48101_neg.cc: New test.
* testsuite/23_containers/forward_list/48101-2_neg.cc: New test.
* testsuite/23_containers/forward_list/48101_neg.cc: New test.
* testsuite/23_containers/list/48101-2_neg.cc: New test.
* testsuite/23_containers/list/48101_neg.cc: New test.
* testsuite/23_containers/map/48101-2_neg.cc: New test.
* testsuite/23_containers/map/48101_neg.cc: New test.
* testsuite/23_containers/map/operations/31440.cc: Fix comparison
object to have const-qualified call operator.
* testsuite/23_containers/multimap/48101-2_neg.cc: New test.
* testsuite/23_containers/multimap/48101_neg.cc: New test.
* testsuite/23_containers/multiset/48101-2_neg.cc: New test.
* testsuite/23_containers/multiset/48101_neg.cc: New test.
* testsuite/23_containers/set/48101-2_neg.cc: New test.
* testsuite/23_containers/set/48101_neg.cc: New test.
* testsuite/23_containers/unordered_map/48101-2_neg.cc: New test.
* testsuite/23_containers/unordered_map/48101_neg.cc: New test.
* testsuite/23_containers/unordered_multimap/48101-2_neg.cc: New test.
* testsuite/23_containers/unordered_multimap/48101_neg.cc: New test.
* testsuite/23_containers/unordered_multiset/48101-2_neg.cc: New test.
* testsuite/23_containers/unordered_multiset/48101_neg.cc: New test.
* testsuite/23_containers/unordered_set/48101-2_neg.cc: New test.
* testsuite/23_containers/unordered_set/48101_neg.cc: New test.
* testsuite/23_containers/unordered_set/instantiation_neg.cc: Adjust
dg-error line number.
* testsuite/23_containers/vector/48101-2_neg.cc: New test.
* testsuite/23_containers/vector/48101_neg.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/23_containers/deque/48101-2_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/deque/48101_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/instantiation_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/forward_list/48101-2_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/forward_list/48101_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/instantiation_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/list/48101-2_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/list/48101_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/instantiation_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/map/48101-2_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/map/48101_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/multimap/48101-2_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/multimap/48101_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/multiset/48101-2_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/multiset/48101_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/instantiation_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/set/48101-2_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/set/48101_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/instantiation_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_map/48101-2_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_map/48101_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/instantiation_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_multimap/48101-2_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_multimap/48101_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/instantiation_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_multiset/48101-2_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_multiset/48101_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/instantiation_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/48101-2_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/48101_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/instantiation_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/vector/48101-2_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/vector/48101_neg.cc
- copied, changed from r255023,
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/instantiation_neg.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/allocator.h
trunk/libstdc++-v3/include/bits/forward_list.h
trunk/libstdc++-v3/include/bits/hashtable.h
trunk/libstdc++-v3/include/bits/hashtable_policy.h
trunk/libstdc++-v3/include/bits/stl_deque.h
trunk/libstdc++-v3/include/bits/stl_function.h
trunk/libstdc++-v3/include/bits/stl_list.h
trunk/libstdc++-v3/include/bits/stl_map.h
trunk/libstdc++-v3/include/bits/stl_multimap.h
trunk/libstdc++-v3/include/bits/stl_multiset.h
trunk/libstdc++-v3/include/bits/stl_set.h
trunk/libstdc++-v3/include/bits/stl_tree.h
trunk/libstdc++-v3/include/bits/stl_vector.h
trunk/libstdc++-v3/include/bits/unordered_map.h
trunk/libstdc++-v3/include/bits/unordered_set.h
trunk/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
trunk/libstdc++-v3/testsuite/23_containers/unordered_set/instantiation_neg.cc
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Subject: [Bug libstdc++/48101] obscure error message with std::set<const int>
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48101
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Gaby's original testcase now prints simply:
In file included from /home/jwakely/gcc/8/include/c++/8.0.0/set:61:0,
from const.cc:1:
/home/jwakely/gcc/8/include/c++/8.0.0/bits/stl_set.h: In instantiation of
‘class std::set<const int>’:
const.cc:4:23: required from here
/home/jwakely/gcc/8/include/c++/8.0.0/bits/stl_set.h:108:7: error: static
assertion failed: std::set must have a non-const, non-volatile value_type
static_assert(is_same<typename remove_cv<_Key>::type, _Key>::value,
^~~~~~~~~~~~~
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Subject: [Bug c++/81610] bogus fix-it hint for a call to an undeclared function: for
Date: Tue, 21 Nov 2017 20:55:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-21
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Subject: [Bug middle-end/82547] wide_int is not setting overflow properly for large unsigned add/subtract calculations.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82547
--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Created attachment 42675
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42675&action=edit
Candidate patch
Here's the patch I'm testing.
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Subject: [Bug libgomp/81386] [8 regression] libgomp.fortran/appendix-a/a.16.1.f90 fails starting with 249424
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seurer at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #11 from seurer at gcc dot gnu.org ---
Last failure I see in test results was on 7/17 so I am closing.
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Subject: [Bug bootstrap/83099] warn_nonstring_bound function breaks bootstrap
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
Version|unknown |8.0
Target Milestone|--- |8.0
>From gcc-bugs-return-582607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 21:34:13 2017
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Subject: [Bug bootstrap/83099] New: warn_nonstring_bound function breaks bootstrap
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83099
Bug ID: 83099
Summary: warn_nonstring_bound function breaks bootstrap
Product: gcc
Version: unknown
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Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
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Bootstrap is currently broken:
../../trunk/gcc/calls.c:1542:1: Fehler: »void warn_nonstring_bound(tree, tree)«
definiert, aber nicht verwendet [-Werror=unused-function]
r255031 could be the problem.
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Subject: [Bug tree-optimization/82945] add warning for passing non-strings to functions that expect string arguments
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Nov 21 21:44:26 2017
New Revision: 255036
URL: https://gcc.gnu.org/viewcvs?rev=255036&root=gcc&view=rev
Log:
gcc/ChangeLog:
PR tree-optimization/82945
* calls.h (warn_nonstring_bound): Remove unused function.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/calls.c
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From: "bunk at stusta dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83100] New: [8 Regression] powerpc: internal compiler error: in get_variable_section, at varasm.c:1150 with -fdata-sections
Date: Tue, 21 Nov 2017 21:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83100
Bug ID: 83100
Summary: [8 Regression] powerpc: internal compiler error: in
get_variable_section, at varasm.c:1150 with
-fdata-sections
Product: gcc
Version: 8.0
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Created attachment 42676
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42676&action=edit
preprocessed source (from nss-3.34)
$ gcc-7 -c -O1 -fdata-sections pkix_errpaths.i
$ gcc-8 -c -O1 -fdata-sections pkix_errpaths.i
pkix_errpaths.c:102:1: internal compiler error: in get_variable_section, at
varasm.c:1150
}
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-8/README.Bugs> for instructions.
$ gcc-8 --version
gcc-8 (Debian 8-20171108-1) 8.0.0 20171108 (experimental) [trunk revision
254551]
...
Works with -O0, ICE with >= -O1.
Reproduced on 64bit little endian and 32bit big endian powerpc.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/83099] warn_nonstring_bound function breaks bootstrap
Date: Tue, 21 Nov 2017 21:59:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
r255036 removes the unused warning and should unblock the bootstrap.
>From gcc-bugs-return-582612-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 22:00:40 2017
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Subject: [Bug c/83056] GCC suggests the use of previously reported undeclared identifiers when reporting new undeclared identifiers
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--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Tue Nov 21 21:59:53 2017
New Revision: 255038
URL: https://gcc.gnu.org/viewcvs?rev=255038&root=gcc&view=rev
Log:
C: don't suggest names that came from earlier failures (PR c/83056)
PR c/83056 reports an issue affecting trunk and gcc-7 in which
the C frontend's implementation of lookup_name_fuzzy uses undeclared
identifiers as suggestions when encountering subsequent undeclared
identifiers.
The fix is to filter out the names bound to error_mark_node
in lookup_name_fuzzy.
The C++ frontend is unaffected, as it already does this.
gcc/c/ChangeLog:
PR c/83056
* c-decl.c (lookup_name_fuzzy): Don't suggest names that came from
earlier failed lookups.
gcc/testsuite/ChangeLog:
PR c/83056
* gcc.dg/spellcheck-pr83056.c: New test case.
Added:
trunk/gcc/testsuite/gcc.dg/spellcheck-pr83056.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/80177] wrong fixit hint for misspelled static_assert: __cpp_static_assert
Date: Tue, 21 Nov 2017 22:04:00 -0000
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--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Note: r247233 appears to have caused PR c++81610 and PR c++/80567. So if this
is ever backported to gcc 7, we'd need the fix for those also.
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Subject: [Bug fortran/83088] [8 Regression] ICE with -init-derived
Date: Tue, 21 Nov 2017 22:06:00 -0000
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Fritz Reese <foreese at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=82972
Depends on| |82972
Assignee|unassigned at gcc dot gnu.org |foreese at gcc dot gnu.org
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82972
[Bug 82972] [8 Regression] ICE with -finit-derived in gfc_conv_structure, at
fortran/trans-expr.c:7733 (and others)
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Subject: [Bug c/83056] GCC suggests the use of previously reported undeclared identifiers when reporting new undeclared identifiers
Date: Tue, 21 Nov 2017 22:08:00 -0000
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--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Fixed on trunk for gcc 8 by r255038; not yet fixed on gcc-7-branch.
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
Date: Tue, 21 Nov 2017 22:25:00 -0000
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--- Comment #13 from Andreas Schwab <schwab@linux-m68k.org> ---
e0fbd2cc7d2a77e5d06bdb7bf92b98a03b9b09ce is the first bad commit
commit e0fbd2cc7d2a77e5d06bdb7bf92b98a03b9b09ce
Author: hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon Nov 20 09:55:02 2017 +0000
PR bootstrap/83062
* ipa-inline.c (can_inline_edge_p): Fix typo in previous patch.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@254946
138bc75d-0d04-0410-961f-82ee72b054a4
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From: "jrtc27 at jrtc27 dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/83100] [8 Regression] powerpc: internal compiler error: in get_variable_section, at varasm.c:1150 with -fdata-sections
Date: Tue, 21 Nov 2017 22:33:00 -0000
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James Clarke <jrtc27 at jrtc27 dot com> changed:
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----------------------------------------------------------------------------
CC| |jrtc27 at jrtc27 dot com
--- Comment #1 from James Clarke <jrtc27 at jrtc27 dot com> ---
This is due to the combination of `-O2`, `-fdata-sections` and constant
implicitly-zeroed global variables (I assume as a result of
https://gcc.gnu.org/ml/gcc-patches/2017-08/msg01591.html):
(experimental_powerpc-dchroot)jrtc27@partch:~$ cat pkix_errpaths.i
const int a;
(experimental_powerpc-dchroot)jrtc27@partch:~$ /usr/bin/powerpc-linux-gnu-gcc-8
-o pkix_errpaths.s -S -O2 -fdata-sections pkix_errpaths.i
pkix_errpaths.i:1:1: internal compiler error: in get_variable_section, at
varasm.c:1150
const int a;
^~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-8/README.Bugs> for instructions.
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From: "nicolas.gama at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83101] New: stod, stold was not declared
Date: Tue, 21 Nov 2017 22:37:00 -0000
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Bug ID: 83101
Summary: stod, stold was not declared
Product: gcc
Version: 5.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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in the g++-5 package in ubuntu artful (g++-5 (Ubuntu 5.5.0-1ubuntu1) 5.4.1
20171010)
the c++11 functions stod, stold are unavailable
(it seems that the macro _GLIBCXX_USE_C99 is not defined by the -std=c++11 or
-std=gnu++11 flag)
minimal example: a.cpp
-----------
#include <iostream> // std::cout
#include <string> // std::string, std::stod
int main ()
{
std::string orbits ("90613.305");
double pluto = std::stod (orbits);
return 0;
}
----------
g++-5 -std=c++11 a.cpp
-> a.cpp: In function 'int main()':
a.cpp:7:18: error: 'stod' is not a member of 'std'
double pluto = std::stod (orbits);
The problem does not appear with g++-6, g++-7.
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Subject: [Bug c++/83101] stod, stold was not declared
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Andreas Schwab <schwab@linux-m68k.org> changed:
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
gcc 5 is out of maintenance.
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Subject: [Bug target/81872] Enable __float128 by default on PowerPC Linux systems
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Michael Meissner <meissner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Michael Meissner <meissner at gcc dot gnu.org> ---
This was fixed in the September 7th, 2017 check-in that made __float128 default
on Linux 64-bit server systems that specify a minimum cpu of power7 as the
default. I.e. the little endian 64-bit systems do this automatically, the
big-endian 64-bit systems only do this if the compiler is configured using
--with-cpu=power7, --with-cpu=power8, or --with-cpu=power9.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/83102] New: go bootstrap error in ast-dump.cc due to __is_invocable failure
Date: Tue, 21 Nov 2017 23:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83102
Bug ID: 83102
Summary: go bootstrap error in ast-dump.cc due to
__is_invocable failure
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
Bootstrapping GCC 8.0 (at r255038) on x86_64 fails with the error while
compiling gcc/go/gofrontend/ast-dump.cc:
In file included from
/opt/notnfs/msebor/build/gcc-svn/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/map:60,
from /opt/notnfs/msebor/src/gcc/svn/gcc/go/go-system.h:36,
from
/opt/notnfs/msebor/src/gcc/svn/gcc/go/gofrontend/ast-dump.cc:7:
/opt/notnfs/msebor/build/gcc-svn/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_tree.h:
In instantiation of ‘class std::_Rb_tree<Import_init*, Import_init*,
std::_Identity<Import_init*>, Import_init_lt, std::allocator<Import_init*> >’:
/opt/notnfs/msebor/build/gcc-svn/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_set.h:133:17:
required from ‘class std::set<Import_init*, Import_init_lt>’
/opt/notnfs/msebor/src/gcc/svn/gcc/go/gofrontend/gogo.h:127:37: required from
here
/opt/notnfs/msebor/build/gcc-svn/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_tree.h:452:7:
error: static assertion failed: comparison object must be invocable with two
arguments of key type
static_assert(__is_invocable<const _Compare&, const _Key&, const
_Key&>{},
^~~~~~~~~~~~~
/opt/notnfs/msebor/src/gcc/svn/gcc/go/Make-lang.in:239: recipe for target
'go/ast-dump.o' failed
A test case for the error suggests the problem is either in libstdc++ or the
C++ front end:
$ cat t.C && g++ -S -Wall ... t.C
#include <set>
struct Import_init { int init_name () const; };
struct Import_init_lt {
bool operator()(const Import_init* i1, const Import_init* i2)
{
return i1->init_name() < i2->init_name();
}
};
class Import_init_set : public std::set<Import_init*, Import_init_lt> { };
In file included from
/opt/notnfs/msebor/build/gcc-svn/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/set:60,
from t.C:1:
/opt/notnfs/msebor/build/gcc-svn/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_tree.h:
In instantiation of ‘class std::_Rb_tree<Import_init*, Import_init*,
std::_Identity<Import_init*>, Import_init_lt, std::allocator<Import_init*> >’:
/opt/notnfs/msebor/build/gcc-svn/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_set.h:133:17:
required from ‘class std::set<Import_init*, Import_init_lt>’
t.C:13:37: required from here
/opt/notnfs/msebor/build/gcc-svn/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_tree.h:452:7:
error: static assertion failed: comparison object must be invocable with two
arguments of key type
static_assert(__is_invocable<const _Compare&, const _Key&, const
_Key&>{},
^~~~~~~~~~~~~
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/65157] Unable to define a static template member function of a nested class as a friend of a sibling class.
Date: Tue, 21 Nov 2017 23:05:00 -0000
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Richard Smith <richard-gccbugzilla at metafoo dot co.uk> changed:
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--- Comment #2 from Richard Smith <richard-gccbugzilla at metafoo dot co.uk> ---
Clang is wrong; lookup for B::Create should fail because B is a dependent type,
which is what happens in GCC and EDG. Adding this before 'main' crashes Clang:
template<> class A<int>::B {};
A<int>::C<int> c;
(Internally, Clang is marking the friend declaration as invalid, but failing to
actually produce a corresponding diagnostic.)
Filed as bugs.llvm.org/PR35377.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/83102] go bootstrap error in ast-dump.cc due to __is_invocable failure
Date: Tue, 21 Nov 2017 23:06:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #0)
> struct Import_init_lt {
> bool operator()(const Import_init* i1, const Import_init* i2)
This function needs to be const
> {
> return i1->init_name() < i2->init_name();
> }
> };
>From gcc-bugs-return-582624-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 23:07:05 2017
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Subject: [Bug c++/78724] Incorrect ambiguous reference error when template class was forward declarated as a friend
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--- Comment #1 from Richard Smith <richard-gccbugzilla at metafoo dot co.uk> ---
Probable duplicate of bug#59930 (friend class templates injected into wrong
namespace).
>From gcc-bugs-return-582625-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 23:14:39 2017
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Subject: [Bug bootstrap/83102] go bootstrap error in ast-dump.cc due to __is_invocable failure
Date: Tue, 21 Nov 2017 23:14:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Because otherwise it's impossible to use a const set:
const Import_init_set s;
auto it = s.lower_bound(0);
This fails, because the comparison object in the set is const, and so it's
operator() isn't usable. The Go code apparently never calls const member
functions on those sets.
>From gcc-bugs-return-582626-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 23:17:47 2017
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Subject: [Bug c++/64816] gcc claims that constructor is private when it should be accessible
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--- Comment #5 from Richard Smith <richard-gccbugzilla at metafoo dot co.uk> ---
Possibly a duplicate of bug#59930? (It looks like class-scope friend class
template declarations sometimes inject the class template into the wrong
namespace, specifically if the template containing the friend is instantiated
before the befriended template is declared.)
>From gcc-bugs-return-582627-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 23:18:57 2017
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Subject: [Bug bootstrap/83102] go bootstrap error in ast-dump.cc due to __is_invocable failure
Date: Tue, 21 Nov 2017 23:18:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #2)
> This fails, because the comparison object in the set is const, and so it's
s/it's/its/
The requirements in the standard were clarified by https://wg21.link/lwg2542 so
I suppose strictly-speaking we should only reject it in C++17 mode, but our
usual policy is to backport DRs to all modes where relevant (and we never
supported the example in the DR, so the static_assert is just enforcing what
was already the case in our implementation).
>From gcc-bugs-return-582628-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 23:20:30 2017
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Subject: [Bug c++/81347] g++ confused by namespaces and friend classes
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Richard Smith <richard-gccbugzilla at metafoo dot co.uk> changed:
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| |.co.uk
--- Comment #4 from Richard Smith <richard-gccbugzilla at metafoo dot co.uk> ---
Duplicate of bug#59930 (friend class templates in class templates get injected
into the global namespace instead of the innermost enclosing namespace)?
>From gcc-bugs-return-582629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 23:25:10 2017
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Subject: [Bug ada/83091] ICE with -g in arm-eabi compilation
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Small issue in gigi.
>From gcc-bugs-return-582630-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 23:25:24 2017
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Subject: [Bug ada/83091] ICE with -g in arm-eabi compilation
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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>From gcc-bugs-return-582631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 23:26:29 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83101] stod, stold was not declared
Date: Tue, 21 Nov 2017 23:26:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You should report this to Ubuntu instead.
I suspect you're using glibc 2.26 which has a bug that causes GCC to misdetect
its C99 support. Ubuntu should patch it.
>From gcc-bugs-return-582632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 23:34:02 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/83102] go bootstrap error in ast-dump.cc due to __is_invocable failure
Date: Tue, 21 Nov 2017 23:34:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
If we want to relax the check this should work:
--- a/libstdc++-v3/include/bits/stl_tree.h
+++ b/libstdc++-v3/include/bits/stl_tree.h
@@ -448,8 +448,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
typedef __gnu_cxx::__alloc_traits<_Node_allocator> _Alloc_traits;
-#if __cplusplus >= 201103L
- static_assert(__is_invocable<const _Compare&, const _Key&, const
_Key&>{},
+#if __cplusplus >= 201703L
+ // LWG DR 2542: Missing const requirements for associative containers
+ static_assert(is_invocable_v<const _Compare&, const _Key&, const _Key&>,
+ "comparison object must be invocable with two arguments of key
type");
+#elif __cplusplus >= 201103L
+ static_assert(__is_invocable<_Compare&, const _Key&, const _Key&>{},
"comparison object must be invocable with two arguments of key
type");
#endif
>From gcc-bugs-return-582633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 21 23:38:43 2017
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Subject: [Bug ada/83091] ICE with -g in arm-eabi compilation
Date: Tue, 21 Nov 2017 23:38:00 -0000
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Created attachment 42677
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42677&action=edit
Tentative fix
Please give it a try on arm-eabi.
>From gcc-bugs-return-582634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 00:09:16 2017
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From: "richard-gccbugzilla at metafoo dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/59930] template friend declarations, namespaces, and explicit instantiations don't mix
Date: Wed, 22 Nov 2017 00:09:00 -0000
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Richard Smith <richard-gccbugzilla at metafoo dot co.uk> changed:
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| |.co.uk
--- Comment #1 from Richard Smith <richard-gccbugzilla at metafoo dot co.uk> ---
Another example, without the explicit instantiation:
namespace N {
template<typename T> class A {
template<typename U> friend struct B;
private:
int n;
};
}
template<typename T> struct B {
int f(N::A<int> ai) { return ai.n; }
};
int k = B<int>().f({}); // incorrectly accepted
It looks like when GCC instantiates a friend class template declaration, it
incorrectly injects it into the global namespace (rather than the innermost
enclosing namespace) if redeclaration lookup doesn't find some prior
declaration of the class template to befriend.
That would make at least bug#64816, bug#78724, and bug#81347 duplicates of
this.
>From gcc-bugs-return-582635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 00:24:58 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83058] [6/7/8 Regression] ICE on C++ code with negative array index: in warn_placement_new_too_small, at cp/init.c:2666
Date: Wed, 22 Nov 2017 00:24:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|diagnostic |ice-on-valid-code
Status|UNCONFIRMED |ASSIGNED
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirming. It's amazing how error-prone this all is...
>From gcc-bugs-return-582636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 00:35:24 2017
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/83103] New: Improve __mulkc3 and __divkc3 on Power9
Date: Wed, 22 Nov 2017 00:35:00 -0000
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Bug ID: 83103
Summary: Improve __mulkc3 and __divkc3 on Power9
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
Reporter: meissner at gcc dot gnu.org
Target Milestone: ---
Right now, the __mulkc3 and __divkc3 functions that provide complex
multiply/divide support are built with the default cpu used for building
libgcc. We should use the target_clones attribute to compile these functions
with -mcpu=power9, so that these functions are faster when run on power9
hardware.
>From gcc-bugs-return-582637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 04:36:22 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83104] New: [8 Regression] ICE: Segmentation fault
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83104
Bug ID: 83104
Summary: [8 Regression] ICE: Segmentation fault
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
CC: law at gcc dot gnu.org
Target Milestone: ---
~ % cat fetch-value.i
int *a;
int foo() {
if (a && a - (int *)0 > 0)
return 0;
}
~ % gcc -O2 -c fetch-value.i
during GIMPLE pass: vrp
fetch-value.i: In function ‘foo’:
fetch-value.i:2:5: internal compiler error: Segmentation fault
int foo() {
^~~
0x10985953 crash_signal
../../gcc/gcc/toplev.c:325
0x1020fa7c tree_int_cst_elt_check(tree_node const*, int, char const*, int, char
const*)
../../gcc/gcc/tree.h:3277
0x1020fa7c wi::to_wide(tree_node const*)
../../gcc/gcc/tree.h:5246
0x10dabb9b vr_values::two_valued_val_range_p(tree_node*, tree_node**,
tree_node**)
../../gcc/gcc/vr-values.c:4053
0x10dac783 vr_values::simplify_stmt_using_ranges(gimple_stmt_iterator*)
../../gcc/gcc/vr-values.c:4116
0x10cefb9b vrp_folder::simplify_stmt_using_ranges(gimple_stmt_iterator*)
../../gcc/gcc/tree-vrp.c:6362
0x10cefb9b vrp_folder::fold_stmt(gimple_stmt_iterator*)
../../gcc/gcc/tree-vrp.c:6437
0x10bcc5a3
substitute_and_fold_dom_walker::before_dom_children(basic_block_def*)
../../gcc/gcc/tree-ssa-propagate.c:1073
0x1126ee9f dom_walker::walk(basic_block_def*)
../../gcc/gcc/domwalk.c:308
0x10bcb33f substitute_and_fold_engine::substitute_and_fold()
../../gcc/gcc/tree-ssa-propagate.c:1173
0x10cf00e3 vrp_prop::vrp_finalize(bool)
../../gcc/gcc/tree-vrp.c:6788
0x10d013df execute_vrp
../../gcc/gcc/tree-vrp.c:6864
>From gcc-bugs-return-582638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 05:21:32 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/82172] Destruction of basic_string in basic_stringbuf::overflow with _GLIBCXX_USE_CXX11_ABI=0, -flto, and C++17 mode results in invalid delete
Date: Wed, 22 Nov 2017 05:21:00 -0000
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--- Comment #24 from Gubbins <dave.gittins at gmail dot com> ---
> > Does anyone know how I would raise this with someone who can fix it on the
> > Darwin side? Or could it be worked around by gcc?
>
> Linker should provide precise information to GCC.
FWIW, I have raised a bug report on the Apple Developer Bug Reporter regarding
the similar behaviour of the OSX linker.
>From gcc-bugs-return-582639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 07:14:34 2017
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Subject: [Bug tree-optimization/83104] [8 Regression] ICE: Segmentation fault
Date: Wed, 22 Nov 2017 07:14:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-22
CC| |glisse at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Started with r255021 (POINTER_DIFF_EXPR).
>From gcc-bugs-return-582640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 08:00:42 2017
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Subject: [Bug tree-optimization/83104] [8 Regression] ICE: Segmentation fault
Date: Wed, 22 Nov 2017 08:00:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
two_valued_val_range_p doesn't work on pointers, it uses vrp_val_min on the
type of the arguments. Probably:
--- vr-values.c (revision 255021)
+++ vr-values.c (working copy)
@@ -4091,7 +4091,7 @@ vr_values::simplify_stmt_using_ranges (g
LHS = VAR == VAL1 ? (VAL1 BINOP CST) : (VAL2 BINOP CST) */
if (TREE_CODE_CLASS (rhs_code) == tcc_binary
- && INTEGRAL_TYPE_P (TREE_TYPE (lhs))
+ && INTEGRAL_TYPE_P (TREE_TYPE (rhs1))
&& ((TREE_CODE (rhs1) == INTEGER_CST
&& TREE_CODE (rhs2) == SSA_NAME)
|| (TREE_CODE (rhs2) == INTEGER_CST
(or keep both tests)
>From gcc-bugs-return-582641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 08:11:42 2017
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Subject: [Bug bootstrap/83102] [8 Regression] go bootstrap error in ast-dump.cc due to __is_invocable failure
Date: Wed, 22 Nov 2017 08:11:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-22
CC| |ian at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|go bootstrap error in |[8 Regression] go bootstrap
|ast-dump.cc due to |error in ast-dump.cc due to
|__is_invocable failure |__is_invocable failure
Ever confirmed|0 |1
>From gcc-bugs-return-582642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 08:31:05 2017
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Subject: [Bug tree-optimization/83072] Late VRP optimization
Date: Wed, 22 Nov 2017 08:31:00 -0000
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 21 Nov 2017, glisse at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83072
>
> --- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #2)
> > The issue is that when EVRP records value-ranges that only hold temporarily
> > it doesn't update SSA_NAME_RANGE_INFO but only the internal lattice while
> > if the range is determined at the SSA definition point it also updates
> > SSA_NAME_RANGE_INFO.
>
> Seems obvious now you've said it... And VRP1, which would have a separate
> SSA_NAME, does not generally call into match-simplify yet.
>
> I wonder if we'll take the ugly route of making the EVRP lattice global, and
> having get_range_info use it if it isn't empty (or checking some flag) and fall
> back to the current behavior otherwise. Seems simpler and cheaper than the
> alternatives I am trying to think about.
Once Jeff is settlet with his re-orgs I'm going to simply temporarily
adjust SSA_NAME_RANGE_INFO. Should be a very simple thing do to.
>From gcc-bugs-return-582643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 08:34:35 2017
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Subject: [Bug ipa/83094] ICE in ipa_modify_formal_parameters, at ipa-param-manipulation.c:105
Date: Wed, 22 Nov 2017 08:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code, openmp
CC| |marxin at gcc dot gnu.org
Component|fortran |ipa
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Not a regression since omp simd is new in GCC 7.2.
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Subject: [Bug rtl-optimization/83095] [8 regression] many tests fail starting with r255001
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-582645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 08:34:39 2017
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Subject: [Bug bootstrap/83096] Bootstrap on darwin x86_64-apple-darwin15.6.0 (revision 254990) fails
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |aldyh at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Aldy, this is yours.
>From gcc-bugs-return-582646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 08:34:40 2017
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Subject: [Bug libfortran/83097] Use __BYTE_ORDER__ instead of runtime test
Date: Wed, 22 Nov 2017 08:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug target/83100] [8 Regression] powerpc: internal compiler error: in get_variable_section, at varasm.c:1150 with -fdata-sections
Date: Wed, 22 Nov 2017 08:35:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Target| |powerpc
Component|c |target
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>From gcc-bugs-return-582648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 08:39:57 2017
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Subject: [Bug libgcc/83103] Improve __mulkc3 and __divkc3 on Power9
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-582649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 08:43:22 2017
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Subject: [Bug tree-optimization/83104] [8 Regression] ICE: Segmentation fault
Date: Wed, 22 Nov 2017 08:43:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #2)
> two_valued_val_range_p doesn't work on pointers, it uses vrp_val_min on the
> type of the arguments. Probably:
>
> --- vr-values.c (revision 255021)
> +++ vr-values.c (working copy)
> @@ -4091,7 +4091,7 @@ vr_values::simplify_stmt_using_ranges (g
> LHS = VAR == VAL1 ? (VAL1 BINOP CST) : (VAL2 BINOP CST) */
>
> if (TREE_CODE_CLASS (rhs_code) == tcc_binary
> - && INTEGRAL_TYPE_P (TREE_TYPE (lhs))
> + && INTEGRAL_TYPE_P (TREE_TYPE (rhs1))
> && ((TREE_CODE (rhs1) == INTEGER_CST
> && TREE_CODE (rhs2) == SSA_NAME)
> || (TREE_CODE (rhs2) == INTEGER_CST
>
> (or keep both tests)
and/or make two_valued_val_range_p return false for !INTEGRAL_TYPE_P
the above and/or this is pre-approved.
>From gcc-bugs-return-582650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 08:46:03 2017
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Subject: [Bug rtl-optimization/83095] [8 regression] many tests fail starting with r255001
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc64-unknown-linux-gnu |powerpc64-unknown-linux-gnu
| |, x86_64-*-*, i?86-*-*
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'm seeing the same on x86_64 {,-m32}
>From gcc-bugs-return-582651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 08:48:43 2017
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Subject: [Bug tree-optimization/83089] [8 Regression] ICE: Segmentation fault (in instantiate_scev_name)
Date: Wed, 22 Nov 2017 08:48:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 22 08:47:47 2017
New Revision: 255044
URL: https://gcc.gnu.org/viewcvs?rev=255044&root=gcc&view=rev
Log:
2017-11-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/83089
* tree-if-conv.c (pass_if_conversion::execute): If anything
changed reset SCEV and free the number of iteration estimates.
* gcc.dg/pr83089.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr83089.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-if-conv.c
>From gcc-bugs-return-582652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 08:49:08 2017
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Subject: [Bug tree-optimization/83089] [8 Regression] ICE: Segmentation fault (in instantiate_scev_name)
Date: Wed, 22 Nov 2017 08:49:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug libfortran/83070] -Wsign-compare warning in eoshift0
Date: Wed, 22 Nov 2017 08:51:00 -0000
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--- Comment #3 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Author: jb
Date: Wed Nov 22 08:51:21 2017
New Revision: 255045
URL: https://gcc.gnu.org/viewcvs?rev=255045&root=gcc&view=rev
Log:
PR 83070 Fix -Wsign-compare warning
2017-11-22 Janne Blomqvist <jb@gcc.gnu.org>
PR libfortran/83070
* intrinsics/eoshift0.c (eoshift0): Fix -Wsign-compare warning by
making a_ex and r_ex index_type instead of size_t.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/intrinsics/eoshift0.c
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Subject: [Bug tree-optimization/82847] [8 regression] gcc.dg/vect/slp-perm-9.c fail
Date: Wed, 22 Nov 2017 08:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82847
--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 21 Nov 2017, rsandifo at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82847
>
> rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |rsandifo at gcc dot gnu.org
>
> --- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
> Isn't the problem here that vect_perm_byte and vect_perm_short don't return
> true for x86_64, even though the patterns seem to be there in sse.md?
vect_perm_byte is only available with SSEn+
The test only uses vect_perm_short though.
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Subject: [Bug libfortran/83070] -Wsign-compare warning in eoshift0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83070
Janne Blomqvist <jb at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Fixed on trunk, closing.
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/83098] [8 regression] ICE in assert_rtx_eq_at, at selftest-rtl.c:57
Date: Wed, 22 Nov 2017 08:59:00 -0000
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--- Comment #1 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
This sounds like it might be an instance of what Jakub reported here:
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01957.html
(Note: I've not committed anything during this period!)
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Subject: [Bug tree-optimization/82042] signed integer overflow in ao_ref_init_from_ptr_and_size
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 22 09:04:47 2017
New Revision: 255046
URL: https://gcc.gnu.org/viewcvs?rev=255046&root=gcc&view=rev
Log:
2017-11-22 Richard Biener <rguenther@suse.de>
Revert
2017-11-21 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-11-21 Martin Liska <mliska@suse.cz>
PR rtl-optimization/82044
PR tree-optimization/82042
* dse.c (check_mem_read_rtx): Check for overflow.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/dse.c
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Subject: [Bug rtl-optimization/82044] runtime signed integer overflow in check_mem_read_rtx() and all_positions_needed_p() in dse.c
Date: Wed, 22 Nov 2017 09:05:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 22 09:04:47 2017
New Revision: 255046
URL: https://gcc.gnu.org/viewcvs?rev=255046&root=gcc&view=rev
Log:
2017-11-22 Richard Biener <rguenther@suse.de>
Revert
2017-11-21 Martin Liska <mliska@suse.cz>
Backport from mainline
2017-11-21 Martin Liska <mliska@suse.cz>
PR rtl-optimization/82044
PR tree-optimization/82042
* dse.c (check_mem_read_rtx): Check for overflow.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/dse.c
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Subject: [Bug rtl-optimization/82044] runtime signed integer overflow in check_mem_read_rtx() and all_positions_needed_p() in dse.c
Date: Wed, 22 Nov 2017 09:09:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 22 09:08:23 2017
New Revision: 255048
URL: https://gcc.gnu.org/viewcvs?rev=255048&root=gcc&view=rev
Log:
PR rtl-optimization/82044
PR tree-optimization/82042
* dse.c (record_store): Check for overflow.
(check_mem_read_rtx): Properly check for overflow if width == -1, call
add_wild_read instead of clear_rhs_from_active_local_stores on
overflow and log it into dump_file.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dse.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82042] signed integer overflow in ao_ref_init_from_ptr_and_size
Date: Wed, 22 Nov 2017 09:09:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 22 09:08:23 2017
New Revision: 255048
URL: https://gcc.gnu.org/viewcvs?rev=255048&root=gcc&view=rev
Log:
PR rtl-optimization/82044
PR tree-optimization/82042
* dse.c (record_store): Check for overflow.
(check_mem_read_rtx): Properly check for overflow if width == -1, call
add_wild_read instead of clear_rhs_from_active_local_stores on
overflow and log it into dump_file.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dse.c
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/81308] [8 regression] ICE in calc_dfs_tree, at dominance.c:458
Date: Wed, 22 Nov 2017 09:20:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |trippels at gcc dot gnu.org
--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Same ICE, different pattern on X86_64:
trippels@gcc67 ~ % cat PPCAsmParser.ii
struct A {
int operator[](int) const {}
};
struct B {
void m_fn1();
};
struct C {
virtual bool m_fn2(int, unsigned &, A &, int &, unsigned long &, bool);
};
template <class MCAsmParserImpl> struct D {
D(int) { MCAsmParserImpl(0, 0, 0, 0); }
};
int a;
namespace {
struct F : C {
bool m_fn2(int, unsigned &, A &, int &, unsigned long &, bool);
unsigned m_fn3(const A &, B &);
F(int, int, int, int) {}
};
}
bool F::m_fn2(int, unsigned &, A &p3, int &, unsigned long &, bool) {
B b;
m_fn3(p3, b);
}
void fn1() { D<F>(0); }
unsigned F::m_fn3(const A &p1, B &p2) {
for (int *p;; p++)
switch (*p) {
case 0:
p1[a];
case 1:
p2.m_fn1();
}
}
trippels@gcc67 ~ % g++ -w -c -O2 PPCAsmParser.ii
during GIMPLE pass: switchconv
PPCAsmParser.ii: In function ‘unsigned int {anonymous}::F::m_fn3(const A&,
B&)’:
PPCAsmParser.ii:34:1: internal compiler error: in calc_dfs_tree, at
dominance.c:458
}
^
0x9cce37 calc_dfs_tree
../../gcc/gcc/dominance.c:458
0x9ce03d calculate_dominance_info(cdi_direction)
../../gcc/gcc/dominance.c:734
0xfdcb93 verify_ssa(bool, bool)
../../gcc/gcc/tree-ssa.c:1082
0xcc80e7 execute_function_todo
../../gcc/gcc/passes.c:2001
0xcc9012 execute_todo
../../gcc/gcc/passes.c:2048
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Subject: [Bug debug/83034] [8 Regression] ice in mem_loc_descriptor, at dwarf2out.c :15669
Date: Wed, 22 Nov 2017 09:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83034
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 22 09:43:28 2017
New Revision: 255049
URL: https://gcc.gnu.org/viewcvs?rev=255049&root=gcc&view=rev
Log:
PR debug/83034
* dwarf2out.c (mem_loc_descriptor): Handle VEC_SERIES.
* gcc.dg/pr83034.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr83034.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/82875] [8 Regression] ICE at -Os on valid code on x86_64-linux-gnu: in find_widening_optab_handler_and_mode, at optabs-query.c:414
Date: Wed, 22 Nov 2017 09:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82875
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 22 09:57:28 2017
New Revision: 255050
URL: https://gcc.gnu.org/viewcvs?rev=255050&root=gcc&view=rev
Log:
PR middle-end/82875
* optabs.c (expand_doubleword_mult, expand_binop): Before calling
expand_binop with *mul_widen_optab, make sure at least one of the
operands doesn't have VOIDmode.
* gcc.dg/pr82875.c: New test.
* gcc.c-torture/compile/pr82875.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr82875.c
trunk/gcc/testsuite/gcc.dg/pr82875.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/optabs.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/82847] [8 regression] gcc.dg/vect/slp-perm-9.c fail
Date: Wed, 22 Nov 2017 10:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82847
--- Comment #5 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #4)
> On Tue, 21 Nov 2017, rsandifo at gcc dot gnu.org wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82847
> >
> > rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
> >
> > What |Removed |Added
> > ----------------------------------------------------------------------------
> > CC| |rsandifo at gcc dot gnu.org
> >
> > --- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
> > Isn't the problem here that vect_perm_byte and vect_perm_short don't return
> > true for x86_64, even though the patterns seem to be there in sse.md?
>
> vect_perm_byte is only available with SSEn+
>
> The test only uses vect_perm_short though.
Sure, fixing only vect_perm_short would be enough for this PR. I just
meant that the same problem seems to apply to vect_perm_byte too.
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Subject: [Bug debug/83084] [7/8 Regression] -fcompare-debug failure on ppc64le
Date: Wed, 22 Nov 2017 10:02:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 22 10:02:19 2017
New Revision: 255051
URL: https://gcc.gnu.org/viewcvs?rev=255051&root=gcc&view=rev
Log:
PR debug/83084
* valtrack.c (propagate_for_debug_subst, propagate_for_debug): Reset
debug insns if they would contain UNSPEC_VOLATILE or volatile asm.
(dead_debug_insert_temp): Likewise, but also ignore even non-volatile
asm.
* g++.dg/opt/pr83084.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/opt/pr83084.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/valtrack.c
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Subject: [Bug debug/83034] [8 Regression] ice in mem_loc_descriptor, at dwarf2out.c :15669
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/82875] [8 Regression] ICE at -Os on valid code on x86_64-linux-gnu: in find_widening_optab_handler_and_mode, at optabs-query.c:414
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug debug/83084] [7 Regression] -fcompare-debug failure on ppc64le
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8 Regression] |[7 Regression]
|-fcompare-debug failure on |-fcompare-debug failure on
|ppc64le |ppc64le
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Subject: [Bug tree-optimization/82847] [8 regression] gcc.dg/vect/slp-perm-9.c fail
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 22 Nov 2017, rsandifo at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82847
>
> --- Comment #5 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
> (In reply to rguenther@suse.de from comment #4)
> > On Tue, 21 Nov 2017, rsandifo at gcc dot gnu.org wrote:
> >
> > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82847
> > >
> > > rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
> > >
> > > What |Removed |Added
> > > ----------------------------------------------------------------------------
> > > CC| |rsandifo at gcc dot gnu.org
> > >
> > > --- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
> > > Isn't the problem here that vect_perm_byte and vect_perm_short don't return
> > > true for x86_64, even though the patterns seem to be there in sse.md?
> >
> > vect_perm_byte is only available with SSEn+
> >
> > The test only uses vect_perm_short though.
>
> Sure, fixing only vect_perm_short would be enough for this PR. I just
> meant that the same problem seems to apply to vect_perm_byte too.
We mostly use the "generic" vect_perm ... or maybe we used to do that.
>From gcc-bugs-return-582670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 11:01:19 2017
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Subject: [Bug go/83102] [8 Regression] go bootstrap error in ast-dump.cc due to __is_invocable failure
Date: Wed, 22 Nov 2017 11:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83102
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is the fix for the Go frontend (untested, but obviously correct):
--- a/gcc/go/gofrontend/gogo.h
+++ b/gcc/go/gofrontend/gogo.h
@@ -117,7 +117,7 @@ class Import_init
// For sorting purposes.
struct Import_init_lt {
- bool operator()(const Import_init* i1, const Import_init* i2)
+ bool operator()(const Import_init* i1, const Import_init* i2) const
{
return i1->init_name() < i2->init_name();
}
>From gcc-bugs-return-582671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 11:06:52 2017
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Subject: [Bug go/83102] [8 Regression] go bootstrap error in ast-dump.cc due to __is_invocable failure
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Nov 22 11:06:15 2017
New Revision: 255052
URL: https://gcc.gnu.org/viewcvs?rev=255052&root=gcc&view=rev
Log:
PR go/83102 relax std::set checks for invocable comparison object
PR go/83102
* include/bits/stl_tree.h (_Rb_tree): Relax invocable checks for
comparison object pre-C++17.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/stl_tree.h
>From gcc-bugs-return-582672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 11:09:42 2017
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
Date: Wed, 22 Nov 2017 11:09:00 -0000
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--- Comment #14 from Andreas Schwab <schwab@linux-m68k.org> ---
(In reply to Jan Hubicka from comment #11)
> I was able to bootstrap on ia64 box (terbium) shortly before the unwind
> changes went in without the bootstrap miscompare.
Your testing was invalidated by the broken inline.
>From gcc-bugs-return-582675-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 11:15:45 2017
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Subject: [Bug c++/81930] [meta-bug] Issues with -Weffc++
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81930
Bug 81930 depends on bug 68391, which changed state.
Bug 68391 Summary: -Wsuggest-override does not work on Item 12 of Effective Modern C++
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68391
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
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Subject: [Bug target/82641] Unable to enable crc32 for a certain function with target attribute on ARM (aarch32)
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |8.0
Severity|normal |enhancement
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Subject: [Bug c++/68391] -Wsuggest-override does not work on Item 12 of Effective Modern C++
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Alexander Volkov from comment #1)
> -Wsuggest-override should not produce warnings in this case, because none of
> members of Derived override virtual functions of Base.
>
> -Woverloaded-virtual has another meaning: "With this option, the compiler
> warns when you define a function with the same name as a virtual function,
> but with a type signature that does not match any declarations from the base
> class."
I guess since the reporter never replied, I'll close this bug based on this
reply.
>From gcc-bugs-return-582676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 11:17:54 2017
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Subject: [Bug c++/77984] Invalid warning on templated operator= with -Weffc++
Date: Wed, 22 Nov 2017 11:17:00 -0000
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--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #5)
> (In reply to Jonathan Wakely from comment #4)
> > No, but IMHO it should be (unless somebody fixes it, see PR 16166 and PR
> > 16168 and PR 55837 and others).
>
> I'd rather see it fixed; I might give it a try myself once I learn enough
> c++ to know what I'm doing. In the meantime I'll make a meta-bug to gather
> all the -Weffc++ bugs together.
Update: The meta-bug is now bug 81930, for reference.
>From gcc-bugs-return-582677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 11:21:07 2017
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Subject: [Bug rtl-optimization/83095] [8 regression] many tests fail starting with r255001
Date: Wed, 22 Nov 2017 11:21:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Retry with r255048 ?
>From gcc-bugs-return-582678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 11:30:02 2017
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From: "nsz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83105] New: [8 regression] error: -mfloat-abi=hard: selected processor lacks an FPU
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83105
Bug ID: 83105
Summary: [8 regression] error: -mfloat-abi=hard: selected
processor lacks an FPU
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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if gcc is configured with
--with-float=hard --target=arm-linux-gnueabihf
but without --with-fpu or --with-arch setting then the
configuration succeeds but the built xgcc fails:
$ ./xgcc -B. -xc - </dev/null
cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
during the build the selftest segfaults:
$ ./xgcc -B. -xc -nostdinc /dev/null -S -o /dev/null
-fself-test=SRC/gcc/testsuite/selftests
cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
cc1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
previously such a configuration worked and
i think produced a compiler as if
--with-arch=armv5t --with-fpu=vfp
was used, at least the attributes in object files
created by such a compiler was
Attribute Section: aeabi
File Attributes
Tag_CPU_name: "ARM10TDMI"
Tag_CPU_arch: v5T
Tag_ARM_ISA_use: Yes
Tag_THUMB_ISA_use: Thumb-1
Tag_FP_arch: VFPv2
Tag_ABI_PCS_wchar_t: 4
Tag_ABI_FP_rounding: Needed
Tag_ABI_FP_denormal: Needed
Tag_ABI_FP_exceptions: Needed
Tag_ABI_FP_number_model: IEEE 754
Tag_ABI_align_needed: 8-byte
Tag_ABI_align_preserved: 8-byte, except leaf SP
Tag_ABI_enum_size: int
Tag_ABI_VFP_args: VFP registers
Tag_ABI_optimization_goals: Aggressive Size
>From gcc-bugs-return-582679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 11:33:12 2017
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Subject: =?UTF-8?B?W0J1ZyBib290c3RyYXAvODMxMDZdIE5ldzogWzggcmVncmVzc2lvbl0gbGli?= =?UTF-8?B?Z29tcC90YXJnZXQuYzoyNjcxOjI6IGVycm9yOiDigJhzdHJuY2F04oCZIHNw?= =?UTF-8?B?ZWNpZmllZCBib3VuZCA1IGVxdWFscyBzb3VyY2UgbGVuZ3RoIFstV2Vycm9y?= =?UTF-8?B?PXN0cmluZ29wLW92ZXJmbG93PV0=?Date: Wed, 22 Nov 2017 11:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83106
Bug ID: 83106
Summary: [8 regression] libgomp/target.c:2671:2: error:
‘strncat’ specified bound 5 equals source length
[-Werror=stringop-overflow=]
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: dimhen at gmail dot com
Target Milestone: ---
r254985 PASS
r255052 FAIL
libtool: compile: /home/dimhen/build/gcc_current/./gcc/xgcc
-B/home/dimhen/build/gcc_current/./gcc/
-B/usr/local/gcc_current/x86_64-pc-linux-gnu/bin/
-B/usr/local/gcc_current/x86_64-pc-linux-gnu/lib/ -isystem
/usr/local/gcc_current/x86_64-pc-linux-gnu/include -isystem
/usr/local/gcc_current/x86_64-pc-linux-gnu/sys-include -DHAVE_CONFIG_H -I.
-I/home/dimhen/src/gcc_current/libgomp
-I/home/dimhen/src/gcc_current/libgomp/config/linux/x86
-I/home/dimhen/src/gcc_current/libgomp/config/linux
-I/home/dimhen/src/gcc_current/libgomp/config/posix
-I/home/dimhen/src/gcc_current/libgomp
-I/home/dimhen/src/gcc_current/libgomp/../include -Wall -Werror -pthread
-ftls-model=initial-exec -fcf-protection -mcet -g -O2 -MT target.lo -MD -MP -MF
.deps/target.Tpo -c /home/dimhen/src/gcc_current/libgomp/target.c -fPIC -DPIC
-o .libs/target.o
/home/dimhen/src/gcc_current/libgomp/target.c: In function ‘gomp_target_init’:
/home/dimhen/src/gcc_current/libgomp/target.c:2671:2: error: ‘strncat’
specified bound 5 equals source length [-Werror=stringop-overflow=]
strncat (plugin_name, cur, next ? next - cur : strlen (cur));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[5]: *** [Makefile:659: target.lo] Error 1
$ ~/src/gcc_current/configure --prefix=/usr/local/gcc_current
--enable-checking=yes,df,fold,rtl,extra --enable-languages=c,c++,lto
--disable-multilib --enable-shared --enable-threads=posix --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-initfini-array --with-isl --enable-libmpx
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-gnu-indirect-function --with-tune=native
$ make
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Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
Date: Wed, 22 Nov 2017 11:37:00 -0000
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--- Comment #18 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Wed Nov 22 11:37:16 2017
New Revision: 255053
URL: https://gcc.gnu.org/viewcvs?rev=255053&root=gcc&view=rev
Log:
2017-11-22 Paul Thomas <pault@gcc.gnu.org>
PR fortran/79072
* trans-stmt.c (trans_associate_var): Weaken the over strong
condition for using the fake result decl.
2017-11-22 Paul Thomas <pault@gcc.gnu.org>
PR fortran/79072
* gfortran.dg/class_result_6.f90: New test for comment 10 of
the PR.
Added:
trunk/gcc/testsuite/gfortran.dg/class_result_6.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-582681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 11:42:01 2017
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Subject: [Bug rtl-optimization/83098] [8 regression] ICE in assert_rtx_eq_at, at selftest-rtl.c:57
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yes, please retry with r255048 or later.
>From gcc-bugs-return-582682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 11:49:07 2017
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/83098] [8 regression] ICE in assert_rtx_eq_at, at selftest-rtl.c:57
Date: Wed, 22 Nov 2017 11:49:00 -0000
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--- Comment #3 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Yes, please retry with r255048 or later.
Currently running: after omitting Go for PR go/83102, I'm into make
check now.
Thanks.
Rainer
>From gcc-bugs-return-582683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 11:53:56 2017
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Subject: [Bug rtl-optimization/82628] [8 Regression] wrong code at -Os on x86_64-linux-gnu in the 32-bit mode
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-582684-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 11:54:27 2017
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Subject: [Bug middle-end/82556] [7/8 Regression] internal compiler error in curr_insn_transform, at lra-constraints.c:4307
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-582685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 12:12:28 2017
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Subject: [Bug c++/59930] template friend declarations, namespaces, and explicit instantiations don't mix
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>From gcc-bugs-return-582686-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 12:36:08 2017
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Subject: [Bug tree-optimization/83044] [8 Regression] ice in contains_struct_check
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 22 12:35:26 2017
New Revision: 255054
URL: https://gcc.gnu.org/viewcvs?rev=255054&root=gcc&view=rev
Log:
PR tree-optimization/83044
* tree-vrp.c (vrp_prop::check_array_ref): If eltsize is not
INTEGER_CST or is 0, clear up_bound{,_p1} and later ignore tests
that need the upper bound. Subtract offset from
get_addr_base_and_unit_offset only if positive and subtract it
before division by eltsize rather than after it.
* gcc.dg/pr83044.c: New test.
* c-c++-common/Warray-bounds.c (fb): Fix up MAX value.
Added:
trunk/gcc/testsuite/gcc.dg/pr83044.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/Warray-bounds.c
trunk/gcc/tree-vrp.c
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Subject: [Bug tree-optimization/83044] [8 Regression] ice in contains_struct_check
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/82402] [6/7/8 Regression] error: SSA_NAME_OCCURS_IN_ABNORMAL_PHI should be set
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So shall we ignore it on them in the checking code, or make sure it is never
set?
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42678
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42678&action=edit
gcc8-pr83106.patch
I think the warning is just bogus for strncat. Unlike strncpy, which is weird,
sometimes doesn't terminate, sometimes unnecessarily fills with zeros and the
third argument represents the size of the destination (so indeed specifying the
size based on strlen of the source might be a bug), strncat does something
different, the third argument is the max number of chars to take from the src
string; and strncat always terminates. So, passing strlen (src) as third
argument is nothing problematic, it is just another way of specifying strcat,
or
using something strlen based is sane too (both smaller or larger).
That said, the code in target.c is ugly and relies on tree-ssa-strlen.c pass to
fix the mess up, so I'll test and commit the attached patch.
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Also useful would be to warn for members that don't access any state at all:
struct indirect_cmp {
bool operator()(const X* l, const X* r) { return *l < *r; }
};
This comparison object should have a const-qualified member function to be
usable with associative containers such as std::set (see PR 83102 for example).
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82402
--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 22 Nov 2017, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82402
>
> Jakub Jelinek <jakub at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |jakub at gcc dot gnu.org
>
> --- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> So shall we ignore it on them in the checking code, or make sure it is never
> set?
Neither. We should fix whoever fails to set it.
Whether we want to at some point ignore it / remove it is another
question. Looks like the culprit is somehow the vectorizer pass
which ends up with a spurious MEM_23(ab) for me. I guess it doesn't
really expect the loop exit to end in a call with just an abnormal
outgoing edge...
Let me have a look.
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From: "contact+gcc at clementfevrier dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83107] New: -Wshift-count-overflow does not report left shift count >= width in some cases.
Date: Wed, 22 Nov 2017 13:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83107
Bug ID: 83107
Summary: -Wshift-count-overflow does not report left shift
count >= width in some cases.
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: contact+gcc at clementfevrier dot fr
Target Milestone: ---
-Wshift-count-overflow does not report left shift count >= width in some cases.
If the result of a<<b is cast into a type that has a longer size than b, the
flag -Wshift-count-overflow will not display any warning.
I think it is a bug because, for example, (unsigned long int)1<<32 is just a
recast of the result of 1<<32.
1 is an int, so 1<<32 is also an int with the value 0, which is eventually
recast into an unsigned long int.
So -Wshift-count-overflow should report the count overflow.
The following code:
int main()
{
auto val1 = 1<<32;
auto val2 = (unsigned long int)1<<32;
}
display this message when compiled (g++ -std=gnu++11 main.cpp):
main.cpp: In function ‘int main()’:
main.cpp:3:17: warning: left shift count >= width of type
[-Wshift-count-overflow]
auto val1 = 1<<32;
^~
while I would expect to have in addition:
main.cpp:4:17: warning: left shift count >= width of type
[-Wshift-count-overflow]
auto val2 = (unsigned long int)1<<32;
^~
I tried with both gcc v5 and v8. Their respective "-save-temps" output follows
% gcc -v -save-temps -std=gnu++11 main.cpp
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
5.4.0-6ubuntu1~16.04.5' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.5)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=gnu++11' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE main.cpp -mtune=generic -march=x86-64
-std=gnu++11 -fpch-preprocess -fstack-protector-strong -Wformat
-Wformat-security -o main.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/5"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/5/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/5
/usr/include/x86_64-linux-gnu/c++/5
/usr/include/c++/5/backward
/usr/lib/gcc/x86_64-linux-gnu/5/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=gnu++11' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -fpreprocessed main.ii -quiet
-dumpbase main.cpp -mtune=generic -march=x86-64 -auxbase main -std=gnu++11
-version -fstack-protector-strong -Wformat -Wformat-security -o main.s
GNU C++11 (Ubuntu 5.4.0-6ubuntu1~16.04.5) version 5.4.0 20160609
(x86_64-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++11 (Ubuntu 5.4.0-6ubuntu1~16.04.5) version 5.4.0 20160609
(x86_64-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 86227c1230bcf689e6a1b7d559effd6b
main.cpp: In function ‘int main()’:
main.cpp:3:17: warning: left shift count >= width of type
[-Wshift-count-overflow]
auto val1 = 1<<32;
^
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=gnu++11' '-mtune=generic'
'-march=x86-64'
as -v --64 -o main.o main.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=gnu++11' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/5/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
-plugin-opt=-fresolution=main.res -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --sysroot=/
--build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed
-dynamic-linker /lib64/ld-linux-x86-64.so.2 -z relro
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crt1.o
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crti.o
/usr/lib/gcc/x86_64-linux-gnu/5/crtbegin.o -L/usr/lib/gcc/x86_64-linux-gnu/5
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib -L/lib/x86_64-linux-gnu
-L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib
-L/usr/lib/gcc/x86_64-linux-gnu/5/../../.. main.o -lgcc --as-needed -lgcc_s
--no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed
/usr/lib/gcc/x86_64-linux-gnu/5/crtend.o
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crtn.o
% gcc -v -save-temps main.cpp
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/clement/bin/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/clement/bin
Thread model: posix
gcc version 8.0.0 20171023 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-mtune=generic' '-march=x86-64'
/home/clement/bin/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/cc1plus -E -quiet -v
-imultiarch x86_64-linux-gnu -D_GNU_SOURCE main.cpp -mtune=generic
-march=x86-64 -fpch-preprocess -o main.ii
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../include/c++/8.0.0
/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../include/c++/8.0.0/x86_64-pc-linux-gnu
/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../include/c++/8.0.0/backward
/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/include
/usr/local/include
/home/clement/bin/include
/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-mtune=generic' '-march=x86-64'
/home/clement/bin/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/cc1plus -fpreprocessed
main.ii -quiet -dumpbase main.cpp -mtune=generic -march=x86-64 -auxbase main
-version -o main.s
GNU C++14 (GCC) version 8.0.0 20171023 (experimental) (x86_64-pc-linux-gnu)
compiled by GNU C version 8.0.0 20171023 (experimental), GMP version
6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C++14 (GCC) version 8.0.0 20171023 (experimental) (x86_64-pc-linux-gnu)
compiled by GNU C version 8.0.0 20171023 (experimental), GMP version
6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 7a9ea9098b162b5d41035c367ad9dcf8
main.cpp: In function ‘int main()’:
main.cpp:3:17: warning: left shift count >= width of type
[-Wshift-count-overflow]
auto val1 = 1<<32;
^~
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-mtune=generic' '-march=x86-64'
as -v --64 -o main.o main.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COMPILER_PATH=/home/clement/bin/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/:/home/clement/bin/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/:/home/clement/bin/libexec/gcc/x86_64-pc-linux-gnu/:/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/:/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/
LIBRARY_PATH=/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/:/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../lib64/:/lib/x86_64-linux-gnu/:/lib/../lib64/:/usr/lib/x86_64-linux-gnu/:/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-mtune=generic' '-march=x86-64'
/home/clement/bin/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/collect2 -plugin
/home/clement/bin/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/liblto_plugin.so
-plugin-opt=/home/clement/bin/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
-plugin-opt=-fresolution=main.res -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s
--eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2
/usr/lib/x86_64-linux-gnu/crt1.o /usr/lib/x86_64-linux-gnu/crti.o
/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/crtbegin.o
-L/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0
-L/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../lib64
-L/lib/x86_64-linux-gnu -L/lib/../lib64 -L/usr/lib/x86_64-linux-gnu
-L/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../.. main.o -lgcc
--as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed
/home/clement/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/crtend.o
/usr/lib/x86_64-linux-gnu/crtn.o
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-mtune=generic' '-march=x86-64'
>From gcc-bugs-return-582696-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 13:32:01 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82410] [7/8 Regression] ICE in replace_placeholders_r
Date: Wed, 22 Nov 2017 13:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82410
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It is the "nor whether SUB is a CONSTRUCTOR." part of the patch that causes
this.
The PLACEHOLDER_EXPR's type is S, while the VAR_DECL passed as second argument
to replace_placeholders is a temporary with A type.
sub is:
main()::S::operator main()::A (&TARGET_EXPR <D.2375, {.p=(int &) &l,
.x=*(&<PLACEHOLDER_EXPR struct S>)->p}>);
Don't know replace_placeholders enough to fix this myself.
>From gcc-bugs-return-582697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 13:34:04 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83045] [8 Regression] -Wreturn-type regression in C++
Date: Wed, 22 Nov 2017 13:34:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-582698-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 13:38:57 2017
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Subject: [Bug target/82713] [8 Regression] ICE in ix86_builtin_vectorization_cost, at config/i386/i386.c:44475
Date: Wed, 22 Nov 2017 13:38:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/82547] wide_int is not setting overflow properly for large unsigned add/subtract calculations.
Date: Wed, 22 Nov 2017 13:59:00 -0000
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--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Wed Nov 22 13:58:57 2017
New Revision: 255059
URL: https://gcc.gnu.org/viewcvs?rev=255059&root=gcc&view=rev
Log:
PR82547: Undetected overflow for UNSIGNED wide_ints
wi::add_large and wi::sub_large weren't setting the overflow bit
correctly for unsigned operations if the result needed fewer HWIs
than the precision.
2017-11-22 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
PR middle-end/82547
* wide-int.cc (wi::add_large, wi::sub_large): Fix overflow detection
for unsigned values with fewer HWIs than the precision.
(test_overflow): New function.
(wide_int_cc_tests): Call it.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/wide-int.cc
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Subject: [Bug middle-end/83004] [8 regression] gcc.dg/vect/pr81136.c fail
Date: Wed, 22 Nov 2017 13:59:00 -0000
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--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Wed Nov 22 13:58:46 2017
New Revision: 255058
URL: https://gcc.gnu.org/viewcvs?rev=255058&root=gcc&view=rev
Log:
PR83004: Accidental change to pr81136.c for VECTOR_BITS==128
r254589 was supposed to leave tests unchanged for the default
VECTOR_BITS==128, but I must have got my sums wrong on pr81136.c.
2017-11-22 Richard Sandiford <richard.sandiford@linaro.org>
gcc/testsuite/
PR testsuite/83004
* gcc.dg/vect/pr81136.c: Restore previous alignment of 32
in the default case.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/vect/pr81136.c
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Subject: [Bug middle-end/82547] wide_int is not setting overflow properly for large unsigned add/subtract calculations.
Date: Wed, 22 Nov 2017 14:04:00 -0000
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--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Patch applied to trunk. Not sure if we want to backport or not, so leaving
open just in case.
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Subject: [Bug middle-end/83004] [8 regression] gcc.dg/vect/pr81136.c fail
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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--- Comment #5 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Patch applied.
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Subject: [Bug go/83102] [8 Regression] go bootstrap error in ast-dump.cc due to __is_invocable failure
Date: Wed, 22 Nov 2017 14:10:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 42679
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42679&action=edit
Patch to make comparisons work on const objects.
Parse::Enclosing_var_comparison::operator() needs a fix too.
With this patch I can bootstrap with Go at r255051 (after that it builds
without a patch, because I relaxed the static_assert in libstdc++).
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Subject: [Bug target/83100] [8 Regression] powerpc: internal compiler error: in get_variable_section, at varasm.c:1150 with -fdata-sections
Date: Wed, 22 Nov 2017 14:30:00 -0000
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--- Comment #2 from Helmut Grohne <helmut at subdivi dot de> ---
affects armel https://jenkins.debian.net/job/rebootstrap_armel_gcc8/2/console
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Subject: [Bug rtl-optimization/63491] Ice in LRA with simple vector test case on power
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
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--- Comment #17 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
GCC 5 has closed, so this can also.
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Subject: [Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)
Date: Wed, 22 Nov 2017 14:52:00 -0000
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--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
First of all, thanks a lot for reproducer!
Here are times with vectorizer enabled, disabled and no costmodel
Performance counter stats for './a.out-vect 21 1000000' (10 runs):
4588.055614 task-clock:u (msec) # 1.000 CPUs utilized
( +- 0.49% )
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
88 page-faults:u # 0.019 K/sec
( +- 0.44% )
14,911,755,271 cycles:u # 3.250 GHz
( +- 0.37% )
52,564,741,152 instructions:u # 3.53 insn per cycle
( +- 0.00% )
4,073,206,037 branches:u # 887.785 M/sec
( +- 0.00% )
18,106,857 branch-misses:u # 0.44% of all branches
( +- 0.30% )
4.589172192 seconds time elapsed
( +- 0.50% )
jan@skylake:~/trunk/build/tonto> perf stat --repeat 10 ./a.out-novect 21
1000000
Performance counter stats for './a.out-novect 21 1000000' (10 runs):
3549.651576 task-clock:u (msec) # 1.000 CPUs utilized
( +- 0.65% )
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
88 page-faults:u # 0.025 K/sec
( +- 0.42% )
11,563,811,687 cycles:u # 3.258 GHz
( +- 0.61% )
39,259,740,624 instructions:u # 3.40 insn per cycle
( +- 0.00% )
3,061,205,511 branches:u # 862.396 M/sec
( +- 0.00% )
11,774,836 branch-misses:u # 0.38% of all branches
( +- 0.36% )
3.550955730 seconds time elapsed
( +- 0.65% )
jan@skylake:~/trunk/build/tonto> perf stat --repeat 10 ./a.out-nocost 21
1000000
Performance counter stats for './a.out-nocost 21 1000000' (10 runs):
4621.515923 task-clock:u (msec) # 1.000 CPUs utilized
( +- 0.31% )
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
87 page-faults:u # 0.019 K/sec
( +- 0.35% )
14,965,340,896 cycles:u # 3.238 GHz
( +- 0.30% )
52,817,740,929 instructions:u # 3.53 insn per cycle
( +- 0.00% )
4,326,205,814 branches:u # 936.101 M/sec
( +- 0.00% )
16,615,805 branch-misses:u # 0.38% of all branches
( +- 0.10% )
4.622600700 seconds time elapsed
( +- 0.31% )
So vectorization hurts both in time and instruction count.
There are two loops to vectorize.
_34 = _74 + S.2_106;
_35 = _34 * _121;
_36 = _35 + _124;
_38 = _36 * _37;
_39 = (sizetype) _38;
_40 = _72 + _39;
_41 = MEM[(real(kind=8)[0:] *)A.14_116][S.2_106];
*_40 = _41;
S.2_88 = S.2_106 + 1;
if (_77 < S.2_88)
goto <bb 9>; [15.00%]
else
goto loopback; [85.00%]
Vector inside of loop cost: 76
Vector prologue cost: 24
Vector epilogue cost: 48
Scalar iteration cost: 24
Scalar outside cost: 24
Vector outside cost: 72
prologue iterations: 0
epilogue iterations: 2
Calculated minimum iters for profitability: 3
tonto.f90:26:0: note: Runtime profitability threshold = 4
tonto.f90:26:0: note: Static estimate profitability threshold = 11
and
_18 = S.2_105 + 1;
_19 = _18 * _61;
_2 = _19 - _61;
_21 = _2 * _3;
_22 = (sizetype) _21;
_23 = _11 + _22;
_24 = *_23;
_25 = _70 + S.2_105;
_26 = _25 * _117;
_27 = _26 + _120;
_29 = _27 * _28;
_30 = (sizetype) _29;
_31 = _68 + _30;
_32 = *_31;
_33 = _24 * _32;
MEM[(real(kind=8)[0:] *)A.14_116][S.2_105] = _33;
if (_18 > _77)
goto <bb 7>; [15.00%]
else
loopback; [85.00%]
Vector inside of loop cost: 176
Vector prologue cost: 24
Vector epilogue cost: 112
Scalar iteration cost: 48
Scalar outside cost: 24
Vector outside cost: 136
prologue iterations: 0
epilogue iterations: 2
Calculated minimum iters for profitability: 7
Static estimate profitability threshold = 18
Both loops iterate about 9 time so the thresholds are close to being never
executed. So the slowdown seems to be just colateral damage of adding
vectorized loop for something that is not executed enough.
This is how we handle first loop:
_34 = _74 + S.2_106; irrelevant
_35 = _34 * _121; irrelevant
_36 = _35 + _124; irrelevant
_38 = _36 * _37; irrelevant
_39 = (sizetype) _38; irrelevant
_40 = _72 + _39; irrelevant
_41 = MEM[(real(kind=8)[0:] *)A.14_116][S.2_106]; This is accounted
as unaligned vector load
inside_cost = 12
*_40 = _41;
inside_cost = 64
This is accounted as 4 stores (12*4=48) and 4 vec to scalar (4*4)
S.2_88 = S.2_106 + 1;
if (_77 < S.2_88)
goto <bb 9>; [15.00%]
else
goto loopback; [85.00%]
Scalar code is counted as load+store = 12+12=24
Accounted costs should match latencies multiplied by 4.
Now real code with unrolling/scheduling disabled:
movq %rdx, %rsi
salq $5, %rsi
vector load
vmovupd (%r8,%rsi), %ymm0
Here the cost model is correct. it is 3 cycles and we multiply by
4.
vector store
vmovlpd %xmm0, (%rax)
vmovhpd %xmm0, (%rax,%rcx)
vextractf128 $0x1, %ymm0, %xmm0
vmovlpd %xmm0, (%rax,%rcx,2)
vmovhpd %xmm0, (%rax,%rdi)
Here the cost model is somehwat pesimisted because it accounts 4*1
cycles for unpacking vectors to scalars and 3*1 cycles for stores
Unpacking is hidden in vmov* cost model does not know about and
vextractf128 which has latency 3.
incq %rdx
addq %r9, %rax
cmpq %rdx, %r13
jne .L10
Second loop:
_18 = S.2_105 + 1; irrelevant
_19 = _18 * _61; irrelevant
_2 = _19 - _61; irrelevant
_21 = _2 * _3; irrelevant
_22 = (sizetype) _21; irrelevant
_23 = _11 + _22; irrelevant
_24 = *_23; Strided load
4*12 (4 loads) + 4*4 (4 vec_construct) + 48 (vec construct) = 72
_25 = _70 + S.2_105; irrelevant
_26 = _25 * _117; irrelevant
_27 = _26 + _120; irrelevant
_29 = _27 * _28; irrelevant
_30 = (sizetype) _29; irrelevant
_31 = _68 + _30; irrelevant
_32 = *_31; Strided load
72 again
_33 = _24 * _32; vector multiply
4*5 (5 cycles mult)
MEM[(real(kind=8)[0:] *)A.14_116][S.2_105] = _33; Vector store
12
if (_18 > _77)
goto <bb 7>; [15.00%]
else
loopback; [85.00%]
Generated code is:
vmovsd (%rsi), %xmm1
vmovhpd (%rsi,%r15), %xmm1, %xmm2
vmovsd (%rcx), %xmm0
vmovhpd (%rcx,%r15), %xmm0, %xmm0
vinsertf128 $0x1, %xmm2, %ymm0, %ymm1
strided load
vmovsd (%rdi), %xmm0
vmovhpd (%rdi,%r9), %xmm0, %xmm2
vmovsd (%rax), %xmm0
vmovhpd (%rax,%r9), %xmm0, %xmm0
vinsertf128 $0x1, %xmm2, %ymm0, %ymm0
strided load
vmulpd %ymm0, %ymm1, %ymm0
vector mult
movq %rdx, %r11
salq $5, %r11
vmovupd %ymm0, (%r8,%r11)
vector store
incq %rdx
addq %r10, %rax
addq %rbx, %rcx
addq %rbx, %rsi
addq %r10, %rdi
cmpq %rdx, %r13
jne .L8
So it seems that both loops are faster in vector version and cost model
is actually on conservative side. Again the strided load latency is much
shorter. 3+3+3=9 instead of 18 we estimate.
The slowdown comes from outside of loop body - we end up spilling to stack a
lot. This can be checked by increasing the trip count of loops from approx 10
up:
jan@skylake:~/trunk/build/tonto> perf stat --repeat 10 ./a.out-novect 1000 10
jan@skylake:~/trunk/build/tonto> perf stat --repeat 10 ./a.out-vect 1000 10
Performance counter stats for './a.out-vect 1000 10' (10 runs):
3331.057127 task-clock:u (msec) # 1.000 CPUs utilized
( +- 1.12% )
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
470,018 page-faults:u # 0.141 M/sec
( +- 0.02% )
9,387,354,503 cycles:u # 2.818 GHz
( +- 1.26% )
18,782,578,729 instructions:u # 2.00 insn per cycle
( +- 0.00% )
522,121,680 branches:u # 156.744 M/sec
( +- 0.00% )
560,198 branch-misses:u # 0.11% of all branches
( +- 0.55% )
3.332128337 seconds time elapsed
( +- 1.12% )
Performance counter stats for './a.out-novect 1000 10' (10 runs):
3576.167709 task-clock:u (msec) # 0.999 CPUs utilized
( +- 0.69% )
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
470,222 page-faults:u # 0.131 M/sec
( +- 0.02% )
9,938,129,346 cycles:u # 2.779 GHz
( +- 0.84% )
22,317,980,606 instructions:u # 2.25 insn per cycle
( +- 0.00% )
692,632,083 branches:u # 193.680 M/sec
( +- 0.00% )
626,346 branch-misses:u # 0.09% of all branches
( +- 3.29% )
3.577986466 seconds time elapsed
( +- 0.68% )
So I am not sure how much we can fix in cost itself (we should consider
accounting for throughputs rather than lantencies but that will only make
vectorization happen more often.
Because upper bound on the loop iteration count is not know,
we probably can try to make vectorizer less harmful.
I will look into the profile of the non-vectorized path and see if I can
account it more. Register allocation is pretty bad. Since internal loop
consume all registers, we end up doing almost everything outside main loop in
stack.
Other possible improvements would be to unswitch the outer loop for the two
conditionals. Number of iteration of the vectorized loop is determined by the
outermost loop.
Of course we do only unswitching before vectorization which kills this
posibility and I think we do that only for innermost loops.
Perhaps also ivopts can be improved to consume less registers for the
vectorized loop body.
Richi, any extra ideas?
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Assembly produced showing register pressure issues.
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Subject: [Bug go/83102] [8 Regression] go bootstrap error in ast-dump.cc due to __is_invocable failure
Date: Wed, 22 Nov 2017 15:19:00 -0000
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--- Comment #8 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Wed Nov 22 15:18:43 2017
New Revision: 255062
URL: https://gcc.gnu.org/viewcvs?rev=255062&root=gcc&view=rev
Log:
compiler: make comparison operator() methods const
This is required for new versions of libstdc++ in C++17 mode.
Fixes GCC PR 83102.
Reviewed-on: https://go-review.googlesource.com/79396
Modified:
trunk/gcc/go/gofrontend/MERGE
trunk/gcc/go/gofrontend/gogo.h
trunk/gcc/go/gofrontend/parse.cc
trunk/gcc/go/gofrontend/parse.h
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Subject: [Bug go/83102] [8 Regression] go bootstrap error in ast-dump.cc due to __is_invocable failure
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Ian Lance Taylor <ian at airs dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Ian Lance Taylor <ian at airs dot com> ---
Should be fixed.
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Subject: [Bug c/83108] Unaligned 128bit dereference causes segfault with -O2 on x86-64
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Plain source file
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Subject: [Bug c/83108] New: Unaligned 128bit dereference causes segfault with -O2 on x86-64
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Bug ID: 83108
Summary: Unaligned 128bit dereference causes segfault with -O2
on x86-64
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Created attachment 42681
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Preprocessed Source file
If I have a __uint128_t *unalignedPtr
Which points to an 8 byte (but not 16 byte) location then
*unalignedPtr = 0;
causes a seg fault on my x86-64 machine using:
gcc (GCC) 7.2.1 20170915 (Red Hat 7.2.1-2)
I'm attaching the example source file and the preprocessed source.
I compile with (to see the problem):
gcc -O2 128alignchk.c -o 128alignchk
I've tried turning on individual optimisation to track down the problem but if
I compile with:
gcc -O1 -fthread-jumps -falign-functions -falign-jumps -falign-loops
-falign-labels -fcaller-saves -fcrossjumping -fcse-follow-jumps
-fcse-skip-blocks -fdelete-null-pointer-checks -fdevirtualize
-fdevirtualize-speculatively -fexpensive-optimizations -fgcse -fgcse-lm
-fhoist-adjacent-loads -finline-small-functions -findirect-inlining -fipa-cp
-fipa-bit-cp -fipa-vrp -fipa-sra -fipa-icf
-fisolate-erroneous-paths-dereference -flra-remat -foptimize-sibling-calls
-foptimize-strlen -fpartial-inlining -fpeephole2 -freorder-blocks-algorithm=stc
-freorder-blocks-and-partition -freorder-functions -frerun-cse-after-loop
-fsched-interblock -fsched-spec -fschedule-insns2 -fstore-merging
-fstrict-aliasing -ftree-builtin-call-dce -ftree-switch-conversion
-ftree-tail-merge -fcode-hoisting -ftree-pre -ftree-vrp -fipa-ra
-fstrict-overflow -fvect-cost-model=cheap 128alignchk.c -o 128alignchk
The resulting binary works fine (even though the output of -Q --help=optimizers
is the same as with -O2).
>From gcc-bugs-return-582712-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 15:27:29 2017
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Subject: [Bug c/83108] Unaligned 128bit dereference causes segfault with -O2 on x86-64
Date: Wed, 22 Nov 2017 15:27:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
unsigned __int128 always needs 16 byte alignement, otherwise you are invoking
undefined behavior.
>From gcc-bugs-return-582713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 15:32:24 2017
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Subject: [Bug c/83108] Unaligned 128bit dereference causes segfault with -O2 on x86-64
Date: Wed, 22 Nov 2017 15:32:00 -0000
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--- Comment #3 from Jon Levell <gcc-bugspam at coralbark dot net> ---
I'm surprised this was closed invalid.
"While the x86 architecture originally did not require aligned memory access,
and still works without it, some SSE2 instructions on x86 CPUs do require the
data to be 128-bit (16-byte) aligned"
I'm not doing anything SSE2 related. I'm surprised this is considered undefined
behaviour?
>From gcc-bugs-return-582714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 15:33:12 2017
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mliska at suse dot cz
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Martin Liska has a patch out for review to fix this warning:
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01763.html
>From gcc-bugs-return-582715-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 15:39:49 2017
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Subject: [Bug c/83108] Unaligned 128bit dereference causes segfault with -O2 on x86-64
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--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Jon Levell from comment #3)
> I'm surprised this was closed invalid.
>
> "While the x86 architecture originally did not require aligned memory
> access, and still works without it, some SSE2 instructions on x86 CPUs do
> require the data to be 128-bit (16-byte) aligned"
>
> I'm not doing anything SSE2 related. I'm surprised this is considered
> undefined behaviour?
It has nothing to do with SSE2. GCC simply assumes that __uint128_t is
16byte alignmented and optimizes accordingly (clang does the same).
>From gcc-bugs-return-582716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 15:41:12 2017
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Subject: [Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)
Date: Wed, 22 Nov 2017 15:41:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
I don't have any good ideas here. Fortran with allocated arrays tends to use
quite some integer registers for all the IV setup and computation.
One can experiment with less peeling of vector epilogues (--param
max-completely-peel-times=1) as well as maybe adding another code sinking pass.
In the end
it's intelligent remat of expressions (during RA) that needs to be done as I
fully expect not having enough integer registers to compute and keep live
everything.
There seems to be missed invariant motion on the GIMPLE side and also
stack allocation in an inner loop which we might be able to hoist. Maybe
that (__builtin_stack_save/restore) confuses RA.
Those builtins confuse LIM at least (a present memcpy does as well, and
we expand that to a libcall). -fno-tree-loop-distribute-patterns helps for
that.
But even then we still spill a lot. Thus, try
-fno-tree-loop-distribute-patterns plus
Index: gcc/tree-ssa-loop-im.c
===================================================================
--- gcc/tree-ssa-loop-im.c (revision 255051)
+++ gcc/tree-ssa-loop-im.c (working copy)
@@ -1432,7 +1432,10 @@ gather_mem_refs_stmt (struct loop *loop,
bool is_stored;
unsigned id;
- if (!gimple_vuse (stmt))
+ if (!gimple_vuse (stmt)
+ || gimple_call_builtin_p (stmt, BUILT_IN_STACK_SAVE)
+ || gimple_call_builtin_p (stmt, BUILT_IN_STACK_RESTORE)
+ || gimple_call_builtin_p (stmt, BUILT_IN_ALLOCA_WITH_ALIGN))
return;
mem = simple_mem_ref_in_stmt (stmt, &is_stored);
>From gcc-bugs-return-582717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 15:47:16 2017
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Subject: [Bug tree-optimization/83007] [8 Regression] -Wstringop-overflow false positive
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #1)
> A common mistake with strncat is to specify as the bound the source of the
> source string (instead of the remaining space in the destination), as in:
That doesn't really make sense to me. If you know the remaining space in the
destination, that would mean also you know the length of the string in the
destination; then you should just use the known location of the '\0' as the
spot to memcpy + termination.
target.c uses strncat for a completely different purpose, which better matches
what the function does - sometimes it wants to copy the whole src string, but
sometimes just a portion of it and that is what is specified by the third
strncat argument.
>From gcc-bugs-return-582718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 15:54:21 2017
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
The warning for strncat helps find similar bugs as for strncpy: defeating the
size constraint by specifying the length of the source rather than the amount
of space in the destination:
strncat (d, s, strlen (s));
This is, of course, equivalent to strcat (d, s) and so an
unnecessary/unintended use of the function. Similar recommendation as for
strncpy also applies to strncat:
strncat (d, s, sizeof d - strlen (d) - 1);
See for example:
https://www.us-cert.gov/bsi/articles/knowledge/coding-practices/strncpy-and-strncat
The GCC code happens to be safe but there's no good way to distinguish safe but
unintended uses from unsafe ones and so the warning errs on the side of
caution.
>From gcc-bugs-return-582719-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:00:50 2017
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Subject: [Bug tree-optimization/83007] [8 Regression] -Wstringop-overflow false positive
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83007
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=83106
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
The target.c use is safe but indistinguishable from the common unsafe use case:
strncat (d, s, strlen (s));
This latter use case is what the warning is designed to help prevent. See also
bug 83106 for some more background.
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/59930] template friend declarations, namespaces, and explicit instantiations don't mix
Date: Wed, 22 Nov 2017 16:01:00 -0000
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--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
When we parse the template friend declaration, we're not injecting an invisible
template decl into the enclosing namespace.
When we instantiate the template we do an unqualified lookup (and ask for
hidden objects) from the enclosing namespace.
In the first testcase, this fails to find anything. Then we explicitly inject
into the global scope, as Richard surmised:
/* The friend template has not already been declared. In this
case, the instantiation of the template class will cause the
injection of this template into the global scope. */
That just seems wrong. Perhaps it was right at some point?
In the second testcase we perform the unqualified lookup, but find the ::B, as
it's declared at the point of the instantiation. So we make it a friend. Bah.
10.3.1.2/3 talks about invisible friend injection, and AFAICT doesn't prohibit
that happening during template parsing time.
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Subject: [Bug tree-optimization/66264] [untaken optimization] switch & enums without default-case
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #5 from Martin Jambor <jamborm at gcc dot gnu.org> ---
So I did not do it, but this is now working as requested in trunk (and I
believe also gcc 7) and switch conversion loads the value from a table.
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #3)
> The warning for strncat helps find similar bugs as for strncpy: defeating
> the size constraint by specifying the length of the source rather than the
> amount of space in the destination:
>
> strncat (d, s, strlen (s));
>
> This is, of course, equivalent to strcat (d, s) and so an
> unnecessary/unintended use of the function. Similar recommendation as for
> strncpy also applies to strncat:
>
> strncat (d, s, sizeof d - strlen (d) - 1);
>
> See for example:
> https://www.us-cert.gov/bsi/articles/knowledge/coding-practices/strncpy-and-
> strncat
>
> The GCC code happens to be safe but there's no good way to distinguish safe
> but unintended uses from unsafe ones and so the warning errs on the side of
> caution.
Only if you misuse strncat for something it has not been designed for.
If you already compute strlen (d), it makes no sense to use a function that
needs to compute it again.
See e.g. https://en.wikipedia.org/wiki/C_string_handling on what it says about
these functions. target.c uses strncat properly, trying to use it for security
purposes of not overflowing destination is typically just a bug.
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Subject: [Bug c++/82401] [8 Regression] error: qsort comparator non-negative on sorted output: 1 in insert_late_enum_def_bindings on an invalid code
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-22
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42683
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42683&action=edit
gcc8-pr82401.patch
Untested fix.
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Subject: [Bug middle-end/67239] [6 Regression] FAIL: 23_containers/unordered_set/insert/hash_policy.cc execution test
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--- Comment #31 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Nov 22 16:06:18 2017
New Revision: 255066
URL: https://gcc.gnu.org/viewcvs?rev=255066&root=gcc&view=rev
Log:
PR c++/60336
PR middle-end/67239
PR target/68355
* c-decl.c (grokdeclarator): Set DECL_PADDING_P on unnamed bit-fields.
* class.c (layout_class_type): Set DECL_PADDING_P on padding.
* decl.c (cxx_init_decl_processing): Set TRANSLATION_UNIT_WARN_EMPTY_P.
(grokdeclarator): Set DECL_PADDING_P on unnamed bit-fields.
* lto.c (compare_tree_sccs_1): Compare TYPE_EMPTY_P and DECL_PADDING_P.
* calls.c (initialize_argument_information): Call
warn_parameter_passing_abi target hook.
(store_one_arg): Use 0 for empty record size. Don't push 0 size
argument onto stack.
(must_pass_in_stack_var_size_or_pad): Return false for empty types.
* common.opt: Update -fabi-version description.
* config/i386/i386.c (init_cumulative_args): Set cum->warn_empty.
(ix86_gimplify_va_arg): Call arg_int_size_in_bytes instead of
int_size_in_bytes.
(ix86_is_empty_record): New function.
(ix86_warn_parameter_passing_abi): New function.
(TARGET_EMPTY_RECORD_P): Redefine.
(TARGET_WARN_PARAMETER_PASSING_ABI): Redefine.
* config/i386/i386.h (CUMULATIVE_ARGS): Add warn_empty.
* doc/tm.texi: Regenerated.
* doc/tm.texi.in (TARGET_EMPTY_RECORD_P,
TARGET_WARN_PARAMETER_PASSING_ABI): Add.
* dwarf2out.c (get_ultimate_context): Move to tree.c.
* explow.c (hard_function_value): Call arg_int_size_in_bytes
instead of int_size_in_bytes.
* expr.c (copy_blkmode_to_reg): Likewise.
* function.c (aggregate_value_p): Return 0 for empty types.
(assign_parm_find_entry_rtl): Call warn_parameter_passing_abi target
hook.
(locate_and_pad_parm): Call arg size_in_bytes instead
size_in_bytes.
* lto-streamer-out.c (hash_tree): Hash TYPE_EMPTY_P and DECL_PADDING_P.
* stor-layout.c (finalize_type_size): Set TYPE_EMPTY_P.
* target.def (empty_record_p, warn_parameter_passing_abi): New target
hooks.
* targhooks.c (hook_void_CUMULATIVE_ARGS_tree): New hook.
(std_gimplify_va_arg_expr): Skip empty records. Call
arg_size_in_bytes instead size_in_bytes.
* targhooks.h (hook_void_CUMULATIVE_ARGS_tree): Declare.
* tree-core.h (tree_type_common): Add empty_flag.
(tree_decl_common): Update comments.
* tree-streamer-in.c (unpack_ts_decl_common_value_fields): Stream
DECL_PADDING_P.
(unpack_ts_type_common_value_fields): Stream TYPE_EMPTY_P.
* tree-streamer-out.c (pack_ts_decl_common_value_fields): Stream
DECL_PADDING_P.
(pack_ts_type_common_value_fields): Stream TYPE_EMPTY_P.
* tree.c (default_is_empty_type): New function.
(default_is_empty_record): New function.
(arg_int_size_in_bytes): New function.
(arg_size_in_bytes): New function.
(get_ultimate_context): New function.
* tree.h: Define TYPE_EMPTY_P, DECL_PADDING_P and
TRANSLATION_UNIT_WARN_EMPTY_P.
(default_is_empty_record, arg_int_size_in_bytes,
arg_size_in_bytes, get_ultimate_context): Declare.
* g++.dg/abi/empty12.C: New test.
* g++.dg/abi/empty12.h: New test.
* g++.dg/abi/empty12a.c: New test.
* g++.dg/abi/empty13.C: New test.
* g++.dg/abi/empty13.h: New test.
* g++.dg/abi/empty13a.c: New test.
* g++.dg/abi/empty14.C: New test.
* g++.dg/abi/empty14.h: New test.
* g++.dg/abi/empty14a.c: New test.
* g++.dg/abi/empty15.C: New test.
* g++.dg/abi/empty15.h: New test.
* g++.dg/abi/empty15a.c: New test.
* g++.dg/abi/empty16.C: New test.
* g++.dg/abi/empty16.h: New test.
* g++.dg/abi/empty16a.c: New test.
* g++.dg/abi/empty17.C: New test.
* g++.dg/abi/empty17.h: New test.
* g++.dg/abi/empty17a.c: New test.
* g++.dg/abi/empty18.C: New test.
* g++.dg/abi/empty18.h: New test.
* g++.dg/abi/empty18a.c: New test.
* g++.dg/abi/empty19.C: New test.
* g++.dg/abi/empty19.h: New test.
* g++.dg/abi/empty19a.c: New test.
* g++.dg/abi/empty20.C: New test.
* g++.dg/abi/empty21.C: New test.
* g++.dg/abi/empty22.C: New test.
* g++.dg/abi/empty22.h: New test.
* g++.dg/abi/empty22a.c: New test.
* g++.dg/abi/empty23.C: New test.
* g++.dg/abi/empty24.C: New test.
* g++.dg/abi/empty25.C: New test.
* g++.dg/abi/empty25.h: New test.
* g++.dg/abi/empty25a.c: New test.
* g++.dg/abi/empty26.C: New test.
* g++.dg/abi/empty26.h: New test.
* g++.dg/abi/empty26a.c: New test.
* g++.dg/abi/empty27.C: New test.
* g++.dg/abi/empty28.C: New test.
* g++.dg/abi/pr60336-1.C: New test.
* g++.dg/abi/pr60336-10.C: New test.
* g++.dg/abi/pr60336-11.C: New test.
* g++.dg/abi/pr60336-12.C: New test.
* g++.dg/abi/pr60336-2.C: New test.
* g++.dg/abi/pr60336-3.C: New test.
* g++.dg/abi/pr60336-4.C: New test.
* g++.dg/abi/pr60336-5.C: New test.
* g++.dg/abi/pr60336-6.C: New test.
* g++.dg/abi/pr60336-7.C: New test.
* g++.dg/abi/pr60336-8.C: New test.
* g++.dg/abi/pr60336-9.C: New test.
* g++.dg/abi/pr68355.C: New test.
* g++.dg/lto/pr60336_0.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/abi/empty12.C
trunk/gcc/testsuite/g++.dg/abi/empty12.h
trunk/gcc/testsuite/g++.dg/abi/empty12a.c
trunk/gcc/testsuite/g++.dg/abi/empty13.C
trunk/gcc/testsuite/g++.dg/abi/empty13.h
trunk/gcc/testsuite/g++.dg/abi/empty13a.c
trunk/gcc/testsuite/g++.dg/abi/empty14.C
trunk/gcc/testsuite/g++.dg/abi/empty14.h
trunk/gcc/testsuite/g++.dg/abi/empty14a.c
trunk/gcc/testsuite/g++.dg/abi/empty15.C
trunk/gcc/testsuite/g++.dg/abi/empty15.h
trunk/gcc/testsuite/g++.dg/abi/empty15a.c
trunk/gcc/testsuite/g++.dg/abi/empty16.C
trunk/gcc/testsuite/g++.dg/abi/empty16.h
trunk/gcc/testsuite/g++.dg/abi/empty16a.c
trunk/gcc/testsuite/g++.dg/abi/empty17.C
trunk/gcc/testsuite/g++.dg/abi/empty17.h
trunk/gcc/testsuite/g++.dg/abi/empty17a.c
trunk/gcc/testsuite/g++.dg/abi/empty18.C
trunk/gcc/testsuite/g++.dg/abi/empty18.h
trunk/gcc/testsuite/g++.dg/abi/empty18a.c
trunk/gcc/testsuite/g++.dg/abi/empty19.C
trunk/gcc/testsuite/g++.dg/abi/empty19.h
trunk/gcc/testsuite/g++.dg/abi/empty19a.c
trunk/gcc/testsuite/g++.dg/abi/empty20.C
trunk/gcc/testsuite/g++.dg/abi/empty21.C
trunk/gcc/testsuite/g++.dg/abi/empty22.C
trunk/gcc/testsuite/g++.dg/abi/empty22.h
trunk/gcc/testsuite/g++.dg/abi/empty22a.c
trunk/gcc/testsuite/g++.dg/abi/empty23.C
trunk/gcc/testsuite/g++.dg/abi/empty24.C
trunk/gcc/testsuite/g++.dg/abi/empty25.C
trunk/gcc/testsuite/g++.dg/abi/empty25.h
trunk/gcc/testsuite/g++.dg/abi/empty25a.c
trunk/gcc/testsuite/g++.dg/abi/empty26.C
trunk/gcc/testsuite/g++.dg/abi/empty26.h
trunk/gcc/testsuite/g++.dg/abi/empty26a.c
trunk/gcc/testsuite/g++.dg/abi/empty27.C
trunk/gcc/testsuite/g++.dg/abi/empty28.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-1.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-10.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-11.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-12.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-2.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-3.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-4.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-5.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-6.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-7.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-8.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-9.C
trunk/gcc/testsuite/g++.dg/abi/pr68355.C
trunk/gcc/testsuite/g++.dg/lto/pr60336_0.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/calls.c
trunk/gcc/common.opt
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/i386.h
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/cp/decl.c
trunk/gcc/doc/tm.texi
trunk/gcc/doc/tm.texi.in
trunk/gcc/dwarf2out.c
trunk/gcc/explow.c
trunk/gcc/expr.c
trunk/gcc/function.c
trunk/gcc/lto-streamer-out.c
trunk/gcc/lto/ChangeLog
trunk/gcc/lto/lto.c
trunk/gcc/stor-layout.c
trunk/gcc/target.def
trunk/gcc/targhooks.c
trunk/gcc/targhooks.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-core.h
trunk/gcc/tree-streamer-in.c
trunk/gcc/tree-streamer-out.c
trunk/gcc/tree.c
trunk/gcc/tree.h
>From gcc-bugs-return-582725-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:07:00 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/60336] empty struct value is passed differently in C and C++
Date: Wed, 22 Nov 2017 16:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60336
--- Comment #50 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Nov 22 16:06:18 2017
New Revision: 255066
URL: https://gcc.gnu.org/viewcvs?rev=255066&root=gcc&view=rev
Log:
PR c++/60336
PR middle-end/67239
PR target/68355
* c-decl.c (grokdeclarator): Set DECL_PADDING_P on unnamed bit-fields.
* class.c (layout_class_type): Set DECL_PADDING_P on padding.
* decl.c (cxx_init_decl_processing): Set TRANSLATION_UNIT_WARN_EMPTY_P.
(grokdeclarator): Set DECL_PADDING_P on unnamed bit-fields.
* lto.c (compare_tree_sccs_1): Compare TYPE_EMPTY_P and DECL_PADDING_P.
* calls.c (initialize_argument_information): Call
warn_parameter_passing_abi target hook.
(store_one_arg): Use 0 for empty record size. Don't push 0 size
argument onto stack.
(must_pass_in_stack_var_size_or_pad): Return false for empty types.
* common.opt: Update -fabi-version description.
* config/i386/i386.c (init_cumulative_args): Set cum->warn_empty.
(ix86_gimplify_va_arg): Call arg_int_size_in_bytes instead of
int_size_in_bytes.
(ix86_is_empty_record): New function.
(ix86_warn_parameter_passing_abi): New function.
(TARGET_EMPTY_RECORD_P): Redefine.
(TARGET_WARN_PARAMETER_PASSING_ABI): Redefine.
* config/i386/i386.h (CUMULATIVE_ARGS): Add warn_empty.
* doc/tm.texi: Regenerated.
* doc/tm.texi.in (TARGET_EMPTY_RECORD_P,
TARGET_WARN_PARAMETER_PASSING_ABI): Add.
* dwarf2out.c (get_ultimate_context): Move to tree.c.
* explow.c (hard_function_value): Call arg_int_size_in_bytes
instead of int_size_in_bytes.
* expr.c (copy_blkmode_to_reg): Likewise.
* function.c (aggregate_value_p): Return 0 for empty types.
(assign_parm_find_entry_rtl): Call warn_parameter_passing_abi target
hook.
(locate_and_pad_parm): Call arg size_in_bytes instead
size_in_bytes.
* lto-streamer-out.c (hash_tree): Hash TYPE_EMPTY_P and DECL_PADDING_P.
* stor-layout.c (finalize_type_size): Set TYPE_EMPTY_P.
* target.def (empty_record_p, warn_parameter_passing_abi): New target
hooks.
* targhooks.c (hook_void_CUMULATIVE_ARGS_tree): New hook.
(std_gimplify_va_arg_expr): Skip empty records. Call
arg_size_in_bytes instead size_in_bytes.
* targhooks.h (hook_void_CUMULATIVE_ARGS_tree): Declare.
* tree-core.h (tree_type_common): Add empty_flag.
(tree_decl_common): Update comments.
* tree-streamer-in.c (unpack_ts_decl_common_value_fields): Stream
DECL_PADDING_P.
(unpack_ts_type_common_value_fields): Stream TYPE_EMPTY_P.
* tree-streamer-out.c (pack_ts_decl_common_value_fields): Stream
DECL_PADDING_P.
(pack_ts_type_common_value_fields): Stream TYPE_EMPTY_P.
* tree.c (default_is_empty_type): New function.
(default_is_empty_record): New function.
(arg_int_size_in_bytes): New function.
(arg_size_in_bytes): New function.
(get_ultimate_context): New function.
* tree.h: Define TYPE_EMPTY_P, DECL_PADDING_P and
TRANSLATION_UNIT_WARN_EMPTY_P.
(default_is_empty_record, arg_int_size_in_bytes,
arg_size_in_bytes, get_ultimate_context): Declare.
* g++.dg/abi/empty12.C: New test.
* g++.dg/abi/empty12.h: New test.
* g++.dg/abi/empty12a.c: New test.
* g++.dg/abi/empty13.C: New test.
* g++.dg/abi/empty13.h: New test.
* g++.dg/abi/empty13a.c: New test.
* g++.dg/abi/empty14.C: New test.
* g++.dg/abi/empty14.h: New test.
* g++.dg/abi/empty14a.c: New test.
* g++.dg/abi/empty15.C: New test.
* g++.dg/abi/empty15.h: New test.
* g++.dg/abi/empty15a.c: New test.
* g++.dg/abi/empty16.C: New test.
* g++.dg/abi/empty16.h: New test.
* g++.dg/abi/empty16a.c: New test.
* g++.dg/abi/empty17.C: New test.
* g++.dg/abi/empty17.h: New test.
* g++.dg/abi/empty17a.c: New test.
* g++.dg/abi/empty18.C: New test.
* g++.dg/abi/empty18.h: New test.
* g++.dg/abi/empty18a.c: New test.
* g++.dg/abi/empty19.C: New test.
* g++.dg/abi/empty19.h: New test.
* g++.dg/abi/empty19a.c: New test.
* g++.dg/abi/empty20.C: New test.
* g++.dg/abi/empty21.C: New test.
* g++.dg/abi/empty22.C: New test.
* g++.dg/abi/empty22.h: New test.
* g++.dg/abi/empty22a.c: New test.
* g++.dg/abi/empty23.C: New test.
* g++.dg/abi/empty24.C: New test.
* g++.dg/abi/empty25.C: New test.
* g++.dg/abi/empty25.h: New test.
* g++.dg/abi/empty25a.c: New test.
* g++.dg/abi/empty26.C: New test.
* g++.dg/abi/empty26.h: New test.
* g++.dg/abi/empty26a.c: New test.
* g++.dg/abi/empty27.C: New test.
* g++.dg/abi/empty28.C: New test.
* g++.dg/abi/pr60336-1.C: New test.
* g++.dg/abi/pr60336-10.C: New test.
* g++.dg/abi/pr60336-11.C: New test.
* g++.dg/abi/pr60336-12.C: New test.
* g++.dg/abi/pr60336-2.C: New test.
* g++.dg/abi/pr60336-3.C: New test.
* g++.dg/abi/pr60336-4.C: New test.
* g++.dg/abi/pr60336-5.C: New test.
* g++.dg/abi/pr60336-6.C: New test.
* g++.dg/abi/pr60336-7.C: New test.
* g++.dg/abi/pr60336-8.C: New test.
* g++.dg/abi/pr60336-9.C: New test.
* g++.dg/abi/pr68355.C: New test.
* g++.dg/lto/pr60336_0.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/abi/empty12.C
trunk/gcc/testsuite/g++.dg/abi/empty12.h
trunk/gcc/testsuite/g++.dg/abi/empty12a.c
trunk/gcc/testsuite/g++.dg/abi/empty13.C
trunk/gcc/testsuite/g++.dg/abi/empty13.h
trunk/gcc/testsuite/g++.dg/abi/empty13a.c
trunk/gcc/testsuite/g++.dg/abi/empty14.C
trunk/gcc/testsuite/g++.dg/abi/empty14.h
trunk/gcc/testsuite/g++.dg/abi/empty14a.c
trunk/gcc/testsuite/g++.dg/abi/empty15.C
trunk/gcc/testsuite/g++.dg/abi/empty15.h
trunk/gcc/testsuite/g++.dg/abi/empty15a.c
trunk/gcc/testsuite/g++.dg/abi/empty16.C
trunk/gcc/testsuite/g++.dg/abi/empty16.h
trunk/gcc/testsuite/g++.dg/abi/empty16a.c
trunk/gcc/testsuite/g++.dg/abi/empty17.C
trunk/gcc/testsuite/g++.dg/abi/empty17.h
trunk/gcc/testsuite/g++.dg/abi/empty17a.c
trunk/gcc/testsuite/g++.dg/abi/empty18.C
trunk/gcc/testsuite/g++.dg/abi/empty18.h
trunk/gcc/testsuite/g++.dg/abi/empty18a.c
trunk/gcc/testsuite/g++.dg/abi/empty19.C
trunk/gcc/testsuite/g++.dg/abi/empty19.h
trunk/gcc/testsuite/g++.dg/abi/empty19a.c
trunk/gcc/testsuite/g++.dg/abi/empty20.C
trunk/gcc/testsuite/g++.dg/abi/empty21.C
trunk/gcc/testsuite/g++.dg/abi/empty22.C
trunk/gcc/testsuite/g++.dg/abi/empty22.h
trunk/gcc/testsuite/g++.dg/abi/empty22a.c
trunk/gcc/testsuite/g++.dg/abi/empty23.C
trunk/gcc/testsuite/g++.dg/abi/empty24.C
trunk/gcc/testsuite/g++.dg/abi/empty25.C
trunk/gcc/testsuite/g++.dg/abi/empty25.h
trunk/gcc/testsuite/g++.dg/abi/empty25a.c
trunk/gcc/testsuite/g++.dg/abi/empty26.C
trunk/gcc/testsuite/g++.dg/abi/empty26.h
trunk/gcc/testsuite/g++.dg/abi/empty26a.c
trunk/gcc/testsuite/g++.dg/abi/empty27.C
trunk/gcc/testsuite/g++.dg/abi/empty28.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-1.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-10.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-11.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-12.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-2.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-3.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-4.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-5.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-6.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-7.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-8.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-9.C
trunk/gcc/testsuite/g++.dg/abi/pr68355.C
trunk/gcc/testsuite/g++.dg/lto/pr60336_0.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/calls.c
trunk/gcc/common.opt
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/i386.h
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/cp/decl.c
trunk/gcc/doc/tm.texi
trunk/gcc/doc/tm.texi.in
trunk/gcc/dwarf2out.c
trunk/gcc/explow.c
trunk/gcc/expr.c
trunk/gcc/function.c
trunk/gcc/lto-streamer-out.c
trunk/gcc/lto/ChangeLog
trunk/gcc/lto/lto.c
trunk/gcc/stor-layout.c
trunk/gcc/target.def
trunk/gcc/targhooks.c
trunk/gcc/targhooks.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-core.h
trunk/gcc/tree-streamer-in.c
trunk/gcc/tree-streamer-out.c
trunk/gcc/tree.c
trunk/gcc/tree.h
>From gcc-bugs-return-582726-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:07:00 2017
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/68355] C++ constexpr is passed on stack
Date: Wed, 22 Nov 2017 16:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68355
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Nov 22 16:06:18 2017
New Revision: 255066
URL: https://gcc.gnu.org/viewcvs?rev=255066&root=gcc&view=rev
Log:
PR c++/60336
PR middle-end/67239
PR target/68355
* c-decl.c (grokdeclarator): Set DECL_PADDING_P on unnamed bit-fields.
* class.c (layout_class_type): Set DECL_PADDING_P on padding.
* decl.c (cxx_init_decl_processing): Set TRANSLATION_UNIT_WARN_EMPTY_P.
(grokdeclarator): Set DECL_PADDING_P on unnamed bit-fields.
* lto.c (compare_tree_sccs_1): Compare TYPE_EMPTY_P and DECL_PADDING_P.
* calls.c (initialize_argument_information): Call
warn_parameter_passing_abi target hook.
(store_one_arg): Use 0 for empty record size. Don't push 0 size
argument onto stack.
(must_pass_in_stack_var_size_or_pad): Return false for empty types.
* common.opt: Update -fabi-version description.
* config/i386/i386.c (init_cumulative_args): Set cum->warn_empty.
(ix86_gimplify_va_arg): Call arg_int_size_in_bytes instead of
int_size_in_bytes.
(ix86_is_empty_record): New function.
(ix86_warn_parameter_passing_abi): New function.
(TARGET_EMPTY_RECORD_P): Redefine.
(TARGET_WARN_PARAMETER_PASSING_ABI): Redefine.
* config/i386/i386.h (CUMULATIVE_ARGS): Add warn_empty.
* doc/tm.texi: Regenerated.
* doc/tm.texi.in (TARGET_EMPTY_RECORD_P,
TARGET_WARN_PARAMETER_PASSING_ABI): Add.
* dwarf2out.c (get_ultimate_context): Move to tree.c.
* explow.c (hard_function_value): Call arg_int_size_in_bytes
instead of int_size_in_bytes.
* expr.c (copy_blkmode_to_reg): Likewise.
* function.c (aggregate_value_p): Return 0 for empty types.
(assign_parm_find_entry_rtl): Call warn_parameter_passing_abi target
hook.
(locate_and_pad_parm): Call arg size_in_bytes instead
size_in_bytes.
* lto-streamer-out.c (hash_tree): Hash TYPE_EMPTY_P and DECL_PADDING_P.
* stor-layout.c (finalize_type_size): Set TYPE_EMPTY_P.
* target.def (empty_record_p, warn_parameter_passing_abi): New target
hooks.
* targhooks.c (hook_void_CUMULATIVE_ARGS_tree): New hook.
(std_gimplify_va_arg_expr): Skip empty records. Call
arg_size_in_bytes instead size_in_bytes.
* targhooks.h (hook_void_CUMULATIVE_ARGS_tree): Declare.
* tree-core.h (tree_type_common): Add empty_flag.
(tree_decl_common): Update comments.
* tree-streamer-in.c (unpack_ts_decl_common_value_fields): Stream
DECL_PADDING_P.
(unpack_ts_type_common_value_fields): Stream TYPE_EMPTY_P.
* tree-streamer-out.c (pack_ts_decl_common_value_fields): Stream
DECL_PADDING_P.
(pack_ts_type_common_value_fields): Stream TYPE_EMPTY_P.
* tree.c (default_is_empty_type): New function.
(default_is_empty_record): New function.
(arg_int_size_in_bytes): New function.
(arg_size_in_bytes): New function.
(get_ultimate_context): New function.
* tree.h: Define TYPE_EMPTY_P, DECL_PADDING_P and
TRANSLATION_UNIT_WARN_EMPTY_P.
(default_is_empty_record, arg_int_size_in_bytes,
arg_size_in_bytes, get_ultimate_context): Declare.
* g++.dg/abi/empty12.C: New test.
* g++.dg/abi/empty12.h: New test.
* g++.dg/abi/empty12a.c: New test.
* g++.dg/abi/empty13.C: New test.
* g++.dg/abi/empty13.h: New test.
* g++.dg/abi/empty13a.c: New test.
* g++.dg/abi/empty14.C: New test.
* g++.dg/abi/empty14.h: New test.
* g++.dg/abi/empty14a.c: New test.
* g++.dg/abi/empty15.C: New test.
* g++.dg/abi/empty15.h: New test.
* g++.dg/abi/empty15a.c: New test.
* g++.dg/abi/empty16.C: New test.
* g++.dg/abi/empty16.h: New test.
* g++.dg/abi/empty16a.c: New test.
* g++.dg/abi/empty17.C: New test.
* g++.dg/abi/empty17.h: New test.
* g++.dg/abi/empty17a.c: New test.
* g++.dg/abi/empty18.C: New test.
* g++.dg/abi/empty18.h: New test.
* g++.dg/abi/empty18a.c: New test.
* g++.dg/abi/empty19.C: New test.
* g++.dg/abi/empty19.h: New test.
* g++.dg/abi/empty19a.c: New test.
* g++.dg/abi/empty20.C: New test.
* g++.dg/abi/empty21.C: New test.
* g++.dg/abi/empty22.C: New test.
* g++.dg/abi/empty22.h: New test.
* g++.dg/abi/empty22a.c: New test.
* g++.dg/abi/empty23.C: New test.
* g++.dg/abi/empty24.C: New test.
* g++.dg/abi/empty25.C: New test.
* g++.dg/abi/empty25.h: New test.
* g++.dg/abi/empty25a.c: New test.
* g++.dg/abi/empty26.C: New test.
* g++.dg/abi/empty26.h: New test.
* g++.dg/abi/empty26a.c: New test.
* g++.dg/abi/empty27.C: New test.
* g++.dg/abi/empty28.C: New test.
* g++.dg/abi/pr60336-1.C: New test.
* g++.dg/abi/pr60336-10.C: New test.
* g++.dg/abi/pr60336-11.C: New test.
* g++.dg/abi/pr60336-12.C: New test.
* g++.dg/abi/pr60336-2.C: New test.
* g++.dg/abi/pr60336-3.C: New test.
* g++.dg/abi/pr60336-4.C: New test.
* g++.dg/abi/pr60336-5.C: New test.
* g++.dg/abi/pr60336-6.C: New test.
* g++.dg/abi/pr60336-7.C: New test.
* g++.dg/abi/pr60336-8.C: New test.
* g++.dg/abi/pr60336-9.C: New test.
* g++.dg/abi/pr68355.C: New test.
* g++.dg/lto/pr60336_0.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/abi/empty12.C
trunk/gcc/testsuite/g++.dg/abi/empty12.h
trunk/gcc/testsuite/g++.dg/abi/empty12a.c
trunk/gcc/testsuite/g++.dg/abi/empty13.C
trunk/gcc/testsuite/g++.dg/abi/empty13.h
trunk/gcc/testsuite/g++.dg/abi/empty13a.c
trunk/gcc/testsuite/g++.dg/abi/empty14.C
trunk/gcc/testsuite/g++.dg/abi/empty14.h
trunk/gcc/testsuite/g++.dg/abi/empty14a.c
trunk/gcc/testsuite/g++.dg/abi/empty15.C
trunk/gcc/testsuite/g++.dg/abi/empty15.h
trunk/gcc/testsuite/g++.dg/abi/empty15a.c
trunk/gcc/testsuite/g++.dg/abi/empty16.C
trunk/gcc/testsuite/g++.dg/abi/empty16.h
trunk/gcc/testsuite/g++.dg/abi/empty16a.c
trunk/gcc/testsuite/g++.dg/abi/empty17.C
trunk/gcc/testsuite/g++.dg/abi/empty17.h
trunk/gcc/testsuite/g++.dg/abi/empty17a.c
trunk/gcc/testsuite/g++.dg/abi/empty18.C
trunk/gcc/testsuite/g++.dg/abi/empty18.h
trunk/gcc/testsuite/g++.dg/abi/empty18a.c
trunk/gcc/testsuite/g++.dg/abi/empty19.C
trunk/gcc/testsuite/g++.dg/abi/empty19.h
trunk/gcc/testsuite/g++.dg/abi/empty19a.c
trunk/gcc/testsuite/g++.dg/abi/empty20.C
trunk/gcc/testsuite/g++.dg/abi/empty21.C
trunk/gcc/testsuite/g++.dg/abi/empty22.C
trunk/gcc/testsuite/g++.dg/abi/empty22.h
trunk/gcc/testsuite/g++.dg/abi/empty22a.c
trunk/gcc/testsuite/g++.dg/abi/empty23.C
trunk/gcc/testsuite/g++.dg/abi/empty24.C
trunk/gcc/testsuite/g++.dg/abi/empty25.C
trunk/gcc/testsuite/g++.dg/abi/empty25.h
trunk/gcc/testsuite/g++.dg/abi/empty25a.c
trunk/gcc/testsuite/g++.dg/abi/empty26.C
trunk/gcc/testsuite/g++.dg/abi/empty26.h
trunk/gcc/testsuite/g++.dg/abi/empty26a.c
trunk/gcc/testsuite/g++.dg/abi/empty27.C
trunk/gcc/testsuite/g++.dg/abi/empty28.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-1.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-10.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-11.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-12.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-2.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-3.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-4.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-5.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-6.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-7.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-8.C
trunk/gcc/testsuite/g++.dg/abi/pr60336-9.C
trunk/gcc/testsuite/g++.dg/abi/pr68355.C
trunk/gcc/testsuite/g++.dg/lto/pr60336_0.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/calls.c
trunk/gcc/common.opt
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/i386.h
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/cp/decl.c
trunk/gcc/doc/tm.texi
trunk/gcc/doc/tm.texi.in
trunk/gcc/dwarf2out.c
trunk/gcc/explow.c
trunk/gcc/expr.c
trunk/gcc/function.c
trunk/gcc/lto-streamer-out.c
trunk/gcc/lto/ChangeLog
trunk/gcc/lto/lto.c
trunk/gcc/stor-layout.c
trunk/gcc/target.def
trunk/gcc/targhooks.c
trunk/gcc/targhooks.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-core.h
trunk/gcc/tree-streamer-in.c
trunk/gcc/tree-streamer-out.c
trunk/gcc/tree.c
trunk/gcc/tree.h
>From gcc-bugs-return-582728-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:09:48 2017
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Subject: [Bug c/53871] Please warn about endless loops if they are obvious
Date: Wed, 22 Nov 2017 16:09:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |david at westcontrol dot com
--- Comment #9 from Eric Gallager <egallager at gcc dot gnu.org> ---
*** Bug 80872 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-582727-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:09:46 2017
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Subject: [Bug c/80872] There is no warning on accidental infinite loops
Date: Wed, 22 Nov 2017 16:09:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|SUSPENDED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #1)
> Confirmed that such a warning would be nice to have, but probably impossible
> to implement properly due to the halting problem. Thus setting status to
> SUSPENDED.
actually this is probably a dup of bug 53871
*** This bug has been marked as a duplicate of bug 53871 ***
>From gcc-bugs-return-582730-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:09:52 2017
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Subject: [Bug target/68355] C++ constexpr is passed on stack
Date: Wed, 22 Nov 2017 16:09:00 -0000
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Bug 68355 depends on bug 60336, which changed state.
Bug 60336 Summary: empty struct value is passed differently in C and C++
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60336
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-582732-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:10:01 2017
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |mpolacek at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
>From gcc-bugs-return-582733-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:10:22 2017
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #32 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Should be fixed for GCC 8.
>From gcc-bugs-return-582731-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:09:56 2017
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Bug 67239 depends on bug 60336, which changed state.
Bug 60336 Summary: empty struct value is passed differently in C and C++
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60336
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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>From gcc-bugs-return-582729-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:09:50 2017
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #51 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Implemented for GCC 8.
>From gcc-bugs-return-582734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:15:09 2017
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Subject: [Bug target/83109] New: [CET] improper code generation for builtin_longjmp with -fcf-protection -mcet
Date: Wed, 22 Nov 2017 16:15:00 -0000
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Bug ID: 83109
Summary: [CET] improper code generation for builtin_longjmp
with -fcf-protection -mcet
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Reporter: igor.v.tsimbalist at intel dot com
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As inssp instruction adust the shadow stack pointer (ssp) only by value in the
range of [0..255] there should be a loop generated to adjust ssp if the value
greater then 255.
Currently builtin_longjmp does one time adjustment with incssp.
>From gcc-bugs-return-582735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:20:43 2017
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Subject: =?UTF-8?B?W0J1ZyBsaWJnb21wLzgzMTA2XSBbOCByZWdyZXNzaW9uXSBsaWJnb21wL3Rh?= =?UTF-8?B?cmdldC5jOjI2NzE6MjogZXJyb3I6IOKAmHN0cm5jYXTigJkgc3BlY2lmaWVk?= =?UTF-8?B?IGJvdW5kIDUgZXF1YWxzIHNvdXJjZSBsZW5ndGggWy1XZXJyb3I9c3RyaW5n?= =?UTF-8?B?b3Atb3ZlcmZsb3c9XQ==?Date: Wed, 22 Nov 2017 16:20:00 -0000
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Yes, exactly. It's these unintended uses that are a common problem and that
the warning is designed to help prevent. They are rare in carefully written
code bases like GCC but more common in software developed by less experienced
programmers. Often they come up as code is being updated to comply with a
security policy (e.g., replace all strcpy/strcat calls with "safe bounded
functions"). The warning tries to avoid triggering for the safe uses where it
can but there is, unfortunately, not always a good way to do that.
>From gcc-bugs-return-582736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:26:42 2017
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Subject: [Bug target/82268] [8 regression] i386/pr82196-1.c fail
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|wrong-code |
Status|UNCONFIRMED |RESOLVED
CC| |jakub at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-582737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:27:51 2017
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Subject: [Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)
Date: Wed, 22 Nov 2017 16:27:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
CC| |amker.cheng at gmail dot com,
| |vmakarov at redhat dot com
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--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Adding Vladimir and Bin to CC. Perhaps they will have some ideas.
I think stack store/restore is not too confusing for RA (it would be nice to
get rid of it completely and get frame pointer back).
>From gcc-bugs-return-582738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:33:51 2017
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
Date: Wed, 22 Nov 2017 16:33:00 -0000
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--- Comment #2 from seurer at gcc dot gnu.org ---
The specific revision this starts failing with is 254888.
>From gcc-bugs-return-582740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:38:29 2017
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-22
Ever confirmed|0 |1
>From gcc-bugs-return-582739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:38:17 2017
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
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--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to seurer from comment #2)
> The specific revision this starts failing with is 254888.
This is r254888.
>From gcc-bugs-return-582741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:39:12 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
Date: Wed, 22 Nov 2017 16:39:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I confirm the results in comment 0 with revisions r254869 and r255053, except I
get 'always zero' with 'unrolled do-loop' and '-O1'.
With revision r254940, the 'unrolled do-loop' is parallelized with '-O1',
'-O2', and '-Ofast' only, with a wrong result for '-O1'. The other tests are
parallelized with '-O1' and '-O2' only, with a wrong result in both cases.
For all revisions the 'unrolled do-loop' is parallelized with
'-ftree-parallelize-loops=4 -Ofast' only, with the right result.
>From gcc-bugs-return-582742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:40:56 2017
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From: "yyc1992 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83110] New: Relocation error when taking address of protected function in shared library.
Date: Wed, 22 Nov 2017 16:40:00 -0000
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Bug ID: 83110
Summary: Relocation error when taking address of protected
function in shared library.
Product: gcc
Version: 7.2.0
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This is very similar to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65248
although that one is marked as fixed.
(This could be a dup of https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19520 but
I can't really tell...)
The difference from https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65248 is that
this now only happens for me with protected functions and not global variables.
The code to reproduce is
```
__attribute__((visibility("protected")))
void f()
{
}
// __attribute__((visibility("protected")))
// int f;
void f2(void (*cb)(void*))
{
cb((void*)&f);
}
```
Which gives the error
```
% LANG=C g++ a.cpp -o liba.so -pthread -fPIC -shared
/bin/ld: /tmp/ccvUACGZ.o: relocation R_X86_64_PC32 against protected symbol
`_Z1fv' can not be used when making a shared object
/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
```
>From gcc-bugs-return-582743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:44:30 2017
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83111] New: [sh] stack smashing detected in gen_udivsi3
Date: Wed, 22 Nov 2017 16:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83111
Bug ID: 83111
Summary: [sh] stack smashing detected in gen_udivsi3
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
During a sh-linux-gnu build, I run into a build breaker:
...
sh/build/./gcc/xgcc -Bsh/build/./gcc/ -Bsh/install/sh-linux-gnu/bin/
-Bsh/install/sh-linux-gnu/lib/ -isystem sh/install/sh-linux-gnu/include
-isystem sh/install/sh-linux-gnu/sys-include -g -O2 -mb -O2 -g -O2 -DIN_GCC
-DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition
-isystem ./include -fpic -DNO_FPSCR_VALUES -w -Wno-sync-nand -g -DIN_LIBGCC2
-fbuilding-libgcc -fno-stack-protector -Dinhibit_libc -fpic -DNO_FPSCR_VALUES
-w -Wno-sync-nand -I. -I. -I../../.././gcc -I/src/libgcc -I/src/libgcc/.
-I/src/libgcc/../gcc -I/src/libgcc/../include -o _moddi3.o -MT _moddi3.o -MD
-MP -MF _moddi3.dep -DL_moddi3 -c /src/libgcc/libgcc2.c -fexceptions
-fnon-call-exceptions -fvisibility=hidden -DHIDE_EXPORTS
*** stack smashing detected ***: sh/build/./gcc/cc1 terminated
during RTL pass: expand
/src/libgcc/libgcc2.c: In function ‘__moddi3’:
/src/libgcc/libgcc2.c:1092:9: internal compiler error: Aborted
d0 = 1 / d0; /* Divide intentionally by zero. */
~~~^~~~~~~~
0x109919b crash_signal
/src/gcc/toplev.c:325
0x175dbbe gen_udivsi3(rtx_def*, rtx_def*, rtx_def*)
sh/build/gcc/insn-emit.c:12919
0xdd4687 insn_gen_fn::operator()(rtx_def*, rtx_def*, rtx_def*) const
/src/gcc/recog.h:302
0xe85b15 maybe_gen_insn(insn_code, unsigned int, expand_operand*)
/src/gcc/optabs.c:7103
0xe733e3 expand_binop_directly
/src/gcc/optabs.c:1071
0xe738b2 expand_binop(machine_mode, optab_tag, rtx_def*, rtx_def*, rtx_def*,
int, optab_methods)
/src/gcc/optabs.c:1159
0xe75ead sign_expand_binop(machine_mode, optab_tag, optab_tag, rtx_def*,
rtx_def*, rtx_def*, int, optab_methods)
/src/gcc/optabs.c:1879
0xb097aa expand_divmod(int, tree_code, machine_mode, rtx_def*, rtx_def*,
rtx_def*, int)
/src/gcc/expmed.c:5091
0xb362c8 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
/src/gcc/expr.c:8844
0x9747a9 expand_gimple_stmt_1
/src/gcc/cfgexpand.c:3713
0x974ad1 expand_gimple_stmt
/src/gcc/cfgexpand.c:3773
0x97e208 expand_gimple_basic_block
/src/gcc/cfgexpand.c:5774
0x97fa5e execute
/src/gcc/cfgexpand.c:6375
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
...
>From gcc-bugs-return-582744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:45:51 2017
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Subject: [Bug tree-optimization/83104] [8 Regression] ICE: Segmentation fault
Date: Wed, 22 Nov 2017 16:45:00 -0000
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
Author: glisse
Date: Wed Nov 22 16:44:46 2017
New Revision: 255068
URL: https://gcc.gnu.org/viewcvs?rev=255068&root=gcc&view=rev
Log:
Avoid two_valued_val_range_p for pointers.
2017-11-22 Marc Glisse <marc.glisse@inria.fr>
PR tree-optimization/83104
gcc/
* vr-values.c (simplify_stmt_using_ranges): Check integral argument,
not result.
gcc/testsuite/
* gcc.c-torture/compile/pr83104.c: New file.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr83104.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/vr-values.c
>From gcc-bugs-return-582745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:46:29 2017
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Subject: [Bug c++/80711] warn on non-const accessor member functions
Date: Wed, 22 Nov 2017 16:46:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
There is a warning like that in the middle-end: -Wsuggest-attribute=pure.
Unfortunately, it's only good for functions that are actually emitted (i.e.,
not for C++ inline functions).
$ cat t.C && gcc -O2 -S -Wall -Wsuggest-attribute=pure t.C
typedef int X;
struct indirect_cmp {
bool operator()(const X* l, const X* r);
};
bool indirect_cmp::operator()(const X* l, const X* r) { return *l < *r; }
t.C: In member function ‘bool indirect_cmp::operator()(const X*, const X*)’:
t.C:7:6: warning: function might be candidate for attribute ‘pure’
[-Wsuggest-attribute=pure]
bool indirect_cmp::operator()(const X* l, const X* r) { return *l < *r; }
^~~~~~~~~~~~
>From gcc-bugs-return-582746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:47:42 2017
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Subject: [Bug target/83111] [sh] stack smashing detected in gen_udivsi3
Date: Wed, 22 Nov 2017 16:47:00 -0000
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |sh
--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Looking at insn-emit.c, we see:
...
/* src/gcc/config/sh/sh.md:2273 */
rtx
gen_udivsi3 (rtx operand0,
rtx operand1,
rtx operand2)
{
rtx_insn *_val = 0;
start_sequence ();
{
rtx operands[3];
operands[0] = operand0;
operands[1] = operand1;
operands[2] = operand2;
#define FAIL return (end_sequence (), _val)
#define DONE return (_val = get_insns (),end_sequence (), _val)
// #line 2278 "src/gcc/config/sh/sh.md"
{
rtx last;
operands[3] = gen_reg_rtx (Pmode);
...
In other words, we declare an array with size 3: "rtx operands[3]", and then
write the 4th element: "operands[3] = gen_reg_rtx (Pmode)".
>From gcc-bugs-return-582747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:53:33 2017
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Subject: [Bug target/82907] [8 regression] gcc.target/powerpc/p9-xxbr-1.c fails after r254464
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Carl Love <carll at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
--- Comment #2 from Carl Love <carll at gcc dot gnu.org> ---
The fix for the regression was committed on 22/14/2017. The commit number is
254732 by Carl Love
>From gcc-bugs-return-582748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 16:54:12 2017
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83111] [sh] stack smashing detected in gen_udivsi3
Date: Wed, 22 Nov 2017 16:54:00 -0000
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |olegendo at gcc dot gnu.org
--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
This looks like the offending commit:
...
commit 0e3876bfd55e2888a012d3e304196eb2d4231ecf
Author: olegendo <olegendo@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue May 3 06:47:34 2016 +0000
gcc/
* config/sh/sh.md (udivsi3, divsi3, mulsi3): Simplify.
(mulhisi3, umulhisi3, (smulsi3_highpart, umulsi3_highpart): Convert to
define_insn_and_split.
(mulsi3_i): New define_insn_and_split.
(mulsi3_call): Convert to define_insn.
(mulsidi3, mulsidi3_compact, umulsidi3, umulsidi3_compact):
Remove constraints.
...
which contains this change:
...
diff --git a/gcc/config/sh/sh.md b/gcc/config/sh/sh.md
index da1dfe9..2d9502b 100644
--- a/gcc/config/sh/sh.md
+++ b/gcc/config/sh/sh.md
@@ -2244,16 +2244,9 @@
(define_expand "udivsi3"
- [(set (match_dup 3) (symbol_ref:SI "__udivsi3"))
- (set (reg:SI R4_REG) (match_operand:SI 1 "general_operand" ""))
- (set (reg:SI R5_REG) (match_operand:SI 2 "general_operand" ""))
- (parallel [(set (match_operand:SI 0 "register_operand" "")
- (udiv:SI (reg:SI R4_REG)
- (reg:SI R5_REG)))
- (clobber (reg:SI T_REG))
- (clobber (reg:SI PR_REG))
- (clobber (reg:SI R4_REG))
- (use (match_dup 3))])]
+ [(set (match_operand:SI 0 "register_operand")
+ (udiv:SI (match_operand:SI 1 "general_operand")
+ (match_operand:SI 2 "general_operand")))]
""
{
rtx last;
...
The "operands[3]" refers to the "(match_dup 3)" that was removed here.
>From gcc-bugs-return-582749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 17:00:50 2017
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--- Comment #6 from Andreas Schwab <schwab@linux-m68k.org> ---
If you already know strlen (d) you can use strcpy or memcpy instead.
>From gcc-bugs-return-582751-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 17:03:42 2017
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/83112] New: Silence warnings from PowerPC libgcc float128-ifunc.c compilation
Date: Wed, 22 Nov 2017 17:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83112
Bug ID: 83112
Summary: Silence warnings from PowerPC libgcc float128-ifunc.c
compilation
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
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The ifunc handlers in libgcc to switch between using PowerPC ISA 2.07 software
emulation for IEEE 128-bit floating point and ISA 3.0 hardware instructions get
a lot of warnings due to the new option -Wattribute-alias.
The solution is to change the ifunc handler from returning void * to a pointer
to the appropriate function.
>From gcc-bugs-return-582750-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 17:03:41 2017
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Subject: [Bug target/82190] Possibly latent miscompilation issue on ppc64le-linux-gnu for memcpy-bi.c with -fweb -fno-optimize-strlen
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed. Only fails on LE (or with ABIv2 at least), and needs -mcpu=power7
or higher to fail.
>From gcc-bugs-return-582752-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 17:04:33 2017
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Subject: [Bug libgcc/83112] Silence warnings from PowerPC libgcc float128-ifunc.c compilation
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Michael Meissner <meissner at gcc dot gnu.org> changed:
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| |meissner at gcc dot gnu.org,
| |segher at gcc dot gnu.org,
| |wschmidt at gcc dot gnu.org
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>From gcc-bugs-return-582753-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 17:07:43 2017
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Subject: [Bug tree-optimization/83104] [8 Regression] ICE: Segmentation fault
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-582754-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 17:12:06 2017
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From: "werner.blokbuster at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83113] New: Bogus "duplicate allocatable attribute" error for submodule character function
Date: Wed, 22 Nov 2017 17:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83113
Bug ID: 83113
Summary: Bogus "duplicate allocatable attribute" error for
submodule character function
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
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Priority: P3
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The code below gives the (I believe, bogus) error with gfortran 7.2:
test_suballoc.f:18:46:
character(:), allocatable :: next_line
1
Error: Duplicate ALLOCATABLE attribute specified at (1)
module mm
implicit none
interface
module function next_line(lu)
implicit none
integer, intent(in) :: lu
character(:), allocatable :: next_line
end function next_line
end interface
end module mm
submodule (mm) oo
implicit none
contains
module function next_line(lu)
integer, intent(in) :: lu
character(:), allocatable :: next_line
next_line = 'Hello!'
end function next_line
end submodule oo
program test_suballoc
use mm
implicit none
write(*,*) next_line(3)
end program test_suballoc
If the two "character(:), allocatable" lines are replaced with "character(6)"
the code compiles and runs as expected.
WB
>From gcc-bugs-return-582755-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 17:16:29 2017
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Subject: [Bug fortran/83113] Bogus "duplicate allocatable attribute" error for submodule character function
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed for 6.4.0, 7.2.0, and trunk (8.0).
>From gcc-bugs-return-582756-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 17:20:01 2017
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Subject: [Bug rtl-optimization/83095] [8 regression] many tests fail starting with r255001
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seurer at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from seurer at gcc dot gnu.org ---
I ran a test with r255067 and these failing tests now succeed.
>From gcc-bugs-return-582757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 17:31:44 2017
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83111] [sh] stack smashing detected in gen_udivsi3
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--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
By reverting the patch, I was able to finish the build.
>From gcc-bugs-return-582758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 17:55:09 2017
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Subject: [Bug middle-end/82253] [6/7/8 Regression] ICE in convert_move, at expr.c:604
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42684
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42684&action=edit
gcc8-pr82253.patch
Untested fix.
>From gcc-bugs-return-582759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 18:13:39 2017
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Subject: [Bug target/83100] [8 Regression] powerpc: internal compiler error: in get_variable_section, at varasm.c:1150 with -fdata-sections
Date: Wed, 22 Nov 2017 18:13:00 -0000
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--- Comment #3 from James Clarke <jrtc27 at jrtc27 dot com> ---
With the same example, I can reproduce on aarch64, armel, powerpc, ppc64 and
ppc64el.
>From gcc-bugs-return-582760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 18:18:21 2017
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-582761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 18:25:59 2017
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simon at pushface dot org changed:
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----------------------------------------------------------------------------
CC| |simon at pushface dot org
--- Comment #8 from simon at pushface dot org ---
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@255003
138bc75d-0d04-0410-961f-82ee72b054a4
I configured with
Target: arm-eabi
Configured with: /Volumes/Miscellaneous/tmp/gcc/configure
--build=x86_64-apple-darwin15 --disable-libada --disable-libcc1
--disable-libcilkrts --disable-libffi --disable-libgomp --disable-libmudflap
--disable-libquadmath --disable-libsanitizer --disable-libssp
--disable-libstdcxx-pch --disable-lto --disable-nls --disable-shared
--disable-threads --disable-tls --enable-languages=c,ada
--prefix=/Volumes/Miscellaneous/arm/gcc-8.0.0 --target=arm-eabi --with-gnu-as
--with-gnu-ld --with-libgloss --with-newlib
--with-stage1-ldflags='-static-libstdc++ -static-libgcc
-Wl,-headerpad_max_install_names' --with-system-zlib --without-libiconv-prefix
--with-multilib-list=rmprofile
(note the --with-stage1-ldflags)
and while building gnat tools get
gnatlink -v gnatmake -o ../../gnatmake \
--GCC="gcc -I../generated
-I/opt/gcc-8.0.0/lib/gcc/x86_64-apple-darwin15/8.0.0/adalib/../adainclude
-I/opt/gcc-8.0.0/lib/gcc/x86_64-apple-darwin15/8.0.0/adalib -I.
-I/Volumes/Miscellaneous/tmp/gcc/gcc/ada" --LINK="g++ -static-libstdc++
-static-libgcc -static-libstdc++ -static-libgcc
-Wl,-headerpad_max_install_names -Wl,-no_pie " ../link.o ../targext.o
../../ggc-none.o ../../libcommon-target.a ../../libcommon.a
../../../libcpp/libcpp.a -liconv ../../../libbacktrace/.libs/libbacktrace.a
../../../libiberty/libiberty.a
gnatlink: Could not locate linker: g++ -static-libstdc++ -static-libgcc
-static-libstdc++ -static-libgcc -Wl,-headerpad_max_install_names -Wl,-no_pie
>From gcc-bugs-return-582762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 18:35:44 2017
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--- Comment #9 from simon at pushface dot org ---
errm - I think I need to rebuild the host compiler so I get the proper gnatlink
to rebuild the cross compiler. Sorry.
>From gcc-bugs-return-582763-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 18:37:10 2017
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From: "doko at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81228] [7/8 Regression] ICE in gen_vec_cmpv2dfv2di, at config/aarch64/aarch64-simd.md:2508
Date: Wed, 22 Nov 2017 18:37:00 -0000
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Matthias Klose <doko at gcc dot gnu.org> changed:
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--- Comment #3 from Matthias Klose <doko at gcc dot gnu.org> ---
seen recently in a mariadb 10.1 build, worked around with -O2 instead building
with -O3.
void *a;
void b() {
char c;
long d;
char *e = a;
for (; d; d++) {
double f, g;
c = g < f || g > f;
e[d] = c;
}
}
$ gcc -c -g -O3 ts_expr_node.i
ts_expr_node.i: In function 'b':
ts_expr_node.i:2:6: internal compiler error: in gen_vec_cmpv2dfv2di, at
config/aarch64/aarch64-simd.md:2495
void b() {
^
Please submit a full bug report,
with preprocessed source if appropriate.
>From gcc-bugs-return-582764-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 18:40:26 2017
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From: "doko at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83114] New: [7/8 Regression] ICE in gen_vec_cmpv2dfv2di, at config/aarch64/aarch64-simd.md:2495
Date: Wed, 22 Nov 2017 18:40:00 -0000
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Bug ID: 83114
Summary: [7/8 Regression] ICE in gen_vec_cmpv2dfv2di, at
config/aarch64/aarch64-simd.md:2495
Product: gcc
Version: 7.2.1
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seen with the branch and the trunk, doesn't show with -O2. Maybe a duplicate of
PR81228.
void *a;
void b() {
char c;
long d;
char *e = a;
for (; d; d++) {
double f, g;
c = g < f || g > f;
e[d] = c;
}
}
$ gcc -c -g -O3 ts_expr_node.i
ts_expr_node.i: In function 'b':
ts_expr_node.i:2:6: internal compiler error: in gen_vec_cmpv2dfv2di, at
config/aarch64/aarch64-simd.md:2495
void b() {
^
Please submit a full bug report,
with preprocessed source if appropriate.
>From gcc-bugs-return-582765-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 18:43:38 2017
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Subject: [Bug target/83114] [7/8 Regression] ICE in gen_vec_cmpv2dfv2di, at config/aarch64/aarch64-simd.md:2495
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-22
CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed.
>From gcc-bugs-return-582766-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 19:19:50 2017
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--- Comment #2 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Author: jb
Date: Wed Nov 22 19:19:13 2017
New Revision: 255072
URL: https://gcc.gnu.org/viewcvs?rev=255072&root=gcc&view=rev
Log:
PR 83097 Use __BYTE_ORDER__ predefined macro instead of runtime check
By using the __BYTE_ORDER__ predefined macro we don't need the
determine_endianness function anymore.
Regtested on x86_64-pc-linux-gnu.
libgfortran/ChangeLog:
2017-11-22 Janne Blomqvist <jb@gcc.gnu.org>
PR libfortran/83097
* io/inquire.c (inquire_via_unit): Use __BYTE_ORDER__ predefined
macro.
* io/open.c (st_open): Likewise.
* io/transfer.c (data_transfer_init): Likewise.
* io/write.c (btoa_big): Likewise.
(otoa_big): Likewise.
(ztoa_big): Likewise.
* libgfortran.h (big_endian): Remove variable.
(GFOR_POINTER_TO_L1): Use __BYTE_ORDER__ macro.
* runtime/main.c (determine_endianness): Remove function.
(init): Remove call to determine_endianness.
* runtime/minimal.c: Remove setting big_endian variable.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/inquire.c
trunk/libgfortran/io/open.c
trunk/libgfortran/io/transfer.c
trunk/libgfortran/io/write.c
trunk/libgfortran/libgfortran.h
trunk/libgfortran/runtime/main.c
trunk/libgfortran/runtime/minimal.c
>From gcc-bugs-return-582767-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 19:24:39 2017
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Subject: [Bug libfortran/83097] Use __BYTE_ORDER__ instead of runtime test
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
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CC| |jb at gcc dot gnu.org
--- Comment #3 from Janne Blomqvist <jb at gcc dot gnu.org> ---
We now use __BYTE_ORDER__. Leaving this PR open as a reminder to optimize
memcmp_char4.
>From gcc-bugs-return-582769-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 19:42:31 2017
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Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
Date: Wed, 22 Nov 2017 19:42:00 -0000
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--- Comment #19 from Neil Carlson <neil.n.carlson at gmail dot com> ---
This fixes the code of comment 12 for me. All the other test cases continue to
work as expected. This can be closed as "fixed" as far as I'm concerned.
Thanks Paul!
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Subject: [Bug rtl-optimization/83030] [8 regression] ICE in create_pseudo_cfg, at dwarf2cfi.c:2840
Date: Wed, 22 Nov 2017 19:42:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|gcov-profile |rtl-optimization
--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Recategorizing.
>From gcc-bugs-return-582770-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 19:45:34 2017
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Subject: =?UTF-8?B?W0J1ZyBhZGEvODMwMTZdIGduYXQxOiB3YXJuaW5nOiBjb21tYW5kIGxpbmUg?= =?UTF-8?B?b3B0aW9uIOKAmC1ub3N0ZGluYysr4oCZIGlzIHZhbGlkIGZvciBDKysvT2Jq?= =?UTF-8?B?QysrIGJ1dCBub3QgZm9yIEFkYQ==?Date: Wed, 22 Nov 2017 19:45:00 -0000
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--- Comment #10 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> errm - I think I need to rebuild the host compiler so I get the proper
> gnatlink to rebuild the cross compiler. Sorry.
See also PR ada/81878.
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Subject: [Bug c++/83115] New: Capturing the local variable/function parameter by value generates an compilation error
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Bug ID: 83115
Summary: Capturing the local variable/function parameter by
value generates an compilation error
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// This simple code cannot be compiled in some cases:
#include <iostream>
#include <chrono>
void doSomething(const double value)
{
[ now = std::chrono::system_clock::now(), value]{}(); // Error
// [ now = std::chrono::system_clock::now(), value = value]{}(); // OK
// [ value, now = std::chrono::system_clock::now()]{}(); // OK
}
int main()
{
doSomething(42.0);
return 0;
}
>From gcc-bugs-return-582772-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 20:04:47 2017
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Subject: [Bug c++/83115] Capturing the local variable/function parameter by value generates a compilation error
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--- Comment #1 from Alexander Kolesov <alexandr.kolesov at gmail dot com> ---
The error we can see:
prog.cc: In function 'void doSomething(double)':
prog.cc:6:44: error: 'value' was not declared in this scope
[ now = std::chrono::system_clock::now(), value]{}();
^~~~~
prog.cc:6:44: error: declaration of '<typeprefixerror>value' shadows a
parameter
prog.cc:4:31: warning: unused parameter 'value' [-Wunused-parameter]
void doSomething(const double value)
~~~~~~~~~~~~~^~~~~
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Subject: [Bug middle-end/83074] Shared object built with `-pie --coverage' hangs forever
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--- Comment #7 from Stefan Vargyas <stvar at yahoo dot com> ---
>
> libc.so.6 is a shared library, not a PIE. It is normally linked with -shared,
> just arranged to have .interp section and a meaningful e_entry in Ehdr.
> PIE is something significantly different, in particular it is the executable,
> albeit position independent, e.g. required to be the first in symbol search
> scope so that its symbols bind locally.
>
Jakub, thank you very much for your deeply insightful info.
I should have had a look at glibc prior to using the `-pie' hackery
for to achive the desired result of running 'foo.so' by itself.
The right solution (at least on GNU/Linux ELF platforms) is to rely on
`-shared', `-Wl,--entry' and a proper '.interp' section in the ELF file
built. (E.g. one cannot get rid of the issues seen above implied by
'__libc_csu_{init,fini}'.)
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Subject: [Bug c++/83116] New: Statement with no effect causes wrong code of static object constexpr method
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object constexpr method
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gcc at gajoch dot pl
Target Milestone: ---
Created attachment 42685
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42685&action=edit
Preprocessed source
Following testcase:
$ cat main.cpp
#include <cstdio>
struct foo {
constexpr foo() : size_(0) {
(void)size();
}
constexpr int size() {
return size_;
}
int size_;
};
int main() {
static foo var;
var.size_ = 5;
std::printf("%d %d", var.size_, var.size());
return 0;
}
$ g++ -Wall -Wextra -pedantic -O0 main.cpp -o main && ./main
5 5
$ g++ -Wall -Wextra -pedantic -O1 main.cpp -o main && ./main
5 0
(Same happens on -Og, -O2 and -O3)
Tested on:
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --disable-multilib --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
Thread model: posix
gcc version 7.2.0 (GCC)
Correct behavior is seen using gcc-5.4, clang and msvc.
Removing constructor body gives correct code - this is stripped version,
originally there was assert(this->size() >= 0);
UBSAN gives no results.
This bug occurs also on 6.1.0, 6.2.0, 6.3.0, 7.1.0, 7.2.0 and today's trunk
(8.0.0 20171122), as tested on compiler explorer: https://godbolt.org/g/hr4Nq4
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/62170] wrong quoting (and colors) for typedef diagnostics
Date: Wed, 22 Nov 2017 20:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62170
--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Wed Nov 22 20:37:58 2017
New Revision: 255076
URL: https://gcc.gnu.org/viewcvs?rev=255076&root=gcc&view=rev
Log:
C/C++: fix quoting of "aka" typedef information (PR 62170)
PR 62170 describes a problem with how the quoting in pp_format
interacts with the "aka" information for typedefs in %qT for
the C family of frontends, and also now for %qH and %qI in the
C++ frontend: we print:
'Py_ssize_t* {aka int*}'
^^^^^^^^^^^^^^^^^^^^^^ colorized as "quote"
i.e.
'[START_COLOR]Py_ssize_t* {aka int*}[END_COLOR]'
when we should print:
'Py_ssize_t*' {aka 'int*'}
^^^^^^^^^^^ ^^^^ colorized as "quote"
i.e.
'[START_COLOR]Py_ssize_t*[END_COLOR]' {aka '[START_COLOR]int*[END_COLOR]'}
where the opening and closing quote characters and colorization are
added by the 'q' handling within pp_format.
This patch fixes the quoting by updating the %T handling in C and C++
and the %H/%I handling in C++ to insert the quoting appropriately.
It converts the "quote" param of the pp_format_decoder callback from
bool to bool *, allowing for the %T and %H/%I handlers to write
false back to it, to avoid printing the closing quote for the cases
like the above where the trailing closing quote isn't needed.
It introduces pp_begin_quote/pp_end_quote to simplify this. These
take a "bool show_color", rather than using "pp_show_color (pp)"
since cxx_pp's pp_show_color isn't currently initialized (since
cxx_initialize_diagnostics happens before diagnostic_color_init).
gcc/c/ChangeLog:
PR c++/62170
* c-objc-common.c (c_tree_printer): Convert penultimate param from
bool to bool *. Within '%T' handling, if showing an "aka", use
"quoted" param to add appropriate quoting.
gcc/cp/ChangeLog:
PR c++/62170
* error.c (type_to_string): Add leading comment. Add params
"postprocessed", "quote", and "show_color", using them to fix
quoting of the "aka" for types involving typedefs.
(arg_to_string): Update for new params to type_to_string.
(cxx_format_postprocessor::handle): Likewise.
(cp_printer): Convert penultimate param from bool to bool *.
Update call to type_to_string and calls to
defer_phase_2_of_type_diff.
gcc/fortran/ChangeLog:
PR c++/62170
* error.c (gfc_notify_std): Convert "quoted" param from bool to
bool *.
gcc/ChangeLog:
PR c++/62170
* pretty-print.c (pp_format): Move quoting implementation to
pp_begin_quote and pp_end_quote. Update pp_format_decoder call
to pass address of "quote" local.
(pp_begin_quote): New function.
(pp_end_quote): New function.
* pretty-print.h (printer_fn): Convert penultimate param from bool
to bool *.
(pp_begin_quote): New decl.
(pp_end_quote): New decl.
* tree-diagnostic.c (default_tree_printer): Convert penultimate
param from bool to bool *.
* tree-diagnostic.h (default_tree_printer): Likewise.
gcc/testsuite/ChangeLog:
PR c++/62170
* g++.dg/diagnostic/aka1.C: Update expected error messages to
reflect fixes to quoting.
* g++.dg/diagnostic/aka2.C: New test case.
* g++.dg/parse/error55.C: Update expected error messages to
reflect fixes to quoting.
* gcc.dg/diag-aka-1.c: Likewise.
* gcc.dg/diag-aka-2.c: New test case.
* gcc.dg/pr13804-1.c: Update expected error messages to reflect
fixes to quoting.
* gcc.dg/pr56980.c: Likewise.
* gcc.dg/pr65050.c: Likewise.
* gcc.dg/redecl-14.c: Likewise.
* gcc.dg/utf16-4.c Likewise.
* gcc.target/i386/sse-vect-types.c (__m128d): Likewise.
* obj-c++.dg/invalid-type-1.mm: Likewise.
* objc.dg/proto-lossage-4.m: Likewise.
Added:
trunk/gcc/testsuite/g++.dg/diagnostic/aka2.C
trunk/gcc/testsuite/gcc.dg/diag-aka-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-objc-common.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/error.c
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/error.c
trunk/gcc/pretty-print.c
trunk/gcc/pretty-print.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/diagnostic/aka1.C
trunk/gcc/testsuite/g++.dg/parse/error55.C
trunk/gcc/testsuite/gcc.dg/diag-aka-1.c
trunk/gcc/testsuite/gcc.dg/pr13804-1.c
trunk/gcc/testsuite/gcc.dg/pr56980.c
trunk/gcc/testsuite/gcc.dg/pr65050.c
trunk/gcc/testsuite/gcc.dg/redecl-14.c
trunk/gcc/testsuite/gcc.dg/utf16-4.c
trunk/gcc/testsuite/gcc.target/i386/sse-vect-types.c
trunk/gcc/testsuite/obj-c++.dg/invalid-type-1.mm
trunk/gcc/testsuite/objc.dg/proto-lossage-4.m
trunk/gcc/tree-diagnostic.c
trunk/gcc/tree-diagnostic.h
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/62170] wrong quoting (and colors) for typedef diagnostics
Date: Wed, 22 Nov 2017 20:48:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Should be fixed on trunk for gcc 8 by r255076.
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Subject: =?UTF-8?B?W0J1ZyBsaWJnb21wLzgzMTA2XSBbOCByZWdyZXNzaW9uXSBsaWJnb21wL3Rh?= =?UTF-8?B?cmdldC5jOjI2NzE6MjogZXJyb3I6IOKAmHN0cm5jYXTigJkgc3BlY2lmaWVk?= =?UTF-8?B?IGJvdW5kIDUgZXF1YWxzIHNvdXJjZSBsZW5ndGggWy1XZXJyb3I9c3RyaW5n?= =?UTF-8?B?b3Atb3ZlcmZsb3c9XQ==?Date: Wed, 22 Nov 2017 20:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83106
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 22 20:49:56 2017
New Revision: 255080
URL: https://gcc.gnu.org/viewcvs?rev=255080&root=gcc&view=rev
Log:
PR libgomp/83106
* target.c (gomp_target_init): Compute lengths just once and
use them in both malloc size and subsequent copying.
Modified:
trunk/libgomp/ChangeLog
trunk/libgomp/target.c
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Subject: [Bug target/83117] New: FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test for excess errors)
Date: Wed, 22 Nov 2017 20:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83117
Bug ID: 83117
Summary: FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test
for excess errors)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Reporter: ubizjak at gmail dot com
Target Milestone: ---
Recently ms-sysv.c tests start to FAIL:
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c -O2 "-DGEN_ARGS=-p1" (test for
excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c -O2 "-DGEN_ARGS=-p5" (test for
excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c -mcall-ms2sysv-xlogues -O2
"-DGEN_ARGS=-p1" (test for excess errors)
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c -mcall-ms2sysv-xlogues -O2
"-DGEN_ARGS=-p5" (test for excess errors)
These all fail with some hundred(?) of:
Excess errors:
/ssd/uros/gcc-build/gcc/testsuite/gcc/ms-sysv/ms-sysv-generated.h:18060:9:
warning: function called through a non-compatible type
/ssd/uros/gcc-build/gcc/testsuite/gcc/ms-sysv/ms-sysv-generated.h:18064:9:
warning: function called through a non-compatible type
/ssd/uros/gcc-build/gcc/testsuite/gcc/ms-sysv/ms-sysv-generated.h:18068:9:
warning: function called through a non-compatible type
...
/ssd/uros/gcc-build/gcc/testsuite/gcc/ms-sysv/ms-sysv-generated.h:32369:9:
warning: function called through a non-compatible type
/ssd/uros/gcc-build/gcc/testsuite/gcc/ms-sysv/ms-sysv-generated.h:32374:9:
warning: function called through a non-compatible type
/ssd/uros/gcc-build/gcc/testsuite/gcc/ms-sysv/ms-sysv-generated.h:32380:9:
warning: function called through a non-compatible type
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Subject: [Bug target/83117] FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test for excess errors)
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64
CC| |dansan at gcc dot gnu.org
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
CC author.
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--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Wed Nov 22 21:12:36 2017
New Revision: 255082
URL: https://gcc.gnu.org/viewcvs?rev=255082&root=gcc&view=rev
Log:
jit: update test suite for change to -Warray-bounds
jit.dg/test-error-array-bounds.c is a test of how libgccjit
handles errors coming from the middle-end, using -Warray-bounds as
an example.
It started failing as of r254830 (aka
987b3316c4e7c908e3c7d2151c20971f9707ad66),
due to that commit changing the wording of the message.
This commit fixes the jit testcase by updating it to use the new
wording.
gcc/testsuite/ChangeLog:
PR tree-optimization/82588
PR tree-optimization/82583
* jit.dg/test-error-array-bounds.c (verify_code): Update expected
error message from -Warray-bounds.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/jit.dg/test-error-array-bounds.c
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Subject: [Bug tree-optimization/82583] missing -Warray-bounds on out-of-bounds inner indices
Date: Wed, 22 Nov 2017 21:13:00 -0000
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--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Wed Nov 22 21:12:36 2017
New Revision: 255082
URL: https://gcc.gnu.org/viewcvs?rev=255082&root=gcc&view=rev
Log:
jit: update test suite for change to -Warray-bounds
jit.dg/test-error-array-bounds.c is a test of how libgccjit
handles errors coming from the middle-end, using -Warray-bounds as
an example.
It started failing as of r254830 (aka
987b3316c4e7c908e3c7d2151c20971f9707ad66),
due to that commit changing the wording of the message.
This commit fixes the jit testcase by updating it to use the new
wording.
gcc/testsuite/ChangeLog:
PR tree-optimization/82588
PR tree-optimization/82583
* jit.dg/test-error-array-bounds.c (verify_code): Update expected
error message from -Warray-bounds.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/jit.dg/test-error-array-bounds.c
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Subject: [Bug rtl-optimization/83030] [8 regression] ICE in create_pseudo_cfg, at dwarf2cfi.c:2840
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--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Wed Nov 22 21:43:22 2017
New Revision: 255083
URL: https://gcc.gnu.org/viewcvs?rev=255083&root=gcc&view=rev
Log:
PR rtl-optimization/83030
* doc/rtl.texi (Flags in an RTL Expression): Alphabetize, add entry
for CROSSING_JUMP_P and mention usage of 'jump' for JUMP_INSNs.
(Insns): Delete entry for REG_CROSSING_JUMP in register notes.
* bb-reorder.c (update_crossing_jump_flags): Do not test whether the
CROSSING_JUMP_P flag is already set before setting it.
* cfgrtl.c (fixup_partition_crossing): Likewise.
* reorg.c (relax_delay_slots): Do not consider a CROSSING_JUMP_P insn
as useless.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/bb-reorder.c
trunk/gcc/cfgrtl.c
trunk/gcc/doc/rtl.texi
trunk/gcc/reorg.c
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Subject: [Bug fortran/82392] Allign arrays for faster execution
Date: Wed, 22 Nov 2017 21:44:00 -0000
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--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Test case for the fact that we don't align, or that this
causes a performance loss?
>From gcc-bugs-return-582784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 21:46:10 2017
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Subject: [Bug rtl-optimization/83030] [8 regression] ICE in create_pseudo_cfg, at dwarf2cfi.c:2840
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
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Subject: [Bug target/79242] ICE in simplify_subreg, at simplify-rtx.c:6029
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Jozef Lawrynowicz <jozefl.gcc at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jozefl.gcc at gmail dot com
--- Comment #7 from Jozef Lawrynowicz <jozefl.gcc at gmail dot com> ---
(In reply to Andrei Pushkin from comment #6)
> Still broken in 7.2
>
> What are the chances of this bug getting some love?
I'm happy to report that I am back working on MSP430 GCC. However, I have some
other startup items to complete before I can get back to fixing bugs, but this
is top of my bug list.
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From: "neil.n.carlson at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83118] New: Bad intrinsic assignment of class(*) array component of derived type (8.0 regression)
Date: Wed, 22 Nov 2017 22:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83118
Bug ID: 83118
Summary: Bad intrinsic assignment of class(*) array component
of derived type (8.0 regression)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: neil.n.carlson at gmail dot com
Target Milestone: ---
Intrinsic assignment of a derived type with allocatable CLASS(*) array
component is not being done correctly with version 8.0 when the dynamic type is
CHARACTER.
Version 6.4.1 gives the expected result:
orig=["foo","bar"]
copy=["foo","bar"]
But 8.0 (20171122) gives an incorrect result:
orig=["foo","bar"]
copy=["foo","b"]
Here's the code:
type :: any_vector
class(*), allocatable :: v(:)
end type
type(any_vector) :: x, y
allocate(x%v,source=['foo','bar'])
select type (v => x%v)
type is (character(*))
print '("orig=[""",a,''","'',a,''"]'')', v ! expect orig=["foo","bar"]
end select
y = x ! THIS ASSIGNMENT IS NOT BEING DONE CORRECTLY
select type (v => y%v)
type is (character(*))
print '("copy=[""",a,''","'',a,''"]'')', v ! expect copy=["foo","bar"]
end select
end
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Subject: [Bug fortran/83118] Bad intrinsic assignment of class(*) array component of derived type (8.0 regression)
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--- Comment #1 from Neil Carlson <neil.n.carlson at gmail dot com> ---
Note that the incorrect string "b" is not actually 1 character long, but 3
characters: a "b" followed by 2 non-printing characters. Vim shows them as ^@
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Subject: [Bug c++/82401] [8 Regression] error: qsort comparator non-negative on sorted output: 1 in insert_late_enum_def_bindings on an invalid code
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 22 22:35:52 2017
New Revision: 255084
URL: https://gcc.gnu.org/viewcvs?rev=255084&root=gcc&view=rev
Log:
PR c++/82401
* name-lookup.c (member_name_cmp): Return 0 if a == b.
* g++.dg/cpp0x/pr82401.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr82401.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/name-lookup.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-582789-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 22 22:41:58 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83118] [7/8 Regression] Bad intrinsic assignment of class(*) array component of derived type
Date: Wed, 22 Nov 2017 22:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83118
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |6.4.0
Keywords| |wrong-code
Last reconfirmed| |2017-11-22
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
Summary|Bad intrinsic assignment of |[7/8 Regression] Bad
|class(*) array component of |intrinsic assignment of
|derived type (8.0 |class(*) array component of
|regression) |derived type
Target Milestone|--- |7.3
Known to fail| |7.2.0, 8.0
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The change occurred between revisions r241509 + 3 patches (2016-10-25, OK) and
r241635 (2016-10-27, wrong), may be r241630 (pr78026).
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From: "bpiotrowski at archlinux dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/80717] LTO wrappers segfault if run with absolute path
Date: Wed, 22 Nov 2017 22:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80717
Bartłomiej Piotrowski <bpiotrowski at archlinux dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bpiotrowski at archlinux dot org
--- Comment #4 from Bartłomiej Piotrowski <bpiotrowski at archlinux dot org> ---
Problematic change has been reverted in r253886 and backported to gcc-7-branch.
(We also did that downstream in Arch Linux prior the revert.)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/82407] [8 Regression][meta-bug] qsort_chk fallout tracking
Date: Wed, 22 Nov 2017 23:24:00 -0000
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Bug 82407 depends on bug 82401, which changed state.
Bug 82401 Summary: [8 Regression] error: qsort comparator non-negative on sorted output: 1 in insert_late_enum_def_bindings on an invalid code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82401
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
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Subject: [Bug c++/82401] [8 Regression] error: qsort comparator non-negative on sorted output: 1 in insert_late_enum_def_bindings on an invalid code
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/83119] New: segmentation fault due to two_valued_val_range_p passing NULL to to_wide
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83119
Bug ID: 83119
Summary: segmentation fault due to two_valued_val_range_p
passing NULL to to_wide
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: amodra at gmail dot com
Target Milestone: ---
Created attachment 42686
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42686&action=edit
preprocessed source
during GIMPLE pass: vrp
fetch-value.c: In function '_td_locate_field':
fetch-value.c:44:1: internal compiler error: Segmentation fault
_td_locate_field (td_thragent_t *ta,
^~~~~~~~~~~~~~~~
0x1097582b crash_signal
/home/amodra/src/gcc/gcc/toplev.c:325
0x10321d34 tree_int_cst_elt_check(tree_node const*, int, char const*, int, char
const*)
/home/amodra/src/gcc/gcc/tree.h:3277
0x10321d34 wi::to_wide(tree_node const*)
/home/amodra/src/gcc/gcc/tree.h:5246
0x10db57cf vr_values::two_valued_val_range_p(tree_node*, tree_node**,
tree_node**)
/home/amodra/src/gcc/gcc/vr-values.c:4053
0x10dbd983 vr_values::simplify_stmt_using_ranges(gimple_stmt_iterator*)
/home/amodra/src/gcc/gcc/vr-values.c:4116
0x10cfff33 vrp_folder::simplify_stmt_using_ranges(gimple_stmt_iterator*)
/home/amodra/src/gcc/gcc/tree-vrp.c:6362
0x10cfff33 vrp_folder::fold_stmt(gimple_stmt_iterator*)
/home/amodra/src/gcc/gcc/tree-vrp.c:6437
0x10bce873
substitute_and_fold_dom_walker::before_dom_children(basic_block_def*)
/home/amodra/src/gcc/gcc/tree-ssa-propagate.c:1073
0x112ad263 dom_walker::walk(basic_block_def*)
/home/amodra/src/gcc/gcc/domwalk.c:308
0x10bcd3c7 substitute_and_fold_engine::substitute_and_fold()
/home/amodra/src/gcc/gcc/tree-ssa-propagate.c:1173
0x10d0019b vrp_prop::vrp_finalize(bool)
/home/amodra/src/gcc/gcc/tree-vrp.c:6788
0x10d1236b execute_vrp
/home/amodra/src/gcc/gcc/tree-vrp.c:6864
Starting program: /home/amodra/gnu/libexec/gcc/powerpc64-linux/8.0.0/cc1
-fpreprocessed fetch-value.i -msecure-plt -quiet -dumpbase fetch-value.c
-mcpu=power7 -mlong-double-128 -auxbase-strip
/home/amodra/build/glibc/nptl_db/fetch-value.os -g -O2 -Wall -Werror -Wundef
-Wwrite-strings -Wstrict-prototypes -Wold-style-definition -std=gnu11 -version
-fgnu89-inline -fmerge-all-constants -fno-stack-protector -frounding-math -fpic
-o fetch-value.s
GNU C11 (GCC) version 8.0.0 20171122 (experimental) (powerpc64-linux)
compiled by GNU C version 8.0.0 20171122 (experimental), GMP version
6.0.0, MPFR version 3.1.1, MPC version 1.0.1, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C11 (GCC) version 8.0.0 20171122 (experimental) (powerpc64-linux)
compiled by GNU C version 8.0.0 20171122 (experimental), GMP version
6.0.0, MPFR version 3.1.1, MPC version 1.0.1, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 7c4ca94b129285c9da74e4b0a828d58f
Program received signal SIGSEGV, Segmentation fault.
wi::to_wide (t=0x0) at /home/amodra/src/gcc/gcc/tree.h:5246
5246 return wi::storage_ref (&TREE_INT_CST_ELT (t, 0), TREE_INT_CST_NUNITS
(t),
Missing separate debuginfos, use: debuginfo-install glibc-2.17-196.el7.ppc64
gmp-6.0.0-15.el7.ppc64 libmpc-1.0.1-3.el7.ppc64 mpfr-3.1.1-4.el7.ppc64
(gdb) up
#1 0x0000000010db57d0 in vr_values::two_valued_val_range_p
(this=this@entry=0x3fffffffe248,
var=var@entry=0x3fffb5b7ac20, a=a@entry=0x3fffffffdd08,
b=b@entry=0x3fffffffdd00)
at /home/amodra/src/gcc/gcc/vr-values.c:4053
4053 - wi::to_wide (vrp_val_min (TREE_TYPE (var)))) == 1
(gdb) p debug_tree(var)
<ssa_name 0x3fffb5b7ac20
type <pointer_type 0x3fffb5f20e70 psaddr_t
type <void_type 0x3fffb5b90f18 void asm_written VOID
align:8 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x3fffb5b90f18
pointer_to_this <pointer_type 0x3fffb5b91068>>
sizes-gimplified asm_written public unsigned DI
size <integer_cst 0x3fffb5aa0ff0 constant 64>
unit-size <integer_cst 0x3fffb5aa1008 constant 8>
align:64 warn_if_not_align:0 symtab:16383 alias-set -1 canonical-type
0x3fffb5b91068 context <translation_unit_decl 0x3fffb5d416f8 fetch-value.c>
pointer_to_this <pointer_type 0x3fffb5f23288>>
var <parm_decl 0x3fffb5e2f400 idx>
def_stmt idx_62 = ASSERT_EXPR <idx_47(D), idx_47(D) != 0B>;
version:62
ptr-info 0x3fffb3a12ca0>
$1 = void
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Subject: [Bug libstdc++/83120] New: [8 Regression] ext/special_functions/hyperg failure on AIX
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83120
Bug ID: 83120
Summary: [8 Regression] ext/special_functions/hyperg failure on
AIX
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: dje at gcc dot gnu.org
Target Milestone: ---
Target: power*-*-aix*
$ ./check_value.exe
/nasfarm/edelsohn/src/src/libstdc++-v3/testsuite/ext/special_functions/hyperg/check_value.cc:12315:
void test(const testcase_hyperg<Ret> (&)[Num], Ret) [with Ret = double;
unsigned int Num = 19]: Assertion 'max_abs_frac < toler' failed.
IOT/Abort trap (core dumped)
$ ./check_value.exe
line 12315 max_abs_frac = 4.82864e-13
line 12315 max_abs_frac = 5.15741e-12
line 12315 max_abs_frac = 3.10473e-11
line 12315 max_abs_frac = 1.09304e-12
line 12315 max_abs_frac = 4.82864e-13
line 12315 max_abs_frac = 2.64325e-12
line 12315 max_abs_frac = 3.21576e-12
line 12315 max_abs_frac = 2.58658e-12
line 12315 max_abs_frac = 6.15743e-13
line 12315 max_abs_frac = 1.87073e-10
line 12315 max_abs_frac = 7.72796e-10
line 12315 max_abs_frac = 5.19491e-09
line 12315 max_abs_frac = 2.15517e-10
line 12315 max_abs_frac = 5.15741e-12
line 12315 max_abs_frac = 3.10473e-11
line 12315 max_abs_frac = 1.09304e-12
line 12315 max_abs_frac = 1.87073e-10
line 12315 max_abs_frac = 7.72796e-10
line 12315 max_abs_frac = 5.19491e-09
line 12315 max_abs_frac = 2.15517e-10
line 12315 max_abs_frac = 1.68813e-09
line 12315 max_abs_frac = 2.64594e-08
line 12315 max_abs_frac = 3.02697e-07
line 12315 max_abs_frac = 4.34529e-07
line 12315 max_abs_frac = 2.36511e-07
>From gcc-bugs-return-582796-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 01:31:29 2017
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Subject: [Bug libstdc++/83120] [8 Regression] ext/special_functions/hyperg failure on AIX
Date: Thu, 23 Nov 2017 01:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83120
David Edelsohn <dje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-23
Ever confirmed|0 |1
--- Comment #1 from David Edelsohn <dje at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-582797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 04:28:24 2017
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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83111] [sh] stack smashing detected in gen_udivsi3
Date: Thu, 23 Nov 2017 04:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83111
Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-23
Ever confirmed|0 |1
--- Comment #4 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Thanks for reporting and tracking this down.
It seems there more such traps. Can you please try the following:
Index: gcc/config/sh/sh.md
===================================================================
--- gcc/config/sh/sh.md (revision 251045)
+++ gcc/config/sh/sh.md (working copy)
@@ -2277,8 +2277,8 @@
""
{
rtx last;
+ rtx func_ptr = gen_reg_rtx (Pmode);
- operands[3] = gen_reg_rtx (Pmode);
/* Emit the move of the address to a pseudo outside of the libcall. */
if (TARGET_DIVIDE_CALL_TABLE)
{
@@ -2298,16 +2298,16 @@
emit_move_insn (operands[0], operands[2]);
DONE;
}
- function_symbol (operands[3], "__udivsi3_i4i", SFUNC_GOT);
- last = gen_udivsi3_i4_int (operands[0], operands[3]);
+ function_symbol (func_ptr, "__udivsi3_i4i", SFUNC_GOT);
+ last = gen_udivsi3_i4_int (operands[0], func_ptr);
}
else if (TARGET_DIVIDE_CALL_FP)
{
- rtx lab = function_symbol (operands[3], "__udivsi3_i4",
SFUNC_STATIC).lab;
+ rtx lab = function_symbol (func_ptr, "__udivsi3_i4", SFUNC_STATIC).lab;
if (TARGET_FPU_SINGLE)
- last = gen_udivsi3_i4_single (operands[0], operands[3], lab);
+ last = gen_udivsi3_i4_single (operands[0], func_ptr, lab);
else
- last = gen_udivsi3_i4 (operands[0], operands[3], lab);
+ last = gen_udivsi3_i4 (operands[0], func_ptr, lab);
}
else if (TARGET_SH2A)
{
@@ -2318,8 +2318,8 @@
}
else
{
- rtx lab = function_symbol (operands[3], "__udivsi3", SFUNC_STATIC).lab;
- last = gen_udivsi3_i1 (operands[0], operands[3], lab);
+ rtx lab = function_symbol (func_ptr, "__udivsi3", SFUNC_STATIC).lab;
+ last = gen_udivsi3_i1 (operands[0], func_ptr, lab);
}
emit_move_insn (gen_rtx_REG (SImode, 4), operands[1]);
emit_move_insn (gen_rtx_REG (SImode, 5), operands[2]);
@@ -2405,22 +2405,22 @@
""
{
rtx last;
+ rtx func_ptr = gen_reg_rtx (Pmode);
- operands[3] = gen_reg_rtx (Pmode);
/* Emit the move of the address to a pseudo outside of the libcall. */
if (TARGET_DIVIDE_CALL_TABLE)
{
- function_symbol (operands[3], sh_divsi3_libfunc, SFUNC_GOT);
- last = gen_divsi3_i4_int (operands[0], operands[3]);
+ function_symbol (func_ptr, sh_divsi3_libfunc, SFUNC_GOT);
+ last = gen_divsi3_i4_int (operands[0], func_ptr);
}
else if (TARGET_DIVIDE_CALL_FP)
{
- rtx lab = function_symbol (operands[3], sh_divsi3_libfunc,
+ rtx lab = function_symbol (func_ptr, sh_divsi3_libfunc,
SFUNC_STATIC).lab;
if (TARGET_FPU_SINGLE)
- last = gen_divsi3_i4_single (operands[0], operands[3], lab);
+ last = gen_divsi3_i4_single (operands[0], func_ptr, lab);
else
- last = gen_divsi3_i4 (operands[0], operands[3], lab);
+ last = gen_divsi3_i4 (operands[0], func_ptr, lab);
}
else if (TARGET_SH2A)
{
@@ -2431,8 +2431,8 @@
}
else
{
- function_symbol (operands[3], sh_divsi3_libfunc, SFUNC_GOT);
- last = gen_divsi3_i1 (operands[0], operands[3]);
+ function_symbol (func_ptr, sh_divsi3_libfunc, SFUNC_GOT);
+ last = gen_divsi3_i1 (operands[0], func_ptr);
}
emit_move_insn (gen_rtx_REG (SImode, 4), operands[1]);
emit_move_insn (gen_rtx_REG (SImode, 5), operands[2]);
@@ -6519,6 +6519,7 @@
[(call (mem (match_operand:SI 0 "symbol_ref_operand" ""))
(match_operand 1 "" ""))
(use (reg:SI FPSCR_MODES_REG))
+ (use (match_scratch 2))
(clobber (reg:SI PR_REG))]
"TARGET_SH2A && sh2a_is_function_vector_call (operands[0])"
{
@@ -6629,6 +6630,7 @@
(call (mem:SI (match_operand:SI 1 "symbol_ref_operand" ""))
(match_operand 2 "" "")))
(use (reg:SI FPSCR_MODES_REG))
+ (use (match_scratch 3))
(clobber (reg:SI PR_REG))]
"TARGET_SH2A && sh2a_is_function_vector_call (operands[1])"
{
@@ -7044,13 +7046,11 @@
[(const_int 0)]
{
rtx lab = PATTERN (gen_call_site ());
- rtx call_insn;
+ rtx tmp = gen_rtx_REG (SImode, R1_REG);
- operands[3] = gen_rtx_REG (SImode, R1_REG);
-
- sh_expand_sym_label2reg (operands[3], operands[1], lab, true);
- call_insn = emit_call_insn (gen_sibcall_valuei_pcrel (operands[0],
- operands[3],
+ sh_expand_sym_label2reg (tmp, operands[1], lab, true);
+ rtx call_insn = emit_call_insn (gen_sibcall_valuei_pcrel (operands[0],
+ tmp,
operands[2],
copy_rtx (lab)));
SIBLING_CALL_P (call_insn) = 1;
@@ -7078,12 +7078,11 @@
[(const_int 0)]
{
rtx lab = PATTERN (gen_call_site ());
+ rtx tmp = gen_rtx_REG (SImode, R1_REG);
- operands[3] = gen_rtx_REG (SImode, R1_REG);
-
- sh_expand_sym_label2reg (operands[3], operands[1], lab, true);
+ sh_expand_sym_label2reg (tmp, operands[1], lab, true);
rtx i = emit_call_insn (gen_sibcall_valuei_pcrel_fdpic (operands[0],
- operands[3],
+ tmp,
operands[2],
copy_rtx (lab)));
SIBLING_CALL_P (i) = 1;
>From gcc-bugs-return-582798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 05:07:15 2017
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Subject: [Bug tree-optimization/83119] segmentation fault due to two_valued_val_range_p passing NULL to to_wide
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 83104 ***
>From gcc-bugs-return-582799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 05:07:39 2017
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Subject: [Bug tree-optimization/83104] [8 Regression] ICE: Segmentation fault
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amodra at gmail dot com
--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
*** Bug 83119 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-582800-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 06:27:30 2017
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Subject: [Bug c++/83121] New: [8 Regression] ICE: in linemap_ordinary_map_lookup, at libcpp/line-map.c:995
Date: Thu, 23 Nov 2017 06:27:00 -0000
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Bug ID: 83121
Summary: [8 Regression] ICE: in linemap_ordinary_map_lookup, at
libcpp/line-map.c:995
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Version: 8.0
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Building Node.js on ppc64le with "-g -flto" leads to:
g++ -g -Wno-class-memaccess -Wno-ignored-qualifiers -flto=60 -pthread
-rdynamic -m64
-Wl,--whole-archive,/home/trippels/node/out/Release/obj.target/deps/openssl/libopenssl.a
-Wl,--no-whole-archive -Wl,-z,noexecstack -Wl,--whole-archive
/home/trippels/node/out/Release/obj.target/deps/v8/src/libv8_base.a
-Wl,--no-whole-archive -pthread -o /home/trippels/node/out/Release/cctest
-Wl,--start-group
/home/trippels/node/out/Release/obj.target/cctest/test/cctest/node_module_reg.o
/home/trippels/node/out/Release/obj.target/cctest/test/cctest/node_test_fixture.o
/home/trippels/node/out/Release/obj.target/cctest/test/cctest/test_aliased_buffer.o
/home/trippels/node/out/Release/obj.target/cctest/test/cctest/test_base64.o
/home/trippels/node/out/Release/obj.target/cctest/test/cctest/test_environment.o
/home/trippels/node/out/Release/obj.target/cctest/test/cctest/test_util.o
/home/trippels/node/out/Release/obj.target/cctest/test/cctest/test_url.o
/home/trippels/node/out/Release/obj.target/cctest/test/cctest/test_inspector_socket.o
/home/trippels/node/out/Release/obj.target/cctest/test/cctest/test_inspector_socket_server.o
/home/trippels/node/out/Release/obj.target/deps/gtest/libgtest.a
/home/trippels/node/out/Release/obj.target/deps/zlib/libzlib.a
/home/trippels/node/out/Release/obj.target/deps/openssl/libopenssl.a
/home/trippels/node/out/Release/obj.target/deps/http_parser/libhttp_parser.a
/home/trippels/node/out/Release/obj.target/deps/uv/libuv.a
/home/trippels/node/out/Release/obj.target/deps/nghttp2/libnghttp2.a
/home/trippels/node/out/Release/obj.target/deps/v8/src/libv8_libplatform.a
/home/trippels/node/out/Release/obj.target/tools/icu/libicui18n.a
/home/trippels/node/out/Release/obj.target/deps/cares/libcares.a
/home/trippels/node/out/Release/obj.target/deps/v8/src/libv8_libbase.a
/home/trippels/node/out/Release/obj.target/deps/v8/src/libv8_base.a
/home/trippels/node/out/Release/obj.target/deps/v8/src/libv8_libsampler.a
/home/trippels/node/out/Release/obj.target/tools/icu/libicuucx.a
/home/trippels/node/out/Release/obj.target/tools/icu/libicudata.a
/home/trippels/node/out/Release/obj.target/tools/icu/libicustubdata.a
/home/trippels/node/out/Release/obj.target/deps/v8/src/libv8_snapshot.a
/home/trippels/node/out/Release/obj.target/node/src/async_wrap.o
/home/trippels/node/out/Release/obj.target/node/src/env.o
/home/trippels/node/out/Release/obj.target/node/src/node.o
/home/trippels/node/out/Release/obj.target/node/src/node_buffer.o
/home/trippels/node/out/Release/obj.target/node/src/node_debug_options.o
/home/trippels/node/out/Release/obj.target/node/src/node_i18n.o
/home/trippels/node/out/Release/obj.target/node/src/node_perf.o
/home/trippels/node/out/Release/obj.target/node/src/node_platform.o
/home/trippels/node/out/Release/obj.target/node/src/node_url.o
/home/trippels/node/out/Release/obj.target/node/src/util.o
/home/trippels/node/out/Release/obj.target/node/src/string_bytes.o
/home/trippels/node/out/Release/obj.target/node/src/string_search.o
/home/trippels/node/out/Release/obj.target/node/src/stream_base.o
/home/trippels/node/out/Release/obj.target/node/src/node_constants.o
/home/trippels/node/out/Release/obj.target/node/src/tracing/agent.o
/home/trippels/node/out/Release/obj.target/node/src/tracing/node_trace_buffer.o
/home/trippels/node/out/Release/obj.target/node/src/tracing/node_trace_writer.o
/home/trippels/node/out/Release/obj.target/node/src/tracing/trace_event.o
/home/trippels/node/out/Release/obj.target/node/gen/node_javascript.o
/home/trippels/node/out/Release/obj.target/node/src/node_crypto.o
/home/trippels/node/out/Release/obj.target/node/src/node_crypto_bio.o
/home/trippels/node/out/Release/obj.target/node/src/node_crypto_clienthello.o
/home/trippels/node/out/Release/obj.target/node/src/tls_wrap.o
/home/trippels/node/out/Release/obj.target/node/src/inspector_agent.o
/home/trippels/node/out/Release/obj.target/node/src/inspector_io.o
/home/trippels/node/out/Release/obj.target/node/src/inspector_js_api.o
/home/trippels/node/out/Release/obj.target/node/src/inspector_socket.o
/home/trippels/node/out/Release/obj.target/node/src/inspector_socket_server.o
/home/trippels/node/out/Release/obj.target/node/src/backtrace_posix.o -lm -ldl
-lrt -Wl,--end-group
../src/env.h:389: warning: type ‘struct AsyncHooks’ violates the C++ One
Definition Rule [-Wodr]
class AsyncHooks {
../src/env.h:389: note: a different type is defined in another translation unit
class AsyncHooks {
../src/env.h:449: note: the first difference of corresponding definitions is
field ‘providers_’
v8::Eternal<v8::String> providers_[AsyncWrap::PROVIDERS_LENGTH];
../src/env.h:449: note: a field of same name but different type is defined in
another translation unit
v8::Eternal<v8::String> providers_[AsyncWrap::PROVIDERS_LENGTH];
lto1: internal compiler error: in linemap_ordinary_map_lookup, at
libcpp/line-map.c:995
0x112ebdcf linemap_ordinary_map_lookup
../../gcc/libcpp/line-map.c:995
0x112ebdcf linemap_lookup(line_maps*, unsigned int)
../../gcc/libcpp/line-map.c:948
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper: fatal error: g++ returned 1 exit status
compilation terminated.
/home/trippels/bin/ld: fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status
Sorry, no testcase yet.
>From gcc-bugs-return-582801-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 06:37:25 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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Andrew Roberts <andrewm.roberts at sky dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andrewm.roberts at sky dot com
--- Comment #4 from Andrew Roberts <andrewm.roberts at sky dot com> ---
I've been testing on a Ryzen system and also comparing with Haswell and
Skylake. From my testing -mtune=znver1 does not perform well and never has,
including as of last snapshot:
gcc version 8.0.0 20171119 (experimental) (GCC)
-mtune=generic seems a better option for all three systems as a default for
-march=native
This is only with one test case (attached), but I've seen the same across many
other tests.
See the attached testcase (matix.c) and performance logs
Ryzen - znver1-tunebug.txt
Haswell - znver1-tunebug2.txt
Skylake - znver1-tunebug3.txt
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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--- Comment #5 from Andrew Roberts <andrewm.roberts at sky dot com> ---
I've been testing on a Ryzen system and also comparing with Haswell and
Skylake. From my testing -mtune=znver1 does not perform well and never has,
including as of last snapshot:
gcc version 8.0.0 20171119 (experimental) (GCC)
-mtune=generic seems a better option for all three systems as a default for
-march=native
This is only with one test case (attached), but I've seen the same across many
other tests.
See the attached testcase (matix.c) and performance logs
Ryzen - znver1-tunebug.txt
Haswell - znver1-tunebug2.txt
Skylake - znver1-tunebug3.txt
>From gcc-bugs-return-582803-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 06:42:07 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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--- Comment #6 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 42687
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42687&action=edit
Test program used for the attached performance results (matrix.c)
Test program used for the attached performance results (matrix.c)
>From gcc-bugs-return-582804-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 06:43:14 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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--- Comment #7 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 42688
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42688&action=edit
Test results for Ryzen system with matrix.c
Test results for Ryzen system with matrix.c
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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--- Comment #8 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 42689
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42689&action=edit
Test results for Haswell system with matrix.c
Test results for Haswell system with matrix.c
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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--- Comment #9 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 42690
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42690&action=edit
Test results for Skylake system with matrix.c
Test results for Skylake system with matrix.c
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--- Comment #10 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 42691
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42691&action=edit
Script for matrix.c test program
Script for matrix.c test program
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Thu, 23 Nov 2017 07:54:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I've been also wondering if the ISA selection shouldn't affect -mtune=generic
tuning, say in TUs or even just functions that have AVX512* enabled the generic
tuning shouldn't be taken just from the set of CPUs that currently support that
ISA. Of course that would change once some AMD chips start supporting it.
>From gcc-bugs-return-582809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 08:18:36 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82248] probe_stack can generate unpredictable STR on arm
Date: Thu, 23 Nov 2017 08:18:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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See Also| |https://bugzilla.suse.com/s
| |how_bug.cgi?id=1068967
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Miscompiles mpfr for us on armv7. Isn't it easy enough to handle this in
the insn pattern by using some non pre/post-indexed memory_operand predicate
and or using an early clobbered match_scratch to allocate 'r0'?
>From gcc-bugs-return-582810-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 08:23:30 2017
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From: "lh_mouse at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83122] New: -Wconversion and shifting bitwise
Date: Thu, 23 Nov 2017 08:23:00 -0000
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Bug ID: 83122
Summary: -Wconversion and shifting bitwise
Product: gcc
Version: 7.2.0
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Minimal testcase:
```c
// gcc -c test.c -Wall -Wextra -pedantic -pedantic-errors -std=c99 -Wconversion
typedef __UINT64_TYPE__ uint64_t;
struct foo {
uint64_t a : 3;
uint64_t b : 61;
};
void set_a(struct foo *ptr, uint64_t val){
ptr->b = val >> 3;
}
```
The program above results in a warning about loss of precision:
```
test.c: In function 'set_a':
test.c:11:11: warning: conversion to 'long long unsigned int:61' from 'uint64_t
{aka long long unsigned int}' may alter its value [-Wconversion]
ptr->b = val >> 3;
^~~
```
This is a false positive since the 3 MSBs of `val` are filled with zeroes.
In reality, the warning persists even after I replace `val >> 3` with `val >>
63`.
>From gcc-bugs-return-582811-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 08:26:57 2017
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Subject: [Bug c/83123] New: Int compare - different asm code for different return type
Date: Thu, 23 Nov 2017 08:26:00 -0000
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type
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int test1(int a, int b)
{
return (a < 0) && (b < 0);
}
bool test2(int a, int b)
{
return (a < 0) && (b < 0);
}
This produces following code, when compiled with -O2. For some reason 2nd
function performs shifts first, then and. This is not necessary, you can and
first, then shift. The same issue is for checking if any of numbers is negative
- or can be executed first, then shift.
test1(int, int):
and esi, edi
mov eax, esi
shr eax, 31
ret
test2(int, int):
mov eax, edi
shr esi, 31
shr eax, 31
and eax, esi
ret
>From gcc-bugs-return-582812-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 08:28:13 2017
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Subject: [Bug tree-optimization/83089] [8 Regression] ICE: Segmentation fault (in instantiate_scev_name)
Date: Thu, 23 Nov 2017 08:28:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Nov 23 08:24:20 2017
New Revision: 255091
URL: https://gcc.gnu.org/viewcvs?rev=255091&root=gcc&view=rev
Log:
2017-11-23 Richard Biener <rguenther@suse.de>
PR tree-optimization/83089
* gcc.dg/pr83089.c: Require pthread.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pr83089.c
>From gcc-bugs-return-582813-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 08:32:49 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82050] [8 Regression] ICE on invalid code on x86_64-linux-gnu in column_range, at diagnostic-show-locus.c:1403
Date: Thu, 23 Nov 2017 08:32:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
In:
1418 static column_range
1419 get_affected_columns (const fixit_hint *hint)
1420 {
1421 int start_column = LOCATION_COLUMN (hint->get_start_loc ());
1422 int finish_column = LOCATION_COLUMN (hint->get_next_loc ()) - 1;
1423
1424 return column_range (start_column, finish_column);
(gdb) p hint->get_start_loc ()
$3 = 438112
(gdb) p hint->get_next_loc ()
$4 = 307392
(gdb) p expand_location ($3)
$5 = {file = 0x7fffffffe3d1 "pr82050.c", line = 14, column = 4086, data = 0x0,
sysp = false}
(gdb) p expand_location ($4)
$6 = {file = 0x7fffffffe3d1 "pr82050.c", line = 14, column = 1, data = 0x0,
sysp = false}
so finish_column is 0 and smaller than start_column, which is what column_range
ICEs on. Is that because we have:
/* Do not track column numbers higher than this one. As a result, the
range of column_bits is [12, 18] (or 0 if column numbers are
disabled). */
const unsigned int LINE_MAP_MAX_COLUMN_NUMBER = (1U << 12);
and thus effectively can only track columns up to 4095 (or 4096 if 1 based)?
If so, something should punt on it rather than ICE it is not possible.
>From gcc-bugs-return-582814-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 08:33:19 2017
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Subject: [Bug tree-optimization/81403] [8 Regression] wrong code at -O3
Date: Thu, 23 Nov 2017 08:33:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Nov 23 08:30:41 2017
New Revision: 255092
URL: https://gcc.gnu.org/viewcvs?rev=255092&root=gcc&view=rev
Log:
2017-11-23 Richard Biener <rguenther@suse.de>
PR tree-optimization/81403
* tree-ssa-pre.c (get_representative_for): Add parameter specifying
a block we need a leader relative to.
(phi_translate_1): For nary processing require a leader from
get_representative_for given we run expression simplification
using match-and-simplify. Remove previous fix.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-pre.c
>From gcc-bugs-return-582815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 08:37:49 2017
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From: "yangyibiao at nju dot edu.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/83124] New: wrong code on arm-linux-gnueabi-gcc with -O3 optimization
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Bug ID: 83124
Summary: wrong code on arm-linux-gnueabi-gcc with -O3
optimization
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this wrong code occurred while optimization flag "-O3" was used in
arm-linux-gnueabi-gcc
$ arm-linux-gnueabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc-cross/arm-linux-gnueabi/5/lto-wrapper
Target: arm-linux-gnueabi
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
5.4.0-6ubuntu1~16.04.4' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm
--disable-libquadmath --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-armel-cross/jre
--enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-armel-cross
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-armel-cross
--with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--disable-libgcj --enable-objc-gc --enable-multiarch --enable-multilib
--disable-sjlj-exceptions --with-arch=armv5t --with-float=soft --disable-werror
--enable-multilib --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=arm-linux-gnueabi
--program-prefix=arm-linux-gnueabi- --includedir=/usr/arm-linux-gnueabi/include
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4)
$ cat small.c
union {
unsigned short a
} b = {1};
*c = &b;
long *d = &b;
main() {
*d = 4294967295;
*c |= 55868;
printf("%X\n", b.a);
}
$ arm-linux-gnueabi-gcc -static -w -O3 small.c; ./a.out
DA3D
$ arm-linux-gnueabi-gcc -static -w -O0 small.c; ./a.out
FFFF
$ gcc -static -w -m32 -O0 small.c; ./a.out
FFFF
$ clang -static -w -m32 -O0 small.c; ./a.out
FFFF
>From gcc-bugs-return-582816-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 08:49:39 2017
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From: "dimhen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83125] New: [8 regeression] ICE in edge_badness, at ipa-inline.c:1025
Date: Thu, 23 Nov 2017 08:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83125
Bug ID: 83125
Summary: [8 regeression] ICE in edge_badness, at
ipa-inline.c:1025
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: dimhen at gmail dot com
CC: marxin at gcc dot gnu.org
Target Milestone: ---
r254663 PASS
r254924 FAIL
r255090 FAIL
sound similar to PR83001 and PR83051
PASS if I lower
-O level
or
--param early-inlining-insns value
or
--param max-early-inliner-iterations value
or
remove -fPIC -DPIC
$ g++ -Werror -Wall -O2 --param early-inlining-insns=36 --param
max-early-inliner-iterations=20 -std=c++98 -c -fpreprocessed x.ii -fPIC -DPIC
during IPA pass: inline
x.ii:43:10: internal compiler error: in edge_badness, at ipa-inline.c:1024
t::~t() {}
^
0x9e3f48 edge_badness
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1023
0x18e6859 update_edge_key
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1223
0x18e6d98 update_caller_keys
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1345
0x18e6cdb update_caller_keys
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1334
0x18e819b inline_small_functions
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:2051
0x18e819b ipa_inline
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:2442
0x18e819b execute
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:2849
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ cat x.ii
class a {
public:
void b(int *);
};
struct c {
c *d;
};
struct G : c {
int *e();
};
template <typename> struct f {
typedef G *h;
a i();
void j();
h k;
void l() {
int m = *k->e();
i().b(&m);
j();
}
void n(h);
~f() {
G o;
n(&o);
}
};
template <typename g> void f<g>::n(h p) {
h q, r = 0;
while (p) {
q = h(p->d);
n(q);
}
l();
p = r;
}
struct D {
f<int> s;
};
struct t {
~t();
D v;
};
t::~t() {}
$ gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc_current/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc_current/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
Target: x86_64-pc-linux-gnu
Configured with: /home/dimhen/src/gcc_current/configure
--prefix=/usr/local/gcc_current --enable-checking=yes,df,fold,rtl,extra
--enable-languages=c,c++,lto --disable-multilib --enable-shared
--enable-threads=posix --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl
--enable-libmpx --enable-offload-targets=nvptx-none --without-cuda-driver
--enable-gnu-indirect-function --with-tune=native
Thread model: posix
gcc version 8.0.0 20171123 (experimental) [trunk revision 255090] (GCC)
>From gcc-bugs-return-582817-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 08:52:43 2017
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Subject: [Bug ipa/83125] [8 regression] ICE in edge_badness, at ipa-inline.c:1025
Date: Thu, 23 Nov 2017 08:52:00 -0000
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--- Comment #1 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
(In reply to Dmitry G. Dyachenko from comment #0)
Stack for r255090
x.ii:43:10: internal compiler error: in edge_badness, at ipa-inline.c:1025
t::~t() {}
^
0x9e81af edge_badness
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1024
0x18f8049 update_edge_key
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1224
0x18f8588 update_caller_keys
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1346
0x18f84cb update_caller_keys
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1335
0x18f99cb inline_small_functions
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:2052
0x18f99cb ipa_inline
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:2443
0x18f99cb execute
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:2850
>From gcc-bugs-return-582818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:05:53 2017
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Subject: [Bug tree-optimization/23094] store ccp, or store copy prop misses an optimization
Date: Thu, 23 Nov 2017 09:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=23094
--- Comment #18 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Nov 23 09:05:11 2017
New Revision: 255093
URL: https://gcc.gnu.org/viewcvs?rev=255093&root=gcc&view=rev
Log:
2017-11-23 Richard Biener <rguenther@suse.de>
PR tree-optimization/23094
* tree-ssa-sccvn.c (vuse_ssa_val): Handle VN_TOP when we
come here from walking over backedges in the first iteration.
(vn_reference_lookup_3): Skip clobbers that store the same value.
* gcc.dg/tree-ssa/ssa-fre-61.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-61.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-582819-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:10:19 2017
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Subject: [Bug tree-optimization/40766] this fortran program is too slow
Date: Thu, 23 Nov 2017 09:10:00 -0000
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Janne Blomqvist <jb at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |INVALID
--- Comment #25 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Reducing N by a factor of 100 to make the test run faster, compiling with
-Ofast -march=native I get best-of-3 runs on
a) GCC trunk as of yesterday on x86_64 Ubuntu 16.04 (glibc 2.23), AMD
Phenom(tm) II X4 940:
- real(4) version: 6.16s
- real(8) version: 1.60s
b) GCC 7.2 from homebrew on macOS 10.12.6 (Sierra), 2 GHz Intel Core i7,
MacBook Air mid-2012:
- real(4) version: 0.768s
- real(8) version: 0.512s
Observations:
- The "perf" profiler on Linux shows that for the real version, 99% of the time
is spent in glibc libm, and for the real(8) version 97%.
- glibc has improved, now the real(4) version is a factor of 4 slower than the
real(8) one, rather than a factor of 10 as in the previous tests by Dominique
in 2013.
- If I remove the cos() call in the loop, it vectorizes with -mveclibabi=svml.
So no vectorized sincos yet.
Anyway, I'm not sure what the Fortran frontend could do better here. Mostly
it's a glibc issue. Hence, closing as invalid.
>From gcc-bugs-return-582820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:17:00 2017
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Subject: [Bug tree-optimization/23094] store ccp, or store copy prop misses an optimization
Date: Thu, 23 Nov 2017 09:17:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |8.0
Resolution|--- |FIXED
--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-582821-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:17:35 2017
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Subject: [Bug target/83117] FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test for excess errors)
Date: Thu, 23 Nov 2017 09:17:00 -0000
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--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Recently, compiler started to warn for:
--cut here--
extern long do_test_aligned ();
static long (*const do_test_v1) (long a, ...) = (void *) do_test_aligned;
extern void check_results (long);
int test (long a)
{
long ret;
ret = do_test_v1 (a);
check_results (ret);
}
--cut here--
gcc -O2:
fcast.c: In function ‘test’:
fcast.c:11:9: warning: function called through a non-compatible type
ret = do_test_v1 (a);
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-23
CC| |hjl.tools at gmail dot com
Ever confirmed|0 |1
Known to fail| |3.4.6
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Never worked. Not sure if this is invalid source or not.
>From gcc-bugs-return-582823-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:24:39 2017
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Subject: [Bug target/83111] [7/8 Regression][sh] stack smashing detected in gen_udivsi3
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug target/83114] [7/8 Regression] ICE in gen_vec_cmpv2dfv2di, at config/aarch64/aarch64-simd.md:2495
Date: Thu, 23 Nov 2017 09:24:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-582826-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:25:54 2017
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Subject: [Bug c++/83116] [6/7/8 Regression] Statement with no effect causes wrong code of static object constexpr method
Date: Thu, 23 Nov 2017 09:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target Milestone|--- |6.5
Summary|Statement with no effect |[6/7/8 Regression]
|causes wrong code of static |Statement with no effect
|object constexpr method |causes wrong code of static
| |object constexpr method
>From gcc-bugs-return-582825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:25:51 2017
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From: "ramana at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82248] probe_stack can generate unpredictable STR on arm
Date: Thu, 23 Nov 2017 09:25:00 -0000
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--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> Miscompiles mpfr for us on armv7. Isn't it easy enough to handle this in
> the insn pattern by using some non pre/post-indexed memory_operand predicate
> and or using an early clobbered match_scratch to allocate 'r0'?
I was testing a patch that used 'o' instead of 'm' in the constraint as that's
just an offsettable address and would prevent post/ pre-inc type operations but
it slipped through the cracks with travels in September :(
Can you test if that is sufficient for you or what's the runes in configure for
forcing probe_stack_range ?
regards
Ramana
>From gcc-bugs-return-582827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:26:56 2017
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Subject: [Bug target/83114] [7/8 Regression] ICE in gen_vec_cmpv2dfv2di, at config/aarch64/aarch64-simd.md:2495
Date: Thu, 23 Nov 2017 09:26:00 -0000
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
Doesn't need the -g either. Just -O3 is enough
>From gcc-bugs-return-582828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:28:57 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83117] FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test for excess errors)
Date: Thu, 23 Nov 2017 09:28:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-23
CC| |mpolacek at gcc dot gnu.org,
| |msebor at gcc dot gnu.org
Component|target |c
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks like a bogus warning to me.
extern long do_test_aligned ();
is not a prototype so
static long (*const do_test_v1) (long a, ...) = (void *) do_test_aligned;
is a way to provide one and the return type even matches.
>From gcc-bugs-return-582829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:33:15 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82248] probe_stack can generate unpredictable STR on arm
Date: Thu, 23 Nov 2017 09:33:00 -0000
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 23 Nov 2017, ramana at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82248
>
> --- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #2)
> > Miscompiles mpfr for us on armv7. Isn't it easy enough to handle this in
> > the insn pattern by using some non pre/post-indexed memory_operand predicate
> > and or using an early clobbered match_scratch to allocate 'r0'?
>
>
> I was testing a patch that used 'o' instead of 'm' in the constraint as that's
> just an offsettable address and would prevent post/ pre-inc type operations but
> it slipped through the cracks with travels in September :(
>
> Can you test if that is sufficient for you or what's the runes in configure for
> forcing probe_stack_range ?
Will do and report back.
>From gcc-bugs-return-582830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:43:28 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82848] [8 Regression] ICE in expand_expr_real_2, at expr.c:8715
Date: Thu, 23 Nov 2017 09:43:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42692
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42692&action=edit
gcc8-pr82848.patch
Untested fix. I think it is better to just punt on all the ones and get
diagnostics. Technically, the problem is mostly in stuff that
tree-vect-generic.c doesn't handle (FMA_EXPR, widening stuff, etc.), but I
think it is just wrong to error on something with -mno-fold-gimple and not with
-mfold-gimple.
>From gcc-bugs-return-582831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:50:03 2017
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Subject: [Bug rtl-optimization/82881] [8 Regression] ICE: in df_compact_blocks, at df-core.c:1729 with -freorder-blocks-algorithm=simple
Date: Thu, 23 Nov 2017 09:50:00 -0000
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Arseny Solokha <asolokha at gmx dot com> changed:
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----------------------------------------------------------------------------
CC| |asolokha at gmx dot com
--- Comment #3 from Arseny Solokha <asolokha at gmx dot com> ---
gcc-8.0.0-alpha20171119 snapshot (r254939) still fails:
% gcc-8.0.0-alpha20171119 -O2 -freorder-blocks-algorithm=simple -c testcase.c
during RTL pass: bbro
testcase.c: In function 'foo':
testcase.c:7:1: internal compiler error: in df_compact_blocks, at
df-core.c:1729
}
^
0x61f30e df_compact_blocks()
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/df-core.c:1729
0x1260035 compact_blocks()
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/cfg.c:160
0x1259dc2 reorder_basic_blocks
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/bb-reorder.c:2483
0x1259e42 execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/bb-reorder.c:2573
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Subject: [Bug rtl-optimization/82881] [8 Regression] ICE: in df_compact_blocks, at df-core.c:1729 with -freorder-blocks-algorithm=simple
Date: Thu, 23 Nov 2017 09:51:00 -0000
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--- Comment #4 from Arseny Solokha <asolokha at gmx dot com> ---
Unfortunately, I don't seem to have right permissions to reopen the PR.
>From gcc-bugs-return-582833-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:52:40 2017
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Subject: [Bug fortran/82814] ICE from submodule character function
Date: Thu, 23 Nov 2017 09:52:00 -0000
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--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Thu Nov 23 09:52:04 2017
New Revision: 255094
URL: https://gcc.gnu.org/viewcvs?rev=255094&root=gcc&view=rev
Log:
2017-11-23 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82814
* trans-types.c (gfc_sym_type): If a character function result
is missing the charlen backend_decl, use the one from the name-
space procedure symbol, if present.
2017-11-23 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82814
* gfortran.dg/submodule_31.f08: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/submodule_31.f08
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-types.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-582834-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 09:53:37 2017
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Subject: [Bug rtl-optimization/83124] wrong code on arm-linux-gnueabi-gcc with -O3 optimization
Date: Thu, 23 Nov 2017 09:53:00 -0000
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ktkachov at gcc dot gnu.org changed:
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CC| |ktkachov at gcc dot gnu.org
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--- Comment #1 from ktkachov at gcc dot gnu.org ---
The code has undefined behaviour.
If you remove the -w, two of the warnings are:
bad.c:5:10: warning: initialization of ‘int *’ from incompatible pointer type
‘union <anonymous> *’ [-Wincompatible-pointer-types]
int *c = &b;
^
bad.c:7:11: warning: initialization of ‘long int *’ from incompatible pointer
type ‘union <anonymous> *’ [-Wincompatible-pointer-types]
long *d = &b;
^
These break strict-aliasing rule.
So if you use -fno-strict-aliasing you'll get FFFF as the output at all
optimisation levels
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Subject: [Bug c/83117] [8 Regression] FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test for excess errors)
Date: Thu, 23 Nov 2017 09:55:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
Summary|FAIL: |[8 Regression] FAIL:
|gcc.target/x86_64/abi/ms-sy |gcc.target/x86_64/abi/ms-sy
|sv/ms-sysv.c (test for |sv/ms-sysv.c (test for
|excess errors) |excess errors)
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From: "ghjghj530-bubu at yahoo dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/83014] ICE in pretty-print with -fsanitize=bounds
Date: Thu, 23 Nov 2017 09:57:00 -0000
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--- Comment #7 from ghjghj530-bubu at yahoo dot de ---
I tried debugging the GCC today (not my strong side).
I ended up to extracte the call to cc1plus.exe and started GDB with cc1plus.exe
as target.
If i just run the process the ICE still occurs with the same information as
before: "internal compiler error: in pp_format, at pretty-print.c:630"
So i set a breakpoint at this location and printed the backtrace and some
variables:
Breakpoint 2, pp_format (pp=pp@entry=0xbd9fba8, text=text@entry=0xbd9faec) at
../../gcc-6.3.0/gcc/pretty-print.c:630
630 in ../../gcc-6.3.0/gcc/pretty-print.c
(gdb) bt
#0 pp_format (pp=pp@entry=0xbd9fba8, text=text@entry=0xbd9faec) at
../../gcc-6.3.0/gcc/pretty-print.c:630
#1 0x00f469ab in pp_printf (pp=pp@entry=0xbd9fba8, msg=msg@entry=0x116423d
<tsan_atomic_table+3037> "%I64d")
at ../../gcc-6.3.0/gcc/pretty-print.c:874
#2 0x009219b9 in ubsan_type_descriptor (type=<optimized out>,
type@entry=0xda193c0, pstyle=pstyle@entry=UBSAN_PRINT_ARRAY)
at ../../gcc-6.3.0/gcc/ubsan.c:416
#3 0x0092213a in ubsan_expand_bounds_ifn (gsi=gsi@entry=0xbd9fc9c) at
../../gcc-6.3.0/gcc/ubsan.c:693
#4 0x00927438 in (anonymous namespace)::pass_sanopt::execute (this=<optimized
out>, fun=0x14b068) at ../../gcc-6.3.0/gcc/sanopt.c:696
#5 0x0085c61a in execute_one_pass (pass=pass@entry=0x15d4e0) at
../../gcc-6.3.0/gcc/passes.c:2336
#6 0x0085cb78 in execute_pass_list_1 (pass=0x15d4e0, pass@entry=0x15a728) at
../../gcc-6.3.0/gcc/passes.c:2420
#7 0x0085cbd9 in execute_pass_list (fn=0x14b068, pass=0x15a728) at
../../gcc-6.3.0/gcc/passes.c:2431
#8 0x005f928f in cgraph_node::expand (this=0xda28000) at
../../gcc-6.3.0/gcc/cgraphunit.c:1982
#9 0x005f9e02 in output_in_order (no_reorder=no_reorder@entry=false) at
../../gcc-6.3.0/gcc/cgraphunit.c:2220
#10 0x005fa12c in symbol_table::compile (this=this@entry=0x14b000) at
../../gcc-6.3.0/gcc/cgraphunit.c:2468
#11 0x005fc097 in compile (this=0x14b000) at
../../gcc-6.3.0/gcc/cgraphunit.c:2538
#12 symbol_table::finalize_compilation_unit (this=0x14b000) at
../../gcc-6.3.0/gcc/cgraphunit.c:2564
#13 0x009085a5 in compile_file () at ../../gcc-6.3.0/gcc/toplev.c:488
#14 0x0109b23a in do_compile () at ../../gcc-6.3.0/gcc/toplev.c:1986
#15 toplev::main (this=this@entry=0xbd9ff1e, argc=argc@entry=14,
argv=argv@entry=0xc212ff0) at ../../gcc-6.3.0/gcc/toplev.c:2094
#16 0x010b2fb6 in main (argc=14, argv=0xc212ff0) at
../../gcc-6.3.0/gcc/main.c:39
(gdb) p pp->format_decoder
$11 = (printer_fn) 0x0
(gdb) p pp
$12 = (pretty_printer *) 0xbd9fba8
(gdb)
Continuing at this position leads to the ICE
Does this help in any way? How can i contribute more information?
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Subject: [Bug c++/83121] [8 Regression] ICE: in linemap_ordinary_map_lookup, at libcpp/line-map.c:995
Date: Thu, 23 Nov 2017 10:05:00 -0000
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--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 42693
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42693&action=edit
reduced testcase
trippels@gcc67 ~ % g++ -g -flto -r -nostdlib -O2 test_environment.ii
node_buffer.ii
node_buffer.ii:98:10: warning: type ‘struct AsyncHooks’ violates the C++ One
Definition Rule [-Wodr]
struct AsyncHooks {
^
test_environment.ii:117:10: note: a different type is defined in another
translation unit
struct AsyncHooks {
^
node_buffer.ii:99:39: note: the first difference of corresponding definitions
is field ‘providers_’
int providers_[B::PROVIDERS_LENGTH];
^
test_environment.ii:118:67: note: a field of same name but different type is
defined in another translation unit
v8::Eternal<v8::String> providers_[AsyncWrap::PROVIDERS_LENGTH];
^
lto1: internal compiler error: in linemap_ordinary_map_lookup, at
libcpp/line-map.c:995
0x139f7a4 linemap_ordinary_map_lookup
../../gcc/libcpp/line-map.c:995
0x139f7a4 linemap_lookup(line_maps*, unsigned int)
../../gcc/libcpp/line-map.c:948
0x13a068b linemap_macro_loc_to_def_point
../../gcc/libcpp/line-map.c:1453
0x13a068b linemap_resolve_location(line_maps*, unsigned int,
location_resolution_kind, line_map_ordinary const**)
../../gcc/libcpp/line-map.c:1585
0x136bb45 diagnostic_report_current_module(diagnostic_context*, unsigned int)
../../gcc/gcc/diagnostic.c:581
0xb0a6b1 diagnostic_report_current_function(diagnostic_context*,
diagnostic_info*)
../../gcc/gcc/tree-diagnostic.c:39
0xb0a6f0 default_tree_diagnostic_starter
../../gcc/gcc/tree-diagnostic.c:48
0x136a48a diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
../../gcc/gcc/diagnostic.c:985
0x136a84e diagnostic_impl
../../gcc/gcc/diagnostic.c:1108
0x136aa98 inform(unsigned int, char const*, ...)
../../gcc/gcc/diagnostic.c:1160
0x895b21 odr_types_equivalent_p
../../gcc/gcc/ipa-devirt.c:1569
0x89664e add_type_duplicate
../../gcc/gcc/ipa-devirt.c:1848
0x89664e get_odr_type(tree_node*, bool)
../../gcc/gcc/ipa-devirt.c:2028
0x89b9e4 odr_subtypes_equivalent_p
../../gcc/gcc/ipa-devirt.c:689
0x895740 odr_types_equivalent_p
../../gcc/gcc/ipa-devirt.c:1556
0x89664e add_type_duplicate
../../gcc/gcc/ipa-devirt.c:1848
0x89664e get_odr_type(tree_node*, bool)
../../gcc/gcc/ipa-devirt.c:2028
0x89bbd9 register_odr_type(tree_node*)
../../gcc/gcc/ipa-devirt.c:2111
0x5efea7 lto_read_decls
../../gcc/gcc/lto/lto.c:1748
0x5f14d4 lto_file_finalize
../../gcc/gcc/lto/lto.c:2048
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper: fatal error: g++ returned 1 exit status
compilation terminated.
/home/trippels/bin/ld: fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status
Also happens without -g -O2:
~ % g++ -flto -r -nostdlib test_environment.ii node_buffer.ii
>From gcc-bugs-return-582838-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 10:07:59 2017
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Subject: [Bug middle-end/70773] Profiled sudoku solver slower due to lack of sdiv/udiv
Date: Thu, 23 Nov 2017 10:07:00 -0000
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--- Comment #19 from PeteVine <tulipawn at gmail dot com> ---
Created attachment 42694
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42694&action=edit
Better assembly after profiling
>From gcc-bugs-return-582839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 10:09:15 2017
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Subject: [Bug target/83111] [7/8 Regression][sh] stack smashing detected in gen_udivsi3
Date: Thu, 23 Nov 2017 10:09:00 -0000
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #4)
> Thanks for reporting and tracking this down.
> It seems there more such traps. Can you please try the following:
I've done an sh-elf build using this patch, and that went ok.
FWIW, I've also done an sh-unknown-linux-gnu build and that gets as far as it
can get without an sh runtime installation.
I don't have a complete sh build and test setup. Somebody needs to build and
test this patch for the sh target.
>From gcc-bugs-return-582840-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 10:09:27 2017
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Subject: [Bug middle-end/70773] Profiled sudoku solver slower due to lack of sdiv/udiv
Date: Thu, 23 Nov 2017 10:09:00 -0000
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PeteVine <tulipawn at gmail dot com> changed:
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #20 from PeteVine <tulipawn at gmail dot com> ---
The bug doesn't reproduce in a recent GCC 8 build (profiling on a Cortex A5
system).
The generated assembly contains no __aeabi_idiv calls whatsoever. Well done.
>From gcc-bugs-return-582841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 10:25:30 2017
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Subject: [Bug libfortran/83097] Use __BYTE_ORDER__ instead of runtime test
Date: Thu, 23 Nov 2017 10:25:00 -0000
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--- Comment #4 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Actually, I think it's for big endian we could optimize memcmp_char4. In the
example Thomas posted on the mailing list, one must also check the sign of
memcmp, not just whether it's != 0. Fixed example:
#include <stdio.h>
#include <string.h>
char a[4] = { 1, 2, 3, 4};
char b[4] = { 4, 3, 2, 1};
int main()
{
int i, j;
memcpy (&i, a, sizeof(i));
memcpy (&j, b, sizeof(j));
printf("memcmp : ");
if (memcmp (&i,&j,sizeof(i)) > 0)
printf("larger\n");
else
printf("smaller or equal\n");
printf("Direct comparison: ");
if (i > j)
printf("larger\n");
else
printf("smaller or equal\n");
return 0;
}
On a little endian system this prints:
memcmp : smaller or equal
Direct comparison: larger
Since most targets of interest for GFortran usage are little endian (x86, arm,
ppc64le) I'm not sure it's worth the bother to do the memcmp_char4
optimization.
>From gcc-bugs-return-582842-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 10:35:10 2017
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Subject: [Bug libstdc++/83120] [8 Regression] ext/special_functions/hyperg failure on AIX
Date: Thu, 23 Nov 2017 10:35:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Also fails for me on x86_64-linux with -m32:
=== libstdc++ Summary for unix/ ===
# of expected passes 12775
# of expected failures 70
# of unsupported tests 256
Running target unix//-m32
FAIL: ext/special_functions/hyperg/check_value.cc execution test
FAIL: tr1/5_numerical_facilities/special_functions/17_hyperg/check_value.cc
exec
ution test
=== libstdc++ Summary for unix//-m32 ===
# of expected passes 12781
# of unexpected failures 2
# of expected failures 70
# of unsupported tests 252
sounds more like a testsuite issue to me not properly allowing for an epsilon
(excess precision, yadda yadda)
>From gcc-bugs-return-582843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 10:37:00 2017
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Subject: [Bug lto/83121] [8 Regression] ICE: in linemap_ordinary_map_lookup, at libcpp/line-map.c:995
Date: Thu, 23 Nov 2017 10:36:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |lto
Target Milestone|--- |8.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Probably a latent issue. Always smells like mixed up BLOCKs :/
>From gcc-bugs-return-582844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 10:38:32 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/83122] -Wconversion and shifting bitwise
Date: Thu, 23 Nov 2017 10:38:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2017-11-23
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. The same probably happens with a division.
Note it might be an inherent limitation of the warning given apart from some
simple cases like yours we can't really tell the value range of the stored
value. This is why it says "may" alter its value.
>From gcc-bugs-return-582846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 10:44:37 2017
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Subject: [Bug ipa/83125] [8 regression] ICE in edge_badness, at ipa-inline.c:1025
Date: Thu, 23 Nov 2017 10:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83125
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/83123] Int compare - different asm code for different return type
Date: Thu, 23 Nov 2017 10:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83123
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |x86_64-*-*, i?86-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-23
CC| |segher at gcc dot gnu.org
Component|c |rtl-optimization
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The first case is somehow optimized by combine while the latter is not.
The gimple is almost equal, so is the expanded RTL.
test1 (int a, int b)
{
_Bool _1;
_Bool _2;
_Bool _3;
int _6;
<bb 2> [local count: 1073741825]:
_1 = a_4(D) < 0;
_2 = b_5(D) < 0;
_3 = _1 & _2;
_6 = (int) _3;
return _6;
test2 (int a, int b)
{
_Bool _1;
_Bool _2;
_Bool _3;
<bb 2> [local count: 1073741825]:
_1 = a_4(D) < 0;
_2 = b_5(D) < 0;
_3 = _1 & _2;
return _3;
>From gcc-bugs-return-582847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 11:04:24 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70773] Profiled sudoku solver slower due to lack of sdiv/udiv
Date: Thu, 23 Nov 2017 11:04:00 -0000
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
--- Comment #21 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Though I don't know what exactly "fixed" this mark it as fixed for GCC 8 as per
reporter.
>From gcc-bugs-return-582848-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 11:09:00 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/83121] [8 Regression] ICE: in linemap_ordinary_map_lookup, at libcpp/line-map.c:995
Date: Thu, 23 Nov 2017 11:09:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-23
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Strangely, it started with r255066.
>From gcc-bugs-return-582849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 11:10:00 2017
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83126] New: [8 Regression] ICE in transform_to_exit_first_loop_alt, at tree-parloops.c:1713
Date: Thu, 23 Nov 2017 11:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83126
Bug ID: 83126
Summary: [8 Regression] ICE in
transform_to_exit_first_loop_alt, at
tree-parloops.c:1713
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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Priority: P3
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Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-8.0.0-alpha20171119 snapshot (r254939) ICEs when compiling the following
snippet w/ -O1 -ftree-parallelize-loops=2 -floop-parallelize-all:
void
ew (unsigned short int c9)
{
int e1;
for (;;)
{
unsigned int *by = &e1;
int *fd;
*fd = c9;
fd = *fd;
if (*fd != 0)
for (*by = 0; *by < 2; ++*by)
c9 *= e1;
}
}
% gcc-8.0.0-alpha20171119 -O1 -ftree-parallelize-loops=2 -floop-parallelize-all
-w -c dbuks5p2.c
during GIMPLE pass: parloops
dbuks5p2.c: In function 'ew':
dbuks5p2.c:2:1: internal compiler error: in transform_to_exit_first_loop_alt,
at tree-parloops.c:1713
ew (unsigned short int c9)
^~
0xcf558a transform_to_exit_first_loop_alt
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-parloops.c:1711
0xcf5eac try_transform_to_exit_first_loop_alt
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-parloops.c:1835
0xcf7d45 gen_parallel_loop
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-parloops.c:2379
0xcf826c parallelize_loops
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-parloops.c:3366
0xcf852f execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-parloops.c:3448
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From: "lh_mouse at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/83122] -Wconversion and shifting bitwise
Date: Thu, 23 Nov 2017 11:11:00 -0000
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--- Comment #2 from Liu Hao <lh_mouse at 126 dot com> ---
Yes it is hard to tell whether there is indeed loss of precision.
At the moment, the (only?) redictable way to silence the warning is to use a
bitwise and operation. That is, `ptr->b = (val >> 3) & (UINT64_MAX >> 3)`.
>From gcc-bugs-return-582851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 11:19:40 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/83014] ICE in pretty-print with -fsanitize=bounds
Date: Thu, 23 Nov 2017 11:19:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42695
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42695&action=edit
gcc8-pr83014.patch
Untested fix. I believe this is because on mingw host HOST_LONG_LONG_FORMAT
is redefined to "I64", but that is a Microsoft-ism that pp_printf of course
doesn't handle. pp_unsigned_wide_integer or pp_scalar it uses should handle
this fine by using the host sprintf into a temporary buffer and then just
appending the digit buffer.
As this needs mingw host, I can't really test whether it fixes this though, can
only bootstrap/regtest it on linux.
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From: "ramana at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82975] ICE in baseness at rtlanal.c:6220
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ramana at gcc dot gnu.org
--- Comment #1 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Can you put the output of arm-none-linux-gnueabi-gcc -v ? What's the
cross-compiler been configured with ?
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/83127] New: Missing overload for operator << of std::stringstream for old ABI
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Bug ID: 83127
Summary: Missing overload for operator << of std::stringstream
for old ABI
Product: gcc
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Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: ghjghj530-bubu at yahoo dot de
Target Milestone: ---
Compiling the following testcode
#include <string>
#include <sstream>
void Main(void)
{
std::string testStr("Hello");
std::string testStr2("World");
std::stringstream ss;
ss << testStr;
testStr2 = ss.str();
}
with flag: -D_GLIBCXX_USE_CXX11_ABI=0 leads to linker error:
undefined reference to `std::basic_ostream<char, std::char_traits<char> >&
std::operator<< <char, std::char_traits<char>, std::allocator<char>
>(std::basic_ostream<char, std::char_traits<char> >&, std::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&)'
Setting -D_GLIBCXX_USE_CXX11_ABI=1 fixes the bug.
We narrowed the problem down to a missing overload in libstdc++.a using:
nm.exe -gC "libstdc++.a" > libstdc++.a.out
There is only one overload for operator << and string:
"std::__cxx11::basic_string"
00000000 W std::basic_ostream<char, std::char_traits<char> >& std::operator<<
<char, std::char_traits<char>, std::allocator<char> >(std::basic_ostream<char,
std::char_traits<char> >&, std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&)
But two overloads for operator >>:
"std::__cxx11::basic_string" and "std::basic_string"
00000000 W std::basic_istream<wchar_t, std::char_traits<wchar_t> >&
std::operator>><wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t>
>(std::basic_istream<wchar_t, std::char_traits<wchar_t> >&,
std::__cxx11::basic_string<wchar_t, std::char_traits<wchar_t>,
std::allocator<wchar_t> >&)
00000000 W std::basic_istream<wchar_t, std::char_traits<wchar_t> >&
std::operator>><wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t>
>(std::basic_istream<wchar_t, std::char_traits<wchar_t> >&,
std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t>
>&)
>From gcc-bugs-return-582855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 11:27:48 2017
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Subject: [Bug middle-end/82253] [6/7 Regression] ICE in convert_move, at expr.c:604
Date: Thu, 23 Nov 2017 11:27:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7/8 Regression] ICE in |[6/7 Regression] ICE in
|convert_move, at expr.c:604 |convert_move, at expr.c:604
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Subject: [Bug middle-end/82253] [6/7/8 Regression] ICE in convert_move, at expr.c:604
Date: Thu, 23 Nov 2017 11:27:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Nov 23 11:26:32 2017
New Revision: 255095
URL: https://gcc.gnu.org/viewcvs?rev=255095&root=gcc&view=rev
Log:
PR middle-end/82253
* expr.c (expand_assignment): For CONCAT to_rtx, complex type from and
bitpos/bitsize covering the whole destination, use store_expr only if
the complex mode is the same. Otherwise, use expand_normal and if
it returns CONCAT, subreg each part separately instead of trying to
subreg the whole result.
* gfortran.dg/pr82253.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr82253.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expr.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-582856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 11:34:27 2017
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Subject: [Bug rtl-optimization/83124] wrong code on arm-linux-gnueabi-gcc with -O3 optimization
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--- Comment #2 from Yibiao Yang <yangyibiao at nju dot edu.cn> ---
Thanks and Very sorry for this wrong bug report.
(In reply to ktkachov from comment #1)
> The code has undefined behaviour.
> If you remove the -w, two of the warnings are:
> bad.c:5:10: warning: initialization of ‘int *’ from incompatible pointer
> type ‘union <anonymous> *’ [-Wincompatible-pointer-types]
> int *c = &b;
> ^
> bad.c:7:11: warning: initialization of ‘long int *’ from incompatible
> pointer type ‘union <anonymous> *’ [-Wincompatible-pointer-types]
> long *d = &b;
> ^
>
> These break strict-aliasing rule.
> So if you use -fno-strict-aliasing you'll get FFFF as the output at all
> optimisation levels
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Subject: [Bug c++/81888] [7/8 Regression] Structured bindings stopped working
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with my r249947 aka PR81258 fix.
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Subject: [Bug target/82989] [7/8 regression ] Inexplicable use of NEON for 64-bit math
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--- Comment #2 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Works as expected in GCC 6.
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Subject: [Bug target/82989] [7/8 regression ] Inexplicable use of NEON for 64-bit math
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-23
CC| |ramana at gcc dot gnu.org
Summary|Inexplicable use of NEON |[7/8 regression ]
|for 64-bit math |Inexplicable use of NEON
| |for 64-bit math
Ever confirmed|0 |1
Known to fail| |7.2.1, 8.0
--- Comment #1 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug target/82975] ICE in baseness at rtlanal.c:6220
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----------------------------------------------------------------------------
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--- Comment #2 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
$CC -S -O2 -mtune=cortex-a57 -fno-sched-pressure -mfpu=neon -mfloat-abi=softfp
-O3 /work/wa3/src/gcc/gcc/testsuite/gcc.target/i386/pr78904-6.c
Confirmed.
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Subject: [Bug target/82974] [8 regression] ICE in extract_insn, at recog.c:2305 on aarch64
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Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-23
CC| |ramana at gcc dot gnu.org
Version|7.0 |c++-concepts
Summary|ICE in extract_insn, at |[8 regression] ICE in
|recog.c:2305 on aarch64 |extract_insn, at
| |recog.c:2305 on aarch64
Ever confirmed|0 |1
--- Comment #1 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
I can't provoke the latest tip of GCC7 to ICE but GCC 8 does ICE.
>From gcc-bugs-return-582862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 12:51:57 2017
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Subject: [Bug fortran/82973] [8 regression] ICE in output_constant_pool_2, at varasm.c:3896 on aarch64
Date: Thu, 23 Nov 2017 12:51:00 -0000
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ramana at gcc dot gnu.org
Summary|ICE in |[8 regression] ICE in
|output_constant_pool_2, at |output_constant_pool_2, at
|varasm.c:3896 on aarch64 |varasm.c:3896 on aarch64
--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Confirmed.
I can't provoke this on GCC 7 though. Are you sure this is coming out GCC 7
rather than trunk ?
>From gcc-bugs-return-582863-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 13:00:41 2017
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Subject: [Bug tree-optimization/83126] [8 Regression] ICE in transform_to_exit_first_loop_alt, at tree-parloops.c:1713
Date: Thu, 23 Nov 2017 13:00:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
>From gcc-bugs-return-582864-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 13:08:29 2017
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Subject: [Bug libstdc++/83127] Missing overload for operator << of std::stringstream for old ABI
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
What is void Main(void) ? Is this using mingw or something?
Please provide the missing information as requested by https://gcc.gnu.org/bugs
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Subject: [Bug libstdc++/83127] Missing overload for operator << of std::stringstream for old ABI
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It links fine on GNU/Linux using a standard start function, int main().
>From gcc-bugs-return-582866-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 13:16:17 2017
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Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
As I said in the other bug we're seeing
real(real64), dimension(nsplit) :: tmp
as "shared" amongst the outer loop iterations.
It seems it is constructed that way by the frontend though:
MAIN__ ()
{
...
real(kind=8) A.11[4];
...
atmp.10.dtype = 537;
atmp.10.dim[0].stride = 1;
atmp.10.dim[0].lbound = 0;
atmp.10.dim[0].ubound = 3;
atmp.10.data = &A.11;
atmp.10.offset = 0;
compute (&atmp.10, _73, _74); [static-chain: &FRAME.22]
and
compute (struct array1_real(kind=8) & __result, integer(kind=8) & restrict low,
integer(kind=8) & restrict high)
{
real(kind=8)[0:D.3540] * restrict __result.0;
so each invocation gets the same local array in MAIN__.
Not sure if you need to mark compute somehow to avoid this and the testcase
is invalid fortran or if the frontend is at fault.
>From gcc-bugs-return-582867-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 13:21:27 2017
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From: "denis.campredon at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83128] New: Unable to optimize {m,c}alloc when strings builtin are used
Date: Thu, 23 Nov 2017 13:21:00 -0000
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Bug ID: 83128
Summary: Unable to optimize {m,c}alloc when strings builtin are
used
Product: gcc
Version: unknown
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Currently gcc with -03 is able to optimize
----------
char f() {
char * i = (char*)__builtin_malloc(100);
i[0] = 'a';
return i[0];
}
----------
to
----------
mov al, 97
ret
But is unable to do the same when string builtins are used with either malloc
or calloc.
---------
char f() {
char * i = (char*)__builtin_malloc(100);
__builtin_memcpy(i, "a", 1);
return i[0];
}
---------
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #15 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I believe it was done before the inliner change, but i am now trying to
reproduce it on yttrium. It is bad idea to use periodic benchmarking machine
for random bootstraps anyway.
Thanks for the info and pointer to working itanium box!
>From gcc-bugs-return-582869-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 13:39:08 2017
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Subject: [Bug tree-optimization/83129] New: calloc zero initialization is not taken into account by gcc
Date: Thu, 23 Nov 2017 13:39:00 -0000
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Bug ID: 83129
Summary: calloc zero initialization is not taken into account
by gcc
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It seems that GCC does not know that calloc initialize the memory to zero.
The the following functions could be optimized to the same assemble, but only
f3 is optimized to:
xor eax, eax
ret
--------------
int f1() {
char * i = __builtin_calloc(1, 1);
return *i;
}
int f2() {
struct s{int i;}* a = __builtin_calloc(1, sizeof(*a));
return a->i;
}
int f3() {
char * i = (char*)__builtin_calloc(1, 1);
i[0] = 0;
return *i;
}
--------------
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Subject: [Bug c++/83130] New: Compilation error related to 'using', template instantiations and default constructors
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83130
Bug ID: 83130
Summary: Compilation error related to 'using', template
instantiations and default constructors
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: nadult at fastmail dot fm
Target Milestone: ---
The following code fails to compile on new GCC (7.1, 7.2, 8.0). It compiles
without any problems on Clang. Compiled with: -std=c++1z
#include <utility>
template <class T> struct ValueBase {
ValueBase() {}
ValueBase(const ValueBase &src) {}
ValueBase(ValueBase &&src) {}
void operator=(ValueBase &&src) {}
void operator=(const ValueBase &src) {}
};
template <class T> struct Value : public ValueBase<T> {
Value(void *) {}
using ValueBase<T>::ValueBase;
using ValueBase<T>::operator=;
};
struct MyObj {
MyObj();
MyObj(const MyObj &);
struct Impl {
// Uncomment these lines to make the bug go away:
//Impl() = default;
//Impl(const Impl &) = default;
Value<double> value;
};
std::pair<Impl, Impl> pair;
};
MyObj::MyObj(const MyObj &) = default;
void someFunc() {
std::pair<MyObj::Impl, MyObj::Impl> impl;
// Comment this line to make the bug go away
impl.first.value = nullptr;
}
>From gcc-bugs-return-582871-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 13:46:40 2017
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Subject: [Bug c++/83130] Compilation error related to 'using', template instantiations and default constructors
Date: Thu, 23 Nov 2017 13:46:00 -0000
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--- Comment #1 from Krzysztof Jakubowski <nadult at fastmail dot fm> ---
someFunc() at the bottom is unnecessary.
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Subject: [Bug target/83111] [7/8 Regression][sh] stack smashing detected in gen_udivsi3
Date: Thu, 23 Nov 2017 14:06:00 -0000
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--- Comment #6 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Thu Nov 23 14:06:15 2017
New Revision: 255096
URL: https://gcc.gnu.org/viewcvs?rev=255096&root=gcc&view=rev
Log:
gcc/
PR target/83111
* config/sh/sh.md (udivsi3, divsi3, sibcall_value_pcrel,
sibcall_value_pcrel_fdpic): Use local variable instead of
operands[3].
(calli_tbr_rel): Add missing operand 2.
(call_valuei_tbr_rel): Add missing operand 3.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sh/sh.md
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Subject: [Bug target/83111] [7/8 Regression][sh] stack smashing detected in gen_udivsi3
Date: Thu, 23 Nov 2017 14:08:00 -0000
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--- Comment #7 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Thu Nov 23 14:08:12 2017
New Revision: 255097
URL: https://gcc.gnu.org/viewcvs?rev=255097&root=gcc&view=rev
Log:
gcc/
Backport from mainline
2017-11-23 Oleg Endo <olegendo@gcc.gnu.org>
PR target/83111
* config/sh/sh.md (udivsi3, divsi3, sibcall_value_pcrel,
sibcall_value_pcrel_fdpic): Use local variable instead of
operands[3].
(calli_tbr_rel): Add missing operand 2.
(call_valuei_tbr_rel): Add missing operand 3.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/sh/sh.md
>From gcc-bugs-return-582874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 14:11:50 2017
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Subject: [Bug target/83111] [7/8 Regression][sh] stack smashing detected in gen_udivsi3
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Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Fixed on GCC 7 and GCC 8.
>From gcc-bugs-return-582875-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 14:36:30 2017
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Subject: [Bug c++/81888] [7/8 Regression] Structured bindings stopped working
Date: Thu, 23 Nov 2017 14:36:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42696
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42696&action=edit
gcc8-pr81888.patch
Untested fix.
>From gcc-bugs-return-582876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 14:50:36 2017
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Subject: [Bug c++/83116] [6/7/8 Regression] Statement with no effect causes wrong code of static object constexpr method
Date: Thu, 23 Nov 2017 14:50:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-23
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r230365.
Guess we need to remove the static var from constexpr caches at the end of
construction if the var isn't constexpr.
Testcase modified for the testsuite:
// PR c++/83116
// { dg-do run { target c++14 } }
struct S {
constexpr S () : s(0) { foo (); }
constexpr int foo () { return s; }
int s;
};
int
main ()
{
static S var;
var.s = 5;
if (var.s != 5 || var.foo () != 5)
__builtin_abort ();
}
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From: "ghjghj530-bubu at yahoo dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/83127] Missing overload for operator << of std::stringstream for old ABI
Date: Thu, 23 Nov 2017 14:55:00 -0000
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--- Comment #3 from ghjghj530-bubu at yahoo dot de ---
Changed my testcode to int main(). The error stil occurs.
The system is Windows 7, 64 bit, mingw.
Is use the GCC in a company-specific enviroment with some customized
linkersripts.
We first compile the source file with:
i686-elf-gcc.exe -c C:\temp\2\Main.cpp -o c:\temp\2\Main.cpp.o
-D_GLIBCXX_USE_CXX11_ABI=0
and then call the linker:
i686-elf-gcc.exe C:\Temp\2\Main.cpp.o -o C:\Temp\2\a.out
-Wl,-lstdc++,-lsupc++,-lm -lc
(i have removed a -specs paramter and some target plattform specific
parameters).
I'm sorry for the incomplete command line.
I still hope the *.a-File analysis from my original post can help you.
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Subject: [Bug tree-optimization/83128] Unable to optimize {m,c}alloc when strings builtin are used
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-23
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
Index: gcc/tree-ssa-sccvn.c
===================================================================
--- gcc/tree-ssa-sccvn.c (revision 255093)
+++ gcc/tree-ssa-sccvn.c (working copy)
@@ -1388,10 +1388,14 @@ fully_constant_vn_reference_p (vn_refere
else if (base->opcode == MEM_REF
&& base[1].opcode == ADDR_EXPR
&& (TREE_CODE (TREE_OPERAND (base[1].op0, 0)) == VAR_DECL
- || TREE_CODE (TREE_OPERAND (base[1].op0, 0)) == CONST_DECL))
+ || TREE_CODE (TREE_OPERAND (base[1].op0, 0)) == CONST_DECL
+ || TREE_CODE (TREE_OPERAND (base[1].op0, 0)) == STRING_CST))
{
decl = TREE_OPERAND (base[1].op0, 0);
- ctor = ctor_for_folding (decl);
+ if (TREE_CODE (decl) == STRING_CST)
+ ctor = decl;
+ else
+ ctor = ctor_for_folding (decl);
}
if (ctor == NULL_TREE)
return build_zero_cst (ref->type);
@@ -2331,7 +2335,8 @@ vn_reference_lookup_3 (ao_ref *ref, tree
rhs = TREE_OPERAND (tem, 0);
rhs_offset += tree_to_uhwi (TREE_OPERAND (tem, 1));
}
- else if (DECL_P (tem))
+ else if (DECL_P (tem)
+ || TREE_CODE (tem) == STRING_CST)
rhs = build_fold_addr_expr (tem);
else
return (void *)-1;
>From gcc-bugs-return-582880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 15:12:41 2017
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Subject: [Bug testsuite/83131] c-c++/common/attr-nonstring-3 failure for strcmp tests on PowerPC
Date: Thu, 23 Nov 2017 15:12:00 -0000
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David Edelsohn <dje at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from David Edelsohn <dje at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-582879-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 15:12:28 2017
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Subject: [Bug testsuite/83131] New: c-c++/common/attr-nonstring-3 failure for strcmp tests on PowerPC
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Bug ID: 83131
Summary: c-c++/common/attr-nonstring-3 failure for strcmp tests
on PowerPC
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: dje at gcc dot gnu.org
Target Milestone: ---
Target: powerpc*-*-*
New testcase failure on PowerPC (Linux and AIX)
FAIL: c-c++-common/attr-nonstring-3.c -std=gnu++98 (test for warnings, line
149)
FAIL: c-c++-common/attr-nonstring-3.c -std=gnu++98 (test for warnings, line
150)
FAIL: c-c++-common/attr-nonstring-3.c -std=gnu++98 (test for warnings, line
153)
FAIL: c-c++-common/attr-nonstring-3.c -std=gnu++98 (test for warnings, line
154)
FAIL: c-c++-common/attr-nonstring-3.c -std=gnu++98 (test for warnings, line
156)
FAIL: c-c++-common/attr-nonstring-3.c -std=gnu++98 (test for warnings, line
157)
FAIL: c-c++-common/attr-nonstring-3.c -std=gnu++98 (test for warnings, line
158)
FAIL: c-c++-common/attr-nonstring-3.c -std=gnu++98 (test for warnings, line
168)
FAIL: c-c++-common/attr-nonstring-3.c -std=gnu++98 (test for warnings, line
169)
gnu++11, gnu++14, c
149-169 correspond to the line-specific strcmp and strncmp tests in the
testcase.
>From gcc-bugs-return-582881-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 15:13:49 2017
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Subject: [Bug c++/83116] [6/7/8 Regression] Statement with no effect causes wrong code of static object constexpr method
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
No idea where though.
>From gcc-bugs-return-582882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 15:15:31 2017
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Subject: [Bug rtl-optimization/83098] [8 regression] ICE in assert_rtx_eq_at, at selftest-rtl.c:57
Date: Thu, 23 Nov 2017 15:15:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
If you are into make check, then self test already passed, right?
Thus, can this be closed as fixed?
>From gcc-bugs-return-582883-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 15:16:51 2017
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Subject: [Bug rtl-optimization/83098] [8 regression] ICE in assert_rtx_eq_at, at selftest-rtl.c:57
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Rainer Orth <ro at gcc dot gnu.org> ---
Of course. Sorry I forgot.
>From gcc-bugs-return-582884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 15:20:39 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82050] [8 Regression] ICE on invalid code on x86_64-linux-gnu in column_range, at diagnostic-show-locus.c:1403
Date: Thu, 23 Nov 2017 15:20:00 -0000
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--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
I attempted to copy&paste from comment #0, but couldn't reproduce the ICE
(possibly a spaces vs tabs thing?)
Jakub: please can you attach the reproducer file, and I'll take this. Thanks.
>From gcc-bugs-return-582885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 15:35:08 2017
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From: "siddhesh at gotplt dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
Date: Thu, 23 Nov 2017 15:35:00 -0000
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--- Comment #4 from Siddhesh Poyarekar <siddhesh at gotplt dot org> ---
Reduced C test case:
#define MAX 98
void foo (unsigned long *res, unsigned long in)
{
for (unsigned long a = 0; a < MAX; a++)
for (unsigned long b = 0; b < MAX; b++)
for (unsigned long c = 0; c < MAX; c++)
for (unsigned long d = 0; d < MAX; d++)
for (unsigned long e = 0; e < MAX; e++)
for (unsigned long f = 0; f < MAX; f++)
for (unsigned long g = 0; g < MAX; g++)
*res += a * in;
}
foo.c: In function 'foo':
foo.c:13:1: internal compiler error: in from_gcov_type, at profile-count.h:676
}
^
0xaaf57f profile_count::from_gcov_type(long)
/home/siddhesh/src/gcc/gcc/profile-count.h:676
0xaaf57f estimate_bb_frequencies(bool)
/home/siddhesh/src/gcc/gcc/predict.c:3623
0xab40af tree_estimate_probability(bool)
/home/siddhesh/src/gcc/gcc/predict.c:2849
0xab45c3 execute
/home/siddhesh/src/gcc/gcc/predict.c:3760
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-582886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 15:36:09 2017
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Subject: [Bug tree-optimization/83129] calloc zero initialization is not taken into account by gcc
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83129
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-23
Version|unknown |8.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed - mine.
This one is interesting because alias-wise we consider allocation functions
not clobbering anything -- dependences for the pointer will prevent any
invalid transform.
That of course means we'll never visit it via vn_reference_lookup_3.
One trick we don't pull is that if there's a must-alloc in the path we can
stop walking. Another trick we don't pull is that if we don't find any
may-def the memory we load is uninitialized (or in this case zero-initialized
as we don't find the calloc as may-def either - an issue for calloc and
-Wuninit maybe). So we could in theory optimistically value-number each
of those to zero (conservatively to treat calloc "right").
Need to think about that -Wuninitialized case. Ah, we only ever warn
using the oracle walking for decls, so never for allocated memory.
So in theory the following but it doesn't trigger because of the above.
Index: gcc/tree-ssa-sccvn.c
===================================================================
--- gcc/tree-ssa-sccvn.c (revision 255093)
+++ gcc/tree-ssa-sccvn.c (working copy)
@@ -2412,6 +2417,21 @@ vn_reference_lookup_3 (ao_ref *ref, tree
return NULL;
}
+ /* 7) calloc, optimize ref to all zeros. */
+ else if (is_gimple_reg_type (vr->type)
+ && gimple_call_builtin_p (def_stmt, BUILT_IN_CALLOC)
+ && TREE_CODE (base) == MEM_REF
+ && TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME
+ && SSA_VAL (TREE_OPERAND (base, 0)) != VN_TOP
+ && SSA_VAL (TREE_OPERAND (base, 0)) == gimple_call_lhs (def_stmt))
+ {
+ /* We do not bother to check whether the ref is in range because
+ we'll usually not be able to anyway. */
+ tree val = build_zero_cst (vr->type);
+ return vn_reference_lookup_or_insert_for_pieces
+ (vuse, vr->set, vr->type, vr->operands, val);
+ }
+
/* Bail out and stop walking. */
return (void *)-1;
}
>From gcc-bugs-return-582887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 16:13:27 2017
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From: "randy.macleod at windriver dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81317] builtin_vec_ld fails for powerpc with altivec
Date: Thu, 23 Nov 2017 16:13:00 -0000
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--- Comment #28 from Randy MacLeod <randy.macleod at windriver dot com> ---
Alex, thanks for confirming, I was worried that it was one of the _perfectly_
sensible local patches we have in YP. ;-)
FYI, a local toolchain expert has started working on this defect so stay tuned
/ keeep refreshing.
>From gcc-bugs-return-582888-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 16:28:10 2017
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From: "jenda.tusil at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83132] New: Error while redeclaring an enum with extra qualification
Date: Thu, 23 Nov 2017 16:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83132
Bug ID: 83132
Summary: Error while redeclaring an enum with extra
qualification
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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g++ -std=c++14 does not compile this:
enum E : int;
enum ::E : int{};
It says:
2:10: error: expected unqualified-id before ‘:’ token
Clang compiles it without errors, but gives a little wierd warning:
warning: extra qualification on member 'E' [-Wextra-qualification]
The bug was found in the context of this SO thread:
https://stackoverflow.com/q/47383199/6209703
It manifestes in most (all?) gcc versions on https://gcc.godbolt.org/
>From gcc-bugs-return-582889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 16:36:50 2017
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Subject: [Bug c++/83132] Error while redeclaring an enum with extra qualification
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-23
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Similar error for classes:
namespace N { struct E; }
struct ::N::E {};
x.C:2:15: error: global qualification of class name is invalid before ‘{’ token
struct ::N::E {};
^
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Subject: [Bug rtl-optimization/83133] New: Superflous x86 test instructions in generated assembly.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83133
Bug ID: 83133
Summary: Superflous x86 test instructions in generated
assembly.
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
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Consider the following code:
int negative(int);
int positive(int);
int nonnegative(int);
int nonpositive(int);
int f(int a, int b) {
int diff = a - b;
if(diff < 0)
return negative(diff);
else
return nonnegative(diff);
}
int g(int a, int b) {
int diff = a - b;
if(diff > 0)
return positive(diff);
else
return nonpositive(diff);
}
And the assembly generated with `-O3 -march=broadwell`:
f(int, int):
subl %esi, %edi
js .L4
jmp nonnegative(int)
.L4:
jmp negative(int)
g(int, int):
subl %esi, %edi
testl %edi, %edi <---- unnecessary instruction.
jle .L6
jmp positive(int)
.L6:
jmp nonpositive(int)
g function assembly contains a superflous test instruction. It should not
generate that instruction, since sub instruction already sets all the required
flags. I first discovered this issue in gcc-4.9.2 and it is still there in
gcc-7.2.0.
Double-checked it with clang-5.0.0 and it seem to generate optimal assembly:
f(int, int): # @f(int, int)
subl %esi, %edi
js .LBB0_1
jmp nonnegative(int) # TAILCALL
.LBB0_1:
jmp negative(int) # TAILCALL
g(int, int): # @g(int, int)
subl %esi, %edi
jle .LBB1_2
jmp positive(int) # TAILCALL
.LBB1_2:
jmp nonpositive(int) # TAILCALL
>From gcc-bugs-return-582891-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 17:13:38 2017
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Subject: [Bug bootstrap/81869] [8 Regression] --enable-checking=yes,rtl failed to bootstrap on 32-bit hosts
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Does this still happen? I'm bootstrapping/regtesting with
--enable-languages=default,obj-c++,lto,go,brig --enable-checking=yes,rtl,extra
on i686-linux often several times a day and haven't seen this.
>From gcc-bugs-return-582892-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 17:19:56 2017
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/78549] [8 Regression] Very slow formatted internal file output
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--- Comment #26 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Thu Nov 23 17:19:18 2017
New Revision: 255108
URL: https://gcc.gnu.org/viewcvs?rev=255108&root=gcc&view=rev
Log:
2017-11-23 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Backport from trunk
PR libgfortran/78549
* io/io.h (newunit_free): Add declaration. Clean some whitespace.
* io/transfer.c (st_read_done, st_write_done): Call newunit_free.
* io/unit.c (newunit_free): Change type from static void to void.
Modified:
branches/gcc-7-branch/libgfortran/ChangeLog
branches/gcc-7-branch/libgfortran/io/io.h
branches/gcc-7-branch/libgfortran/io/transfer.c
branches/gcc-7-branch/libgfortran/io/unit.c
>From gcc-bugs-return-582893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 17:30:42 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> As I said in the other bug we're seeing
>
> real(real64), dimension(nsplit) :: tmp
>
> as "shared" amongst the outer loop iterations.
>
> ...
>
> Not sure if you need to mark compute somehow to avoid this
> and the testcase is invalid fortran or if the frontend is at fault.
IMO the testcase is valid fortran and, with my naive view of arrays returned by
a function, the returned array should be private to the function.
If I do the following changes
...
real(real64), dimension(nsplit) :: pi, pik
...
do concurrent (i = 1:nsplit)
pik = compute( low(i), high(i) )
pi(i) = sum(pik)
end do
...
the code works as expected, at least for my limited testing.
Do you understand why the code is not parallelized with
-ftree-parallelize-loops=4?
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Subject: [Bug target/83114] [5/6/7/8 Regression] ICE in gen_vec_cmpv2dfv2di, at config/aarch64/aarch64-simd.md:2495
Date: Thu, 23 Nov 2017 17:33:00 -0000
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James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|7.3 |6.6
Summary|[7/8 Regression] ICE in |[5/6/7/8 Regression] ICE in
|gen_vec_cmpv2dfv2di, at |gen_vec_cmpv2dfv2di, at
|config/aarch64/aarch64-simd |config/aarch64/aarch64-simd
|.md:2495 |.md:2495
>From gcc-bugs-return-582894-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 17:33:29 2017
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Subject: [Bug target/83114] [7/8 Regression] ICE in gen_vec_cmpv2dfv2di, at config/aarch64/aarch64-simd.md:2495
Date: Thu, 23 Nov 2017 17:33:00 -0000
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James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amker.cheng at gmail dot com,
| |jgreenhalgh at gcc dot gnu.org,
| |sudi.das at arm dot com
Known to work|6.4.1 |4.8.1
Known to fail| |4.9.1, 5.1.1
--- Comment #3 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
Looks like we're missing handling for LTGT in our vcmp/vcond handlers.
/* This is an ordered NE, ie !UNEQ, ie false for NaN. */
DEF_RTL_EXPR(LTGT, "ltgt", "ee", RTX_COMM_COMPARE)
I bet this would fail even further back with a modified testcase (this one is
somewhat undefined behaviour).
void *a;
void b(double *in) {
char c;
long d = -1024;
char *e = a;
for (; d; d++) {
double f = in[d], g = in[d+1];
c = g < f || g > f;
e[d] = c;
}
}
Is broken back to at least GCC 4.9.
Well... I implemented the original version of this code in GCC 4.9 and today is
the first time I heard of LTGT, so not surprising I missed it!
>From gcc-bugs-return-582896-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 17:34:13 2017
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Subject: [Bug rtl-optimization/83123] Int compare - different asm code for different return type
Date: Thu, 23 Nov 2017 17:34:00 -0000
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
In the first case (with the extend to SImode) the extend is combined
with the AND, to an AND in SImode. After that, the 3-insn combination
of the two shifts with the AND is something combine knows how to split.
In the second case this of course does not happen.
>From gcc-bugs-return-582897-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 17:35:07 2017
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Subject: [Bug target/82459] AVX512F instruction costs: vmovdqu8 stores may be an extra uop, and vpmovwb is 2 uops on Skylake and not always worth using
Date: Thu, 23 Nov 2017 17:35:00 -0000
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Andrew Senkevich <andrew.n.senkevich at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andrew.n.senkevich at gmail dot co
| |m
--- Comment #2 from Andrew Senkevich <andrew.n.senkevich at gmail dot com> ---
Currently -mprefer-avx256 is default for SKX and vzeroupper addition was fixed,
code generated is:
.L3:
vpsrlw $8, (%rsi,%rax,2), %ymm0
vpsrlw $8, 32(%rsi,%rax,2), %ymm1
vpand %ymm0, %ymm2, %ymm0
vpand %ymm1, %ymm2, %ymm1
vpackuswb %ymm1, %ymm0, %ymm0
vpermq $216, %ymm0, %ymm0
vmovdqu8 %ymm0, (%rdi,%rax)
addq $32, %rax
cmpq %rax, %rdx
jne .L3
vmovdqu8 remains but I cannot confirm it is slower.
>From gcc-bugs-return-582899-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 17:42:32 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
Date: Thu, 23 Nov 2017 17:42:00 -0000
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On November 23, 2017 6:30:34 PM GMT+01:00, "dominiq at lps dot ens.fr"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83064
>
>--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr>
>---
>> As I said in the other bug we're seeing
>>
>> real(real64), dimension(nsplit) :: tmp
>>
>> as "shared" amongst the outer loop iterations.
>>
>> ...
>>
>> Not sure if you need to mark compute somehow to avoid this
>> and the testcase is invalid fortran or if the frontend is at fault.
>
>IMO the testcase is valid fortran and, with my naive view of arrays
>returned by
>a function, the returned array should be private to the function.
>
>If I do the following changes
>
>...
> real(real64), dimension(nsplit) :: pi, pik
>...
> do concurrent (i = 1:nsplit)
> pik = compute( low(i), high(i) )
> pi(i) = sum(pik)
> end do
>...
>
>the code works as expected, at least for my limited testing.
I looked at the IL from the Fortran FE and it clearly uses a single memory area
for tmp for each outer loop iteration. That is, the memory is allocated by the
caller.
>
>Do you understand why the code is not parallelized with
>-ftree-parallelize-loops=4?
Because the outer loop has four iterations and we statically require at least
two per thread for outer loops.
Richard.
>From gcc-bugs-return-582898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 17:42:04 2017
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Subject: [Bug target/83110] Relocation error when taking address of protected function in shared library.
Date: Thu, 23 Nov 2017 17:42:00 -0000
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--- Comment #2 from Yichao Yu <yyc1992 at gmail dot com> ---
What might be invalid about the source?
>From gcc-bugs-return-582900-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 17:48:27 2017
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/78549] [8 Regression] Very slow formatted internal file output
Date: Thu, 23 Nov 2017 17:48:00 -0000
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--- Comment #27 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
This should be fixed now fairly well. At this point there are not a lot of
major issues in our own libgfortran library. I will leave this bug report open
for a while if any issues arise.
Here is my latest profile. On my machine I am actuall getting slightly better
performance on trunk (8) vs. gfortran 6
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self
time seconds seconds name
15.11 4.30 4.30 printf_positional
14.65 8.47 4.17 __printf_fp_l
7.13 10.50 2.03 __parse_one_specmb
6.08 12.23 1.73 build_float_string
4.16 13.42 1.19 formatted_transfer_scalar_write
2.39 14.10 0.68 next_format0
2.28 14.75 0.65 _IO_no_init
2.23 15.38 0.64 __mpn_mul_1
2.21 16.01 0.63 ____strtol_l_internal
2.18 16.63 0.62 vfprintf
1.86 17.16 0.53 __strchrnul_sse2
1.79 17.67 0.51 _gfortrani_next_format
1.77 18.18 0.51 _IO_str_init_static_internal
1.76 18.68 0.50 __mpn_extract_double
1.72 19.17 0.49 vsnprintf
1.72 19.66 0.49 _IO_default_xsputn
1.69 20.14 0.48 _int_malloc
1.62 20.60 0.46 __memmove_sse2_unaligned_erms
1.28 20.96 0.37 get_float_string
1.12 21.28 0.32 _IO_padn
1.02 21.57 0.29 __memset_sse2_unaligned
1.02 21.86 0.29 __wmemset_sse2_unaligned
0.91 22.12 0.26 flt128_ais
>From gcc-bugs-return-582901-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 17:52:41 2017
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Subject: [Bug fortran/36313] [F03] {MIN,MAX}{LOC,VAL} should accept character arguments
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--- Comment #12 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Nov 23 17:52:05 2017
New Revision: 255109
URL: https://gcc.gnu.org/viewcvs?rev=255109&root=gcc&view=rev
Log:
2017-11-23 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/36313
* m4/maxloc2s.m4: Replace int for character length by
gfc_charlen_type.
* m4/minloc2s.m4: Likewise.
* generated./maxloc2_16_s1.c: Regenerated.
* generated./maxloc2_16_s4.c: Regenerated.
* generated./maxloc2_4_s1.c: Regenerated.
* generated./maxloc2_4_s4.c: Regenerated.
* generated./maxloc2_8_s1.c: Regenerated.
* generated./maxloc2_8_s4.c: Regenerated.
* generated./minloc2_16_s1.c: Regenerated.
* generated./minloc2_16_s4.c: Regenerated.
* generated./minloc2_4_s1.c: Regenerated.
* generated./minloc2_4_s4.c: Regenerated.
* generated./minloc2_8_s1.c: Regenerated.
* generated./minloc2_8_s4.c: Regenerated.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/generated/maxloc2_16_s1.c
trunk/libgfortran/generated/maxloc2_16_s4.c
trunk/libgfortran/generated/maxloc2_4_s1.c
trunk/libgfortran/generated/maxloc2_4_s4.c
trunk/libgfortran/generated/maxloc2_8_s1.c
trunk/libgfortran/generated/maxloc2_8_s4.c
trunk/libgfortran/generated/minloc2_16_s1.c
trunk/libgfortran/generated/minloc2_16_s4.c
trunk/libgfortran/generated/minloc2_4_s1.c
trunk/libgfortran/generated/minloc2_4_s4.c
trunk/libgfortran/generated/minloc2_8_s1.c
trunk/libgfortran/generated/minloc2_8_s4.c
trunk/libgfortran/m4/maxloc2s.m4
trunk/libgfortran/m4/minloc2s.m4
>From gcc-bugs-return-582902-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 17:57:18 2017
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Subject: [Bug testsuite/81807] [8 Regression] many *.cc asan tests fail
Date: Thu, 23 Nov 2017 17:57:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Is that still the case or was it some short episode in August? I certainly
don't see such FAILs in my x86_64 or i686-linux regtests, nor can see them on
current powerpc64{,le}-linux gcc-testresults.
>From gcc-bugs-return-582903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 17:58:34 2017
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Subject: [Bug c++/81722] [7/8 Regression] memory hog building c++ on i686-linux-gnu
Date: Thu, 23 Nov 2017 17:58:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Let's just close this.
>From gcc-bugs-return-582905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 18:19:15 2017
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Subject: [Bug target/19520] protected function pointer and copy relocation don't work right
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H.J. Lu <hjl.tools at gmail dot com> changed:
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--- Comment #33 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 83110 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-582904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 18:19:14 2017
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Subject: [Bug target/83110] Relocation error when taking address of protected function in shared library.
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--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Dup.
*** This bug has been marked as a duplicate of bug 19520 ***
>From gcc-bugs-return-582906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 18:33:36 2017
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Subject: [Bug c/82050] [8 Regression] ICE on invalid code on x86_64-linux-gnu in column_range, at diagnostic-show-locus.c:1403
Date: Thu, 23 Nov 2017 18:33:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42697
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42697&action=edit
pr82050.c
Here it is.
>From gcc-bugs-return-582907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 18:49:24 2017
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From: "siddhesh at gotplt dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
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--- Comment #5 from Siddhesh Poyarekar <siddhesh at gotplt dot org> ---
This fixes the problem for me. freq_max < 1, i.e. freq_max of one of the bbs
in the function means that it ends up having a profile count larger than 2^30
since the freq_max gets reset to 16. Dropping this reset makes sure that the
profile counts are always correctly normalized to real_bb_freq_max:
diff --git a/gcc/predict.c b/gcc/predict.c
index 0f34956..ff9b5a9 100644
--- a/gcc/predict.c
+++ b/gcc/predict.c
@@ -3613,8 +3613,6 @@ estimate_bb_frequencies (bool force)
freq_max = BLOCK_INFO (bb)->frequency;
freq_max = real_bb_freq_max / freq_max;
- if (freq_max < 16)
- freq_max = 16;
profile_count ipa_count = ENTRY_BLOCK_PTR_FOR_FN (cfun)->count.ipa ();
cfun->cfg->count_max = profile_count::uninitialized ();
FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR_FOR_FN (cfun), NULL, next_bb)
>From gcc-bugs-return-582908-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 18:52:35 2017
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
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--- Comment #6 from Siddhesh Poyarekar <siddhesh at gotplt dot org> ---
(In reply to Siddhesh Poyarekar from comment #5)
> This fixes the problem for me. freq_max < 1, i.e. freq_max of one of the
> bbs in the function means that it ends up having a profile count larger than
Sorry, that bit should read as "freq_max < 1, i.e. highest frequency among bbs
in the function being higher than real_bb_freq_max means that the bb ends up
with a profile count larger than real_bb_freq_max and then can go all the way
up to and beyond profile_count::max_count".
>From gcc-bugs-return-582909-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 19:09:27 2017
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Subject: [Bug target/81291] [6/7 Regression] wrong code with -O2 -fno-rerun-cse-after-loop -fno-tree-ter -fno-tree-vrp -funroll-loops due to improper carry
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Known to work| |8.0
Summary|[6/7/8 Regression] wrong |[6/7 Regression] wrong code
|code with -O2 |with -O2
|-fno-rerun-cse-after-loop |-fno-rerun-cse-after-loop
|-fno-tree-ter -fno-tree-vrp |-fno-tree-ter -fno-tree-vrp
|-funroll-loops due to |-funroll-loops due to
|improper carry |improper carry
Known to fail|8.0 |
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Indeed, fixed by r254874 on the trunk.
>From gcc-bugs-return-582910-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 19:10:25 2017
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From: "jenda.tusil at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83132] Error while redeclaring an enum with extra qualification
Date: Thu, 23 Nov 2017 19:10:00 -0000
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--- Comment #2 from Jan Tušil <jenda.tusil at gmail dot com> ---
The 'struct' version can be simplified to:
struct E;
struct ::E {};
Which gives the following error:
2:12: error: global qualification of class name is invalid before '{' token
>From gcc-bugs-return-582912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 19:37:49 2017
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Subject: [Bug target/83114] [5/6/7/8 Regression] ICE in gen_vec_cmpv2dfv2di, at config/aarch64/aarch64-simd.md:2495
Date: Thu, 23 Nov 2017 19:37:00 -0000
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amker at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amker at gcc dot gnu.org
--- Comment #4 from amker at gcc dot gnu.org ---
I think this duplilcates PR81228. See
https://gcc.gnu.org/ml/gcc-patches/2017-07/msg01915.html, also see PR81647.
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Subject: [Bug libfortran/78549] Very slow formatted internal file output
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8 Regression] Very slow |Very slow formatted
|formatted internal file |internal file output
|output |
--- Comment #28 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
No longer a regression.
>From gcc-bugs-return-582913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 19:41:05 2017
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Subject: [Bug ada/83091] ICE with -g in arm-eabi compilation
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--- Comment #4 from simon at pushface dot org ---
The tentative patch solves all the -g errors.
My report in comment 1 is solved by patches for pr 82816 and pr 82875.
>From gcc-bugs-return-582914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 19:44:55 2017
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Subject: [Bug libstdc++/83134] New: std::negation uses !B::value instead of !bool(B::value)
Date: Thu, 23 Nov 2017 19:44:00 -0000
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Bug ID: 83134
Summary: std::negation uses !B::value instead of
!bool(B::value)
Product: gcc
Version: 7.2.1
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#include <type_traits>
struct X {
constexpr operator bool() const { return false; }
constexpr bool operator!() const = delete;
};
struct Y {
static constexpr X value{};
};
int main() {
static_assert(std::negation<Y>::value);
}
In file included from neg.cc:1:0:
/home/jwakely/gcc/8/include/c++/8.0.0/type_traits: In instantiation of ‘struct
std::__not_<Y>’:
/home/jwakely/gcc/8/include/c++/8.0.0/type_traits:172:12: required from
‘struct std::negation<Y>’
neg.cc:13:33: required from here
/home/jwakely/gcc/8/include/c++/8.0.0/type_traits:154:38: error: use of deleted
function ‘constexpr bool X::operator!() const’
: public integral_constant<bool, !_Pp::value>
^~~~
neg.cc:5:18: note: declared here
constexpr bool operator!() const = delete;
^~~~~~~~
neg.cc: In function ‘int main()’:
neg.cc:13:35: error: ‘value’ is not a member of ‘std::negation<Y>’
static_assert(std::negation<Y>::value);
^~~~~
>From gcc-bugs-return-582915-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 19:45:43 2017
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Subject: [Bug libstdc++/83134] std::negation uses !B::value instead of !bool(B::value)
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-23
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Ever confirmed|0 |1
>From gcc-bugs-return-582916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 20:01:51 2017
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
Date: Thu, 23 Nov 2017 20:01:00 -0000
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--- Comment #16 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
ytrium also bootstraps for me. I see you use release checking for stage1 that
may be the trigger, I will try it now.
>From gcc-bugs-return-582917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 20:14:40 2017
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Subject: [Bug ada/83091] ICE with -g in arm-eabi compilation
Date: Thu, 23 Nov 2017 20:14:00 -0000
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> The tentative patch solves all the -g errors.
Great, thanks for the feedback.
>From gcc-bugs-return-582918-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 20:16:56 2017
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81291] [6/7 Regression] wrong code with -O2 -fno-rerun-cse-after-loop -fno-tree-ter -fno-tree-vrp -funroll-loops due to improper carry
Date: Thu, 23 Nov 2017 20:16:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Closing as dup then.
*** This bug has been marked as a duplicate of bug 82621 ***
>From gcc-bugs-return-582919-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 20:16:56 2017
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/82621] [6/7 Regression] wrong code with -Og -fgcse -fweb
Date: Thu, 23 Nov 2017 20:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82621
--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
*** Bug 81291 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-582920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 20:17:16 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/81841] [6/7/8 Regression] THREADPRIVATE (OpenMP) wrongly rejected in BLOCK DATA
Date: Thu, 23 Nov 2017 20:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81841
--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Nov 23 20:16:38 2017
New Revision: 255115
URL: https://gcc.gnu.org/viewcvs?rev=255115&root=gcc&view=rev
Log:
PR fortran/81841
* parse.c (parse_spec): Allow ST_OMP_THREADPRIVATE inside of
BLOCK DATA.
* libgomp.fortran/pr81841.f90: New test.
Added:
trunk/libgomp/testsuite/libgomp.fortran/pr81841.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/parse.c
trunk/libgomp/ChangeLog
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From: "ying.zhu at doctorant dot ec-lyon.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83135] New: Routines in submodules treat protected variables from other modules as public
Date: Thu, 23 Nov 2017 20:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83135
Bug ID: 83135
Summary: Routines in submodules treat protected variables from
other modules as public
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: ying.zhu at doctorant dot ec-lyon.fr
Target Milestone: ---
Created attachment 42698
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42698&action=edit
Code to illustrate the bug
I define a variable xx in mod1 with protected attribute, then use mod1 in mod2.
echo_xx is a submodule subroutine implemented in a submodule of mod2, then I
find echo_xx can change the value of xx and gnu fortran allows this when
compiling and running, protected attribute doesn't work at all.
Meanwhile, the value of xx can not be changed in main program or other module
subroutines not submodule subroutines. Thant means, this bug is only related to
submodules.
>From gcc-bugs-return-582922-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 21:03:25 2017
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Subject: [Bug fortran/79072] ICE with class(*) pointer function result and character value
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79072
--- Comment #20 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Thu Nov 23 21:02:48 2017
New Revision: 255120
URL: https://gcc.gnu.org/viewcvs?rev=255120&root=gcc&view=rev
Log:
2017-11-23 Paul Thomas <pault@gcc.gnu.org>
Backported from trunk
PR fortran/79072
* trans-expr.c (trans_class_vptr_len_assignment): Set from_len
if the temporary is unlimited polymorphic.
* trans-stmt.c (trans_associate_var): Use the fake result decl
to obtain the 'len' field from an explicit function result when
in that function scope.
2017-11-23 Paul Thomas <pault@gcc.gnu.org>
Backported from trunk
PR fortran/79072
* gfortran.dg/class_result_5.f90: New test.
* gfortran.dg/class_result_6.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/class_result_5.f90
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/class_result_6.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/trans-expr.c
branches/gcc-7-branch/gcc/fortran/trans-stmt.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: =?UTF-8?B?W0J1ZyBjKysvODMxMzZdIE5ldzogc3RhdGljIGNsYXNzIHRlbXBsYXRlIG1l?= =?UTF-8?B?bWJlcjogaW52YWxpZCBhcHBsaWNhdGlvbiBvZiDigJhzaXplb2bigJkgdG8g?= =?UTF-8?B?aW5jb21wbGV0ZSB0eXBl?Date: Thu, 23 Nov 2017 21:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83136
Bug ID: 83136
Summary: static class template member: invalid application of
‘sizeof’ to incomplete type
Product: gcc
Version: 8.0
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Created attachment 42699
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42699&action=edit
example source code illustrating bug
Compiling the below example results in the following error
-----------
In instantiation of ‘struct Storage<Bar<int>, 10ul>’:
required from ‘struct Bar<int>’
error: invalid application of ‘sizeof’ to incomplete type ‘Bar<int>’
std::aligned_storage_t<sizeof(T), alignof(T)> data[N];
-----------
#include <type_traits>
#include <cstddef>
template<typename T, std::size_t N>
struct Storage
{
std::aligned_storage_t<sizeof(T), alignof(T)> data[N];
};
template<typename T>
struct PoolObj
{
static void* operator new(std::size_t size)
{
return &T::pool.data[0];
}
static void operator delete(void* p, std::size_t size)
{
}
};
template<typename T>
struct Bar : PoolObj<Bar<T>>
{
static Storage<Bar<T>, 10> pool;
};
template<typename T>
Storage<Bar<T>, 10> Bar<T>::pool {};
int main()
{
Bar<int>* b = new Bar<int>();
delete b;
return 0;
}
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/83134] std::negation uses !B::value instead of !bool(B::value)
Date: Thu, 23 Nov 2017 21:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83134
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Nov 23 21:35:27 2017
New Revision: 255122
URL: https://gcc.gnu.org/viewcvs?rev=255122&root=gcc&view=rev
Log:
PR libstdc++/83134 Ensure std::__not_ converts B::value to bool
PR libstdc++/83134
* include/std/type_traits (__not_): Explicitly convert to bool.
* testsuite/20_util/declval/requirements/1_neg.cc: Adjust dg-error.
* testsuite/20_util/logical_traits/83134.cc: New test.
* testsuite/20_util/make_signed/requirements/typedefs_neg.cc: Adjust
dg-error.
* testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc:
Likewise.
Added:
trunk/libstdc++-v3/testsuite/20_util/logical_traits/83134.cc
- copied, changed from r255096,
trunk/libstdc++-v3/testsuite/20_util/declval/requirements/1_neg.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/std/type_traits
trunk/libstdc++-v3/testsuite/20_util/declval/requirements/1_neg.cc
trunk/libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs_neg.cc
trunk/libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc
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Subject: [Bug ada/83091] ICE with -g in arm-eabi compilation
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83091
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Nov 23 22:55:05 2017
New Revision: 255125
URL: https://gcc.gnu.org/viewcvs?rev=255125&root=gcc&view=rev
Log:
PR ada/83091
* gcc-interface/decl.c (gnat_to_gnu_entity): Do not build a variant
type for the implementation type of a packed array.
Modified:
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/gcc-interface/decl.c
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Subject: [Bug ada/83091] ICE with -g in arm-eabi compilation
Date: Thu, 23 Nov 2017 22:58:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
>From gcc-bugs-return-582927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 23 23:11:06 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
Date: Thu, 23 Nov 2017 23:11:00 -0000
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I looked at the IL from the Fortran FE and it clearly uses a single memory
> area for tmp for each outer loop iteration. That is, the memory is allocated
> by the caller.
I confirm that using
pik = compute( low(i), high(i) )
pi(i) = sum(pik)
gives the right result.
Does it means that the 'sum' in 'sum(compute( low(i), high(i) ))' is not part
of the parallelization?
> > Do you understand why the code is not parallelized with
> > -ftree-parallelize-loops=4?
> Because the outer loop has four iterations and we statically require
> at least two per thread for outer loops.
Why is it so? and is it documented?
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From: "manfred99 at gmx dot ch" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libfortran/78549] Very slow formatted internal file output
Date: Fri, 24 Nov 2017 00:01:00 -0000
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--- Comment #29 from Manfred Schwarb <manfred99 at gmx dot ch> ---
Here are the results from my test case from PR82938
(without the "print*,f" statement, which consumes ~1s):
1.1s for GNU Fortran (GCC) 8.0.0 20170828 (experimental) [trunk revision
251373]
3.3s for GNU Fortran (GCC) 8.0.0 20170829 (experimental) [trunk revision
251395]
1.3s for GNU Fortran (GCC) 8.0.0 20171123 (experimental) [trunk revision
255090]
0.4s for version with Fortran wrapper of C function strtof()
So, with Jerry's patch gfortran is now only a little slower than before
the DTIO patches, so still some minor regression for internal read.
But there is still some large gap compared to the C routine version...
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From: "erik2003 at u dot washington.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83137] New: Member function pointer template parameter not constant expression when set to nullptr
Date: Fri, 24 Nov 2017 01:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83137
Bug ID: 83137
Summary: Member function pointer template parameter not
constant expression when set to nullptr
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Created attachment 42700
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42700&action=edit
minimal bug example with additional context
When using if constexpr(), GCC claims a member function pointer template
parameter isn't a constant expression if set to nullptr. This does not happen
if the member function pointer points to a real function, or if a raw function
pointer is used instead. Replacing nullptr with (void (Fake::*)())0 or (void
(Fake::*)())NULL produces the same error.
This code compiles in clang but generates an error in GCC:
struct Fake { };
template<class T, void (T::*SET)()>
void MemberTest()
{
if constexpr(SET == nullptr)
return;
}
int main()
{
MemberTest<Fake, nullptr>();
}
gccbug.cpp: In instantiation of ‘void MemberTest() [with T = Fake; void (T::*
SET)() = void (Fake::*)(){0, 0}]’:
gccbug.cpp:20:29: required from here
gccbug.cpp:6:20: error: ‘(void (Fake::*)(){0, 0}.void (Fake::*)()::__pfn == 0)’
is not a constant expression
if constexpr(SET == nullptr)
~~~~^~~~~~~~~~
This was tested on GCC 7.1.1 and 7.2.0, and is similar to Bug 56428, but
applies to member function pointers only and is triggered by setting the member
function pointer to nullptr instead of comparing it to nullptr.
>From gcc-bugs-return-582930-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 01:29:55 2017
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Subject: [Bug c/82050] [8 Regression] ICE on invalid code on x86_64-linux-gnu in column_range, at diagnostic-show-locus.c:1403
Date: Fri, 24 Nov 2017 01:29:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |dmalcolm at gcc dot gnu.org
--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Thanks!
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From: "hstong at ca dot ibm.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83138] New: ICE: Segfault expanding function parameter pack in subsequent sibling pack declaration
Date: Fri, 24 Nov 2017 03:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83138
Bug ID: 83138
Summary: ICE: Segfault expanding function parameter pack in
subsequent sibling pack declaration
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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Given the self-contained source below, GCC ICEs with a segmentation fault.
This used to work with GCC 4.7.4.
### SOURCE (<stdin>):
template <typename ...T> void f(T ...args, char ...args2[][sizeof args]) { }
template <typename T> void g(T) { }
void h() { g(&f<int>); }
### ACTUAL OUTPUT:
g++: internal compiler error: Segmentation fault signal terminated program
cc1plus
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
### EXPECTED OUTPUT:
Clean compile.
### COMPILER INVOCATION COMMAND:
g++ -fsyntax-only -x c++ -std=c++11 -
### COMPILER VERSION INFO (g++ -v):
Using built-in specs.
COLLECT_GCC=/opt/wandbox/gcc-head/bin/g++
COLLECT_LTO_WRAPPER=/opt/wandbox/gcc-head/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../source/configure --prefix=/opt/wandbox/gcc-head
--enable-languages=c,c++ --disable-multilib --without-ppl --without-cloog-ppl
--enable-checking=release --disable-nls --enable-lto
LDFLAGS=-Wl,-rpath,/opt/wandbox/gcc-head/lib,-rpath,/opt/wandbox/gcc-head/lib64,-rpath,/opt/wandbox/gcc-head/lib32
Thread model: posix
gcc version 8.0.0 20171122 (experimental) (GCC)
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/81807] [8 Regression] many *.cc asan tests fail
Date: Fri, 24 Nov 2017 04:06:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #4 from Jeffrey A. Law <law at redhat dot com> ---
My recollection is the test harness doesn't pick up the .cc files so those
tests weren't being run. We had a patch to pick up the .cc files in the test
harness which got installed and the tests mentioned in c#0 all failed across
the board for every target. As a result the test harness patch got reverted.
So we've still got these .cc files in the testsuite which don't work in any way
shape or form. Ideally we'd figure out why so that we could use those tests.
We could certainly drop the regression marker here and just track this as a
request to make those tests work across the targets that support asan.
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
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--- Comment #17 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Indeed with the configure flags used by your tester it does reproduce. It is
difference in inlining priority order, perhaps caused by the badness sanity
check (though I fail to see how)
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Subject: [Bug testsuite/81807] [8 Regression] many *.cc asan tests fail
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |chefmax at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Actually, looking in detail, this has been fixed by r251265 by reverting the
change. The *.cc files are intentionally not executed, those are the original
upstream tests which are sourced by the asan_test.C wrapper provided by us.
It is true that dlclose-test-1-so.cc and shared-lib-test-1-so.cc are not
included from anything and not run at all. But those tests are something that
really need very special treatment in asan.exp, and apparently that ended up
not being included. Some of it has been in e.g. in:
https://gcc.gnu.org/ml/gcc-patches/2012-12/msg00106.html
Anyway, closing as the regressions don't appear anymore.
We might want to backport some asan_test.cc etc. changes, haven't done that
recently during the merge.
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
Date: Fri, 24 Nov 2017 08:25:00 -0000
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--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 23 Nov 2017, dominiq at lps dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83064
>
> --- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > I looked at the IL from the Fortran FE and it clearly uses a single memory
> > area for tmp for each outer loop iteration. That is, the memory is allocated
> > by the caller.
>
> I confirm that using
>
> pik = compute( low(i), high(i) )
> pi(i) = sum(pik)
>
> gives the right result.
>
> Does it means that the 'sum' in 'sum(compute( low(i), high(i) ))' is not part
> of the parallelization?
no idea, I can't do the above, pik is not declared.
>
> > > Do you understand why the code is not parallelized with
> > > -ftree-parallelize-loops=4?
>
> > Because the outer loop has four iterations and we statically require
> > at least two per thread for outer loops.
>
> Why is it so? and is it documented?
It is documented:
@item parloops-min-per-thread
The minimum number of iterations per thread of an innermost parallelized
loop for which the parallelized variant is prefered over the single
threaded
one. The default is 100. Note that for a parallelized loop nest the
minimum number of iterations of the outermost loop per thread is two.
note autopar isn't very well maintained and certainly the cost modeling
needs some work.
So for the issue in this bug the .original from the fortran FE looks
ok:
while (1)
{
if (ANNOTATE_EXPR <count.9 <= 0, parallel>) goto L.10;
{
real(kind=4) val.5;
integer(kind=8) * D.3618;
integer(kind=8) * D.3619;
struct array1_real(kind=4) atmp.6;
real(kind=4) A.7[4];
val.5 = 0.0;
D.3618 = &low[NON_LVALUE_EXPR <i.4> + -1];
D.3619 = &high[NON_LVALUE_EXPR <i.4> + -1];
typedef real(kind=4) [4];
atmp.6.dtype = 281;
atmp.6.dim[0].stride = 1;
atmp.6.dim[0].lbound = 0;
atmp.6.dim[0].ubound = 3;
atmp.6.data = (void * restrict) &A.7;
atmp.6.offset = 0;
compute (&atmp.6, D.3618, D.3619);
so A.7 is in scope of the concurrent loop body and gimplification
adds a CLOBBER at the end of the scope.
I believe there's no logic in autopar that would use this to
force local allocation of that variable. It might be also
fragile since we can't really rely on those CLOBBERs persisting(?)
This means a DO CONCURRENT isn't enough to skip the validity
check in autopar, in fact DO CONCURRENT doesn't tell us anything
but maybe skipping any cost modeling during autopar?
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
Date: Fri, 24 Nov 2017 08:30:00 -0000
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--- Comment #18 from Jan Hubicka <hubicka at ucw dot cz> ---
With the release checking in stage1 it reproduces on x86-64, too.
I am testing
Index: ipa-inline.c
===================================================================
--- ipa-inline.c (revision 255103)
+++ ipa-inline.c (working copy)
@@ -1865,6 +1865,8 @@ inline_small_functions (void)
gcc_assert (cached_badness == current_badness);
gcc_assert (current_badness >= badness);
}
+ else
+ current_badness = edge_badness (edge, false);
#else
current_badness = edge_badness (edge, false);
#endif
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Subject: [Bug c++/83138] ICE: Segfault expanding function parameter pack in subsequent sibling pack declaration
Date: Fri, 24 Nov 2017 08:32:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-24
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I can't reproduce "This used to work", before r183768 it used to be rejected:
pr83138.C:3:21: error: expansion pattern ‘char [][4]’ contains no argument
packs
pr83138.C:3:21: error: no matching function for call to ‘g(<unresolved
overloaded function type>)’
pr83138.C:3:21: note: candidate is:
pr83138.C:2:28: note: template<class T> void g(T)
pr83138.C:2:28: note: substitution of deduced template arguments resulted in
errors seen above
and since then it ICEs due to running out of stack (apparently endless
recursion in:
#9 0x00000000009f4458 in tsubst_pack_expansion (t=<type_pack_expansion
0x7fffefc14150>, args=<tree_vec 0x7fffefc10940>, complain=0,
in_decl=<parm_decl 0x7fffefae7180 args2>) at ../../gcc/cp/pt.c:11497
#10 0x00000000009fbc98 in tsubst_decl (t=<parm_decl 0x7fffefae7180 args2>,
args=<tree_vec 0x7fffefc10940>, complain=0) at ../../gcc/cp/pt.c:12711
#11 0x00000000009ff9b3 in tsubst (t=<parm_decl 0x7fffefae7180 args2>,
args=<tree_vec 0x7fffefc10940>, complain=0,
in_decl=<parm_decl 0x7fffefae7180 args2>) at ../../gcc/cp/pt.c:13577
#12 0x00000000009fc3f1 in tsubst_decl (t=<parm_decl 0x7fffefae7100 args>,
args=<tree_vec 0x7fffefc10940>, complain=0) at ../../gcc/cp/pt.c:12793
#13 0x00000000009f4458 in tsubst_pack_expansion (t=<type_pack_expansion
0x7fffefc14150>, args=<tree_vec 0x7fffefc10940>, complain=0,
in_decl=<parm_decl 0x7fffefae7180 args2>) at ../../gcc/cp/pt.c:11497
).
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Subject: [Bug sanitizer/83014] ICE in pretty-print with -fsanitize=bounds
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Nov 24 08:35:10 2017
New Revision: 255134
URL: https://gcc.gnu.org/viewcvs?rev=255134&root=gcc&view=rev
Log:
PR sanitizer/83014
* ubsan.c (ubsan_type_descriptor): Use pp_unsigned_wide_integer
instead of pp_printf with HOST_WIDE_INT_PRINT_DEC. Avoid calling
tree_to_uhwi twice.
* gcc.dg/ubsan/pr83014.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/ubsan/pr83014.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/ubsan.c
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Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
How does this work with OpenMP and compiler/FE generated temporary arrays?
If I just do
!$OMP parallel do
do i = 1,nsplit
pi(i) = sum(compute( low(i), high(i) ))
end do
I still get
#pragma omp parallel
{
{
#pragma omp for private(i) nowait
for (i = 1; i <= 4; i = i + 1)
{
{
real(kind=4) val.4;
integer(kind=8) * D.3617;
integer(kind=8) * D.3618;
struct array1_real(kind=4) atmp.5;
real(kind=4) A.6[4];
...
atmp.5.data = (void * restrict) &A.6;
atmp.5.offset = 0;
compute (&atmp.5, D.3617, D.3618);
and after lower:
.omp_data_o.17.high = &high;
.omp_data_o.17.low = &low;
.omp_data_o.17.pi = π
#pragma omp parallel shared(pi) shared(low) shared(high) [child fn:
MAIN__._omp_fn.0 (.omp_data_o.17)]
.omp_data_i = (struct .omp_data_s.16 & restrict) &.omp_data_o.17;
#pragma omp for private(i) nowait
for (i = 1; i <= 4; i = i + 1)
try
{
val.4 = 0.0;
D.3644 = i + -1;
D.3674 = .omp_data_i->low;
D.3617 = &*D.3674[D.3644];
D.3644 = i + -1;
D.3675 = .omp_data_i->high;
D.3618 = &*D.3675[D.3644];
atmp.5.dtype = 281;
atmp.5.dim[0].stride = 1;
atmp.5.dim[0].lbound = 0;
atmp.5.dim[0].ubound = 3;
atmp.5.data = &A.6;
but somehow OMP expansion duplicated A.6 into the child function. Does it
simply look at the BLOCK_VARs and duplicates them all, replacing what is
used in the body? There is separate_decls_in_region that I guess is supposed
to do that for autopar, but it only looks at SSA names. So it must be really
the OMP (SSA) lowering that was supposed to handle this duplication? At least
for the OMP example above I don't see anything explicitely marking A.6/atmp
as non-shared.
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Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Jakub, see last comment for OMP expansion question.
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Subject: [Bug fortran/83076] [8 Regression] ICE in gfc_deallocate_scalar_with_status, at fortran/trans.c:1598
Date: Fri, 24 Nov 2017 08:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83076
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
CC| |jakub at gcc dot gnu.org,
| |pault at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r254427.
>From gcc-bugs-return-582942-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 08:46:09 2017
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Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
Date: Fri, 24 Nov 2017 08:46:00 -0000
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
There should be no duplication except for vars mentioned in the clauses on
OpenMP constructs (explicit or implicit). So, vars declared outside of the
region and referenced inside of the region are either implicitly or explicitly
shared/privatized/mapped etc. and vars defined inside of the region are just
moved to the new outlined function. We move there the whole BLOCK subtree that
is fully contained within the region and the vars too.
>From gcc-bugs-return-582943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 08:51:52 2017
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Subject: [Bug fortran/36313] [F03] {MIN,MAX}{LOC,VAL} should accept character arguments
Date: Fri, 24 Nov 2017 08:51:00 -0000
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--- Comment #13 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Author: jb
Date: Fri Nov 24 08:51:15 2017
New Revision: 255135
URL: https://gcc.gnu.org/viewcvs?rev=255135&root=gcc&view=rev
Log:
PR 36313 Replace int with gfc_charlen_type, take 3
Still some prototypes that didn't match the implementation.
2017-11-24 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/36313
* m4/maxloc2s.m4: Replace int with gfc_charlen_type, take 3.
* m4/minloc2s.m4: Likewise.
* generated/maxloc2_16_s1.c: Regenerated.
* generated/maxloc2_16_s4.c: Regenerated.
* generated/maxloc2_4_s1.c: Regenerated.
* generated/maxloc2_4_s4.c: Regenerated.
* generated/maxloc2_8_s1.c: Regenerated.
* generated/maxloc2_8_s4.c: Regenerated.
* generated/minloc2_16_s1.c: Regenerated.
* generated/minloc2_16_s4.c: Regenerated.
* generated/minloc2_4_s1.c: Regenerated.
* generated/minloc2_4_s4.c: Regenerated.
* generated/minloc2_8_s1.c: Regenerated.
* generated/minloc2_8_s4.c: Regenerated.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/generated/maxloc2_16_s1.c
trunk/libgfortran/generated/maxloc2_16_s4.c
trunk/libgfortran/generated/maxloc2_4_s1.c
trunk/libgfortran/generated/maxloc2_4_s4.c
trunk/libgfortran/generated/maxloc2_8_s1.c
trunk/libgfortran/generated/maxloc2_8_s4.c
trunk/libgfortran/generated/minloc2_16_s1.c
trunk/libgfortran/generated/minloc2_16_s4.c
trunk/libgfortran/generated/minloc2_4_s1.c
trunk/libgfortran/generated/minloc2_4_s4.c
trunk/libgfortran/generated/minloc2_8_s1.c
trunk/libgfortran/generated/minloc2_8_s4.c
trunk/libgfortran/m4/maxloc2s.m4
trunk/libgfortran/m4/minloc2s.m4
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Subject: [Bug fortran/81841] [6/7 Regression] THREADPRIVATE (OpenMP) wrongly rejected in BLOCK DATA
Date: Fri, 24 Nov 2017 08:58:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Summary|[6/7/8 Regression] |[6/7 Regression]
|THREADPRIVATE (OpenMP) |THREADPRIVATE (OpenMP)
|wrongly rejected in BLOCK |wrongly rejected in BLOCK
|DATA |DATA
--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-582945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 09:06:19 2017
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Subject: [Bug tree-optimization/81740] [6/7/8 Regression] wrong code at -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu
Date: Fri, 24 Nov 2017 09:06:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Testcase modified for the testsuite:
int a[8][10] = { [2][5] = 4 }, c;
int
main ()
{
short b;
int i, d;
for (b = 4; b >= 0; b--)
for (c = 0; c <= 6; c++)
a[c + 1][b + 2] = a[c][b + 1];
for (i = 0; i < 8; i++)
for (d = 0; d < 10; d++)
if (a[i][d] != (i == 3 && d == 6) * 4)
__builtin_abort ();
return 0;
}
>From gcc-bugs-return-582946-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 09:15:44 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
Date: Fri, 24 Nov 2017 09:15:00 -0000
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--- Comment #12 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 24 Nov 2017, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83064
>
> --- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> There should be no duplication except for vars mentioned in the clauses on
> OpenMP constructs (explicit or implicit). So, vars declared outside of the
> region and referenced inside of the region are either implicitly or explicitly
> shared/privatized/mapped etc. and vars defined inside of the region are just
> moved to the new outlined function. We move there the whole BLOCK subtree that
> is fully contained within the region and the vars too.
Yes, that's what I'm seeing with OMP but I'm not seeing that with
autopar. Ah, it looks like autopar identifies the "local" as to be
globalized in eliminate_local_variables_stmt.
So it would need to somehow detect whether a variable "belongs" to
the loop we are parallelizing. Which means detecting whether a BLOCK
belongs to a loop? I guess OMP expansion has an easier job here
given it has an IL that is much closer to source form...
Would we want to record sth like a BLOCK for the scope of a
loop in the loop structure? We'd also rely on the CLOBBERs
inside to avoid leaking uses/defs.
Of course a "simple" liveness analysis like that done during
RTL expansion is possible as well. But I fear that it might
not be good enough.
>From gcc-bugs-return-582947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 09:19:30 2017
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Subject: [Bug c/83139] New: error: null destination pointer [-Werror=format-truncation=] for second call with same destination pointer
Date: Fri, 24 Nov 2017 09:19:00 -0000
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Bug ID: 83139
Summary: error: null destination pointer
[-Werror=format-truncation=] for second call with same
destination pointer
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: jak@jak-linux.org
Target Milestone: ---
Created attachment 42701
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42701&action=edit
Example
In the attached example (minified proxychains common.c), there are two cases of
snprintf(pbuf, bufsize, in a function. The second one causes an error, at -O2
or higher:
$ gcc -Wall -Werror -O2 -c -v -save-temps common.c
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 7.2.0-16'
--with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.2.0 (Debian 7.2.0-16)
COLLECT_GCC_OPTIONS='-Wall' '-Werror' '-O2' '-c' '-v' '-save-temps'
'-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/7/cc1 -E -quiet -v -imultiarch x86_64-linux-gnu
common.c -mtune=generic -march=x86-64 -Wall -Werror -O2 -fpch-preprocess -o
common.i
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/7/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-linux-gnu/7/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/7/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-Wall' '-Werror' '-O2' '-c' '-v' '-save-temps'
'-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/7/cc1 -fpreprocessed common.i -quiet -dumpbase
common.c -mtune=generic -march=x86-64 -auxbase common -O2 -Wall -Werror
-version -o common.s
GNU C11 (Debian 7.2.0-16) version 7.2.0 (x86_64-linux-gnu)
compiled by GNU C version 7.2.0, GMP version 6.1.2, MPFR version 3.1.6,
MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (Debian 7.2.0-16) version 7.2.0 (x86_64-linux-gnu)
compiled by GNU C version 7.2.0, GMP version 6.1.2, MPFR version 3.1.6,
MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 4f65f393f8f34cf4758c10c601ec207f
common.c: In function ‘get_config_path’:
common.c:29:2: error: null destination pointer [-Werror=format-truncation=]
snprintf(pbuf, bufsize, "%s/.proxychains/%s", path, PROXYCHAINS_CONF_FILE);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
If the pointer was not NULL before, and there is no char** pointer at all,
there seems to be no way it could suddenly become NULL, so the error is wrong.
>From gcc-bugs-return-582948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 09:20:16 2017
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--- Comment #1 from Julian Andres Klode <jak@jak-linux.org> ---
Created attachment 42702
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42702&action=edit
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83128] Unable to optimize {m,c}alloc when strings builtin are used
Date: Fri, 24 Nov 2017 09:41:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Nov 24 09:40:40 2017
New Revision: 255136
URL: https://gcc.gnu.org/viewcvs?rev=255136&root=gcc&view=rev
Log:
2017-11-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/83128
* tree-ssa-sccvn.c (fully_constant_vn_reference_p): Handle STRING_CSTs.
(vn_reference_lookup_3): Likewise.
* gcc.dg/tree-ssa/ssa-fre-62.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-62.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/83128] Unable to optimize {m,c}alloc when strings builtin are used
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-582951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 10:10:21 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
Date: Fri, 24 Nov 2017 10:10:00 -0000
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--- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > I confirm that using
> >
> > pik = compute( low(i), high(i) )
> > pi(i) = sum(pik)
> >
> > gives the right result.
> >
> > Does it means that the 'sum' in 'sum(compute( low(i), high(i) ))'
> > is not part of the parallelization?
> no idea, I can't do the above, pik is not declared.
As said in comment 5,
real(real64), dimension(nsplit) :: pi
has to be replaced with
real(real64), dimension(nsplit) :: pi, pik
With my limited understanding of DO CONCURRENT,
do concurrent (i = 1:nsplit)
body(i)
end do
the evaluations of 'body' for different values of 'i' are independent. I think
that implied that all the temporaries generated in body have to be local.
>From gcc-bugs-return-582952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 10:16:41 2017
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Subject: [Bug c/83139] error: null destination pointer [-Werror=format-truncation=] for second call with same destination pointer
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--- Comment #2 from Julian Andres Klode <jak@jak-linux.org> ---
Apparently, this is because check_path() is being inlined and checks that the
argument is NULL. Then when it sees the second use of pbuf, it considers it
possible that it is NULL.
I'm not sure it's really a bug. It depends on whether it would do the same if
check_path() were used elsewhere where the !pbuf check is actually important.
>From gcc-bugs-return-582953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 10:17:48 2017
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Subject: [Bug libstdc++/83140] New: assoc_legendre returns negated value when m is odd
Date: Fri, 24 Nov 2017 10:17:00 -0000
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Bug ID: 83140
Summary: assoc_legendre returns negated value when m is odd
Product: gcc
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In the standard, Legendre polynomials and associated Legendre functions are
defined as
P_l = (1 / 2^l l!) d^l/dx^l (x^2 - 1)^l,
and
P_l^m = (1 - x^2)^(m/2) d^m/dx^m P_l,
respectively.
Then, for example, P_1^1 should be √(1 - x^2), but GCC returns -√(1 - x^2): the
return value of std::assoc_legendre(1, 1, 0.5) is -0.866.
GCC's implementation uses recurrence of associated Legendre function
P_m^m = (-1)^m (2m - 1)!! (1 - x^2)^(m/2),
but this corresponds to
P_l^m = (-1)^m (1 - x^2)^(m/2) d^m/dx^m P_l.
Namely, std::assoc_legendre returns negated value when m is odd.
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Subject: [Bug c++/81675] [6/7/8 Regression] attribute(noreturn) of destructor in :? not honored
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42703
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gcc8-pr81675.patch
Untested fix.
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Subject: [Bug rtl-optimization/81553] [7/8 Regression] ICE in immed_wide_int_const, at emit-rtl.c:607
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----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42704
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gcc8-pr81553.patch
Untested fix.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83141] New: SRA and memcpy folding interact badly generating wrong-code
Date: Fri, 24 Nov 2017 11:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83141
Bug ID: 83141
Summary: SRA and memcpy folding interact badly generating
wrong-code
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
/* { dg-do run } */
struct A { short s; long i; long j; };
struct A a, b;
void foo ()
{
struct A c;
__builtin_memcpy (&c, &b, sizeof (struct A));
__builtin_memcpy (&a, &c, sizeof (struct A));
}
int main()
{
__builtin_memset (&b, 0, sizeof (struct A));
b.s = 1;
__builtin_memcpy ((char *)&b + sizeof (short), &b, sizeof (short));
foo ();
__builtin_memcpy (&a, (char *)&a + sizeof (short), sizeof (short));
if (a.s != 1)
__builtin_abort ();
return 0;
}
>From gcc-bugs-return-582957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 11:25:32 2017
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
Date: Fri, 24 Nov 2017 11:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83015
--- Comment #19 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Fri Nov 24 11:24:55 2017
New Revision: 255138
URL: https://gcc.gnu.org/viewcvs?rev=255138&root=gcc&view=rev
Log:
PR bootstrap/83015
* ipa-inline.c (inline_small_functions): Set current badnes correctly
when skipping checking.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-inline.c
>From gcc-bugs-return-582958-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 11:27:57 2017
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Subject: [Bug target/81535] [8 regression] gcc.target/powerpc/pr79439.c fails starting with r250442
Date: Fri, 24 Nov 2017 11:27:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Any progress with this?
>From gcc-bugs-return-582959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 11:29:36 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/81470] [8 Regression] Bootstrap comparison failures in gcc/ada
Date: Fri, 24 Nov 2017 11:29:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Is this still a problem? At least on x86_64-linux many people have done many
successful bootstraps with ada since then.
>From gcc-bugs-return-582960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 11:30:44 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83141] SRA and memcpy folding interact badly generating wrong-code
Date: Fri, 24 Nov 2017 11:30:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-24
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-582961-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 11:30:46 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/81465] [8 Regression] ICE in estimate_edge_growth at gcc/ipa-inline.h:85 on s390x target
Date: Fri, 24 Nov 2017 11:30:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Any progress on this?
>From gcc-bugs-return-582962-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 11:38:44 2017
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From: "ygribov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81535] [8 regression] gcc.target/powerpc/pr79439.c fails starting with r250442
Date: Fri, 24 Nov 2017 11:38:00 -0000
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--- Comment #6 from Yury Gribov <ygribov at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #5)
> Any progress with this?
I filed patch back then
(https://gcc.gnu.org/ml/gcc-patches/2017-07/msg01873.html) and missed reply
from Segher. I'll reply to his comments in gcc-patches today.
>From gcc-bugs-return-582963-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 11:39:59 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81456] [7/8 Regression] x86-64 optimizer makes wrong decision when optimizing for size
Date: Fri, 24 Nov 2017 11:39:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yeah, the earlier in the optimization pipeline we need to make decisions, the
more approximate the cost models are, unless we have infinite compile time and
compile memory resources, we can't try both alternatives with all subsequent
passes and choose what is in the end better; so, before RA we can't know what
the register allocation will need to do with the code.
-Os certainly doesn't and can't guarantee the resulting code will be always
smaller than or equal to code with -O2, what matters is whether it creates
smaller code on large amounts of real-world code; so, we generally choose to do
or not to do optimizations where we know they do or don't generally result in
smaller code on average. You can always find counter-examples where the
heuristics just doesn't handle a particular case in the end well.
Not convinced we need to track each such case.
>From gcc-bugs-return-582964-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 11:44:06 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/81470] [8 Regression] Bootstrap comparison failures in gcc/ada
Date: Fri, 24 Nov 2017 11:44:00 -0000
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--- Comment #3 from Rainer Emrich <rainer@emrich-ebersheim.de> ---
(In reply to Jakub Jelinek from comment #2)
> Is this still a problem? At least on x86_64-linux many people have done
> many successful bootstraps with ada since then.
I will test next week, when I find the time.
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Subject: [Bug lto/81406] [6/7/8 Regression] ICE in check_die, at dwarf2out.c:6185
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Can't reproduce with current trunk.
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/79008] missing detail in -Wbuiltin-declaration-mismatch
Date: Fri, 24 Nov 2017 12:34:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed|2017-08-22 00:00:00 |2017-11-24
Ever confirmed|0 |1
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #2)
> I think what I had in mind was incompatible attribute specifications rather
> than missing ones but my description sounds a little confused.
> -Wbuiltin-declaration-mismatch also doesn't diagnose incompatible attributes
> (maybe it should).
>
> One example of an incompatibility is the following declaration:
>
> int __attribute__ ((pure)) abs (int);
>
> where abs() the built-in is actually declared const. GCC doesn't currently
> diagnose this except with my patch for bug 81544 (yet to be reviewed).
>
> Another, slightly different, example is declaring a standard library
> function with the wrong attributes, like this one:
>
> void* __attribute__ ((malloc, alloc_size (1))) realloc (void*, size_t);
>
> This is wrong on two counts: first, realloc cannot be declared with
> attribute malloc because it need not return a unique pointer. Second,
> alloc_size specifies the wrong argument (this is bug 78667).
>
> Since many built-in functions are decorated with multiple attributes it
> seems that rather than pointing out these kinds of issues one attribute at a
> time (either when there are more than one or as the user adjusts their
> declaration) it would be simpler and more user-friendly to include in the
> diagnostic all the attributes the built-in is decorated with. Hence the
> suggestion to introduce a a new flag (and perhaps also a conversion
> specifier) to the pretty printer to have it (optionally) print the whole
> attribute list, or parts of it.
>
> E.g.,
>
> warning ("%#qD conflicts with built-in declaration %#qD", user_decl,
> builtin_in_decl);
>
> might print
>
> warning: ‘int abs(int) __attribute__ ((pure))’ conflicts with built-in
> declaration ‘int abs(int) __attribute__ ((const))’
Confirmed.
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Subject: [Bug tree-optimization/82402] [6/7 Regression] error: SSA_NAME_OCCURS_IN_ABNORMAL_PHI should be set
Date: Fri, 24 Nov 2017 12:34:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Nov 24 12:34:23 2017
New Revision: 255140
URL: https://gcc.gnu.org/viewcvs?rev=255140&root=gcc&view=rev
Log:
2017-11-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82402
* tree-vect-loop-manip.c (create_lcssa_for_virtual_phi): Properly
set SSA_NAME_OCCURS_IN_ABNORMAL_PHI.
* gcc.dg/torture/pr82402.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr82402.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-loop-manip.c
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Subject: [Bug tree-optimization/82402] [6/7 Regression] error: SSA_NAME_OCCURS_IN_ABNORMAL_PHI should be set
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.0
Summary|[6/7/8 Regression] error: |[6/7 Regression] error:
|SSA_NAME_OCCURS_IN_ABNORMAL |SSA_NAME_OCCURS_IN_ABNORMAL
|_PHI should be set |_PHI should be set
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-582969-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 12:41:42 2017
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Subject: [Bug tree-optimization/82991] memcpy and strcpy return value can be assumed to be equal to first argument
Date: Fri, 24 Nov 2017 12:41:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 42705
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42705&action=edit
patch
Things got stuck on _b_o_s fallout. See
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg02113.html and followups.
Attaching what I have currently, no time to rescue things on the _b_o_s side.
I think we should eventually forgo the idea that IPA inlining might help
getting accurate _b_o_s results and instead rely on early optimized bodies
being early inlined into contexts where the passed addresses are still in
original form. Thus do everything in
NEXT_PASS (pass_object_sizes, true /* insert_min_max_p */);
I have yet to see a testcase from the real world where IPA inlining uncovered a
bug.
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Subject: [Bug tree-optimization/83142] New: Missed tail-call opportunity
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Bug ID: 83142
Summary: Missed tail-call opportunity
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
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The following is not tail-called even though memmove returns dest (and the
compiler knows that):
struct A { int i; int j; int k; };
void *bar (struct A *dest, struct A *src)
{
__builtin_memmove (dest, src, sizeof (struct A));
return dest;
}
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Subject: [Bug tree-optimization/82991] memcpy and strcpy return value can be assumed to be equal to first argument
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Depends on| |83142
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Another concern was tail-call optimization which needs to learn that
foo (x);
return x;
can be tail-called when foo is returning the argument we return from the
function. Not too difficult to add.
We don't seem to have a testcase verifying tail-calling of memcpy or another
function returning an argument, so this is an invisible regression of the
patch.
struct A { int i; int j; int k; };
void *bar (struct A *dest, struct A *src)
{
return __builtin_memmove (dest, src, sizeof (struct A));
}
is optimized to the following at -O2 but no longer with the current patch:
bar:
.LFB0:
.cfi_startproc
movl $12, %edx
jmp memmove
the following testcase isn't optimized:
struct A { int i; int j; int k; };
void *bar (struct A *dest, struct A *src)
{
__builtin_memmove (dest, src, sizeof (struct A));
return dest;
}
both should be after a suitable fix. -> PR83142.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83142
[Bug 83142] Missed tail-call opportunity
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Subject: [Bug target/83143] New: [SH]: Assembler messages: invalid operands (*UND* and .text sections) for `-'
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83143
Bug ID: 83143
Summary: [SH]: Assembler messages: invalid operands (*UND* and
.text sections) for `-'
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: glaubitz at physik dot fu-berlin.de
Target Milestone: ---
Created attachment 42706
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42706&action=edit
C source code file which causes the miscompiled code
Trying to build mesa on Debian unstable (sh4) with gcc-7.2.0 fails with:
(sid-sh4-sbuild)root@nofan:/build/mesa-D7X6g9/mesa-17.2.4/build# make
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
Making all in src
make[1]: Entering directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src'
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
updating git_sha1.h
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
/usr/bin/make all-recursive
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
make[2]: Entering directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src'
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
Making all in .
make[3]: Entering directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src'
make[3]: Nothing to be done for 'all-am'.
make[3]: Leaving directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src'
Making all in gtest
make[3]: Entering directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/gtest'
make[3]: Nothing to be done for 'all'.
make[3]: Leaving directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/gtest'
Making all in util
make[3]: Entering directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/util'
/usr/bin/make all-recursive
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
make[4]: Entering directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/util'
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
Making all in .
make[5]: Entering directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/util'
make[5]: Nothing to be done for 'all-am'.
make[5]: Leaving directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/util'
Making all in tests/hash_table
make[5]: Entering directory
'/build/mesa-D7X6g9/mesa-17.2.4/build/src/util/tests/hash_table'
make[5]: Nothing to be done for 'all'.
make[5]: Leaving directory
'/build/mesa-D7X6g9/mesa-17.2.4/build/src/util/tests/hash_table'
make[4]: Leaving directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/util'
make[3]: Leaving directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/util'
Making all in mapi/glapi/gen
make[3]: Entering directory
'/build/mesa-D7X6g9/mesa-17.2.4/build/src/mapi/glapi/gen'
/usr/bin/make all-am
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
make[4]: Entering directory
'/build/mesa-D7X6g9/mesa-17.2.4/build/src/mapi/glapi/gen'
make[4]: Nothing to be done for 'all-am'.
make[4]: Leaving directory
'/build/mesa-D7X6g9/mesa-17.2.4/build/src/mapi/glapi/gen'
make[3]: Leaving directory
'/build/mesa-D7X6g9/mesa-17.2.4/build/src/mapi/glapi/gen'
Making all in mapi
make[3]: Entering directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/mapi'
/usr/bin/make all-recursive
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
make[4]: Entering directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/mapi'
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
make[5]: Entering directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/mapi'
make[5]: Nothing to be done for 'all-am'.
make[5]: Leaving directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/mapi'
make[4]: Leaving directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/mapi'
make[3]: Leaving directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/mapi'
Making all in compiler
make[3]: Entering directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/compiler'
/usr/bin/make all-am
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
make[4]: Entering directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/compiler'
/bin/bash ../../libtool --tag=CC --mode=compile gcc -DPACKAGE_NAME=\"Mesa\"
-DPACKAGE_TARNAME=\"mesa\" -DPACKAGE_VERSION=\"17.2.4\"
-DPACKAGE_STRING=\"Mesa\ 17.2.4\"
-DPACKAGE_BUGREPORT=\"https://bugs.freedesktop.org/enter_bug.cgi\?product=Mesa\"
-DPACKAGE_URL=\"\" -DPACKAGE=\"mesa\" -DVERSION=\"17.2.4\"
-D_FILE_OFFSET_BITS=64 -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1
-DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1
-DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1
-DHAVE_DLFCN_H=1 -DLT_OBJDIR=\".libs/\" -DHAVE___BUILTIN_BSWAP32=1
-DHAVE___BUILTIN_BSWAP64=1 -DHAVE___BUILTIN_CLZ=1 -DHAVE___BUILTIN_CLZLL=1
-DHAVE___BUILTIN_CTZ=1 -DHAVE___BUILTIN_EXPECT=1 -DHAVE___BUILTIN_FFS=1
-DHAVE___BUILTIN_FFSLL=1 -DHAVE___BUILTIN_POPCOUNT=1
-DHAVE___BUILTIN_POPCOUNTLL=1 -DHAVE___BUILTIN_UNREACHABLE=1
-DHAVE_FUNC_ATTRIBUTE_CONST=1 -DHAVE_FUNC_ATTRIBUTE_FLATTEN=1
-DHAVE_FUNC_ATTRIBUTE_FORMAT=1 -DHAVE_FUNC_ATTRIBUTE_MALLOC=1
-DHAVE_FUNC_ATTRIBUTE_PACKED=1 -DHAVE_FUNC_ATTRIBUTE_PURE=1
-DHAVE_FUNC_ATTRIBUTE_RETURNS_NONNULL=1 -DHAVE_FUNC_ATTRIBUTE_UNUSED=1
-DHAVE_FUNC_ATTRIBUTE_VISIBILITY=1 -DHAVE_FUNC_ATTRIBUTE_WARN_UNUSED_RESULT=1
-DHAVE_FUNC_ATTRIBUTE_WEAK=1 -DHAVE_FUNC_ATTRIBUTE_ALIAS=1
-DMAJOR_IN_SYSMACROS=1 -DHAVE_DLADDR=1 -DHAVE_CLOCK_GETTIME=1 -DHAVE_PTHREAD=1
-I. -I../../../src/compiler -I../../../include -I../../../src
-I../../../src/mapi -I../../../src/mesa/ -I../../src/compiler/glsl
-I../../../src/compiler/glsl -I../../../src/compiler/glsl/glcpp
-I../../src/compiler/nir -I../../../src/compiler/nir
-I../../../src/compiler/spirv -I../../../src/gallium/include
-I../../../src/gallium/auxiliary -I../../../src/gtest/include
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-D_GNU_SOURCE -DUSE_GCC_ATOMIC_BUILTINS -DMISSING_64BIT_ATOMICS -DNDEBUG
-DTEXTURE_FLOAT_ENABLED -DHAVE_XLOCALE_H -DHAVE_SYS_SYSCTL_H -DHAVE_STRTOF
-DHAVE_MKOSTEMP -DHAVE_STRTOD_L -DHAVE_DLOPEN -DHAVE_DL_ITERATE_PHDR
-DHAVE_POSIX_MEMALIGN -DHAVE_GALLIUM_EXTRA_HUD=1 -DHAVE_LIBSENSORS=1
-DUSE_LIBGLVND=1 -DHAVE_LIBDRM -DGLX_USE_DRM -DGLX_INDIRECT_RENDERING
-DGLX_DIRECT_RENDERING -DGLX_USE_TLS -DHAVE_X11_PLATFORM
-DHAVE_SURFACELESS_PLATFORM -DHAVE_WAYLAND_PLATFORM -DHAVE_DRM_PLATFORM
-DHAVE_DRI3 -DENABLE_SHADER_CACHE -DHAVE_MINCORE -DHAVE_ST_VDPAU -Wdate-time
-D_FORTIFY_SOURCE=2 -fvisibility=hidden -Werror=pointer-arith -Werror=vla -g
-O2 -fdebug-prefix-map=/build/mesa-D7X6g9/mesa-17.2.4=.
-fstack-protector-strong -Wformat -Werror=format-security -Wall -Wall -std=c99
-Werror=implicit-function-declaration -Werror=missing-prototypes
-fno-math-errno -fno-trapping-math -c -o nir/nir_lower_int64.lo
../../../src/compiler/nir/nir_lower_int64.c
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
libtool: compile: gcc -DPACKAGE_NAME=\"Mesa\" -DPACKAGE_TARNAME=\"mesa\"
-DPACKAGE_VERSION=\"17.2.4\" "-DPACKAGE_STRING=\"Mesa 17.2.4\""
"-DPACKAGE_BUGREPORT=\"https://bugs.freedesktop.org/enter_bug.cgi?product=Mesa\""
-DPACKAGE_URL=\"\" -DPACKAGE=\"mesa\" -DVERSION=\"17.2.4\"
-D_FILE_OFFSET_BITS=64 -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1
-DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1
-DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1
-DHAVE_DLFCN_H=1 -DLT_OBJDIR=\".libs/\" -DHAVE___BUILTIN_BSWAP32=1
-DHAVE___BUILTIN_BSWAP64=1 -DHAVE___BUILTIN_CLZ=1 -DHAVE___BUILTIN_CLZLL=1
-DHAVE___BUILTIN_CTZ=1 -DHAVE___BUILTIN_EXPECT=1 -DHAVE___BUILTIN_FFS=1
-DHAVE___BUILTIN_FFSLL=1 -DHAVE___BUILTIN_POPCOUNT=1
-DHAVE___BUILTIN_POPCOUNTLL=1 -DHAVE___BUILTIN_UNREACHABLE=1
-DHAVE_FUNC_ATTRIBUTE_CONST=1 -DHAVE_FUNC_ATTRIBUTE_FLATTEN=1
-DHAVE_FUNC_ATTRIBUTE_FORMAT=1 -DHAVE_FUNC_ATTRIBUTE_MALLOC=1
-DHAVE_FUNC_ATTRIBUTE_PACKED=1 -DHAVE_FUNC_ATTRIBUTE_PURE=1
-DHAVE_FUNC_ATTRIBUTE_RETURNS_NONNULL=1 -DHAVE_FUNC_ATTRIBUTE_UNUSED=1
-DHAVE_FUNC_ATTRIBUTE_VISIBILITY=1 -DHAVE_FUNC_ATTRIBUTE_WARN_UNUSED_RESULT=1
-DHAVE_FUNC_ATTRIBUTE_WEAK=1 -DHAVE_FUNC_ATTRIBUTE_ALIAS=1
-DMAJOR_IN_SYSMACROS=1 -DHAVE_DLADDR=1 -DHAVE_CLOCK_GETTIME=1 -DHAVE_PTHREAD=1
-I. -I../../../src/compiler -I../../../include -I../../../src
-I../../../src/mapi -I../../../src/mesa/ -I../../src/compiler/glsl
-I../../../src/compiler/glsl -I../../../src/compiler/glsl/glcpp
-I../../src/compiler/nir -I../../../src/compiler/nir
-I../../../src/compiler/spirv -I../../../src/gallium/include
-I../../../src/gallium/auxiliary -I../../../src/gtest/include
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-D_GNU_SOURCE -DUSE_GCC_ATOMIC_BUILTINS -DMISSING_64BIT_ATOMICS -DNDEBUG
-DTEXTURE_FLOAT_ENABLED -DHAVE_XLOCALE_H -DHAVE_SYS_SYSCTL_H -DHAVE_STRTOF
-DHAVE_MKOSTEMP -DHAVE_STRTOD_L -DHAVE_DLOPEN -DHAVE_DL_ITERATE_PHDR
-DHAVE_POSIX_MEMALIGN -DHAVE_GALLIUM_EXTRA_HUD=1 -DHAVE_LIBSENSORS=1
-DUSE_LIBGLVND=1 -DHAVE_LIBDRM -DGLX_USE_DRM -DGLX_INDIRECT_RENDERING
-DGLX_DIRECT_RENDERING -DGLX_USE_TLS -DHAVE_X11_PLATFORM
-DHAVE_SURFACELESS_PLATFORM -DHAVE_WAYLAND_PLATFORM -DHAVE_DRM_PLATFORM
-DHAVE_DRI3 -DENABLE_SHADER_CACHE -DHAVE_MINCORE -DHAVE_ST_VDPAU -Wdate-time
-D_FORTIFY_SOURCE=2 -fvisibility=hidden -Werror=pointer-arith -Werror=vla -g
-O2 -fdebug-prefix-map=/build/mesa-D7X6g9/mesa-17.2.4=.
-fstack-protector-strong -Wformat -Werror=format-security -Wall -Wall -std=c99
-Werror=implicit-function-declaration -Werror=missing-prototypes
-fno-math-errno -fno-trapping-math -c
../../../src/compiler/nir/nir_lower_int64.c -fPIC -DPIC -o
nir/.libs/nir_lower_int64.o
../../libtool: line 1761: warning: setlocale: LC_ALL: cannot change locale
(en_US.UTF-8)
/tmp/cciuynF1.s: Assembler messages:
/tmp/cciuynF1.s:19366: Error: invalid operands (*UND* and .text sections) for
`-'
/tmp/cciuynF1.s:21831: Error: invalid operands (*UND* and .text sections) for
`-'
/tmp/cciuynF1.s:23865: Error: invalid operands (*UND* and .text sections) for
`-'
/tmp/cciuynF1.s:27010: Error: invalid operands (*UND* and .text sections) for
`-'
Makefile:2395: recipe for target 'nir/nir_lower_int64.lo' failed
make[4]: *** [nir/nir_lower_int64.lo] Error 1
make[4]: Leaving directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/compiler'
Makefile:1555: recipe for target 'all' failed
make[3]: *** [all] Error 2
make[3]: Leaving directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src/compiler'
Makefile:855: recipe for target 'all-recursive' failed
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src'
Makefile:646: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory '/build/mesa-D7X6g9/mesa-17.2.4/build/src'
Makefile:652: recipe for target 'all-recursive' failed
make: *** [all-recursive] Error 1
(sid-sh4-sbuild)root@nofan:/build/mesa-D7X6g9/mesa-17.2.4/build#
Attaching the source code file as well as all generated files (*.s, *.i and
*.o).
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83143] [SH]: Assembler messages: invalid operands (*UND* and .text sections) for `-'
Date: Fri, 24 Nov 2017 12:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83143
--- Comment #1 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
Created attachment 42707
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42707&action=edit
Intermediate source for nir_lower_int64.c
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83143] [SH]: Assembler messages: invalid operands (*UND* and .text sections) for `-'
Date: Fri, 24 Nov 2017 12:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83143
--- Comment #2 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
Created attachment 42708
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42708&action=edit
Generated assembly for nir_lower_int64.c (gzipped)
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From: "joel.falcou at lri dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83144] New: ICE using trailing return type and constexpr with GCC 7.X
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83144
Bug ID: 83144
Summary: ICE using trailing return type and constexpr with GCC
7.X
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: joel.falcou at lri dot fr
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Created attachment 42709
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42709&action=edit
ICE using trailing return type and constexpr with GCC 7.X
ICE using trailing return type and constexpr with GCC 7.X
This is easily worked-around but clang and g++ 5.4 compile it without issues.
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Subject: [Bug target/83143] [SH]: Assembler messages: invalid operands (*UND* and .text sections) for `-'
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--- Comment #3 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
Created attachment 42710
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42710&action=edit
Generated object for nir_lower_int64.c
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Subject: [Bug tree-optimization/83141] SRA and memcpy folding interact badly generating wrong-code
Date: Fri, 24 Nov 2017 12:58:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg02199.html regresses
gfortran.dg/pr45636.f90 because Jakubs pattern matching in
tree-ssa-forwprop.c:simplify_builtin_call no longer applies ... (we fold more
memcpy
calls).
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Subject: [Bug target/83143] [SH]: Assembler messages: invalid operands (*UND* and .text sections) for `-'
Date: Fri, 24 Nov 2017 13:01:00 -0000
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--- Comment #4 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
Building with "-O0" instead of "-O2" resolves the issue.
>From gcc-bugs-return-582979-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 13:09:16 2017
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/81465] [8 Regression] ICE in estimate_edge_growth at gcc/ipa-inline.h:85 on s390x target
Date: Fri, 24 Nov 2017 13:09:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
The testcase no longer reproduces and we test that there is no inline clone in
same comdat group:
212982 marxin if (global.inlined_to && same_comdat_group)
186998 hubicka {
186998 hubicka error ("inline clone in same comdat group list");
186998 hubicka error_found = true;
186998 hubicka }
This address comment #3. Comment #2 was fixed by not estimating growth in this
case.
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Subject: [Bug sanitizer/82802] Potential UBSAN error with pointer difference (32-bits mode)
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
This seems fixed on trunk, and impossible to backport.
>From gcc-bugs-return-582982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 13:14:57 2017
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Subject: [Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #20 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug ipa/81360] [8 Regression] ice in estimate_edge_growth, at ipa-inline.h:86
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-582983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 13:22:50 2017
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Subject: [Bug target/83143] [SH]: Assembler messages: invalid operands (*UND* and .text sections) for `-'
Date: Fri, 24 Nov 2017 13:22:00 -0000
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--- Comment #5 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
It's fixed by adding "-freorder-blocks-algorithm=simple" which overrides
"-freorder-blocks-algorithm=stc" from "-O2".
>From gcc-bugs-return-582984-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 13:28:47 2017
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Subject: [Bug fortran/81304] [6/7/8 Regression] Bogus warning with -Wsurprising and -fopenmp: Type specified for intrinsic function 'min' / 'max'
Date: Fri, 24 Nov 2017 13:28:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42711
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42711&action=edit
gcc8-pr81304.patch
Untested fix.
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Subject: [Bug target/81363] [8 regression] FAIL: gcc.dg/vect/pr51581-1.c (internal compiler error)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81363
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |carll at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This went away with r250295 which reverted some earlier commit. Was the patch
reverted because of this LRA ICE, or for some other reason. I.e. can we close
it as RESOLVED/FIXED, or is there a plan to reapply the patch eventually and
something we should get RA folks involved in?
>From gcc-bugs-return-582986-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 13:55:14 2017
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From: "l.lunak at centrum dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83145] New: Ambiguous overload with templates, only GCC7 C++17 mode (regression?)
Date: Fri, 24 Nov 2017 13:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83145
Bug ID: 83145
Summary: Ambiguous overload with templates, only GCC7 C++17
mode (regression?)
Product: gcc
Version: 7.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: l.lunak at centrum dot cz
Target Milestone: ---
The following code produces an ambiguous overload error only with GCC7 in C++17
mode. GCC6 is fine, GCC7 in C++14 mode is fine, Clang5 is fine, MSVC2015/2017
are fine. It would seem to me that the first overload is more specific and thus
should be the one selected.
======
template <typename... TValues>
class Variant {
};
class BinaryOutputStream {
};
template <typename... TValues>
BinaryOutputStream& operator<<(BinaryOutputStream& stream, const
Variant<TValues...>& /*variant*/) {
return stream;
}
template <template <typename T, typename TAllocator, typename TCounter> class
TCollection,
typename T,
typename TAllocator,
typename TCounter>
BinaryOutputStream& operator<<(BinaryOutputStream& ostream, const
TCollection<T, TAllocator, TCounter>& /*arr*/) {
return ostream;
}
int main()
{
Variant<float, int, char> variant;
BinaryOutputStream stream;
stream << variant;
return 0;
}
=====
$ g++-7 -Wall -Wextra a.cpp -c -std=gnu++17
a.cpp: In function ‘int main()’:
a.cpp:25:12: error: ambiguous overload for ‘operator<<’ (operand types are
‘BinaryOutputStream’ and ‘Variant<float, int, char>’)
stream << variant;
~~~~~~~^~~~~~~~~~
a.cpp:9:21: note: candidate: BinaryOutputStream&
operator<<(BinaryOutputStream&, const Variant<TValues ...>&) [with TValues =
{float, int, char}]
BinaryOutputStream& operator<<(BinaryOutputStream& stream, const
Variant<TValues...>& /*variant*/) {
^~~~~~~~
a.cpp:17:21: note: candidate: BinaryOutputStream&
operator<<(BinaryOutputStream&, const TCollection<T, TAllocator, TCounter>&)
[with TCollection = Variant; T = float; TAllocator = int; TCounter = char]
BinaryOutputStream& operator<<(BinaryOutputStream& ostream, const
TCollection<T, TAllocator, TCounter>& /*arr*/) {
^~~~~~~~
$ g++-7 -Wall -Wextra a.cpp -c -std=gnu++14
$ g++-6 -Wall -Wextra a.cpp -c -std=gnu++17
$ clang++ -Wall -Wextra a.cpp -c -std=gnu++17
$ g++-7 -v
Using built-in specs.
COLLECT_GCC=g++-7
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/7/lto-wrapper
OFFLOAD_TARGET_NAMES=hsa:nvptx-none
Target: x86_64-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++,fortran,ada,go
--enable-offload-targets=hsa,nvptx-none=/usr/nvptx-none, --without-cuda-driver
--enable-checking=release --disable-werror
--with-gxx-include-dir=/usr/include/c++/7 --enable-ssp --disable-libssp
--disable-libvtv --disable-libcc1 --disable-plugin
--with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux'
--with-slibdir=/lib64 --with-system-zlib --enable-__cxa_atexit
--enable-libstdcxx-allocator=new --disable-libstdcxx-pch
--with-default-libstdcxx-abi=gcc4-compatible
--enable-version-specific-runtime-libs --with-gcc-major-version-only
--enable-linker-build-id --enable-linux-futex --enable-gnu-indirect-function
--program-suffix=-7 --without-system-libunwind --enable-multilib
--with-arch-32=x86-64 --with-tune=generic --build=x86_64-suse-linux
--host=x86_64-suse-linux
Thread model: posix
gcc version 7.1.1 20170607 [gcc-7-branch revision 248970] (SUSE Linux)
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Subject: [Bug c++/80792] worse code generated compared to clang when using std::tuple
Date: Fri, 24 Nov 2017 14:02:00 -0000
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
It seems that clang have fixed their ABI to generate code similar to gcc. Any
objection to closing this?
>From gcc-bugs-return-582988-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 14:08:45 2017
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Subject: [Bug target/82248] probe_stack can generate unpredictable STR on arm
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--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 23 Nov 2017, ramana at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82248
>
> --- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #2)
> > Miscompiles mpfr for us on armv7. Isn't it easy enough to handle this in
> > the insn pattern by using some non pre/post-indexed memory_operand predicate
> > and or using an early clobbered match_scratch to allocate 'r0'?
>
>
> I was testing a patch that used 'o' instead of 'm' in the constraint as that's
> just an offsettable address and would prevent post/ pre-inc type operations but
> it slipped through the cracks with travels in September :(
>
> Can you test if that is sufficient for you or what's the runes in configure for
> forcing probe_stack_range ?
Seems to work fine.
Richard.
>From gcc-bugs-return-582989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 14:18:30 2017
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Subject: [Bug c++/83145] Ambiguous overload with templates, only GCC7 C++17 mode (regression?)
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is affected by the -fnew-ttp-matching option, which is enabled by default
for C++17 and disabled otherwise. You get the same error with C++14 if you use
-fnew-tpp-matching, and it compiles with C++17 and -fno-new-ttp-matching
I think the C++17 standard requires the new behaviour, so this isn't a bug.
>From gcc-bugs-return-582990-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 14:22:05 2017
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Subject: [Bug c++/83145] Ambiguous overload with templates, only GCC7 C++17 mode (regression?)
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The new rule was introduced by
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0522r0.html
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-24
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:
namespace std
{
using size_t = decltype(sizeof(0));
template<size_t N, size_t A>
struct aligned_storage
{
struct type {
alignas(A) char _data[N];
};
};
template<size_t N, size_t A>
using aligned_storage_t = typename aligned_storage<N, A>::type;
}
template<typename T, std::size_t N>
struct Storage
{
std::aligned_storage_t<sizeof(T), alignof(T)> data[N];
};
template<typename T>
struct PoolObj
{
static void* operator new(std::size_t)
{
return &T::pool.data[0];
}
static void operator delete(void*, std::size_t)
{
}
};
template<typename T>
struct Bar : PoolObj<Bar<T>>
{
static Storage<Bar<T>, 10> pool;
};
template<typename T>
Storage<Bar<T>, 10> Bar<T>::pool {};
int main()
{
Bar<int>* b = new Bar<int>();
delete b;
}
Clang and EDG accept it.
>From gcc-bugs-return-582992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 14:37:07 2017
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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83143] [SH]: Assembler messages: invalid operands (*UND* and .text sections) for `-'
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Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at kernel dot crashing.org
--- Comment #6 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to John Paul Adrian Glaubitz from comment #2)
> Created attachment 42708 [details]
> Generated assembly for nir_lower_int64.c (gzipped)
In the asm code I see the following line ...
.L3195:
.long nir_alu_instr_create@PLT-(.LPCS230+2-.)
... but the label .LPCS230 does not not exist in the file. So I guess this is
where the error comes from. But no idea why the label is not there. AFAIR
Segher did some stuff for block reordering. Maybe he's got any clue.
>From gcc-bugs-return-582993-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 15:29:11 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 15:29:00 -0000
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--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Maxim Egorushkin from comment #0)
> g function assembly contains a superflous test instruction. It should not
> generate that instruction, since sub instruction already sets all the
> required flags. I first discovered this issue in gcc-4.9.2 and it is still
> there in gcc-7.2.0.
SUBL also sets overflow flat (OF). JLE in fact jumps when (ZF=1 or SF≠OF), so
assuming OF is always cleared is waaay to dangerous.
As a matter of fact, flag-setting cmp/sub/add patterns can be changed to
operate in CCNOmode instead of CCGOCmode when strict signed overflow rules are
in effect (in C/C++ signed overflow is undefined, so we CAN assume signed
overflow never happens and consequently flag OF is never set), but it would be
major PITA on x86 architecture, where plus and minus operations on signed
integers always overflow "as expected".
(BTW: I did implement the above idea, but compiler failed bootstrap comparison
check. I'm surprised clang was brave enough to implement this dangerous
optimization.)
>From gcc-bugs-return-582994-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 16:03:55 2017
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Subject: [Bug tree-optimization/71026] Missing division optimizations
Date: Fri, 24 Nov 2017 16:03:00 -0000
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--- Comment #10 from Wilco <wilco at gcc dot gnu.org> ---
Author: wilco
Date: Fri Nov 24 16:03:13 2017
New Revision: 255141
URL: https://gcc.gnu.org/viewcvs?rev=255141&root=gcc&view=rev
Log:
Factor out division by squares
This patch implements the some of the division optimizations discussed in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71026.
The division reciprocal optimization now handles divisions by squares:
x / (y * y) -> x * (1 / y) * (1 / y)
This requires at least one more division by y before it triggers - the
3 divisions of (1/ y) are then CSEd into a single division. Overall
this changes 1 division into 1 multiply, which is generally much faster.
2017-11-24 Jackson Woodruff <jackson.woodruff@arm.com>
gcc/
PR tree-optimization/71026
* tree-ssa-math-opts (is_division_by_square, is_square_of): New.
(insert_reciprocals): Change to insert reciprocals before a division
by a square and to insert the square of a reciprocal.
(execute_cse_reciprocals_1): Change to consider division by a square.
(register_division_in): Add importance parameter.
testsuite/
PR tree-optimization/71026
* gfortran.dg/extract_recip_1.f: New test.
* gcc.dg/extract_recip_3.c: New test.
* gcc.dg/extract_recip_4.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/extract_recip_3.c
trunk/gcc/testsuite/gcc.dg/extract_recip_4.c
trunk/gcc/testsuite/gfortran.dg/extract_recip_1.f
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-math-opts.c
>From gcc-bugs-return-582995-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 16:23:32 2017
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Subject: [Bug tree-optimization/32306] [6/7/8 Regression] redundant && || not eliminated
Date: Fri, 24 Nov 2017 16:23:00 -0000
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--- Comment #36 from Jeffrey A. Law <law at redhat dot com> ---
Just a couple notes. I'm not currently looking at this, but this is probably
the best bug to track thoughts around how to try and capture secondary effects
of jump threading without re-running all of DOM.
-- Taken from another BZ so that it doesn't get lost --
I looked at ways to introduce iteration without the full DOM pass years ago.
It was pretty obvious that the most interesting things happened as a result of
exposing degenerate PHIs. But I wasn't ever able to make a leap from that to a
low overhead iterating jump threader. What did come out of it was the phi-only
cprop pass which propagates away the degenerate PHIs.
--
And today's thought. In addition to degenerate PHIs the other key property
which indicates an exposed secondary opportunity is a reduction in the number
of preds for a block. Particularly when we can drop from N to 1 pred.
ssa--dom-simplify-1 is a good example, particularly if one disables the VRP
threader. Prior to DOM we'll see:
;; basic block 2, loop depth 0, count 1073741825 (estimated locally), maybe
hot
;; prev block 0, next block 3, flags: (NEW, REACHABLE, VISITED)
;; pred: ENTRY [always] count:1073741826 (estimated locally)
(FALLTHRU,EXECUTABLE)
if (x_3(D) > 3)
goto <bb 3>; [33.00%]
else
goto <bb 4>; [67.00%]
;; succ: 3 [33.0% (guessed)] count:354334800 (estimated locally)
(TRUE_VALUE,EXECUTABLE)
;; 4 [67.0% (guessed)] count:719407025 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
;; basic block 3, loop depth 0, count 354334802 (estimated locally), maybe
hot
;; prev block 2, next block 4, flags: (NEW, REACHABLE, VISITED)
;; pred: 2 [33.0% (guessed)] count:354334800 (estimated locally)
(TRUE_VALUE,EXECUTABLE)
frob (1);
;; succ: 4 [always (guessed)] count:354334802 (estimated locally)
(FALLTHRU,EXECUTABLE)
;; basic block 4, loop depth 0, count 1073741825 (estimated locally), maybe
hot
;; prev block 3, next block 5, flags: (NEW, REACHABLE, VISITED)
;; pred: 3 [always (guessed)] count:354334802 (estimated locally)
(FALLTHRU,EXECUTABLE)
;; 2 [67.0% (guessed)] count:719407025 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
if (x_3(D) > 2)
goto <bb 5>; [33.00%]
else
goto <bb 6>; [67.00%]
;; succ: 5 [33.0% (guessed)] count:354334800 (estimated locally)
(TRUE_VALUE,EXECUTABLE)
;; 6 [67.0% (guessed)] count:719407025 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
;; basic block 5, loop depth 0, count 354334802 (estimated locally), maybe
hot
;; prev block 4, next block 6, flags: (NEW, REACHABLE, VISITED)
;; pred: 4 [33.0% (guessed)] count:354334800 (estimated locally)
(TRUE_VALUE,EXECUTABLE)
frob (x_3(D));
;; succ: 6 [always (guessed)] count:354334802 (estimated locally)
(FALLTHRU,EXECUTABLE)
;; basic block 6, loop depth 0, count 1073741825 (estimated locally), maybe
hot
;; prev block 5, next block 1, flags: (NEW, REACHABLE, VISITED)
;; pred: 4 [67.0% (guessed)] count:719407025 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
;; 5 [always (guessed)] count:354334802 (estimated locally)
(FALLTHRU,EXECUTABLE)
return;
;; succ: EXIT [always (guessed)] count:1073741825 (estimated locally)
}
DOM is going to discover the 3->4->5 jump thread easily. But there are no
PHIs in BB4 that would trigger any kind of reanalysis. But the # preds for BB4
drops from 2 to 1. This is important as the remaining path into BB4 can be
further optimized after we realize the 3->4->5 jump thread.
It feels as if when we discover a degenerate PHI or the incoming preds drops to
1, then we ought to start a re-analysis. The blocks involved would start at
the idom of the affected block, covering the dominance tree and the PHI nodes
as the dominance frontier.
I thought I explored that idom/dominance tree/dominance frontier idea years ago
and likely dismissed it as incomplete (consider how scrambled the dominance
tree can get after threading). But while I could certainly conjure up
scenarios where it's incomplete, it might be "good enough" to catch the
secondary opportunities without a fully iterating DOM.
--
Of course I'm also very interested to evaluate if any of that is necessary with
Aldy's recent work on the backwards threader.
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From: "neil.n.carlson at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83146] New: ICE on SELECT CASE statement with associate name
Date: Fri, 24 Nov 2017 16:27:00 -0000
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Bug ID: 83146
Summary: ICE on SELECT CASE statement with associate name
Product: gcc
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The current 8.0 trunk gives an ICE on the following example. 6.4.1 also gives
an ICE.
type foo
integer n
end type
type bar
type(foo) array(2)
end type
type(bar) b
associate (n_array => b%array%n)
select case (n_array(1))
case default
end select
end associate
end
Here's the traceback
$ gfortran -c gfortran-20171124.f90
gfortran-20171124.f90:9:0:
select case (n_array(1))
internal compiler error: in gfc_get_element_type, at fortran/trans-types.c:1231
0x5a5da8 gfc_get_element_type(tree_node*)
../../gcc/fortran/trans-types.c:1231
0x95d247 trans_associate_var
../../gcc/fortran/trans-stmt.c:1632
0x95d247 gfc_trans_block_construct(gfc_code*)
../../gcc/fortran/trans-stmt.c:1890
0x8e48c7 trans_code
../../gcc/fortran/trans.c:1924
0x90e7a8 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6437
0x89d036 translate_all_program_units
../../gcc/fortran/parse.c:6091
0x89d036 gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x8e0eaf gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-582997-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 16:31:15 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 16:31:00 -0000
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--- Comment #2 from Maxim Egorushkin <maxim.yegorushkin at gmail dot com> ---
(In reply to Uroš Bizjak from comment #1)
> (In reply to Maxim Egorushkin from comment #0)
> > g function assembly contains a superflous test instruction. It should not
> > generate that instruction, since sub instruction already sets all the
> > required flags. I first discovered this issue in gcc-4.9.2 and it is still
> > there in gcc-7.2.0.
>
> SUBL also sets overflow flat (OF). JLE in fact jumps when (ZF=1 or SF≠OF),
> so assuming OF is always cleared is waaay to dangerous.
>
> As a matter of fact, flag-setting cmp/sub/add patterns can be changed to
> operate in CCNOmode instead of CCGOCmode when strict signed overflow rules
> are in effect (in C/C++ signed overflow is undefined, so we CAN assume
> signed overflow never happens and consequently flag OF is never set), but it
> would be major PITA on x86 architecture, where plus and minus operations on
> signed integers always overflow "as expected".
>
> (BTW: I did implement the above idea, but compiler failed bootstrap
> comparison check. I'm surprised clang was brave enough to implement this
> dangerous optimization.)
Could you provide an example where that "dangerous optimization" would break
well-formed code please?
>From gcc-bugs-return-582998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 16:43:20 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 16:43:00 -0000
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Maxim Egorushkin from comment #2)
> Could you provide an example where that "dangerous optimization" would break
> well-formed code please?
--cut here--
#include <stdio.h>
void positive (int a) { printf ("positive: %i\n", a); }
void nonpositive (int a) { printf ("nonpositive: %i\n", a); }
void
__attribute__((noinline))
g (int a, int b)
{
int diff = a - b;
if (diff > 0)
return positive (diff);
else
return nonpositive (diff);
}
int
main ()
{
int a = -0x80000000;
int b = 0x01;
g (a, b);
return 0;
}
--cut here--
$ gcc -O2 ttt.c
$ ./a.out
positive: 2147483647
$ gcc -O0 ttt.c
$ ./a.out
positive: 2147483647
$ clang -O2 ttt.c
$ ./a.out
nonpositive: 2147483647 <--------- HERE!
$ clang -O0 ttt.c
$ ./a.out
positive: 2147483647
>From gcc-bugs-return-582999-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 16:47:11 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 16:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83133
--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
$ gcc --version
gcc (GCC) 7.2.1 20170915 (Red Hat 7.2.1-2)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ clang --version
clang version 4.0.1 (tags/RELEASE_401/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 16:51:00 -0000
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--- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
Both 32-bit and 64-bit ABIs make the values of flags in EFLAGS (other than
DF) undefined on function entry and return. Thus, a function can never
assume anything about the value of OF unless it has executed an
instruction known to set/clear it and has not called any other functions
since then.
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From: "neil.n.carlson at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83146] ICE on SELECT CASE statement with associate name
Date: Fri, 24 Nov 2017 16:59:00 -0000
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--- Comment #1 from Neil Carlson <neil.n.carlson at gmail dot com> ---
I thought that assigning the select case expression to a temporary integer and
using that variable in the select case statement would be a workaround, but no.
You can put anything unrelated to the associate name in the select case and you
still get an ICE. It seems the the associate block itself is the problem.
Here's the tweaked example
type foo
integer n
end type
type bar
type(foo) array(2)
end type
type(bar) b
integer :: m=0
associate (n_array => b%array%n)
select case (m)
case default
end select
end associate
end
>From gcc-bugs-return-583003-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:01:33 2017
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Subject: [Bug rtl-optimization/82621] [6/7 Regression] wrong code with -Og -fgcse -fweb
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--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Fri Nov 24 17:00:57 2017
New Revision: 255142
URL: https://gcc.gnu.org/viewcvs?rev=255142&root=gcc&view=rev
Log:
combine: Don't split insns if half is unused (PR82621)
If we have a PARALLEL of two SETs, and one half is unused, we currently
happily split that into two instructions (albeit the unused one is
useless). Worse, as PR82621 shows, combine will happily merge this
insn into I3 even if some intervening insn sets the same register
again, which is wrong.
This fixes it by not splitting PARALLELs with REG_UNUSED notes. It
all is handled fine by combine in that case; just the "single set
that is unused" case isn't handled properly.
This also results in better code: combine will now actually throw
away the unused SET. (It still won't do that in an I3).
PR rtl-optimization/82621
* combine.c (try_combine): Do not split PARALLELs of two SETs if the
dest of one of those SETs is unused.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/combine.c
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From: "maxim.yegorushkin at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 17:01:00 -0000
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--- Comment #6 from Maxim Egorushkin <maxim.yegorushkin at gmail dot com> ---
(In reply to Uroš Bizjak from comment #3)
> (In reply to Maxim Egorushkin from comment #2)
>
> > Could you provide an example where that "dangerous optimization" would break
> > well-formed code please?
>
> --cut here--
> #include <stdio.h>
>
> void positive (int a) { printf ("positive: %i\n", a); }
> void nonpositive (int a) { printf ("nonpositive: %i\n", a); }
>
> void
> __attribute__((noinline))
> g (int a, int b)
> {
> int diff = a - b;
>
> if (diff > 0)
> return positive (diff);
> else
> return nonpositive (diff);
> }
>
> int
> main ()
> {
> int a = -0x80000000;
> int b = 0x01;
>
> g (a, b);
>
> return 0;
> }
> --cut here--
>
> $ gcc -O2 ttt.c
> $ ./a.out
> positive: 2147483647
>
> $ gcc -O0 ttt.c
> $ ./a.out
> positive: 2147483647
>
> $ clang -O2 ttt.c
> $ ./a.out
> nonpositive: 2147483647 <--------- HERE!
>
> $ clang -O0 ttt.c
> $ ./a.out
> positive: 2147483647
This code underflows a signed integer, which is undefined behaviour, if I am
not mistaken. So, this would not be a valid example, would it?
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Subject: [Bug rtl-optimization/82621] [6/7 Regression] wrong code with -Og -fgcse -fweb
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--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Fri Nov 24 17:03:04 2017
New Revision: 255143
URL: https://gcc.gnu.org/viewcvs?rev=255143&root=gcc&view=rev
Log:
combine: Don't split insns if half is unused (PR82621)
If we have a PARALLEL of two SETs, and one half is unused, we currently
happily split that into two instructions (albeit the unused one is
useless). Worse, as PR82621 shows, combine will happily merge this
insn into I3 even if some intervening insn sets the same register
again, which is wrong.
This fixes it by not splitting PARALLELs with REG_UNUSED notes. It
all is handled fine by combine in that case; just the "single set
that is unused" case isn't handled properly.
This also results in better code: combine will now actually throw
away the unused SET. (It still won't do that in an I3).
PR rtl-optimization/82621
* combine.c (try_combine): Do not split PARALLELs of two SETs if the
dest of one of those SETs is unused.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/combine.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/82621] [6/7 Regression] wrong code with -Og -fgcse -fweb
Date: Fri, 24 Nov 2017 17:04:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed on all open branches.
>From gcc-bugs-return-583006-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:05:54 2017
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 17:05:00 -0000
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--- Comment #7 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Fri, 24 Nov 2017, maxim.yegorushkin at gmail dot com wrote:
> This code underflows a signed integer, which is undefined behaviour, if I am
> not mistaken. So, this would not be a valid example, would it?
It's valid to call a function in another file compiled with another
compiler that follows the ABI, or compiled with -fwrapv, or not written in
C at all.
The ABI means you can't assume anything about what a called function does
with OF, unless you know the function is called from the same translation
unit and know that it has been compiled to do particular things with OF,
and can't assume anything about the value of OF on entry, unless it's a
static function and you know about what all the callers do.
>From gcc-bugs-return-583007-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:06:18 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
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--- Comment #8 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to joseph@codesourcery.com from comment #5)
> Both 32-bit and 64-bit ABIs make the values of flags in EFLAGS (other than
> DF) undefined on function entry and return. Thus, a function can never
> assume anything about the value of OF unless it has executed an
> instruction known to set/clear it and has not called any other functions
> since then.
In the testcase, there is nothing that violates ABI. It all happens in "g" that
passes calculated result to a function. Selected function depends on flags,
calculated from the subtraction, and wrong function gets selected when overflow
happens.
>From gcc-bugs-return-583008-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:07:58 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83146] ICE on SELECT CASE statement with associate name
Date: Fri, 24 Nov 2017 17:07:00 -0000
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--- Comment #2 from Neil Carlson <neil.n.carlson at gmail dot com> ---
Turns out you don't need anything at all in the associate block to get an ICE:
type foo
integer n
end type
type bar
type(foo) array(2)
end type
type(bar) b
associate (n_array => b%array%n)
end associate
end
>From gcc-bugs-return-583009-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:14:11 2017
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Subject: [Bug debug/81307] [8 regression] g++.dg/debug/debug9.C -gstabs FAILs
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42712
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42712&action=edit
gcc8-pr81307.patch
Untested fix.
>From gcc-bugs-return-583010-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:20:20 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
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--- Comment #9 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Maxim Egorushkin from comment #6)
> This code underflows a signed integer, which is undefined behaviour, if I am
> not mistaken. So, this would not be a valid example, would it?
An example of "dangerous optimization" from Comment #2 was requested. The
optimization is valid, but this code happens as well. As shown in the example,
the program, compiled with clang declared 2147483647 as nonpositive when
compiled with -O2 and as positive when compiled with -O0.
We can sweep the issue under the carpet as "undefined behaviour", but I don't
want to jeopardize the robustness of an industrial-strength compiler with the
implementation of this relatively minor optimization.
>From gcc-bugs-return-583011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:20:30 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 17:20:00 -0000
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--- Comment #10 from Maxim Egorushkin <maxim.yegorushkin at gmail dot com> ---
(In reply to Uroš Bizjak from comment #8)
> (In reply to joseph@codesourcery.com from comment #5)
> > Both 32-bit and 64-bit ABIs make the values of flags in EFLAGS (other than
> > DF) undefined on function entry and return. Thus, a function can never
> > assume anything about the value of OF unless it has executed an
> > instruction known to set/clear it and has not called any other functions
> > since then.
>
> In the testcase, there is nothing that violates ABI.
Not sure why ABI got involved here.
> It all happens in "g"
> that passes calculated result to a function. Selected function depends on
> flags, calculated from the subtraction, and wrong function gets selected
> when overflow happens.
The underflow happens as a result of that subtraction. That underflow leads to
UB. In the case of UB, both gcc and clang behaviours are valid. The clang
behaviour is one instruction cheaper though.
>From gcc-bugs-return-583012-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:24:37 2017
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Subject: [Bug rtl-optimization/81288] [6/7/8 Regression] ICE on 32-bit BE powerpc targets -w -misel -O2 (-O3, -Ofast, -Os)
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>From gcc-bugs-return-583013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:25:20 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
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--- Comment #11 from Maxim Egorushkin <maxim.yegorushkin at gmail dot com> ---
(In reply to joseph@codesourcery.com from comment #7)
> On Fri, 24 Nov 2017, maxim.yegorushkin at gmail dot com wrote:
>
> > This code underflows a signed integer, which is undefined behaviour, if I am
> > not mistaken. So, this would not be a valid example, would it?
>
> It's valid to call a function in another file compiled with another
> compiler that follows the ABI, or compiled with -fwrapv, or not written in
> C at all.
That amounts to saying that the extra test instruction should only be emitted
when compiling with -fwrapv. Is that right?
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
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--- Comment #12 from Maxim Egorushkin <maxim.yegorushkin at gmail dot com> ---
(In reply to joseph@codesourcery.com from comment #7)
> On Fri, 24 Nov 2017, maxim.yegorushkin at gmail dot com wrote:
>
> > This code underflows a signed integer, which is undefined behaviour, if I am
> > not mistaken. So, this would not be a valid example, would it?
>
> It's valid to call a function in another file compiled with another
> compiler that follows the ABI, or compiled with -fwrapv, or not written in
> C at all.
That amounts to saying that the extra test instruction should only be emitted
when compiling with -fwrapv. Is that right?
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
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--- Comment #13 from Maxim Egorushkin <maxim.yegorushkin at gmail dot com> ---
(In reply to Uroš Bizjak from comment #9)
> (In reply to Maxim Egorushkin from comment #6)
>
> > This code underflows a signed integer, which is undefined behaviour, if I am
> > not mistaken. So, this would not be a valid example, would it?
>
> An example of "dangerous optimization" from Comment #2 was requested. The
> optimization is valid, but this code happens as well. As shown in the
> example, the program, compiled with clang declared 2147483647 as nonpositive
> when compiled with -O2 and as positive when compiled with -O0.
>
> We can sweep the issue under the carpet as "undefined behaviour", but I
> don't want to jeopardize the robustness of an industrial-strength compiler
> with the implementation of this relatively minor optimization.
It looks like -fstrict-overflow flag is there to enable exactly this kind of
optimization.
>From gcc-bugs-return-583016-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:32:02 2017
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Subject: [Bug fortran/49213] [OOP] gfortran rejects structure constructor expression
Date: Fri, 24 Nov 2017 17:32:00 -0000
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--- Comment #24 from Neil Carlson <neil.n.carlson at gmail dot com> ---
Ping. This bug has been around for over 6 years now.
>From gcc-bugs-return-583017-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:34:40 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 17:34:00 -0000
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--- Comment #14 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Maxim Egorushkin from comment #13)
> It looks like -fstrict-overflow flag is there to enable exactly this kind of
> optimization.
Yes, and it is set by default. Meaning that ALL code has to be reviewed for
undefined overflows just because of this optimization.
>From gcc-bugs-return-583018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:41:34 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 17:41:00 -0000
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--- Comment #15 from Marc Glisse <glisse at gcc dot gnu.org> ---
Gcc's RTL internal representation sees the same thing for your code and for
int diff = (unsigned)a - (unsigned)b;
llvm represents both differently and generates different code for the two.
>From gcc-bugs-return-583019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:54:17 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 17:54:00 -0000
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--- Comment #16 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Fri, 24 Nov 2017, maxim.yegorushkin at gmail dot com wrote:
> > It's valid to call a function in another file compiled with another
> > compiler that follows the ABI, or compiled with -fwrapv, or not written in
> > C at all.
>
> That amounts to saying that the extra test instruction should only be emitted
> when compiling with -fwrapv. Is that right?
No. It's valid for a function compiled without -fwrapv to call one
compiled with -fwrapv. After such a call, the value of OF is unknown.
That is, there is no need for any undefined behavior for OF to be set
after a function call, and there is no need for any undefined behavior for
OF to be set on function entry, and a function cannot know whether its
caller or callees were compiled in ways that allow them to set OF. It's
*also* perfectly valid for code with no undefined behavior and no -fwrapv
to set OF if an instruction that happens to set OF happens to be the most
convenient way of implementing that code's semantics.
>From gcc-bugs-return-583020-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 17:55:25 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 17:55:00 -0000
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--- Comment #17 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Marc Glisse from comment #15)
> Gcc's RTL internal representation sees the same thing for your code and for
>
> int diff = (unsigned)a - (unsigned)b;
>
> llvm represents both differently and generates different code for the two.
GCC represents unsigned comparison with LTU and signed with LT. This
optimization can be implemented by changing condition of *sub<mode>_2 pattern
from:
ix86_match_ccmode (insn, CCGOCmode)
to
ix86_match_ccmode (insn, flag_wrapv ? CCGOCmode : CCNOmode)
>From gcc-bugs-return-583021-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 18:02:32 2017
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
Date: Fri, 24 Nov 2017 18:02:00 -0000
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--- Comment #18 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Fri, 24 Nov 2017, ubizjak at gmail dot com wrote:
> In the testcase, there is nothing that violates ABI. It all happens in "g" that
> passes calculated result to a function. Selected function depends on flags,
> calculated from the subtraction, and wrong function gets selected when overflow
> happens.
Thanks for the explanation. As long as the transformation is local
(relying on an OF value that definitely comes from a particular
instruction that would clear it in the absence of overflow, not relying on
other computations not having overflowed), using it should be valid,
provided you take into account that RTL has no undefined behavior on
signed overflow (flag_wrapv only affects GIMPLE semantics, not RTL
semantics), so the flag can only be used when instruction semantics for
when it is set are consistent with the RTL semantics for the comparison.
What's not valid is using sticky overflow flags such as exist in some
instruction sets.
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Subject: [Bug rtl-optimization/83147] New: LRA inheritance undo on multiple sets problem
Date: Fri, 24 Nov 2017 18:08:00 -0000
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Bug ID: 83147
Summary: LRA inheritance undo on multiple sets problem
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
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Created attachment 42713
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42713&action=edit
Autoreduced testcase
Compiling the attached testcase with:
gcc -march=z196 -m64 -mzarch -O2 -o t.s t.cc
produces the following sequence:
...
stmg %r2,%r3,160(%r15)
ltg %r2,184(%r15) <--- read from uninitialized memory
lghi %r3,0
ltg %r1,168(%r15)
lghi %r1,1
locgre %r2,%r1
...
This currently makes bootstrap with "--with-arch=z196" fail on S/390.
The ltg instruction is a load and test being a parallel of a compare and a set
using the same source operand (272r.ira):
(insn 122 62 48 6 (parallel [
(set (reg:CCZ 33 %cc)
(compare:CCZ (subreg:DI (reg:TI 100 [ width+-8 ]) 8)
(const_int 0 [0])))
(set (reg:DI 118 [ nbwc ])
(subreg:DI (reg:TI 100 [ width+-8 ]) 8))
]) 1213 {*tstdi_extimm}
(expr_list:REG_UNUSED (reg:CCZ 33 %cc)
(nil)))
LRA generates an inheritance reload replacing both occurrences of the source
operand r100 with r132 (273r.reload):
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Creating newreg=132 from oldreg=100, assigning class GENERAL_REGS to
inheritance r132
Original reg change 100->132 (bb6):
122: {%cc:CCZ=cmp(r132:TI#8,0);r118:DI=r132:TI#8;}
REG_UNUSED %cc:CCZ
Add inheritance<-original before:
162: r132:TI=r100:TI
Inheritance reuse change 100->132 (bb6):
158: r129:DI=r132:TI#8
REG_DEAD r132:TI
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
And another one for r100 stacking on top of the first:
163: r133=r100
162: r132=r133
122: use r132
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Creating newreg=133 from oldreg=100, assigning class GENERAL_REGS to
inheritance r133
Original reg change 100->133 (bb5):
41: r78:DI=r133:TI#8
Add inheritance<-original before:
163: r133:TI=r100:TI
Inheritance reuse change 100->133 (bb6):
162: r132:TI=r133:TI
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
The inheritance undo code then tries to replace r132 in insn 122 with r133.
Unfortunately it only replaces one of the source operands.
The reason is that the target of the first part of the parallel (the cmp) is
REG_UNUSED and hence single_set ignores it and returns just the second part of
the insn. The code then operates on the source operand return by single_set
(lra-constraint.c:6698):
if (GET_CODE (SET_SRC (set)) == SUBREG)
SUBREG_REG (SET_SRC (set)) = SET_SRC (prev_set);
else
SET_SRC (set) = SET_SRC (prev_set);
The replacement perhaps needs to be done recursively to get all the sources?
********** Undoing inheritance #2: **********
Inherit 3 out of 4 (75.00%)
Insn after restoring regs:
158: r129:DI=r100:TI#8
REG_DEAD r100:TI
Change reload insn:
122: {%cc:CCZ=cmp(r132:TI#8,0);r118:DI=r133:TI#8;} <---- 2 different
sources
REG_UNUSED %cc:CCZ
Insn after restoring regs:
162: r100:TI=r133:TI
REG_DEAD r133:TI
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Subject: [Bug rtl-optimization/83147] LRA inheritance undo on multiple sets problem
Date: Fri, 24 Nov 2017 18:10:00 -0000
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--- Comment #1 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Created attachment 42714
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42714&action=edit
Experimental patch
This patch appears to fix the problem for me. However, it isn't really tested
yet.
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Subject: [Bug rtl-optimization/83147] LRA inheritance undo on multiple sets problem
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Andreas Krebbel <krebbel at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target| |s390x-ibm-linux
Priority|P3 |P2
Host| |s390x-ibm-linux
Build| |s390x-ibm-linux
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83146] [6/7/8 Regression] ICE on SELECT CASE statement with associate name
Date: Fri, 24 Nov 2017 18:22:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |4.8.5
Keywords| |ice-on-valid-code
Last reconfirmed| |2017-11-24
Ever confirmed|0 |1
Summary|ICE on SELECT CASE |[6/7/8 Regression] ICE on
|statement with associate |SELECT CASE statement with
|name |associate name
Target Milestone|--- |6.5
Known to fail| |4.9.3, 5.5.0, 6.4.0, 7.2.0,
| |8.0
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Regression occurring between revisions r205210 (2013-11-21, OK) and r207996
(2014-02-21, ICE).
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Subject: [Bug fortran/83135] Routines in submodules treat protected variables from other modules as public
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-24
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 6.4 up to trunk (8.0).
>From gcc-bugs-return-583027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 18:37:14 2017
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Subject: [Bug fortran/49213] [OOP] gfortran rejects structure constructor expression
Date: Fri, 24 Nov 2017 18:37:00 -0000
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--- Comment #25 from Neil Carlson <neil.n.carlson at gmail dot com> ---
Here's another example similar to those above but even simpler IMHO and
involving a CLASS(*) pointer component
type box
class(*), pointer :: uptr => null()
end type
integer, target :: n
call sub(box(n))
contains
subroutine sub(b)
type(box), intent(in) :: b
end subroutine
end
call sub(box(n))
1
Error: Can't convert INTEGER(4) to CLASS(*) at (1)
This should work in F2003. GFortran seems to be fundamentally broken when it
comes to derived types with polymorphic pointer components and intrinsic
structure constructors.
>From gcc-bugs-return-583028-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 18:52:12 2017
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Subject: [Bug c/81875] omp for loop optimized away
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug target/83133] Superflous x86 test instructions in generated assembly.
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--- Comment #19 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #17)
> (In reply to Marc Glisse from comment #15)
> > Gcc's RTL internal representation sees the same thing for your code and for
> >
> > int diff = (unsigned)a - (unsigned)b;
> >
> > llvm represents both differently and generates different code for the two.
>
> GCC represents unsigned comparison with LTU and signed with LT.
Above I only used unsigned for the subtraction, not for the comparison. This
was a way to explain to Maxim that in RTL, we have lost the information that an
overflow would be undefined behavior. Expansion is currently the last chance we
get to use the GIMPLE information about overflow. Otherwise, we would need to
find a way in RTL to represent this overflow behavior (say that it sets OF to
false, but we are already using a parallel to say it sets CCGOC so I don't know
how we would spell that).
By the way, writing a<b or a>b instead of diff<0 or diff>0 doesn't help, it
actually hurts gcc. I thought we had a pass to merge adjacent subtraction and
comparison of the same numbers...
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From: "neil.n.carlson at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83148] New: [7.2 regression] ICE: crash_signal from toplev.c:325
Date: Fri, 24 Nov 2017 20:06:00 -0000
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Bug ID: 83148
Summary: [7.2 regression] ICE: crash_signal from toplev.c:325
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Target Milestone: ---
The following example gives an ICE with the current 8.0 trunk, but not with
7.2.1 or 6.4.1.
module fhypre
use iso_c_binding, only: c_ptr, c_null_ptr
use iso_c_binding, only: hypre_obj => c_ptr, hypre_null_obj => c_null_ptr
private
public :: hypre_obj, hypre_null_obj
end module
module hypre_hybrid_type
use fhypre
type hypre_hybrid
type(hypre_obj) :: solver = hypre_null_obj
end type hypre_hybrid
end module
Here's the traceback
$ gfortran -c gfortran-20171124c.f90
f951: internal compiler error: Segmentation fault
0xd6b98f crash_signal
../../gcc/toplev.c:325
0xfb33fd tree_class_check(tree_node const*, tree_code_class, char const*, int,
char const*)
../../gcc/tree.h:3480
0xfb33fd wi::from_mpz(tree_node const*, __mpz_struct*, bool)
../../gcc/wide-int.cc:244
0x900284 gfc_conv_mpz_to_tree(__mpz_struct*, int)
../../gcc/fortran/trans-const.c:205
0x9008bf gfc_conv_constant(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-const.c:413
0x922b91 gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
../../gcc/fortran/trans-expr.c:6833
0x9231ad gfc_conv_structure(gfc_se*, gfc_expr*, int)
../../gcc/fortran/trans-expr.c:7748
0x922cdf gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
../../gcc/fortran/trans-expr.c:6883
0x90a78b gfc_get_symbol_decl(gfc_symbol*)
../../gcc/fortran/trans-decl.c:1819
0x90d340 gfc_create_module_variable
../../gcc/fortran/trans-decl.c:4943
0x8cf472 do_traverse_symtree
../../gcc/fortran/symbol.c:4157
0x910193 gfc_generate_module_vars(gfc_namespace*)
../../gcc/fortran/trans-decl.c:5415
0x8e88fc gfc_generate_module_code(gfc_namespace*)
../../gcc/fortran/trans.c:2180
0x89cf7b translate_all_program_units
../../gcc/fortran/parse.c:6078
0x89cf7b gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x8e0eaf gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-583031-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 20:41:57 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83100] [8 Regression] powerpc: internal compiler error: in get_variable_section, at varasm.c:1150 with -fdata-sections
Date: Fri, 24 Nov 2017 20:41:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |law at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That change looks wrong to me.
Previously the variable was common and thus if you e.g. mixed it with some
other TU that has const int a = 5; then you could link the two together and the
value of the variable would be 5. But with the changes, that is no longer the
case (if it doesn't ICE), the variable is put into .rodata section.
>From gcc-bugs-return-583032-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 20:54:41 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83100] [8 Regression] powerpc: internal compiler error: in get_variable_section, at varasm.c:1150 with -fdata-sections
Date: Fri, 24 Nov 2017 20:54:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'll test:
--- gcc/varasm.c.jj 2017-11-21 20:23:02.000000000 +0100
+++ gcc/varasm.c 2017-11-24 21:43:55.616951823 +0100
@@ -986,9 +986,9 @@ decode_reg_name (const char *name)
bool
bss_initializer_p (const_tree decl)
{
- /* Do not put constants into the .bss section, they belong in a readonly
- section. */
- return (!TREE_READONLY (decl)
+ /* Do not put non-common constants into the .bss section, they belong in
+ a readonly section. */
+ return ((!TREE_READONLY (decl) || DECL_COMMON (decl))
&& (DECL_INITIAL (decl) == NULL
/* In LTO we have no errors in program; error_mark_node is used
to mark offlined constructors. */
after cooking up a testcase.
>From gcc-bugs-return-583033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 24 21:05:43 2017
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Subject: [Bug target/83100] [8 Regression] powerpc: internal compiler error: in get_variable_section, at varasm.c:1150 with -fdata-sections
Date: Fri, 24 Nov 2017 21:05:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42715
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42715&action=edit
gcc8-pr83100.patch
Complete untested patch, will bootstrap/regtest it now on x86_64/i686 and
powerpc64{,le}-linux.
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From: "neil.n.carlson at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/79929] [7/8 Regression] Bogus Warning: '__builtin_memset': specified size 4294967291 exceeds maximum object size 2147483647
Date: Fri, 24 Nov 2017 21:14:00 -0000
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Neil Carlson <neil.n.carlson at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #22 from Neil Carlson <neil.n.carlson at gmail dot com> ---
I'm seeing these warning messages with essentially the same test case as
comment 0 using 8.0 (20171123) at -O1 and higher.
Same warning messages using 7.2.1 but only at -O2 and higher.
Even if these are bogus (I hope), they really need to be gotten rid of.
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Subject: [Bug target/83100] [8 Regression] powerpc: internal compiler error: in get_variable_section, at varasm.c:1150 with -fdata-sections
Date: Fri, 24 Nov 2017 21:22:00 -0000
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--- Comment #7 from James Clarke <jrtc27 at jrtc27 dot com> ---
(In reply to Jakub Jelinek from comment #4)
> That change looks wrong to me.
> Previously the variable was common and thus if you e.g. mixed it with some
> other TU that has const int a = 5; then you could link the two together and
> the value of the variable would be 5. But with the changes, that is no
> longer the case (if it doesn't ICE), the variable is put into .rodata
> section.
Yes, and in fact I saw this behaviour and got pointed at that commit about a
week ago, as I was seeing duplicate symbol errors when linking another piece of
software. As it happens, the declaration in the header in that case should have
been extern, but the change in GCC's behaviour still made me uneasy.
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Subject: [Bug fortran/81304] [6/7/8 Regression] Bogus warning with -Wsurprising and -fopenmp: Type specified for intrinsic function 'min' / 'max'
Date: Fri, 24 Nov 2017 21:40:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Nov 24 21:40:21 2017
New Revision: 255144
URL: https://gcc.gnu.org/viewcvs?rev=255144&root=gcc&view=rev
Log:
PR fortran/81304
* trans-openmp.c (gfc_trans_omp_array_reduction_or_udr): Set
attr.implicit_type in intrinsic_sym to avoid undesirable warning.
* testsuite/libgomp.fortran/pr81304.f90: New test.
Added:
trunk/libgomp/testsuite/libgomp.fortran/pr81304.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-openmp.c
trunk/libgomp/ChangeLog
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Subject: [Bug gcov-profile/79392] MinGW-w64 backend: programs built with --coverage do not create *.gcda files
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Giulio Paci <giuliopaci at gmail dot com> changed:
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--- Comment #3 from Giulio Paci <giuliopaci at gmail dot com> ---
I experienced the same bug today on Debian buster (current testing), with gcc
6.3.0.
The steps to reproduce are the same as reported by Boris.
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/79929] [7/8 Regression] Bogus Warning: '__builtin_memset': specified size 4294967291 exceeds maximum object size 2147483647
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--- Comment #23 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Harald Anlauf from comment #3)
> subroutine gfcbug138 (yerrmsg)
> character(kind=1,len=*) :: yerrmsg
> yerrmsg = 1_"bug: " // yerrmsg
> end subroutine gfcbug138
[...]
> gfcbug138 (character(kind=1)[1:_yerrmsg] & restrict yerrmsg, integer(kind=4)
> _yerrmsg)
I don't know anything about fortran and this isn't the best way to fix this
bug, but I was wondering if, for this kind of ABI (passing an array with a
pointer and a length IIUC), fortran guarantees that the length is non-negative?
If that's the case, could the front-end convey that information to the
middle-end using set_range_info or some other mechanism?
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Subject: [Bug fortran/83148] [8 regression] ICE: crash_signal from toplev.c:325
Date: Fri, 24 Nov 2017 23:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83148
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-24
Known to work| |6.4.0, 7.2.0
Summary|[7.2 regression] ICE: |[8 regression] ICE:
|crash_signal from |crash_signal from
|toplev.c:325 |toplev.c:325
Ever confirmed|0 |1
Known to fail| |8.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed between revisions r254227 (2017-10-30, OK) and r254498 (2017-11-07,
ICE).
Note that the ICE is gone if I remove the line
use iso_c_binding, only: c_ptr, c_null_ptr
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Subject: [Bug fortran/81304] [6/7 Regression] Bogus warning with -Wsurprising and -fopenmp: Type specified for intrinsic function 'min' / 'max'
Date: Fri, 24 Nov 2017 23:31:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|8.0 |6.5
Summary|[6/7/8 Regression] Bogus |[6/7 Regression] Bogus
|warning with -Wsurprising |warning with -Wsurprising
|and -fopenmp: Type |and -fopenmp: Type
|specified for intrinsic |specified for intrinsic
|function 'min' / 'max' |function 'min' / 'max'
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Subject: [Bug fortran/79929] [7/8 Regression] Bogus Warning: '__builtin_memset': specified size 4294967291 exceeds maximum object size 2147483647
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--- Comment #24 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The following variant does not give the warning
subroutine gfcbug138 (yerrmsg)
character(kind=1,len=*) :: yerrmsg
character(kind=1,len=len(yerrmsg)+5) :: tmp
tmp = 1_"bug: " // yerrmsg
yerrmsg = tmp
end subroutine gfcbug138
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Subject: [Bug fortran/79929] [7/8 Regression] Bogus Warning: '__builtin_memset': specified size 4294967291 exceeds maximum object size 2147483647
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--- Comment #25 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #24)
> The following variant does not give the warning
That's because the code has become obfuscated enough that we don't have the
simplification l-(l+5) anymore (we see l-max(0,l+5) instead) and the argument
to the dead memset call is not seen as a constant. But the dead code is still
there, even if we don't warn.
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Subject: [Bug fortran/79929] [7/8 Regression] Bogus Warning: '__builtin_memset': specified size 4294967291 exceeds maximum object size 2147483647
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--- Comment #26 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Another variant without warning:
subroutine gfcbug138 (yerrmsg)
character(kind=1,len=*) :: yerrmsg
yerrmsg = 1_"bug: " // yerrmsg(1:len(yerrmsg)-5)
end subroutine gfcbug138
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Subject: [Bug fortran/83149] New: ICE on SELECT CASE: crash_signal in toplev.c:325
Date: Sat, 25 Nov 2017 00:30:00 -0000
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Bug ID: 83149
Summary: ICE on SELECT CASE: crash_signal in toplev.c:325
Product: gcc
Version: 8.0
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The current 8.0 trunk gives an ICE on the following example, but only when then
the program units are in two separate files. Works fine with 7.2.1 and 6.4.1.
module mod
character(8) string
contains
function get_string() result(s)
character(len_trim(string)) s
s = string
end function
end module
use mod
string = 'fubar'
select case (get_string())
case default
end select
end
Here's the traceback:
$ gfortran gfortran-20171124e.f90 gfortran-20171124e-main.f90
gfortran-20171124e-main.f90:3:0:
select case (get_string())
internal compiler error: Segmentation fault
0xd6b98f crash_signal
../../gcc/toplev.c:325
0x96852e gfc_sym_type(gfc_symbol*)
../../gcc/fortran/trans-types.c:2207
0x968ab7 gfc_get_function_type(gfc_symbol*)
../../gcc/fortran/trans-types.c:2969
0x907aed gfc_get_extern_function_decl(gfc_symbol*)
../../gcc/fortran/trans-decl.c:2126
0x907ffd gfc_get_extern_function_decl(gfc_symbol*)
../../gcc/fortran/trans-decl.c:1974
0x91bb24 conv_function_val
../../gcc/fortran/trans-expr.c:3722
0x91bb24 gfc_conv_procedure_call(gfc_se*, gfc_symbol*, gfc_actual_arglist*,
gfc_expr*, vec<tree_node*, va_gc, vl_embed>*)
../../gcc/fortran/trans-expr.c:6142
0x91c6fa gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:7852
0x923a6a gfc_conv_expr_reference(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:7952
0x957611 gfc_trans_character_select
../../gcc/fortran/trans-stmt.c:2819
0x95ee1c gfc_trans_select(gfc_code*)
../../gcc/fortran/trans-stmt.c:3158
0x8e48b7 trans_code
../../gcc/fortran/trans.c:1940
0x90e7a8 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6437
0x89d036 translate_all_program_units
../../gcc/fortran/parse.c:6091
0x89d036 gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x8e0eaf gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug fortran/83149] [8 Regression] ICE on SELECT CASE: crash_signal in toplev.c:325
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |6.4.0, 7.2.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2017-11-25
Ever confirmed|0 |1
Summary|ICE on SELECT CASE: |[8 Regression] ICE on
|crash_signal in |SELECT CASE: crash_signal
|toplev.c:325 |in toplev.c:325
Target Milestone|--- |8.0
Known to fail| |8.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Revision r254940 is OK, r255137 gives the ICE.
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Subject: [Bug target/83143] [SH]: Assembler messages: invalid operands (*UND* and .text sections) for `-'
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #6)
> In the asm code I see the following line ...
>
> .L3195:
> .long nir_alu_instr_create@PLT-(.LPCS230+2-.)
>
> ... but the label .LPCS230 does not not exist in the file. So I guess this
> is where the error comes from.
Yeah... Compile with -da and see where that label came from and where it
disappeared?
>From gcc-bugs-return-583047-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 02:43:03 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/83150] New: GCC's internal use of `abort`is unsafe in several ways
Date: Sat, 25 Nov 2017 02:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83150
Bug ID: 83150
Summary: GCC's internal use of `abort`is unsafe in several ways
Product: gcc
Version: 6.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: b.r.longbons at gmail dot com
Target Milestone: ---
1. if the `fancy_abort` redefinition is used, exit() is called (and thus atexit
handlers), violating the assumptions of both plugins and later system headers
(including macros) that expect abort() to prevent further code execution, since
invariants may be broken.
Either using `_exit` or `abort` would fix this (in
`diagnostic_action_after_output`, on the ICE case).
The only other alternative would be to write your own libc on all platforms.
2. if the real `abort` is used, GCC installs a signal handler, which calls
async-signal-unsafe functions, such as malloc.
For the async latter case, the first offenders are:
(usual case, e.g. LANG=en_US.UTF-8)
#0 __GI___libc_malloc (bytes=50) at malloc.c:2917
#1 0x00007ffff689f4d6 in _nl_make_l10nflist
(l10nfile_list=l10nfile_list@entry=0x7ffff6c07b78 <_nl_loaded_domains>,
dirlist=dirlist@entry=0x7ffff69d7890 <_nl_default_dirname> "/usr/share/locale",
dirlist_len=18,
mask=mask@entry=0, language=language@entry=0x7fffffffcac0 "en_US.UTF-8",
territory=territory@entry=0x0, codeset=0x0, normalized_codeset=0x0,
modifier=0x0, filename=0x7fffffffcae0 "LC_MESSAGES/libc.mo", do_allocate=0)
at ../intl/l10nflist.c:166
#2 0x00007ffff689d2c7 in _nl_find_domain (dirname=dirname@entry=0x7ffff69d7890
<_nl_default_dirname> "/usr/share/locale", locale=locale@entry=0x7fffffffcac0
"en_US.UTF-8",
domainname=domainname@entry=0x7fffffffcae0 "LC_MESSAGES/libc.mo",
domainbinding=domainbinding@entry=0x0) at finddomain.c:91
#3 0x00007ffff689cb73 in __dcigettext (domainname=0x7ffff69d0860
<_libc_intl_domainname> "libc", msgid1=0x7ffff69d14c8 "Aborted", msgid2=0x0,
plural=0, n=0, category=5) at dcigettext.c:722
#4 0x0000000000993f01 in ?? ()
#5 <signal handler called>
(LC_ALL=C)
#0 __GI___libc_malloc (bytes=146) at malloc.c:2917
#1 0x0000000001050368 in xmalloc ()
#2 0x0000000001050517 in xvasprintf ()
#3 0x0000000000ff9cbc in build_message_string(char const*, ...) ()
#4 0x000000000084fe4e in lhd_print_error_function(diagnostic_context*, char
const*, diagnostic_info*) ()
#5 0x00000000009d16a1 in ?? ()
#6 0x0000000000ffadbd in diagnostic_report_diagnostic(diagnostic_context*,
diagnostic_info*) ()
#7 0x0000000000ffc2de in internal_error(char const*, ...) ()
#8 0x0000000000993f10 in ?? ()
#9 <signal handler called>
Frankly, writing signal handlers correctly is hard, and usually not worth it
(just `write(2)` a short message, then bail out). Especially since you've got
the driver watching your exit code, *and* most ICEs go through the
`fancy_abort` path anyway.
I did most of my testing against GCC 6.4.0, but visual inspection of trunk
looks like all the relevant code is unchanged.
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Subject: [Bug other/83150] GCC's internal use of `abort`is unsafe in several ways
Date: Sat, 25 Nov 2017 02:58:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>2. if the real `abort` is used, GCC installs a signal handler, which calls async-signal-unsafe functions, such as malloc.
The signal handler will always be sync unless someone decides to do a kill from
the command line.
>From gcc-bugs-return-583049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 02:59:41 2017
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Subject: [Bug other/83150] GCC's internal use of `abort`is unsafe in several ways
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-25
Ever confirmed|0 |1
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>both plugins and later system headers (including macros) that expect abort() to prevent further code execution,
Plugins are not well defined in GCC. Also system headers should not be using
abort really. Can you find one which uses abort?
>From gcc-bugs-return-583050-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 03:54:39 2017
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Subject: [Bug other/83150] GCC's internal use of `abort`is unsafe in several ways
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--- Comment #3 from Ben Longbons <b.r.longbons at gmail dot com> ---
(In reply to Andrew Pinski from comment #1)
> The signal handler will always be sync unless someone decides to do a kill
> from the command line.
You're assuming that no library ever calls abort(). Glibc certainly does,
notably in its malloc() implementation.
Also, there's SIGSEGV, which was pointed out *cannot* be handled synchronously.
For that, you probably need to implement an `__attribute__((signal_safe))` as a
slightly-extended version of `__attribute__((pure))`.
Plus ... are you really willing to bet that *no* internal callers of abort()
expect sane semantics?
(In reply to Andrew Pinski from comment #2)
> Plugins are not well defined in GCC.
That excuse is getting *really* old.
So far, the main difficulties I'm hitting are when GCC goes out of its way to
be difficult.
(and yet so far it's *still* easier to use than LLVM, though if this attitude
of "we categorically refuse to fix bugs" continues, that might change)
> Also system headers should not be
> using abort really. Can you find one which uses abort?
Why not? It's a perfectly legitimate function, and headers can implement
anything as an inline function.
And in the real world, some that *do*: libstdc++, libbfd, boost, LLVM ...
>From gcc-bugs-return-583051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 04:05:31 2017
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Subject: [Bug fortran/83149] [8 Regression] ICE on SELECT CASE: crash_signal in toplev.c:325
Date: Sat, 25 Nov 2017 04:05:00 -0000
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--- Comment #2 from Neil Carlson <neil.n.carlson at gmail dot com> ---
Here's another example. The ICE is coming at the same place, toplev.c:325, so
I think it may be the same underlying problem. Like the original example, the
ICE occurs only when the main program is in a separate file.
module mod1
integer :: ncells
end module
module mod2
contains
function get() result(array)
use mod1
real array(ncells)
end function
end module
With this in a separate file:
use mod2
s = sum(get())
end
Note that the ICE goes away if "use mod1" is moved up to the module scope.
Here's the traceback
$ gfortran gfortran-20171124f.f90 gfortran-20171124f-main.f90
gfortran-20171124f-main.f90:2:0:
s = sum(get())
internal compiler error: Segmentation fault
0xd6b98f crash_signal
../../gcc/toplev.c:325
0x90aeeb gfc_finish_var_decl
../../gcc/fortran/trans-decl.c:606
0x90a274 gfc_get_symbol_decl(gfc_symbol*)
../../gcc/fortran/trans-decl.c:1777
0x920387 gfc_conv_variable
../../gcc/fortran/trans-expr.c:2505
0x91c71a gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:7860
0x91ea0a gfc_apply_interface_mapping(gfc_interface_mapping*, gfc_se*,
gfc_expr*)
../../gcc/fortran/trans-expr.c:4355
0x8ebd04 gfc_set_loop_bounds_from_array_spec(gfc_interface_mapping*, gfc_se*,
gfc_array_spec*)
../../gcc/fortran/trans-array.c:920
0x91a5b1 gfc_conv_procedure_call(gfc_se*, gfc_symbol*, gfc_actual_arglist*,
gfc_expr*, vec<tree_node*, va_gc, vl_embed>*)
../../gcc/fortran/trans-expr.c:6024
0x91c6fa gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:7852
0x8fa083 gfc_add_loop_ss_code
../../gcc/fortran/trans-array.c:2796
0x8faab5 gfc_conv_loop_setup(gfc_loopinfo*, locus*)
../../gcc/fortran/trans-array.c:5097
0x93ad87 gfc_conv_intrinsic_arith
../../gcc/fortran/trans-intrinsic.c:4197
0x93fd3f gfc_conv_intrinsic_function(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-intrinsic.c:9146
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../../gcc/fortran/trans-expr.c:7852
0x925065 gfc_trans_assignment_1
../../gcc/fortran/trans-expr.c:10018
0x8e45cf trans_code
../../gcc/fortran/trans.c:1828
0x90e7a8 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6437
0x89d036 translate_all_program_units
../../gcc/fortran/parse.c:6091
0x89d036 gfc_parse_file()
../../gcc/fortran/parse.c:6294
0x8e0eaf gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug fortran/83149] [8 Regression] ICE on SELECT CASE: crash_signal in toplev.c:325
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--- Comment #3 from Neil Carlson <neil.n.carlson at gmail dot com> ---
Unlike comment 0 code, comment 2 code also gives an ICE with 7.2.1 and 6.4.1
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Ben Longbons from comment #3)
> (In reply to Andrew Pinski from comment #2)
> > Plugins are not well defined in GCC.
>
> That excuse is getting *really* old.
No matter how often you hear it, it is still true.
A plugin is not a separate thing running next to GCC. A plugin becomes
part of the same compiler process, and it has to play by all the same
rules as any other part of the compiler.
> So far, the main difficulties I'm hitting are when GCC goes out of its way
> to be difficult.
It doesn't. It is designed for one purpose; you want to use it some
other way. If you have constructive suggestions how to make things
easier for plugins (while at the same time not making things harder for
everyone else) we'd love to hear them (esp. if accompanied by patches).
Your "2." is a real bug I think. "1." not really, that's just a part of
the internal GCC design. See above.
>From gcc-bugs-return-583054-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 09:19:30 2017
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From: "lh_mouse at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83151] New: Explicit unsigned bitfields are treated as signed ones
Date: Sat, 25 Nov 2017 09:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83151
Bug ID: 83151
Summary: Explicit unsigned bitfields are treated as signed ones
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: lh_mouse at 126 dot com
Target Milestone: ---
Minimal testcase:
```c
struct foo {
unsigned bf : 6;
};
unsigned get(const struct foo *ptr){
return ~ptr->bf;
}
```
```
E:\Desktop>gcc -c test.c -Wall -Wextra -Wsign-conversion -Werror
test.c: In function 'get':
test.c:6:10: error: conversion to 'unsigned int' from 'int' may change the sign
of the result [-Werror=sign-conversion]
return ~ptr->bf;
^~~~~~~~
cc1.exe: all warnings being treated as errors
```
GCC manual says
> -fsigned-bitfields
> -funsigned-bitfields
> -fno-signed-bitfields
> -fno-unsigned-bitfields
> These options control whether a bit-feld is signed or unsigned, when the declaration does not use either signed or unsigned. By default, such a bit-feld is
> signed, because this is consistent: the basic integer types such as int are signed
> types.
but it looks certainly incorrect if an explicit `unsigned` is specified.
>From gcc-bugs-return-583055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 09:29:13 2017
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Subject: [Bug c/83151] Explicit unsigned bitfields are treated as signed ones
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
The operand of ~ is promoted to int first, thus the type of the result is also
int which is then implicitly converted to unsigned int on return.
>From gcc-bugs-return-583056-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 09:45:38 2017
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Subject: [Bug c/83151] Explicit unsigned bitfields are treated as signed ones
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Liu Hao <lh_mouse at 126 dot com> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Liu Hao <lh_mouse at 126 dot com> ---
Oh sorry for forgetting about that. I will close this PR.
BTW, despite the viability of silence the warning with a cast, will the warning
eventually go away? The promoted `int` will have its vacuum bits filled with
zeroes so there is no loss of information as if it were promoted to `unsigned`.
>From gcc-bugs-return-583057-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 10:13:47 2017
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Subject: [Bug c/83151] Explicit unsigned bitfields are treated as signed ones
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, the top bits are clear, thus ~ sets them and the conversion to unsigned
certainly does change the sign. So, if you aren't interested in this kind of
warning, don't enable it?
>From gcc-bugs-return-583058-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 10:19:52 2017
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Subject: [Bug target/82848] [8 Regression] ICE in expand_expr_real_2, at expr.c:8715
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Nov 25 10:19:16 2017
New Revision: 255148
URL: https://gcc.gnu.org/viewcvs?rev=255148&root=gcc&view=rev
Log:
PR target/82848
* config/rs6000/rs6000.c (rs6000_gimple_fold_builtin): Don't fold
builtins not enabled in the currently selected ISA.
* gcc.target/powerpc/pr82848.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr82848.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-583059-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 10:39:31 2017
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Subject: [Bug c/83151] Explicit unsigned bitfields are treated as signed ones
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--- Comment #4 from Liu Hao <lh_mouse at 126 dot com> ---
I do care about these warnings and that is why these warnings are enabled.
However the one in the original post seems nothing but false positive to me.
I know what the standard says about integer promotion (when used as an
arithmetic operand, any bit-field with type `int`, `unsigned` or `_Bool` will
be promoted to `int` if `int` is capable of representing all of its values
possible, and to `unsigned` otherwise). The conversion from signed types to
unsigned types are clearly implementation-defined, but according to GCC manual
"GCC supports only two’s complement integer types, and all bit patterns are
ordinary values" so conversion from unsigned types to their signed counterparts
is no-op.
No doubt adding casts would mute the warning, but sometimes it is not possible
e.g. in a compound assignment expression:
```
void set_mask(uint8_t * mask, uint8_t to_rm, uint8_t to_add){
*mask &= ~to_rm; // This leads to a warning about conversion from `int` to
`uint8_t`.
*mask |= to_add; // There is no warning because GCC knows the upper bits are
out of interest.
}
```
These assignment expressions have to be rewritten to use the non-compound form:
```
void set_mask(uint8_t * mask, uint8_t to_rm, uint8_t to_add){
*mask = (uint8_t)((*mask & ~to_rm) | to_add);
}
```
, being longer, more complex, thus harder to maintain.
I believe it can still be improved, since promotion from `uint8_t` to `int`
brings in bit zeroes. The higher bits can't be set to bit ones by bitwise
and'ing with anything, hence the waring is a false positive.
>From gcc-bugs-return-583060-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 11:12:48 2017
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Subject: [Bug target/82848] [8 Regression] ICE in expand_expr_real_2, at expr.c:8715
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-583061-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 12:22:50 2017
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From: "ian at rhymneyconsulting dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83152] New: Possible run time error in derived type i/o
Date: Sat, 25 Nov 2017 12:22:00 -0000
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Bug ID: 83152
Summary: Possible run time error in derived type i/o
Product: gcc
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I get the following run time error with a dtio example that I believe to be
correct.
Here is the derived type module.
#####
module ch3701_person_module
implicit none
type :: person
character (len=30) :: name
integer :: age
real :: height
real :: weight
contains
procedure :: print_person
generic :: write(formatted) => print_person
procedure :: read_person
generic :: read(formatted) => read_person
end type person
contains
subroutine print_person(p,unit_number,iotype,vlist,iostat,iomsg)
implicit none
class (person) , intent(in) :: p
integer , intent(in) :: unit_number
character (len=*) , intent(in) :: iotype
integer , dimension(:) , intent(in) :: vlist
integer , intent(out) :: iostat
character (len=*) , intent(inout) :: iomsg
character (len=40) :: person_format
person_format="(a,2x,i3,2x,f4.2,2x,f3.0)"
write (unit_number,fmt=person_format) &
p%name,p%age,p%height,p%weight
iostat=0
end subroutine print_person
subroutine read_person(p,unit_number,iotype,vlist,iostat,iomsg)
implicit none
class (person) , intent(inout) :: p
integer , intent(in) :: unit_number
character (len=*) , intent(in) :: iotype
integer , dimension(:) , intent(in) :: vlist
integer , intent(out) :: iostat
character (len=*) , intent(inout) :: iomsg
character (len=40) :: person_format
person_format='(a,2x,i3,2x,f4.2,2x,f3.0)'
read (unit_number,fmt=person_format) &
p%name,p%age,p%height,p%weight
iostat=0
end subroutine read_person
end module ch3701_person_module
#####
Here is the main program
#####
include 'ch3701_person_module.f90'
program ch3701
use ch3701_person_module
integer , parameter :: n=4
type (person) , dimension(n) :: p
integer :: i
open(unit=99,file='ch3701_input_file.txt')
do i=1,n
read( 99 , 10 ) p(i)
10 format( DT )
write( * , 20 ) p(i)
20 format( DT )
end do
end program ch3701
#####
Here is the data file.
#####
Zahpod Beeblebrox 42 1.85 75
Ford Prefect 25 1.75 65
Arthur Dent 30 1.72 68
Trillian 30 1.65 45
#####
Here is the error message.
#####
gfortran_ch3701.exe
At line 61 of file ch3701_person_module.f90 (unit = 99, file =
'ch3701_input_file.txt')
Fortran runtime error: End of record
Error termination. Backtrace:
Could not print backtrace: libbacktrace could not find executable to open
#0 0xffffffff
#1 0xffffffff
#2 0xffffffff
#3 0xffffffff
#4 0xffffffff
#5 0xffffffff
#6 0xffffffff
#7 0xffffffff
#8 0xffffffff
#9 0xffffffff
#10 0xffffffff
#11 0xffffffff
#12 0xffffffff
#13 0xffffffff
#14 0xffffffff
#15 0xffffffff
#####
>From gcc-bugs-return-583062-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 12:28:43 2017
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From: "ian at rhymneyconsulting dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83153] New: Possible run time error in derived type io example - 2
Date: Sat, 25 Nov 2017 12:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83153
Bug ID: 83153
Summary: Possible run time error in derived type io example - 2
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
I get a similar error with the following sample code.
Here is the derived type module.
#####
module ch3702_person_module
implicit none
type :: person
character (len=30) :: name
integer :: age
real :: height
real :: weight
contains
procedure :: print_person
generic :: write(formatted) => print_person
procedure :: read_person
generic :: read(formatted) => read_person
end type person
contains
subroutine print_person(p,unit_number,iotype,vlist,iostat,iomsg)
implicit none
class (person) , intent(in) :: p
integer , intent(in) :: unit_number
character (len=*) , intent(in) :: iotype
integer , dimension(:) , intent(in) :: vlist
integer , intent(out) :: iostat
character (len=*) , intent(inout) :: iomsg
character (len=40) :: person_format
write(person_format,10)'(a',vlist(1),&
',' ,&
'i',vlist(2),&
',2x,' ,&
'f',vlist(3),&
'.',vlist(4),&
',2x,' ,&
'f',vlist(5),&
'.0)'
10 format(a,i2,&
a, &
a,i1,&
a, &
a,i1,&
a,i1,&
a, &
a,i1,&
a)
write (unit_number,fmt=person_format) &
p%name,p%age,p%height,p%weight
iostat=0
end subroutine print_person
subroutine read_person(p,unit_number,iotype,vlist,iostat,iomsg)
implicit none
class (person) , intent(inout) :: p
integer , intent(in) :: unit_number
character (len=*) , intent(in) :: iotype
integer , dimension(:) , intent(in) :: vlist
integer , intent(out) :: iostat
character (len=*) , intent(inout) :: iomsg
character (len=40) :: person_format
write(person_format,10)'(a',vlist(1),&
',2x,' ,&
'i',vlist(2),&
',2x,' ,&
'f',vlist(3),&
'.',vlist(4),&
',2x,' ,&
'f',vlist(5),&
'.0)'
10 format(a,i2,&
a, &
a,i1,&
a, &
a,i1,&
a,i1,&
a, &
a,i1,&
a)
read (unit_number,fmt=person_format) &
p%name,p%age,p%height,p%weight
iostat=0
end subroutine read_person
end module ch3702_person_module
#####
Here is the driving program.
#####
include 'ch3702_person_module.f90'
program ch3702
use ch3702_person_module
integer , parameter :: n=4
type (person) , dimension(n) :: p
integer :: i
open(unit=99,file='ch3701_input_file.txt')
do i=1,n
read( 99 , 10 ) p(i)
10 format( DT(30,3,4,2,3) )
write( * , 20 ) p(i)
20 format( DT(20,5,4,2,3) )
end do
end program ch3702
#####
Here is the input file.
I have repeated the inclusion of the file even though it is the same
as in the eariler example.
#####
Zahpod Beeblebrox 42 1.85 75
Ford Prefect 25 1.75 65
Arthur Dent 30 1.72 68
Trillian 30 1.65 45
#####
Here is the error message.
#####
gfortran_ch3702
At line 95 of file ch3702_person_module.f90 (unit = 99, file =
'ch3701_input_file.txt')
Fortran runtime error: End of record
Error termination. Backtrace:
Could not print backtrace: libbacktrace could not find executable to open
#0 0xffffffff
#1 0xffffffff
#2 0xffffffff
#3 0xffffffff
#4 0xffffffff
#5 0xffffffff
#6 0xffffffff
#7 0xffffffff
#8 0xffffffff
#9 0xffffffff
#10 0xffffffff
#11 0xffffffff
#12 0xffffffff
#13 0xffffffff
#14 0xffffffff
#15 0xffffffff
#####
I have two additional examples based on these derived type modules
that work when I only do the writes, with no reads.
#####
>From gcc-bugs-return-583063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 12:29:16 2017
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From: "physiker at toast2 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83154] New: ICE: associate and coarrays
Date: Sat, 25 Nov 2017 12:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83154
Bug ID: 83154
Summary: ICE: associate and coarrays
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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Compiling the program bug.f90 causes an internal compiler error. It seems the
implementation of the associate facility for coarrays is not complete. Some
features are implemented, though (see PR78152).
program co_assoc
implicit none
integer, parameter :: p = 5
real, allocatable :: a(:,:)[:,:]
allocate (a(0:p+1,0:p+1)[2,*])
associate ( &
b => a(1:p, 1:p), &
c => a(0:p-1, 1:p ), &
d => a(2:p+1, 1:p ), &
e => a(1:p , 2:p+1), &
f => a(1:p , 0:p-1))
end associate
end program co_assoc
bash-3.2$ LANG=C caf bug.f90 -Wall -v
Driving: /usr/local/bin/gfortran-8
-I/Users/Peter/Downloads/tmp/gcc-8/OpenCoarrays/prerequisites/installations/include/OpenCoarrays-1.9.2-15-g55a3cbe_GNU-8.0.0
-fcoarray=lib -Wl,-flat_namespace -Wl,-commons,use_dylibs bug.f90 -Wall -v
/Users/Peter/Downloads/tmp/gcc-8/OpenCoarrays/prerequisites/installations/lib/libcaf_mpi.a
/Users/Peter/Downloads/tmp/gcc-8/OpenCoarrays/prerequisites/installations/mpich/3.2/lib/libmpifort.dylib
/Users/Peter/Downloads/tmp/gcc-8/OpenCoarrays/prerequisites/installations/mpich/3.2/lib/libmpi.dylib
/Users/Peter/Downloads/tmp/gcc-8/OpenCoarrays/prerequisites/installations/mpich/3.2/lib/libpmpi.dylib
-mmacosx-version-min=10.11.0 -asm_macosx_version_min=10.11 -l gfortran
-shared-libgcc
Using built-in specs.
COLLECT_GCC=/usr/local/bin/gfortran-8
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-apple-darwin15.6.0/8.0.0/lto-wrapper
Target: x86_64-apple-darwin15.6.0
Configured with: ../gcc/configure --enable-languages=c,c++,fortran,lto
--with-gmp=/sw --with-libiconv-prefix=/sw --with-isl=/sw --with-mpc=/sw
--with-system-zlib --program-suffix=-8
Thread model: posix
gcc version 8.0.0 20171124 (experimental) [trunk revision 255144] (GCC)
COLLECT_GCC_OPTIONS='-I'
'/Users/Peter/Downloads/tmp/gcc-8/OpenCoarrays/prerequisites/installations/include/OpenCoarrays-1.9.2-15-g55a3cbe_GNU-8.0.0'
'-fcoarray=lib' '-Wall' '-v' '-mmacosx-version-min=10.11.0'
'-asm_macosx_version_min=10.11' '-shared-libgcc' '-mtune=core2'
/usr/local/libexec/gcc/x86_64-apple-darwin15.6.0/8.0.0/f951 bug.f90 -I
/Users/Peter/Downloads/tmp/gcc-8/OpenCoarrays/prerequisites/installations/include/OpenCoarrays-1.9.2-15-g55a3cbe_GNU-8.0.0
-fPIC -quiet -dumpbase bug.f90 -mmacosx-version-min=10.11.0 -mtune=core2
-auxbase bug -Wall -version -fcoarray=lib -fintrinsic-modules-path
/usr/local/lib/gcc/x86_64-apple-darwin15.6.0/8.0.0/finclude -o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cchnI3u2.s
GNU Fortran (GCC) version 8.0.0 20171124 (experimental) [trunk revision 255144]
(x86_64-apple-darwin15.6.0)
compiled by GNU C version 8.0.0 20171124 (experimental) [trunk revision
255144], GMP version 6.1.2, MPFR version 3.1.6, MPC version 1.0.3, isl version
isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU Fortran2008 (GCC) version 8.0.0 20171124 (experimental) [trunk revision
255144] (x86_64-apple-darwin15.6.0)
compiled by GNU C version 8.0.0 20171124 (experimental) [trunk revision
255144], GMP version 6.1.2, MPFR version 3.1.6, MPC version 1.0.3, isl version
isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
bug.f90:11:0:
f => a(1:p , 0:p-1))
internal compiler error: in generate_coarray_sym_init, at
fortran/trans-decl.c:5236
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Error: comand:
`/usr/local/bin/gfortran-8
-I/Users/Peter/Downloads/tmp/gcc-8/OpenCoarrays/prerequisites/installations/include/OpenCoarrays-1.9.2-15-g55a3cbe_GNU-8.0.0
-fcoarray=lib -Wl,-flat_namespace -Wl,-commons,use_dylibs bug.f90 -Wall -v
/Users/Peter/Downloads/tmp/gcc-8/OpenCoarrays/prerequisites/installations/lib/libcaf_mpi.a
/Users/Peter/Downloads/tmp/gcc-8/OpenCoarrays/prerequisites/installations/mpich/3.2/lib/libmpifort.dylib
/Users/Peter/Downloads/tmp/gcc-8/OpenCoarrays/prerequisites/installations/mpich/3.2/lib/libmpi.dylib
/Users/Peter/Downloads/tmp/gcc-8/OpenCoarrays/prerequisites/installations/mpich/3.2/lib/libpmpi.dylib`
failed to compile.
>From gcc-bugs-return-583064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 12:38:23 2017
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Subject: [Bug c/81851] missing -Wduplicated-branches on if and return statements with no else
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-25
Ever confirmed|0 |1
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
Putting in WAITING for a response from Martin
>From gcc-bugs-return-583065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 12:44:40 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug jit/83155] New: [8 regression] test-error-array-bounds.c.exe fail
Date: Sat, 25 Nov 2017 12:44:00 -0000
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Bug ID: 83155
Summary: [8 regression] test-error-array-bounds.c.exe fail
Product: gcc
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r254830 triggers this:
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/jit.dg/test-error-array-bounds.c
-fno-diagnostics-show-caret -fdiagnostics-color=never
-I/source/gcc/testsuite/../jit -lgccjit -g -Wall -Werror -Wl,--export-dynamic
-fgnu89-inline -lm -o test-error-array-bounds.c.exe
PASS: jit.dg/test-error-array-bounds.c, initial compilation
PASS: test-error-array-bounds.c.exe iteration 1 of 5: set_up_logging: logfile
is non-null
FAIL: test-error-array-bounds.c.exe iteration 1 of 5: verify_code: actual:
"array subscript 10 is above array bounds of 'unsigned char
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=haswell --with-cpu=haswell
>From gcc-bugs-return-583066-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 12:46:41 2017
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Subject: [Bug bootstrap/81033] [8 Regression] Revision r249019 breaks bootstrap on darwin
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--- Comment #29 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #28)
> Bootstrap is fixed, but the fix did not please to Iain Sandoe.
The fix allows bootstrap to proceed, but doesn't solve the underlying problem
(which is that there are cases where the linker [ld64] is not able to determine
correct atom boundaries from the output we currently produce from GCC).
I will hopefully have some cycles for Darwin over the next month to address
this and other issues.
>From gcc-bugs-return-583067-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 12:50:33 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83054] [8 Regression] ICE in operator>, at profile-count.h:823
Date: Sat, 25 Nov 2017 12:50:00 -0000
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Andrey Guskov <andrey.y.guskov at intel dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andrey.y.guskov at intel dot com
--- Comment #1 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Make check is also affected by r254832:
spawn gdb -nx -nw -quiet -batch -x pr43051-1.gdb ./pr43051-1.exe
FAIL: gcc.dg/guality/pr43051-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 34 c == &a[0]
>From gcc-bugs-return-583068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 12:53:07 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83156] New: [8 regression] gcc.target/i386/pr82361-1.c fail
Date: Sat, 25 Nov 2017 12:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83156
Bug ID: 83156
Summary: [8 regression] gcc.target/i386/pr82361-1.c fail
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
r254874 triggers this:
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.target/i386/pr82361-1.c
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-fdiagnostics-color=never -O2 -mtune=generic -masm=att -mno-8bit-idiv
-ffat-lto-objects -S -o pr82361-1.s
PASS: gcc.target/i386/pr82361-1.c (test for excess errors)
FAIL: gcc.target/i386/pr82361-1.c scan-assembler-not movl %eax, %eax
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=haswell --with-cpu=haswell
>From gcc-bugs-return-583069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 12:56:59 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83156] [8 regression] gcc.target/i386/pr82361-1.c fail
Date: Sat, 25 Nov 2017 12:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83156
--- Comment #1 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
gcc.target/i386/pr82361-2.c is also affected:
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.target/i386/pr82361-1.c
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-fdiagnostics-color=never -O2 -mtune=generic -masm=att -mno-8bit-idiv
-ffat-lto-objects -S -o pr82361-1.s
PASS: gcc.target/i386/pr82361-1.c (test for excess errors)
FAIL: gcc.target/i386/pr82361-1.c scan-assembler-not movl %eax, %eax
FAIL: gcc.target/i386/pr82361-1.c scan-assembler-times movl %edx, %edx 2
(found 4 times)
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.target/i386/pr82361-2.c
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-fdiagnostics-color=never -O2 -mtune=generic -masm=att -m8bit-idiv
-ffat-lto-objects -S -o pr82361-2.s
PASS: gcc.target/i386/pr82361-2.c (test for excess errors)
FAIL: gcc.target/i386/pr82361-2.c scan-assembler-not movl %eax, %eax
>From gcc-bugs-return-583070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 13:01:53 2017
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Subject: [Bug fortran/83154] ICE: associate and coarrays
Date: Sat, 25 Nov 2017 13:01:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-25
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed with '-fcoarray=lib', the code compiles with '-fcoarray=single'. The
ICE is a regression, but the code is rejected with 7.2.0:
pr83154.f90:7:20:
b => a(1:p, 1:p), &
1
Error: Variable 'b' at (1) is a coarray and is not ALLOCATABLE, SAVE nor a
dummy argument
pr83154.f90:8:24:
c => a(0:p-1, 1:p ), &
1
Error: Variable 'c' at (1) is a coarray and is not ALLOCATABLE, SAVE nor a
dummy argument
pr83154.f90:9:24:
d => a(2:p+1, 1:p ), &
1
Error: Variable 'd' at (1) is a coarray and is not ALLOCATABLE, SAVE nor a
dummy argument
pr83154.f90:10:24:
e => a(1:p , 2:p+1), &
1
Error: Variable 'e' at (1) is a coarray and is not ALLOCATABLE, SAVE nor a
dummy argument
pr83154.f90:11:24:
f => a(1:p , 0:p-1))
1
Error: Variable 'f' at (1) is a coarray and is not ALLOCATABLE, SAVE nor a
dummy argument
>From gcc-bugs-return-583071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 13:04:19 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83125] [8 regression] ICE in edge_badness, at ipa-inline.c:1025
Date: Sat, 25 Nov 2017 13:04:00 -0000
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Andrey Guskov <andrey.y.guskov at intel dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andrey.y.guskov at intel dot com
--- Comment #2 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Possibly unrelated, but also triggered by r254924 in make check:
spawn -ignore SIGHUP /work/./gcc/xg++ -shared-libgcc -B/work/./gcc -nostdinc++
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/src
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/install/x86_64-pc-linux-gnu/bin/ -B/install/x86_64-pc-linux-gnu/lib/
-isystem /install/x86_64-pc-linux-gnu/include -isystem
/install/x86_64-pc-linux-gnu/sys-include
-B/work/x86_64-pc-linux-gnu/./libstdc++-v3/src/.libs -fmessage-length=0
-fno-show-column -ffunction-sections -fdata-sections -g -O2 -D_GNU_SOURCE
-DLOCALEDIR="." -nostdinc++
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/source/libstdc++-v3/libsupc++ -I/source/libstdc++-v3/include/backward
-I/source/libstdc++-v3/testsuite/util
/source/libstdc++-v3/testsuite/ext/special_functions/hyperg/check_value.cc
-D__STDCPP_WANT_MATH_SPEC_FUNCS__ -fno-diagnostics-show-caret
-fdiagnostics-color=never ./libtestc++.a -Wl,--gc-sections
-L/work/x86_64-pc-linux-gnu/libstdc++-v3/src/filesystem/.libs -lm -o
./check_value.exe
PASS: ext/special_functions/hyperg/check_value.cc (test for excess errors)
spawn [open ...]
FAIL: ext/special_functions/hyperg/check_value.cc execution test
>From gcc-bugs-return-583072-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 13:17:36 2017
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Subject: [Bug c/83117] [8 Regression] FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test for excess errors)
Date: Sat, 25 Nov 2017 13:17:00 -0000
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Andrey Guskov <andrey.y.guskov at intel dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andrey.y.guskov at intel dot com
--- Comment #4 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Also seeing this. Started with r254930.
gcc/testsuite/gcc29/ms-sysv/ms-sysv-generated.h:18060:9: warning: function
called through a non-compatible type
<...>
gcc/testsuite/gcc29/ms-sysv/ms-sysv-generated.h:32369:9: warning: function
called through a non-compatible type
gcc/testsuite/gcc29/ms-sysv/ms-sysv-generated.h:32374:9: warning: function
called through a non-compatible type
gcc/testsuite/gcc29/ms-sysv/ms-sysv-generated.h:32380:9: warning: function
called through a non-compatible type
FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c -O2 "-DGEN_ARGS=-p5" (test for
excess errors)
>From gcc-bugs-return-583073-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 13:23:47 2017
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Subject: [Bug debug/83157] New: [8 regression] gcc.dg/guality/pr41616-1.c fail
Date: Sat, 25 Nov 2017 13:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83157
Bug ID: 83157
Summary: [8 regression] gcc.dg/guality/pr41616-1.c fail
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: andrey.y.guskov at intel dot com
Target Milestone: ---
r254946 triggers this:
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.dg/guality/pr41616-1.c -fno-diagnostics-show-caret
-fdiagnostics-color=never -O3 -g -g -fgnu89-inline -lm -o ./pr41616-1.exe
PASS: gcc.dg/guality/pr41616-1.c -O3 -g (test for excess errors)
spawn [open ...]
PASS: guality/guality.h: b is -1
FAIL: guality/guality.h: b is -1, not 1
FAIL: guality/guality.h: 1 PASS, 1 FAIL, 0 UNRESOLVED
FAIL: gcc.dg/guality/pr41616-1.c -O3 -g execution test
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=haswell --with-cpu=haswell
>From gcc-bugs-return-583074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 13:25:32 2017
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From: "slyfox at inbox dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/78553] GCC 5.3.0 and 5.4.0 segfault during bootstrap when --enable-vtable-verify is enabled on PowerPC musl
Date: Sat, 25 Nov 2017 13:25:00 -0000
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Sergei Trofimovich <slyfox at inbox dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |slyfox at inbox dot ru
--- Comment #1 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Also seems to happen on powerpc64-unknown-linux-gnu
[sf]
/tmp/portage/cross-powerpc64-unknown-linux-gnu/gcc-7.2.0/work/build/powerpc64-unknown-linux-gnu/libstdc++-v3/src:gdb
--args
/tmp/portage/cross-powerpc64-unknown-linux-gnu/gcc-7.2.0/work/build/./gcc/cc1plus
-quiet -nostdinc++ -v -I
/tmp/portage/cross-powerpc64-unknown-linux-gnu/gcc-7.2.0/work/build/powerpc64-unknown-linux-gnu/libstdc++-v3/include/powerpc64-unknown-linux-gnu
-I
/tmp/portage/cross-powerpc64-unknown-linux-gnu/gcc-7.2.0/work/build/powerpc64-unknown-linux-gnu/libstdc++-v3/include
-I
/tmp/portage/cross-powerpc64-unknown-linux-gnu/gcc-7.2.0/work/gcc-7.2.0/libstdc++-v3/libsupc++
-iprefix
/tmp/portage/cross-powerpc64-unknown-linux-gnu/gcc-7.2.0/work/build/gcc/../../../../lib/gcc/powerpc64-unknown-linux-gnu/7.2.0/
-isystem
/tmp/portage/cross-powerpc64-unknown-linux-gnu/gcc-7.2.0/work/build/./gcc/include
-isystem
/tmp/portage/cross-powerpc64-unknown-linux-gnu/gcc-7.2.0/work/build/./gcc/include-fixed
-D_GNU_SOURCE -D__unix__ -D__gnu_linux__ -D__linux__ -Dunix -D__unix -Dlinux
-D__linux -Asystem=linux -Asystem=unix -Asystem=posix -D PIC -D _GNU_SOURCE -D
PIC -D _GLIBCXX_SHARED -isystem /usr/powerpc64-unknown-linux-gnu/include
-isystem /usr/powerpc64-unknown-linux-gnu/sys-include
/tmp/portage/cross-powerpc64-unknown-linux-gnu/gcc-7.2.0/work/gcc-7.2.0/libstdc++-v3/src/c++98/compatibility.cc
-msecure-plt -fstack-check -quiet -dumpbase compatibility.cc -auxbase-strip
.libs/compatibility.o -g -O2 -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi
-std=gnu++98 -version -fno-implicit-templates -fvtable-verify=std
-fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=compatibility.lo -fPIC -o /tmp/ccKqbE0M.s
Program received signal SIGSEGV, Segmentation fault.
0x0000000000889de8 in symtab_node::ultimate_alias_target(availability*,
symtab_node*) ()
(gdb) bt
#0 0x0000000000889de8 in symtab_node::ultimate_alias_target(availability*,
symtab_node*) ()
#1 0x0000000000a47d05 in cgraph_node::ultimate_alias_target(availability*,
symtab_node*) ()
#2 0x00000000012b9d27 in call_ABI_of_interest(tree_node*) ()
#3 0x00000000012b9fee in init_cumulative_args(rs6000_args*, tree_node*,
rtx_def*, int, int, int, tree_node*, machine_mode) ()
#4 0x00000000009ed43b in expand_call(tree_node*, rtx_def*, int) ()
#5 0x0000000000b5a63a in expand_expr_real_1(tree_node*, rtx_def*,
machine_mode, expand_modifier, rtx_def**, bool) ()
#6 0x0000000000b50a9b in expand_expr_real(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool) ()
#7 0x0000000000b4a04a in store_expr_with_bounds(tree_node*, rtx_def*, int,
bool, bool, tree_node*) ()
#8 0x0000000000b49477 in expand_assignment(tree_node*, tree_node*, bool) ()
#9 0x0000000000a034ab in expand_call_stmt(gcall*) ()
#10 0x0000000000a060aa in expand_gimple_stmt_1(gimple*) ()
#11 0x0000000000a06665 in expand_gimple_stmt(gimple*) ()
#12 0x0000000000a0c925 in expand_gimple_basic_block(basic_block_def*, bool) ()
#13 0x0000000000a0dee6 in (anonymous
namespace)::pass_expand::execute(function*) ()
#14 0x0000000000e14a0d in execute_one_pass(opt_pass*) ()
#15 0x0000000000e14d72 in execute_pass_list_1(opt_pass*) ()
#16 0x0000000000e14dfb in execute_pass_list(function*, opt_pass*) ()
#17 0x0000000000a518e9 in cgraph_node::expand() ()
#18 0x0000000000a51da4 in expand_all_functions() ()
#19 0x0000000000a528f2 in symbol_table::compile() ()
#20 0x0000000000a52b5a in symbol_table::finalize_compilation_unit() ()
#21 0x0000000000f2f13e in compile_file() ()
#22 0x0000000000f3177a in do_compile() ()
#23 0x0000000000f31a57 in toplev::main(int, char**) ()
#24 0x00000000017c994e in main ()
gcc was compiled on x86_64 to target powerpc64 as:
/tmp/portage/cross-powerpc64-unknown-linux-gnu/gcc-7.2.0/work/build/./gcc/xgcc
-v
ИÑпользуютÑÑ Ð²Ð½ÑƒÑ‚Ñ€ÐµÐ½Ð½Ð¸Ðµ Ñпецификации.
COLLECT_GCC=/tmp/portage/cross-powerpc64-unknown-linux-gnu/gcc-7.2.0/work/build/./gcc/xgcc
Ð¦ÐµÐ»ÐµÐ²Ð°Ñ Ð°Ñ€Ñ…Ð¸Ñ‚ÐµÐºÑ‚ÑƒÑ€Ð°: powerpc64-unknown-linux-gnu
Параметры конфигурации:
/tmp/portage/cross-powerpc64-unknown-linux-gnu/gcc-7.2.0/work/gcc-7.2.0/configure
--host=x86_64-pc-linux-gnu --target=powerpc64-unknown-linux-gnu
--build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/powerpc64-unknown-linux-gnu/gcc-bin/7.2.0
--includedir=/usr/lib/gcc/powerpc64-unknown-linux-gnu/7.2.0/include
--datadir=/usr/share/gcc-data/powerpc64-unknown-linux-gnu/7.2.0
--mandir=/usr/share/gcc-data/powerpc64-unknown-linux-gnu/7.2.0/man
--infodir=/usr/share/gcc-data/powerpc64-unknown-linux-gnu/7.2.0/info
--with-gxx-include-dir=/usr/lib/gcc/powerpc64-unknown-linux-gnu/7.2.0/include/g++-v7
--with-python-dir=/share/gcc-data/powerpc64-unknown-linux-gnu/7.2.0/python
--enable-languages=c,c++ --enable-obsolete --enable-secureplt --disable-werror
--with-system-zlib --enable-nls --without-included-gettext
--enable-checking=release --with-bugurl=https://bugs.gentoo.org/
--with-pkgversion='Gentoo Hardened 7.2.0 p1.1' --enable-esp
--enable-libstdcxx-time --enable-poison-system-directories
--with-sysroot=/usr/powerpc64-unknown-linux-gnu --disable-bootstrap
--enable-__cxa_atexit --enable-clocale=gnu --disable-multilib --disable-altivec
--disable-fixed-point --enable-targets=all --disable-libgcj --enable-libgomp
--disable-libmudflap --disable-libssp --disable-libcilkrts --disable-libmpx
--enable-vtable-verify --enable-libvtv --disable-libquadmath --enable-lto
--with-isl --disable-isl-version-check --enable-libsanitizer
--enable-default-pie --enable-default-ssp
Модель многопоточноÑти: posix
gcc верÑÐ¸Ñ 7.2.0 (Gentoo Hardened 7.2.0 p1.1)
>From gcc-bugs-return-583075-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 13:31:36 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83158] New: [8 regression] gcc.target/i386/pr78057.c fail
Date: Sat, 25 Nov 2017 13:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83158
Bug ID: 83158
Summary: [8 regression] gcc.target/i386/pr78057.c fail
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: andrey.y.guskov at intel dot com
Target Milestone: ---
r254954 triggers this:
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.target/i386/pr78057.c
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-fdiagnostics-color=never -O2 -mbmi -mlzcnt -fdump-tree-optimized -S -o
pr78057.s
PASS: gcc.target/i386/pr78057.c (test for excess errors)
PASS: gcc.target/i386/pr78057.c scan-tree-dump-not optimized "link_error"
FAIL: gcc.target/i386/pr78057.c scan-tree-dump-not optimized
"__builtin_ia32_[lt]zcnt"
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=haswell --with-cpu=haswell
Not sure whether this is a dupe of either pr83072 or pr83073.
>From gcc-bugs-return-583076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 13:46:35 2017
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83158] [8 regression] gcc.target/i386/pr78057.c fail
Date: Sat, 25 Nov 2017 13:46:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-25
Ever confirmed|0 |1
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
It is related to PR 83073 but not quite a dup, it looks like another case where
we have more information than we can store in a range, and choose a subset that
hurts in this testcase. The opposite choice would hurt a different testcase,
the issue is finding a reasonable heuristic (say give priority to excluding 0
from the range for instance). The (longer term) plans to have 2+-component
ranges would also help.
>From gcc-bugs-return-583077-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 14:02:07 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/83159] New: [8 regression] g++.dg/gomp/declare-simd-1.C fail
Date: Sat, 25 Nov 2017 14:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83159
Bug ID: 83159
Summary: [8 regression] g++.dg/gomp/declare-simd-1.C fail
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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CC: jakub at gcc dot gnu.org
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r255018 triggers this:
spawn -ignore SIGHUP /work/gcc/testsuite/g++7/../../xg++
-B/work/gcc/testsuite/g++7/../../
/source/gcc/testsuite/g++.dg/gomp/declare-simd-1.C -fno-diagnostics-show-caret
-fdiagnostics-color=never -nostdinc++
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/source/libstdc++-v3/libsupc++ -I/source/libstdc++-v3/include/backward
-I/source/libstdc++-v3/testsuite/util -fmessage-length=0 -std=gnu++98 -fopenmp
-ffat-lto-objects -S -o declare-simd-1.s
FAIL: g++.dg/gomp/declare-simd-1.C -std=gnu++98 (test for excess errors)
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=haswell --with-cpu=haswell
>From gcc-bugs-return-583078-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 14:14:36 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83152] Possible run time error in derived type i/o
Date: Sat, 25 Nov 2017 14:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83152
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-25
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed.
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Subject: [Bug fortran/83153] Possible run time error in derived type io example - 2
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83153
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed. Likely a duplicate of pr83152.
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Subject: [Bug jit/83155] [8 regression] test-error-array-bounds.c.exe fail
Date: Sat, 25 Nov 2017 14:25:00 -0000
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--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
I believe I fixed this in r255082.
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Subject: =?UTF-8?B?W0J1ZyBjKysvODMxNjBdIE5ldzogWzggcmVncmVzc2lvbl0gbHZhbHVlIHJl?= =?UTF-8?B?cXVpcmVkIGFzIHVuYXJ5IOKAmCbigJkgb3BlcmFuZA==?Date: Sat, 25 Nov 2017 14:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83160
Bug ID: 83160
Summary: [8 regression] lvalue required as unary ‘&’ operand
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
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Created attachment 42716
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42716&action=edit
Test case source file
This issue appear in HHVM build with GCC 8. GCC 7.2.1 works fine with attached
test case.
$ cat File.i.cpp
namespace a {
template <typename b> void ac(b, const b &);
}
int ag;
class c {
c();
};
template <bool, class...> class C;
C<false> ak();
template <class, bool, class...> class d {
public:
template <class an> void operator()(an &) const;
template <class ao> void e(ao) {
auto appender = [] {};
(*this)(appender);
}
void f() { e(ag); }
};
template <bool, class...> class C : public d<int, 1> {};
template <class be, bool bd, class... aj>
template <class an>
void d<be, bd, aj...>::operator()(an &) const {
constexpr int bj = 8;
[](int bk) { a::ac(bk, bj); };
}
c::c() { ak().f(); }
### Fail with GCC 8.0
$g++ --version
g++ (GCC) 8.0.0 20171124 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$g++ -ffunction-sections -fno-delete-null-pointer-checks -std=gnu++1y
-fno-omit-frame-pointer -fno-operator-names -fdata-sections -fno-gcse
-fno-canonical-system-headers -mcrc32 -O3 --param max-inline-insns-auto=100
--param early-inlining-insns=200 --param max-early-inliner-iterations=50
--param=inline-unit-growth=200 --param=large-unit-insns=10000
-momit-leaf-frame-pointer -Wall -Wextra -o File.i.cpp.o -c File.i.cpp -Wall
-Wextra
File.i.cpp: In instantiation of ‘void d< <template-parameter-1-1>, <anonymous>,
<template-parameter-1-3> >::operator()(an&) const [with an = d<
<template-parameter-1-1>, <anonymous>, <template-parameter-1-3> >::e(ao) [with
ao = int; <template-parameter-1-1> = int; bool <anonymous> = true;
<template-parameter-1-3> = {}]::<lambda()>; <template-parameter-1-1> = int;
bool <anonymous> = true; <template-parameter-1-3> = {}]’:
File.i.cpp:15:12: required from ‘void d< <template-parameter-1-1>,
<anonymous>, <template-parameter-1-3> >::e(ao) [with ao = int;
<template-parameter-1-1> = int; bool <anonymous> = true;
<template-parameter-1-3> = {}]’
File.i.cpp:17:14: required from ‘void d< <template-parameter-1-1>,
<anonymous>, <template-parameter-1-3> >::f() [with <template-parameter-1-1> =
int; bool <anonymous> = true; <template-parameter-1-3> = {}]’
File.i.cpp:26:17: required from here
File.i.cpp:24:21: error: lvalue required as unary ‘&’ operand
[](int bk) { a::ac(bk, bj); };
~~~~~^~~~~~~~
### Pass with GCC 7.2.1
$g++ --version
g++ (GCC) 7.2.1 20171124
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$g++ -ffunction-sections -fno-delete-null-pointer-checks -std=gnu++1y
-fno-omit-frame-pointer -fno-operator-names -fdata-sections -fno-gcse
-fno-canonical-system-headers -mcrc32 -O3 --param max-inline-insns-auto=100
--param early-inlining-insns=200 --param max-early-inliner-iterations=50
--param=inline-unit-growth=200 --param=large-unit-insns=10000
-momit-leaf-frame-pointer -Wall -Wextra -o File.i.cpp.o -c File.i.cpp -Wall
-Wextra
$ echo $?
0
>From gcc-bugs-return-583082-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 14:37:33 2017
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Subject: [Bug libgomp/83159] [8 regression] g++.dg/gomp/declare-simd-1.C fail
Date: Sat, 25 Nov 2017 14:37:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
r255117 should have fixed this already.
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Subject: [Bug middle-end/70773] Profiled sudoku solver slower due to lack of sdiv/udiv
Date: Sat, 25 Nov 2017 15:14:00 -0000
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--- Comment #22 from PeteVine <tulipawn at gmail dot com> ---
> I don't know what exactly "fixed" this
That would be nice to know. This I can say for sure: gcc 7.2.1 20171116 still
produces slower profiled code on the target system.
I've also discovered, compiling and profiling on a binary compatible Cortex A17
system (same flags), produces binaries that don't run any slower on the target
system.
>From gcc-bugs-return-583084-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 17:29:07 2017
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From: "Hi-Angel at yandex dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/83161] New: Feature request: add a builtin for printing structs and classes
Date: Sat, 25 Nov 2017 17:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83161
Bug ID: 83161
Summary: Feature request: add a builtin for printing structs
and classes
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
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Target Milestone: ---
It's very useful for debugging to pretty-print an entire struct. Typically
people firing up gdb for this, but sometimes it's hard, like on embedded
systems; and always is time-consuming.
This issue is popular enough that e.g. the new systems language Rust have this
functionality built-in.
Some relevant questions to show demand:
1. "Printing values of all fields in a C++ structure"
https://stackoverflow.com/questions/2758937/printing-values-of-all-fields-in-a-c-structure
22k views.
2. Someone attempting the same thing for linux kernel
https://stackoverflow.com/questions/14572015/how-to-print-to-screen-a-struct-and-all-its-content
4k views.
Prior art: Haskell language have a very simple implementation: adding after
declaration of a type "derive Show" generates a code for returning a string
with human-readable description of its object. And if a programmer wants to
tweak representation of a specific type, they override "show" function.
So, I imagine a function "_gcc_show()", and 2 attributes — one to generate a
code for a struct/class, another to override a "_gcc_show()" for certain type —
would be more than enough.
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From: "eggert at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83162] New: x86-64 -Wclobbered issuing more false alarms (regression)
Date: Sat, 25 Nov 2017 18:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83162
Bug ID: 83162
Summary: x86-64 -Wclobbered issuing more false alarms
(regression)
Product: gcc
Version: 7.2.1
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Created attachment 42717
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42717&action=edit
Test case for "gcc -O2 -S -Wclobbered" on x86-64
When building GNU Emacs we're finding that -Wclobbered is now issuing so many
false alarms that I think we will turn it off in more modules. I ran into this
problem again today, and narrowed it down to the attached program simplified
from Emacs. Compile and run it with:
gcc -O2 -S -Wclobbered clobbered.c
and GCC outputs:
clobbered.c: In function ‘module_vec_set’:
clobbered.c:22:29: warning: argument ‘vec’ might be clobbered by ‘longjmp’ or
‘vfork’ [-Wclobbered]
module_vec_set (Lisp_Object vec, long i, Lisp_Object val)
^~~
clobbered.c:22:54: warning: argument ‘val’ might be clobbered by ‘longjmp’ or
‘vfork’ [-Wclobbered]
module_vec_set (Lisp_Object vec, long i, Lisp_Object val)
^~~
Both diagnostics are bogus, since _setjmp's caller immediately returns if
_setjmp returns nonzero.
I am using gcc (GCC) 7.2.1 20170915 (Red Hat 7.2.1-2) on x86-64. I do not
observe the problem with gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-16), so it is
a regression.
Also see Bug 21161, Bug 48968, Bug 54561, Bug 61118, and Bug 65041. This
particular test case appears to be new though, as it is a regression.
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Subject: [Bug middle-end/65041] Improve -Wclobbered
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--- Comment #4 from Paul Eggert <eggert at gnu dot org> ---
Also please see Bug 83162, which may be related.
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Subject: [Bug middle-end/21161] "clobbered by longjmp" warning ignores the data flow
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Paul Eggert <eggert at gnu dot org> changed:
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--- Comment #5 from Paul Eggert <eggert at gnu dot org> ---
Also please see Bug 48968, Bug 54561, Bug 61118, Bug 65041, and Bug 83162,
which all seem to be related to this one.
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Subject: [Bug c++/83161] Feature request: add a builtin for printing structs and classes
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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>From gcc-bugs-return-583089-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 18:09:19 2017
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Subject: [Bug middle-end/48968] incorrect warning about longjmp/vfork clobbering a local (-W -O2, x86-64)
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--- Comment #11 from Paul Eggert <eggert at gnu dot org> ---
Also please see related bugs Bug 21161, Bug 54561, Bug 61118, Bug 65041, Bug
83162. Perhaps they should be merged?
>From gcc-bugs-return-583090-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 18:15:44 2017
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Subject: [Bug middle-end/61118] [6/7/8 Regression] Indirect call generated for pthread_cleanup_push with constant cleanup function
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--- Comment #14 from Paul Eggert <eggert at gnu dot org> ---
Also please see related reports Bug 21161, Bug 48968, Bug 54561, Bug 65041, and
Bug 83162. The last-listed one also is a regression, perhaps induced by the
fancier optimization in recent GCC versions. I suspect that the bugs should be
merged.
>From gcc-bugs-return-583091-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 18:56:08 2017
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Subject: [Bug c++/83161] Feature request: add a builtin for printing structs and classes
Date: Sat, 25 Nov 2017 18:56:00 -0000
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--- Comment #1 from Constantine Kharlamov <Hi-Angel at yandex dot ru> ---
Just another data point I forgot to mention:
https://stackoverflow.com/questions/3311182/linux-c-easy-pretty-dump-printout-of-structs-like-in-gdb-from-source-co
7k views. Author of this one went as far as implementing a hack with firing up
gdb from the code, getting the representation of a struct from there to a
buffer, then printing the buffer. It didn't help very much to the OP though,
because they wanted the like for kernel module.
>From gcc-bugs-return-583092-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 19:25:17 2017
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Subject: [Bug c/83117] [8 Regression] FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test for excess errors)
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
C requires that every function must be declared and called by [an expression
of] a compatible type and specifies special rules for the ellipsis and for
functions without a prototype.
For two function types to be compatible, ... If one type has a parameter type
list and the other type is specified by a function declarator that is not part
of a function definition and that contains an empty identifier list, the
parameter list shall not have an ellipsis terminator.
In the snippet in comment #2:
extern long do_test_aligned ();
static long (*const do_test_v1) (long a, ...) = (void *) do_test_aligned;
do_test_v1 (a);
do_test_aligned has an empty identifier list and do_test_v1's parameter list
ends in an ellipsis, making the two incompatible. So either the call is
undefined or the two declarations of do_test_aligned, one without a prototype
and one with (matching do_test_v1, in some other translation unit), are
undefined.
I don't know if GCC supports any targets where this incompatibility is, in
fact, undefined. If not, then perhaps the warning in this specific case should
only be issued with -Wpedantic.
In any event, I think the warning should have an option controlling it.
The phrasing could also be improved: both the established term and the
preferred English word is "incompatible" (not "non-compatible").
>From gcc-bugs-return-583093-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 19:33:32 2017
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Subject: [Bug fortran/83152] Possible run time error in derived type i/o
Date: Sat, 25 Nov 2017 19:33:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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--- Comment #2 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
By my count, you are off by one character in one of your field widths. Add a
space at the end of the lines in the input file or change format to
person_format='(a,2x,i3,2x,f4.2,1x,f3.0)'
1x, not 2x toward the end. (or maybe add a decimal point at end of lines in
input file)
I get with 1x:
$ ./a.out
Zahpod Beeblebrox 42 1.85 75.
Ford Prefect 25 1.75 65.
Arthur Dent 30 1.72 68.
Trillian 30 1.65 45.
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Subject: [Bug rtl-optimization/82488] UBSAN in gcc/expr.c:4098:17: runtime error: signed integer overflow: 0 - -9223372036854775808 cannot be represented in type 'long int'
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |trippels at gcc dot gnu.org
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
diff --git a/gcc/expr.c b/gcc/expr.c
index ee07de5aaa44..e9d8555c9452 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -4100,10 +4100,13 @@ fixup_args_size_notes (rtx_insn *prev, rtx_insn *last,
int end_args_size)
if (STACK_GROWS_DOWNWARD)
this_delta = -(unsigned HOST_WIDE_INT) this_delta;
- args_size -= this_delta;
+ if (saw_unknown)
+ args_size = INT_MIN;
+ else
+ args_size -= this_delta;
}
- return saw_unknown ? INT_MIN : args_size;
+ return args_size;
}
#ifdef PUSH_ROUNDING
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Subject: [Bug rtl-optimization/81553] [7/8 Regression] ICE in immed_wide_int_const, at emit-rtl.c:607
Date: Sat, 25 Nov 2017 19:36:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Nov 25 19:35:47 2017
New Revision: 255150
URL: https://gcc.gnu.org/viewcvs?rev=255150&root=gcc&view=rev
Log:
PR rtl-optimization/81553
* combine.c (simplify_if_then_else): In (if_then_else COND (OP Z C1) Z)
to (OP Z (mult COND (C1 * STORE_FLAG_VALUE))) optimization, if OP
is a shift where C1 has different mode than the whole shift, use C1's
mode for MULT rather than the shift's mode.
* gcc.c-torture/compile/pr81553.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr81553.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug bootstrap/67137] --enable-languages=jit and --disable-shared
Date: Sat, 25 Nov 2017 20:00:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-25
Ever confirmed|0 |1
Known to fail| |6.4.0, 7.2.0, 8.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with today's top of trunk (GCC 8.0). No change since 6.0.
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Subject: [Bug jit/64296] link failure of libgccjit.so for "in tree" gmp/mpc/mpfr/isl
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Known to fail|6.0 |6.4.0, 7.2.0, 8.0
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
No change since 6.0.
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Subject: [Bug target/83156] [8 regression] gcc.target/i386/pr82361-1.c fail
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-25
Assignee|unassigned at gcc dot gnu.org |segher at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Ah, I see what is happening -- there are REG_UNUSED notes here that do
not refer to a SET (to a CLOBBER, instead). Shouldn't be hard to fix :-)
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Subject: [Bug target/83156] [8 regression] gcc.target/i386/pr82361-1.c fail
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Hrm, looking for a REG_UNUSED of the dests (instead of of anything)
fixes f1 and f2, but not the rest.
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Subject: [Bug bootstrap/83163] New: bootstrap comparison failure with --enable-languages=all,jit
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Bug ID: 83163
Summary: bootstrap comparison failure with
--enable-languages=all,jit
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
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Target Milestone: ---
Today's top of trunk (GCC 8.0) fails to bootstrap fails with the error below
when configured with --enable-languages=all,jit --enable-host-shared
--enable-checking=release
make[3]: Leaving directory '/opt/notnfs/msebor/build/gcc-git'
Comparing stages 2 and 3
warning: gcc/cc1objplus-checksum.o differs
warning: gcc/cc1obj-checksum.o differs
Bootstrap comparison failure!
gcc/combine.o differs
Makefile:27134: recipe for target 'compare' failed
make[2]: *** [compare] Error 1
make[2]: Leaving directory '/opt/notnfs/msebor/build/gcc-git'
Makefile:27113: recipe for target 'stage3-bubble' failed
make[1]: *** [stage3-bubble] Error 2
make[1]: Leaving directory '/opt/notnfs/msebor/build/gcc-git'
Makefile:27176: recipe for target 'bootstrap' failed
make: *** [bootstrap] Error 2
make: Leaving directory '/opt/notnfs/msebor/build/gcc-git'
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Subject: [Bug middle-end/48968] incorrect warning about longjmp/vfork clobbering a local (-W -O2, x86-64)
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=54561,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=83162
--- Comment #12 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Paul Eggert from comment #11)
> Also please see related bugs Bug 21161, Bug 54561, Bug 61118, Bug 65041, Bug
> 83162. Perhaps they should be merged?
Sure, but into which one?
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Subject: [Bug middle-end/61118] [6/7/8 Regression] Indirect call generated for pthread_cleanup_push with constant cleanup function
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=54561,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=83162
--- Comment #15 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Paul Eggert from comment #14)
> Also please see related reports Bug 21161, Bug 48968, Bug 54561, Bug 65041,
> and Bug 83162. The last-listed one also is a regression, perhaps induced by
> the fancier optimization in recent GCC versions. I suspect that the bugs
> should be merged.
I can merge them once we choose which of them to use as the base bug.
>From gcc-bugs-return-583103-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 25 22:02:42 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/81553] [7 Regression] ICE in immed_wide_int_const, at emit-rtl.c:607
Date: Sat, 25 Nov 2017 22:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8 Regression] ICE in |[7 Regression] ICE in
|immed_wide_int_const, at |immed_wide_int_const, at
|emit-rtl.c:607 |emit-rtl.c:607
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-583104-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 00:02:52 2017
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Subject: [Bug tree-optimization/80776] -Wformat-overflow false positive for %d on integer bounded by __builtin_unreachable
Date: Sun, 26 Nov 2017 00:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80776
--- Comment #3 from Paul Eggert <eggert at gnu dot org> ---
(In reply to Richard Biener from comment #1)
> Possibly the walk in remove_range_assertions visits the latter before the
> former block but in principle we do have code to handle this there.
I just ran into the same problem again, with the following code derived from
GNU Emacs, and it suggests that your diagnosis is correct. Perhaps this can be
used in a test case once the bug is fixed. If I remove the "if (! (0 <= i))
__builtin_unreachable ();" the bogus warning goes away, which suggests that the
earlier test is hiding the later one somehow. This is with GCC 7.2.1 20170915
(Red Hat 7.2.1-2) on x86-64.
extern __inline __attribute__ ((__always_inline__)) __attribute__
((__gnu_inline__)) __attribute__ ((__artificial__)) int
__attribute__ ((__nothrow__ , __leaf__)) sprintf (char *__restrict __s, const
char *__restrict __fmt, ...)
{
return __builtin___sprintf_chk (__s, 2 - 1,
__builtin_object_size (__s, 2 > 1), __fmt, __builtin_va_arg_pack ());
}
char number[sizeof "999999"];
int somerandom (void);
void
Foo (void)
{
int i = somerandom ();
if (! (0 <= i))
__builtin_unreachable ();
if (! (0 <= i && i <= 999999))
__builtin_unreachable ();
sprintf (number, "%d", i);
}
$ gcc -Wformat-overflow -O2 -S v.i
v.i: In function ‘Foo’:
v.i:17:21: warning: ‘%d’ directive writing between 1 and 10 bytes into a region
of size 7 [-Wformat-overflow=]
sprintf (number, "%d", i);
^~
v.i:17:20: note: directive argument in the range [0, 2147483647]
sprintf (number, "%d", i);
^~~~
v.i:4:10: note: ‘__builtin___sprintf_chk’ output between 2 and 11 bytes into a
destination of size 7
return __builtin___sprintf_chk (__s, 2 - 1,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
__builtin_object_size (__s, 2 > 1), __fmt, __builtin_va_arg_pack ());
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Subject: [Bug middle-end/83164] New: [8 regression] internal compiler error: verify_gimple failed
Date: Sun, 26 Nov 2017 00:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83164
Bug ID: 83164
Summary: [8 regression] internal compiler error: verify_gimple
failed
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
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CC: marc.glisse at normalesup dot org
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Host: i586-unknown-freebsd10.4
Created attachment 42718
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42718&action=edit
Preprocessed source file
This one's easy to reproduce, no specific compiler options are required:
% $GCC -c -o ddeml.o ddeml.i
ddeml.c: In function ‘DDEML_AddThunk’:
ddeml.c:181:28: error: type mismatch in pointer diff expression
static struct ddeml_thunk* DDEML_AddThunk(DWORD instId, DWORD pfn16)
^~~~~~~~~~~~~~
int
struct HDDEDATA__ * (*<T1c96>) (DWORD, UINT, UINT, struct HCONV__ *, struct
HSZ__ *, struct HSZ__ *, struct HDDEDATA__ *, ULONG_PTR, ULONG_PTR)
DWORD *
_6 = WDML_InvokeCallback16 - _5;
ddeml.c:181:28: internal compiler error: verify_gimple failed
Also the diagnostics look quite odd, don't they?
I believe this was introduced by the following?
2017-10-28 Marc Glisse <marc.glisse@inria.fr>
gcc/c/
* c-fold.c (c_fully_fold_internal): Handle POINTER_DIFF_EXPR.
* c-typeck.c (pointer_diff): Use POINTER_DIFF_EXPR.
gcc/c-family/
* c-pretty-print.c (pp_c_additive_expression,
c_pretty_printer::expression): Handle POINTER_DIFF_EXPR.
gcc/cp/
* constexpr.c (cxx_eval_constant_expression,
potential_constant_expression_1): Handle POINTER_DIFF_EXPR.
* cp-gimplify.c (cp_fold): Likewise.
* error.c (dump_expr): Likewise.
* typeck.c (pointer_diff): Use POINTER_DIFF_EXPR.
>From gcc-bugs-return-583106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 00:20:53 2017
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Subject: [Bug middle-end/83164] [8 regression] internal compiler error: verify_gimple failed
Date: Sun, 26 Nov 2017 00:20:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-26
Ever confirmed|0 |1
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
void b() { long a = (char *)b - (char *)1; }
ddeml.i: In function 'b':
ddeml.i:1:6: error: type mismatch in pointer diff expression
void b() { long a = (char *)b - (char *)1; }
^
long int
void (*<T2f9>) ()
char *
a = b - 1B;
ddeml.i:1:6: internal compiler error: verify_gimple failed
0xdafba4 verify_gimple_in_seq(gimple*)
/home/glisse/repos/gcc/trunk/gcc/tree-cfg.c:5094
0xb534ae gimplify_body(tree_node*, bool)
/home/glisse/repos/gcc/trunk/gcc/gimplify.c:12606
0xb5369d gimplify_function_tree(tree_node*)
/home/glisse/repos/gcc/trunk/gcc/gimplify.c:12696
0x9ddb4f cgraph_node::analyze()
/home/glisse/repos/gcc/trunk/gcc/cgraphunit.c:670
0x9e0765 analyze_functions
/home/glisse/repos/gcc/trunk/gcc/cgraphunit.c:1131
0x9e1432 symbol_table::finalize_compilation_unit()
/home/glisse/repos/gcc/trunk/gcc/cgraphunit.c:2690
>From gcc-bugs-return-583107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 00:35:31 2017
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Subject: =?UTF-8?B?W0J1ZyBjKysvODMxNjVdIE5ldzogWzggcmVncmVzc2lvbl0gY2Fubm90IGNv?= =?UTF-8?B?bnZlcnQg4oCYR1ByaXZhdGXigJkge2FrYSDigJhfR1ByaXZhdGXigJl9IHRv?= =?UTF-8?B?IOKAmEdQcml2YXRlKuKAmSB7YWthIOKAmF9HUHJpdmF0ZSrigJl9IGluIHJl?= =?UTF-8?B?dHVybg==?Date: Sun, 26 Nov 2017 00:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83165
Bug ID: 83165
Summary: [8 regression] cannot convert ‘GPrivate’ {aka
‘_GPrivate’} to ‘GPrivate*’ {aka ‘_GPrivate*’} in
return
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: skpgkp1 at gmail dot com
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This issue appear in clipsmm build with gcc 8. gcc 7.2.1 build work fine.
$ cat environment.i.cpp
typedef struct _GPrivate GPrivate;
struct _GPrivate {};
template <class> class a {
GPrivate *b() { return c; }
GPrivate c;
};
### Fail with GCC 8.0
$g++ --version
g++ (GCC) 8.0.0 20171124 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$g++ -pthread -g -O2 -std=c++0x -c environment.i.cpp -fPIC -o
environment.i.cpp.o
environment.i.cpp: In member function ‘GPrivate* a< <template-parameter-1-1>
>::b()’:
environment.i.cpp:4:26: error: cannot convert ‘GPrivate’ {aka ‘_GPrivate’} to
‘GPrivate*’ {aka ‘_GPrivate*’} in return
GPrivate *b() { return c; }
^
### Pass with GCC 7.2.1
$g++ --version
g++ (GCC) 7.2.1 20171124
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$g++ -pthread -g -O2 -std=c++0x -c environment.i.cpp -fPIC -o
environment.i.cpp.o
$ echo $?
0
>From gcc-bugs-return-583108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 00:45:35 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83166] New: [8 regression] error: type mismatch in pointer diff expression internal compiler error: verify_gimple failed
Date: Sun, 26 Nov 2017 00:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83166
Bug ID: 83166
Summary: [8 regression] error: type mismatch in pointer diff
expression internal compiler error: verify_gimple
failed
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: skpgkp1 at gmail dot com
Target Milestone: ---
This issue appear in dmtcp build with GCC 8.0. GCC 7.2.1 works fine.
$ cat mtcp_restart.i.c
char a;
b() { long c = (char *)b - &a; }
### Fail with GCC 8.0
$gcc --version
gcc (GCC) 8.0.0 20171124 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$gcc -g -O2 -c -o mtcp_restart.i.c.o -fPIC -fno-stack-protector -g -O0
mtcp_restart.i.c
mtcp_restart.i.c:2:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
b() { long c = (char *)b - &a; }
^
mtcp_restart.i.c: In function ‘b’:
mtcp_restart.i.c:2:1: error: type mismatch in pointer diff expression
long int
int (*<T2f9>) ()
char *
c = b - &a;
mtcp_restart.i.c:2:1: internal compiler error: verify_gimple failed
0xd4a52d verify_gimple_in_seq(gimple*)
../../gcc-main.3O1G/gcc/tree-cfg.c:5094
0xb00bdd gimplify_body(tree_node*, bool)
../../gcc-main.3O1G/gcc/gimplify.c:12606
0xb00dc4 gimplify_function_tree(tree_node*)
../../gcc-main.3O1G/gcc/gimplify.c:12696
0x998d47 cgraph_node::analyze()
../../gcc-main.3O1G/gcc/cgraphunit.c:670
0x99b835 analyze_functions
../../gcc-main.3O1G/gcc/cgraphunit.c:1131
0x99c412 symbol_table::finalize_compilation_unit()
../../gcc-main.3O1G/gcc/cgraphunit.c:2690
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
### Pass with GCC 7.2.1
$gcc --version
gcc (GCC) 7.2.1 20171124
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$gcc -g -O2 -c -o mtcp_restart.i.c.o -fPIC -fno-stack-protector -g -O0
mtcp_restart.i.c
mtcp_restart.i.c:2:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
b() { long c = (char *)b - &a; }
^
$ echo $?
0
>From gcc-bugs-return-583109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 00:49:59 2017
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Subject: [Bug middle-end/83164] [8 regression] internal compiler error: verify_gimple failed
Date: Sun, 26 Nov 2017 00:49:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
Does it work if you remove the verification
|| !types_compatible_p (rhs1_type, rhs2_type)
from tree-cfg.c?
useless_type_conversion_p says that converting a function pointer to char* is
useless (but the reverse isn't), so we can't guarantee types_compatible_p.
>From gcc-bugs-return-583110-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 00:52:29 2017
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Subject: [Bug c++/83166] [8 regression] error: type mismatch in pointer diff expression internal compiler error: verify_gimple failed
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 83164 ***
>From gcc-bugs-return-583111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 00:52:29 2017
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Subject: [Bug middle-end/83164] [8 regression] internal compiler error: verify_gimple failed
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CC| |skpgkp1 at gmail dot com
--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
*** Bug 83166 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-583112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 01:05:27 2017
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Could you explain why this code should be accepted, to save time?
>From gcc-bugs-return-583113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 01:08:10 2017
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note since GPrivate is non dependent type checking can happen at defintion time
rather than instaination time.
>From gcc-bugs-return-583114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 01:16:59 2017
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--- Comment #3 from Sunil Pandey <skpgkp1 at gmail dot com> ---
Well, this is creduce generated code from clipsmm application build file.
https://sourceforge.net/projects/clipsmm/
If you want, I can attach original preprocessed file.
>From gcc-bugs-return-583115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 02:20:24 2017
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Subject: [Bug testsuite/83155] [8 regression] test-error-array-bounds.c.exe fail
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Component|jit |testsuite
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=64296,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=67137,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=83163
Assignee|dmalcolm at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Thanks for fixing it, David. I don't normally build jit, in part because
--enable-languages=all doesn't enable it, but mainly because of
pr67137/pr64296, so I missed this failure. I tried to see if I could get past
the bootstrap problems mentioned there but ran into pr83163. Not sure what's
going on there but I think this bug can be resolved as fixed.
>From gcc-bugs-return-583116-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 02:32:29 2017
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Subject: [Bug c/81851] missing -Wduplicated-branches on if and return statements with no else
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----------------------------------------------------------------------------
Status|WAITING |UNCONFIRMED
Ever confirmed|1 |0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
There is no difference between functions f() and g() in comment #0. The source
code in both is equivalent (and the latter is frequently preferred to the
former) and the emitted object code is identical. So irrespective of whether
or not both were considered in the implementation of the warning, I can't think
of a justification for diagnosing only one and not the other that would be
helpful to users. (If there is one, what is it?)
>From gcc-bugs-return-583117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 05:29:41 2017
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |trippels at gcc dot gnu.org
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--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
The error is correct. Not a bug.
>From gcc-bugs-return-583118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 07:07:24 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83117] [8 Regression] FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test for excess errors)
Date: Sun, 26 Nov 2017 07:07:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The warning is nothing new, GCC has been warning for that for years. What my
patch did is just better optimization, so the compiler can see the UB.
Try:
extern long do_test_aligned ();
static long (*const do_test_v1) (long a, ...) = (void *) do_test_aligned;
extern void check_results (long);
int test (long a)
{
long ret;
ret = do_test_v1 (a);
ret += (long (*) (long a, ...)) do_test_aligned;
check_results (ret);
}
We've warned about the latter, but not the former, since we weren't able to
fold a const var to its initializer.
So, either the tests shouldn't use const on these, something like:
- out << "static __attribute__ ((ms_abi)) long (*const do_test_"
+ out << "static __attribute__ ((ms_abi)) long (*do_test_"
or they should use const volatile, or -w, or should use proper prototypes.
Daniel needs to decide what to do, it isn't obviously clear what the intent is.
>From gcc-bugs-return-583119-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 07:40:39 2017
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Subject: [Bug c/83117] [8 Regression] FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test for excess errors)
Date: Sun, 26 Nov 2017 07:40:00 -0000
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--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On November 26, 2017 8:07:10 AM GMT+01:00, "jakub at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83117
>
>--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
>The warning is nothing new, GCC has been warning for that for years.
>What my
>patch did is just better optimization, so the compiler can see the UB.
>
>Try:
>extern long do_test_aligned ();
>
>static long (*const do_test_v1) (long a, ...) = (void *)
>do_test_aligned;
>
>extern void check_results (long);
>
>int test (long a)
>{
> long ret;
>
> ret = do_test_v1 (a);
> ret += (long (*) (long a, ...)) do_test_aligned;
> check_results (ret);
>}
>
>We've warned about the latter, but not the former, since we weren't
>able to
>fold a const var to its initializer.
>
>So, either the tests shouldn't use const on these, something like:
>- out << "static __attribute__ ((ms_abi)) long (*const
>do_test_"
>+ out << "static __attribute__ ((ms_abi)) long (*do_test_"
>or they should use const volatile, or -w, or should use proper
>prototypes.
>
>Daniel needs to decide what to do, it isn't obviously clear what the
>intent is.
The intent of the test was probably to force an indirect call.
>From gcc-bugs-return-583120-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 09:50:32 2017
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Subject: [Bug target/83143] [SH]: Assembler messages: invalid operands (*UND* and .text sections) for `-'
Date: Sun, 26 Nov 2017 09:50:00 -0000
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--- Comment #8 from James Clarke <jrtc27 at jrtc27 dot com> ---
Created attachment 42719
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42719&action=edit
Reduced reproduction.
This is a reduced version of the original reproduction. Creduce will happily
make it even smaller if you let it do crazy enum-to-pointer casts and various
other warning-inducing things, but this builds with -Wall -Werror.
>From gcc-bugs-return-583121-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 10:04:43 2017
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Subject: [Bug fortran/83076] [8 Regression] ICE in gfc_deallocate_scalar_with_status, at fortran/trans.c:1598
Date: Sun, 26 Nov 2017 10:04:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Yes, indeed it was the main part of my patch. I cannot see at the moment,
though, why forcing the creation of a vtable is having this effect on caf in
deallocate.
The call to gfc_caf_attr at trans-stmt.c:6644 is detecting that the component
does not have attr.coarray_comp set so that is_coarray_array does not get set a
few lines later and the wrong branch is taken at line 6661. Setting the latter
flag in gdb at line 6651 allows the compilation to complete successfully.
Why a call to gfc_find_derived_vtab should have this effect is not evident to
me at the moment. I'll take it though.
Thanks for the heads up, Jakub.
Paul
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Subject: [Bug middle-end/83164] [8 regression] internal compiler error: verify_gimple failed
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--- Comment #4 from Gerald Pfeifer <gerald at pfeifer dot com> ---
(In reply to Marc Glisse from comment #2)
> Does it work if you remove the verification
>
> || !types_compatible_p (rhs1_type, rhs2_type)
>
> from tree-cfg.c?
Yes, I just tried this.
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Subject: [Bug target/83143] [SH]: Assembler messages: invalid operands (*UND* and .text sections) for `-'
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--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
What flags does it need? I can't get it to fail.
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Subject: [Bug target/83143] [SH]: Assembler messages: invalid operands (*UND* and .text sections) for `-'
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--- Comment #10 from James Clarke <jrtc27 at jrtc27 dot com> ---
(In reply to Segher Boessenkool from comment #9)
> What flags does it need? I can't get it to fail.
Just -O2 -fPIC, at least with 7.2.0.
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--- Comment #11 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to James Clarke from comment #10)
> (In reply to Segher Boessenkool from comment #9)
> > What flags does it need? I can't get it to fail.
>
> Just -O2 -fPIC, at least with 7.2.0.
That is, if your default configuration is sh4-linux. Otherwise you might need
to specify all the parameters. AFAIR it's -ml -m4 -matomic-model=soft-gusa
>From gcc-bugs-return-583126-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 11:02:17 2017
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Subject: [Bug target/83143] [SH]: Assembler messages: invalid operands (*UND* and .text sections) for `-'
Date: Sun, 26 Nov 2017 11:02:00 -0000
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--- Comment #12 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Yes I use sh4-linux, but trunk (not 7). Will try 7 later.
>From gcc-bugs-return-583127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 11:14:23 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83152] Possible run time error in derived type i/o
Date: Sun, 26 Nov 2017 11:14:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> By my count, you are off by one character in one of your field widths.
> Add a space at the end of the lines in the input file or change format to
>
> person_format='(a,2x,i3,2x,f4.2,1x,f3.0)'
>
> 1x, not 2x toward the end. (or maybe add a decimal point at end of lines
> in input file)
The code works if I replace ch3701_input_file.txt with
Zahpod Beeblebrox 42 1.85 75.
Ford Prefect 25 1.75 65.
Arthur Dent 30 1.72 68.
Trillian 30 1.65 45.
IMO this PR should be resolved as INVALID.
>From gcc-bugs-return-583128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 11:19:45 2017
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Subject: [Bug fortran/83153] Possible run time error in derived type io example - 2
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The code works with the fixes in pr83152 comments 2 and 3. Marking as
duplicate.
*** This bug has been marked as a duplicate of bug 83152 ***
>From gcc-bugs-return-583129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 11:19:45 2017
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Subject: [Bug fortran/83152] Possible run time error in derived type i/o
Date: Sun, 26 Nov 2017 11:19:00 -0000
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 83153 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-583130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 11:21:17 2017
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From: "l.lunak at centrum dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83145] Ambiguous overload with templates, only GCC7 C++17 mode (regression?)
Date: Sun, 26 Nov 2017 11:21:00 -0000
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--- Comment #3 from Luboš Luňák <l.lunak at centrum dot cz> ---
You are right, it is controlled by the -fnew-ttp-matching option. But while I
admit I have a problem deciphering what the referenced paper says in practice
or how it exactly applies to this case, this still looks broken to me. Consider
the following case, which is the original reduced to just one template argument
instead of 3:
=====
template <typename... TValues>
class Variant {
};
class BinaryOutputStream {
};
template <typename... TValues>
BinaryOutputStream& operator<<(BinaryOutputStream& stream, const
Variant<TValues...>& /*variant*/) {
return stream;
}
template <template <typename T> class TCollection,
typename T>
BinaryOutputStream& operator<<(BinaryOutputStream& ostream, const
TCollection<T>& /*arr*/) {
return ostream;
}
int main()
{
Variant<float> variant;
BinaryOutputStream stream;
stream << variant;
return 0;
}
=====
That still triggers the error. Now remove the use of the variadic template
(i.e. remove those 3 cases of "..."), and now it compiles just fine.
Why should the use of a variadic template make any difference here? To me the
Variant overload looks like an obviously better match in both cases.
>From gcc-bugs-return-583131-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 11:35:37 2017
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Subject: [Bug c++/83167] New: decltype((x)) inside lambda is considered odr-use if x is not a reference
Date: Sun, 26 Nov 2017 11:35:00 -0000
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Bug ID: 83167
Summary: decltype((x)) inside lambda is considered odr-use if x
is not a reference
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: deaeod at gmail dot com
Target Milestone: ---
https://godbolt.org/g/NmA3ZP
#include <type_traits>
int main() {
int x = 1;
int&& y = static_cast<int&&>(x);
auto A = []{ static_assert(std::is_same_v<decltype((x)), int&>); };
auto B = [=]{ static_assert(std::is_same_v<decltype((x)), int&>); };
auto C = []{ static_assert(std::is_same_v<decltype((y)), int&>); };
auto D = [=]{ static_assert(std::is_same_v<decltype((y)), int&>); };
}
I expected this to compile cleanly, but static asserts A and B fail under g++.
A fails because x wasnt captured and B fails because the deduced type is const
int&.
Here is how i would argue for my expectation:
http://eel.is/c++draft/expr.prim.lambda#capture-11.sentence-3
-- "An id-expression that is not an odr-use refers to the original entity,
never to a member of the closure type."
http://eel.is/c++draft/basic.def.odr#def:potentially_evaluated
-- "An expression is potentially evaluated unless it is an unevaluated
operand or a subexpression thereof."
http://eel.is/c++draft/basic.def.odr#def:odr-used
-- "A variable x whose name appears as a potentially-evaluated expression
ex is odr-used by ex unless [...]"
http://eel.is/c++draft/dcl.type.simple#4.sentence-3
-- "The operand of the decltype specifier is an unevaluated operand."
>From gcc-bugs-return-583132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 12:11:25 2017
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Subject: [Bug c++/66672] std::is_same wrong result for captured reference value inside a lambda
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Lukas <deaeod at gmail dot com> changed:
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CC| |deaeod at gmail dot com
--- Comment #2 from Lukas <deaeod at gmail dot com> ---
I think gcc's result of 10 is correct, and i believe every other compiler is
wrong.
Consider the following passages:
http://eel.is/c++draft/expr.prim.lambda#capture-11.sentence-3
-- "An id-expression that is not an odr-use refers to the original entity,
never to a member of the closure type."
http://eel.is/c++draft/basic.def.odr#def:potentially_evaluated
-- "An expression is potentially evaluated unless it is an unevaluated
operand or a subexpression thereof."
http://eel.is/c++draft/basic.def.odr#def:odr-used
-- "A variable x whose name appears as a potentially-evaluated expression
ex is odr-used by ex unless [...]"
http://eel.is/c++draft/dcl.type.simple#4.sentence-3
-- "The operand of the decltype specifier is an unevaluated operand."
Combining (1) and (3) means that variable names refer to the original entity,
not the member of the closure, unless that variable name appears in a
potentially evaluated expression.
(2) and (4) combined say that the operand of decltype is not a potentially
evaluated expression.
Thus, variable names inside a decltype expression always refer to the outside
entities.
>From gcc-bugs-return-583133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 12:25:17 2017
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83021] [7/8 Regression] gfortran segfault in polymorphic assignment
Date: Sun, 26 Nov 2017 12:25:00 -0000
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--- Comment #9 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Does the reproducer in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83042
maybe help to fix this bug? At the moment our usage of the gcc trunk is frozen
as we cannot work around the many cases where it occurs.
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Subject: [Bug fortran/83021] [7/8 Regression] gfortran segfault in polymorphic assignment
Date: Sun, 26 Nov 2017 13:46:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #10 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 42720
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42720&action=edit
A fix for this PR
This fixes the problem and boostraps/regtests OK.
Paul
>From gcc-bugs-return-583135-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 13:48:03 2017
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Subject: [Bug fortran/83042] [7/8 regression] ICE on valid code
Date: Sun, 26 Nov 2017 13:48:00 -0000
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--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 42721
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42721&action=edit
A fix for this PR and PR83021
A fix for this PR
This fixes the problem and boostraps/regtests OK.
Paul
>From gcc-bugs-return-583136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 13:58:07 2017
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Subject: =?UTF-8?B?W0J1ZyBjKysvODMxNjBdIFs4IHJlZ3Jlc3Npb25dIGx2YWx1ZSByZXF1aXJl?= =?UTF-8?B?ZCBhcyB1bmFyeSDigJgm4oCZIG9wZXJhbmQ=?Date: Sun, 26 Nov 2017 13:58:00 -0000
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Daniel Krügler <daniel.kruegler at googlemail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |daniel.kruegler@googlemail.
| |com
--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
The example looks invalid to me according to [expr.prim.lambda.capture] p7 b
(7.1), because the local variable bj is odr-used in the lambda expression
[](int bk) { a::ac(bk, bj); };
This is so, because the called function template
template <typename b> void ac(b, const b &);
attempts to bind its second argument by reference.
>From gcc-bugs-return-583137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 14:35:02 2017
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Subject: [Bug fortran/83076] [8 Regression] ICE in gfc_deallocate_scalar_with_status, at fortran/trans.c:1598
Date: Sun, 26 Nov 2017 14:35:00 -0000
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--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Paul Thomas from comment #3)
> Yes, indeed it was the main part of my patch. I cannot see at the moment,
> though, why forcing the creation of a vtable is having this effect on caf in
> deallocate.
>
> The call to gfc_caf_attr at trans-stmt.c:6644 is detecting that the
> component does not have attr.coarray_comp set so that is_coarray_array does
> not get set a few lines later and the wrong branch is taken at line 6661.
> Setting the latter flag in gdb at line 6651 allows the compilation to
> complete successfully.
>
> Why a call to gfc_find_derived_vtab should have this effect is not evident
> to me at the moment. I'll take it though.
>
> Thanks for the heads up, Jakub.
>
> Paul
When I revert the patch for pr81447 (r254427) the testcase here compiles.
However, adding a class declaration triggers the same problem:
module m
type t
integer, pointer :: z
end type
class(t), allocatable :: c ! <= This triggers the same problem.
contains
function f(x)
type(t) :: x[*]
if ( associated(x%z) ) deallocate(x%z)
end
end
Hence, I would say that it is a pre-existing problem that has been exposed by
the fix for r254427 and is not really a regression.
Paul
>From gcc-bugs-return-583138-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 14:49:08 2017
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Subject: [Bug fortran/83076] [8 Regression] ICE in gfc_deallocate_scalar_with_status, at fortran/trans.c:1598
Date: Sun, 26 Nov 2017 14:49:00 -0000
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Hence, I would say that it is a pre-existing problem that has been exposed
> by the fix for r254427 and is not really a regression.
Still a regression [78 Regression], likely caused by r243021.
>From gcc-bugs-return-583139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 15:06:22 2017
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Subject: [Bug fortran/83154] ICE: associate and coarrays
Date: Sun, 26 Nov 2017 15:06:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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CC| |pault at gcc dot gnu.org
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The change occurred between revisions r252781 (2017-09-15, errors) and r253041
+ one patch (2017-09-20, ICE), likely r253077.
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Subject: [Bug libfortran/83168] New: FAIL: gfortran.dg/fmt_f0_2.f90 with a sanitized libgfortran
Date: Sun, 26 Nov 2017 15:43:00 -0000
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Bug ID: 83168
Summary: FAIL: gfortran.dg/fmt_f0_2.f90 with a sanitized
libgfortran
Product: gcc
Version: unknown
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The test FAIL: gfortran.dg/fmt_f0_2.f90 fails with a sanitized libgfortran.
Compiling the reduced test
character(10000) :: str
write(str, "(f0.0)") -huge(real(1.0,kind=8))
print *, len(trim(str))
end
gives
==61211==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x6120000002f7 at pc 0x00010fb72c53 bp 0x7ffee0ba8e90 sp 0x7ffee0ba8e88
WRITE of size 1 at 0x6120000002f7 thread T0
#0 0x10fb72c52 in build_float_string write_float.def:665
#1 0x10fb73ff0 in get_float_string write_float.def:1068
#2 0x10fb76bd1 in write_float_0 write.c:1596
#3 0x10fb791c9 in _gfortrani_write_f write.c:1623
#4 0x10fb47d28 in formatted_transfer_scalar_write transfer.c:2041
#5 0x10fb4aae9 in formatted_transfer transfer.c:2279
#6 0x10fb3366e in _gfortran_transfer_real transfer.c:2310
#7 0x10fb336a3 in _gfortran_transfer_real_write transfer.c:2316
#8 0x10f053d9e in MAIN__ (a.out:x86_64+0x100000d9e)
#9 0x10f053e98 in main (a.out:x86_64+0x100000e98)
#10 0x7fff59553144 in start (libdyld.dylib:x86_64+0x1144)
0x6120000002f7 is located 0 bytes to the right of 311-byte region
[0x6120000001c0,0x6120000002f7)
allocated by thread T0 here:
#0 0x11181de8d in wrap_malloc sanitizer_malloc_mac.inc:135
#1 0x10f05a6e7 in _gfortrani_xmalloc memory.c:42
#2 0x10fb6b522 in select_string write.c:1557
#3 0x10fb76b46 in write_float_0 write.c:1592
#4 0x10fb791c9 in _gfortrani_write_f write.c:1623
#5 0x10fb47d28 in formatted_transfer_scalar_write transfer.c:2041
#6 0x10fb4aae9 in formatted_transfer transfer.c:2279
#7 0x10fb3366e in _gfortran_transfer_real transfer.c:2310
#8 0x10fb336a3 in _gfortran_transfer_real_write transfer.c:2316
#9 0x10f053d9e in MAIN__ (a.out:x86_64+0x100000d9e)
#10 0x10f053e98 in main (a.out:x86_64+0x100000e98)
#11 0x7fff59553144 in start (libdyld.dylib:x86_64+0x1144)
SUMMARY: AddressSanitizer: heap-buffer-overflow write_float.def:665 in
build_float_string
Shadow bytes around the buggy address:
0x1c2400000000: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x1c2400000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x1c2400000020: 00 00 00 00 00 00 00 00 00 00 fa fa fa fa fa fa
0x1c2400000030: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x1c2400000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x1c2400000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00[07]fa
0x1c2400000060: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x1c2400000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x1c2400000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fa
0x1c2400000090: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x1c24000000a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==61211==ABORTING
The result is the same for the KIND=10 and KIND=16 variants.
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Subject: [Bug libfortran/83168] FAIL: gfortran.dg/fmt_f0_2.f90 with a sanitized libgfortran
Date: Sun, 26 Nov 2017 16:23:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-26
CC| |jvdelisle at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jvdelisle at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
I will look into this. What does this mean:
is located 0 bytes to the right of 311-byte region
[0x6120000001c0,0x6120000002f7)
0 bytes?
>From gcc-bugs-return-583142-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 16:44:38 2017
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Subject: [Bug libfortran/83168] FAIL: gfortran.dg/fmt_f0_2.f90 with a sanitized libgfortran
Date: Sun, 26 Nov 2017 16:44:00 -0000
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--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
The first byte just outside the valid range.
>From gcc-bugs-return-583143-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 17:08:48 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/83168] FAIL: gfortran.dg/fmt_f0_2.f90 with a sanitized libgfortran
Date: Sun, 26 Nov 2017 17:08:00 -0000
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--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Thanks,
Try this fix:
diff --git a/libgfortran/io/write.c b/libgfortran/io/write.c
index c9aad150..d26358c0 100644
--- a/libgfortran/io/write.c
+++ b/libgfortran/io/write.c
@@ -1552,7 +1552,7 @@ select_string (st_parameter_dt *dtp, const fnode *f, char
*buf, size_t *size,
int kind)
{
char *result;
- *size = size_from_kind (dtp, f, kind) + f->u.real.d;
+ *size = size_from_kind (dtp, f, kind) + f->u.real.d + 1;
if (*size > BUF_STACK_SZ)
result = xmalloc (*size);
else
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From: "ibuclaw at gdcproject dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83169] New: Optimizer doesn't correctly handle NRVO if -fno-inline-small-functions or function uninlinable
Date: Sun, 26 Nov 2017 17:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83169
Bug ID: 83169
Summary: Optimizer doesn't correctly handle NRVO if
-fno-inline-small-functions or function uninlinable
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
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Reporter: ibuclaw at gdcproject dot org
Target Milestone: ---
Minimal test.
---
#include <assert.h>
struct Stest
{
int foo[5]; // Triggers NRVO return on x86_64.
};
void* ptest;
Stest footest()
{
Stest data = {}; // <retval> = {};
ptest = &data; // ptest = &<retval>;
return data; // return <retval>
}
int main()
{
const Stest data = footest(); // data = footest ();
// [return slot optimization]
assert(ptest == &data);
return 0;
}
---
And permutation of compile-time switches, "PASSES" indicates that runtime exits
without assertion failure.
---
* g++ -O0 (PASSES)
* g++ -O1 (FAILS)
* g++ -O1 -finline-small-functions (PASSES)
* g++ -O2 (PASSES)
* g++ -O2 -fno-inline-small-functions (FAILS)
* g++ -O2 -fPIC (FAILS)
Looking at the optimized tree dump, for -O2 the compiler determines (I think
correctly) that ptest and data share the same address, and so removes the
assert.
---
main ()
{
const struct Stest data;
<bb 2> [local count: 10000]:
ptest = &data;
data ={v} {CLOBBER};
return 0;
}
---
However for -O2 -fPIC:
---
main ()
{
static const char __PRETTY_FUNCTION__[11] = "int main()";
const struct Stest data;
<bb 2> [local count: 10000]:
data = footest (); [return slot optimization]
__assert_fail ("ptest == &data", "test.cc", 20, &__PRETTY_FUNCTION__);
}
---
And for -O1:
---
main ()
{
static const char __PRETTY_FUNCTION__[11] = "int main()";
const struct Stest data;
<bb 2> [local count: 10000]:
data = {};
ptest = &data;
__assert_fail ("ptest == &data", "test.cc", 20, &__PRETTY_FUNCTION__);
}
---
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83169] Optimizer doesn't correctly handle NRVO if -fno-inline-small-functions or function uninlinable
Date: Sun, 26 Nov 2017 18:04:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This code is all undefined so what do you expect?
>From gcc-bugs-return-583146-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 18:36:51 2017
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From: "ibuclaw at gdcproject dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83169] Optimizer doesn't correctly handle NRVO if -fno-inline-small-functions or function uninlinable
Date: Sun, 26 Nov 2017 18:36:00 -0000
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--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
A little bit of consistency?
This was found in another language where NRVO is consistency expected to
happen. Having a quick look at bug 58055, seems to suggest that front-end
should generate better codegen if the optimizer doesn't understand the intent.
I wonder what Ada does, but I'd like to avoid doing something complex such as
generating a hidden parameter to store the result.
e.g:
---
Stest footest() // fn type is really: void(Stest *hidden)
{
Stest data = {}; // *hidden = {};
ptest = &data; // ptest = hidden;
return data; // return;
}
int main()
{
const Stest data = footest(); // Stest data;
// footest (&data);
assert(ptest == &data);
return 0;
}
---
>From gcc-bugs-return-583147-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 18:41:51 2017
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Subject: [Bug tree-optimization/38153] ICE in testcase when compiled with -ftree-parallelize-loops
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Volker Reichelt <reichelt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |jakub at redhat dot com
Known to work| |5.5.0, 6.4.1, 7.2.1, 8.0
Resolution|--- |FIXED
Target Milestone|--- |5.5
Known to fail|6.0 |5.4.0, 6.1.0, 6.4.0, 7.1.0,
| |7.2.0
--- Comment #6 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
This was fixed with Jakub's patch for PR81867 which was applied to trunk and
the GCC 7, GCC 6, and GCC 5 branches:
https://gcc.gnu.org/ml/gcc-cvs/2017-08/msg00266.html
Author: jakub
Date: Thu Aug 10 00:33:20 2017
New Revision: 251019
URL: https://gcc.gnu.org/viewcvs?rev=251019&root=gcc&view=rev
Log:
PR c/81687
* omp-low.c (omp_copy_decl): Don't remap FORCED_LABEL or DECL_NONLOCAL
LABEL_DECLs.
* tree-cfg.c (move_stmt_op): Don't adjust DECL_CONTEXT of FORCED_LABEL
or DECL_NONLOCAL labels.
(move_stmt_r) <case GIMPLE_LABEL>: Adjust DECL_CONTEXT of FORCED_LABEL
or DECL_NONLOCAL labels here.
* testsuite/libgomp.c/pr81687-1.c: New test.
* testsuite/libgomp.c/pr81687-2.c: New test.
Added:
trunk/libgomp/testsuite/libgomp.c/pr81687-1.c
trunk/libgomp/testsuite/libgomp.c/pr81687-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/omp-low.c
trunk/gcc/tree-cfg.c
trunk/libgomp/ChangeLog
Jakub, do you want to add the testcase from comment #1 to the testsuite (which
fails more reliably than the original testcase or the testcase from comment #4
at least on x86_64-pc-linux-gnu). Or do you think the testcases you added are
sufficient?
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Subject: [Bug middle-end/83169] Optimizer doesn't correctly handle NRVO if -fno-inline-small-functions or function uninlinable
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |jakub at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
NRVO in the middle-end is solely an optimization. If some FE requires
something above that, then it needs to do it itself, C++ is an example of a FE
that does it.
>From gcc-bugs-return-583149-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 20:41:07 2017
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Subject: [Bug c++/83170] New: ice in verify_use with -O3
Date: Sun, 26 Nov 2017 20:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83170
Bug ID: 83170
Summary: ice in verify_use with -O3
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
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Created attachment 42722
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42722&action=edit
C++ source code
The attached C++ code, with recent gcc trunk, does this:
during GIMPLE pass: store-merging
bug399.cc: In member function ‘virtual ssize_t udp::UdpTransport::Read(void*,
si
ze_t)’:
bug399.cc:20661:9: internal compiler error: Segmentation fault
ssize_t UdpTransport::Read(void* data, size_t length) {
^~~~~~~~~~~~
0xfe790f crash_signal
../../trunk/gcc/toplev.c:325
0x129879c verify_use
../../trunk/gcc/tree-ssa.c:864
0x129879c verify_ssa(bool, bool)
../../trunk/gcc/tree-ssa.c:1141
0xe65907 execute_function_todo
../../trunk/gcc/passes.c:2001
The bug seems to occur between revisions 254924 and 255154.
I'll have a go at reducing the code.
>From gcc-bugs-return-583150-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 21:26:28 2017
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Subject: [Bug c++/83170] ice in verify_use with -O3
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
Reduced C++ code seems to be:
int a;
enum bk { bm };
enum bn { bo };
enum { bp, bq, br, bs };
class d {
public:
d();
char b;
void bv(char, bn);
char bw[];
};
d::d() { bv(b, bo); }
short c;
void d::bv(char e, bn f) {
bw[bp] = e;
bw[bq] = f;
bw[br] = c >> 8;
bw[bs] = c;
}
class g {
bool cb();
long cc(bk, const char *, unsigned, char *, unsigned, int, int *);
void cd(d *, int);
};
bool g::cb() {
int *cg;
char ch[1];
cc(bm, nullptr, 0, ch, sizeof(ch), a, cg);
}
long g::cc(bk e, const char *, unsigned, char *, unsigned, int h, int *) {
d cl;
cl.bv(e, bo);
cd(&cl, h);
}
>From gcc-bugs-return-583151-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 21:43:57 2017
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From: "lectem at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83171] New: std::bitset::count not inlining __popcountdi2
Date: Sun, 26 Nov 2017 21:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83171
Bug ID: 83171
Summary: std::bitset::count not inlining __popcountdi2
Product: gcc
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Even if the size of the std::bitset is smaller than a long long, the compiler
still emits a call to __popcountdi2 to count the number of bits set to 1.
This is unnecessary for example if the size of the bitset is 8. I believe the
issue lies with the fact that __popcountdi2 is not inlined/optimized, even when
using -O3.
Clang (-O2, using libstdc++) and MSVC(/O2, Visual 2017) seem to handle this
correctly.
Here is a link to the compiler explorer test :
https://godbolt.org/g/QTWgdb
The code used in the test :
//------------------------------------------
#include <bitset>
#include <stdint.h>
size_t foo(uint32_t value)
{
std::bitset<8> bset = value;
return bset.count();
}
//------------------------------------------
gcc -v
Target: x86_64-linux-gnu
Configured with: ../gcc-7.2.0/configure --prefix /root/staging
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
--disable-multilib --disable-bootstrap --disable-multiarch --with-arch-32=i586
--enable-clocale=gnu --enable-languages=c,c++,go,fortran --enable-ld=yes
--enable-gold=yes --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--enable-linker-build-id --enable-lto --enable-plugins --enable-threads=posix
--with-pkgversion=GCC-Explorer-Build
Thread model: posix
gcc version 7.2.0 (GCC-Explorer-Build)
>From gcc-bugs-return-583152-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 21:45:26 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/81985] several sanitizer undefined runtime errors in sanitized libgfortran
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Along the same line mvbits_2.f90 gives
../../../p_work/libgfortran/intrinsics/mvbits.c:48:30: runtime error: left
shift of negative value -1
../../../p_work/libgfortran/intrinsics/mvbits.c:48:30: runtime error: left
shift of negative value -1
>From gcc-bugs-return-583153-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 21:50:34 2017
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Subject: [Bug tree-optimization/83171] std::bitset::count not inlining __popcountdi2
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|x86_64-linux-gnu |
Status|UNCONFIRMED |NEW
Keywords| |missed-optimization
Last reconfirmed| |2017-11-26
Component|c++ |tree-optimization
Host|x86_64-linux-gnu |
Ever confirmed|0 |1
Build|x86_64-linux-gnu |
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Works for me with aarch64:
_Z3fooj:
.LFB1136:
.cfi_startproc
and x0, x0, 255
fmov d0, x0
cnt v0.8b, v0.8b
addv b0, v0.8b
umov w0, v0.b[0]
and x0, x0, 255
ret
And works for me with -march=native:
_Z3fooj:
.LFB1162:
.cfi_startproc
movzbl %dil, %eax
popcntq %rax, %rax
ret
Basically the following is not being optimized:
int _3;
long unsigned int _4;
long long unsigned int _5;
unsigned int _6;
<bb 2> [100.00%]:
_6 = value_1(D) & 255;
_5 = (long long unsigned int) _6;
_3 = __builtin_popcountl (_5);
_4 = (long unsigned int) _3;
To just:
_6 = value_1(D) & 255;
_3 = __builtin_popcount (_6);
_4 = (long unsigned int) _3;
>From gcc-bugs-return-583154-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 21:50:54 2017
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Subject: [Bug tree-optimization/83171] std::bitset::count not inlining __popcountdi2
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-583155-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 21:52:42 2017
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Subject: [Bug middle-end/83169] Optimizer doesn't correctly handle NRVO if -fno-inline-small-functions or function uninlinable
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--- Comment #4 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Jakub Jelinek from comment #3)
> NRVO in the middle-end is solely an optimization. If some FE requires
> something above that, then it needs to do it itself, C++ is an example of a
> FE that does it.
If that's the case, then why the different runtime behaviours?
The generated code sets the address of the constructed variable the same the as
the return address, yet the condition is assumed false by the optimizer.
>From gcc-bugs-return-583156-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 21:55:38 2017
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Subject: [Bug middle-end/83169] Optimizer doesn't correctly handle NRVO if -fno-inline-small-functions or function uninlinable
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83169
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Iain Buclaw from comment #4)
> The generated code sets the address of the constructed variable the same the
> as the return address, yet the condition is assumed false by the optimizer.
data is not taken as an address except in the equals so it cannot be the same
as the global variable pointer. And using ptest after data goes out of scope
in footest is undefined code.
So the difference is just based on undefined code.
>From gcc-bugs-return-583157-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 22:13:11 2017
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From: "ibuclaw at gdcproject dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83169] Optimizer doesn't correctly handle NRVO if -fno-inline-small-functions or function uninlinable
Date: Sun, 26 Nov 2017 22:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83169
--- Comment #6 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Andrew Pinski from comment #5)
> (In reply to Iain Buclaw from comment #4)
> > The generated code sets the address of the constructed variable the same the
> > as the return address, yet the condition is assumed false by the optimizer.
>
> data is not taken as an address except in the equals so it cannot be the
> same as the global variable pointer. And using ptest after data goes out of
> scope in footest is undefined code.
>
> So the difference is just based on undefined code.
So setting CALL_EXPR_RETURN_SLOT_OPT is no guarantee that the return slot is
the address of 'data'? At least from the optimizers POV?
>From gcc-bugs-return-583158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 26 23:41:06 2017
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From: "hao.hou at utah dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83172] New: -Wstack-size= doesn't detect the correct stack size with VLA or alloca
Date: Sun, 26 Nov 2017 23:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83172
Bug ID: 83172
Summary: -Wstack-size= doesn't detect the correct stack size
with VLA or alloca
Product: gcc
Version: 4.8.5
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: hao.hou at utah dot edu
Target Milestone: ---
Created attachment 42723
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42723&action=edit
The preprocessed source code repoduce the bug
The -Wstack-usage= doesn't deduce the correct stack size and reports an
unbounded stack size in the following case:
1. The function uses a variable length array
2. The function uses alloca
Even with alloca(constant) or __builtin_unreachable hints the VLA size,
compiler still mark the max stack size unbounded.
Another related option -Wvla-larger-than= does inferred the maximum VLA size
from the __builtin_unreachable hints.
The expected behavior should be -Wstack-usage= also follows the hint, at least,
for the alloca(constant) case, it should realize the stack size could not be
unbounded.
GCC Version:
Using built-in specs.
COLLECT_GCC=gcc-7
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.1.0-10ubuntu1~16.04.york0'
--with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.1.0 (Ubuntu 7.1.0-10ubuntu1~16.04.york0)
And the preprocessed file that repo this bug is attached.
The command used to repo the bug and it's output:
$ gcc-7 -save-temps -Wvla-larger-than=128 -Wstack-usage=102400 -O3 -c t.c
t.c: In function ‘stack_usage_only’:
t.c:21:5: warning: stack usage might be unbounded [-Wstack-usage=]
int stack_usage_only(unsigned x)
^~~~~~~~~~~~~~~~
t.c: In function ‘alloca_fails_even_with_const’:
t.c:30:5: warning: stack usage might be unbounded [-Wstack-usage=]
int alloca_fails_even_with_const()
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Expected:
Compiles without any warning.
>From gcc-bugs-return-583159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 02:27:00 2017
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From: "mgulick at mathworks dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/83173] New: C preprocessor generates incorrect linemarkers
Date: Mon, 27 Nov 2017 02:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83173
Bug ID: 83173
Summary: C preprocessor generates incorrect linemarkers
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: mgulick at mathworks dot com
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Created attachment 42724
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42724&action=edit
invalid linemarker reproduction source code
GCC is generating incorrect line markers when processing source files with a
large number of includes (e.g. where the internal line map's source location is
greater than LINE_MAP_MAX_LOCATION_WITH_COLS. This results in warnings from
gcc when it compiles this previously preprocessed output. It also results in
gcc generating incorrect line mappings in the debug symbols, as well as
producing compiler warnings and errors that are associated with the wrong file
name and line number.
This invalid line marker is generated for include files that have a '#include'
as the last line in the file. Simply adding an additional newline after the
last include will eliminate this issue.
This issue only occurs when the preprocessor is run as a separate phase, as
when using -save-temps, -no-integrated-cpp, or -E (as is used by distcc).
See also: https://gcc.gnu.org/ml/gcc-help/2017-11/msg00073.html
I have tested gcc 6.3, 7.2, as well as the latest git master (as of yesterday).
These all exhibit this bug. gcc 5.4 does *not* exhibit this bug.
The attached reproducer is able to reproduce this issue on a trivial source
file by using a gcc plugin that artificially increases the line map's starting
location before the preprocessor runs. See README.txt included in the
reproduction tarball for instructions on running the reproducer.
[mgulick@mgulick2-deb9-64:/local-ssd/mgulick/src/gcc/linemarker_repro] ...
$ make
/local-ssd/mgulick/src/gcc/git/debug/gcc/xgcc -B
/local-ssd/mgulick/src/gcc/git/debug/gcc -E repro.c -o repro.i
-fplugin=./location_overflow_plugin.so
-fplugin-arg-location_overflow_plugin-value=0x60000000
setting line_table location offset: 1610612736 was (32)
/local-ssd/mgulick/src/gcc/git/debug/gcc/xgcc -B
/local-ssd/mgulick/src/gcc/git/debug/gcc -c repro.i -o repro.o -Werror
In file included from repro_1.h:3,
from repro.c:1:
repro_2.h:2:16: error: file "repro.h" linemarker ignored due to incorrect
nesting [-Werror]
^
repro_2.h:3:16: error: file "repro.c" linemarker ignored due to incorrect
nesting [-Werror]
#define REPRO_2_H
^
cc1: all warnings being treated as errors
Makefile:45: recipe for target 'test_compile' failed
make: *** [test_compile] Error 1
[mgulick@mgulick2-deb9-64:/local-ssd/mgulick/src/gcc/linemarker_repro] ...
$ cat repro.i
# 1 "repro.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1 "repro.c"
# 1 "repro.h" 1
# 1 "repro_1.h" 1
# 2 "repro.h" 2
# 3 "repro_1.h"
# 1 "repro_2.h" 1
# 2 "repro.h" 2
# 2 "repro.c" 2
The line "# 3 repro_1.h" is incorrect and should not appear.
>From gcc-bugs-return-583160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 04:18:07 2017
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From: "hao.hou at utah dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83174] New: -Wvla-larger-than reports wrong VLA size in some cases
Date: Mon, 27 Nov 2017 04:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83174
Bug ID: 83174
Summary: -Wvla-larger-than reports wrong VLA size in some cases
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: hao.hou at utah dot edu
Target Milestone: ---
Created attachment 42725
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42725&action=edit
The preprocessed source code repoduce the bug
There's some cases that -Wvla-lager-than only warns mistakenly only when the
strlen result is used as allocation size when -O2 or higher is turned on
Example code:
extern void f(void* ptr);
extern char* s;
void good(void)
{
unsigned long long l = __builtin_strlen(s);
if(l < 4)
{
char b[l&2];
f(b);
}
}
void bad(void)
{
unsigned long long l = __builtin_strlen(s);
if(l < 4)
{
char b[l&3];
f(b);
}
}
Compiler arguments:
$ gcc-7 -Wvla-larger-than=0x1000000 -O3 -S -c db.c
db.c: In function ‘bad’:
db.c:18:8: warning: argument to variable-length array may be too large
[-Wvla-larger-than=]
char b[l&3];
^
db.c:18:8: note: limit is 16777216 bytes, but argument may be as large as
9223372036854775806
It only warns the function uses l&3 as the VLA size.
Compiler Version:
Using built-in specs.
COLLECT_GCC=gcc-7
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.1.0-10ubuntu1~16.04.york0'
--with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.1.0 (Ubuntu 7.1.0-10ubuntu1~16.04.york0)
>From gcc-bugs-return-583162-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 05:21:48 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/82488] UBSAN in gcc/expr.c:4098:17: runtime error: signed integer overflow: 0 - -9223372036854775808 cannot be represented in type 'long int'
Date: Mon, 27 Nov 2017 05:21:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-583161-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 05:21:19 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/82488] UBSAN in gcc/expr.c:4098:17: runtime error: signed integer overflow: 0 - -9223372036854775808 cannot be represented in type 'long int'
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82488
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Author: trippels
Date: Mon Nov 27 05:20:43 2017
New Revision: 255159
URL: https://gcc.gnu.org/viewcvs?rev=255159&root=gcc&view=rev
Log:
Fix PR82488 - signed integer overflow in expr.c
bootstrap-ubsan shows:
gcc/expr.c:4103:17: runtime error: signed integer overflow: 0 -
-9223372036854775808 cannot be represented in type 'long int'
Fix by handling the saw_unknown case earlier.
PR rtl-optimization/82488
* expr.c (fixup_args_size_notes): Avoid signed integer overflow.
diff --git a/gcc/expr.c b/gcc/expr.c
index ee07de5aaa44..e9d8555c9452 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -4100,10 +4100,13 @@ fixup_args_size_notes (rtx_insn *prev, rtx_insn *last,
int end_args_size)
if (STACK_GROWS_DOWNWARD)
this_delta = -(unsigned HOST_WIDE_INT) this_delta;
- args_size -= this_delta;
+ if (saw_unknown)
+ args_size = INT_MIN;
+ else
+ args_size -= this_delta;
}
- return saw_unknown ? INT_MIN : args_size;
+ return args_size;
}
#ifdef PUSH_ROUNDING
--
Markus
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expr.c
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Subject: [Bug rtl-optimization/82488] UBSAN in gcc/expr.c:4098:17: runtime error: signed integer overflow: 0 - -9223372036854775808 cannot be represented in type 'long int'
Date: Mon, 27 Nov 2017 05:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82488
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
>From gcc-bugs-return-583164-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 05:45:14 2017
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From: "sbansal at ciena dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83175] New: compiler optimizing the code corresponding to double precision operations
Date: Mon, 27 Nov 2017 05:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83175
Bug ID: 83175
Summary: compiler optimizing the code corresponding to double
precision operations
Product: gcc
Version: 4.8.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: sbansal at ciena dot com
Target Milestone: ---
I am migrating my tool chain from 3.4.5 to 4.8.1.
Migration to 4.8.1 is working great till now but the only problem I am recently
encountering is about code getting optimized when some "double" operations are
done.
Source code :
=========================
553 unlockAddr1_f64 = (double*) thisVars(vol)->unlockAddr1;
554 unlockAddr2_f64 = (double*) thisVars(vol)->unlockAddr2;
555 cmd.word32[0] = ((command<<16) | command);
556 cmd.word32[1] = cmd.word32[0];
557 unlockAddr1_f64[0] = unlock1_cmd.fword64;
558 unlockAddr2_f64[0] = unlock2_cmd.fword64;
559 unlockAddr1_f64[0] = cmd.fword64;
Corresponding assembly with 3.4.5 (working good)
====================================================
/vobs/equinox_ne_bsp/kernel/sources/drivers/ffs/amd16x4mtdome.c:553
13adb0: 81 23 00 18 lwz r9,24(r3)
13adb4: 81 69 00 00 lwz r11,0(r9)
/vobs/equinox_ne_bsp/kernel/sources/drivers/ffs/amd16x4mtdome.c:554
13adb8: 81 49 00 04 lwz r10,4(r9)
/vobs/equinox_ne_bsp/kernel/sources/drivers/ffs/amd16x4mtdome.c:555
13adbc: 54 a0 80 1e rlwinm r0,r5,16,0,15
13adc0: 7c 00 2b 78 or r0,r0,r5
13adc4: 7c 07 03 78 mr r7,r0
/vobs/equinox_ne_bsp/kernel/sources/drivers/ffs/amd16x4mtdome.c:556
13adc8: 7c 08 03 78 mr r8,r0
/vobs/equinox_ne_bsp/kernel/sources/drivers/ffs/amd16x4mtdome.c:557
13adcc: 3d 20 00 67 lis r9,103
13add0: c8 09 7d 08 lfd f0,32008(r9)
13add4: d8 0b 00 00 stfd f0,0(r11)
/vobs/equinox_ne_bsp/kernel/sources/drivers/ffs/amd16x4mtdome.c:558
13add8: 3d 20 00 67 lis r9,103
13addc: c8 09 7d 10 lfd f0,32016(r9)
13ade0: d8 0a 00 00 stfd f0,0(r10)
/vobs/equinox_ne_bsp/kernel/sources/drivers/ffs/amd16x4mtdome.c:559
13ade4: 90 e1 00 08 stw r7,8(r1)
13ade8: 91 01 00 0c stw r8,12(r1)
13adec: c9 a1 00 08 lfd f13,8(r1)
13adf0: d9 ab 00 00 stfd f13,0(r11)
Corresponding assembly with 4.8.1 (not working well) :
================================================================
/vobs/equinox_ne_bsp/kernel/sources/drivers/ffs/amd16x4mtdome.c:554
138e04: 81 0a 00 04 lwz r8,4(r10)
/vobs/equinox_ne_bsp/kernel/sources/drivers/ffs/amd16x4mtdome.c:555
138e08: 54 aa 80 1e rlwinm r10,r5,16,0,15
138e0c: 7d 45 2b 78 or r5,r10,r5
/vobs/equinox_ne_bsp/kernel/sources/drivers/ffs/amd16x4mtdome.c:557
138e10: 3c e0 00 66 lis r7,102
/vobs/equinox_ne_bsp/kernel/sources/drivers/ffs/amd16x4mtdome.c:558
138e14: c8 07 01 c8 lfd f0,456(r7)
138e18: d8 08 00 00 stfd f0,0(r8)
/vobs/equinox_ne_bsp/kernel/sources/drivers/ffs/amd16x4mtdome.c:559
138e1c: 90 a9 00 00 stw r5,0(r9)
138e20: 90 a9 00 04 stw r5,4(r9)
The problem I see is that, no assembly instructions (lfd, stfd) are generated
corresponding to line 557 & 559. It seems compiler is doing some optimization.
Surprisingly, If I add some printf or debug code after line 558, these
instructions are getting generated and code works well.
I know 4.8.1 is no longer supported by GCC, but I would appreciate if you could
give some directions which I can look. Probably some flags etc which I can set.
let me know if you need more information.
Thanks.
Sumit
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Subject: [Bug c/83175] compiler optimizing the code corresponding to double precision operations
Date: Mon, 27 Nov 2017 05:50:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Try -fno-strict-aliasing as it looks like the code is violating C/C++ aliasing
rules.
>From gcc-bugs-return-583167-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 05:51:50 2017
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From: "sbansal at ciena dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/83175] compiler optimizing the code corresponding to double precision operations
Date: Mon, 27 Nov 2017 05:51:00 -0000
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--- Comment #2 from Sumit <sbansal at ciena dot com> ---
(In reply to Andrew Pinski from comment #1)
> Try -fno-strict-aliasing as it looks like the code is violating C/C++
> aliasing rules.
Thanks for the quick response. I am trying that and will let you know.
>From gcc-bugs-return-583166-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 05:51:25 2017
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From: "andrewm.roberts at sky dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Mon, 27 Nov 2017 05:51:00 -0000
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--- Comment #12 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Ok I've tried again with this weeks snapshot:
gcc version 8.0.0 20171126 (experimental) (GCC)
Taking combination of -march and -mtune which works well on Ryzen:
/usr/local/gcc/bin/gcc -march=core-avx-i -mtune=nocona -O3 matrix.c -o matrix
./matrix
mult took 131153 clocks
Then switching to -mtune=znver1
/usr/local/gcc/bin/gcc -march=core-avx-i -mtune=znver1 -O3 matrix.c -o matrix
./matrix
mult took 231309 clocks
Then looking at the differences in the -Q --help=target output for these two
and eliminating each difference at a time, I found that:
gcc -march=core-avx-i -mtune=znver1 -mprefer-vector-width=none -O3 matrix.c -o
matrix
[aroberts@ryzen share]$ ./matrix
mult took 132295 clocks
The default for znver1 is: -mprefer-vector-width=128
So is this option still helping with the latest microcode? Not in this case at
least.
cat /proc/cpuinfo :
processor : 0
vendor_id : AuthenticAMD
cpu family : 23
model : 1
model name : AMD Ryzen 7 1700 Eight-Core Processor
stepping : 1
microcode : 0x8001129
with -march=znver1 -mtune=znver1
with default of -mprefer-vector-width=128
mult took 386291 clocks
with -march=znver1 -mtune=znver1 -mprefer-vector-width=none
mult took 201455 clocks
>From gcc-bugs-return-583168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 06:12:14 2017
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Subject: [Bug c/83175] compiler optimizing the code corresponding to double precision operations
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--- Comment #3 from Sumit <sbansal at ciena dot com> ---
(In reply to Andrew Pinski from comment #1)
> Try -fno-strict-aliasing as it looks like the code is violating C/C++
> aliasing rules.
Hi Andrew,
It does not have any effect. Still the same problem.
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Subject: [Bug middle-end/83175] compiler optimizing the code corresponding to double precision operations
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83175
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target| |Powerpc*-*-*
Status|UNCONFIRMED |RESOLVED
Component|c |middle-end
Resolution|--- |INVALID
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I did not notice this before but you either need to use volatile or a memory
barrier between the writes of unlockAddr1_f64[0].
Something like:
volatile double *unlockAddr1_f64 = (volatile double*)
thisVars(vol)->unlockAddr1;
volatile double *unlockAddr2_f64 = (volatile double*)
thisVars(vol)->unlockAddr2;
cmd.word32[0] = ((command<<16) | command);
cmd.word32[1] = cmd.word32[0];
unlockAddr1_f64[0] = unlock1_cmd.fword64;
unlockAddr2_f64[0] = unlock2_cmd.fword64;
unlockAddr1_f64[0] = cmd.fword64;
Or something like:
unlockAddr1_f64 = (double*) thisVars(vol)->unlockAddr1;
unlockAddr2_f64 = (double*) thisVars(vol)->unlockAddr2;
cmd.word32[0] = ((command<<16) | command);
cmd.word32[1] = cmd.word32[0];
unlockAddr1_f64[0] = unlock1_cmd.fword64;
asm("":::"memory");
unlockAddr2_f64[0] = unlock2_cmd.fword64;
asm("":::"memory");
unlockAddr1_f64[0] = cmd.fword64;
>From gcc-bugs-return-583170-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 07:51:47 2017
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From: "cfztol at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83064] DO CONCURRENT inconsistent results
Date: Mon, 27 Nov 2017 07:51:00 -0000
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--- Comment #14 from Christian Felter <cfztol at hotmail dot com> ---
I looked into the working draft of Fortran 2015 (J3/16-007r1). In Note 12.52 it
says:
The above constraints are designed to guarantee that a pure procedure is free
from side effects (modifications of data visible outside the procedure), which
means that it is safe to reference it in constructs such as DO CONCURRENT and
FORALL, where there is no explicit order of evaluation. <...more text
skipped...>
From that I believe that the test program is valid Fortran.
>From gcc-bugs-return-583171-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 07:53:24 2017
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Subject: [Bug libfortran/83168] FAIL: gfortran.dg/fmt_f0_2.f90 with a sanitized libgfortran
Date: Mon, 27 Nov 2017 07:53:00 -0000
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Try this fix:
> ...
It works! Thanks.
>From gcc-bugs-return-583172-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 07:56:04 2017
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83176] New: [8 Regression] [graphite] ICE in set_codegen_error, at graphite-isl-ast-to-gimple.c:206
Date: Mon, 27 Nov 2017 07:56:00 -0000
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Bug ID: 83176
Summary: [8 Regression] [graphite] ICE in set_codegen_error, at
graphite-isl-ast-to-gimple.c:206
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-8.0.0-alpha20171126 snapshot (r255155) ICEs when compiling the following
snippet w/ -O2 (-O3, -Ofast) -floop-nest-optimize:
int wx, qi;
void
yj (int gw)
{
int *ak = &gw;
while (wx != 0)
{
int k2 = &ak;
int **xq = (int **)&k2;
ja:
*xq = &gw;
while (qi < 1)
{
unsigned short int ey;
be:
for (ey = 0; ey < 251; ++ey)
{
for (wx = 0; wx < 2; ++wx)
{
}
*ak += 8555712;
k2 += *ak;
}
++qi;
}
}
gw = 1;
if (gw != 0)
goto ja;
else
goto be;
}
% gcc-8.0.0-alpha20171126 -O2 -floop-nest-optimize -w -c cpnhvog9.c
during GIMPLE pass: graphite
cpnhvog9.c: In function 'yj':
cpnhvog9.c:4:1: internal compiler error: in set_codegen_error, at
graphite-isl-ast-to-gimple.c:206
yj (int gw)
^~
0x7e3b40 translate_isl_ast_to_gimple::set_codegen_error()
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-isl-ast-to-gimple.c:205
0x7e403c translate_isl_ast_to_gimple::set_codegen_error()
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/tree.h:3216
0x7e403c translate_isl_ast_to_gimple::get_rename_from_scev(tree_node*,
gimple**, loop*, vec<tree_node*, va_heap, vl_ptr>)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-isl-ast-to-gimple.c:1074
0x7e4245
translate_isl_ast_to_gimple::graphite_copy_stmts_from_block(basic_block_def*,
basic_block_def*, vec<tree_node*, va_heap, vl_ptr>)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-isl-ast-to-gimple.c:1190
0x7e45e6
translate_isl_ast_to_gimple::copy_bb_and_scalar_dependences(basic_block_def*,
edge_def*, vec<tree_node*, va_heap, vl_ptr>)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-isl-ast-to-gimple.c:1239
0x13ee5e1
translate_isl_ast_to_gimple::translate_isl_ast_node_user(isl_ast_node*,
edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-isl-ast-to-gimple.c:802
0x13ee7b6 translate_isl_ast_to_gimple::translate_isl_ast_for_loop(loop*,
isl_ast_node*, edge_def*, tree_node*, tree_node*, tree_node*, std::map<isl_id*,
tree_node*, std::less<isl_id*>, std::allocator<std::pair<isl_id* const,
tree_node*> > >&)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-isl-ast-to-gimple.c:621
0x13ee9da translate_isl_ast_to_gimple::translate_isl_ast_node_for(loop*,
isl_ast_node*, edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-isl-ast-to-gimple.c:723
0x13ee7b6 translate_isl_ast_to_gimple::translate_isl_ast_for_loop(loop*,
isl_ast_node*, edge_def*, tree_node*, tree_node*, tree_node*, std::map<isl_id*,
tree_node*, std::less<isl_id*>, std::allocator<std::pair<isl_id* const,
tree_node*> > >&)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-isl-ast-to-gimple.c:621
0x13ee9da translate_isl_ast_to_gimple::translate_isl_ast_node_for(loop*,
isl_ast_node*, edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-isl-ast-to-gimple.c:723
0x13eeaa4 translate_isl_ast_to_gimple::translate_isl_ast_node_block(loop*,
isl_ast_node*, edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-isl-ast-to-gimple.c:831
0x13eee9c graphite_regenerate_ast_isl(scop*)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-isl-ast-to-gimple.c:1474
0x13ebb23 graphite_transform_loops()
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite.c:384
0x13ec4c0 graphite_transforms
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite.c:447
0x13ec4c0 execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite.c:524
>From gcc-bugs-return-583173-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 08:02:18 2017
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Subject: [Bug bootstrap/81470] [8 Regression] Bootstrap comparison failures in gcc/ada
Date: Mon, 27 Nov 2017 08:02:00 -0000
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--- Comment #4 from Rainer Emrich <rainer@emrich-ebersheim.de> ---
Unfortunately the issue persists. There are even more failures.
Comparing stages 2 and 3
Bootstrap comparison failure!
gcc/ada/ali-util.o differs
gcc/ada/ali.o differs
gcc/ada/bindgen.o differs
gcc/ada/b_gnatb.o differs
gcc/ada/checks.o differs
gcc/ada/errout.o differs
gcc/ada/erroutc.o differs
gcc/ada/expander.o differs
gcc/ada/exp_aggr.o differs
gcc/ada/exp_attr.o differs
gcc/ada/exp_ch3.o differs
gcc/ada/exp_ch4.o differs
gcc/ada/exp_ch5.o differs
gcc/ada/exp_ch6.o differs
gcc/ada/exp_disp.o differs
gcc/ada/exp_unst.o differs
gcc/ada/freeze.o differs
gcc/ada/gnat1drv.o differs
gcc/ada/gnatbind.o differs
gcc/ada/lib-xref.o differs
gcc/ada/libgnat/s-os_lib.o differs
gcc/ada/namet.o differs
gcc/ada/output.o differs
gcc/ada/par.o differs
gcc/ada/prep.o differs
gcc/ada/repinfo.o differs
gcc/ada/restrict.o differs
gcc/ada/rtsfind.o differs
gcc/ada/scn.o differs
gcc/ada/sem_attr.o differs
gcc/ada/sem_ch12.o differs
gcc/ada/sem_ch13.o differs
gcc/ada/sem_ch6.o differs
gcc/ada/sem_ch8.o differs
gcc/ada/sem_elab.o differs
gcc/ada/sem_eval.o differs
gcc/ada/sem_prag.o differs
gcc/ada/sem_spark.o differs
gcc/ada/sem_util.o differs
gcc/ada/sinput-d.o differs
gcc/ada/switch-b.o differs
gcc/ada/switch-c.o differs
gcc/ada/targparm.o differs
gcc/ada/tree_io.o differs
gcc/ada/widechar.o differs
make[2]: *** [Makefile:23331: compare] Error 1
>From gcc-bugs-return-583174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 08:06:29 2017
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Subject: [Bug libfortran/83168] FAIL: gfortran.dg/fmt_f0_2.f90 with a sanitized libgfortran
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tkoenig at gcc dot gnu.org
--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Hi Jerry,
> diff --git a/libgfortran/io/write.c b/libgfortran/io/write.c
> index c9aad150..d26358c0 100644
> --- a/libgfortran/io/write.c
> +++ b/libgfortran/io/write.c
> @@ -1552,7 +1552,7 @@ select_string (st_parameter_dt *dtp, const fnode *f,
> char *buf, size_t *size,
> int kind)
> {
> char *result;
> - *size = size_from_kind (dtp, f, kind) + f->u.real.d;
> + *size = size_from_kind (dtp, f, kind) + f->u.real.d + 1;
> if (*size > BUF_STACK_SZ)
> result = xmalloc (*size);
> else
Pre-approved (if you don't consider it obvious in the first place :-)
>From gcc-bugs-return-583175-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 08:33:35 2017
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Subject: [Bug fortran/83148] [8 regression] ICE: crash_signal from toplev.c:325
Date: Mon, 27 Nov 2017 08:33:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug other/83150] GCC's internal use of `abort`is unsafe in several ways
Date: Mon, 27 Nov 2017 08:34:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
There's a dup about the calling of async unsafe functions during internal error
handling, PR28859.
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Subject: [Bug target/83156] [8 regression] gcc.target/i386/pr82361-1.c fail
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug target/83100] [8 Regression] powerpc: internal compiler error: in get_variable_section, at varasm.c:1150 with -fdata-sections
Date: Mon, 27 Nov 2017 08:35:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Nov 27 08:34:50 2017
New Revision: 255160
URL: https://gcc.gnu.org/viewcvs?rev=255160&root=gcc&view=rev
Log:
PR target/83100
* varasm.c (bss_initializer_p): Return true for DECL_COMMON
TREE_READONLY decls.
* gcc.dg/pr83100-1.c: New test.
* gcc.dg/pr83100-2.c: New test.
* gcc.dg/pr83100-3.c: New test.
* gcc.dg/pr83100-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr83100-1.c
trunk/gcc/testsuite/gcc.dg/pr83100-2.c
trunk/gcc/testsuite/gcc.dg/pr83100-3.c
trunk/gcc/testsuite/gcc.dg/pr83100-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/varasm.c
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Subject: [Bug testsuite/83155] [8 regression] test-error-array-bounds.c.exe fail
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Subject: [Bug debug/83157] [8 regression] gcc.dg/guality/pr41616-1.c fail
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Just different inlining, thus a latent bug.
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Subject: [Bug target/83158] [8 regression] gcc.target/i386/pr78057.c fail
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Subject: [Bug libgomp/83159] [8 regression] g++.dg/gomp/declare-simd-1.C fail
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Subject: [Bug tree-optimization/83177] New: ICE with -mmpx -fcheck-pointer-bounds + __builtin___bnd_narrow_ptr_bounds + _setjmp
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Bug ID: 83177
Summary: ICE with -mmpx -fcheck-pointer-bounds +
__builtin___bnd_narrow_ptr_bounds + _setjmp
Product: gcc
Version: 7.2.1
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Host: x86-64
Created attachment 42726
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42726&action=edit
Preprocessed source code illustrating the bug.
I got this when compiling an experimental version of GNU Emacs. I used GCC
7.2.1 20170915 (Red Hat 7.2.1-2) on x86-74 (Fedora 27). To reproduce, compile
the attached program via:
gcc -mmpx -fcheck-pointer-bounds -S v.i
The output is:
Unable to coalesce ssa_names 253 and 236 which are marked as MUST COALESCE.
__bound_tmp.11_253(ab) and __bound_tmp.11_236(ab)
v.i: In function ‘internal_lisp_condition_case.chkp’:
v.i:143:1: internal compiler error: SSA corruption
internal_lisp_condition_case (Lisp_Object var, Lisp_Object bodyform,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugzilla.redhat.com/bugzilla> for instructions.
Preprocessed source stored into /tmp/ccZ79fr1.out file, please attach this to
y\
our bugreport.
I will attach /tmp/ccZ79fr1.out.
>From gcc-bugs-return-583185-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 08:45:47 2017
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Subject: [Bug tree-optimization/83177] ICE with -mmpx -fcheck-pointer-bounds + __builtin___bnd_narrow_ptr_bounds + _setjmp
Date: Mon, 27 Nov 2017 08:45:00 -0000
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--- Comment #1 from Paul Eggert <eggert at gnu dot org> ---
Created attachment 42727
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42727&action=edit
Compiler output generated for crash on v.i
>From gcc-bugs-return-583187-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 08:49:32 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/81307] [8 regression] g++.dg/debug/debug9.C -gstabs FAILs
Date: Mon, 27 Nov 2017 08:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81307
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Nov 27 08:48:56 2017
New Revision: 255161
URL: https://gcc.gnu.org/viewcvs?rev=255161&root=gcc&view=rev
Log:
PR debug/81307
* dbxout.c (lastlineno): New variable.
(dbx_debug_hooks): Use dbxout_switch_text_section as
switch_text_section debug hook.
(dbxout_function_end): Switch to current_function_section
rather than function_section. If crtl->has_bb_partition,
output just one N_FUN, depending on in_cold_section_p.
(dbxout_source_line): Remember last lineno in lastlineno.
(dbxout_switch_text_section): New function.
(dbxout_function_decl): Adjust dbxout_block caller.
(dbx_block_with_cold_children): New function.
(dbxout_block): Return true if any LBRAC/RBRAC have been
emitted. Use dbx_block_with_cold_children at depth == 0
in second partition. Add PARENT_BLOCKNUM argument, pass
it optionally adjusted to children. Output LBRAC/RBRAC
around recursive call only if the block is in the current
partition, if not and anything was output, emit empty
range LBRAC/RBRAC.
* final.c (final_scan_insn): Compute cold_function_name
before calling switch_text_section debug hook. Call
that hook even if dwarf2out_do_frame if not emitting
dwarf debug info.
* g++.dg/debug/debug9.C: Remove -fno-reorder-blocks-and-partition
workaround.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dbxout.c
trunk/gcc/final.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/debug/debug9.C
>From gcc-bugs-return-583186-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 08:49:04 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/83162] [6/7/8 Regression] x86-64 -Wclobbered issuing more false alarms (regression)
Date: Mon, 27 Nov 2017 08:49:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic, ra
CC| |jakub at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Component|c |rtl-optimization
Known to work| |4.8.5
Target Milestone|--- |7.3
Summary|x86-64 -Wclobbered issuing |[6/7/8 Regression] x86-64
|more false alarms |-Wclobbered issuing more
|(regression) |false alarms (regression)
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hm, so the warning just does
static void
setjmp_args_warning (bitmap setjmp_crosses)
{
tree decl;
for (decl = DECL_ARGUMENTS (current_function_decl);
decl; decl = DECL_CHAIN (decl))
if (DECL_RTL (decl) != 0
&& REG_P (DECL_RTL (decl))
&& regno_clobbered_at_setjmp (setjmp_crosses, REGNO (DECL_RTL (decl))))
warning (OPT_Wclobbered,
"argument %q+D might be clobbered by %<longjmp%> or %<vfork%>",
decl);
and thus looks whether the PARM_DECL is expanded as a register and is
regno_clobbered_at_setjmp. But it seems to fail to exclude call clobbered
registers as we can see we spill those regs:
module_vec_set:
.LFB0:
.cfi_startproc
subq $40, %rsp
.cfi_def_cfa_offset 48
movq %rdi, 8(%rsp)
movl $jb, %edi
movq %rsi, 16(%rsp)
movq %rdx, 24(%rsp)
call _setjmp
testl %eax, %eax
jne .L1
xorl %eax, %eax
cmpb $0, module_assertions(%rip)
movq 24(%rsp), %rcx
movq 16(%rsp), %rsi
...
/* True if register REGNO was alive at a place where `setjmp' was
called and was set more than once or is an argument. Such regs may
be clobbered by `longjmp'. */
static bool
regno_clobbered_at_setjmp (bitmap setjmp_crosses, int regno)
I don't really understand what this is about. At least call clobbered
regs should get spilled so this should be about callee saved ones only?
>From gcc-bugs-return-583188-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 08:50:07 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/83163] bootstrap comparison failure with --enable-languages=all,jit
Date: Mon, 27 Nov 2017 08:50:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
What's your host compiler version? I experience miscompars with using GCC 4.8
and STAGE1_CFLAGS="-O2 -g" but checking enabled.
>From gcc-bugs-return-583189-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 08:54:20 2017
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Subject: [Bug middle-end/83164] [8 regression] internal compiler error: verify_gimple failed
Date: Mon, 27 Nov 2017 08:54:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
comparison verification has
/* For comparisons we do not have the operations type as the
effective type the comparison is carried out in. Instead
we require that either the first operand is trivially
convertible into the second, or the other way around.
Because we special-case pointers to void we allow
comparisons of pointers with the same mode as well. */
if (!useless_type_conversion_p (op0_type, op1_type)
&& !useless_type_conversion_p (op1_type, op0_type)
&& (!POINTER_TYPE_P (op0_type)
|| !POINTER_TYPE_P (op1_type)
|| TYPE_MODE (op0_type) != TYPE_MODE (op1_type)))
{
which works around a similar issue there (the comment is outdated).
IIRC the following is to not wreck targets with function descriptors
where the conversion generates code(?) I'd be very happy to get rid
of this special case and/or if this is really the case make it
more explicit somehow.
bool
useless_type_conversion_p (tree outer_type, tree inner_type)
{
/* Do the following before stripping toplevel qualifiers. */
if (POINTER_TYPE_P (inner_type)
&& POINTER_TYPE_P (outer_type))
{
...
/* Do not lose casts to function pointer types. */
if ((TREE_CODE (TREE_TYPE (outer_type)) == FUNCTION_TYPE
|| TREE_CODE (TREE_TYPE (outer_type)) == METHOD_TYPE)
&& !(TREE_CODE (TREE_TYPE (inner_type)) == FUNCTION_TYPE
|| TREE_CODE (TREE_TYPE (inner_type)) == METHOD_TYPE))
return false;
>From gcc-bugs-return-583190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 09:07:49 2017
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83021] [7/8 Regression] gfortran segfault in polymorphic assignment
Date: Mon, 27 Nov 2017 09:07:00 -0000
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--- Comment #11 from Jürgen Reuter <juergen.reuter at desy dot de> ---
The ICEs are indeed with that problem.
(Duplicate ticket https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83042)
However, now I get segfaults however in several of our C and C++ bind(C)
interfaces. I do not know whether this is at all related to this here. Will try
to isolate the other thing, however, that will not work without also shipping C
code.
>From gcc-bugs-return-583191-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 09:12:50 2017
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Subject: [Bug tree-optimization/83171] __builtin_popcountl ((unsigned long long)unsigned_var) is not being optimized to __builtin_popcount (unsigned_var)
Date: Mon, 27 Nov 2017 09:12:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
A match.pd pattern would fix that I guess. Similarly we can elide
conversions of args to ffs and ctz.
>From gcc-bugs-return-583192-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 09:28:25 2017
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
Date: Mon, 27 Nov 2017 09:28:00 -0000
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David Binderman <dcb314 at hotmail dot com> changed:
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----------------------------------------------------------------------------
CC| |dcb314 at hotmail dot com
--- Comment #7 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Siddhesh Poyarekar from comment #5)
> This fixes the problem for me.
Maybe some more extensive testing of your patch would increase
the chances of it being accepted.
>From gcc-bugs-return-583193-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 10:14:38 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83176] [8 Regression] [graphite] ICE in set_codegen_error, at graphite-isl-ast-to-gimple.c:206
Date: Mon, 27 Nov 2017 10:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-27
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
(gdb) p debug_generic_expr (scev)
{(int) {(unsigned int) pretmp_68, +, 2147483712}_4, +, 8555712}_2
and we fail in chrec_apply for _2 doing
case POLYNOMIAL_CHREC:
...
/* "{a, +, b} (x)" -> "a + b*x". */
x = chrec_convert_rhs (type, x, NULL);
res = chrec_fold_multiply (TREE_TYPE (x), CHREC_RIGHT (chrec), x);
res = chrec_fold_plus (type, CHREC_LEFT (chrec), res);
chrec_fold_plus (int, (int) {(unsigned int) pretmp_68, +, 2147483712}_4,
(int) graphite_IV.18_31 * 8555712)
which has
switch (TREE_CODE (op0))
{
...
CASE_CONVERT:
if (tree_contains_chrecs (op0, NULL))
return chrec_dont_know;
/* FALLTHRU */
I think we can handle this particular case as
(int) {(unsigned int) pretmp_68 + (unsigned int) (int) graphite_IV.18_31 *
8555712, +, 2147483712}_4
but in the end during SCEV validation we may want to avoid conversions of
CHRECs in not outer context.
>From gcc-bugs-return-583194-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 10:18:09 2017
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Subject: [Bug c++/83170] ice in verify_use with -O3
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(gdb) p debug_gimple_stmt (stmt)
# VUSE <.MEM_13>
load_dst_4 = MEM[(short int *)&c];
<ssa_name 0x7ffff6a1fb40 nothrow public visited var <var_decl 0x7ffff6a0bab0
.MEM>
def_stmt
version:13 in-free-list>
>From gcc-bugs-return-583195-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 10:33:44 2017
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Subject: [Bug tree-optimization/81248] No ipa-sra optimization for small struct / class
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--- Comment #8 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Mon Nov 27 10:33:06 2017
New Revision: 255163
URL: https://gcc.gnu.org/viewcvs?rev=255163&root=gcc&view=rev
Log:
[PR 81248] Fix ipa-sra size check
2017-11-27 Martin Jambor <mjambor@suse.cz>
PR tree-optimization/81248
* tree-sra.c (splice_param_accesses): Remove size check.
(decide_one_param_reduction): Fix size check.
* gimple-pretty-print.c (dump_profile): Silence warning.
* params.def (PARAM_IPA_SRA_PTR_GROWTH_FACTOR): Adjust description.
testsuite/
* g++.dg/ipa/pr81248.C: New test.
* gcc.dg/tree-ssa/ssa-pre-31.c: Disable IPA-SRA.
* gcc/testsuite/gcc.dg/ipa/ipcp-cstagg-2.c: Likewise.
Added:
trunk/gcc/testsuite/g++.dg/ipa/pr81248.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-pretty-print.c
trunk/gcc/params.def
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/ipa/ipcp-cstagg-2.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-31.c
trunk/gcc/tree-sra.c
>From gcc-bugs-return-583196-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 10:36:11 2017
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Subject: [Bug fortran/80645] [8 regression] FAIL: gfortran.dg/elemental_subroutine_3.f90 -O1 (test for excess errors)
Date: Mon, 27 Nov 2017 10:36:00 -0000
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--- Comment #7 from Andreas Schwab <schwab@linux-m68k.org> ---
comment#1 is completely unrelated to this bug.
>From gcc-bugs-return-583197-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 10:45:45 2017
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Subject: [Bug target/83100] [8 Regression] powerpc: internal compiler error: in get_variable_section, at varasm.c:1150 with -fdata-sections
Date: Mon, 27 Nov 2017 10:45:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-583198-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 10:45:50 2017
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Subject: [Bug debug/81307] [8 regression] g++.dg/debug/debug9.C -gstabs FAILs
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug libgomp/83159] [8 regression] g++.dg/gomp/declare-simd-1.C fail
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----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
.
>From gcc-bugs-return-583200-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 10:48:57 2017
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Subject: [Bug tree-optimization/80776] -Wformat-overflow false positive for %d on integer bounded by __builtin_unreachable
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
For this case it is
<bb 2> [100.00%]:
# RANGE [0, 2147483647] NONZERO 2147483647
# USE = nonlocal { D.1796 } (nonlocal, escaped, interposable)
# CLB = nonlocal { D.1796 } (nonlocal, escaped, interposable)
i_4 = somerandom ();
# RANGE [0, 4294967295]
_1 = (unsigned int) i_4;
# RANGE [0, 1]
_7 = _1 > 999999;
if (_7 != 0)
goto <bb 3>; [0.04%]
else
goto <bb 4>; [99.96%]
<bb 3> [0.08%]:
__builtin_unreachable ();
<bb 4> [99.92%]:
# USE = nonlocal { D.1796 } (nonlocal, escaped, interposable)
# CLB = nonlocal { D.1796 } (nonlocal, escaped, interposable)
__builtin___sprintf_chk (&number, 1, 7, "%d", i_4);
return;
that is not handled because we don't insert ASSERT_EXPRs for i_4 (we don't
do that for uses appearing in PHI merge position because we don't insert
PHIs).
The DOM algorithm would get this right but it doesn't have the
remove_range_assertions () "trick" of handling __builtin_unreachable ().
Let me see if I can manage to fix that.
>From gcc-bugs-return-583201-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 11:01:31 2017
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This changed with r253266 aka PR56973 or DR696.
>From gcc-bugs-return-583202-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 11:14:12 2017
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Subject: [Bug c++/69638] array out of bounds access accepted in constexpr function invocation
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed|2016-02-02 00:00:00 |2017-11-27
Ever confirmed|0 |1
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #1)
> I get the following errors with gcc8:
>
> $ /usr/local/bin/g++ -c -S -Wall -Wextra -Wpedantic -std=c++14 -xc++ 69638.cc
> 69638.cc:11:28: in constexpr expansion of ‘foo()’
> 69638.cc:11:33: error: array subscript value ‘99’ is outside the bounds of
> array ‘a’ of type ‘A [3]’
> struct B { unsigned b: foo () + 1; };
> ^
> 69638.cc:7:4: note: declared here
> A a [3] = { 1, 2, 3 };
> ^
> 69638.cc:11:33: error: bit-field ‘B::b’ width not an integer constant
> struct B { unsigned b: foo () + 1; };
> ^
> 69638.cc: In function ‘constexpr int bar(int)’:
> 69638.cc:16:8: warning: ISO C++ forbids variable length array ‘a’ [-Wvla]
> A a [n] = { 1, 2, 3 };
> ^
> 69638.cc: At global scope:
> 69638.cc:21:21: in constexpr expansion of ‘bar(1)’
> 69638.cc:21:27: error: array subscript value ‘1’ is outside the bounds of
> array ‘a’ of type ‘A [n]’
> unsigned c: bar (1) + 1;
> ^
> 69638.cc:16:4: note: declared here
> A a [n] = { 1, 2, 3 };
> ^
> 69638.cc:21:27: error: bit-field ‘C::c’ width not an integer constant
> unsigned c: bar (1) + 1;
> ^
> $
>
> Were these the errors you were expecting? Leaving UNCONFIRMED because I'm
> not sure...
Putting in WAITING for a response.
>From gcc-bugs-return-583203-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 11:19:48 2017
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Subject: [Bug tree-optimization/81248] No ipa-sra optimization for small struct / class
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Martin Jambor <jamborm at gcc dot gnu.org> ---
The rewrite did not happen in time for GCC 8 so I fixed the problematic size
check.
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Subject: [Bug target/80881] [7/8 Regression] null pointer access in libgomp.h
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jyong at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
CCing Cygwin/Mingw maintainer.
>From gcc-bugs-return-583205-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 11:29:36 2017
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Subject: [Bug middle-end/80926] [7/8 Regression] longjmp not treated as noreturn during CFG build
Date: Mon, 27 Nov 2017 11:29:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |jakub at gcc dot gnu.org
Resolution|--- |WONTFIX
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, I think the only thing that can be done is make sure one provides
attributes for the longjmp etc. declarations.
glibc does that:
extern void longjmp (struct __jmp_buf_tag __env[1], int __val)
__THROWNL __attribute__ ((__noreturn__));
etc.
So, AIX needs to do that too, and people who declare it themselves should as
well if they care about this.
Given the existance of the builtins that do something different I'm afraid
there is nothing else that can be done.
>From gcc-bugs-return-583206-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 11:31:54 2017
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Subject: [Bug testsuite/83155] [8 regression] test-error-array-bounds.c.exe fail
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |jakub at gcc dot gnu.org
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So fixed.
>From gcc-bugs-return-583207-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 11:42:52 2017
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Subject: [Bug tree-optimization/80198] [6/7/8 Regression] does not vectorize generic inplace integer operation
Date: Mon, 27 Nov 2017 11:42:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Jeff, any progress with this?
>From gcc-bugs-return-583208-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 12:13:31 2017
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Subject: [Bug tree-optimization/80788] [8 Regression] ICE in set_value_range, at tree-vrp.c:252
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42728
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42728&action=edit
gcc8-pr80788.patch
Untested fix.
>From gcc-bugs-return-583209-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 12:22:55 2017
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Subject: [Bug target/80881] [7/8 Regression] null pointer access in libgomp.h
Date: Mon, 27 Nov 2017 12:22:00 -0000
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--- Comment #5 from jyong at gcc dot gnu.org ---
Can you post the full backtrace? Meanwhile, I'll setup gcc with --enable-tls
and give this a try.
>From gcc-bugs-return-583210-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 12:33:11 2017
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Subject: [Bug middle-end/80929] [6/7/8 Regression] Division with constant no more optimized to mult highpart
Date: Mon, 27 Nov 2017 12:33:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The problem is that for non-single set PARALLELs there is just not a good guess
what to do without target's help. For some targets and such insns, the best
cost estimate could be maximum of the cost of both sets, for others ignoring
one of them and looking only at the other one, for others the sum of both
costs.
E.g. the various compare + arithmetics pattern on many targets really have the
cost of the arithmetics - pattern_cost even has code for that case.
insn_cost (I'm not aware of insn_rtx_cost) has a way for the target to override
it and therefore you could in the backend decide what to do.
seq_cost doesn't, perhaps it could just call insn_cost for non-single_set
insns.
>From gcc-bugs-return-583211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 12:35:16 2017
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Subject: [Bug ipa/83178] New: [8 regression] g++.dg/ipa/devirt-22.C fail
Date: Mon, 27 Nov 2017 12:35:00 -0000
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Bug ID: 83178
Summary: [8 regression] g++.dg/ipa/devirt-22.C fail
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
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r255104 triggers this:
spawn -ignore SIGHUP /work/gcc/testsuite/g++6/../../xg++
-B/work/gcc/testsuite/g++6/../../ /source/gcc/testsuite/g++.dg/ipa/devirt-22.C
-fno-diagnostics-show-caret -fdiagnostics-color=never -nostdinc++
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/source/libstdc++-v3/libsupc++ -I/source/libstdc++-v3/include/backward
-I/source/libstdc++-v3/testsuite/util -fmessage-length=0 -std=gnu++98 -O3
-fno-early-inlining -fno-ipa-sra -fdump-ipa-cp -S -o devirt-22.s
PASS: g++.dg/ipa/devirt-22.C -std=gnu++98 (test for excess errors)
FAIL: g++.dg/ipa/devirt-22.C -std=gnu++98 scan-ipa-dump-times cp "Discovered
a virtual call to a known target" 1 (found 2 times)
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=haswell --with-cpu=haswell
>From gcc-bugs-return-583212-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 12:38:55 2017
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Subject: [Bug ipa/83179] New: [8 regression] gcc.dg/ipa/inline-1.c fail
Date: Mon, 27 Nov 2017 12:38:00 -0000
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Bug ID: 83179
Summary: [8 regression] gcc.dg/ipa/inline-1.c fail
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
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r255103 triggers this:
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.dg/ipa/inline-1.c -fno-diagnostics-show-caret
-fdiagnostics-color=never -O3 -c -fdump-ipa-inline -S -o inline-1.s
PASS: gcc.dg/ipa/inline-1.c (test for excess errors)
PASS: gcc.dg/ipa/inline-1.c scan-ipa-dump-not inline "op0 is compile time
invariant"
PASS: gcc.dg/ipa/inline-1.c scan-ipa-dump-not inline "op0 change"
PASS: gcc.dg/ipa/inline-1.c scan-ipa-dump inline "op1 is compile time
invariant"
FAIL: gcc.dg/ipa/inline-1.c scan-ipa-dump inline "op2 change 9.990000. of time"
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=haswell --with-cpu=haswell
>From gcc-bugs-return-583213-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 12:39:24 2017
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Subject: [Bug middle-end/80929] [6/7/8 Regression] Division with constant no more optimized to mult highpart
Date: Mon, 27 Nov 2017 12:39:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42729
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42729&action=edit
gcc8-pr80929.patch
Like this untested patch.
>From gcc-bugs-return-583214-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 12:56:12 2017
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Subject: [Bug ipa/83179] [8 regression] gcc.dg/ipa/inline-1.c fail
Date: Mon, 27 Nov 2017 12:56:00 -0000
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--- Comment #1 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
g++.dg/pr79095-4.C also affected:
spawn -ignore SIGHUP /work/gcc/testsuite/g++2/../../xg++
-B/work/gcc/testsuite/g++2/../../ /source/gcc/testsuite/g++.dg/pr79095-4.C
-fno-diagnostics-show-caret -fdiagnostics-color=never -nostdinc++
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/source/libstdc++-v3/libsupc++ -I/source/libstdc++-v3/include/backward
-I/source/libstdc++-v3/testsuite/util -fmessage-length=0 -std=gnu++98 -Wall -O3
-fdump-tree-vrp2 -S -o pr79095-4.s
FAIL: g++.dg/pr79095-4.C -std=gnu++98 (test for warnings, line )
>From gcc-bugs-return-583216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 13:13:57 2017
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Subject: [Bug c++/81675] [6/7/8 Regression] attribute(noreturn) of destructor in :? not honored
Date: Mon, 27 Nov 2017 13:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81675
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Nov 27 13:13:22 2017
New Revision: 255167
URL: https://gcc.gnu.org/viewcvs?rev=255167&root=gcc&view=rev
Log:
PR c++/81675
* cp-gimplify.c (cp_fold) <case COND_EXPR>: Don't return immediately
for VOID_TYPE_P COND_EXPRs, instead fold the operands and if op0 is
INTEGER_CST, ensure that both op1 and op2 are non-NULL and fall
through into normal folding, otherwise just rebuild x if any op
changed.
* g++.dg/warn/pr81675.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/warn/pr81675.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-583215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 13:13:32 2017
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Subject: [Bug target/82066] #pragma GCC target documentation does not say it is implemented for aarch64
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Tamar Christina <tnfchris at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |tnfchris at gcc dot gnu.org
--- Comment #3 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
@Steve I believe this can be closed now can't it? or is there something left to
do?
>From gcc-bugs-return-583217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 13:24:41 2017
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Subject: [Bug target/58693] GCC aarch64 arm_neon.h missing intrinsics from ACLE 2.0
Date: Mon, 27 Nov 2017 13:24:00 -0000
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Tamar Christina <tnfchris at gcc dot gnu.org> changed:
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--- Comment #4 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
I believe this report should supersede this one
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71233
>From gcc-bugs-return-583218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 13:34:50 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
Date: Mon, 27 Nov 2017 13:34:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 42730
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42730&action=edit
WIP patch
What I have sitting in my tree. Steps to make this clean is
1) refactor things to record the original scalar reduction code somewhere
(add place in stmt vinfo?)
2) make it less awkward ...
3) somehow merge SLP reduction detection with the more generic path detection
(the cases that interest us are SLP reductions, I think the case with just
a path is handled already)
Oh, the patch exposes lots of ICEs, I didn't really finish it.
>From gcc-bugs-return-583219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 13:44:48 2017
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Subject: [Bug tree-optimization/83177] [7/8 Regression] ICE with -mmpx -fcheck-pointer-bounds + __builtin___bnd_narrow_ptr_bounds + _setjmp
Date: Mon, 27 Nov 2017 13:44:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
Status|UNCONFIRMED |NEW
Known to work| |6.4.1
Keywords| |needs-reduction
Last reconfirmed| |2017-11-27
Ever confirmed|0 |1
Summary|ICE with -mmpx |[7/8 Regression] ICE with
|-fcheck-pointer-bounds + |-mmpx
|__builtin___bnd_narrow_ptr_ |-fcheck-pointer-bounds +
|bounds + _setjmp |__builtin___bnd_narrow_ptr_
| |bounds + _setjmp
Target Milestone|--- |7.3
Known to fail| |7.2.1, 8.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Seems to work on the GCC 6 branch and when optimizing.
>From gcc-bugs-return-583220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 13:47:08 2017
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Subject: [Bug ipa/83179] [8 regression] gcc.dg/ipa/inline-1.c fail
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
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--- Comment #2 from Martin Jambor <jamborm at gcc dot gnu.org> ---
I see this too and thus confirmed.
>From gcc-bugs-return-583221-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 13:59:18 2017
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Subject: [Bug target/83158] [8 regression] gcc.target/i386/pr78057.c fail
Date: Mon, 27 Nov 2017 13:59:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Indeed it's related. We now have range-info for
x_16 = x_15(D) + 2;
and thus:
Visiting conditional with predicate: if (x_16 == 0)
With known ranges
x_16: [-2147483646, +INF]
...
Intersecting
~[0, 0] EQUIVALENCES: { x_16 } (1 elements)
and
[-2147483646, +INF]
to
[-2147483646, +INF] EQUIVALENCES: { x_16 } (1 elements)
arguably the newly chosen range is smaller ...
we don't have the ability (limitation of the equivalence representation)
to keep ~[0, 0] as equivalence and it wouldn't help in this case given
the info is later supposed to be taken from SSA_NAME_RANGE_INFO.
We do special-case ~[0, 0] in the range intersection code but only for
pointer-type sized ranges...
/* Choose the anti-range if it is ~[0,0], that range is special
enough to special case when vr1's range is relatively wide. */
else if (*vr0min == *vr0max
&& integer_zerop (*vr0min)
&& (TYPE_PRECISION (TREE_TYPE (*vr0min))
== TYPE_PRECISION (ptr_type_node))
&& TREE_CODE (vr1max) == INTEGER_CST
&& TREE_CODE (vr1min) == INTEGER_CST
&& (wi::clz (wi::to_wide (vr1max) - wi::to_wide (vr1min))
< TYPE_PRECISION (TREE_TYPE (*vr0min)) / 2))
;
thus a "fix" is (I guess I'm ok with that if it doesn't regress any testcase
we have):
Index: gcc/tree-vrp.c
===================================================================
--- gcc/tree-vrp.c (revision 255167)
+++ gcc/tree-vrp.c (working copy)
@@ -6024,8 +6024,6 @@ intersect_ranges (enum value_range_type
enough to special case when vr1's range is relatively wide. */
else if (*vr0min == *vr0max
&& integer_zerop (*vr0min)
- && (TYPE_PRECISION (TREE_TYPE (*vr0min))
- == TYPE_PRECISION (ptr_type_node))
&& TREE_CODE (vr1max) == INTEGER_CST
&& TREE_CODE (vr1min) == INTEGER_CST
&& (wi::clz (wi::to_wide (vr1max) - wi::to_wide (vr1min))
>From gcc-bugs-return-583222-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 14:15:45 2017
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Subject: [Bug target/58693] GCC aarch64 arm_neon.h missing intrinsics from ACLE 2.0
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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CC| |clyon at gcc dot gnu.org
--- Comment #5 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Well, I think bug #71233 has more details, and is more up-to-date.
>From gcc-bugs-return-583223-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 14:18:42 2017
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Subject: [Bug target/58693] GCC aarch64 arm_neon.h missing intrinsics from ACLE 2.0
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--- Comment #6 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Sorry, I phrased it incorrectly, I meant to say, bug #71233 should supersede
this one. As in deed it has more details and is more up to date.
>From gcc-bugs-return-583224-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 14:26:47 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81616
--- Comment #13 from Jan Hubicka <hubicka at ucw dot cz> ---
> So is this option still helping with the latest microcode? Not in this case at
> least.
It is on my TODO list to re-benchmark 256bit vectorization for Zen. I do not
think microcode is a big difference here. Using 256 bit vectors has advantage
of exposing more of parallelism but also disadvantage of requiring more
involved setup. So for loops that vectorize naturally (like matrix
multiplication) it can be win, while for loops that are difficult to vectorize
it is a loss. So I think the early benchmarks did not look consistent and it is
why 128bit mode was introduced.
It is not that different form vectorizing for K8 which had split SSE registers
in a similar fashion or for kabylake which splits 512 bit operations.
While rewriting the cost-model I tried to keep this in mind and more acurately
model the split operations, so it may be possible to switch to 256 by default.
Ideally vectorizer should make a deicsion whether 128 or 256 is win for
partiuclar loop but it doesn't seem to have infrastructure to do so.
My plan is to split current flag into two - preffer 128bit and assume
that registers are internally split and see if that is enough to get consistent
win for 256 bit vectorization.
Richi may know better.
Honza
>From gcc-bugs-return-583226-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 14:27:50 2017
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Subject: [Bug target/71233] [ARM, AArch64] missing AdvSIMD intrinsics
Date: Mon, 27 Nov 2017 14:27:00 -0000
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Tamar Christina <tnfchris at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |lennox at cs dot columbia.edu
--- Comment #16 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
*** Bug 58693 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-583225-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 14:27:49 2017
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Subject: [Bug target/58693] GCC aarch64 arm_neon.h missing intrinsics from ACLE 2.0
Date: Mon, 27 Nov 2017 14:27:00 -0000
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Tamar Christina <tnfchris at gcc dot gnu.org> changed:
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--- Comment #7 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Closing as duplicate of #71233
*** This bug has been marked as a duplicate of bug 71233 ***
>From gcc-bugs-return-583227-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 15:17:26 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Mon, 27 Nov 2017 15:17:00 -0000
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--- Comment #14 from Andrew Roberts <andrewm.roberts at sky dot com> ---
It would be nice if znver1 for -march and -mtune could be improved before the
gcc 8 release. At present -march=znver1 -mtune=znver1 looks be to about the
worst thing you could do, and not just on this vectorizable code. And given we
tell people to use -march=native which gives this, it would be nice to improve.
With the attached example switching to larger vectors still only gets to 200000
clocks, whereas other combinations get down to 116045
mult took 116045 clocks -march=corei7-avx -mtune=skylake
So there is more going on here than just the vector length.
If there is any testing to isolate other options I would be happy to help, just
point me in the right direction. If there are good (open) benchmarks I can
routinely test on a range of targets I would be happy to. I have ryzen,
haswell, skylake, arm, aarch64, etc.
>From gcc-bugs-return-583228-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 15:24:44 2017
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Subject: [Bug target/83158] [8 regression] gcc.target/i386/pr78057.c fail
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testing
Index: gcc/tree-vrp.c
===================================================================
--- gcc/tree-vrp.c (revision 255173)
+++ gcc/tree-vrp.c (working copy)
@@ -6021,11 +6021,13 @@ intersect_ranges (enum value_range_type
&& vrp_val_is_max (vr1max))
;
/* Choose the anti-range if it is ~[0,0], that range is special
- enough to special case when vr1's range is relatively wide. */
+ enough to special case when vr1's range is relatively wide.
+ At least for types bigger than int - this covers pointers
+ and arguments to functions like ctz. */
else if (*vr0min == *vr0max
&& integer_zerop (*vr0min)
&& (TYPE_PRECISION (TREE_TYPE (*vr0min))
- == TYPE_PRECISION (ptr_type_node))
+ >= TYPE_PRECISION (integer_type_node))
&& TREE_CODE (vr1max) == INTEGER_CST
&& TREE_CODE (vr1min) == INTEGER_CST
&& (wi::clz (wi::to_wide (vr1max) - wi::to_wide (vr1min))
>From gcc-bugs-return-583229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 15:27:10 2017
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Subject: [Bug target/83158] [8 regression] gcc.target/i386/pr78057.c fail
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Or rather
&& ((TYPE_PRECISION (TREE_TYPE (*vr0min))
>= TYPE_PRECISION (integer_type_node))
|| POINTER_TYPE_P (TREE_TYPE (*vr0min)))
targeting DOS real-mode might get you 16bit pointers but 32bit integers (not
sure if 16bit pointers are exposed as such for C).
>From gcc-bugs-return-583230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 15:30:27 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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--- Comment #15 from Jan Hubicka <hubicka at ucw dot cz> ---
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81616
>
> --- Comment #14 from Andrew Roberts <andrewm.roberts at sky dot com> ---
> It would be nice if znver1 for -march and -mtune could be improved before the
> gcc 8 release. At present -march=znver1 -mtune=znver1 looks be to about the
> worst thing you could do, and not just on this vectorizable code. And given we
> tell people to use -march=native which gives this, it would be nice to improve.
We benchmarked znver1 tuning quite thoroughly with spec2000, spec2006 and 2017
and istuation is not that bad.
In August, with -O2 native tuning is about 0.3% (for both in and fp) better
than generic (this does not include vectorization becuase of -O2 and keep in
mind that spec is often bound by memory, 0.3% difference is quite noticable).
All regressions in individual benchmarks were under 2% and some fixed since
then.
For -Ofast the difference is about 0.5% for integer with two notable
regressions
wich have WIP solutions for.
Integer/core tuning went worse than generic so things was as indtended.
I will quickly re-test 256bit vectorization with specfp2k (that is fast).
Please attach regressing testcases you have and I will take a look, too.
Honza
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Subject: [Bug ipa/83179] [8 regression] gcc.dg/ipa/inline-1.c fail
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Subject: [Bug ipa/83178] [8 regression] g++.dg/ipa/devirt-22.C fail
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/83164] [8 regression] internal compiler error: verify_gimple failed
Date: Mon, 27 Nov 2017 15:36:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to Gerald Pfeifer from comment #0)
[...]
> Also the diagnostics look quite odd, don't they?
[...]
If I strip out the line directives from the .i file, then I get:
ddeml.i:8322:28: error: type mismatch in pointer diff expression
static struct ddeml_thunk* DDEML_AddThunk(DWORD instId, DWORD pfn16)
^~~~~~~~~~~~~~
from this line in tree-cfg.c:
3996 error ("type mismatch in pointer diff expression");
which is less odd (though not great).
If I use stmt->location for the diagnostic (rather than the implicit use of
input_location), then I get the much more useful:
(gdb) call inform (stmt->location, "")
ddeml.i: In function ‘DDEML_AddThunk’:
ddeml.i:8342:61: note:
thunk->callback = (char *)WDML_InvokeCallback16 - (char
*)(&thunk->callback + 1);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-583233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 15:36:08 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Mon, 27 Nov 2017 15:36:00 -0000
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--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #13)
> > So is this option still helping with the latest microcode? Not in this case at
> > least.
>
> It is on my TODO list to re-benchmark 256bit vectorization for Zen. I do not
> think microcode is a big difference here. Using 256 bit vectors has
> advantage
> of exposing more of parallelism but also disadvantage of requiring more
> involved setup. So for loops that vectorize naturally (like matrix
> multiplication) it can be win, while for loops that are difficult to
> vectorize
> it is a loss. So I think the early benchmarks did not look consistent and it
> is
> why 128bit mode was introduced.
>
> It is not that different form vectorizing for K8 which had split SSE
> registers
> in a similar fashion or for kabylake which splits 512 bit operations.
>
> While rewriting the cost-model I tried to keep this in mind and more
> acurately
> model the split operations, so it may be possible to switch to 256 by
> default.
>
> Ideally vectorizer should make a deicsion whether 128 or 256 is win for
> partiuclar loop but it doesn't seem to have infrastructure to do so.
> My plan is to split current flag into two - preffer 128bit and assume
> that registers are internally split and see if that is enough to get
> consistent
> win for 256 bit vectorization.
>
> Richi may know better.
The vectorizer cannot currently evaluate both (or multiple) vector length
vectorization costs against each other. Doing so with the current
implementation would have prohibitive cost (basically do the analysis
phase twice and if unlucky and the "first" wins, re-do analysis phase
of the winner).
Hmm, maybe not _too_ bad in the end...
But first and foremost costing is not aware of split AVX256 penalties,
so I'm not sure if doing the above would help.
I can cook up some "quick" prototype (maybe hidden behind a --param
paywall) so one could benchmark such mode.
Is there interest?
> Honza
>From gcc-bugs-return-583236-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 15:38:25 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/83163] bootstrap comparison failure with --enable-languages=all,jit
Date: Mon, 27 Nov 2017 15:38:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The build was done on Fedora 25 with the system GCC, version 6.3.1 20161221
(Red Hat 6.3.1-1).
I don't see the failure with --enable-languages=c,c++,jit. Let me try to
narrow it down further.
>From gcc-bugs-return-583235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 15:38:08 2017
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Subject: [Bug middle-end/83164] [8 regression] internal compiler error: verify_gimple failed
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--- Comment #7 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
BZ mangled the underline a bit in comment #6; the caret is on the '-'
character, like this simplified version:
thunk->callback = LHS - RHS;
~~~~^~~~~
>From gcc-bugs-return-583237-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 15:56:38 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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--- Comment #17 from Andrew Roberts <andrewm.roberts at sky dot com> ---
The general consensus in userland is that the znver1 optimization is much worse
than 0.5%, or even 2% off. Most people are using -march=haswell if they care
about performance.
Just taking one part of one of my apps I see a 5% difference with
-march=haswell vs -march=znver1, and this is just general code (loading GL
extensions).
The trick is to remove system dependencies from things I could benchmark. If
there are no recommendations, I'll come up with some tests myself for various
workloads, and try across various march/tune combos.
I'll also look at some other real world benchmarks that are available online.
>From gcc-bugs-return-583238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 16:05:50 2017
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Subject: [Bug middle-end/83164] [8 regression] internal compiler error: verify_gimple failed
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is a checking ICE, not a user facing diagnostics. Not need to spend time
on anything but fixing the ICE.
>From gcc-bugs-return-583239-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 16:14:53 2017
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Subject: [Bug ipa/83179] [8 regression] gcc.dg/ipa/inline-1.c fail
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--- Comment #3 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Started with Honza's r255103.
>From gcc-bugs-return-583240-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 16:15:03 2017
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Subject: [Bug rtl-optimization/81019] [6/7/8 Regression] wrong code with -O -fno-tree-ccp
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r228320.
>From gcc-bugs-return-583241-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 16:19:59 2017
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Subject: [Bug tree-optimization/80198] [6/7/8 Regression] does not vectorize generic inplace integer operation
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--- Comment #10 from Jeffrey A. Law <law at redhat dot com> ---
Yea. The code that was recording NAME = NAME conditional equivalences was
largely disabled back in August. They'll only be recorded now if one name is
cheaper to compute than the other.
So if the conditional equivalences are still a problem with this BZ, then we
need to look at the costing of the SSA_NAME's defining statement.
>From gcc-bugs-return-583242-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 16:27:10 2017
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
Date: Mon, 27 Nov 2017 16:27:00 -0000
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----------------------------------------------------------------------------
CC| |andrey.y.guskov at intel dot com
--- Comment #8 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Also happens on Haswell and Silvermont.
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From: "lars@greiz-reinsdorf.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83180] New: MINGW: Linking to libpq.dll produced with MSVC-x64 generates invalid code
Date: Mon, 27 Nov 2017 16:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83180
Bug ID: 83180
Summary: MINGW: Linking to libpq.dll produced with MSVC-x64
generates invalid code
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 42731
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42731&action=edit
Test source code to link to libpq.dll
Hi! I'm a maintainer of the Ruby binding to PostgreSQL. I'm faced with a linker
issue when linking to PQgetvalue() in the libpq.dll for x64 provided by the
PostgreSQL project. The DLL in question is attached. It is part of the official
PostgreSQL download for Windows-x64:
https://get.enterprisedb.com/postgresql/postgresql-10.0-1-windows-x64.exe
The error can be reproduced by using the attached "segfault.c" file like so. It
fails when auto-import is disabled:
$ x86_64-w64-mingw32-gcc -o segfault.exe segfault.c
-IC:/PROGRA~1/POSTGR~1/10/include -LC:/PROGRA~1/POSTGR~1/10/lib
-Wl,--enable-auto-image-base,--disable-auto-import -lpq
C:\Users\kanis\AppData\Local\Temp\cce46Itr.o:segfault.c:(.text+0x11e):
undefined reference to `PQgetvalue'
collect2.exe: error: ld returned 1 exit status
When auto-import is enabled, then linking succeeds, but the generated code is
invalid:
$ x86_64-w64-mingw32-gcc -o segfault.exe segfault.c
-IC:/PROGRA~1/POSTGR~1/10/include -LC:/PROGRA~1/POSTGR~1/10/lib
-Wl,--enable-auto-image-base,--enable-auto-import -lpq
$ objdump -d segfault.exe
[...]
401650: 48 8b 45 f0 mov -0x10(%rbp),%rax
401654: 41 b8 00 00 00 00 mov $0x0,%r8d
40165a: ba 00 00 00 00 mov $0x0,%edx
40165f: 48 89 c1 mov %rax,%rcx
401662: e8 d9 17 00 00 callq 402e40 <PQgetlength>
401667: 89 45 ec mov %eax,-0x14(%rbp)
40166a: 8b 45 ec mov -0x14(%rbp),%eax
40166d: 89 c2 mov %eax,%edx
40166f: 48 8d 0d e4 29 00 00 lea 0x29e4(%rip),%rcx #
40405a <.rdata+0x5a>
401676: e8 25 16 00 00 callq 402ca0 <printf>
40167b: 48 8b 45 f0 mov -0x10(%rbp),%rax
40167f: 41 b8 00 00 00 00 mov $0x0,%r8d
401685: ba 00 00 00 00 mov $0x0,%edx
40168a: 48 89 c1 mov %rax,%rcx
40168d: e8 .byte 0xe8
000000000040168e <__fu0_PQgetvalue>:
40168e: 66 6d insw (%dx),%es:(%rdi)
401690: 00 00 add %al,(%rax)
401692: 48 89 45 e0 mov %rax,-0x20(%rbp)
401696: 48 8b 45 e0 mov -0x20(%rbp),%rax
40169a: 48 89 c2 mov %rax,%rdx
40169d: 48 8d 0d bf 29 00 00 lea 0x29bf(%rip),%rcx #
404063 <.rdata+0x63>
4016a4: e8 f7 15 00 00 callq 402ca0 <printf>
[...]
$ ./segfault.exe
conn: 00000000007AA7D0
PQlibVersion: 100000
res: 00000000007B7120
len: 3
... The call to PQgetlength() and printf() runs through, but it segfaults on
0x40168d, because the address of callq (opcode 0xe8) is invalid. Obviously the
debug information also doesn't fit to the produced code, so that the opcodes
are not properly decoded.
Other functions like PQgetlength() are not affected. They link fine with
auto-import being enabled or disabled. The only function with this odd behavior
is PQgetvalue().
As a workaround "-l:libpq.lib" can be used to trigger linking to libpq.dll per
MSVC import library. This works for gcc-7.2.0, but older versions of gcc
(4.7.2) fail to link to any function of a MSVC produced libpq.lib file (for
some obviously fixed reason).
The issue doesn't appear when building for 32 bit x86 or when linking to a
libpq.dll produced by MINGW.
The root issue is also reproducible on Appveyor:
https://ci.appveyor.com/project/larskanis/ruby-pg-xa3f5/build/1.0.65/job/b06idaids8el773r
My environment:
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.2.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../gcc-7.2.0/configure --prefix=/mingw64
--with-local-prefix=/mingw64/local --build=x86_64-w64-mingw32
--host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32
--with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include
--libexecdir=/mingw64/lib --enable-bootstrap --with-arch=x86-64
--with-tune=generic --enable-languages=c,lto,c++,objc,obj-c++,fortran,ada
--enable-shared --enable-static --enable-libatomic --enable-threads=posix
--enable-graphite --enable-fully-dynamic-string --enable-libstdcxx-time=yes
--disable-libstdcxx-pch --disable-libstdcxx-debug --disable-isl-version-check
--enable-lto --enable-libgomp --disable-multilib --enable-checking=release
--disable-rpath --disable-win32-registry --disable-nls --disable-werror
--disable-symvers --with-libiconv --with-system-zlib --with-gmp=/mingw64
--with-mpfr=/mingw64 --with-mpc=/mingw64 --with-isl=/mingw64
--with-pkgversion='Rev1, Built by MSYS2 project'
--with-bugurl=https://sourceforge.net/projects/msys2 --with-gnu-as
--with-gnu-ld
Thread model: posix
gcc version 7.2.0 (Rev1, Built by MSYS2 project)
$ ver
Microsoft Windows [Version 10.0.14393]
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83180] MINGW: Linking to libpq.dll produced with MSVC-x64 generates invalid code
Date: Mon, 27 Nov 2017 16:40:00 -0000
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--- Comment #1 from Lars Kanis <lars@greiz-reinsdorf.de> ---
Created attachment 42732
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42732&action=edit
The DLL in question produced by MSVC
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/79392] MinGW-w64 backend: programs built with --coverage do not create *.gcda files
Date: Mon, 27 Nov 2017 16:41:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |WAITING
Resolution|WORKSFORME |---
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Maybe it's a Debian-specific bug then. Please provide the missing information
requested by https://gcc.gnu.org/bugs/
>From gcc-bugs-return-583246-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 16:43:13 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83181] New: [C++17] Invalid deduction guide accepted
Date: Mon, 27 Nov 2017 16:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83181
Bug ID: 83181
Summary: [C++17] Invalid deduction guide accepted
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Keywords: accepts-invalid
Severity: normal
Priority: P3
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template<bool> struct enable_if { using type = void; };
template<> struct enable_if<false> { };
template<typename T> struct is_foo { static const bool value = false; };
template<typename T>
using RequireFoo = typename enable_if<is_foo<T>::value>::type;
template<typename T> struct init_list { };
template<typename T, typename A> struct X
{
X(init_list<T>, A) { }
};
template<typename T, typename A, /* typename = */ RequireFoo<A>>
X(init_list<T>, A) -> X<T, A>;
struct Alloc { };
template<> struct is_foo<Alloc> { static const bool value = true; };
int main()
{
init_list<int> l;
Alloc a;
X x(l, a);
}
The RequireFoo<A> template parameter is invalid (it's missing "typename =") but
G++ accepts it. CLang rejects it with this error:
prog.cc:15:49: error: deduction guide template contains a template parameter
that cannot be deduced
template<typename T, typename A, RequireFoo<A>> X(init_list<T>, A) -> X<T, A>;
^
prog.cc:15:47: note: non-deducible template parameter (anonymous)
template<typename T, typename A, RequireFoo<A>> X(init_list<T>, A) -> X<T, A>;
^
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83179] [8 regression] gcc.dg/ipa/inline-1.c fail
Date: Mon, 27 Nov 2017 17:08:00 -0000
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--- Comment #4 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
32-bit SPEC CPU2017::507/607 also affected:
during GIMPLE pass: vect
gnu/regex.c: In function 'regexec.constprop':
gnu/regex.c:5751:1: internal compiler error: in vectorizable_mask_load_store,
at tree-vect-stmts.c:2349
regexec (preg, string, nmatch, pmatch, eflags)
^
0x74786d vectorizable_mask_load_store
../../../gcc/gcc/tree-vect-stmts.c:2348
0x7510ad vectorizable_call
../../../gcc/gcc/tree-vect-stmts.c:2652
0xe6ee48 vect_transform_stmt(gimple*, gimple_stmt_iterator*, bool*, _slp_tree*,
_slp_instance*)
../../../gcc/gcc/tree-vect-stmts.c:8826
0x760faa vect_transform_loop(_loop_vec_info*)
../../../gcc/gcc/tree-vect-loop.c:7559
0xe8355d vectorize_loops()
../../../gcc/gcc/tree-vectorizer.c:761
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper: fatal error: g++ returned 1 exit status
compilation terminated.
/bin/ld: lto-wrapper failed
collect2: error: ld returned 1 exit status
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From: "mgulick at mathworks dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/83173] C preprocessor generates incorrect linemarkers
Date: Mon, 27 Nov 2017 17:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83173
--- Comment #1 from Mike Gulick <mgulick at mathworks dot com> ---
Just a minor update. I re-tested the reproducer on gcc 5.4 as well as 4.9.2,
and the issue is present in both of those. I had originally thought the bug
was not present in gcc 5.4 or earlier, however this is likely because the
source code I was testing it on was not pushing the line map source location >
0x60000000 in these versions of the compiler.
>From gcc-bugs-return-583249-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:14:00 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/81019] [6/7/8 Regression] wrong code with -O -fno-tree-ccp
Date: Mon, 27 Nov 2017 17:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81019
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-27
CC| |aoliva at gcc dot gnu.org,
| |segher at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
/* PR rtl-optimization/81019 */
/* { dg-do run } */
/* { dg-options "-O -fno-tree-ccp" } */
unsigned long long __attribute__((noinline, noclone))
foo (unsigned char a, unsigned short b, unsigned c, unsigned long long d,
unsigned char e, unsigned short f, unsigned g, unsigned long long h)
{
g = e;
c &= 0 < d;
b *= d;
g ^= -1;
g &= 1;
c |= 1;
a -= 0 < g;
g >>= 1;
f = b | (f >> b);
return a + c + d + f + g + h;
}
int
main (void)
{
if (foo (0, 0, 0, 0, 0, 0, 0, 0) != 0x100)
__builtin_abort ();
return 0;
}
This is indeed miscompiled in the combiner if the r249850 change is reverted
(which changes costs and thus combiner decides to try different optimizations).
With the change reverted, the g &= 1 masking is lost.
Alex/Segher, what is the current state of the patch?
I see https://gcc.gnu.org/ml/gcc-patches/2017-07/msg00363.html as the last mail
on the subject.
>From gcc-bugs-return-583250-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:15:48 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/83182] New: undefined behavior in generic_wide_int due to missing input validation
Date: Mon, 27 Nov 2017 17:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83182
Bug ID: 83182
Summary: undefined behavior in generic_wide_int due to missing
input validation
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
A number of members of the wide_int classes use the expression (LEN - 1) as an
index into a small member array. For example:
template <typename storage>
inline HOST_WIDE_INT
generic_wide_int <storage>::sign_mask () const
{
unsigned int len = this->get_len ();
unsigned HOST_WIDE_INT high = this->get_val ()[len - 1];
...
}
However, the wide_int constructors do not sufficiently validate their
preconditions. As a result, when the get_len () function resturns zero the
behavior of the functions that use the decremented result as an index is
undefined.
The problem can be triggered by the following test case. When the use of the
invalid offset_int is far removed from its construction it can be difficult to
debug. To make debugging easier, the constructor and/or the wi::to_offset
function should validate their input when checking is enabled. Functions that
use the result of (LEN - 1) as an index should also assert that the result is
valid.
{
// Create an expression that doesn't evaluate to INTEGER_CST.
tree x = build2 (TRUNC_DIV_EXPR, integer_type_node, integer_one_node,
integer_zero_node);
offset_int a = wi::to_offset (integer_one_node);
// Create an invalid offset_int. The function expects an INTEGER_CST
// but doesn't do any input validation..
offset_int b = wi::to_offset (x);
// Trigger a SIGSEGV.
if (a < b)
return;
}
Program received signal SIGSEGV, Segmentation fault.
0x00000000012f255e in selt (a=0x7fffffffcaf0, len=0, blocks_needed=2,
small_prec=0, index=4294967295, sgn=SIGNED) at
/ssd/src/gcc/svn/gcc/wide-int.cc:404
404 val = SIGN_MASK (a[len - 1]);
(gdb) p len
$1 = 0
(gdb) bt
0x00000000012f255e in selt (a=0x7fffffffcaf0, len=0, blocks_needed=2,
small_prec=0, index=4294967295, sgn=SIGNED) at
/ssd/src/gcc/svn/gcc/wide-int.cc:404
404 val = SIGN_MASK (a[len - 1]);
(gdb) bt
#0 0x00000000012f255e in selt (a=0x7fffffffcaf0, len=0, blocks_needed=2,
small_prec=0, index=4294967295, sgn=SIGNED) at
/ssd/src/gcc/svn/gcc/wide-int.cc:404
#1 0x00000000012f27c4 in wi::lts_p_large (op0=0x7fffffffcad0, op0len=1,
precision=128, op1=0x7fffffffcaf0, op1len=0) at
/ssd/src/gcc/svn/gcc/wide-int.cc:480
#2 0x0000000000866be1 in
wi::lts_p<generic_wide_int<fixed_wide_int_storage<128> >,
generic_wide_int<fixed_wide_int_storage<128> > > (x=..., y=...) at
/ssd/src/gcc/svn/gcc/wide-int.h:1835
#3 0x00000000008664e5 in operator<
<generic_wide_int<fixed_wide_int_storage<128> >,
generic_wide_int<fixed_wide_int_storage<128> > > (x=..., y=...) at
/ssd/src/gcc/svn/gcc/wide-int.h:3124
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Subject: [Bug bootstrap/81470] [8 Regression] Bootstrap comparison failures in gcc/ada
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
r247301 is the switch to native exceptions for the compiler proper and we know
that this works on 64-bit Windows. How do you configure the compiler?
>From gcc-bugs-return-583252-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:21:11 2017
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Subject: [Bug bootstrap/81470] [8 Regression] Bootstrap comparison failures in gcc/ada
Date: Mon, 27 Nov 2017 17:21:00 -0000
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--- Comment #6 from Rainer Emrich <rainer@emrich-ebersheim.de> ---
(In reply to Eric Botcazou from comment #5)
> r247301 is the switch to native exceptions for the compiler proper and we
> know that this works on 64-bit Windows. How do you configure the compiler?
../../../../../../opt/devel/gnu/src/gcc-mingw-w64/gcc-8.0.0/configure
--prefix=/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-8.0.0
--with-gnu-as
--with-as=/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-8.0.0/bin/as
--with-gnu-ld
--with-ld=/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-8.0.0/bin/ld
--build=x86_64-w64-mingw32 --enable-threads=posix
--enable-languages=c,c++,ada,lto
--with-gmp-include=/opt/devel/SCRATCH/tmp.8Ly5oNHx4u/install/include
--with-gmp-lib=/opt/devel/SCRATCH/tmp.8Ly5oNHx4u/install/lib64
--with-mpfr-include=/opt/devel/SCRATCH/tmp.8Ly5oNHx4u/install/include
--with-mpfr-lib=/opt/devel/SCRATCH/tmp.8Ly5oNHx4u/install/lib64
--with-mpc-include=/opt/devel/SCRATCH/tmp.8Ly5oNHx4u/install/include
--with-mpc-lib=/opt/devel/SCRATCH/tmp.8Ly5oNHx4u/install/lib64
--with-isl-include=/opt/devel/SCRATCH/tmp.8Ly5oNHx4u/install/include
--with-isl-lib=/opt/devel/SCRATCH/tmp.8Ly5oNHx4u/install/lib64
--with-local-prefix=/opt/devel/tec/devel/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-8.0.0
--enable-libgomp --enable-fully-dynamic-string --disable-multilib
--enable-checking=release --disable-werror --with-sysroot=/x86_64-w64-trunk
>From gcc-bugs-return-583253-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:22:53 2017
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Subject: [Bug tree-optimization/82604] [8 Regression] SPEC CPU2006 410.bwaves ~50% performance regression with trunk@253679 when ftree-parallelize-loops is used
Date: Mon, 27 Nov 2017 17:22:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The #c5 approach sounds better to me, we can have memsets in the IL even from
the user, so would be nice if we handled those in the dr analysis too.
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Subject: [Bug c/83172] -Wstack-size= doesn't detect the correct stack size with VLA or alloca
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Ever confirmed|0 |1
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
What happens for -Wvla-larger-than= if you use -O0 or -O1 instead of -O3?
>From gcc-bugs-return-583255-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:25:05 2017
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Subject: [Bug fortran/78238] [7/8 Regression] [OOP] ICE: verify_gimple failed, with -fdefault-integer-8
Date: Mon, 27 Nov 2017 17:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78238
G. Steinmetz <gscfq@t-online.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gscfq@t-online.de
--- Comment #9 from G. Steinmetz <gscfq@t-online.de> ---
While gcc configured with --enable-checking=yes,
the ICE has changed between 20170924 (ICE: verify_gimple failed)
and 20171015 (ICE in decompose), today :
$ gfortran-8-20171126 -fdefault-integer-8 -c z1.f90
z1.f90:1:0:
program p
internal compiler error: in decompose, at wide-int.h:935
0x617319 wi::int_traits<generic_wide_int<wide_int_storage> >::decompose(long*,
unsigned int, generic_wide_int<wide_int_storage> const&)
../../gcc/wide-int.h:935
0x1061853 wi::int_traits<generic_wide_int<wide_int_storage> >::decompose(long*,
unsigned int, generic_wide_int<wide_int_storage> const&)
../../gcc/tree.h:3472
0x1061853 wide_int_ref_storage<true,
false>::wide_int_ref_storage<generic_wide_int<wide_int_storage>
>(generic_wide_int<wide_int_storage> const&, unsigned int)
../../gcc/wide-int.h:983
0x1061853 generic_wide_int<wide_int_ref_storage<true, false>
>::generic_wide_int<generic_wide_int<wide_int_storage>
>(generic_wide_int<wide_int_storage> const&, unsigned int)
../../gcc/wide-int.h:760
0x1061853 wi::binary_traits<generic_wide_int<wide_int_ref_storage<false, false>
>, generic_wide_int<wide_int_storage>,
wi::int_traits<generic_wide_int<wide_int_ref_storage<false, false> >
>::precision_type, wi::int_traits<generic_wide_int<wide_int_storage>
>::precision_type>::result_type
wi::bit_and_not<generic_wide_int<wide_int_ref_storage<false, false> >,
generic_wide_int<wide_int_storage>
>(generic_wide_int<wide_int_ref_storage<false, false> > const&,
generic_wide_int<wide_int_storage> const&)
../../gcc/wide-int.h:2250
0x1061853 gimple_simplify_10
<path>/gcc/gimple-match.c:1311
0x10e2111 gimple_simplify_EQ_EXPR
<path>/gcc/gimple-match.c:62577
0x106b725 gimple_simplify
<path>/gcc/gimple-match.c:72958
0x106cc0b gimple_resimplify2(gimple**, code_helper*, tree_node*, tree_node**,
tree_node* (*)(tree_node*))
../../gcc/gimple-match-head.c:165
0x11405ba gimple_simplify(gimple*, code_helper*, tree_node**, gimple**,
tree_node* (*)(tree_node*), tree_node* (*)(tree_node*))
../../gcc/gimple-match-head.c:763
0xa0b041 fold_stmt_1
../../gcc/gimple-fold.c:4631
0xa2d7f2 gimplify_cond_expr
../../gcc/gimplify.c:4009
0xa23fe4 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11297
0xa28816 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6556
0xa23a1b gimplify_statement_list
../../gcc/gimplify.c:1736
0xa23a1b gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11769
0xa28816 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6556
0xa29b0d gimplify_bind_expr
../../gcc/gimplify.c:1294
0xa241aa gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11541
0xa28816 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6556
>From gcc-bugs-return-583256-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:26:25 2017
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Subject: [Bug fortran/83183] New: Out of memory with option -finit-derived
Date: Mon, 27 Nov 2017 17:26:00 -0000
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Bug ID: 83183
Summary: Out of memory with option -finit-derived
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With ./gcc/testsuite/gfortran.dg/move_alloc_17.f90 or this reduction :
$ cat z1.f90
program p
type :: linked_list
type(linked_list), allocatable :: link
integer :: value
end type
type(linked_list) :: test
allocate(test % link)
end program
$ gfortran-8-20171126 -c z1.f90
$
$ ulimit -v 4000000 # optional
$
$ gfortran-8-20171126 -c z1.f90 -finit-derived
f951: out of memory allocating 80 bytes after a total of 3240341504 bytes
>From gcc-bugs-return-583258-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:28:51 2017
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Subject: [Bug tree-optimization/82604] [8 Regression] SPEC CPU2006 410.bwaves ~50% performance regression with trunk@253679 when ftree-parallelize-loops is used
Date: Mon, 27 Nov 2017 17:28:00 -0000
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--- Comment #8 from amker at gcc dot gnu.org ---
(In reply to Jakub Jelinek from comment #7)
> The #c5 approach sounds better to me, we can have memsets in the IL even
> from the user, so would be nice if we handled those in the dr analysis too.
Yeah, I plan to look into that way after interchange stuff, unless Richi gets
to it earlier :)
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Subject: [Bug bootstrap/81470] [8 Regression] Bootstrap comparison failures in gcc/ada
Date: Mon, 27 Nov 2017 17:28:00 -0000
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--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
And what's the output of 'gcc -v' for the base compiler?
>From gcc-bugs-return-583259-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:29:00 2017
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Subject: [Bug fortran/83184] New: Out of memory or ICE with option -fdec
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Bug ID: 83184
Summary: Out of memory or ICE with option -fdec
Product: gcc
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With invalid code and option -fdec-structure or -fdec :
$ cat z1.f90
program p
structure /s/
integer n(..) /1/
end structure
end
$ cat z2.f90
program p
structure /s/
integer n(..) /2*1/
end structure
end
$ gfortran-8-20171126 -c z1.f90 -fdec
f951: out of memory allocating 18446744073709551600 bytes after a total of
499712 bytes
---
Configured with --enable-checking=yes :
$ gfortran-8-20171126-chk -c z1.f90
z1.f90:2:12:
structure /s/
1
Error: STRUCTURE at (1) is a DEC extension, enable with '-fdec-structure'
z1.f90:4:6:
end structure
1
Error: Expecting END PROGRAM statement at (1)
z1.f90:3:19:
integer n(..) /1/
1
Error: Assumed-rank array at (1) must be a dummy argument
in gfc_format_decoder, at fortran/error.c:934
0x6be93e gfc_format_decoder
../../gcc/fortran/error.c:934
0x152fe43 pp_format(pretty_printer*, text_info*)
../../gcc/pretty-print.c:1351
0x152033b diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
../../gcc/diagnostic.c:984
0x6be7a7 gfc_error_opt
../../gcc/fortran/error.c:1299
0x6bfce0 gfc_error(char const*, ...)
../../gcc/fortran/error.c:1328
0x7279f6 resolve_variable
../../gcc/fortran/resolve.c:5267
0x7279f6 gfc_resolve_expr(gfc_expr*)
../../gcc/fortran/resolve.c:6706
0x72b238 resolve_data_variables
../../gcc/fortran/resolve.c:15504
0x733f30 resolve_data
../../gcc/fortran/resolve.c:15529
0x733f30 resolve_types
../../gcc/fortran/resolve.c:16356
0x72f6ac gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.c:16445
0x71903a resolve_all_program_units
../../gcc/fortran/parse.c:6031
0x71903a gfc_parse_file()
../../gcc/fortran/parse.c:6281
0x75e67f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug c/83185] New: ICE with -fsanitizedress in build_simple_mem_ref_loc, at tree.c:4696
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Bug ID: 83185
Summary: ICE with -fsanitize=address in
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With option -fsanitize=address and -Os|1+ :
$ cat z1.c
#include <stdarg.h>
void
f (int i, ...)
{
va_list aps[g()];
va_start (aps[4], i);
}
$ gcc-8-20171126 -c z1.c -O2 -fsanitize=address
z1.c: In function 'f':
z1.c:6:15: warning: implicit declaration of function 'g'
[-Wimplicit-function-declaration]
va_list aps[g()];
^
during RTL pass: expand
In file included from z1.c:1:
z1.c:7:3: internal compiler error: in build_simple_mem_ref_loc, at tree.c:4696
va_start (aps[4], i);
^~~~~~~~
0xd037df build_simple_mem_ref_loc(unsigned int, tree_node*)
../../gcc/tree.c:4696
0xd78a55 ix86_va_start
../../gcc/config/i386/i386.c:9803
0x72f443 expand_builtin_va_start
../../gcc/builtins.c:4819
0x72f443 expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int)
../../gcc/builtins.c:7115
0x8352d8 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:10851
0x749f8c expand_expr
../../gcc/expr.h:276
0x749f8c expand_call_stmt
../../gcc/cfgexpand.c:2673
0x749f8c expand_gimple_stmt_1
../../gcc/cfgexpand.c:3607
0x749f8c expand_gimple_stmt
../../gcc/cfgexpand.c:3773
0x74b0d3 expand_gimple_basic_block
../../gcc/cfgexpand.c:5772
0x7503d6 execute
../../gcc/cfgexpand.c:6373
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Subject: [Bug c++/82336] [6/7/8 Regression] GCC requires but does not emit defaulted constructors in certain cases
Date: Mon, 27 Nov 2017 17:35:00 -0000
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--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
When checking the default arg during parsing, we perform an implicit conversion
inside an unevaluated_operand context. That's needed to fix 54198, where an
ill-formed instantiation occurs otherwise.
However, here, that implicit conversion is altering arg itself, via
reshape_init, and we lose an enclosing target_expr.
>From gcc-bugs-return-583262-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:40:14 2017
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From: "sudi.das at arm dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
Date: Mon, 27 Nov 2017 17:40:00 -0000
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Sudakshina Das <sudi.das at arm dot com> changed:
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--- Comment #9 from Sudakshina Das <sudi.das at arm dot com> ---
Confirmed on aarch64-none-linux-gnu
>From gcc-bugs-return-583264-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:42:51 2017
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From: "hao.hou at utah dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83172] -Wstack-size= doesn't detect the correct stack size with VLA or alloca
Date: Mon, 27 Nov 2017 17:42:00 -0000
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--- Comment #2 from Hao Hou <hao.hou at utah dot edu> ---
(In reply to Eric Botcazou from comment #1)
> What happens for -Wvla-larger-than= if you use -O0 or -O1 instead of -O3?
The same result:
$ gcc-7 -Wvla-larger-than=128 -Wstack-usage=102400 -O0 -c t.c
t.c: In function ‘stack_usage_only’:
t.c:23:5: warning: stack usage might be unbounded [-Wstack-usage=]
int stack_usage_only(unsigned x)
^~~~~~~~~~~~~~~~
t.c: In function ‘alloca_fails_even_with_const’:
t.c:32:5: warning: stack usage might be unbounded [-Wstack-usage=]
int alloca_fails_even_with_const()
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
-O1 results the same.
>From gcc-bugs-return-583263-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:42:29 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/81020] [6/7/8 Regression] wrong code with -O -fno-tree-bit-ccp -fno-tree-coalesce-vars -fno-tree-vrp
Date: Mon, 27 Nov 2017 17:42:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This was fixed with r254875. Before that combine was throwing away the masking
by 1 and testing against 0, effectively replacing the
u32_1 &= 1;
u32_0 |= 0 < u32_1;
with
u32_0 |= u32_1;
I'll add the testcase and close.
>From gcc-bugs-return-583265-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:43:31 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/83180] MINGW: Linking to libpq.dll produced with MSVC-x64 generates invalid code
Date: Mon, 27 Nov 2017 17:43:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I suspect this is a binutils bug and should be reported to them
(https://sourceware.org/bugzilla/ ).
>From gcc-bugs-return-583266-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:50:26 2017
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Subject: [Bug tree-optimization/46186] Clang creates code running 1600 times faster than gcc's
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AK <hiraditya at msn dot com> changed:
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--- Comment #27 from AK <hiraditya at msn dot com> ---
Seems PR65855 is related to this. btw, it may be worthwhile to try the patch
posted by Sebastian https://gcc.gnu.org/bugzilla/attachment.cgi?id=22201
>From gcc-bugs-return-583267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:56:20 2017
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Subject: [Bug fortran/83184] Out of memory or ICE with option -fdec
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed on 6.4.0, 7.2.0, and trunk (8.0), configured with/without
--enable-checking=yes.
>From gcc-bugs-return-583268-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:58:16 2017
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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/83179] [8 regression] gcc.dg/ipa/inline-1.c fail
Date: Mon, 27 Nov 2017 17:58:00 -0000
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--- Comment #5 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Andrey, what makes you think that the g++.dg/pr79095-4.C and regex.c
issues are related to dump scan failure of ipa/inline-1.c?
>From gcc-bugs-return-583269-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 17:59:50 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83183] Out of memory with option -finit-derived
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I get an ICE
gfortran: internal compiler error: Segmentation fault: 11 (program f951)
with both 7.2.0 and trunk (8.0).
>From gcc-bugs-return-583270-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 18:24:47 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83170] ice in verify_use with -O3
Date: Mon, 27 Nov 2017 18:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83170
Sunil Pandey <skpgkp1 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |skpgkp1 at gmail dot com
--- Comment #3 from Sunil Pandey <skpgkp1 at gmail dot com> ---
Seems like I hit the same bug with following test case. It appear during
GCompris and mednafen application build with GCC8.
$cat book.i.c
a;
char b[8];
c() {
int d = 0;
for (; d < 2; d++) {
b[d] = 5;
b[4 + d] = a >> d * 8;
}
}
$gcc --version
gcc (GCC) 8.0.0 20171126 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$gcc -O2 -c -o book.i.c.o book.i.c -w
during GIMPLE pass: store-merging
book.i.c: In function ‘c’:
book.i.c:3:1: internal compiler error: Segmentation fault
c() {
^
0xd1e4ff crash_signal
../../gcc-main.3O1I/gcc/toplev.c:325
0x7ffff713a71f ???
/usr/src/debug/glibc-2.26-65-ga76376df7c/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0xebac4b verify_use
../../gcc-main.3O1I/gcc/tree-ssa.c:864
0x72478b verify_ssa(bool, bool)
../../gcc-main.3O1I/gcc/tree-ssa.c:1141
0xc50eed execute_function_todo
../../gcc-main.3O1I/gcc/passes.c:2001
0xc5184e execute_todo
../../gcc-main.3O1I/gcc/passes.c:2048
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-583271-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 18:40:06 2017
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
Date: Mon, 27 Nov 2017 18:40:00 -0000
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Sunil Pandey <skpgkp1 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |skpgkp1 at gmail dot com
--- Comment #10 from Sunil Pandey <skpgkp1 at gmail dot com> ---
Seems like I hit the same bug while compiling mariadb with GCC8.
$cat CMap.i.cc
void a() {
int b = 0;
for (; b < 256; ++b)
a();
}
$g++ --version
g++ (GCC) 8.0.0 20171127 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$g++ -O3 -o CMap.i.cc.o -c CMap.i.cc
during IPA pass: inline
CMap.i.cc: In function ‘void a()’:
CMap.i.cc:1:6: internal compiler error: in from_gcov_type, at
profile-count.h:676
void a() {
^
0x712c42 estimate_bb_frequencies(bool)
../../gcc-main.3O1J/gcc/profile-count.h:676
0xe73137 rebuild_frequencies()
../../gcc-main.3O1J/gcc/predict.c:3911
0xe59904 execute_function_todo
../../gcc-main.3O1J/gcc/passes.c:1975
0xe5a28e execute_todo
../../gcc-main.3O1J/gcc/passes.c:2048
0x70fc43 execute_one_ipa_transform_pass
../../gcc-main.3O1J/gcc/passes.c:2245
0x70fc43 execute_all_ipa_transforms()
../../gcc-main.3O1J/gcc/passes.c:2281
0xba1a8a cgraph_node::expand()
../../gcc-main.3O1J/gcc/cgraphunit.c:2132
0xba2cab expand_all_functions
../../gcc-main.3O1J/gcc/cgraphunit.c:2275
0xba2cab symbol_table::compile()
../../gcc-main.3O1J/gcc/cgraphunit.c:2623
0xba4fc9 symbol_table::compile()
../../gcc-main.3O1J/gcc/cgraphunit.c:2537
0xba4fc9 symbol_table::finalize_compilation_unit()
../../gcc-main.3O1J/gcc/cgraphunit.c:2716
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-583272-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 19:13:56 2017
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From: "skpgkp1 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83186] New: [8 regression] internal compiler error: in build_address, at cp/typeck.c:5667
Date: Mon, 27 Nov 2017 19:13:00 -0000
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Bug ID: 83186
Summary: [8 regression] internal compiler error: in
build_address, at cp/typeck.c:5667
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Reporter: skpgkp1 at gmail dot com
Target Milestone: ---
It appear with webtoolkit application(wt) build with GCC8. It works fine with
GCC7.2.1. Following are steps to reproduce.
$ cat WDate.i.C
class a {
operator unsigned();
};
template <class> void b() { static_cast<unsigned>(a{}); }
$g++ --version
g++ (GCC) 8.0.0 20171127 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$g++ -O0 -o WDate.i.C.o -c WDate.i.C
WDate.i.C: In function ‘void b()’:
WDate.i.C:4:54: internal compiler error: in build_address, at cp/typeck.c:5667
template <class> void b() { static_cast<unsigned>(a{}); }
^
0x63fed3 build_address(tree_node*)
../../gcc-main.3O1J/gcc/cp/typeck.c:5667
0x8e4ce5 add_function_candidate
../../gcc-main.3O1J/gcc/cp/call.c:2158
0x8e5eff add_candidates
../../gcc-main.3O1J/gcc/cp/call.c:5514
0x8e207e add_candidates
../../gcc-main.3O1J/gcc/cp/call.c:5425
0x8e207e build_user_type_conversion_1
../../gcc-main.3O1J/gcc/cp/call.c:3841
0x8e34a9 implicit_conversion
../../gcc-main.3O1J/gcc/cp/call.c:1889
0x8e8295 perform_direct_initialization_if_possible(tree_node*, tree_node*,
bool, int)
../../gcc-main.3O1J/gcc/cp/call.c:10635
0xa9ed67 build_static_cast_1
../../gcc-main.3O1J/gcc/cp/typeck.c:6959
0xa9f9a4 build_static_cast(tree_node*, tree_node*, int)
../../gcc-main.3O1J/gcc/cp/typeck.c:7141
0x9eebb0 cp_parser_postfix_expression
../../gcc-main.3O1J/gcc/cp/parser.c:6698
0x9f10fa cp_parser_unary_expression
../../gcc-main.3O1J/gcc/cp/parser.c:8365
0x9d295f cp_parser_cast_expression
../../gcc-main.3O1J/gcc/cp/parser.c:9133
0x9d3147 cp_parser_binary_expression
../../gcc-main.3O1J/gcc/cp/parser.c:9234
0x9d4ad4 cp_parser_assignment_expression
../../gcc-main.3O1J/gcc/cp/parser.c:9521
0x9d51ba cp_parser_expression
../../gcc-main.3O1J/gcc/cp/parser.c:9690
0x9d6e98 cp_parser_expression_statement
../../gcc-main.3O1J/gcc/cp/parser.c:11208
0x9dcb16 cp_parser_statement
../../gcc-main.3O1J/gcc/cp/parser.c:11024
0x9dda50 cp_parser_statement_seq_opt
../../gcc-main.3O1J/gcc/cp/parser.c:11351
0x9ddb27 cp_parser_compound_statement
../../gcc-main.3O1J/gcc/cp/parser.c:11305
0x9f49f0 cp_parser_function_body
../../gcc-main.3O1J/gcc/cp/parser.c:21841
Please submit a full bug report,
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Please include the complete backtrace with any bug report.
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## Work fine with GCC 7.
$g++ --version
g++ (GCC) 7.2.1 20171127
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$g++ -O0 -o WDate.i.C.o -c WDate.i.C
$echo $?
0
>From gcc-bugs-return-583273-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 19:21:49 2017
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Subject: [Bug fortran/83076] [8 Regression] ICE in gfc_deallocate_scalar_with_status, at fortran/trans.c:1598
Date: Mon, 27 Nov 2017 19:21:00 -0000
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--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 42733
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42733&action=edit
A partial fix for the PR
This fixes the testcase and, indeed, some more elaborate versions. However,
coarray_allocate_5.f08 with the type 'foo' declared in a module offends gimple
horribly. It appears that the vtable is completely screwed up such that
accessing 'copy' gets 'def_init' instead.
That said, this does at least regtest OK.
Paul
>From gcc-bugs-return-583274-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 19:25:46 2017
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Subject: [Bug c++/83058] [6/7/8 Regression] ICE on C++ code with negative array index: in warn_placement_new_too_small, at cp/init.c:2666
Date: Mon, 27 Nov 2017 19:25:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2017-11/msg02324.html
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Subject: [Bug middle-end/82333] [8 Regression] powerpc64le _Float128 ICE in as_a, at machmode.h:345
Date: Mon, 27 Nov 2017 19:50:00 -0000
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Michael Meissner <meissner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #6 from Michael Meissner <meissner at gcc dot gnu.org> ---
Fixed in subversion id 255177.
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Subject: [Bug tree-optimization/83055] [8 Regression] ICE in operator>, at profile-count.h:834
Date: Mon, 27 Nov 2017 19:56:00 -0000
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Sunil Pandey <skpgkp1 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |skpgkp1 at gmail dot com
--- Comment #1 from Sunil Pandey <skpgkp1 at gmail dot com> ---
This bug also appear during Linux kernel build from LFS with GCC 8. Work fine
with GCC 7.
$cat main.i.c
void __attribute__((__cold__)) a(void);
void b(void);
__attribute__((noinline)) c(void) { a(); }
d(void) {
b();
c();
}
$gcc --version
gcc (GCC) 8.0.0 20171127 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$gcc -Os -fprofile-arcs -c -o main.i.c.o main.i.c -w
during IPA pass: profile
main.i.c:7:1: internal compiler error: in operator>, at profile-count.h:834
}
^
0x66a5a5 profile_count::operator>(long) const
../../gcc-main.3O1J/gcc/profile-count.h:834
0x66a5a5 handle_missing_profiles()
../../gcc-main.3O1J/gcc/predict.c:3289
0xdc63fd tree_profiling
../../gcc-main.3O1J/gcc/tree-profile.c:750
0xdc63fd execute
../../gcc-main.3O1J/gcc/tree-profile.c:780
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-583277-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 20:02:53 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/45975] template keyword is not allowed, however, accepted by g++
Date: Mon, 27 Nov 2017 20:02:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
CC| |msebor at gcc dot gnu.org
Known to fail| |4.5.4, 4.8.3, 4.9.3, 5.3.0,
| |6.2.0, 7.1.0, 8.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The invalid code is still accepted by GCC 8.0/
>From gcc-bugs-return-583278-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 20:06:18 2017
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Subject: [Bug c/83172] -Wstack-size= doesn't detect the correct stack size with VLA or alloca
Date: Mon, 27 Nov 2017 20:06:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> The same result:
>
> $ gcc-7 -Wvla-larger-than=128 -Wstack-usage=102400 -O0 -c t.c
> t.c: In function ‘stack_usage_only’:
> t.c:23:5: warning: stack usage might be unbounded [-Wstack-usage=]
> int stack_usage_only(unsigned x)
> ^~~~~~~~~~~~~~~~
> t.c: In function ‘alloca_fails_even_with_const’:
> t.c:32:5: warning: stack usage might be unbounded [-Wstack-usage=]
> int alloca_fails_even_with_const()
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> -O1 results the same.
Try -Wvla-larger-than=100 though.
In any case, note that for:
int vla_size_only(unsigned x)
{
if(x > 128) __builtin_unreachable();
char buf[x];
do_something(buf);
return 0;
}
the warning is expected since the code may allocate more than 128 bytes.
-Wstack-usage is designed to be *conservatively* correct and to yield the same
result at all optimization levels, i.e. it will never say that the stack usage
is bounded if there is a path where it may not be. So it's very different from
-Wvla-larger-than or -Walloca-larger-than which say nothing at -O0 or -O1 and
are not conservatively correct.
>From gcc-bugs-return-583279-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 20:10:46 2017
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Subject: [Bug c++/70834] Incorrect warning for placement new when conditionally used
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |6.4.0, 7.2.0, 8.0
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
No change in 8.0.
>From gcc-bugs-return-583280-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 20:23:19 2017
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Subject: [Bug c++/80916] Spurious "declared 'static' but never defined" warning
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-27
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |7.2.0, 8.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with GCC 8.0.
>From gcc-bugs-return-583281-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 20:26:21 2017
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Subject: [Bug rtl-optimization/80818] LRA clobbers live hard reg clobbered during rematerialization
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--- Comment #9 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Andreas Krebbel from comment #8)
> Hi Vladimir. What do you think about the additional patch?
Andreas, sorry for the delay with the answer. The patch looks reasonable for
me. If your additional patch works for you we could try to incorporate it into
my patch. I'll do it and test the new patch and, if everything is ok, I'll
commit it tomorrow or on Wednesday.
>From gcc-bugs-return-583283-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 20:38:40 2017
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Subject: [Bug c++/83187] New: [8 regression] internal compiler error: in get_alias_set, at alias.c:923
Date: Mon, 27 Nov 2017 20:38:00 -0000
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Bug ID: 83187
Summary: [8 regression] internal compiler error: in
get_alias_set, at alias.c:923
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
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Target Milestone: ---
This issue appear in GCC 8. GCC 7 works fine. Following are steps to reproduce.
$cat OFDM.i.cpp
extern "C" {
double cos(double);
double sin(double);
}
template <typename> class a;
template <> struct a<double> {
typedef __complex__ b;
a(double c, double p2) : k{c, p2} {}
b k;
};
typedef double d;
d e;
class f {
a<d> g;
void h();
};
void f::h() {
const d i = e;
g = a<d>(cos(e), sin(e));
}
$g++ --version
g++ (GCC) 8.0.0 20171127 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$g++ -O1 -c -o OFDM.i.cpp.o OFDM.i.cpp
during RTL pass: expand
OFDM.i.cpp: In member function ‘void f::h()’:
OFDM.i.cpp:19:5: internal compiler error: in get_alias_set, at alias.c:923
g = a<d>(cos(e), sin(e));
~~^~~~~~~~~~~~~~~~~~~~~~
0x6653a7 get_alias_set(tree_node*)
../../gcc-main.3O1J/gcc/alias.c:923
0xb2dc4e component_uses_parent_alias_set_from(tree_node const*)
../../gcc-main.3O1J/gcc/alias.c:657
0xc38693 set_mem_attributes_minus_bitpos(rtx_def*, tree_node*, int, long)
../../gcc-main.3O1J/gcc/emit-rtl.c:1920
0xc7185d expand_assignment(tree_node*, tree_node*, bool)
../../gcc-main.3O1J/gcc/expr.c:5181
0xb6a2f8 expand_gimple_stmt_1
../../gcc-main.3O1J/gcc/cfgexpand.c:3675
0xb6a2f8 expand_gimple_stmt
../../gcc-main.3O1J/gcc/cfgexpand.c:3773
0xb6b637 expand_gimple_basic_block
../../gcc-main.3O1J/gcc/cfgexpand.c:5772
0xb704c6 execute
../../gcc-main.3O1J/gcc/cfgexpand.c:6373
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
### GCC 7 works fine.
$g++ --version
g++ (GCC) 7.2.1 20171127
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$g++ -O1 -c -o OFDM.i.cpp.o OFDM.i.cpp
$echo $?
0
>From gcc-bugs-return-583282-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 20:38:28 2017
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Subject: [Bug c++/69638] array out of bounds access accepted in constexpr function invocation
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Known to work| |7.2.0, 8.0
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=77830
Resolution|--- |FIXED
Known to fail|6.0 |6.2.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Bisection shows this bug was fixed in r243873 (GCC 7.0.0) committed to fix
pr77830.
>From gcc-bugs-return-583284-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 20:43:24 2017
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Subject: [Bug c/83180] MINGW: Linking to libpq.dll produced with MSVC-x64 generates invalid code
Date: Mon, 27 Nov 2017 20:43:00 -0000
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Lars Kanis <lars@greiz-reinsdorf.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |MOVED
--- Comment #3 from Lars Kanis <lars@greiz-reinsdorf.de> ---
Thank you Andrew! I posted this issue on
https://sourceware.org/bugzilla/show_bug.cgi?id=22504
>From gcc-bugs-return-583285-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 20:54:14 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83179] [8 regression] gcc.dg/ipa/inline-1.c fail
Date: Mon, 27 Nov 2017 20:54:00 -0000
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--- Comment #6 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Simple. Those fails are due to the same revision.
I decided not to create a truckload of separate bugs (there`s also a chance
that there are more cases to come, as 3 CPU2006 regressions are still not done
being bisected) because everything being in one place lowers the chance that
Honza accidentally misses one while fixing the others.
Is my logic flawed?
>From gcc-bugs-return-583286-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 20:55:53 2017
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From: "hao.hou at utah dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83172] -Wstack-size= doesn't detect the correct stack size with VLA or alloca
Date: Mon, 27 Nov 2017 20:55:00 -0000
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--- Comment #4 from Hao Hou <hao.hou at utah dot edu> ---
(In reply to Eric Botcazou from comment #3)
> > The same result:
> >
> > $ gcc-7 -Wvla-larger-than=128 -Wstack-usage=102400 -O0 -c t.c
> > t.c: In function ‘stack_usage_only’:
> > t.c:23:5: warning: stack usage might be unbounded [-Wstack-usage=]
> > int stack_usage_only(unsigned x)
> > ^~~~~~~~~~~~~~~~
> > t.c: In function ‘alloca_fails_even_with_const’:
> > t.c:32:5: warning: stack usage might be unbounded [-Wstack-usage=]
> > int alloca_fails_even_with_const()
> > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >
> > -O1 results the same.
>
> Try -Wvla-larger-than=100 though.
>
> In any case, note that for:
>
> int vla_size_only(unsigned x)
> {
> if(x > 128) __builtin_unreachable();
> char buf[x];
> do_something(buf);
> return 0;
> }
>
> the warning is expected since the code may allocate more than 128 bytes.
>
> -Wstack-usage is designed to be *conservatively* correct and to yield the
> same result at all optimization levels, i.e. it will never say that the
> stack usage is bounded if there is a path where it may not be. So it's very
> different from
> -Wvla-larger-than or -Walloca-larger-than which say nothing at -O0 or -O1
> and are not conservatively correct.
Thanks Eric, that's a good point. I understand that eventhough the behavior of
the code when x > 128 is undefined, but it's up to the compiler if take this
case into consideration.
I tried to modify the code a little bit:
int stack_usage_only(unsigned x)
{
if(x <= 128)
{
if(x > 128) __builtin_unreachable();
char buf[x];
do_something(buf);
}
return 0;
}
The warning is stil there. I totally understand that the compiler infers the
size conservatively. But this case makes -Wstack-size= somehow equivalent to
-Wvla.
My idea on this warning is that it actually make much more sense when the VLA
or alloca has been used in the code, since it preventing VLA or alloca
allocating unbounded size of memory. That is why I was expecting it actually
infers the range of the x, thus it's an useful indicator of using VLA
correctly.
>From gcc-bugs-return-583287-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 21:39:03 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83139] error: null destination pointer [-Werror=format-truncation=] for second call with same destination pointer
Date: Mon, 27 Nov 2017 21:39:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
A reduced test case showing the IL the checker sees is below. Your analysis is
correct. The checker determines that the call to snprintf takes place when the
destination pointer is null and so issues a warning. The call can also be made
when the destination pointer isn't null, so arguably the checker could walk up
the CFG to try to distinguish these two cases and issue a "destination pointer
may be null" kind of a warning to make it clear that the call may but need not
be safe. But I think the warning is useful regardless of how it's phrased so
I'll go ahead and resolve this report as invalid.
$ cat c.c && gcc -O2 -S -Wall -fdump-tree-printf-return-value=/dev/stdout c.c
/ssd/build/gcc-svn/gcc/xgcc -B /ssd/build/gcc-svn/gcc -O2 -S -Wall
-fdump-tree-printf-return-value=/dev/stdout c.c
;; Function get_config_path (get_config_path, funcdef_no=1, decl_uid=1897,
cgraph_uid=1, symbol_order=1)
c.c:13: __builtin_snprintf: objsize = 4294967295, fmtstr = "abc"
Directive 1 at offset 0: "abc", length = 3
Result: 3, 3, 3, 3 (3, 3, 3, 3)
Directive 2 at offset 3: "", length = 1
Substituting 3 for return value.
c.c: In function ‘get_config_path’:
c.c:20:2: warning: null destination pointer [-Wformat-truncation=]
__builtin_snprintf (pbuf, bufsize, "def");
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
c.c:20: __builtin_snprintf: objsize = 4294967295, fmtstr = "def"
Directive 1 at offset 0: "def", length = 3
Result: 3, 3, 3, 3 (3, 3, 3, 3)
Directive 2 at offset 3: "", length = 1
Substituting 3 for return value.
get_config_path (char * default_path, char * pbuf, unsigned int bufsize)
{
long unsigned int _1;
char * _2;
char _10;
char _11;
char _12;
<bb 2> [local count: 1073741825]:
if (default_path_4(D) != 0B)
goto <bb 3>; [70.00%]
else
goto <bb 4>; [30.00%]
<bb 3> [local count: 751619277]:
_10 = *default_path_4(D);
if (_10 != 0)
goto <bb 7>; [34.00%]
else
goto <bb 4>; [66.00%]
<bb 4> [local count: 818191271]:
_1 = (long unsigned int) bufsize_6(D);
__builtin_snprintf (pbuf_7(D), _1, "abc");
if (pbuf_7(D) != 0B)
goto <bb 5>; [70.00%]
else
goto <bb 9>; [30.00%]
<bb 5> [local count: 572733889]:
_11 = *pbuf_7(D);
if (_11 != 0)
goto <bb 6>; [34.00%]
else
goto <bb 8>; [66.00%]
<bb 6> [local count: 560844966]:
<bb 7> [local count: 1073741823]:
# _2 = PHI <0B(9), default_path_4(D)(3), pbuf_7(D)(6), 0B(8)>
return _2;
<bb 8> [local count: 436423223]:
__builtin_snprintf (pbuf_7(D), _1, "def");
_12 = *pbuf_7(D);
if (_12 != 0)
goto <bb 6>; [83.89%]
else
goto <bb 7>; [16.11%]
<bb 9> [local count: 187038523]:
__builtin_snprintf (0B, _1, "def");
goto <bb 7>; [100.00%]
}
>From gcc-bugs-return-583288-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 21:55:03 2017
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Subject: [Bug c++/81888] [7/8 Regression] Structured bindings stopped working
Date: Mon, 27 Nov 2017 21:55:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Nov 27 21:54:25 2017
New Revision: 255180
URL: https://gcc.gnu.org/viewcvs?rev=255180&root=gcc&view=rev
Log:
PR c++/81888
* parser.c (cp_parser_decomposition_declaration): Reject just
BRACE_ENCLOSED_INITIALIZER_P initializers with nelts != 1 rather
than all such CONSTRUCTORs, and only if is_direct_init is true.
* g++.dg/cpp1z/decomp30.C: Add a test for structured binding with
= {} and = { a, a } initializers.
* g++.dg/cpp1z/decomp31.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/decomp31.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp1z/decomp30.C
>From gcc-bugs-return-583289-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 22:04:09 2017
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Subject: [Bug c++/81888] [7 Regression] Structured bindings stopped working
Date: Mon, 27 Nov 2017 22:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8 Regression] Structured |[7 Regression] Structured
|bindings stopped working |bindings stopped working
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-583290-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 22:22:23 2017
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Subject: [Bug other/83182] undefined behavior in generic_wide_int due to missing input validation
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--- Comment #1 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
wi::to_offset does check for an INTEGER_CST, via the tree.h accessor macros.
Are you sure you have a normal --enable-checking=yes build? I get:
cc1: internal compiler error: tree check: expected integer_cst, have
trunc_div_expr in get_len, at tree.h:5315
with the quoted example.
But yeah, I've certainly no objection in principle to extra
gcc_checking_asserts in wide-int.h itself.
>From gcc-bugs-return-583291-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 22:40:15 2017
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Subject: [Bug ada/83188] New: A class-wide type is considered different than itself
Date: Mon, 27 Nov 2017 22:40:00 -0000
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Bug ID: 83188
Summary: A class-wide type is considered different than itself
Product: gcc
Version: 7.2.0
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Created attachment 42734
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42734&action=edit
a valid program which does not compile
The attached valid program (run `gnatchop script.all`) does not compile.
Weirdly enough, it compiles if I add `subtype X is Script_Info'Class;` in the
beginning of Resource.Parser package and replace all occurrences of
Script_Info'Class in resource-parser.ads and resource-parser.adb with `X`.
$ gcc --version
gcc (Debian 7.2.0-16) 7.2.0
$ make
gprbuild -p main.gpr
Compile
[Ada] resource-parser.adb
resource-parser.ads:10:24: not subtype conformant with operation inherited at
line 7
resource-parser.ads:10:24: return type does not match
>From gcc-bugs-return-583292-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 22:42:17 2017
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From: "daniel.santos at pobox dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83117] [8 Regression] FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test for excess errors)
Date: Mon, 27 Nov 2017 22:42:00 -0000
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Daniel Santos <daniel.santos at pobox dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |daniel.santos at pobox dot com
--- Comment #8 from Daniel Santos <daniel.santos at pobox dot com> ---
(In reply to Jakub Jelinek from comment #6)
> The warning is nothing new, GCC has been warning for that for years. What
> my patch did is just better optimization, so the compiler can see the UB.
>
> Try:
> extern long do_test_aligned ();
>
> static long (*const do_test_v1) (long a, ...) = (void *) do_test_aligned;
>
> extern void check_results (long);
>
> int test (long a)
> {
> long ret;
>
> ret = do_test_v1 (a);
> ret += (long (*) (long a, ...)) do_test_aligned;
> check_results (ret);
> }
>
> We've warned about the latter, but not the former, since we weren't able to
> fold a const var to its initializer.
>
> So, either the tests shouldn't use const on these, something like:
> - out << "static __attribute__ ((ms_abi)) long (*const do_test_"
> + out << "static __attribute__ ((ms_abi)) long (*do_test_"
> or they should use const volatile, or -w, or should use proper prototypes.
>
> Daniel needs to decide what to do, it isn't obviously clear what the intent
> is.
Sorry for my slow response. do_test and do_test_aligned are assembly hacks
that verify that the actual test functions do not alter registers that are
volatile for sysv_abi, but non-volatile for ms_abi (the ms to sysv clobbers).
So the intention was to lie to the compiler about how to call the function, but
now your patch got smart and figured out that I was lying. :(
So in this example, the function msabi_00_v1 is the real function that is being
tested:
init_test (msabi_00_v1, "msabi_00_v1", ALIGNMENT_NOT_TESTED,
SHRINK_WRAP_NONE, a);
ret = do_test_v1 (a);
check_results (ret);
More specifically, the assembly proxy stubs:
1. store rdi, rsi, xmm6-15,
2. populates them with random data
3. pops the return address and stores it
4. calls the function specified in the init_test call prior
upon return it:
5. stores the new values of rdi, rsi xmm6-15 (for later comparison)
6. restores them to what they were originally
7. jumps to the original return address
The test program is a single-threaded and there is no recursion of of these
hacked calls, so I'm just using globals.
Is there a way to disable this warning with -Wno-xxx? Otherwise, what is the
proper way to lie to a compiler? I want the compiler to construct the function
call since that is part of what is being tested.
>From gcc-bugs-return-583293-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 23:01:59 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/83163] bootstrap comparison failure with --enable-languages=all,jit
Date: Mon, 27 Nov 2017 23:01:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |WORKSFORME
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
I've tried various permutations of --enable-languages= arguments but I'm not
able to reproduce the failure anymore, not even with all,jit. It must have
been a some fluke or pilot error. Resolving as WorksForSome.
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Subject: [Bug ipa/83179] [8 regression] gcc.dg/ipa/inline-1.c fail
Date: Mon, 27 Nov 2017 23:15:00 -0000
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--- Comment #7 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to Andrey Guskov from comment #6)
> Simple. Those fails are due to the same revision.
I see, I have missed the very first line in your bug description and
then wondered whether that was the case. The vectorizer issue looks
different but of course it makes sense to keep these together until we
know otherwise.
>From gcc-bugs-return-583295-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 27 23:26:59 2017
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From: "skpgkp1 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83189] New: [8 regression] internal compiler error: in probability_in, at profile-count.h:1050
Date: Mon, 27 Nov 2017 23:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83189
Bug ID: 83189
Summary: [8 regression] internal compiler error: in
probability_in, at profile-count.h:1050
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
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This issue appear in GCC 8 espresso build. GCC 7 works fine. Following are
steps to reproduce.
$cat radin_mod.f90
Module radin_mod
INTEGER, PARAMETER :: DP = selected_real_kind(14,200)
Contains
Subroutine SPLIFT (X,Y,YP,YPP,N,IERR,ISX,A1,B1,AN,BN)
Integer, Intent(in) :: N,ISX
Real(dp), Intent(in) :: X(N),Y(N),A1,B1,AN,BN
Real(dp), Intent(out) :: YP(N),YPP(N)
Real(dp), Allocatable, Dimension(:,:) :: W
NM1 = N-1
NM2 = N-2
If (ISX.Gt.0) GO TO 40
Do I=2,N
If (X(I)-X(I-1) .Le. 0) Then
IERR = 3
Return
Endif
End Do
Allocate(W(N,3))
40 YPP(1) = 4*B1
DOLD = (Y(2)-Y(1))/W(2,2)
Do I=2,NM2
DNEW = (Y(I+1) - Y(I))/W(I+1,2)
YPP(I) = 6*(DNEW - DOLD)
YP(I) = DOLD
DOLD = DNEW
End Do
Return
End Subroutine SPLIFT
End Module radin_mod
$gfortran --version
GNU Fortran (GCC) 8.0.0 20171127 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$gfortran -O3 -x f95-cpp-input -c radin_mod.f90
during GIMPLE pass: pcom
radin_mod.f90:4:0:
Subroutine SPLIFT (X,Y,YP,YPP,N,IERR,ISX,A1,B1,AN,BN)
internal compiler error: in probability_in, at profile-count.h:1050
0x6ed972 profile_count::probability_in(profile_count) const
../../gcc-main.3O1J/gcc/profile-count.h:1050
0x6ed972 tree_transform_and_unroll_loop(loop*, unsigned int, edge_def*,
tree_niter_desc*, void (*)(loop*, void*), void*)
../../gcc-main.3O1J/gcc/tree-ssa-loop-manip.c:1382
0xe16b26 tree_predictive_commoning_loop
../../gcc-main.3O1J/gcc/tree-predcom.c:3274
0xe182b0 tree_predictive_commoning()
../../gcc-main.3O1J/gcc/tree-predcom.c:3308
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
### Work fine with GCC 7
$gfortran --version
GNU Fortran (GCC) 7.2.1 20171127
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$gfortran -O3 -x f95-cpp-input -c radin_mod.f90
$echo $?
0
>From gcc-bugs-return-583296-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 00:02:53 2017
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Subject: [Bug c++/83058] [6/7/8 Regression] ICE on C++ code with negative array index: in warn_placement_new_too_small, at cp/init.c:2666
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Nov 28 00:02:17 2017
New Revision: 255182
URL: https://gcc.gnu.org/viewcvs?rev=255182&root=gcc&view=rev
Log:
PR c++/83058 - ICE on C++ code with negative array index: in
warn_placement_new_too_small
gcc/cp/ChangeLog:
PR c++/83058
* init.c (warn_placement_new_too_small): Use offset_int instead of
HOST_WIDE_INT.
gcc/testsuite/ChangeLog:
PR c++/83058
* g++.dg/warn/Wplacement-new-size-5.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/warn/Wplacement-new-size-5.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/init.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/83058] [6/7/8 Regression] ICE on C++ code with negative array index: in warn_placement_new_too_small, at cp/init.c:2666
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r255182.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83190] New: missing strlen optimization of the empty string
Date: Tue, 28 Nov 2017 00:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83190
Bug ID: 83190
Summary: missing strlen optimization of the empty string
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
The tree-ssa-strlen pass keeps track of the lengths of strings as they are
created, including by initialization of local arrays. As a result, it is able
to determine that the result of the strlen() call in function f() below is 0
and perform this substitution. But the pass misses that the same is true in
function g(), and so it unnecessarily emits a call to strlen() there. It
should be possible to enhance the pass to handle this case as well and perform
the same transformation in both cases.
$ cat a.c && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout a.c
int f (void)
{
char a[] = "012\0";
return __builtin_strlen (a + 3); // folded into 0
}
int g (void)
{
char a[] = "012\0";
return __builtin_strlen (a + 4); // not folded
}
;; Function f (f, funcdef_no=0, decl_uid=1892, cgraph_uid=0, symbol_order=0)
f ()
{
<bb 2> [local count: 1073741825]:
return 0;
}
;; Function g (g, funcdef_no=1, decl_uid=1896, cgraph_uid=1, symbol_order=1)
g ()
{
char a[5];
long unsigned int _1;
int _4;
<bb 2> [local count: 1073741825]:
a = "012";
_1 = __builtin_strlen (&MEM[(void *)&a + 4B]);
_4 = (int) _1;
a ={v} {CLOBBER};
return _4;
}
>From gcc-bugs-return-583299-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 00:44:00 2017
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Subject: [Bug tree-optimization/83190] missing strlen optimization of the empty string
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Clang emits optimal code for both functions.
>From gcc-bugs-return-583300-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 01:09:24 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83190] missing strlen optimization of the empty string
Date: Tue, 28 Nov 2017 01:09:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Isn't the sizeof a, 4?
If so the call to strlen in g is undefined.
>From gcc-bugs-return-583301-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 01:29:34 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81288] [6/7/8 Regression] ICE on 32-bit BE powerpc targets -w -misel -O2 (-O3, -Ofast, -Os)
Date: Tue, 28 Nov 2017 01:29:00 -0000
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Tue Nov 28 01:28:57 2017
New Revision: 255188
URL: https://gcc.gnu.org/viewcvs?rev=255188&root=gcc&view=rev
Log:
rs6000: Improve comparison rtx_cost (PR81288)
The current rs6000 rtx_cost for comparisons against 0 is very high if
TARGET_ISEL && !TARGET_MFCRF, much higher than for reg-reg comparisons,
much higher than a load of 0 and such a reg-reg-comparison. This leads
to infinite recursion in CSE (see PR81288).
This patch removes the too-high cost, also simplifying this code.
PR 81288/target
* config/rs6000/rs6000.c (rs6000_rtx_costs): Do not handle
TARGET_ISEL && !TARGET_MFCRF differently. Simplify code.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
>From gcc-bugs-return-583302-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 02:39:20 2017
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Subject: [Bug fortran/83191] New: Writing a namelist with repeated complex numbers
Date: Tue, 28 Nov 2017 02:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83191
Bug ID: 83191
Summary: Writing a namelist with repeated complex numbers
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
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Priority: P3
Component: fortran
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This is a program that generates the bug on my Mac OS 10.12.6 and 10.13.1 with
the latest MacPorts port gcc7:
program test
implicit none
integer, parameter :: UNIT = 1
character(len=8), parameter :: FILE = "namelist"
complex, dimension(3) :: a = (/ (0.0, 0.0), (0.0, 0.0), (0.0, 0.0) /)
namelist /complex_namelist/ a
open(UNIT, file=FILE)
write(UNIT, nml=complex_namelist)
close(UNIT)
open(UNIT, file=FILE)
read(UNIT, nml=complex_namelist)
close(UNIT)
end program test
It compiles without any warning, but when run, it fails at reading the newly
created namelist:
$ gfortran test.f90 -o test -Wall -Wextra
$ ./test
At line 17 of file test.f90 (unit = 1, file = 'namelist')
Fortran runtime error: Cannot match namelist object name (0.000000000.00000000)
Error termination. Backtrace:
#0 0x10320d0dc
#1 0x10320d99c
#2 0x10320dfff
#3 0x10329b03a
#4 0x1032a0b78
#5 0x1032a0d9f
#6 0x103203df8
#7 0x103203e6c
$
The problem is in the content of the namelist file:
$ cat namelist
&COMPLEX_NAMELIST
A= 3* (0.00000000,0.00000000),
/
$
where the repeated count (3*) has a gap of blanks to the complex number that
needs to be repeated.
If I have a namelist file without that gap, it can be read in by a program
correctly.
In summary, the reading and writing of a namelist file with a repeated count is
not mutually valid.
>From gcc-bugs-return-583303-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 03:50:51 2017
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Subject: [Bug fortran/83192] New: ICE for printing derived type
Date: Tue, 28 Nov 2017 03:50:00 -0000
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Bug ID: 83192
Summary: ICE for printing derived type
Product: gcc
Version: unknown
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Priority: P3
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For GNU Fortran (GCC) 8.0.0 20170430 (experimental) on Windows 10, compiling
the code
module xyz_mod
implicit none
type, public :: bar
integer :: i
end type bar
contains
!
subroutine efg()
character (len=100) :: fmt_
type(bar) :: foo
foo = bar(1)
fmt_ = "(i0)"
write (*,fmt_) foo
end subroutine efg
end module xyz_mod
gives output
c:\fortran\2015>gfortran -c date_series_stats_bug.f90
f951.exe: internal compiler error: Segmentation fault
libbacktrace could not find executable to open
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/83193] New: Help for invalid -march= options from cc1 omits -march=native on x86-64, arm. aarch64, output also inconsistent
Date: Tue, 28 Nov 2017 04:11:00 -0000
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Bug ID: 83193
Summary: Help for invalid -march= options from cc1 omits
-march=native on x86-64, arm. aarch64, output also
inconsistent
Product: gcc
Version: 8.0
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-march=native no longer documented in cc1 help message and the help output is
buggy and inconsistent (missing on aarch64, given twice on arm)
ON X86-64
---------
The cc1 help message when invalid -march= values are passed omits "native" as
an option on x86-64. This is happening on at least 8.0 snapshots and 7.2
branch.
/usr/local/gcc/bin/gcc -march=fdsfks -E - < /dev/null
# 1 "<stdin>"
cc1: error: bad value (‘fdsfks’) for ‘-march=’ switch
cc1: note: valid arguments to ‘-march=’ switch are: nocona core2 nehalem corei7
westmere sandybridge corei7-avx ivybridge core-avx-i haswell core-avx2
broadwell skylake skylake-avx512 cannonlake bonnell atom silvermont slm knl knm
x86-64 eden-x2 nano nano-1000 nano-2000 nano-3000 nano-x2 eden-x4 nano-x4 k8
k8-sse3 opteron opteron-sse3 athlon64 athlon64-sse3 athlon-fx amdfam10
barcelona bdver1 bdver2 bdver3 bdver4 znver1 btver1 btver2
/usr/local/gcc/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-8.0.0/libexec/gcc/x86_64-unknown-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-8.0.0/configure --prefix=/usr/local/gcc-8.0.0
--program-suffix= --disable-werror --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-initfini-array --enable-gnu-indirect-function --with-isl
--enable-languages=c,c++,fortran,lto --disable-libgcj --enable-lto
--enable-multilib --with-tune=generic --with-arch_32=i686
--host=x86_64-unknown-linux-gnu --build=x86_64-unknown-linux-gnu
--disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171126 (experimental) (GCC)
ON ARM
------
On arm native it was included in the list as of 7.x, now it is also missing,
AND THE INFO IS DISPLAYED TWICE:
/usr/local/gcc/bin/gcc -march=fdsfks -E - < /dev/null
gcc: error: unrecognized -march target: fdsfks
gcc: note: valid arguments are: armv2 armv2a armv3 armv3m armv4 armv4t armv5
armv5t armv5e armv5te armv5tej armv6 armv6j armv6k armv6z armv6kz armv6zk
armv6t2 armv6-m armv6s-m armv7 armv7-a armv7ve armv7-r armv7-m armv7e-m armv8-a
armv8.1-a armv8.2-a armv8.3-a armv8-m.base armv8-m.main armv8-r iwmmxt iwmmxt2
gcc: error: unrecognized -march target: fdsfks
gcc: note: valid arguments are: armv2 armv2a armv3 armv3m armv4 armv4t armv5
armv5t armv5e armv5te armv5tej armv6 armv6j armv6k armv6z armv6kz armv6zk
armv6t2 armv6-m armv6s-m armv7 armv7-a armv7ve armv7-r armv7-m armv7e-m armv8-a
armv8.1-a armv8.2-a armv8.3-a armv8-m.base armv8-m.main armv8-r iwmmxt iwmmxt2
gcc: error: missing argument to ‘-march=’
/usr/local/gcc/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-8.0.0/libexec/gcc/armv7l-unknown-linux-gnueabihf/8.0.0/lto-wrapper
Target: armv7l-unknown-linux-gnueabihf
Configured with: ../gcc-8.0.0/configure --prefix=/usr/local/gcc-8.0.0
--program-suffix= --disable-werror --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-gnu-indirect-function --enable-lto --with-isl
--enable-languages=c,c++,fortran,lto --disable-libgcj --enable-clocale=gnu
--disable-libstdcxx-pch --enable-install-libiberty --disable-multilib
--disable-libssp --enable-default-pie --enable-default-ssp
--host=armv7l-unknown-linux-gnueabihf --build=armv7l-unknown-linux-gnueabihf
--with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171126 (experimental) (GCC)
ON AARCH64
----------
On aarch64 no help is given:
/usr/local/gcc/bin/gcc -march=fdsfks -E - < /dev/null
# 1 "<stdin>"
cc1: error: unknown value ‘fdsfks’ for -march
/usr/local/gcc/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-8.0.0/libexec/gcc/aarch64-unknown-linux-gnu/8.0.0/lto-wrapper
Target: aarch64-unknown-linux-gnu
Configured with: ../gcc-8.0.0/configure --prefix=/usr/local/gcc-8.0.0
--program-suffix= --disable-werror --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-gnu-indirect-function --enable-lto --with-isl
--enable-languages=c,c++,fortran,lto --disable-libgcj --enable-clocale=gnu
--disable-libstdcxx-pch --enable-install-libiberty --disable-multilib
--enable-shared --with-arch-directory=aarch64 --enable-multiarch
--disable-libssp --enable-default-pie --enable-default-ssp
--host=aarch64-unknown-linux-gnu --build=aarch64-unknown-linux-gnu
--with-arch=armv8-a --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171126 (experimental) (GCC)
>From gcc-bugs-return-583305-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 04:32:03 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83190] missing strlen optimization of the empty string
Date: Tue, 28 Nov 2017 04:32:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
sizeof "012\0" is 5. There are two NULs at the end, one explicit in the
initializer string and one implicitly appended by the compiler.
That the size is 5 can also be seen in the dump of g():
g ()
{
char a[5];
...
}
>From gcc-bugs-return-583306-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 04:48:41 2017
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Subject: [Bug driver/83193] Help for invalid -march= options from cc1 omits -march=native on x86-64, arm. aarch64, output also inconsistent
Date: Tue, 28 Nov 2017 04:48:00 -0000
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--- Comment #1 from Andrew Roberts <andrewm.roberts at sky dot com> ---
The same comments also apply to the -mcpu and -mtune options as well. Double
output on arm for -mcpu, and missing help for native.
also:
gcc -Q --help=target
used to document the allowable -mcpu/-mtune options, but now only documents the
allowable -mfpu/-mfpmath= options (across ARM, AARCH64 and X86-64). This was
really helpful.
And on aarch64 the -Q --help-target option doesn't properly display -march,
-mcpu -mtune, it displays -march=ARCH, -mcpu=CPU, -mtune=CPU, rather than
-march=, -mcpu=, -mtune= as other systems do.
AARCH64
/usr/local/gcc/bin/gcc -Q --help=target
The following options are target specific:
...
-march=ARCH armv8-a
...
-mcpu=CPU
...
-mtune=CPU
ARM
/usr/local/gcc/bin/gcc -Q --help=target
The following options are target specific:
...
-march= armv7-a+fp
...
-mcpu=
...
-mtune=
X86-64
/usr/local/gcc/bin/gcc -Q --help=target
The following options are target specific:
...
-march= x86-64
...
-mcpu=
...
-mtune= generic
Sorry to be so pedantic.
>From gcc-bugs-return-583307-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 05:25:37 2017
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From: "prathamesh3492 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83142] Missed tail-call opportunity
Date: Tue, 28 Nov 2017 05:24:00 -0000
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prathamesh3492 at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |prathamesh3492 at gcc dot gnu.org
--- Comment #1 from prathamesh3492 at gcc dot gnu.org ---
Hi,
I had submitted a patch for a similar case involving __builtin_memcpy:
https://gcc.gnu.org/ml/gcc-patches/2016-11/msg02485.html
IIUC, there was following issue:
Marking it as tailcall at GIMPLE won't necessarily make it a tail-call during
RTL tail-call emission. To address this issue, the patch created artificial lhs
and returned that instead for the tail-call to be in more "natural" form:
_memcpy(dest, src, n)
return dest
to
_1 = memcpy(dest, src, n)
return _1
And I think later it was concluded that this was better handled in FRE/PRE, for
which you had posted a patch:
https://gcc.gnu.org/ml/gcc-patches/2016-12/msg00424.html
Thanks,
Prathamesh
>From gcc-bugs-return-583308-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 05:38:18 2017
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From: "prathamesh3492 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83194] New: Possibly missed simplification with strcmp(s, t) == strcmp(t, s)
Date: Tue, 28 Nov 2017 05:38:00 -0000
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Bug ID: 83194
Summary: Possibly missed simplification with strcmp(s, t) ==
strcmp(t, s)
Product: gcc
Version: 8.0
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Hi,
FRE transforms
_1 = strcmp(s, t)
_2 = strcmp(s, t)
return _1 == _2
to:
return 1
However it does't transform if
_2 = strcmp(t, s)
I assume strcmp(s, t) == -strcmp(t, s) ?
Would it be safe to transform to following ?
_1 = strcmp (s, t)
_2 = -_1
return _1 == _2
Thanks,
Prathamesh
>From gcc-bugs-return-583309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 06:19:01 2017
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From: "rainer@emrich-ebersheim.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/81470] [8 Regression] Bootstrap comparison failures in gcc/ada
Date: Tue, 28 Nov 2017 06:19:00 -0000
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--- Comment #8 from Rainer Emrich <rainer@emrich-ebersheim.de> ---
(In reply to Eric Botcazou from comment #7)
> And what's the output of 'gcc -v' for the base compiler?
Same gcc without ada:
$
/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-8.0.0/bin/gcc
-v
Using built-in specs.
COLLECT_GCC=D:\opt\devel\gnu\gcc\MINGW_NT\x86_64-w64-mingw32\mingw-w64-runtime-trunk-svn\gcc-8.0.0\bin\gcc.exe
COLLECT_LTO_WRAPPER=d:/opt/devel/gnu/gcc/mingw_nt/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-8.0.0/bin/../libexec/gcc/x86_64-w64-mingw32/8.0.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with:
../../../../../../opt/devel/gnu/src/gcc-mingw-w64/gcc-8.0.0/configure
--prefix=/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-8.0.0
--with-gnu-as
--with-as=/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-8.0.0/bin/as
--with-gnu-ld
--with-ld=/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-8.0.0/bin/ld
--build=x86_64-w64-mingw32 --enable-threads=posix --enable-languages=c,c++,lto
--with-gmp-include=/opt/devel/SCRATCH/tmp.EwWpLRvKY3/install/include
--with-gmp-lib=/opt/devel/SCRATCH/tmp.EwWpLRvKY3/install/lib64
--with-mpfr-include=/opt/devel/SCRATCH/tmp.EwWpLRvKY3/install/include
--with-mpfr-lib=/opt/devel/SCRATCH/tmp.EwWpLRvKY3/install/lib64
--with-mpc-include=/opt/devel/SCRATCH/tmp.EwWpLRvKY3/install/include
--with-mpc-lib=/opt/devel/SCRATCH/tmp.EwWpLRvKY3/install/lib64
--with-isl-include=/opt/devel/SCRATCH/tmp.EwWpLRvKY3/install/include
--with-isl-lib=/opt/devel/SCRATCH/tmp.EwWpLRvKY3/install/lib64
--with-local-prefix=/opt/devel/tec/devel/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-8.0.0
--enable-libgomp --enable-fully-dynamic-string --disable-multilib
--enable-checking=release --disable-werror --with-sysroot=/x86_64-w64-trunk
Thread model: posix
gcc version 8.0.0 20171127 (experimental) [trunk revision 255161] (GCC)
The bootstrap compiler is:
$
/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-7.2.0/bin/gcc
-v
Using built-in specs.
COLLECT_GCC=D:\opt\devel\gnu\gcc\MINGW_NT\x86_64-w64-mingw32\mingw-w64-runtime-trunk-svn\gcc-7.2.0\bin\gcc.exe
COLLECT_LTO_WRAPPER=d:/opt/devel/gnu/gcc/mingw_nt/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-7.2.0/bin/../libexec/gcc/x86_64-w64-mingw32/7.2.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with:
../../../../../../opt/devel/gnu/src/gcc-mingw-w64/gcc-7.2.0/configure
--prefix=/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-7.2.0
--with-gnu-as
--with-as=/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-7.2.0/bin/as
--with-gnu-ld
--with-ld=/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-7.2.0/bin/ld
--build=x86_64-w64-mingw32 --enable-threads=posix
--enable-languages=c,ada,c++,fortran,lto,objc,obj-c++
--with-gmp-include=/opt/devel/SCRATCH/tmp.mrT4RMFK5P/install/include
--with-gmp-lib=/opt/devel/SCRATCH/tmp.mrT4RMFK5P/install/lib64
--with-mpfr-include=/opt/devel/SCRATCH/tmp.mrT4RMFK5P/install/include
--with-mpfr-lib=/opt/devel/SCRATCH/tmp.mrT4RMFK5P/install/lib64
--with-mpc-include=/opt/devel/SCRATCH/tmp.mrT4RMFK5P/install/include
--with-mpc-lib=/opt/devel/SCRATCH/tmp.mrT4RMFK5P/install/lib64
--with-isl-include=/opt/devel/SCRATCH/tmp.mrT4RMFK5P/install/include
--with-isl-lib=/opt/devel/SCRATCH/tmp.mrT4RMFK5P/install/lib64
--with-local-prefix=/opt/devel/tec/devel/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-7.2.0
--enable-libgomp --enable-fully-dynamic-string --disable-multilib
--enable-checking=release --disable-werror --with-sysroot=/x86_64-w64-trunk
Thread model: posix
gcc version 7.2.0 (GCC)
>From gcc-bugs-return-583310-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 07:35:10 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Tue, 28 Nov 2017 07:35:00 -0000
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--- Comment #18 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Ok trying an entirely different algorith, same results:
Using Mersenne Twister algorithm from here:
http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/emt19937ar.html
alter main program to comment out original test harness, and replace
main with:
int main(void)
{
int i;
unsigned long init[4]={0x123, 0x234, 0x345, 0x456}, length=4;
init_by_array(init, length);
clock_t e, s=clock();
int j=genrand_int32();
for(i=0; i<100000000; i++)
{
j ^= genrand_int32();
}
e=clock();
if (j != -549769613) printf("Error j != -549769613 (%d)\n", j);
printf("mt19937ar took %ld clocks ", (long)(e-s));
return 0;
}
So nothing complicated.
On Ryzen:
--------
Top 5:
mt19937ar took 354877 clocks -march=amdfam10 -mtune=k8
mt19937ar took 356203 clocks -march=bdver2 -mtune=eden-x2
mt19937ar took 356534 clocks -march=nano-x2 -mtune=nano-1000
mt19937ar took 357321 clocks -march=athlon-fx -mtune=nano-x4
mt19937ar took 357634 clocks -march=bdver3 -mtune=nano-x2
Bot 5:
mt19937ar took 675052 clocks -march=nano -mtune=btver1
mt19937ar took 679826 clocks -march=k8 -mtune=nocona
mt19937ar took 681118 clocks -march=opteron -mtune=atom
mt19937ar took 689604 clocks -march=core2 -mtune=broadwell
mt19937ar took 699840 clocks -march=skylake -mtune=generic
Top -mtune=znver1
mt19937ar took 369722 clocks -march=nano-x2 -mtune=znver1
Top -march=znver1
mt19937ar took 375286 clocks -march=znver1 -mtune=silvermont
-march=znver1 -mtune=znver1 (aka native)
mt19937ar took 430875 clocks -march=znver1 -mtune=znver1
-march=haswell -mtune=haswell
mt19937ar took 402963 clocks -march=haswell -mtune=haswell
-march=k8 -mtune=k8
mt19937ar took 367890 clocks -march=k8 -mtune=k8
so -march=znver1 -mtune=znver1 is:
7% slower than tuning for haswell
17% slower than tuning for k8
Again -mtune=znver1, -mtune=bdverX, -mtune=btverX all cluster at the bottom
On Haswell:
----------
Top 5:
mt19937ar took 290000 clocks -march=amdfam10 -mtune=barcelona
mt19937ar took 290000 clocks -march=amdfam10 -mtune=bdver1
mt19937ar took 290000 clocks -march=amdfam10 -mtune=bdver2
mt19937ar took 290000 clocks -march=amdfam10 -mtune=bdver3
mt19937ar took 290000 clocks -march=amdfam10 -mtune=bdver4
Bot 5:
mt19937ar took 370000 clocks -march=znver1 -mtune=bdver3
mt19937ar took 370000 clocks -march=znver1 -mtune=bdver4
mt19937ar took 370000 clocks -march=znver1 -mtune=btver2
mt19937ar took 370000 clocks -march=znver1 -mtune=znver1
mt19937ar took 380000 clocks -march=knl -mtune=bdver1
Top -mtune=haswell
mt19937ar took 300000 clocks -march=bdver4 -mtune=haswell
Top -march=haswell
mt19937ar took 300000 clocks -march=haswell -mtune=broadwell
-march=haswell -mtune=haswell (aka native)
mt19937ar took 300000 clocks -march=haswell -mtune=haswell
Best performing pair:
mt19937ar took 290000 clocks -march=barcelona -mtune=barcelona
so the haswell options are pretty much optimal on that hardware
as from other test.
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Tue, 28 Nov 2017 07:40:00 -0000
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--- Comment #19 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 42735
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42735&action=edit
modified mt19937ar test program, test script and results
modified mt19937ar test program, test script and results
tar -tf mt19937ar-test.tar.gz
./doit.csh <= Test script, change path to gcc!
./mt19937ar.c <= main function altered to give test results
./mt19937ar-haswell.txt <= full results on Intel Core i5-4570S
./mt19937ar-ryzen.txt <= full results on AMD Ryzen 7 1700 Eight-Core
Processor
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Tue, 28 Nov 2017 07:45:00 -0000
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--- Comment #20 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Again those latest mt19937ar results above were with the current snapshot:
/usr/local/gcc/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-8.0.0/libexec/gcc/x86_64-unknown-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-8.0.0/configure --prefix=/usr/local/gcc-8.0.0
--program-suffix= --disable-werror --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-initfini-array --enable-gnu-indirect-function --with-isl
--enable-languages=c,c++,fortran,lto --disable-libgcj --enable-lto
--enable-multilib --with-tune=generic --with-arch_32=i686
--host=x86_64-unknown-linux-gnu --build=x86_64-unknown-linux-gnu
--disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171126 (experimental) (GCC)
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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--- Comment #21 from Jan Hubicka <hubicka at ucw dot cz> ---
Hi,
this is comparing SPEC2000 -Ofast -march=native -mprefer-vector-width=128
to -Ofast -march=native -mprefer-vector-width=256 on Ryzen.
168.wupwise 1600 28.2 5669 * 1600 30.8 5187 *
171.swim 3100 26.4 11763 * 3100 27.5 11261 *
172.mgrid 1800 26.1 6907 * 1800 30.9 5827 *
173.applu 2100 25.5 8234 * 2100 25.7 8161 *
177.mesa 1400 23.4 5971 * 1400 23.2 6030 *
178.galgel X X
179.art 2600 10.9 23752 * 2600 10.9 23777 *
183.equake 1300 12.9 10047 * 1300 12.9 10063 *
187.facerec 1900 17.2 11025 * 1900 24.0 7921 *
188.ammp 2200 34.2 6431 * 2200 34.4 6397 *
189.lucas 2000 20.3 9859 * 2000 20.4 9807 *
191.fma3d 2100 29.7 7061 * 2100 31.4 6694 *
200.sixtrack 1100 38.8 2834 * 1100 41.5 2648 *
301.apsi 2600 33.0 7873 * 2600 33.1 7856 *
Est. SPECfp_base2000 8049
Est. SPECfp2000 7590
164.gzip 1400 57.1 2450 * 1400 58.0 2413 *
175.vpr 1400 37.4 3746 * 1400 37.5 3733 *
176.gcc 1100 20.2 5450 * 1100 20.0 5489 *
181.mcf 1800 21.7 8310 * 1800 21.4 8402 *
186.crafty 1000 20.5 4874 * 1000 20.9 4794 *
197.parser 1800 51.7 3481 * 1800 51.5 3498 *
252.eon 1300 18.2 7154 * 1300 19.2 6759 *
253.perlbmk X X
254.gap X X
255.vortex X X
256.bzip2 1500 42.6 3522 * 1500 42.9 3496 *
300.twolf 3000 56.5 5313 * 3000 56.3 5330 *
Est. SPECint_base2000 4612
Est. SPECint2000 4575
So it does not seem to be win in general. I will compare with -mtune=haswell
now
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Subject: [Bug target/83158] [8 regression] gcc.target/i386/pr78057.c fail
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Nov 28 08:15:03 2017
New Revision: 255190
URL: https://gcc.gnu.org/viewcvs?rev=255190&root=gcc&view=rev
Log:
2017-11-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/83158
* tree-vrp.c (intersect_ranges): Prefer ~[0, 0] in a few more
cases.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-vrp.c
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Subject: [Bug target/83158] [8 regression] gcc.target/i386/pr78057.c fail
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/80788] [8 Regression] ICE in set_value_range, at tree-vrp.c:252
Date: Tue, 28 Nov 2017 08:41:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 28 08:40:36 2017
New Revision: 255191
URL: https://gcc.gnu.org/viewcvs?rev=255191&root=gcc&view=rev
Log:
PR tree-optimization/80788
* match.pd (X +- C1 CMP C2 -> X CMP C2 -+ C1): If res
has TREE_OVERFLOW set, call drop_tree_overflow.
* gcc.dg/pr80788.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr80788.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
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From: "rdapp at linux dot vnet.ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
Date: Tue, 28 Nov 2017 09:10:00 -0000
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rdapp at linux dot vnet.ibm.com changed:
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----------------------------------------------------------------------------
CC| |rdapp at linux dot vnet.ibm.com
--- Comment #11 from rdapp at linux dot vnet.ibm.com ---
416.gamess fails on S390 as well since r254888.
I didn't immediately get what the
if (freq_max < 16)
freq_max = 16;
part of the patch is supposed to achieve. When freq_max < 16, tmp will later be
larger than BLOCK_INFO (bb)->frequency which wasn't the case before. In the
worst case we approach max_count by 4 bits every time.
Why do we need a minimum freq_max? To ensure some scaling even for low
frequencies?
>From gcc-bugs-return-583318-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 09:22:14 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83192] ICE for printing derived type
Date: Tue, 28 Nov 2017 09:22:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-28
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
WORKSFORME on x86_64-apple-darwin17 for the revisions I have tested.
>From gcc-bugs-return-583319-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 09:31:51 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83142] Missed tail-call opportunity
Date: Tue, 28 Nov 2017 09:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83142
--- Comment #2 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 28 Nov 2017, prathamesh3492 at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83142
>
> prathamesh3492 at gcc dot gnu.org changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |prathamesh3492 at gcc dot gnu.org
>
> --- Comment #1 from prathamesh3492 at gcc dot gnu.org ---
> Hi,
> I had submitted a patch for a similar case involving __builtin_memcpy:
> https://gcc.gnu.org/ml/gcc-patches/2016-11/msg02485.html
>
> IIUC, there was following issue:
> Marking it as tailcall at GIMPLE won't necessarily make it a tail-call during
> RTL tail-call emission. To address this issue, the patch created artificial lhs
> and returned that instead for the tail-call to be in more "natural" form:
>
> _memcpy(dest, src, n)
> return dest
> to
> _1 = memcpy(dest, src, n)
> return _1
>
> And I think later it was concluded that this was better handled in FRE/PRE, for
> which you had posted a patch:
> https://gcc.gnu.org/ml/gcc-patches/2016-12/msg00424.html
Yeah, that didn't work out so I implemented the reverse now, postponed
for GCC 9 because of this and other fallout. So we should revisit
your original patch and adjust it to re-instantiate a LHS on the
call & propagate to dominating uses.
>From gcc-bugs-return-583321-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 09:54:27 2017
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Subject: [Bug c++/83186] [8 regression] internal compiler error: in build_address, at cp/typeck.c:5667
Date: Tue, 28 Nov 2017 09:54:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug middle-end/83185] [8 Regression] ICE with -fsanitizedress in build_simple_mem_ref_loc, at tree.c:4696
Date: Tue, 28 Nov 2017 09:54:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-28
Known to work| |7.2.1
Target Milestone|--- |8.0
Summary|ICE with -fsanitize=address |[8 Regression] ICE with
|in |-fsanitize=address in
|build_simple_mem_ref_loc, |build_simple_mem_ref_loc,
|at tree.c:4696 |at tree.c:4696
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-583322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 09:54:56 2017
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Subject: [Bug c++/83187] [8 regression] internal compiler error: in get_alias_set, at alias.c:923
Date: Tue, 28 Nov 2017 09:54:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/83189] [8 regression] internal compiler error: in probability_in, at profile-count.h:1050
Date: Tue, 28 Nov 2017 09:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|fortran |tree-optimization
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>From gcc-bugs-return-583324-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 09:58:05 2017
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Subject: [Bug tree-optimization/83194] Possibly missed simplification with strcmp(s, t) == strcmp(t, s)
Date: Tue, 28 Nov 2017 09:58:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
CC| |jsm28 at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Joseph, can functions like strcmp be treated as having "commutative" arguments?
Or do we need to preserve implementation behavior which as I read the standard
are not required to adhere to strcmp (s, t) == -strcmp (t, s)?
>From gcc-bugs-return-583325-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 09:59:39 2017
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Subject: [Bug tree-optimization/83190] missing strlen optimization of the empty string
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83190
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-28
Ever confirmed|0 |1
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Probably some off-by-one error.
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
Date: Tue, 28 Nov 2017 10:04:00 -0000
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--- Comment #12 from Siddhesh Poyarekar <siddhesh at gotplt dot org> ---
(In reply to rdapp from comment #11)
> 416.gamess fails on S390 as well since r254888.
>
> I didn't immediately get what the
>
> if (freq_max < 16)
> freq_max = 16;
>
> part of the patch is supposed to achieve. When freq_max < 16, tmp will later
> be larger than BLOCK_INFO (bb)->frequency which wasn't the case before. In
> the worst case we approach max_count by 4 bits every time.
> Why do we need a minimum freq_max? To ensure some scaling even for low
> frequencies?
I suppose the minimum frequency is to prevent loss of precision in the lower
frequencies (they may get rounded off to 0 in the profile counts since they're
integers) when the max_freq is greater than max_real_bb_freq. It is consistent
with earlier behaviour and the higher max_real_bb_freq should give us a net win
anyway.
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
Date: Tue, 28 Nov 2017 10:05:00 -0000
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--- Comment #13 from Siddhesh Poyarekar <siddhesh at gotplt dot org> ---
(In reply to David Binderman from comment #7)
> Maybe some more extensive testing of your patch would increase
> the chances of it being accepted.
make check just finished on aarch64 and saw no failures due to this patch.
make check on aarch64 is almost on its last legs and shows now new failures
either.
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Subject: [Bug target/80881] [7/8 Regression] null pointer access in libgomp.h
Date: Tue, 28 Nov 2017 10:15:00 -0000
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--- Comment #6 from jyong at gcc dot gnu.org ---
Crash seems to be coming from the mingw-w64 runtime tls handler.
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Subject: [Bug rtl-optimization/81020] [6/7/8 Regression] wrong code with -O -fno-tree-bit-ccp -fno-tree-coalesce-vars -fno-tree-vrp
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 28 10:22:31 2017
New Revision: 255193
URL: https://gcc.gnu.org/viewcvs?rev=255193&root=gcc&view=rev
Log:
PR rtl-optimization/81020
* gcc.dg/pr81020.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr81020.c
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/81020] [6/7 Regression] wrong code with -O -fno-tree-bit-ccp -fno-tree-coalesce-vars -fno-tree-vrp
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7/8 Regression] wrong |[6/7 Regression] wrong code
|code with -O |with -O -fno-tree-bit-ccp
|-fno-tree-bit-ccp |-fno-tree-coalesce-vars
|-fno-tree-coalesce-vars |-fno-tree-vrp
|-fno-tree-vrp |
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk with r254875.
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Subject: [Bug c++/83187] [8 regression] internal compiler error: in get_alias_set, at alias.c:923
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-28
CC| |jakub at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r247546.
>From gcc-bugs-return-583332-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 10:47:53 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83191] [7/8 Regression] Writing a namelist with repeated complex numbers
Date: Tue, 28 Nov 2017 10:47:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |6.4.0
Keywords| |wrong-code
Last reconfirmed| |2017-11-28
CC| |jvdelisle at gcc dot gnu.org
Ever confirmed|0 |1
Summary|Writing a namelist with |[7/8 Regression] Writing a
|repeated complex numbers |namelist with repeated
| |complex numbers
Target Milestone|--- |7.3
Known to fail| |7.2.0, 8.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Likely caused by r237735 (pr48852).
The test in pr48852 comment 0 prints now
(1.00000000,0.00000000)
It should probably be
(1.00000000,0.00000000)
If I read the code correctly, it is caused by the lines
lblanks = width - res_len1 - res_len2 - 3;
write_x (dtp, lblanks, lblanks);
needed to have right justified outputs (case C in pr48852 comment 12).
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Subject: [Bug tree-optimization/83189] [8 regression] internal compiler error: in probability_in, at profile-count.h:1050
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed with revision r255159.
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Subject: [Bug c/83117] [8 Regression] FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test for excess errors)
Date: Tue, 28 Nov 2017 11:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83117
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 28 11:14:52 2017
New Revision: 255196
URL: https://gcc.gnu.org/viewcvs?rev=255196&root=gcc&view=rev
Log:
PR c/83117
* gcc.target/x86_64/abi/ms-sysv/gen.cc (make_do_tests_decl): Drop
const from do_test_{u,v}*.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/x86_64/abi/ms-sysv/gen.cc
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Subject: [Bug tree-optimization/80788] [8 Regression] ICE in set_value_range, at tree-vrp.c:252
Date: Tue, 28 Nov 2017 11:23:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c/83117] [8 Regression] FAIL: gcc.target/x86_64/abi/ms-sysv/ms-sysv.c (test for excess errors)
Date: Tue, 28 Nov 2017 11:23:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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From: "sudi.das at arm dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug regression/83195] New: [8 regression] pr82929.c scan for "Merging successful" fail
Date: Tue, 28 Nov 2017 11:28:00 -0000
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Bug ID: 83195
Summary: [8 regression] pr82929.c scan for "Merging successful"
fail
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
Component: regression
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Reporter: sudi.das at arm dot com
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The test case pr82929.c that got in recently with the store merging patches has
started to fail on native arm-none-linux-gnueabihf and cross bare metals of
arm-none-eabi
FAIL: gcc.dg/pr82929.c scan-tree-dump-times store-merging "Merging successful"
1 (found 0 times)
This has been there since at least r255140.
Thanks
Sudi
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Subject: [Bug c++/83187] [8 regression] internal compiler error: in get_alias_set, at alias.c:923
Date: Tue, 28 Nov 2017 11:37:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The problem is that we have a type (complex double) where
TYPE_CANONICAL (TYPE_MAIN_VARIANT (t)) != TYPE_MAIN_VARIANT (TYPE_CANONICAL
(TYPE_MAIN_VARIANT (t)))
which get_alias_set code asserts on, because it does:
t = TYPE_MAIN_VARIANT (t);
...
if (TYPE_STRUCTURAL_EQUALITY_P (t))
...
else
t = TYPE_CANONICAL (t);
gcc_checking_assert (t == TYPE_MAIN_VARIANT (t));
Nathan, can you please have a look?
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Subject: [Bug c++/83186] [8 regression] internal compiler error: in build_address, at cp/typeck.c:5667
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-28
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r253266.
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Subject: [Bug c++/83187] [8 regression] internal compiler error: in get_alias_set, at alias.c:923
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/83141] SRA and memcpy folding interact badly generating wrong-code
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
folding part fixed - leaving SRA part to Martin.
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Subject: [Bug tree-optimization/83141] SRA and memcpy folding interact badly generating wrong-code
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Nov 28 11:58:45 2017
New Revision: 255197
URL: https://gcc.gnu.org/viewcvs?rev=255197&root=gcc&view=rev
Log:
2017-11-28 Richard Biener <rguenther@suse.de>
PR middle-end/83141
* gimple-fold.c (gimple_fold_builtin_memory_op): For aggregate
copies generated from memcpy use a character array as reference
type.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-fold.c
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Subject: [Bug tree-optimization/83195] [8 regression] pr82929.c scan for "Merging successful" fail
Date: Tue, 28 Nov 2017 12:07:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |arm
Component|regression |tree-optimization
Target Milestone|--- |8.0
>From gcc-bugs-return-583344-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 12:17:21 2017
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/81020] [6/7 Regression] wrong code with -O -fno-tree-bit-ccp -fno-tree-coalesce-vars -fno-tree-vrp
Date: Tue, 28 Nov 2017 12:17:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Was that really a fix though, or did it just fix this particular testcase?
r254875 isn't a bug fix /per se/; it makes combine not miss some combinations
it can do that it would miss without the patch. This then apparently makes
it not try the "bad" combination.
>From gcc-bugs-return-583345-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 12:18:03 2017
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83191] [7/8 Regression] Writing a namelist with repeated complex numbers
Date: Tue, 28 Nov 2017 12:18:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jvdelisle at gcc dot gnu.org
--- Comment #2 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
My bad. I will look into it.
>From gcc-bugs-return-583346-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 12:21:55 2017
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Subject: [Bug middle-end/83185] [8 Regression] ICE with -fsanitizedress in build_simple_mem_ref_loc, at tree.c:4696
Date: Tue, 28 Nov 2017 12:21:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, the ICE is because without -fsanitize=address we have:
struct [0:D.1901][1] * aps.0;
struct [1] * _7;
aps.0_10 = __builtin_alloca_with_align (_8, 64);
_7 = &*aps.0_10[4];
__builtin_va_start (_7, 0);
but with -fsanitize=address
struct [1] * _7;
struct [0:D.2257][1] * _17;
struct [0:D.2257][1] * _18;
_17 = __builtin_alloca_with_align (_16, 256);
_18 = _17 + 32;
__builtin___asan_alloca_poison (_18, _8);
_7 = &MEM[(struct [0:D.2257][1] *)_17 + 32B][4];
__builtin_va_start (_7, 0);
Now, tree-cfg.c verification is happy about this, in both
&*aps.0_10[4]
as well as
&MEM[(struct [0:D.2257][1] *)_17 + 32B][4]
but when the backend feeds that to build_simple_mem_ref_loc we reach:
4687 /* For convenience allow addresses that collapse to a simple base
4688 and offset. */
4689 if (TREE_CODE (ptr) == ADDR_EXPR
4690 && (handled_component_p (TREE_OPERAND (ptr, 0))
4691 || TREE_CODE (TREE_OPERAND (ptr, 0)) == MEM_REF))
4692 {
4693 ptr = get_addr_base_and_unit_offset (TREE_OPERAND (ptr, 0),
&offset);
4694 gcc_assert (ptr);
4695 ptr = build_fold_addr_expr (ptr);
4696 gcc_assert (is_gimple_reg (ptr) || is_gimple_min_invariant
(ptr));
4697 }
which ICEs in the -fsanitize=address case, in the former case ptr after
build_fold_addr_expr is a SSA_NAME, but in the latter &MEM_REF[SSA_NAME + 32],
and because the base is SSA_NAME, not ADDR_EXPR, we don't really merge the two
offsets together.
So, is this a forwprop bug + checking bug that it created such ADDR_EXPR -
in cddce3 we still had:
_17 = __builtin_alloca_with_align (_16, 256);
_18 = _17 + 32;
__builtin___asan_alloca_poison (_18, _8);
_7 = &*_18[4];
__builtin_va_start (_7, 0);
and then forwprop4 turns that into:
_17 = __builtin_alloca_with_align (_16, 256);
_18 = _17 + 32;
__builtin___asan_alloca_poison (_18, _8);
_7 = &MEM[(struct [0:D.2257][1] *)_17 + 32B][4];
__builtin_va_start (_7, 0);
Or should build_simple_mem_ref_loc deal also with this case (such as seeing
that if ptr fails the above assert, but is ADDR_EXPR of a MEM_REF with SSA_NAME
base and constant, use the ptr base as the constant and add the offset to
offset)? Or should all the backends and other spots that call
build_simple_mem_ref_loc gimplify the address instead?
>From gcc-bugs-return-583347-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 12:56:52 2017
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Subject: [Bug rtl-optimization/81020] [6/7 Regression] wrong code with -O -fno-tree-bit-ccp -fno-tree-coalesce-vars -fno-tree-vrp
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |aoliva at gcc dot gnu.org
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Dunno. In any case, reverting your r254875 on current trunk makes the testcase
FAIL again, and applying
http://gcc.gnu.org/ml/gcc-patches/2017-06/msg01656.html
on top of that fixes it again.
>From gcc-bugs-return-583348-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 13:04:19 2017
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Subject: [Bug debug/81307] [8 regression] g++.dg/debug/debug9.C -gstabs FAILs
Date: Tue, 28 Nov 2017 13:04:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 28 13:03:37 2017
New Revision: 255198
URL: https://gcc.gnu.org/viewcvs?rev=255198&root=gcc&view=rev
Log:
PR debug/81307
* dbxout.c (dbx_block_with_cold_children): Fix function comment.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dbxout.c
>From gcc-bugs-return-583349-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 13:22:40 2017
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Subject: [Bug tree-optimization/83194] Possibly missed simplification with strcmp(s, t) == strcmp(t, s)
Date: Tue, 28 Nov 2017 13:22:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
What if strcmp returns INT_MIN?
>From gcc-bugs-return-583350-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 13:25:18 2017
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Subject: [Bug target/80819] [6/7/8 regression] Useless store to the stack in _mm_set_epi64x with SSE4 -mno-avx
Date: Tue, 28 Nov 2017 13:25:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Honza, thoughts on this? Given:
movq %rdi, -16(%rsp)
movq -16(%rsp), %xmm0
pinsrq $1, %rsi, %xmm0
I'd say if pinsrq $1, %rsi, %xmm0 is not too slow on recent AMD, then either
movq %rdi, %xmm0 should be also not too slow, or pinsrq $0, %rdi, %xmm0 should
be the way to go.
Note current trunk still emits a dead store with -mtune=intel -O2 -msse4:
movq %rsi, -16(%rsp)
movq %rdi, %xmm0
pinsrq $1, %rsi, %xmm0
and with -mtune=generic -O2 -msse4:
movq %rdi, -16(%rsp)
movq %rsi, -24(%rsp)
movq -16(%rsp), %xmm0
pinsrq $1, %rsi, %xmm0
Wonder why doesn't DSE eliminate it.
>From gcc-bugs-return-583351-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 13:31:49 2017
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Subject: [Bug rtl-optimization/80709] [8 Regression] ICE in setup_preferred_alternate_classes_for_new_pseudos, at ira.c:2772
Date: Tue, 28 Nov 2017 13:31:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Can't reproduce this, neither with r248000 nor current trunk:
./cc1plus.248000 -quiet -nostdinc -O2 -mcpu=arm7tdmi -mfloat-abi=soft -marm
pr80709.C
pr80709.C: In function ‘void abort()’:
pr80709.C:12:28: warning: ‘int __builtin_memcmp_eq(const void*, const void*,
unsigned int)’ reading 16 bytes from a region of size 4 [-Wstringop-overflow=]
if (__builtin_memcmp (&e, &f, sizeof (a)))
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-583352-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 13:32:14 2017
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Subject: [Bug middle-end/70773] Cortex A5 profiled sudoku solver slower due to lack of sdiv/udiv
Date: Tue, 28 Nov 2017 13:32:00 -0000
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--- Comment #23 from PeteVine <tulipawn at gmail dot com> ---
$ gcov-dump-6 sudoku.gcda.bad
sudoku.gcda.bad:data:magic `gcda':version `603*'
sudoku.gcda.bad:stamp 46515746
sudoku.gcda.bad: a3000000: 77:PROGRAM_SUMMARY checksum=0x12ec1c02
sudoku.gcda.bad: counts=29, runs=1, sum_all=342403001,
run_max=58689000, sum_max=58689000
sudoku.gcda.bad: counter histogram:
sudoku.gcda.bad: 0: num counts=2, min counter=0, cum_counter=0
sudoku.gcda.bad: 1: num counts=1, min counter=1, cum_counter=1
sudoku.gcda.bad: 35: num counts=6, min counter=1000,
cum_counter=6000
sudoku.gcda.bad: 41: num counts=1, min counter=3000,
cum_counter=3000
sudoku.gcda.bad: 48: num counts=3, min counter=9000,
cum_counter=27000
sudoku.gcda.bad: 54: num counts=1, min counter=27000,
cum_counter=27000
sudoku.gcda.bad: 55: num counts=1, min counter=29000,
cum_counter=29000
sudoku.gcda.bad: 60: num counts=3, min counter=81000,
cum_counter=243000
sudoku.gcda.bad: 82: num counts=1, min counter=3531000,
cum_counter=3531000
sudoku.gcda.bad: 86: num counts=4, min counter=6469000,
cum_counter=26033000
sudoku.gcda.bad: 92: num counts=1, min counter=19563000,
cum_counter=19563000
sudoku.gcda.bad: 98: num counts=5, min counter=58411000,
cum_counter=292941000
sudoku.gcda.bad: 01000000: 3:FUNCTION ident=108032747,
lineno_checksum=0x0ceca33f, cfg_checksum=0x73ff2042
sudoku.gcda.bad: 01a10000: 6:COUNTERS arcs 3 counts
sudoku.gcda.bad: 01b10000: 2:COUNTERS time_profiler 1 counts
sudoku.gcda.bad: 01000000: 3:FUNCTION ident=82881,
lineno_checksum=0x3ae31d81, cfg_checksum=0x707619b8
sudoku.gcda.bad: 01a10000: 14:COUNTERS arcs 7 counts
sudoku.gcda.bad: 01b10000: 2:COUNTERS time_profiler 1 counts
sudoku.gcda.bad: 01000000: 3:FUNCTION ident=1633341470,
lineno_checksum=0xf25ea178, cfg_checksum=0x88a084d7
sudoku.gcda.bad: 01a10000: 22:COUNTERS arcs 11 counts
sudoku.gcda.bad: 01b10000: 2:COUNTERS time_profiler 1 counts
sudoku.gcda.bad: 01000000: 3:FUNCTION ident=535938890,
lineno_checksum=0x375a9f34, cfg_checksum=0x5d41b59e
sudoku.gcda.bad: 01a10000: 16:COUNTERS arcs 8 counts
sudoku.gcda.bad: 01b10000: 2:COUNTERS time_profiler 1 counts
whereas:
$ gcov-dump-8 sudoku.gcda.good
sudoku.gcda.good:data:magic `gcda':version `A80e'
sudoku.gcda.good:stamp 46451024
sudoku.gcda.good:tag `00000052' is invalid
sudoku.gcda.good: 00000052:459670006:UNKNOWN
so it looks like the profile data is not usable and hence no pessimization?
That's probably not the fix I was hoping for, oops!
>From gcc-bugs-return-583353-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 13:39:09 2017
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Subject: [Bug middle-end/70773] Cortex A5 profiled sudoku solver slower due to lack of sdiv/udiv
Date: Tue, 28 Nov 2017 13:39:00 -0000
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--- Comment #24 from PeteVine <tulipawn at gmail dot com> ---
Or maybe not, gcov-dump-6 is able to read the file.
$ gcov-dump-6 sudoku.gcda.good
sudoku.gcda.good:data:magic `gcda':version `A80e'
sudoku.gcda.good:warning:current version is `603*'
sudoku.gcda.good:stamp 46451024
sudoku.gcda.good: a3000000: 82:PROGRAM_SUMMARY checksum=0x1b6601f6
sudoku.gcda.good: counts=29, runs=1, sum_all=283905002,
run_max=58689000, sum_max=58689000
sudoku.gcda.good: counter histogram:
sudoku.gcda.good: 0: num counts=2, min counter=0, cum_counter=0
sudoku.gcda.good: 1: num counts=2, min counter=1, cum_counter=2
sudoku.gcda.good: 35: num counts=6, min counter=1000,
cum_counter=6000
sudoku.gcda.good: 41: num counts=2, min counter=3000,
cum_counter=6000
sudoku.gcda.good: 48: num counts=2, min counter=9000,
cum_counter=18000
sudoku.gcda.good: 54: num counts=1, min counter=27000,
cum_counter=27000
sudoku.gcda.good: 55: num counts=1, min counter=29000,
cum_counter=29000
sudoku.gcda.good: 58: num counts=1, min counter=52000,
cum_counter=52000
sudoku.gcda.good: 60: num counts=2, min counter=81000,
cum_counter=162000
sudoku.gcda.good: 82: num counts=1, min counter=3531000,
cum_counter=3531000
sudoku.gcda.good: 86: num counts=4, min counter=6469000,
cum_counter=26033000
sudoku.gcda.good: 92: num counts=1, min counter=19563000,
cum_counter=19563000
sudoku.gcda.good: 98: num counts=4, min counter=58411000,
cum_counter=234478000
sudoku.gcda.good: 01000000: 3:FUNCTION ident=108032747,
lineno_checksum=0x0ceca33f, cfg_checksum=0x73ff2042
sudoku.gcda.good: 01a10000: 6:COUNTERS arcs 3 counts
sudoku.gcda.good: 01af0000: 2:COUNTERS ior 1 counts
sudoku.gcda.good: 01000000: 3:FUNCTION ident=82881,
lineno_checksum=0x3ae31d81, cfg_checksum=0x707619b8
sudoku.gcda.good: 01a10000: 14:COUNTERS arcs 7 counts
sudoku.gcda.good: 01af0000: 2:COUNTERS ior 1 counts
sudoku.gcda.good: 01000000: 3:FUNCTION ident=1633341470,
lineno_checksum=0xf25ea178, cfg_checksum=0x1bd90f34
sudoku.gcda.good: 01a10000: 22:COUNTERS arcs 11 counts
sudoku.gcda.good: 01af0000: 2:COUNTERS ior 1 counts
sudoku.gcda.good: 01000000: 3:FUNCTION ident=535938890,
lineno_checksum=0x375a9f34, cfg_checksum=0x5d41b59e
sudoku.gcda.good: 01a10000: 16:COUNTERS arcs 8 counts
sudoku.gcda.good: 01af0000: 2:COUNTERS ior 1 counts
>From gcc-bugs-return-583354-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 13:51:43 2017
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Subject: [Bug target/80819] [6/7/8 regression] Useless store to the stack in _mm_set_epi64x with SSE4 -mno-avx
Date: Tue, 28 Nov 2017 13:51:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |uros at gcc dot gnu.org,
| |vmakarov at gcc dot gnu.org
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The dead stores are created during LRA, e.g. with -mtune=haswell we get:
(insn 3 5 4 2 (set (mem/c:DI (plus:DI (reg/f:DI 7 sp)
(const_int -16 [0xfffffffffffffff0])) [2 %sfp+-8 S8 A64])
(reg:DI 4 si [ b ])) "pr80819.c":2 85 {*movdi_internal}
(nil))
(note 4 3 17 2 NOTE_INSN_FUNCTION_BEG)
(insn 17 4 19 2 (set (reg:DI 21 xmm0 [91])
(reg/v:DI 5 di [orig:88 a ] [88])) "include/emmintrin.h":591 85
{*movdi_internal}
(nil))
(note 19 17 20 2 NOTE_INSN_DELETED)
(note 20 19 7 2 NOTE_INSN_DELETED)
(insn 7 20 12 2 (set (reg:V2DI 21 xmm0 [91])
(vec_concat:V2DI (reg:DI 21 xmm0 [91])
(mem/c:DI (plus:DI (reg/f:DI 7 sp)
(const_int -16 [0xfffffffffffffff0])) [2 %sfp+-8 S8 A64])))
"include/emmintrin.h":591 3738 {vec_concatv2di}
(nil))
That is weird, because vec_concatv2di has:
(define_insn "vec_concatv2di"
[(set (match_operand:V2DI 0 "register_operand"
"=Yr,*x,x ,v ,Yi,v ,x ,x,v ,x,x,v")
(vec_concat:V2DI
(match_operand:DI 1 "nonimmediate_operand"
" 0, 0,x ,Yv,r ,vm,?!*Yn,0,Yv,0,0,v")
(match_operand:DI 2 "vector_move_operand"
"*rm,rm,rm,rm,C ,C ,C ,x,Yv,x,m,m")))]
constraints, so if it is able to reload the first vec_concat operand into the
destination register, why doesn't it pick the alternative (=Yr,0,*rm) or
(=*x,0,rm)? Is that because of the asterisks?
Shouldn't we help RA and have an alternative with (=Yi,r,r) guarded with x64
isa that would be split into movd + pinsrq?
>From gcc-bugs-return-583355-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 13:56:43 2017
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Subject: [Bug middle-end/70773] Cortex A5 profiled sudoku solver slower due to lack of sdiv/udiv
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--- Comment #25 from PeteVine <tulipawn at gmail dot com> ---
So, the profile data is probably fine, and judging from the size of the final
binary, it's being used. The fix could be real after all :)
>From gcc-bugs-return-583356-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 14:19:22 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Tue, 28 Nov 2017 14:19:00 -0000
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--- Comment #22 from Jan Hubicka <hubicka at ucw dot cz> ---
Hi,
this is same base (so you can see there is some noise) compared to haswell
tuning
164.gzip 1400 57.1 2452 * 1400 58.7 2384 *
175.vpr 1400 37.1 3776 * 1400 38.3 3659 *
176.gcc 1100 20.0 5500 * 1100 20.1 5464 *
181.mcf 1800 21.6 8327 * 1800 20.9 8617 *
186.crafty 1000 20.4 4905 * 1000 21.0 4760 *
197.parser 1800 51.3 3506 * 1800 51.9 3466 *
252.eon 1300 18.2 7162 * 1300 19.2 6781 *
253.perlbmk X X
254.gap X X
255.vortex X X
256.bzip2 1500 42.4 3537 * 1500 44.1 3401 *
300.twolf 3000 56.4 5317 * 3000 56.3 5328 *
Est. SPECint_base2000 4632
Est. SPECint2000 4548
168.wupwise 1600 28.2 5667 * 1600 28.7 5580 *
171.swim 3100 26.3 11807 * 3100 27.4 11304 *
172.mgrid 1800 26.0 6930 * 1800 31.0 5810 *
173.applu 2100 25.5 8239 * 2100 25.6 8193 *
177.mesa 1400 23.4 5970 * 1400 22.9 6116 *
178.galgel X X
179.art 2600 10.9 23807 * 2600 10.4 25014 *
183.equake 1300 12.9 10039 * 1300 12.9 10060 *
187.facerec 1900 17.3 11009 * 1900 20.8 9135 *
188.ammp 2200 34.2 6441 * 2200 34.2 6428 *
189.lucas 2000 20.7 9683 * 2000 20.7 9679 *
191.fma3d 2100 29.7 7060 * 2100 31.5 6660 *
200.sixtrack 1100 38.6 2847 * 1100 40.9 2687 *
301.apsi 2600 33.1 7866 * 2600 32.7 7952 *
Est. SPECfp_base2000 8045
Est. SPECfp2000 7766
So mes, arta and mcf sems to benefit from Haswell tunning.
Mesa is vectorization problem (we vectorize cold loop and introduce too much
of register pressure)
What is however interesting is that zen tuning with 256bit vectorization seems
to be worse than haswell tuning. I will run haswell with 128bit vector size.
What your matrix multiplication benchmark runs into is issue with multiply
and add instruction. Once machine is free I will try it, but disabling fmadd
may solve the regression.
Honza
Honza
>From gcc-bugs-return-583357-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 14:20:50 2017
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Subject: [Bug target/80819] [6/7/8 regression] Useless store to the stack in _mm_set_epi64x with SSE4 -mno-avx
Date: Tue, 28 Nov 2017 14:20:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Note it is already postreload that propagates the %rsi register directly into
vec_concatv2di. And the reason why DSE does nothing is that since LRA
introduction the DSE spill removal has been disabled and last year even removed
altogether.
Removing the * from the first alternative fixes this.
Uros, what is the purpose of those two *s and can't they be replaced by say ^
or $ ?
>From gcc-bugs-return-583358-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 14:24:53 2017
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
Date: Tue, 28 Nov 2017 14:24:00 -0000
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--- Comment #14 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Letting entry block frequency to drop to 0 has bad effect on IPA profile
propagation. Since new profile count arithmetics is overflow safe, I think we
should just cap it to max_count in such case.
The loop as written will never finish anyway so and if the bounds are not known
we should teach branch prediction to work out that it is not a good idea to
estimate very deep loop nests with "large" trip count.
I will prepare patch that silence the assert.
Honza
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Subject: [Bug tree-optimization/80776] -Wformat-overflow false positive for %d on integer bounded by __builtin_unreachable
Date: Tue, 28 Nov 2017 14:58:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Nov 28 14:58:11 2017
New Revision: 255201
URL: https://gcc.gnu.org/viewcvs?rev=255201&root=gcc&view=rev
Log:
2017-11-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/80776
* gimple-ssa-evrp-analyze.h (evrp_range_analyzer::set_ssa_range_info):
Declare.
* gimple-ssa-evrp-analyze.c (evrp_range_analyzer::set_ssa_range_info):
New function.
(evrp_range_analyzer::record_ranges_from_incoming_edges):
If the incoming edge is an effective fallthru because the other
edge only reaches a __builtin_unreachable () then record ranges
derived from the controlling condition in SSA info.
(evrp_range_analyzer::record_ranges_from_phis): Use set_ssa_range_info.
(evrp_range_analyzer::record_ranges_from_stmt): Likewise.
* gcc.dg/pr80776-1.c: New testcase.
* gcc.dg/pr80776-2.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/pr80776-1.c
trunk/gcc/testsuite/gcc.dg/pr80776-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-evrp-analyze.c
trunk/gcc/gimple-ssa-evrp-analyze.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c
trunk/gcc/tree-vrp.h
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Subject: [Bug tree-optimization/80776] -Wformat-overflow false positive for %d on integer bounded by __builtin_unreachable
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
The original case is now fixed.
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Subject: [Bug tree-optimization/83072] Late VRP optimization
Date: Tue, 28 Nov 2017 15:05:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
The testcase is now optimized early during evrp after r255201. We still don't
record temporary ranges in SSA range info but we can perform the unreachable ()
trick VRP has.
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Subject: [Bug fortran/83021] [7/8 Regression] gfortran segfault in polymorphic assignment
Date: Tue, 28 Nov 2017 15:14:00 -0000
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--- Comment #12 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Tue Nov 28 15:13:42 2017
New Revision: 255202
URL: https://gcc.gnu.org/viewcvs?rev=255202&root=gcc&view=rev
Log:
2017-11-28 Paul Thomas <pault@gcc.gnu.org>
PR fortran/83021
* resolve.c (resolve_component): Only escape for use assciated
vtypes if the current namespace has no proc_name and is most
particularly block data.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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--- Comment #23 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Thanks Honza,
getting closer, with original matrix.c on Ryzen:
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -O3 matrix.c -o matrix
mult took 364850 clocks
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -mprefer-vector-width=none
-O3 matrix.c -o matrix
mult took 194517 clocks
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -mprefer-vector-width=none
-mno-fma -O3 matrix.c -o matrix
mult took 130343 clocks
/usr/local/gcc/bin/gcc -march=haswell -mtune=haswell -mprefer-vector-width=none
-mno-fma -O3 matrix.c -o matrix
mult took 130129 clocks
These last two are comparable with the fastest obtained from trying all
combinations of -march and -mtune
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Subject: [Bug lto/69866] lto1: internal compiler error: in add_symbol_to_partition_1, at lto/lto-partition.c:158
Date: Tue, 28 Nov 2017 15:19:00 -0000
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--- Comment #14 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Author: thopre01
Date: Tue Nov 28 15:19:14 2017
New Revision: 255203
URL: https://gcc.gnu.org/viewcvs?rev=255203&root=gcc&view=rev
Log:
Fix ICE in add_symbol_to_partition_1
2017-11-28 Thomas Preud'homme <thomas.preudhomme@arm.com>
Backport from mainline
2017-06-15 Jan Hubicka <hubicka@ucw.cz>
Thomas Preud'homme <thomas.preudhomme@arm.com>
gcc/lto/
PR lto/69866
* lto-symtab.c (lto_symtab_merge_symbols): Drop useless definitions
that resolved externally.
Backport from mainline
2017-06-15 Thomas Preud'homme <thomas.preudhomme@arm.com>
gcc/testsuite/
PR lto/69866
* gcc.dg/lto/pr69866_0.c: New test.
* gcc.dg/lto/pr69866_1.c: Likewise.
Added:
branches/ARM/embedded-7-branch/gcc/lto/ChangeLog.arm
branches/ARM/embedded-7-branch/gcc/testsuite/gcc.dg/lto/pr69866_0.c
branches/ARM/embedded-7-branch/gcc/testsuite/gcc.dg/lto/pr69866_1.c
Modified:
branches/ARM/embedded-7-branch/gcc/lto/lto-partition.c
branches/ARM/embedded-7-branch/gcc/lto/lto-symtab.c
branches/ARM/embedded-7-branch/gcc/testsuite/ChangeLog.arm
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Tue, 28 Nov 2017 15:22:00 -0000
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--- Comment #24 from Andrew Roberts <andrewm.roberts at sky dot com> ---
For the mt19937ar test:
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -O3 mt19937ar.c -o mt19937ar
mt19937ar took 462062 clocks
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -mprefer-vector-width=none
-O3 mt19937ar.c -o mt19937ar
mt19937ar took 412449 clocks
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -mprefer-vector-width=none
-mno-fma -O3 mt19937ar.c -o mt19937ar
mt19937ar took 419284 clocks
/usr/local/gcc/bin/gcc -march=haswell -mtune=haswell -mprefer-vector-width=none
-mno-fma -O3 mt19937ar.c -o mt19937ar
mt19937ar took 436768 clocks
/usr/local/gcc/bin/gcc -march=corei7-avx -mtune=skylake -O3 mt19937ar.c -o
mt19937ar
mt19937ar took 410302 clocks
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Subject: [Bug tree-optimization/83195] [8 regression] pr82929.c scan for "Merging successful" fail
Date: Tue, 28 Nov 2017 15:33:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is because arm is cheating:
proc check_effective_target_non_strict_align {} {
# On ARM, the default is to use STRICT_ALIGNMENT, but there
# are interfaces defined for misaligned access and thus
# depending on the architecture levels unaligned access is
# available.
if [istarget "arm*-*-*"] {
return [check_effective_target_arm_unaligned]
}
return [check_no_compiler_messages non_strict_align assembly {
char *y;
typedef char __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) c;
c *z;
void foo(void) { z = (c *) y; }
} "-Wcast-align"]
}
proc check_effective_target_store_merge { } {
if { [is-effective-target non_strict_align ] && [is-effective-target
int32plus] } {
return 1
}
return 0
}
The testcase really cares about:
bool allow_unaligned_store
= !STRICT_ALIGNMENT && PARAM_VALUE (PARAM_STORE_MERGING_ALLOW_UNALIGNED);
bool allow_unaligned_load = allow_unaligned_store;
If that is not true, then in this case the optimization is not beneficial.
Is this the only store merging testcase that fails on arm?
I'd prefer not to add __builtin_assume_aligned and similar to the testcase so
that it tests the !STRICT_ALIGNMENT behavior (perhaps we can have another one
with that builtin), so do I need to uglify by using { target { store_merge && {
! arm*-*-* } } } ?
>From gcc-bugs-return-583367-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 15:39:34 2017
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Subject: [Bug fortran/83021] [7/8 Regression] gfortran segfault in polymorphic assignment
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--- Comment #13 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Tue Nov 28 15:38:55 2017
New Revision: 255205
URL: https://gcc.gnu.org/viewcvs?rev=255205&root=gcc&view=rev
Log:
2017-11-28 Paul Thomas <pault@gcc.gnu.org>
PR fortran/83021
* resolve.c (resolve_component): Only escape for use assciated
vtypes if the current namespace has no proc_name and is most
particularly block data.
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/resolve.c
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Subject: [Bug fortran/83021] [7/8 Regression] gfortran segfault in polymorphic assignment
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #14 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed! Thanks for the report.
Paul
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Subject: [Bug tree-optimization/83190] missing strlen optimization of the empty string
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The strlen pass doesn't track of all the string lengths though, that would be
prohibitive, at least with the current infrastructure (say char a[1000000] =
{}; just notes that strlen(a) is 0, not that strlen(a + 253) is also 0.
Generally, the entry for such a pointer is only created when such pointer is
constructed, and at that point it is too late to find the length from the
earlier initializer.
>From gcc-bugs-return-583370-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 16:33:46 2017
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Subject: [Bug middle-end/83185] [8 Regression] ICE with -fsanitizedress in build_simple_mem_ref_loc, at tree.c:4696
Date: Tue, 28 Nov 2017 16:33:00 -0000
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42736
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42736&action=edit
gcc8-pr83185.patch
Untested fix.
>From gcc-bugs-return-583371-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 16:37:33 2017
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83194] Possibly missed simplification with strcmp(s, t) == strcmp(t, s)
Date: Tue, 28 Nov 2017 16:37:00 -0000
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--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
You definitely cannot assume strcmp (s, t) == -strcmp (t, s), only that
the result has the correct sign in each case.
There should be no need to preserve the exact return value (of the correct
sign) chosen by the implementation in a particular case.
>From gcc-bugs-return-583372-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 16:38:15 2017
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Subject: [Bug tree-optimization/83195] [8 regression] pr82929.c scan for "Merging successful" fail
Date: Tue, 28 Nov 2017 16:38:00 -0000
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
I agree it's simpler to skip the test on arm, unless we want to go down the
route of testing the movmisalign optab availability, which seems yucky.
>From gcc-bugs-return-583373-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 16:42:50 2017
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Subject: [Bug target/80819] [6/7/8 regression] Useless store to the stack in _mm_set_epi64x with SSE4 -mno-avx
Date: Tue, 28 Nov 2017 16:42:00 -0000
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--- Comment #8 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #7)
> Note it is already postreload that propagates the %rsi register directly
> into vec_concatv2di. And the reason why DSE does nothing is that since LRA
> introduction the DSE spill removal has been disabled and last year even
> removed altogether.
> Removing the * from the first alternative fixes this.
> Uros, what is the purpose of those two *s and can't they be replaced by say
> ^ or $ ?
The (*x,0,rm) alternative was introduced together with Yr to avoid REX
prefixes, but the reason for *rm escaped my mind... probably is there from the
reload times, and could hopefully be removed.
>From gcc-bugs-return-583374-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 16:46:41 2017
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Subject: [Bug rtl-optimization/81025] [8 Regression] gcc ICE while building glibc for MIPS soft-float multi-lib variant
Date: Tue, 28 Nov 2017 16:46:00 -0000
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What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Can't reproduce with current trunk, at least not on the #c4 testcase.
Generally, if delay slots contain frame related instructions it is always a
problem how to express that in the unwind info which doesn't have a concept of
delay slots or something similar.
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Subject: [Bug tree-optimization/83195] [8 regression] pr82929.c scan for "Merging successful" fail
Date: Tue, 28 Nov 2017 16:52:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-28
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42737
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42737&action=edit
gcc8-pr83195.patch
Untested fix.
>From gcc-bugs-return-583376-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 16:58:16 2017
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Subject: [Bug tree-optimization/83195] [8 regression] pr82929.c scan for "Merging successful" fail
Date: Tue, 28 Nov 2017 16:58:00 -0000
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--- Comment #4 from Sudakshina Das <sudi.das at arm dot com> ---
I think this is the only test that fails on arm.
>From gcc-bugs-return-583377-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 17:02:58 2017
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Subject: [Bug target/80819] [6/7/8 regression] Useless store to the stack in _mm_set_epi64x with SSE4 -mno-avx
Date: Tue, 28 Nov 2017 17:02:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ok, I'll bootstrap/regtest removing that; dunno if that is sufficient though,
if there shouldn't be some performance analysis. That said, it is solely about
the SSE4, for AVX we use different alternatives. And, before r218303 there was
no * on the rm.
>From gcc-bugs-return-583378-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 17:03:47 2017
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Subject: [Bug fortran/83196] New: ICE in gfc_build_compare_string, at fortran/trans-expr.c:3609 (and others)
Date: Tue, 28 Nov 2017 17:03:00 -0000
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Bug ID: 83196
Summary: ICE in gfc_build_compare_string, at
fortran/trans-expr.c:3609 (and others)
Product: gcc
Version: 8.0
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This function reference in "s" misses obligatory parentheses :
$ cat z1.f90
program p
call s
contains
subroutine s
if ( f /= 'abc' ) call abort
end
character(3) function f()
f = 'abc'
end
end
$ gfortran-8-20171126 -c z1.f90 -O2
z1.f90:5:0:
if ( f /= 'abc' ) call abort
internal compiler error: Segmentation fault
0xb6848f crash_signal
../../gcc/toplev.c:325
0x7600d6 gfc_build_compare_string(tree_node*, tree_node*, tree_node*,
tree_node*, int, tree_code)
../../gcc/fortran/trans-expr.c:3609
0x76a0ae gfc_conv_expr_op
../../gcc/fortran/trans-expr.c:3385
0x769993 gfc_conv_expr_val(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:7905
0x7989a7 gfc_trans_if_1
../../gcc/fortran/trans-stmt.c:1319
0x79f71a gfc_trans_if(gfc_code*)
../../gcc/fortran/trans-stmt.c:1356
0x734747 trans_code
../../gcc/fortran/trans.c:1916
0x75b42c gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6437
0x75b2a7 gfc_generate_contained_functions
../../gcc/fortran/trans-decl.c:5449
0x75b2a7 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6366
0x6ed280 translate_all_program_units
../../gcc/fortran/parse.c:6092
0x6ed280 gfc_parse_file()
../../gcc/fortran/parse.c:6295
0x731abf gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
Nearby with -O0 :
$ gfortran-8-20171126 -c z1.f90 -O0
z1.f90:5:0:
if ( f /= 'abc' ) call abort
internal compiler error: Segmentation fault
0xb6848f crash_signal
../../gcc/toplev.c:325
0x76000f gfc_build_compare_string(tree_node*, tree_node*, tree_node*,
tree_node*, int, tree_code)
../../gcc/fortran/trans-expr.c:3629
#...
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Subject: [Bug fortran/83196] ICE in gfc_build_compare_string, at fortran/trans-expr.c:3609 (and others)
Date: Tue, 28 Nov 2017 17:04:00 -0000
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
With reversed order, i.e. definition of "f" first :
$ cat z2.f90
program p
call s
contains
character(3) function f()
f = 'abc'
end
subroutine s
if ( f /= 'abc' ) call abort
end
end
$ gfortran-8-20171126 -c z2.f90
z2.f90:8:13:
if ( f /= 'abc' ) call abort
1
Error: Function 'f' requires an argument list at (1)
>From gcc-bugs-return-583380-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 17:05:16 2017
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Subject: [Bug fortran/83196] ICE in gfc_build_compare_string, at fortran/trans-expr.c:3609 (and others)
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--- Comment #2 from G. Steinmetz <gscfq@t-online.de> ---
Slightly modified :
$ cat z3.f90
program p
call s
contains
subroutine s
if ( f /= '' ) call abort
end
character(3) function f()
f = ''
end
end
$ gfortran-8-20171126 -c z3.f90 -O2
z3.f90:5:0:
if ( f /= '' ) call abort
internal compiler error: Segmentation fault
0xb6848f crash_signal
../../gcc/toplev.c:325
0x94ef4d is_gimple_reg_type
../../gcc/gimple-expr.h:75
0x94ef4d gimplify_arg(tree_node**, gimple**, unsigned int, bool)
../../gcc/gimplify.c:3061
0x95a23c gimplify_call_expr
../../gcc/gimplify.c:3309
0x953e10 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11312
0x953a3c gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:12070
0x9598fc gimplify_cond_expr
../../gcc/gimplify.c:3957
0x9543f0 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11297
0x956d26 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6556
0x9545cb gimplify_statement_list
../../gcc/gimplify.c:1736
0x9545cb gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11769
0x956d26 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6556
0x95827f gimplify_bind_expr
../../gcc/gimplify.c:1294
0x954510 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11541
0x956d26 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6556
0x958ac1 gimplify_body(tree_node*, bool)
../../gcc/gimplify.c:12538
0x958ea5 gimplify_function_tree(tree_node*)
../../gcc/gimplify.c:12696
0xbebb22 gimplify_all_functions
../../gcc/tree-nested.c:3318
0xbebb07 gimplify_all_functions
../../gcc/tree-nested.c:3320
0xbefd5f lower_nested_functions(tree_node*)
../../gcc/tree-nested.c:3337
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Subject: [Bug c++/81610] bogus fix-it hint for a call to an undeclared function: for
Date: Tue, 28 Nov 2017 17:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81610
--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch:
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg02048.html
>From gcc-bugs-return-583381-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 17:11:12 2017
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Subject: [Bug c++/80567] bogus fixit hint for undeclared memset: else
Date: Tue, 28 Nov 2017 17:11:00 -0000
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--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch:
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg02048.html
>From gcc-bugs-return-583382-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 17:11:31 2017
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From: "gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83197] New: ICE in strip_float_extensions, at tree.c:11935
Date: Tue, 28 Nov 2017 17:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83197
Bug ID: 83197
Summary: ICE in strip_float_extensions, at tree.c:11935
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gscfq@t-online.de
Target Milestone: ---
Depending on function, at different optimization levels :
$ cat z1.c
double sqrt ();
void f (float a)
{
a = sqrt ();
}
$ cat z2.c
double sin ();
void f (float a)
{
a = sin ();
}
$ gcc-8-20171126 -c z1.c -O0
$ gcc-8-20171126 -c z1.c -O1
z1.c: In function 'f':
z1.c:4:3: internal compiler error: Segmentation fault
a = sqrt ();
^
0xac9f1f crash_signal
../../gcc/toplev.c:325
0xcfa588 strip_float_extensions(tree_node*)
../../gcc/tree.c:11935
0x787b30 convert_to_real_1
../../gcc/convert.c:197
0x682148 convert(tree_node*, tree_node*)
../../gcc/c/c-convert.c:137
0x6b6003 convert_and_check(unsigned int, tree_node*, tree_node*)
../../gcc/c-family/c-common.c:1557
0x66eaf9 convert_for_assignment
../../gcc/c/c-typeck.c:6509
0x67d54c build_modify_expr(unsigned int, tree_node*, tree_node*, tree_code,
unsigned int, tree_node*, tree_node*)
../../gcc/c/c-typeck.c:5956
0x692d16 c_parser_expr_no_commas
../../gcc/c/c-parser.c:6739
0x692eb2 c_parser_expression
../../gcc/c/c-parser.c:9476
0x694729 c_parser_expression_conv
../../gcc/c/c-parser.c:9509
0x6a50ec c_parser_statement_after_labels
../../gcc/c/c-parser.c:5667
0x6a1265 c_parser_compound_statement_nostart
../../gcc/c/c-parser.c:5179
0x6a19aa c_parser_compound_statement
../../gcc/c/c-parser.c:5012
0x6a310e c_parser_declaration_or_fndef
../../gcc/c/c-parser.c:2343
0x6a98f3 c_parser_external_declaration
../../gcc/c/c-parser.c:1656
0x6aa369 c_parser_translation_unit
../../gcc/c/c-parser.c:1536
0x6aa369 c_parse_file()
../../gcc/c/c-parser.c:19041
0x6f15b5 c_common_parse_file()
../../gcc/c-family/c-opts.c:1127
$ gcc-8-20171126 -c z2.c -O2
$ gcc-8-20171126 -c z2.c -O3
$ gcc-8-20171126 -c z2.c -Ofast
z2.c: In function 'f':
z2.c:4:3: internal compiler error: Segmentation fault
#...
>From gcc-bugs-return-583384-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 17:13:43 2017
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Subject: [Bug c/83198] New: ICE internal compiler error: in format_floating, at gimple-ssa-sprintf.c:1900
Date: Tue, 28 Nov 2017 17:13:00 -0000
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Bug ID: 83198
Summary: ICE internal compiler error: in format_floating, at
gimple-ssa-sprintf.c:1900
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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With this snippet :
$ cat z1.c
void f (int x)
{
char d[40];
int a = __builtin_sprintf (d, "%.a", x, 1.0);
int b = __builtin_sprintf (d, "%.*a", x, '1');
int c = __builtin_sprintf (d, "%.*a", 1.0, x);
}
$ gcc-6-20171122 -c z1.c
$ gcc-8-20171126 -c z1.c
during GIMPLE pass: printf-return-value
z1.c: In function 'f':
z1.c:1:6: internal compiler error: in format_floating, at
gimple-ssa-sprintf.c:1900
void f (int x)
^
0x1107ee6 format_floating
../../gcc/gimple-ssa-sprintf.c:1900
0x110507e format_directive
../../gcc/gimple-ssa-sprintf.c:2755
0x110507e compute_format_length
../../gcc/gimple-ssa-sprintf.c:3483
0x110507e handle_gimple_call
../../gcc/gimple-ssa-sprintf.c:3970
0x110507e before_dom_children
../../gcc/gimple-ssa-sprintf.c:4003
0x10d9f57 dom_walker::walk(basic_block_def*)
../../gcc/domwalk.c:308
0x11027cf execute
../../gcc/gimple-ssa-sprintf.c:4023
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Subject: [Bug target/80819] [6/7/8 regression] Useless store to the stack in _mm_set_epi64x with SSE4 -mno-avx
Date: Tue, 28 Nov 2017 17:15:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42738
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42738&action=edit
gcc8-pr80819.patch
Patch I'm going to test.
>From gcc-bugs-return-583386-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 17:16:33 2017
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83197] ICE in strip_float_extensions, at tree.c:11935
Date: Tue, 28 Nov 2017 17:16:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-28
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-583387-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 17:19:58 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/81470] [8 Regression] Bootstrap comparison failures in gcc/ada
Date: Tue, 28 Nov 2017 17:19:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
CC| |hainque at gcc dot gnu.org
--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Correction: we can reproduce.
>From gcc-bugs-return-583388-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 17:24:50 2017
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Subject: [Bug c/83197] ICE in strip_float_extensions, at tree.c:11935
Date: Tue, 28 Nov 2017 17:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83197
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Even r104500 ICEs -> this is ancient.
>From gcc-bugs-return-583389-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 17:26:04 2017
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Subject: [Bug c/83198] ICE internal compiler error: in format_floating, at gimple-ssa-sprintf.c:1900
Date: Tue, 28 Nov 2017 17:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83198
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-28
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |7.2.0, 8.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. A simplified test case is below. As the -Wformat warning suggests,
the sprintf calls are undefined, but the printf-return-value pass isn't
prepared to handle them.
$ cat pr83198.c && gcc -O2 -S -Wall pr83198.c
void f (char *d, int x)
{
__builtin_sprintf (d, "%.a", x);
}
pr83198.c: In function ‘f’:
pr83198.c:3:28: warning: format ‘%a’ expects argument of type ‘double’, but
argument 3 has type ‘int’ [-Wformat=]
__builtin_sprintf (d, "%.a", x);
~~^ ~
%.d
during GIMPLE pass: printf-return-value
pr83198.c:1:6: internal compiler error: in format_floating, at
gimple-ssa-sprintf.c:1900
void f (char *d, int x)
^
0x1b13be5 format_floating
/ssd/src/gcc/git/gcc/gimple-ssa-sprintf.c:1900
0x1b15e5f format_directive
/ssd/src/gcc/git/gcc/gimple-ssa-sprintf.c:2755
0x1b17c9d compute_format_length
/ssd/src/gcc/git/gcc/gimple-ssa-sprintf.c:3483
0x1b18e2b handle_gimple_call
/ssd/src/gcc/git/gcc/gimple-ssa-sprintf.c:3970
0x1b18f78 before_dom_children
/ssd/src/gcc/git/gcc/gimple-ssa-sprintf.c:4003
0x1ac8f59 dom_walker::walk(basic_block_def*)
/ssd/src/gcc/git/gcc/domwalk.c:308
0x1b18feb execute
/ssd/src/gcc/git/gcc/gimple-ssa-sprintf.c:4023
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-583390-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 17:27:11 2017
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Subject: [Bug c/83198] [7/8 regression] ICE internal compiler error: in format_floating, at gimple-ssa-sprintf.c:1900
Date: Tue, 28 Nov 2017 17:27:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Summary|ICE internal compiler |[7/8 regression] ICE
|error: in format_floating, |internal compiler error: in
|at |format_floating, at
|gimple-ssa-sprintf.c:1900 |gimple-ssa-sprintf.c:1900
>From gcc-bugs-return-583391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 17:47:03 2017
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Subject: [Bug fortran/83196] ICE in gfc_build_compare_string, at fortran/trans-expr.c:3609 (and others)
Date: Tue, 28 Nov 2017 17:47:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-28
Ever confirmed|0 |1
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (8.0). My instrumented gfortran gives
../../work/gcc/fortran/trans-expr.c:3627:7: runtime error: member access within
null pointer of type 'union tree_node'
>From gcc-bugs-return-583392-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 18:06:43 2017
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Subject: [Bug debug/83199] New: FAIL: gdb.base/async.exp & gdb.base/skip.exp
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Bug ID: 83199
Summary: FAIL: gdb.base/async.exp & gdb.base/skip.exp
Product: gcc
Version: 8.0
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Keywords: wrong-debug
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CC: jakub at gcc dot gnu.org
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Target: arm-none-eabi
Hi,
The following tests regressed on arm-none-eabi targets after r254010:
PASS->FAIL: gdb.base/async.exp: nexti&
PASS->FAIL: gdb.base/async.exp: finish&
PASS->FAIL: gdb.base/skip.exp: step after disabling 3: step 3
PASS->FAIL: gdb.base/skip.exp: step after disabling 3: step 5
PASS->FAIL: gdb.base/skip.exp: step using -fu for baz: step 3
PASS->FAIL: gdb.base/skip.exp: step using -fu for baz: step 5
PASS->FAIL: gdb.base/skip.exp: step using -rfu for baz: step 3
PASS->FAIL: gdb.base/skip.exp: step using -rfu for baz: step 5
GCC was configured as: --target=arm-none-eabi --with-newlib --with-mode=thumb
--with-cpu=cortex-m3
The 2 async tests fail because the addresses are missing:
-(gdb) 0x00008172 9 x = 5; x = 5; x = 5;
+(gdb) 9 x = 5; x = 5; x = 5;
-Run till exit from #0 0x00008172 in foo ()
+Run till exit from #0 foo ()
The skip tests fail because the wrong line is shown by gdb after doing step.
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Tue, 28 Nov 2017 18:06:00 -0000
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--- Comment #25 from Jan Hubicka <hubicka at ucw dot cz> ---
Hi,
I agree that the matric multiplication fma issue is important and hopefully it
will be fixed for GCC 8. See
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg00437.html
The irregularity of tune/arch is probably originating from enabling/disabling
fma
and avx256 preferrence. I get
jh@d136:~> /home/jh/trunk-install-new3/bin/gcc -Ofast -march=native -mno-fma
mult.c
jh@d136:~> ./a.out
mult took 193593 clocks
jh@d136:~> /home/jh/trunk-install-new3/bin/gcc -Ofast -march=native -mno-fma
-mprefer-vector-width=256 mult.c
jh@d136:~> ./a.out
mult took 104745 clocks
jh@d136:~> /home/jh/trunk-install-new3/bin/gcc -Ofast -march=haswell
-mprefer-vector-width=256 mult.c
jh@d136:~> ./a.out
mult took 160123 clocks
jh@d136:~> /home/jh/trunk-install-new3/bin/gcc -Ofast -march=haswell
-mprefer-vector-width=256 -mno-fma mult.c
jh@d136:~> ./a.out
mult took 102048 clocks
90% difference on a common loop is quite noticeable.
Continuing my benchmarkings on spec2k.
This is -Ofast -march=native -mprefer-vector-width=none compared to
-Ofast -march=native -mtune=haswell -mprefer-vector-width=128.
So neither of those are win compared to -mtune=native.
164.gzip 1400 58.2 2407 * 1400 57.9 2419 *
175.vpr 1400 37.5 3731 * 1400 37.8 3704 *
176.gcc 1100 20.0 5494 * 1100 20.0 5497 *
181.mcf 1800 21.6 8324 * 1800 20.8 8660 *
186.crafty 1000 20.9 4790 * 1000 21.2 4722 *
197.parser 1800 51.4 3499 * 1800 51.8 3472 *
252.eon 1300 19.3 6749 * 1300 18.2 7143 *
253.perlbmk X X
254.gap X X
255.vortex X X
256.bzip2 1500 43.1 3483 * 1500 43.5 3444 *
300.twolf 3000 56.6 5302 * 3000 57.0 5267 *
Est. SPECint_base2000 4563
Est. SPECint2000 4591
168.wupwise 1600 30.9 5179 * 1600 29.7 5387 *
171.swim 3100 27.4 11309 * 3100 26.4 11739 *
172.mgrid 1800 31.0 5814 * 1800 26.1 6895 *
173.applu 2100 25.7 8175 * 2100 25.9 8096 *
177.mesa 1400 23.3 6006 * 1400 23.3 6001 *
178.galgel X X
179.art 2600 11.0 23702 * 2600 11.0 23718 *
183.equake 1300 13.0 10033 * 1300 13.1 9944 *
187.facerec 1900 24.0 7931 * 1900 17.2 11040 *
188.ammp 2200 34.4 6394 * 2200 35.2 6249 *
189.lucas 2000 20.3 9864 * 2000 20.8 9603 *
191.fma3d 2100 31.4 6686 * 2100 30.0 7011 *
200.sixtrack 1100 41.7 2641 * 1100 38.5 2856 *
301.apsi 2600 34.1 7630 * 2600 34.2 7612 *
Est. SPECfp_base2000 7570
Est. SPECfp2000 7947
>From gcc-bugs-return-583394-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 18:14:25 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Tue, 28 Nov 2017 18:14:00 -0000
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--- Comment #26 from Jan Hubicka <hubicka at ucw dot cz> ---
On you matrix benchmarks I get:
Vector inside of loop cost: 44
Vector prologue cost: 12
Vector epilogue cost: 0
Scalar iteration cost: 40
Scalar outside cost: 0
Vector outside cost: 12
prologue iterations: 0
epilogue iterations: 0
Calculated minimum iters for profitability: 1
mult.c:15:7: note: Runtime profitability threshold = 4
mult.c:15:7: note: Static estimate profitability threshold = 4
Vector inside of loop cost: 2428
Vector prologue cost: 4
Vector epilogue cost: 0
Scalar iteration cost: 2428
Scalar outside cost: 0
Vector outside cost: 4
prologue iterations: 0
epilogue iterations: 0
Calculated minimum iters for profitability: 1
mult.c:30:7: note: Runtime profitability threshold = 4
mult.c:30:7: note: Static estimate profitability threshold = 4
for 128bit vectorization and for 256bit
Vector inside of loop cost: 88
Vector prologue cost: 24
Vector epilogue cost: 0
Scalar iteration cost: 40
Scalar outside cost: 0
Vector outside cost: 24
prologue iterations: 0
epilogue iterations: 0
Calculated minimum iters for profitability: 1
mult.c:15:7: note: Runtime profitability threshold = 8
mult.c:15:7: note: Static estimate profitability threshold = 8
Vector inside of loop cost: 6472
Vector prologue cost: 8
Vector epilogue cost: 0
Scalar iteration cost: 2428
Scalar outside cost: 0
Vector outside cost: 8
prologue iterations: 0
epilogue iterations: 0
Calculated minimum iters for profitability: 1
mult.c:30:7: note: Runtime profitability threshold = 8
mult.c:30:7: note: Static estimate profitability threshold = 8
So if vectorizer knew to preffer bigger vector sizes when cost is about double,
it would vectoriye first loop to
256 as expected.
>From gcc-bugs-return-583395-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 18:28:13 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Tue, 28 Nov 2017 18:28:00 -0000
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--- Comment #27 from Jan Hubicka <hubicka at ucw dot cz> ---
Hi,
one of problem here is use of vgather instruction. It is hardly a win on Zen
architecture.
It is also on my TODO to adjust the code model to disable it for most loops. I
only want
to benchmark if it is a win at all in some cases or not at all to set proper
weights.
You can disable it with -mno-avx2
Still the code is bit worse than for -march=amdfam10 -mtune=k8 which is bit
funny.
I will take a look at that.
Honza
>From gcc-bugs-return-583396-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 18:52:03 2017
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Subject: [Bug libfortran/83097] Use __BYTE_ORDER__ instead of runtime test
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Janne Blomqvist from comment #4)
> Since most targets of interest for GFortran usage are little endian (x86,
> arm, ppc64le) I'm not sure it's worth the bother to do the memcmp_char4
> optimization.
In that case, let's just close this.
>From gcc-bugs-return-583397-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 18:53:27 2017
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Subject: [Bug ipa/82808] [7/8 Regression] LTO clone wrong value
Date: Tue, 28 Nov 2017 18:53:00 -0000
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--- Comment #9 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Tue Nov 28 18:52:49 2017
New Revision: 255212
URL: https://gcc.gnu.org/viewcvs?rev=255212&root=gcc&view=rev
Log:
[PR 82808] Use proper result types for arithmetic jump functions
2017-11-28 Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
Martin Jambor <mjambor@suse.cz>
PR ipa/82808
* tree.h (expr_type_first_operand_type_p): Declare
* tree.c (expr_type_first_operand_type_p): New function.
* ipa-prop.h (ipa_get_type): Allow i to be out of bounds.
(ipa_value_from_jfunc): Adjust declaration.
* ipa-cp.c (ipa_get_jf_pass_through_result): New parameter RES_TYPE.
Use it as result type for arithmetics, unless it is NULL in which case
be more conservative.
(ipa_value_from_jfunc): New parameter PARM_TYPE, pass it to
ipa_get_jf_pass_through_result.
(propagate_vals_across_pass_through): Likewise.
(propagate_scalar_across_jump_function): New parameter PARM_TYPE, pass
is to propagate_vals_across_pass_through.
(propagate_constants_across_call): Pass PARM_TYPE to
propagate_scalar_across_jump_function.
(find_more_scalar_values_for_callers_subset): Pass parameter type to
ipa_value_from_jfunc.
(cgraph_edge_brings_all_scalars_for_node): Likewise.
* ipa-fnsummary.c (evaluate_properties_for_edge): Renamed parms_info
to caller_parms_info, pass parameter type to ipa_value_from_jfunc.
* ipa-prop.c (try_make_edge_direct_simple_call): New parameter
target_type, pass it to ipa_value_from_jfunc.
(update_indirect_edges_after_inlining): Pass parameter type to
try_make_edge_direct_simple_call.
testsuite/
* gcc.dg/ipa/pr82808.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/ipa/pr82808.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-cp.c
trunk/gcc/ipa-fnsummary.c
trunk/gcc/ipa-prop.c
trunk/gcc/ipa-prop.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.c
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>From gcc-bugs-return-583398-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 18:58:08 2017
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Subject: [Bug fortran/54613] [F03] [F08] Add FINDLOC plus support MAXLOC/MINLOC with KIND=/BACKDate: Tue, 28 Nov 2017 18:58:00 -0000
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CC| |tkoenig at gcc dot gnu.org
--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
KIND is done (PR 29600).
Still to do: FINDLOC and BACK.
>From gcc-bugs-return-583399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 19:25:24 2017
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Subject: [Bug c/82050] [8 Regression] ICE on invalid code on x86_64-linux-gnu in column_range, at diagnostic-show-locus.c:1403
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--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Tue Nov 28 19:24:35 2017
New Revision: 255214
URL: https://gcc.gnu.org/viewcvs?rev=255214&root=gcc&view=rev
Log:
Reject fix-it hints for various awkward boundary cases (PR c/82050)
PR c/82050 reports a failed assertion deep within diagnostic_show_locus's
code for printing fix-it hints.
The root cause is a fix-it hint suggesting a textual replacement,
where the affected column numbers straddle the LINE_MAP_MAX_COLUMN_NUMBER
boundary, so that the start of the range has a column number, but the
end of the range doesn't.
The fix is to verify that the column numbers are sane when adding fix-it
hints to a rich_location, rejecting fix-it hints where they are not.
libcpp/ChangeLog:
PR c/82050
* include/line-map.h (LINE_MAP_MAX_COLUMN_NUMBER): Move here.
* line-map.c (LINE_MAP_MAX_COLUMN_NUMBER): ...from here.
(rich_location::maybe_add_fixit): Reject fix-it hints in which
the start column exceeds the next column.
Modified:
trunk/libcpp/ChangeLog
trunk/libcpp/include/line-map.h
trunk/libcpp/line-map.c
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Subject: [Bug fortran/53796] I/O INQUIRE of RECL: If not specified in OPEN, the default value should be returned (sequential access)
Date: Tue, 28 Nov 2017 19:29:00 -0000
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--- Comment #19 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Author: jb
Date: Tue Nov 28 19:28:50 2017
New Revision: 255215
URL: https://gcc.gnu.org/viewcvs?rev=255215&root=gcc&view=rev
Log:
PR 53796 Improve INQUIRE(RECL=...) handling
The current F2018 draft (N2137) specifies behavior of the RECL=
specifier in the INQUIRE statement, where it previously was left as
undefined. Namely:
- If the unit is not connected, RECL= should be given the value -1.
- If the unit is connected with stream access, RECL= should be given
the value -2.
Further, as PR 53796 describes, the handling of RECL= is poor in other
ways as well. When the recl is set to the maximum possible
(GFC_INTEGER_8_HUGE / LLONG_MAX), which it does by default except for
preconnected units, and when INQUIRE(RECL=) is used with a 4 byte
integer, the value is truncated and the 4 byte value is thus
-1. Fixing this to generate an error is a lot of work, as currently
the truncation is done by the frontend, the library sees only an 8
byte value with no indication that the frontend is going to copy it to
a 4 byte one. Instead, this patch does a bit twiddling trick such that
the truncated 4 byte value is GFC_INTEGER_4_HUGE while still being
0.99999999 * GFC_INTEGER_8_HUGE which is large enough for all
practical purposes.
Finally, the patch removes GFORTRAN_DEFAULT_RECL which was used only
for preconnected units, and instead uses the same approach as describe
above.
Regtested on x86_64-pc-linux-gnu, Ok for trunk.
gcc/fortran/ChangeLog:
2017-11-28 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/53796
* gfortran.texi: Remove mentions of GFORTRAN_DEFAULT_RECL.
libgfortran/ChangeLog:
2017-11-28 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/53796
* io/inquire.c (inquire_via_unit): Set recl to -1 for unconnected
units.
* io/io.h (default_recl): New variable.
* io/open.c (new_unit): Set recl to default_recl for sequential,
-2 for stream access.
* io/transfer.c (read_block_form): Test against default_recl
instead of DEFAULT_RECL.
(write_block): Likewise.
* io/unit.c (init_units): Calculate max_offset, default_recl.
* libgfortran.h (DEFAULT_RECL): Remove.
* runtime/environ.c: Remove GFORTRAN_DEFAULT_RECL.
gcc/testsuite/ChangeLog:
2017-11-28 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/53796
* gfortran.dg/inquire_recl_f2018.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/inquire_recl_f2018.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/gfortran.texi
trunk/gcc/testsuite/ChangeLog
trunk/libgfortran/io/inquire.c
trunk/libgfortran/io/io.h
trunk/libgfortran/io/open.c
trunk/libgfortran/io/transfer.c
trunk/libgfortran/io/unit.c
trunk/libgfortran/libgfortran.h
trunk/libgfortran/runtime/environ.c
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Subject: [Bug c/82050] [8 Regression] ICE on invalid code on x86_64-linux-gnu in column_range, at diagnostic-show-locus.c:1403
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #7 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Fixed on trunk for gcc 8 by r255214.
Candidate followup patch for test coverage:
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg02459.html
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Subject: [Bug target/80881] [7/8 Regression] null pointer access in libgomp.h
Date: Tue, 28 Nov 2017 19:49:00 -0000
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--- Comment #7 from Daniel Starke <daniel.f.starke at freenet dot de> ---
Error report from Dr.Memory:
Error #1: UNADDRESSABLE ACCESS: reading 0x0000000000000000-0x0000000000000008 8
byte(s)
# 0 gomp_resolve_num_threads
[../../../../src/gcc-7.1.0/libgomp/libgomp.h:677]
# 1 GOMP_parallel
[../../../../src/gcc-7.1.0/libgomp/parallel.c:166]
# 2 main [h:\Temp\cpp017/test.c:11]
Note: @0:00:00.450 in thread 3376
Note: instruction: mov %fs:0x00 -> %rax
Backtrace from SIGSEGV in GDB:
#0 gomp_resolve_num_threads (specified=specified@entry=0, count=count@entry=0)
at ../../../../src/gcc-7.1.0/libgomp/parallel.c:47
threads_requested = <optimized out>
max_num_threads = <optimized out>
num_threads = <optimized out>
busy = <optimized out>
pool = <optimized out>
#1 0x000000000040184f in GOMP_parallel (fn=fn@entry=0x401520 <main._omp_fn.0>,
data=data@entry=0x22fe60, num_threads=num_threads@entry=0,
flags=flags@entry=0) at ../../../../src/gcc-7.1.0/libgomp/parallel.c:166
No locals.
#2 0x0000000000401604 in main () at test.c:11
var = {3.72983052e-039, 0, 7.3767739e+033, 0, 7.34706519e+033, 0,
3.20827844e-039, 0, 9.03661843e-038, 0, 3.20798697e-039, 0,
3.67341985e-039, 0, 6.86636248e-044, 0, 1.40129846e-045, 0,
7.53898574e-043, 0, 2, 0, 3.67341985e-039, 0, 3.67341985e-039, 0,
1.07899982e-043, 0, 2.75506488e-040, 0, 7.67135411e+033, 0, 0, 0,
8.59029811e+009, 0, 0, 0, 3.67390189e-039, 0, 0, 0, 5.60519386e-045, 0,
7.53898574e-043, 0, 2.00002337, 0, 1.07899982e-043, 0,
4.20389539e-045, 0, 1.77964905e-043, 0, 7.41472914e+033, 0, 3.71850803e-039, 0,
8.59029811e+009, 0, 3.67420457e-039, 0, 4.20389539e-043, 0,
3.20836812e-039, 0, 1.8758415e-012, 0, 3.72900095e-039, 0, 1.40129846e-045,
0, 3.67420457e-039, 0, 0, 0, 3.67390189e-039, 0, 0, 0,
1.07899982e-043, 0, 4.48415509e-044, 4.20389539e-045, 3.67420457e-039, 0, 0, 0,
2.80259693e-045, 0, 3.67420457e-039, 0, 0, 0, 1.40129846e-045, 0, 0,
0, 1.56945428e-043, 0, 0, 0, 0, 0, 3.72904579e-039, 0,
5.60519386e-044, 0, 3.20930979e-039, 0, 8.51989466e-043, 0,
3.20865959e-039, 0, 9.82653682e-039, 4.49998415e-039, 5.87344331e+022,
2.67781571e+020, 0, 0, 6.74539118e-039, 0, 2.38775653e-039, 0,
-2.81029619e+037, 2.86705666e-042, 0, 0, 1.83673515e-039, 0, 0, 0,
1.56945428e-043, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9.93057972e-035, 0, 0, 0,
0, 0, 0, 0, 0, 0, 9.00001315e-039, 0, 3.21108104e-039, 0,
3.20936585e-039, 0, 7.34316878e+033, 0, 3.20935604e-039, 0,
3.72902337e-039, 0, 0, 0, 3.67341985e-039, 0, 0, 1.34524653e-043,
7.18866112e-043, 2.80259693e-045, 3.67341985e-039, 0,
7.63497105e+033, 0, 3.67341985e-039, 0, 3.72900095e-039, 0, 3.21121556e-039, 0,
1.34524653e-043, 0, 0, 0, 0, 0, -nan(0x7dd000), 2.86845796e-042,
1.82959882e-018, 0, 3.67341985e-039, 0, 7.48008123e+033, 0, 0, 0,
3.72902337e-039, 0...}
PI = 3.14159274
Stack level 0, frame at 0x22edd0:
rip = 0x401629 in gomp_resolve_num_threads
(../../../../src/gcc-7.1.0/libgomp/parallel.c:47); saved rip 0x40184f
called by frame at 0x22ee30
source language c.
Arglist at 0x22ed88, args: specified=specified@entry=0, count=count@entry=0
Locals at 0x22ed88, Previous frame's sp is 0x22edd0
Saved registers:
rbx at 0x22edb0, rsi at 0x22edb8, rdi at 0x22edc0, rip at 0x22edc8, xmm15 at
0x22edc8
Used mingw-w64-v5.0.2.
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Subject: [Bug gcov-profile/83200] New: Unable to manipulate (prefix, strip) coverage/profile data file (.gcda) paths at compile time
Date: Tue, 28 Nov 2017 20:01:00 -0000
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Bug ID: 83200
Summary: Unable to manipulate (prefix, strip) coverage/profile
data file (.gcda) paths at compile time
Product: gcc
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Created attachment 42739
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42739&action=edit
Patch to add options -fprofile-dir-prefix, -fprofile-dir-strip
Using the run-time environment variables GCOV_PREFIX and GCOV_PREFIX_STRIP is
not always practical, e.g. profiling a large number of components in a system,
especially things like system daemons that are launched with their own
environment.
Utilizing similar logic to the parsing of those variables at compile-time
allows for path manipulation independent of the run-time modifications. This is
particularly useful in order to get the current working directory at the time
of compilation, which in complex build systems may be hard to reproduce
statically with an -fprofile-dir parameter.
The attached patch has been tested (and is being used) against gcc-5.3.0 and
cleanly ports to current trunk/master (though is presently unused/untested) and
seems to help address this issue for my uses.
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Subject: [Bug lto/83201] New: SPEC CPU2017 505.mcf_f produces incorrect output when built with -flto and FDO
Date: Tue, 28 Nov 2017 20:12:00 -0000
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Bug ID: 83201
Summary: SPEC CPU2017 505.mcf_f produces incorrect output when
built with -flto and FDO
Product: gcc
Version: 8.0
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Host: powerpc64le-unknown-linux-gnu
Target: powerpc64le-unknown-linux-gnu
Build: powerpc64le-unknown-linux-gnu
505.mcf_f produces incorrect output when built with both LTO/FDO. Using either
option separately is fine. GCC trunk r255207 was used. Following are options
used.
OPTIMIZE = -O3 -mcpu=power8 -flto
PASS1_FLAGS = -fprofile-generate
PASS1_LDFLAGS = -fprofile-generate
PASS2_FLAGS = -fprofile-use
PASS2_LDFLAGS = -fprofile-use
Contents of inp.out.mis (miscompares).
0010: simplex iterations : 107102
simplex iterations : 107598
^
0014: simplex iterations : 152479
simplex iterations : 149876
^
0016: erased arcs : 995716
erased arcs : 995702
^
0017: new implicit arcs : 2995716
new implicit arcs : 2995702
^
0019: simplex iterations : 253145
simplex iterations : 248008
^
0020: objective value : 12161789395
objective value : 12171761765
^
0021: erased arcs : 2991635
erased arcs : 2991537
^
0022: new implicit arcs : 2991635
new implicit arcs : 2991537
^
0024: simplex iterations : 398127
simplex iterations : 385785
^
0025: objective value : 11729854482
objective value : 11769820561
^
It appears to work fine with r254943. I'll start a bisect and post results.
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Subject: [Bug ipa/83179] [8 regression] gcc.dg/ipa/inline-1.c fail
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----------------------------------------------------------------------------
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--- Comment #8 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Confirmed on arm and aarch64 as well.
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Subject: [Bug lto/83201] SPEC CPU2017 505.mcf_f produces incorrect output when built with -flto and FDO
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--- Comment #1 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
It may be latent for a while -- the same problem exists with GCC 7. (Well,
technically with branches/ibm/gcc-7-branch.)
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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--- Comment #1 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Confirmed on arm and aarch64 as well.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83202
Bug ID: 83202
Summary: Try joining operations on consecutive array elements
during tree vectorization
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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void test(double data[4][4])
{
for (int i = 0; i < 4; i++)
{
for (int j = i; j < 4; j+=2)
{
data[i][j] = data[i][j] * data[i][j];
data[i][j+1] = data[i][j+1] * data[i][j+1];
}
}
}
gcc creates this:
test(double (*) [4]):
vmovsd xmm0, QWORD PTR [rdi]
vmulsd xmm0, xmm0, xmm0
vmovsd QWORD PTR [rdi], xmm0
vmovsd xmm0, QWORD PTR [rdi+8]
vmulsd xmm0, xmm0, xmm0
vmovsd QWORD PTR [rdi+8], xmm0
vmovsd xmm0, QWORD PTR [rdi+16]
vmulsd xmm0, xmm0, xmm0
vmovsd QWORD PTR [rdi+16], xmm0
vmovsd xmm0, QWORD PTR [rdi+24]
vmulsd xmm0, xmm0, xmm0
vmovsd QWORD PTR [rdi+24], xmm0
vmovsd xmm0, QWORD PTR [rdi+40]
vmulsd xmm0, xmm0, xmm0
vmovsd QWORD PTR [rdi+40], xmm0
vmovsd xmm0, QWORD PTR [rdi+48]
vmulsd xmm0, xmm0, xmm0
vmovsd QWORD PTR [rdi+48], xmm0
vmovsd xmm0, QWORD PTR [rdi+56]
vmulsd xmm0, xmm0, xmm0
vmovsd QWORD PTR [rdi+56], xmm0
vmovsd xmm0, QWORD PTR [rdi+64]
vmulsd xmm0, xmm0, xmm0
vmovsd QWORD PTR [rdi+64], xmm0
vmovsd xmm0, QWORD PTR [rdi+80]
vmulsd xmm0, xmm0, xmm0
vmovsd QWORD PTR [rdi+80], xmm0
vmovsd xmm0, QWORD PTR [rdi+88]
vmulsd xmm0, xmm0, xmm0
vmovsd QWORD PTR [rdi+88], xmm0
vmovsd xmm0, QWORD PTR [rdi+120]
vmulsd xmm0, xmm0, xmm0
vmovsd QWORD PTR [rdi+120], xmm0
vmovsd xmm0, QWORD PTR [rdi+128]
vmulsd xmm0, xmm0, xmm0
vmovsd QWORD PTR [rdi+128], xmm0
ret
clang detects that it is possible to use packed operations instead of scalar
ones, and produces this. Please implement similar optimization in gcc too.
test(double (*) [4]): # @test(double (*) [4])
vmovupd xmm0, xmmword ptr [rdi]
vmovupd xmm1, xmmword ptr [rdi + 16]
vmovupd xmm2, xmmword ptr [rdi + 40]
vmovupd xmm3, xmmword ptr [rdi + 56]
vmulpd xmm0, xmm0, xmm0
vmovupd xmmword ptr [rdi], xmm0
vmulpd xmm0, xmm1, xmm1
vmovupd xmmword ptr [rdi + 16], xmm0
vmulpd xmm0, xmm2, xmm2
vmovupd xmmword ptr [rdi + 40], xmm0
vmulpd xmm0, xmm3, xmm3
vmovupd xmmword ptr [rdi + 56], xmm0
vmovupd xmm0, xmmword ptr [rdi + 80]
vmulpd xmm0, xmm0, xmm0
vmovupd xmmword ptr [rdi + 80], xmm0
vmovupd xmm0, xmmword ptr [rdi + 120]
vmulpd xmm0, xmm0, xmm0
vmovupd xmmword ptr [rdi + 120], xmm0
ret
>From gcc-bugs-return-583409-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 21:23:31 2017
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Subject: [Bug sanitizer/81275] [6/7/8 Regression] -fsanitize=thread produce incorrect -Wreturn-type warning
Date: Tue, 28 Nov 2017 21:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81275
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 28 21:22:52 2017
New Revision: 255217
URL: https://gcc.gnu.org/viewcvs?rev=255217&root=gcc&view=rev
Log:
PR sanitizer/81275
* tree.c (block_may_fallthru): Return false if SWITCH_ALL_CASES_P
is set on SWITCH_EXPR and !block_may_fallthru (SWITCH_BODY ()).
c/
* c-typeck.c (c_finish_case): Set SWITCH_ALL_CASES_P if
c_switch_covers_all_cases_p returns true.
c-family/
* c-common.c (c_switch_covers_all_cases_p_1,
c_switch_covers_all_cases_p): New functions.
* c-common.h (c_switch_covers_all_cases_p): Declare.
testsuite/
* c-c++-common/tsan/pr81275.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/tsan/pr81275.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/c-family/c-common.h
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-typeck.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.c
trunk/gcc/tree.h
>From gcc-bugs-return-583410-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 21:25:27 2017
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Subject: [Bug sanitizer/81275] [6/7/8 Regression] -fsanitize=thread produce incorrect -Wreturn-type warning
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81275
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Nov 28 21:24:32 2017
New Revision: 255218
URL: https://gcc.gnu.org/viewcvs?rev=255218&root=gcc&view=rev
Log:
PR sanitizer/81275
* cp-tree.h (SWITCH_STMT_ALL_CASES_P): Define.
(SWITCH_STMT_NO_BREAK_P): Define.
(note_break_stmt, note_iteration_stmt_body_start,
note_iteration_stmt_body_end): Declare.
* decl.c (struct cp_switch): Add has_default_p, break_stmt_seen_p
and in_loop_body_p fields.
(push_switch): Clear them.
(pop_switch): Set SWITCH_STMT_CANNOT_FALLTHRU_P if has_default_p
and !break_stmt_seen_p. Assert in_loop_body_p is false.
(note_break_stmt, note_iteration_stmt_body_start,
note_iteration_stmt_body_end): New functions.
(finish_case_label): Set has_default_p when both low and high
are NULL_TREE.
* parser.c (cp_parser_iteration_statement): Use
note_iteration_stmt_body_start and note_iteration_stmt_body_end
around parsing iteration body.
* pt.c (tsubst_expr): Likewise.
* cp-objcp-common.c (cxx_block_may_fallthru): Return false for
SWITCH_STMT which contains no BREAK_STMTs, contains a default:
CASE_LABEL_EXPR and where SWITCH_STMT_BODY isn't empty and
can't fallthru.
* semantics.c (finish_break_stmt): Call note_break_stmt.
* cp-gimplify.c (genericize_switch_stmt): Copy SWITCH_STMT_ALL_CASES_P
bit to SWITCH_ALL_CASES_P. Assert that if SWITCH_STMT_NO_BREAK_P then
the break label is not TREE_USED.
* g++.dg/warn/pr81275-1.C: New test.
* g++.dg/warn/pr81275-2.C: New test.
* g++.dg/warn/pr81275-3.C: New test.
* c-c++-common/tsan/pr81275.c: Skip for C++ and -O2.
Added:
trunk/gcc/testsuite/g++.dg/warn/pr81275-1.C
trunk/gcc/testsuite/g++.dg/warn/pr81275-2.C
trunk/gcc/testsuite/g++.dg/warn/pr81275-3.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/cp/cp-objcp-common.c
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl.c
trunk/gcc/cp/parser.c
trunk/gcc/cp/pt.c
trunk/gcc/cp/semantics.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/tsan/pr81275.c
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Subject: [Bug c/83202] Try joining operations on consecutive array elements during tree vectorization
Date: Tue, 28 Nov 2017 21:27:00 -0000
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--- Comment #1 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
This was compiled with -O3 -mavx -ftree-vectorize
After sending this I noticed that I wrote inner loop incorrectly, I meant one
below. Anyway, it it also not optimized:
for (int j = 0; j < i; j+=4)
I also checked code which could be optimized using operations on YMM registers:
void test(double data[8][8])
{
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < i; j+=4)
{
data[i][j] *= data[i][j];
data[i][j+1] *= data[i][j+1];
data[i][j+2] *= data[i][j+2];
data[i][j+3] *= data[i][j+3];
}
}
}
gcc output is, hmm, interesting:
test(double (*) [8]):
vmovupd xmm0, XMMWORD PTR [rdi+64]
vinsertf128 ymm0, ymm0, XMMWORD PTR [rdi+80], 0x1
vmulpd ymm0, ymm0, ymm0
vmovups XMMWORD PTR [rdi+64], xmm0
vextractf128 XMMWORD PTR [rdi+80], ymm0, 0x1
vmovupd xmm0, XMMWORD PTR [rdi+128]
vinsertf128 ymm0, ymm0, XMMWORD PTR [rdi+144], 0x1
vmulpd ymm0, ymm0, ymm0
vmovups XMMWORD PTR [rdi+128], xmm0
vextractf128 XMMWORD PTR [rdi+144], ymm0, 0x1
vmovupd xmm0, XMMWORD PTR [rdi+192]
vinsertf128 ymm0, ymm0, XMMWORD PTR [rdi+208], 0x1
vmulpd ymm0, ymm0, ymm0
vmovups XMMWORD PTR [rdi+192], xmm0
vextractf128 XMMWORD PTR [rdi+208], ymm0, 0x1
vmovupd xmm0, XMMWORD PTR [rdi+256]
vinsertf128 ymm0, ymm0, XMMWORD PTR [rdi+272], 0x1
vmulpd ymm0, ymm0, ymm0
vmovups XMMWORD PTR [rdi+256], xmm0
vextractf128 XMMWORD PTR [rdi+272], ymm0, 0x1
vmovupd xmm0, XMMWORD PTR [rdi+320]
vinsertf128 ymm0, ymm0, XMMWORD PTR [rdi+336], 0x1
vmulpd ymm0, ymm0, ymm0
vmovups XMMWORD PTR [rdi+320], xmm0
vextractf128 XMMWORD PTR [rdi+336], ymm0, 0x1
vmovupd xmm0, XMMWORD PTR [rdi+352]
vinsertf128 ymm0, ymm0, XMMWORD PTR [rdi+368], 0x1
vmulpd ymm0, ymm0, ymm0
vmovups XMMWORD PTR [rdi+352], xmm0
vextractf128 XMMWORD PTR [rdi+368], ymm0, 0x1
vmovupd xmm0, XMMWORD PTR [rdi+384]
vinsertf128 ymm0, ymm0, XMMWORD PTR [rdi+400], 0x1
vmulpd ymm0, ymm0, ymm0
vmovups XMMWORD PTR [rdi+384], xmm0
vextractf128 XMMWORD PTR [rdi+400], ymm0, 0x1
vmovupd xmm0, XMMWORD PTR [rdi+416]
vinsertf128 ymm0, ymm0, XMMWORD PTR [rdi+432], 0x1
vmulpd ymm0, ymm0, ymm0
vmovups XMMWORD PTR [rdi+416], xmm0
vextractf128 XMMWORD PTR [rdi+432], ymm0, 0x1
vmovupd xmm0, XMMWORD PTR [rdi+448]
vinsertf128 ymm0, ymm0, XMMWORD PTR [rdi+464], 0x1
vmulpd ymm0, ymm0, ymm0
vmovups XMMWORD PTR [rdi+448], xmm0
vextractf128 XMMWORD PTR [rdi+464], ymm0, 0x1
vmovupd xmm0, XMMWORD PTR [rdi+480]
vinsertf128 ymm0, ymm0, XMMWORD PTR [rdi+496], 0x1
vmulpd ymm0, ymm0, ymm0
vmovups XMMWORD PTR [rdi+480], xmm0
vextractf128 XMMWORD PTR [rdi+496], ymm0, 0x1
vzeroupper
ret
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Subject: [Bug tree-optimization/83202] Try joining operations on consecutive array elements during tree vectorization
Date: Tue, 28 Nov 2017 21:33:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Component|c |tree-optimization
Severity|normal |enhancement
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--- Comment #8 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Tue Nov 28 21:45:56 2017
New Revision: 255219
URL: https://gcc.gnu.org/viewcvs?rev=255219&root=gcc&view=rev
Log:
Handle very long lines when printing fix-it hints
When fixing PR c/82050 I noticed a bug in how we print fix-it hints
for very long lines: we weren't taking into account the x-offset for
the line when printing the fix-it hint.
This could lead to output where instead of printing:
foo.c:14:3944: error: etc
= foo.field
^~~~~
replacement
where the lines have been offset to start printing at about column 3900,
the "replacement" line was erroneously *not* offset, and was thus
prefixed by thousands of spaces, leading to large whitespace gaps in
the output, and the replacement failing to line up with the source to be
replaced.
Fixed thusly.
gcc/ChangeLog:
* diagnostic-show-locus.c (layout::print_trailing_fixits): Handle
m_x_offset.
(layout::move_to_column): Likewise.
gcc/testsuite/ChangeLog:
* gcc.dg/plugin/diagnostic-test-show-locus-bw.c
(test_very_wide_line): Update expected output to include a
fix-it hint.
* gcc.dg/plugin/diagnostic-test-show-locus-color.c
(test_very_wide_line): Likewise.
* gcc.dg/plugin/diagnostic_plugin_test_show_locus.c
(test_show_locus): Add a fix-it hint to "test_very_wide_line".
Modified:
trunk/gcc/ChangeLog
trunk/gcc/diagnostic-show-locus.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/plugin/diagnostic-test-show-locus-bw.c
trunk/gcc/testsuite/gcc.dg/plugin/diagnostic-test-show-locus-color.c
trunk/gcc/testsuite/gcc.dg/plugin/diagnostic_plugin_test_show_locus.c
>From gcc-bugs-return-583414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 22:42:16 2017
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From: "zoltan at hidvegi dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83203] New: Inefficient int to avx2 vector conversion
Date: Tue, 28 Nov 2017 22:42:00 -0000
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Bug ID: 83203
Summary: Inefficient int to avx2 vector conversion
Product: gcc
Version: 7.2.1
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Target: x86_64-*-*
__m256i foo(long x) { return (__m256i){x}; }
gcc -mavx2 -O2 generates
20: c5 f9 ef c0 vpxor %xmm0,%xmm0,%xmm0
24: c4 e3 f9 22 c7 00 vpinsrq $0x0,%rdi,%xmm0,%xmm0
2a: c5 f9 6f c0 vmovdqa %xmm0,%xmm0
It should just use vmovq %rdi,%xmm0
Workaround is to use _mm256_castsi128_si256((__m128i){x})
>From gcc-bugs-return-583415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 22:53:40 2017
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Subject: [Bug lto/83201] SPEC CPU2017 505.mcf_f produces incorrect output when built with -flto and FDO
Date: Tue, 28 Nov 2017 22:53:00 -0000
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--- Comment #2 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
(In reply to Pat Haugen from comment #0)
>
> It appears to work fine with r254943. I'll start a bisect and post results.
My bisect showed that r254946 was where it started failing on trunk. And yes,
it fails with current GCC 7 branch too.
>From gcc-bugs-return-583416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 28 22:57:29 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83191] [7/8 Regression] Writing a namelist with repeated complex numbers
Date: Tue, 28 Nov 2017 22:57:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The following patch does the trick:
--- ../_clean/libgfortran/io/write.c 2017-11-22 20:37:44.000000000 +0100
+++ libgfortran/io/write.c 2017-11-28 23:45:55.000000000 +0100
@@ -1552,7 +1552,7 @@ select_string (st_parameter_dt *dtp, con
int kind)
{
char *result;
- *size = size_from_kind (dtp, f, kind) + f->u.real.d;
+ *size = size_from_kind (dtp, f, kind) + f->u.real.d + 1;
if (*size > BUF_STACK_SZ)
result = xmalloc (*size);
else
@@ -1769,7 +1769,8 @@ write_real_g0 (st_parameter_dt *dtp, con
static void
-write_complex (st_parameter_dt *dtp, const char *source, int kind, size_t
size)
+write_complex (st_parameter_dt *dtp, const char *source, int kind, size_t
size,
+ bool justify)
{
char semi_comma =
dtp->u.p.current_unit->decimal_status == DECIMAL_POINT ? ',' : ';';
@@ -1809,9 +1810,12 @@ write_complex (st_parameter_dt *dtp, con
precision, buf_size, result1, &res_len1);
get_float_string (dtp, &f, source + size / 2 , kind, 0, buffer,
precision, buf_size, result2, &res_len2);
- lblanks = width - res_len1 - res_len2 - 3;
+ if (justify)
+ {
+ lblanks = width - res_len1 - res_len2 - 3;
- write_x (dtp, lblanks, lblanks);
+ write_x (dtp, lblanks, lblanks);
+ }
write_char (dtp, '(');
write_float_string (dtp, result1, res_len1);
write_char (dtp, semi_comma);
@@ -1889,7 +1893,7 @@ list_formatted_write_scalar (st_paramete
write_real (dtp, p, kind);
break;
case BT_COMPLEX:
- write_complex (dtp, p, kind, size);
+ write_complex (dtp, p, kind, size, true);
break;
case BT_CLASS:
{
@@ -2202,7 +2206,7 @@ nml_write_obj (st_parameter_dt *dtp, nam
case BT_COMPLEX:
dtp->u.p.no_leading_blank = 0;
num++;
- write_complex (dtp, p, len, obj_size);
+ write_complex (dtp, p, len, obj_size, false);
break;
case BT_DERIVED:
>From gcc-bugs-return-583417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 01:48:37 2017
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Subject: [Bug c++/83204] New: [6/7/8 Regression] c++ -std=c++14 ICE in maybe_undo_parenthesized_ref, at cp/semantics.c:1694
Date: Wed, 29 Nov 2017 01:48:00 -0000
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Bug ID: 83204
Summary: [6/7/8 Regression] c++ -std=c++14 ICE in
maybe_undo_parenthesized_ref, at cp/semantics.c:1694
Product: gcc
Version: 7.2.1
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[forwarded from https://bugs.debian.org/882855]
not seen with GCC 5, but with the 6, 7 branches and the trunk, not seen in
c++11 mode.
$ cat test.cpp
int rand();
template<typename T>
struct s
{
int count() { return rand(); }
};
template<typename v>
int f(s<v> a)
{
int const x = a.count();
int r = 0;
auto l = [&](int& r)
{
for(int y = 0, yend = (x); y < yend; ++y)
{
r += y;
}
};
l(r);
}
template int f(s<float>);
int main()
{
}
$ g++ -std=c++14 -c test.cpp
test.cpp: In instantiation of 'f(s<v>)::<lambda(int&)> [with v = float]':
test.cpp:14:16: required from 'struct f(s<v>) [with v =
float]::<lambda(int&)>'
test.cpp:20:5: required from 'int f(s<v>) [with v = float]'
test.cpp:24:24: required from here
test.cpp:16:33: internal compiler error: in maybe_undo_parenthesized_ref, at
cp/semantics.c:1694
for(int y = 0, yend = (x); y < yend; ++y)
^
Please submit a full bug report,
with preprocessed source if appropriate.
>From gcc-bugs-return-583418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 02:39:54 2017
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Subject: [Bug fortran/83191] [7/8 Regression] Writing a namelist with repeated complex numbers
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--- Comment #4 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Alternatively one could do this:
@@ -1809,9 +1809,11 @@ write_complex (st_parameter_dt *dtp, const char *source,
int kind, size_t size)
precision, buf_size, result1, &res_len1);
get_float_string (dtp, &f, source + size / 2 , kind, 0, buffer,
precision, buf_size, result2, &res_len2);
- lblanks = width - res_len1 - res_len2 - 3;
-
- write_x (dtp, lblanks, lblanks);
+ if (!dtp->u.p.namelist_mode)
+ {
+ lblanks = width - res_len1 - res_len2 - 3;
+ write_x (dtp, lblanks, lblanks);
+ }
write_char (dtp, '(');
write_float_string (dtp, result1, res_len1);
write_char (dtp, semi_comma);
>From gcc-bugs-return-583419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 02:47:40 2017
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From: Sarah Perez <sarahph69gperez@gmail.com>
To: gcc-bugs@gcc.gnu.org
Subject: burculi.com
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Hi!
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Subject: [Bug target/81363] [8 regression] FAIL: gcc.dg/vect/pr51581-1.c (internal compiler error)
Date: Wed, 29 Nov 2017 02:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81363
--- Comment #2 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> This went away with r250295 which reverted some earlier commit. Was the
> patch reverted because of this LRA ICE, or for some other reason. I.e. can
> we close it as RESOLVED/FIXED, or is there a plan to reapply the patch
> eventually and something we should get RA folks involved in?
I don't think this problem matches the reason for the revert directly, but it
might have caused it indirectly. Carl's original code was fine, but he added
some standard patterns we had been missing before, allowing vectorization to
kick in for cases where it previously hadn't. This exposed a bug in the
powerpc back end, which I fixed in https://gcc.gnu.org/r251161. Carl then
re-committed his patches in https://gcc.gnu.org/r252027.
I don't believe the bug that I fixed could have caused the mismatched vector
modes that showed up in this bug report, but I could be wrong. It's
theoretically possible that there is an RA bug hiding here, but it doesn't
reproduce anymore.
At this point I'd suggest closing this as RESOLVED/FIXED since the work on
vec_mule and vec_mulo is complete, and the bug is no longer occurring.
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From: "jcemmett1 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83205] New: ICE on structured binding with ill-formed negative std::tuple_size<T>::value
Date: Wed, 29 Nov 2017 03:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83205
Bug ID: 83205
Summary: ICE on structured binding with ill-formed negative
std::tuple_size<T>::value
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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The following ill-formed code results in an ICE with GCC 8. Needs only
-std=c++17.
=====
struct Foo { int i; };
namespace std {
template <typename T> struct tuple_size;
template <> struct tuple_size<Foo> {
static constexpr int value = -1;
};
}
int main()
{
auto [i] = Foo{};
}
=====
Output:
GNU C++17 (GCC-Explorer-Build) version 8.0.0 20171128 (experimental)
(x86_64-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 6355e9ef8f7b704fe373fdf166e4fd6e
<source>: In function 'int main()':
14 : <source>:14:20: internal compiler error: in tree_to_uhwi, at tree.c:6643
auto [i] = Foo{};
^
mmap: Cannot allocate memory
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler exited with result code 1
Godbolt link: https://godbolt.org/g/NJ6fLG
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/83168] FAIL: gfortran.dg/fmt_f0_2.f90 with a sanitized libgfortran
Date: Wed, 29 Nov 2017 03:08:00 -0000
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--- Comment #6 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Wed Nov 29 03:07:43 2017
New Revision: 255225
URL: https://gcc.gnu.org/viewcvs?rev=255225&root=gcc&view=rev
Log:
2017-11-28 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/83168
* io/write.c (select_string): Bump size by one to avoid
overrun.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/write.c
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Wed, 29 Nov 2017 04:02:00 -0000
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--- Comment #28 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Adding -mno-avx2 into the mix was a marginal win, but only just showing out of
the noise:
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -mprefer-vector-width=none
-mno-fma -mno-avx2 -O3 matrix.c -o matrix
mult took 121397 clocks
mult took 124373 clocks
mult took 125345 clocks
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -mprefer-vector-width=none
-mno-fma -O3 matrix.c -o matrix
mult took 123262 clocks
mult took 128193 clocks
mult took 125891 clocks
Using -Ofast instead of -O3
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -mprefer-vector-width=none
-mno-fma -Ofast matrix.c -o matrix
mult took 125163 clocks
mult took 123799 clocks
mult took 122808 clocks
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -mprefer-vector-width=none
-mno-fma -mno-avx2 -Ofast matrix.c -o matrix
mult took 130189 clocks
mult took 122726 clocks
mult took 123686 clocks
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Wed, 29 Nov 2017 04:47:00 -0000
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--- Comment #29 from Andrew Roberts <andrewm.roberts at sky dot com> ---
And rerunning all the tests for matrix.c on Ryzen using:
-march=$amarch -mtune=$amtune -mprefer-vector-width=none -mno-fma -O3
The winners were:
mult took 118145 clocks -march=broadwell -mtune=broadwell
mult took 118912 clocks -march=core-avx2 -mtune=core-avx2
Top -mtune=znver1
mult took 121845 clocks -march=core-avx2 -mtune=znver1
mult took 129241 clocks -march=znver1 -mtune=znver1
And the bottom of the list no longer has a cluster of -mtune= btverX, bdverX,
znver1
Worst cases:
mult took 253400 clocks -march=x86-64 -mtune=haswell
mult took 254006 clocks -march=bonnell -mtune=westmere
mult took 254624 clocks -march=bonnell -mtune=silvermont
mult took 258577 clocks -march=bonnell -mtune=nehalem
mult took 260612 clocks -march=bonnell -mtune=corei7
mult took 277789 clocks -march=nocona -mtune=nano-x4
---------
And rerunning all the tests for matrix.c on Ryzen using:
-march=$amarch -mtune=$amtune -mprefer-vector-width=none -mno-fma -mno-avx2
-Ofast
The winners were:
mult took 116405 clocks -march=broadwell -mtune=broadwell
mult took 117314 clocks -march=ivybridge -mtune=haswell
mult took 117551 clocks -march=broadwell -mtune=bdver2
Top znver1:
mult took 119951 clocks -march=knl -mtune=znver1
mult took 120442 clocks -march=znver1 -mtune=znver1
Worst cases:
mult took 239640 clocks -march=nehalem -mtune=bdver3
mult took 240623 clocks -march=athlon64-sse3 -mtune=silvermont
mult took 241143 clocks -march=eden-x2 -mtune=nano-2000
mult took 241547 clocks -march=core2 -mtune=intel
mult took 241870 clocks -march=nehalem -mtune=bdver2
mult took 248251 clocks -march=nocona -mtune=intel
The differences between broadwell and znver1 is within the margin of error I
would suggest, with these options.
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Subject: [Bug fortran/83191] [7/8 Regression] Writing a namelist with repeated complex numbers
Date: Wed, 29 Nov 2017 05:01:00 -0000
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--- Comment #5 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Jerry DeLisle from comment #4)
> Alternatively one could do this:
>
> @@ -1809,9 +1809,11 @@ write_complex (st_parameter_dt *dtp, const char
> *source, int kind, size_t size)
> precision, buf_size, result1, &res_len1);
> get_float_string (dtp, &f, source + size / 2 , kind, 0, buffer,
> precision, buf_size, result2, &res_len2);
> - lblanks = width - res_len1 - res_len2 - 3;
> -
> - write_x (dtp, lblanks, lblanks);
> + if (!dtp->u.p.namelist_mode)
> + {
> + lblanks = width - res_len1 - res_len2 - 3;
> + write_x (dtp, lblanks, lblanks);
> + }
> write_char (dtp, '(');
> write_float_string (dtp, result1, res_len1);
> write_char (dtp, semi_comma);
With the following tweak:
@@ -1950,6 +1952,7 @@ list_formatted_write (st_parameter_dt *dtp, bt type, void
*p, int kind,
size * GFC_SIZE_OF_CHAR_KIND(kind) : size;
tmp = (char *) p;
+ dtp->u.p.namelist_mode = 0;
/* Big loop over all the elements. */
for (elem = 0; elem < nelems; elem++)
@@ -2394,6 +2397,7 @@ namelist_write (st_parameter_dt *dtp)
char c;
char *dummy_name = NULL;
+ dtp->u.p.namelist_mode = 1;
/* Set the delimiter for namelist output. */
switch (dtp->u.p.current_unit->delim_status)
{
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Subject: [Bug driver/83206] New: -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
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Bug ID: 83206
Summary: -mfpu=auto does not work on ARM
(armv7l-unknown-linux-gnueabihf)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
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On ARM an option to -mfpu is auto, this is given when you do:
/usr/local/gcc/bin/gcc -mcpu=native -Q --help=target
...
Known ARM FPUs (for use with the -mfpu= option):
auto crypto-neon-fp-armv8 fp-armv8 fpv4-sp-d16 fpv5-d16 fpv5-sp-d16 neon
neon-fp-armv8 neon-fp16 neon-vfpv3 neon-vfpv4 vfp vfp3 vfpv2 vfpv3
vfpv3-d16
vfpv3-d16-fp16 vfpv3-fp16 vfpv3xd vfpv3xd-fp16 vfpv4 vfpv4-d16
If you try:
/usr/local/gcc/bin/gcc -mcpu=native -mfpu=auto -Q --help=target
You get:
-mfpu= auto
But if you try to use it:
gcc -march=native -mcpu=native -mtune=native -mfpu=auto -Ofast -o matrix
matrix.c
You get:
cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
which isn't true as:
gcc -march=native -mcpu=native -mtune=native -mfpu=neon -Ofast -o matrix
matrix.c
works
as does
-mfpu=vfpv3-d16
etc
This is true on:
armv7l and armv6l at least, tested on:
ODROID-XU3: (ARM big/little Cortex-A15/A7)
Raspbery Pi B: (ARM ARM1176)
Raspberry Pi 2B v1: (ARM Cortex-A7)
Raspberry Pi 3B: (ARM Cortex-A53)
>From gcc-bugs-return-583427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 07:13:30 2017
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From: "andrewm.roberts at sky dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/83207] New: On ARM -mcpu=native does not detect ARM big/little cpu combinations correctly (armv7l-unknown-linux-gnueabihf)
Date: Wed, 29 Nov 2017 07:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83207
Bug ID: 83207
Summary: On ARM -mcpu=native does not detect ARM big/little cpu
combinations correctly
(armv7l-unknown-linux-gnueabihf)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
Assignee: unassigned at gcc dot gnu.org
Reporter: andrewm.roberts at sky dot com
Target Milestone: ---
On ARM autodetection of the CPU using -mcpu=native does not give the expected
results on ARM big/little combinations.
/usr/local/gcc/bin/gcc -mcpu=native -Q --help=target | grep mcpu
-mcpu= cortex-a7
So it didn't pick:
cortex-a15.cortex-a7
Tested on Hardkernel Odroid XU4
CPU Model:
4 x Cortex-A15 rev 3 (0x4100c0f0)
4 x Cortex-A7 rev 3 (0x4100c070)
/usr/local/gcc/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-8.0.0/libexec/gcc/armv7l-unknown-linux-gnueabihf/8.0.0/lto-wrapper
Target: armv7l-unknown-linux-gnueabihf
Configured with: ../gcc-8.0.0/configure --prefix=/usr/local/gcc-8.0.0
--program-suffix= --disable-werror --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-gnu-indirect-function --enable-lto --with-isl
--enable-languages=c,c++,fortran,lto --disable-libgcj --enable-clocale=gnu
--disable-libstdcxx-pch --enable-install-libiberty --disable-multilib
--disable-libssp --enable-default-pie --enable-default-ssp
--host=armv7l-unknown-linux-gnueabihf --build=armv7l-unknown-linux-gnueabihf
--with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171126 (experimental) (GCC)
>From gcc-bugs-return-583428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 07:19:38 2017
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
Date: Wed, 29 Nov 2017 07:19:00 -0000
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--- Comment #1 from Andrew Roberts <andrewm.roberts at sky dot com> ---
This was tested using:
/usr/local/gcc/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-8.0.0/libexec/gcc/armv7l-unknown-linux-gnueabihf/8.0.0/lto-wrapper
Target: armv7l-unknown-linux-gnueabihf
Configured with: ../gcc-8.0.0/configure --prefix=/usr/local/gcc-8.0.0
--program-suffix= --disable-werror --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-gnu-indirect-function --enable-lto --with-isl
--enable-languages=c,c++,fortran,lto --disable-libgcj --enable-clocale=gnu
--disable-libstdcxx-pch --enable-install-libiberty --disable-multilib
--disable-libssp --enable-default-pie --enable-default-ssp
--host=armv7l-unknown-linux-gnueabihf --build=armv7l-unknown-linux-gnueabihf
--with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171126 (experimental) (GCC)
and its wasn't a ODROID-XU3 it was a Hardkernel Odroid XU4
>From gcc-bugs-return-583429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 07:50:13 2017
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Subject: [Bug target/81363] [8 regression] FAIL: gcc.dg/vect/pr51581-1.c (internal compiler error)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
.
>From gcc-bugs-return-583430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 07:52:43 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83208] New: [arm-linux-gnueabi-gcc] wrong code at optimization level -O2 and -O3 for union assignment
Date: Wed, 29 Nov 2017 07:52:00 -0000
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Bug ID: 83208
Summary: [arm-linux-gnueabi-gcc] wrong code at optimization
level -O2 and -O3 for union assignment
Product: gcc
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$ arm-linux-gnueabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc-cross/arm-linux-gnueabi/5/lto-wrapper
Target: arm-linux-gnueabi
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
5.4.0-6ubuntu1~16.04.4' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm
--disable-libquadmath --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-armel-cross/jre
--enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-armel-cross
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-armel-cross
--with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--disable-libgcj --enable-objc-gc --enable-multiarch --enable-multilib
--disable-sjlj-exceptions --with-arch=armv5t --with-float=soft --disable-werror
--enable-multilib --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=arm-linux-gnueabi
--program-prefix=arm-linux-gnueabi- --includedir=/usr/arm-linux-gnueabi/include
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4)
$ cat small.c
int printf(const char*, ...);
union {
int a;
} b = {1};
int *c = (int*)&b;
long *d = (long*)&b;
int main() {
*d = 0;
*c = *c | 4;
printf("%d\n", b.a);
}
$ arm-linux-gnueabi-gcc -static -O0 small.c; ./a.out
4
$ arm-linux-gnueabi-gcc -static -O1 small.c; ./a.out
4
$ arm-linux-gnueabi-gcc -static -O2 small.c; ./a.out
5
$ arm-linux-gnueabi-gcc -static -O3 small.c; ./a.out
5
As we can find, the output is inconsistent between optimization -O1 and
-O2/-O3.
>From gcc-bugs-return-583431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 08:26:39 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Wed, 29 Nov 2017 08:26:00 -0000
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--- Comment #30 from Jan Hubicka <hubicka at ucw dot cz> ---
Sorry, with -mno-avx2 I was speaking of the other mt benchmark. There is no
need for gathers
in matrix multiplication...
Honza
>From gcc-bugs-return-583432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 08:30:02 2017
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Subject: [Bug c/83198] [7/8 regression] ICE internal compiler error: in format_floating, at gimple-ssa-sprintf.c:1900
Date: Wed, 29 Nov 2017 08:30:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.3
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Subject: [Bug debug/83199] [8 Regression] FAIL: gdb.base/async.exp & gdb.base/skip.exp
Date: Wed, 29 Nov 2017 08:30:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
Summary|FAIL: gdb.base/async.exp & |[8 Regression] FAIL:
|gdb.base/skip.exp |gdb.base/async.exp &
| |gdb.base/skip.exp
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Are we sure this is not gdbs fault?
>From gcc-bugs-return-583434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 08:31:11 2017
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From: "andrewm.roberts at sky dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
Date: Wed, 29 Nov 2017 08:31:00 -0000
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--- Comment #2 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Correction:
1) This works on gcc 8 snapshot, it doesn't work on gcc-7.2.0
/usr/local/gcc-7.2.0/bin/gcc -march=native -mcpu=cortex-a53 -mfpu=auto -Ofast
-o matrix matrix.c
cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
2) The current message when you do not select a cpu explicitly, could do with
improving to prompt you to do so.
/usr/local/gcc/bin/gcc -march=native -mfpu=auto -o matrix matrix.c
cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
Should really prompt user to use -mcpu= to select a cpu
3) This is the gcc version it doesn't work against, I'll check latest gcc-7
snapshot to check if the gcc-8 fix has been backported.
/usr/local/gcc-7.2.0/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc-7.2.0/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-7.2.0/libexec/gcc/armv7l-unknown-linux-gnueabihf/7.2.0/lto-wrapper
Target: armv7l-unknown-linux-gnueabihf
Configured with: ../gcc-7.2.0/configure --prefix=/usr/local/gcc-7.2.0
--program-suffix= --disable-werror --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-gnu-indirect-function --enable-lto --with-isl
--enable-languages=c,c++,fortran,lto --disable-libgcj --enable-clocale=gnu
--disable-libstdcxx-pch --enable-install-libiberty --disable-multilib
--disable-libssp --enable-default-pie --enable-default-ssp
--host=armv7l-unknown-linux-gnueabihf --build=armv7l-unknown-linux-gnueabihf
--with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --disable-bootstrap
Thread model: posix
gcc version 7.2.0 (GCC)
>From gcc-bugs-return-583435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 08:32:33 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/83201] [7/8 Regression] SPEC CPU2017 505.mcf_f produces incorrect output when built with -flto and FDO
Date: Wed, 29 Nov 2017 08:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target Milestone|--- |7.3
Summary|SPEC CPU2017 505.mcf_f |[7/8 Regression] SPEC
|produces incorrect output |CPU2017 505.mcf_f produces
|when built with -flto and |incorrect output when built
|FDO |with -flto and FDO
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Pat Haugen from comment #2)
> (In reply to Pat Haugen from comment #0)
> >
> > It appears to work fine with r254943. I'll start a bisect and post results.
>
> My bisect showed that r254946 was where it started failing on trunk. And
> yes, it fails with current GCC 7 branch too.
Probably a bogus bisect point, for a few revisions inlining was broken so it's
probably broken a bit earlier as well.
>From gcc-bugs-return-583436-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 08:40:51 2017
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Subject: [Bug target/80819] [6/7/8 regression] Useless store to the stack in _mm_set_epi64x with SSE4 -mno-avx
Date: Wed, 29 Nov 2017 08:40:00 -0000
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 29 08:40:13 2017
New Revision: 255226
URL: https://gcc.gnu.org/viewcvs?rev=255226&root=gcc&view=rev
Log:
PR target/80819
* config/i386/sse.md (vec_concatv2di): Remove * from (=Yr,0,*rm)
alternative.
* gcc.target/i386/pr80819-1.c: New test.
* gcc.target/i386/pr80819-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr80819-1.c
trunk/gcc/testsuite/gcc.target/i386/pr80819-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-583437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:01:24 2017
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Subject: [Bug target/80819] [6/7 regression] Useless store to the stack in _mm_set_epi64x with SSE4 -mno-avx
Date: Wed, 29 Nov 2017 09:01:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7/8 regression] Useless |[6/7 regression] Useless
|store to the stack in |store to the stack in
|_mm_set_epi64x with SSE4 |_mm_set_epi64x with SSE4
|-mno-avx |-mno-avx
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-583438-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:17:04 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Wed, 29 Nov 2017 09:17:00 -0000
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--- Comment #31 from Andrew Roberts <andrewm.roberts at sky dot com> ---
of for mt19937ar with -mno-avx2
/usr/local/gcc/bin/gcc -march=$amarch -mtune=$amtune -mno-avx2 -O3 -o mt199
37ar mt19937ar.c
Top 2:
mt19937ar took 358493 clocks -march=silvermont -mtune=bdver1
mt19937ar took 359933 clocks -march=corei7 -mtune=btver2
Top znver1:
mt19937ar took 363177 clocks -march=znver1 -mtune=k8-sse3
mt19937ar took 373751 clocks -march=slm -mtune=znver1
mt19937ar took 379094 clocks -march=znver1 -mtune=znver1
Worst cases:
mt19937ar took 683339 clocks -march=bdver3 -mtune=btver1
mt19937ar took 687566 clocks -march=btver2 -mtune=haswell
mt19937ar took 695629 clocks -march=athlon64-sse3 -mtune=sandybridge
mt19937ar took 697349 clocks -march=k8-sse3 -mtune=knl
mt19937ar took 697831 clocks -march=knl -mtune=core2
mt19937ar took 798283 clocks -march=opteron -mtune=athlon64-sse3
Running just for: -march=znver1 -mtune=znver1 -Ofast
mt19937ar took 445136 clocks
mt19937ar took 449784 clocks
mt19937ar took 460105 clocks
Running just for: -march=znver1 -mtune=znver1 -mno-avx2 -Ofast
mt19937ar took 416937 clocks
mt19937ar took 389458 clocks
mt19937ar took 389154 clocks
So -mno-avx2 gives 13-14% gain depending on how you look at it.
>From gcc-bugs-return-583439-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:36:48 2017
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Subject: [Bug tree-optimization/83202] Try joining operations on consecutive array elements during tree vectorization
Date: Wed, 29 Nov 2017 09:36:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-29
Blocks| |53947
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
wiht += 4 the inner loop doesn't iterate so it's effectively
void test(double data[4][4])
{
for (int i = 0; i < 4; i++)
{
data[i][i] = data[i][i] * data[i][i];
data[i][i+1] = data[i][i+1] * data[i][i+1];
}
}
we fail to SLP here because we get confused by the computed group size of 5
as there's a gap of three elements between the first stores of each iteration.
When later doing BB vectorization we fail to analyze dependences, likely
because
not analyzing refs as thoroughly as with loops.
For your second example we fail to loop vectorize this because we completely
peel the inner loop in cunrolli, leaving control flow inside the loop...
I have a patch for that one.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
>From gcc-bugs-return-583441-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:39:36 2017
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From: "lh_mouse at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83210] New: __builtin_mul_overflow() generates suboptimal code when exactly one argument is the constant 2
Date: Wed, 29 Nov 2017 09:39:00 -0000
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Bug ID: 83210
Summary: __builtin_mul_overflow() generates suboptimal code
when exactly one argument is the constant 2
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This snippet illustrates the problem:
<https://godbolt.org/g/TssrYv>
```
bool mul_and_check(unsigned *dst, unsigned src){
return __builtin_mul_overflow(src, 2, dst);
}
```
With `g++ -O3`, this compiles to:
```
mul_and_check(unsigned int*, unsigned int):
mov eax, esi
mov edx, 2
xor ecx, ecx
mul edx
mov esi, eax
jo .L5
.L2:
mov eax, ecx
mov DWORD PTR [rdi], esi
and eax, 1
ret
.L5:
mov ecx, 1
jmp .L2
```
This is very suboptimal. GCC could have used a bitwise shift operation instead,
as follows:
```
mul_and_check(unsigned int*, unsigned int):
xor eax, eax # EAX = 0
shl esi, 1 # CF = MSB(src)
# src = src * 2;
rol eax, 1 # EAX = CF
mov dword ptr[rdi], esi # *dst = src
ret
```
>From gcc-bugs-return-583440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:39:16 2017
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83209] New: Failure of allocation of a coarray with a pointer component
Date: Wed, 29 Nov 2017 09:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83209
Bug ID: 83209
Summary: Failure of allocation of a coarray with a pointer
component
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: pault at gcc dot gnu.org
CC: vehre at gmx dot de
Target Milestone: ---
Created attachment 42740
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42740&action=edit
tree dump of failing test
integer, target :: tgt = 45
type :: t
integer, pointer :: i => tgt
end type
type(t), allocatable :: c(:)[:]
allocate(c(10)[*])
deallocate(c)
end
fails with:
[pault@pc30 pr83076]$ ~/irun/bin/gfortran -static-libgfortran test.f90
-fdump-tree-original -O3 -fcoarray=lib -lcaf_single -g
[pault@pc30 pr83076]$ ./a.out
At line 8 of file test.f90
Fortran runtime error: Attempt to DEALLOCATE unallocated 'c'
Error termination. Backtrace:
#0 0x4029f4 in MAIN__
at /home/pault/prs/pr83076/test.f90:8
#1 0x4029f4 in main
at /home/pault/prs/pr83076/test.f90:9
The tree dump is attached.
The version with an allocatable component works as expected.
Paul
>From gcc-bugs-return-583442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:40:31 2017
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Subject: [Bug driver/83207] On ARM -mcpu=native does not detect ARM big/little cpu combinations correctly (armv7l-unknown-linux-gnueabihf)
Date: Wed, 29 Nov 2017 09:40:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-29
CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed. The arm port doesn't know how to detect big.LITTLE combinations in
its native CPU detection logic
>From gcc-bugs-return-583443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:40:58 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83203] [8 Regression] Inefficient int to avx2 vector conversion
Date: Wed, 29 Nov 2017 09:40:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |needs-bisection
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-29
CC| |jakub at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|Inefficient int to avx2 |[8 Regression] Inefficient
|vector conversion |int to avx2 vector
| |conversion
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. On trunk we even genrate
foo:
.LFB5186:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
andq $-32, %rsp
movq %rdi, -8(%rsp)
vmovq -8(%rsp), %xmm1
vmovq %xmm1, %xmm0
vmovdqa %xmm0, %xmm0
leave
huh...
We expand from
foo (long int x)
{
__m256i _2;
<bb 2> [100.00%]:
_2 = {x_1(D)};
return _2;
that's a regression on trunk (gcc7 code confirmed). Probably caused by
the vec_init expansion reorg?
>From gcc-bugs-return-583444-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:46:44 2017
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Subject: [Bug c++/83204] [6/7/8 Regression] c++ -std=c++14 ICE in maybe_undo_parenthesized_ref, at cp/semantics.c:1694
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-583445-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:48:02 2017
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Subject: [Bug target/83208] [arm-linux-gnueabi-gcc] wrong code at optimization level -O2 and -O3 for union assignment
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target| |arm-linux-gnueabi-gcc
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 5 is no longer maintained, can you try GCC 6 or newer?
>From gcc-bugs-return-583446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:50:32 2017
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From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/83199] [8 Regression] FAIL: gdb.base/async.exp & gdb.base/skip.exp
Date: Wed, 29 Nov 2017 09:50:00 -0000
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--- Comment #2 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Are we sure this is not gdbs fault?
GDB version was fixed when I did my bisect. That said, I don't know what sort
of change happened in DWARF so it may well be that the new DWARF is correct but
GDB just cannot deal with it.
>From gcc-bugs-return-583447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:51:54 2017
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Subject: [Bug target/83210] __builtin_mul_overflow() generates suboptimal code when exactly one argument is the constant 2
Date: Wed, 29 Nov 2017 09:51:00 -0000
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--- Comment #1 from Liu Hao <lh_mouse at 126 dot com> ---
FWIW, it can still be improved when the constant is something other than 2.
For example:
```
bool mul_8_and_check(unsigned *dst, unsigned src){
return __builtin_mul_overflow(src, 8, dst);
}
```
can be rewritten as:
bool mul_8_and_check(unsigned *dst, unsigned src){
unsigned res = src << 3;
*dst = res;
return (res >> 3) != src; // The result will have been truncated if
// dividing the result by 8 does not yield
// the original value.
}
```
>From gcc-bugs-return-583448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:52:21 2017
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Subject: [Bug target/83208] [arm-linux-gnueabi-gcc] wrong code at optimization level -O2 and -O3 for union assignment
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The union here does not matter.
You are violating C aliasing rules.
You store via a long and then load via an int. And not through an union.
>From gcc-bugs-return-583449-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:57:12 2017
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Subject: [Bug target/83210] __builtin_mul_overflow() generates suboptimal code when exactly one argument is the constant 2
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(res >> 3) != src;
Why not just (src>>(sizeof (res)*8-3))!=0.
Seems shorter and might be faster.
>From gcc-bugs-return-583450-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:58:29 2017
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Subject: [Bug target/83210] __builtin_mul_overflow() generates suboptimal code when exactly one argument is the constant 2
Date: Wed, 29 Nov 2017 09:58:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> (res >> 3) != src;
>
> Why not just (src>>(sizeof (res)*8-3))!=0.
>
> Seems shorter and might be faster.
And for the original case
Src>>31!=0 Just becomes src>>31. :)
>From gcc-bugs-return-583451-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 09:59:15 2017
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Subject: [Bug target/83208] [arm-linux-gnueabi-gcc] wrong code at optimization level -O2 and -O3 for union assignment
Date: Wed, 29 Nov 2017 09:59:00 -0000
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--- Comment #3 from ktkachov at gcc dot gnu.org ---
The testcase is "fixed" by using -fno-strict-aliasing.
In this example pointers c and d alias each other, they are of incompatible
types and they are both dereferenced, so the testcase has undefined behaviour.
>From gcc-bugs-return-583452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 10:01:46 2017
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From: "jan.kratochvil at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/83199] [8 Regression] FAIL: gdb.base/async.exp & gdb.base/skip.exp
Date: Wed, 29 Nov 2017 10:01:00 -0000
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Jan Kratochvil <jan.kratochvil at redhat dot com> changed:
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----------------------------------------------------------------------------
CC| |jan.kratochvil at redhat dot com
--- Comment #3 from Jan Kratochvil <jan.kratochvil at redhat dot com> ---
Addresses are missing when the function is inlined.
But these testfiles do not use -O optimization so I find wrong if GCC has
inlined anything.
Sorry I have not built trunk GCC (moreover on arm) to check it, maybe submitter
can attach the binary files here?
>From gcc-bugs-return-583454-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 10:02:17 2017
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Subject: [Bug c++/83211] New: Warning: ignoring incorrect section type for .init_array.00200
Date: Wed, 29 Nov 2017 10:02:00 -0000
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Bug ID: 83211
Summary: Warning: ignoring incorrect section type for
.init_array.00200
Product: gcc
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I recently upgraded my embedded ARM Cortex-M4 toolchain from GCC 6.3 to GCC
6.4, and Binutils from 2.28 to 2.29.1 (among other minor component upgrades).
My C++ code is using the following for a static routine:
__attribute__ ((constructor (200)))
After the upgrade I am getting this warning now:
/tmp/cc79zoMV.s: Assembler messages:
/tmp/cc79zoMV.s:5079: Warning: ignoring incorrect section type for
.init_array.00200
/tmp/cc79zoMV.s:5112: Warning: ignoring incorrect section type for
.fini_array.00200
Normally, GCC emits this kind of section statements during compilation:
.section .init_array,"aw",%init_array
But for the "__attribute__ ((constructor (200)))" code, it emits this instead:
.section .init_array.00200,"aw",%progbits
Binutils saw this change recently:
https://sourceware.org/bugzilla/show_bug.cgi?id=21287
So I am guessing that is what is causing the new warning.
I suppose that GCC needs an update to match that Binutils change.
>From gcc-bugs-return-583453-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 10:02:16 2017
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Subject: [Bug target/83210] __builtin_mul_overflow() generates suboptimal code when exactly one argument is the constant 2
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--- Comment #4 from Liu Hao <lh_mouse at 126 dot com> ---
(In reply to Andrew Pinski from comment #2)
> (res >> 3) != src;
>
> Why not just (src>>(sizeof (res)*8-3))!=0.
>
> Seems shorter and might be faster.
What if the second operand is not a power of 2? `(res * 5 / 5 != src)` will
always work, but bitwise shifting might not.
>From gcc-bugs-return-583455-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 10:14:32 2017
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Subject: [Bug debug/83199] [8 Regression] FAIL: gdb.base/async.exp & gdb.base/skip.exp
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The only change has been that with -gcolumn-info which is now the default GCC
emits extra attributes: DW_AT_decl_column and DW_AT_call_column, and emits .loc
with column numbers rather than always hardcoded 0.
>From gcc-bugs-return-583456-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 10:20:51 2017
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Subject: [Bug c/83213] New: peephole bug with -O2
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Bug ID: 83213
Summary: peephole bug with -O2
Product: gcc
Version: 8.0
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Created attachment 42741
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42741&action=edit
gzipped C source code
The attached C code, when compiled by recent gcc trunk and flag -O2,
does this:
zend_vm_execute.h:63744:1: error: No region crossing jump at section boundary
in bb 2545
}
It compiled fine without the -O2 flag.
I'll have a go at finding a range of gcc revisions where
the problem seems to occur and I'll have a go at reducing the code.
I make this the 400th bug I've reported since Oct 2010.
>From gcc-bugs-return-583457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 10:26:19 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83209] [7/8 Regression] Failure of allocation of a coarray with a pointer component
Date: Wed, 29 Nov 2017 10:26:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-29
Known to work| |6.4.0
Target Milestone|--- |7.3
Summary|Failure of allocation of a |[7/8 Regression] Failure of
|coarray with a pointer |allocation of a coarray
|component |with a pointer component
Ever confirmed|0 |1
Known to fail| |7.2.0, 8.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Could be caused by r244196 (pr78781).
>From gcc-bugs-return-583458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 10:32:23 2017
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Subject: [Bug middle-end/80929] [6/7/8 Regression] Division with constant no more optimized to mult highpart
Date: Wed, 29 Nov 2017 10:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80929
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 29 10:31:36 2017
New Revision: 255228
URL: https://gcc.gnu.org/viewcvs?rev=255228&root=gcc&view=rev
Log:
PR middle-end/80929
* rtlanal.c (seq_cost): For non-single_set insns try to use insn_cost.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/rtlanal.c
>From gcc-bugs-return-583459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 10:33:44 2017
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Subject: [Bug middle-end/83185] [8 Regression] ICE with -fsanitizedress in build_simple_mem_ref_loc, at tree.c:4696
Date: Wed, 29 Nov 2017 10:33:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 29 10:33:06 2017
New Revision: 255229
URL: https://gcc.gnu.org/viewcvs?rev=255229&root=gcc&view=rev
Log:
PR middle-end/83185
* tree.c (build_simple_mem_ref_loc): Handle
get_addr_base_and_unit_offset returning a MEM_REF.
* gcc.dg/asan/pr83185.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/asan/pr83185.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.c
>From gcc-bugs-return-583460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 10:42:57 2017
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Subject: [Bug c/83213] peephole bug with -O2
Date: Wed, 29 Nov 2017 10:42:00 -0000
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
Bug seems to occur between revisions 253840 and 253974.
>From gcc-bugs-return-583461-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 10:50:59 2017
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Subject: [Bug target/83210] __builtin_mul_overflow() generates suboptimal code when exactly one argument is the constant 2
Date: Wed, 29 Nov 2017 10:50:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Liu Hao from comment #4)
> (In reply to Andrew Pinski from comment #2)
> > (res >> 3) != src;
> >
> > Why not just (src>>(sizeof (res)*8-3))!=0.
> >
> > Seems shorter and might be faster.
>
> What if the second operand is not a power of 2? `(res * 5 / 5 != src)` will
> always work, but bitwise shifting might not.
Division is something we need to avoid. If any of the * 5 or / 5 ends up being
actual multiplication, it doesn't make sense either. And otherwise it will
just be very long. So the only thing that IMHO makes sense is unsigned
overflow multiply with constant power of two. I can handle that. No plans to
do anything else.
>From gcc-bugs-return-583462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 10:52:57 2017
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Subject: [Bug middle-end/80929] [6/7/8 Regression] Division with constant no more optimized to mult highpart
Date: Wed, 29 Nov 2017 10:52:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
On the trunk the backend can deal with this using a hook. So it is a target
issue if anything else needs solving.
>From gcc-bugs-return-583463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 10:53:15 2017
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Subject: [Bug middle-end/83185] [8 Regression] ICE with -fsanitizedress in build_simple_mem_ref_loc, at tree.c:4696
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-583464-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 11:05:44 2017
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Subject: [Bug gcov-profile/83214] New: [8 regression] FAIL: g++.dg/gcov/gcov-8.C -std=gnu++11 gcov failed
Date: Wed, 29 Nov 2017 11:05:00 -0000
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Bug ID: 83214
Summary: [8 regression] FAIL: g++.dg/gcov/gcov-8.C
-std=gnu++11 gcov failed
Product: gcc
Version: 8.0
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CC: marxin at gcc dot gnu.org
Target Milestone: ---
On arm-none-linux-gnueabihf:
FAIL: g++.dg/gcov/gcov-8.C -std=gnu++11 gcov failed
FAIL: g++.dg/gcov/gcov-8.C -std=gnu++14 gcov failed
FAIL: g++.dg/gcov/gcov-8.C -std=gnu++98 gcov failed
Failing at least from r255140
>From gcc-bugs-return-583465-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 11:05:52 2017
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Subject: [Bug middle-end/83185] [8 Regression] ICE with -fsanitizedress in build_simple_mem_ref_loc, at tree.c:4696
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r250031 btw.
>From gcc-bugs-return-583467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 11:12:49 2017
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
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--- Comment #3 from Andrew Roberts <andrewm.roberts at sky dot com> ---
ok confirmed, this bug is still present on the gcc-7 branch, with the current
snapshot:
/usr/local/gcc-7.2.1/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc-7.2.1/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-7.2.1/bin/../libexec/gcc/armv7l-unknown-linux-gnueabihf/7.2.1/lto-wrapper
Target: armv7l-unknown-linux-gnueabihf
Configured with: ../gcc-7.3.0/configure --prefix=/usr/local/gcc-7.3.0
--program-suffix= --disable-werror --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-gnu-indirect-function --enable-lto --with-isl
--enable-languages=c,c++,fortran,lto --disable-libgcj --enable-clocale=gnu
--disable-libstdcxx-pch --enable-install-libiberty --disable-multilib
--disable-libssp --enable-default-pie --enable-default-ssp
--host=armv7l-unknown-linux-gnueabihf --build=armv7l-unknown-linux-gnueabihf
--with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --disable-bootstrap
Thread model: posix
gcc version 7.2.1 20171123 (GCC)
/usr/local/gcc-7.2.1/bin/gcc -march=native -mcpu=cortex-a53 -mfpu=auto -Ofast
-o matrix matrix.c
cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
Also the gcc man pages for 7.2.1 lack documentation for the -mfpu=auto option,
although it is accepted as an argument (gcc 8 does document it)
On 7.2.1 man page:
-mfpu=name
This specifies what floating-point hardware (or hardware emulation)
is available on the target. Permissible names are: vfpv2, vfpv3,
vfpv3-fp16, vfpv3-d16, vfpv3-d16-fp16, vfpv3xd, vfpv3xd-fp16,
neon-vfpv3, neon-fp16, vfpv4, vfpv4-d16, fpv4-sp-d16, neon-vfpv4,
fpv5-d16, fpv5-sp-d16, fp-armv8, neon-fp-armv8 and
crypto-neon-fp-armv8. Note that neon is an alias for neon-vfpv3
and vfp is an alias for vfpv2.
On 8.0.0 man page:
-mfpu=name
This specifies what floating-point hardware (or hardware emulation)
is available on the target. Permissible names are: auto, vfpv2,
vfpv3, vfpv3-fp16, vfpv3-d16, vfpv3-d16-fp16, vfpv3xd,
vfpv3xd-fp16, neon-vfpv3, neon-fp16, vfpv4, vfpv4-d16, fpv4-sp-d16,
neon-vfpv4, fpv5-d16, fpv5-sp-d16, fp-armv8, neon-fp-armv8 and
crypto-neon-fp-armv8. Note that neon is an alias for neon-vfpv3
and vfp is an alias for vfpv2.
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Subject: [Bug tree-optimization/83202] Try joining operations on consecutive array elements during tree vectorization
Date: Wed, 29 Nov 2017 11:12:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
For the other case the issue is I think that the SLP instance group size is not
the number of scalar stmts but somehow set to the group-size. Changing that
has quite some ripple-down effects though.
-> GCC 9.
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
Date: Wed, 29 Nov 2017 11:38:00 -0000
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Version|8.0 |7.2.1
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Implementation of -mfpu=auto wasn't complete in GCC-7, which is why it isn't in
the main documentation. Some of the implementation was there though, which is
why it leaks into the --help information.
As you've noted it's fixed in gcc-8.
It's unlikely that this will be fixed on the release branch.
>From gcc-bugs-return-583469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 11:51:55 2017
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Subject: [Bug debug/83199] [8 Regression] FAIL: gdb.base/async.exp & gdb.base/skip.exp
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--- Comment #5 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Created attachment 42742
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42742&action=edit
Executable async and skip produced by GCC trunk
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Subject: [Bug gcov-profile/83214] [8 regression] FAIL: g++.dg/gcov/gcov-8.C -std=gnu++11 gcov failed
Date: Wed, 29 Nov 2017 12:44:00 -0000
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--- Comment #1 from Sudakshina Das <sudi.das at arm dot com> ---
Sorry I am bit confused with this. Not failing anymore on my bootstrapped build
from trunk this morning!
>From gcc-bugs-return-583471-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 12:57:28 2017
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Subject: [Bug target/80881] [7/8 Regression] null pointer access in libgomp.h
Date: Wed, 29 Nov 2017 12:57:00 -0000
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--- Comment #8 from Liu Hao <lh_mouse at 126 dot com> ---
I cannot reproduce this problem on either i686-w64-mingw32 or
x86_64-w64-mingw32 with --enable-tls.
On line 677 in libgomp.h there is a call to `gomp_thread()` which is supposed
to return a pointer to a __thread object. However, from your first post, it is
weird that for i686 GCC generates code referring the GS segment register, since
GS is unused by x86 Windows.
On x86 Windows, TLS is indirected from the FS register. It is Microsoft's
rocket science, hence GCC still relies on the emutls solution. The GS register
is known to be utilized by x64 Windows and Linux AFAICT.
I presume that your GCC generated Linux code for Windows targets. If you are
cross-compiling for example it may becaused by GCC scripts mistaking the host
for the build. This still requires investigation.
Reference: <https://en.wikipedia.org/wiki/Win32_Thread_Information_Block>
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Subject: [Bug c++/83205] ICE on structured binding with ill-formed negative std::tuple_size<T>::value
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-29
Ever confirmed|0 |1
Known to fail| |7.2.0, 8.0
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Subject: [Bug c++/83187] [8 regression] internal compiler error: in get_alias_set, at alias.c:923
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--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Wed Nov 29 13:22:44 2017
New Revision: 255231
URL: https://gcc.gnu.org/viewcvs?rev=255231&root=gcc&view=rev
Log:
[PATCH] complex type canonicalization
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg02453.html
PR c++/83817
* tree.c (build_complex_type): Fix canonicalization. Only fill in
type if it is new.
PR c++/83187
* g++.dg/opt/pr83187.C: New.
Added:
trunk/gcc/testsuite/g++.dg/opt/pr83187.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.c
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Subject: [Bug c++/83187] [8 regression] internal compiler error: in get_alias_set, at alias.c:923
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
fixed r255231.
>From gcc-bugs-return-583475-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 13:39:59 2017
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Subject: [Bug gcov-profile/83214] [8 regression] FAIL: g++.dg/gcov/gcov-8.C -std=gnu++11 gcov failed
Date: Wed, 29 Nov 2017 13:39:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Thus fixed/worksforme.
>From gcc-bugs-return-583476-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 13:41:18 2017
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Subject: [Bug rtl-optimization/83213] [8 Regression] peephole bug with -O2
Date: Wed, 29 Nov 2017 13:41:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Target| |x86_64-*-*, i?86-*-*
Component|c |rtl-optimization
Target Milestone|--- |8.0
Summary|peephole bug with -O2 |[8 Regression] peephole bug
| |with -O2
>From gcc-bugs-return-583477-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 13:54:15 2017
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Subject: [Bug middle-end/83215] New: C++: struct with char-array assumed to alias with everything
Date: Wed, 29 Nov 2017 13:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83215
Bug ID: 83215
Summary: C++: struct with char-array assumed to alias with
everything
Product: gcc
Version: 8.0
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Severity: normal
Priority: P3
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TBAA seems to be more conservative for C++ in the following example since GCC
7:
struct mytest {
float a;
#ifdef WITH_BUFFER
char buf[256];
#endif
};
int foo(mytest *m, int *i) {
int tmp = *i; // first load
m->a = 10.0f;
return tmp + *i; // second load since GCC 7
}
Since GCC 7 this code generates two loads with -DWITH_BUFFER, without buf in
the struct there is just one load. buf isn't touched at all in this function.
This only affects C++-code, not the C-frontend.
TYPE_TYPLESS_STORAGE is set for this struct, aggregates with this flag set are
assumed to alias with everything in gcc/alias.c(get_alias_set).
Seems to be introduced with revision 246866
(https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=246866).
>From gcc-bugs-return-583478-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 13:55:03 2017
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Subject: [Bug tree-optimization/83202] Try joining operations on consecutive array elements during tree vectorization
Date: Wed, 29 Nov 2017 13:55:00 -0000
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--- Comment #4 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
One more case. Code has to process diagonal half of matrix and uses SSE
intrinsics - see test1() below. When n is constant like in test2() below, gcc
unrolls loops. However more more transform could be performed, replace pairs of
SSE instructions with one AVX one.
#include <stdint.h>
#include "immintrin.h"
void test1(double data[100][100], unsigned int n)
{
for (int i = 0; i < n; i++)
{
for (int j = 0; j < i; j += 2)
{
__m128d v = _mm_loadu_pd(&data[i][j]);
v = _mm_mul_pd(v, v);
_mm_storeu_pd(&data[i][j], v);
}
}
}
void test2(double data[100][100])
{
const unsigned int n = 6;
for (int i = 0; i < n; i++)
{
for (int j = 0; j < i; j += 2)
{
__m128d v = _mm_loadu_pd(&data[i][j]);
v = _mm_mul_pd(v, v);
_mm_storeu_pd(&data[i][j], v);
}
}
}
>From gcc-bugs-return-583479-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 14:01:17 2017
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Subject: [Bug c++/83205] ICE on structured binding with ill-formed negative std::tuple_size<T>::value
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
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>From gcc-bugs-return-583480-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 14:14:09 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82605] [PDT] ICE in insert_parameter_exprs, at fortran/decl.c:3154
Date: Wed, 29 Nov 2017 14:14:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 42743
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42743&action=edit
A fix for the problem
With the attached patch, now produces the error:
[pault@pc30 pr82605]$ ~/irun/bin/gfortran -static-libgfortran pr*.f90
-fdump-tree-original
pr82065.f90:7:21:
type(t(8, :)) :: x
1
Error: The object ‘x’ at (1) has a deferred LEN parameter ‘b’ and is neither
allocatable nor a pointer
Giving x either attribute allows compilation and correct execution. (I assume
that x%a, being a KIND parameter, is OK in a KIND specification?
With the tweak to pdt_4.f03, it bootstraps and regtests OK.
Paul
>From gcc-bugs-return-583481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 14:15:46 2017
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Subject: [Bug middle-end/83215] C++: struct with char-array assumed to alias with everything
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
What I've wondered here is because we know the offset and size of the m->a
access, even when the containing structure is TYPE_TYPELESS_STORAGE, we could
prove that this offset/size in the structure doesn't and can't overlap with any
area of the aggregate that has or could have TYPE_TYPELESS_STORAGE array, and
ignore the TYPE_TYPELESS_STORAGE for that access.
>From gcc-bugs-return-583482-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 14:29:41 2017
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Subject: [Bug c++/83205] ICE on structured binding with ill-formed negative std::tuple_size<T>::value
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42744
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gcc8-pr83205.patch
Untested fix.
>From gcc-bugs-return-583483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 14:38:44 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83202] Try joining operations on consecutive array elements during tree vectorization
Date: Wed, 29 Nov 2017 14:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83202
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 29 14:38:06 2017
New Revision: 255233
URL: https://gcc.gnu.org/viewcvs?rev=255233&root=gcc&view=rev
Log:
2017-11-29 Richard Biener <rguenther@suse.de>
PR tree-optimization/83202
* tree-vect-slp.c (scalar_stmts_set_t): New typedef.
(bst_fail): Use it.
(vect_analyze_slp_cost_1): Add visited set, do not account SLP
nodes vectorized to the same stmts multiple times.
(vect_analyze_slp_cost): Allocate a visited set and pass it down.
(vect_analyze_slp_instance): Adjust.
(scalar_stmts_to_slp_tree_map_t): New typedef.
(vect_schedule_slp_instance): Add a map recording the SLP node
representing the vectorized stmts for a set of scalar stmts.
Avoid code-generating redundancies.
(vect_schedule_slp): Allocate map and pass it down.
* gcc.dg/vect/costmodel/x86_64/costmodel-pr83202.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/vect/costmodel/x86_64/costmodel-pr83202.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-slp.c
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Subject: [Bug tree-optimization/83202] Try joining operations on consecutive array elements during tree vectorization
Date: Wed, 29 Nov 2017 14:42:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
There are multiple issues reflected in this bug. The last commit addressed the
SLP cost model thing (not fixing any testcase on its own).
>From gcc-bugs-return-583485-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 14:51:29 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83202] Try joining operations on consecutive array elements during tree vectorization
Date: Wed, 29 Nov 2017 14:51:00 -0000
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--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 29 Nov 2017, bugzilla@poradnik-webmastera.com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83202
>
> --- Comment #4 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
> One more case. Code has to process diagonal half of matrix and uses SSE
> intrinsics - see test1() below. When n is constant like in test2() below, gcc
> unrolls loops. However more more transform could be performed, replace pairs of
> SSE instructions with one AVX one.
GCC currently does not "vectorize" already vectorized code so
this is a much farther away "goal" apart from eventually pattern-matching
some very simple cases.
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Subject: [Bug rtl-optimization/83213] [8 Regression] peephole bug with -O2
Date: Wed, 29 Nov 2017 15:13:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is weird, because already e.g. r250000 ICEs with:
internal compiler error: in to_reg_br_prob_base, at profile-count.h:189
and so does r253842.
It is true that r253974 ICEs differently, as you wrote.
>From gcc-bugs-return-583487-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 15:13:33 2017
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Subject: [Bug tree-optimization/83216] New: [8 regression] FAIL: gcc.dg/graphite/interchange-3.c
Date: Wed, 29 Nov 2017 15:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83216
Bug ID: 83216
Summary: [8 regression] FAIL: gcc.dg/graphite/interchange-3.c
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: thopre01 at gcc dot gnu.org
Target Milestone: ---
Target: arm-none-eabi
Hi,
The following tests started to fail on arm-none-eabi targets after commit
r253809:
PASS->FAIL: gcc.dg/graphite/interchange-3.c scan-tree-dump graphite "tiled"
PASS->FAIL: gcc.dg/graphite/interchange-7.c scan-tree-dump graphite "tiled"
PASS->FAIL: gcc.dg/graphite/interchange-9.c scan-tree-dump graphite "tiled"
PASS->FAIL: gcc.dg/graphite/uns-interchange-9.c scan-tree-dump graphite "tiled"
GCC was configured with:
--target=arm-none-eabi --with-newlib --with-mode=thumb --with-cpu=cortex-m3
Failure can be observed when targeting Arm Cortex-M0, Cortex-M3, Cortex-M4 and
Cortex-M7 at least.
Best regards.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83073] Range for VR_VARYING | [1, 1]
Date: Wed, 29 Nov 2017 15:15:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
So for VARYING | 1 we go using the may_be_nonzero stuff in
else if (code == BIT_IOR_EXPR)
{
max = wide_int_to_tree (expr_type,
may_be_nonzero0 | may_be_nonzero1);
wide_int wmin = must_be_nonzero0 | must_be_nonzero1;
/* If the input ranges contain only positive values we can
truncate the minimum of the result range to the maximum
of the input range minima. */
if (int_cst_range0 && int_cst_range1
&& tree_int_cst_sgn (vr0.min) >= 0
&& tree_int_cst_sgn (vr1.min) >= 0)
{
wmin = wi::max (wmin, wi::to_wide (vr0.min),
TYPE_SIGN (expr_type));
wmin = wi::max (wmin, wi::to_wide (vr1.min),
TYPE_SIGN (expr_type));
}
/* If either input range contains only negative values
we can truncate the minimum of the result range to the
respective minimum range. */
if (int_cst_range0 && tree_int_cst_sgn (vr0.max) < 0)
wmin = wi::max (wmin, wi::to_wide (vr0.min),
TYPE_SIGN (expr_type));
if (int_cst_range1 && tree_int_cst_sgn (vr1.max) < 0)
wmin = wi::max (wmin, wi::to_wide (vr1.min),
TYPE_SIGN (expr_type));
min = wide_int_to_tree (expr_type, wmin);
but for [MIN, MAX] we go
/* For op & or | attempt to optimize:
[x, y] op z into [x op z, y op z]
if z is a constant which (for op | its bitwise not) has n
consecutive least significant bits cleared followed by m 1
consecutive bits set immediately above it and either
m + n == precision, or (x >> (m + n)) == (y >> (m + n)).
The least significant n bits of all the values in the range are
cleared or set, the m bits above it are preserved and any bits
above these are required to be the same for all values in the
range. */
if (vr0p && range_int_cst_p (vr0p))
{
wide_int w = wi::to_wide (vr1p->min);
int m = 0, n = 0;
if (code == BIT_IOR_EXPR)
w = ~w;
if (wi::eq_p (w, 0))
...
and both cases produce a different outcome (as we see).
I don't see how we can do better. Well, we can choose to handle
| CST with least significant bit set as ~[0, 0] consistently. Or
we can add a predicate effectively_varying_p () and guard the 2nd case
above with it.
The "proper" result for [MIN,MAX] | 1 is of course a set of every odd number...
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From: "mgulick at mathworks dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/83173] C preprocessor generates incorrect linemarkers
Date: Wed, 29 Nov 2017 15:20:00 -0000
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--- Comment #2 from Mike Gulick <mgulick at mathworks dot com> ---
I have made some progress in determining the cause of this bug. This issue
occurs when the current source_location is > LINE_MAP_MAX_LOCATION_WITH_COLS
and when a #include is the last line in the file (with a terminating newline).
The corruption occurs when _cpp_stack_include decrements
ptable->line_table->highest_location. It does this so that highest_location
refers to the *current* line in the file, not the next line. For the case
where a #include is *not* the last line in the file, this works correctly.
However when the the source location is > LINE_MAP_MAX_LOCATION_WITH_COLS and
the current #include line being processed is the last line in the file, the
highest_location value already refers to the current line in the file, as there
is no next line. Thus this decrement sets highest_location to the previous
line in the file, which causes the corruption.
Consider an include file with two #includes:
#include "foo.h"
#include "bar.h"
EOF
Consider when do_include_common() processes the final '#include "bar.h"'. This
initially calls parse_include(). This calls check_eol(), which eventually
calls _cpp_lex_direct() via the following call stack:
0 _cpp_lex_direct
1 _cpp_lex_token
2 cpp_get_token_1
3 cpp_get_token
4 check_eol_1
5 check_eol
6 parse_include
7 do_include_common
8 do_include
9 _cpp_handle_directive
10 _cpp_lex_token
11 cpp_get_token_1
12 cpp_get_token_with_location
13 scan_translation_unit
14 preprocess_file
_cpp_lex_direct parses the current buffer one character at a time. In the case
of the line "#include bar.h", the buffer looks like:
#include "bar.h"\n\n
Note that the second '\n' is added to the buffer when the file is initially
read in. It doesn't exist in the file.
After parsing the '#include "bar.h", the buffer is sitting at the first '\n'.
#include "bar.h"\n\n
^ ^
buffer.cur---/ |
|
buffer.rlimit--/
buffer.rlimit is a pointer to the end of the buffer. It points to the final
newline that was added to the end of the buffer when the file was read.
_cpp_lex_direct() reads the buffer one character at a time, e.g.
c = *buffer->cur++
...
switch (c)
{
...
case '\n':
if (buffer->cur < buffer->rlimit)
CPP_INCREMENT_LINE (pfile, 0)
buffer->need_line = true;
goto fresh_line;
...
Under normal circumstances (i.e. if the #include is *not* the last line in the
file), when the '\n' is detected, CPP_INCREMENT_LINE increments the
line_maps->highest_line. However for this last #include, buffer->cur ==
buffer->rlimit, so CPP_INCREMENT_LINE is not called.
Thus if the #include token has source_location 1610612807, highest_location in
the line_maps structure also has 1610612807. Remember that we are past
LINE_MAP_MAX_LOCATION_WITH_COLS, so column numbers are not tracked, thus each
increment of a source_location value refers to a new line number and
potentially a new source file.
Continue stepping through do_include_common to _cpp_stack_include. This
function has the following comment:
/* Compensate for the increment in linemap_add that occurs if
_cpp_stack_file actually stacks the file. In the case of a
normal #include, we're currently at the start of the line
*following* the #include. A separate source_location for this
location makes no sense (until we do the LC_LEAVE), and
complicates LAST_SOURCE_LINE_LOCATION. This does not apply if we
found a PCH file (in which case linemap_add is not called) or we
were included from the command-line. */
Under normal circumstances, the comment stating "we're currently at the start
of the line *following* the include is correct. However in this case, this is
not true because we did not increment highest_line, thus highest_location still
refers to the current line. Thus when we decrement highest_line, this makes
highest_line actually refer to the *previous* line map location, not the
current. _cpp_stack_file then ultimately calls linemap_add, which sets
start_location to highest_location + 1. This is assumed to be a new, unused
location, but in this case it actually already refers to an existing line map.
Note that the linemap_assert in linemap_add will not catch this even if linemap
assertions are enabled. This is because it only asserts if the new
start_location is less than the source_location of last line in the line map,
however in this case it is equal to the source_location of the last line.
We fix this by no longer decrementing pfile->line_table->highest_location if it
is less than or equal to the source_location of the current include header.
The purpose of this decrement is to ensure that
pfile->line_table->highest_location still refers to the current line, so if it
already refers to the current line, there is no need to decrement it (and doing
so would be wrong).
Simple approach: This avoids decrementing highest_location when loc >
LINE_MAP_MAX_LOCATION_WITH_COLS:
if (file->pchname == NULL && file->err_no == 0
&& type != IT_CMDLINE && type != IT_DEFAULT
&& pfile->line_table->highest_location > loc)
pfile->line_table->highest_location--;
More complicated: I tried to account for the case when loc <=
LINE_MAP_MAX_LOCATION_WITH_COLS. In this case, CPP_INCREMENT_LINE is still not
called in _cpp_lex_direct when the current #include is the last line in the
file. So we compute the end of the current location and check if
highest_location is past that.
if (file->pchname == NULL && file->err_no == 0
&& type != IT_CMDLINE && type != IT_DEFAULT)
{
line_map_ordinary * last_ord =
LINEMAPS_LAST_ORDINARY_MAP(pfile->line_table);
source_location last_map_end = last_ord->start_location +
((1 << last_ord->m_column_and_range_bits) - 1);
if (pfile->line_table->highest_location > last_map_end)
pfile->line_table->highest_location--;
}
This seems to work, and I did not see any concerning failures in the existing
test suite. I have two concerns about this latter approach:
1) I'm not familiar or comfortable with the corner cases of CPP_INCREMENT_LINE
to know if I'm computing the end of the map correctly.
2) I'm using LINEMAPS_LAST_ORDINARY_MAP instead of loc (the source_location of
the include being processed). It seems like I should be comparing
highest_location to some form of the current loc instead, as the point it to
make sure that highest_location refers to the current source line.
>From gcc-bugs-return-583490-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 15:24:46 2017
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Subject: [Bug middle-end/83215] C++: struct with char-array assumed to alias with everything
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CC| |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The key here is that "mytest" has alias-set zero. It has that because
aggregate copying of it has to transfer whatever is in 'buf'. But if "mytest"
has alias-set zero that means any component of it has that as well.
So this correctness fix is really tied to how we need to handle aggregate
copying
of structs.
I don't like that (and I simply blame the C++ standards commitee). It's a
really bad choice for optimization.
Note making the C++ FE do sth "special" for aggregate copying works only
sofar as the middle-end also sometimes generates such copying (argument
copying during inlining, etc).
>From gcc-bugs-return-583491-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 15:27:29 2017
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Subject: [Bug tree-optimization/83216] [8 regression] FAIL: gcc.dg/graphite/interchange-3.c
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |8.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note the testcases are not really testing anything (just the dump scanning...).
Well - let me have a very quick look.
>From gcc-bugs-return-583492-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 15:31:47 2017
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Subject: [Bug tree-optimization/83216] [8 regression] FAIL: gcc.dg/graphite/interchange-3.c
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can't reproduce
What ISL version are you using?
>From gcc-bugs-return-583493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 15:35:22 2017
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Subject: [Bug tree-optimization/83216] [8 regression] FAIL: gcc.dg/graphite/interchange-3.c
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--- Comment #3 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> Can't reproduce
>
> What ISL version are you using?
ISL 0.15.
Also my apologies but I haven't tried on Arm Cortex-M7 yet actually, typed it
in as a force of habit.
Best regards.
>From gcc-bugs-return-583494-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 15:36:27 2017
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Subject: [Bug tree-optimization/83216] [8 regression] FAIL: gcc.dg/graphite/interchange-3.c
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
For x86_64-pc-linux-gnu I see
FAIL: gcc.dg/stack-layout-dynamic-1.c scan-assembler-not cfi_def_cfa_register
FAIL: gcc.dg/graphite/interchange-3.c scan-tree-dump graphite "tiled"
FAIL: gcc.dg/graphite/interchange-7.c scan-tree-dump graphite "tiled"
FAIL: gcc.dg/graphite/interchange-9.c scan-tree-dump graphite "tiled"
FAIL: gcc.dg/graphite/uns-interchange-9.c scan-tree-dump graphite "tiled"
at https://gcc.gnu.org/ml/gcc-testresults/2017-11/msg02353.html.
>From gcc-bugs-return-583495-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 15:43:09 2017
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Subject: [Bug tree-optimization/83073] Range for VR_VARYING | [1, 1]
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> The "proper" result for [MIN,MAX] | 1 is of course a set of every odd
> number...
Sadly, while we track may-be-nonzero bits in CCP (maybe with the VRP reorg
there will be a chance to merge it somehow?), we do not track must-be-nonzero
bits.
Note that the original testcase is completely artificial. I needed something
known to be nonzero, and at the time x|1 worked so I used that, but it should
not be used as if it was an important real-world code that heuristics need to
be tuned for.
>From gcc-bugs-return-583496-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 16:33:38 2017
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Subject: [Bug tree-optimization/83216] [8 regression] FAIL: gcc.dg/graphite/interchange-3.c
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--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On November 29, 2017 4:35:12 PM GMT+01:00, "thopre01 at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83216
>
>--- Comment #3 from Thomas Preud'homme <thopre01 at gcc dot gnu.org>
>---
>(In reply to Richard Biener from comment #2)
>> Can't reproduce
>>
>> What ISL version are you using?
>
>ISL 0.15.
That's outdated. Can you try 0.18?
Richard.
>Also my apologies but I haven't tried on Arm Cortex-M7 yet actually,
>typed it
>in as a force of habit.
>
>Best regards.
>From gcc-bugs-return-583497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 16:52:57 2017
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80881
--- Comment #9 from Daniel Starke <daniel.f.starke at freenet dot de> ---
This was a native build.
I have added the GCC build in question to
https://sourceforge.net/projects/gcc-win64/files/7.1.0/gcc-7.1.0-debug-broken-tls.7z
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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/83131] c-c++/common/attr-nonstring-3 failure for strcmp tests on PowerPC
Date: Wed, 29 Nov 2017 16:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83131
--- Comment #2 from seurer at gcc dot gnu.org ---
The new test case was added in r255031.
Here are the warnings it is complaining about:
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -Wc++-compat -O2
-Wattributes -Wstringop-overflow -ftrack-macro-expansion=0 -S -o
attr-nonstring-3.s
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_printf':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:71:3:
warning: 'printf' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:74:3:
warning: 'printf' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:77:3:
warning: 'printf' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_puts':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:84:3:
warning: 'puts' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:87:3:
warning: 'puts' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:90:3:
warning: 'puts' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_snprintf':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:97:3:
warning: 'snprintf' argument 3 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:100:3:
warning: 'snprintf' argument 3 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:103:3:
warning: 'snprintf' argument 3 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_sprintf':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:110:3:
warning: 'sprintf' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:113:3:
warning: 'sprintf' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:116:3:
warning: 'sprintf' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_vsnprintf':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:123:3:
warning: 'vsnprintf' argument 3 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:126:3:
warning: 'vsnprintf' argument 3 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:129:3:
warning: 'vsnprintf' argument 3 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_vsprintf':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:136:3:
warning: 'vsprintf' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:139:3:
warning: 'vsprintf' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:142:3:
warning: 'vsprintf' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_stpcpy':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:203:3:
warning: 'stpcpy' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:207:3:
warning: 'stpcpy' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:210:3:
warning: 'stpcpy' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_stpncpy_warn':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:249:3:
warning: 'stpncpy' argument 2 declared attribute 'nonstring' is smaller than
the specified bound 5 [-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:250:3:
warning: 'stpncpy' writing 5 bytes into a region of size 4 overflows the
destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:256:3:
warning: 'stpncpy' argument 2 declared attribute 'nonstring' is smaller than
the specified bound 5 [-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:257:3:
warning: 'stpncpy' writing 5 bytes into a region of size 4 overflows the
destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_strcat':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:265:3:
warning: 'strcat' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:269:3:
warning: 'strcat' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:272:3:
warning: 'strcat' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_strncat':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:281:3:
warning: 'strncat' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:285:3:
warning: 'strncat' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:288:3:
warning: 'strncat' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_strcpy':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:297:3:
warning: 'strcpy' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:301:3:
warning: 'strcpy' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:304:3:
warning: 'strcpy' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_strchr':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:329:3:
warning: 'strchr' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:332:3:
warning: 'strchr' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:335:3:
warning: 'strchr' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_strdup':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:342:3:
warning: 'strdup' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:345:3:
warning: 'strdup' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:348:3:
warning: 'strdup' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_stnrdup_warn':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:379:3:
warning: 'strndup' argument 1 declared attribute 'nonstring' is smaller than
the specified bound 5 [-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:381:3:
warning: 'strndup' argument 1 declared attribute 'nonstring' is smaller than
the specified bound 5 [-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_strlen':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:389:3:
warning: 'strlen' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:392:3:
warning: 'strlen' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:395:3:
warning: 'strlen' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:397:3:
warning: 'strlen' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:386:46:
note: argument 's' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:406:5:
warning: 'strlen' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:404:10:
note: argument 'a' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:421:5:
warning: 'strlen' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:417:11:
note: argument 'p' declared here
output is:
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_printf':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:71:3:
warning: 'printf' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:74:3:
warning: 'printf' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:77:3:
warning: 'printf' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_puts':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:84:3:
warning: 'puts' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:87:3:
warning: 'puts' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:90:3:
warning: 'puts' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_snprintf':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:97:3:
warning: 'snprintf' argument 3 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:100:3:
warning: 'snprintf' argument 3 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:103:3:
warning: 'snprintf' argument 3 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_sprintf':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:110:3:
warning: 'sprintf' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:113:3:
warning: 'sprintf' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:116:3:
warning: 'sprintf' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_vsnprintf':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:123:3:
warning: 'vsnprintf' argument 3 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:126:3:
warning: 'vsnprintf' argument 3 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:129:3:
warning: 'vsnprintf' argument 3 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_vsprintf':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:136:3:
warning: 'vsprintf' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:139:3:
warning: 'vsprintf' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:142:3:
warning: 'vsprintf' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_stpcpy':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:203:3:
warning: 'stpcpy' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:207:3:
warning: 'stpcpy' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:210:3:
warning: 'stpcpy' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_stpncpy_warn':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:249:3:
warning: 'stpncpy' argument 2 declared attribute 'nonstring' is smaller than
the specified bound 5 [-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:250:3:
warning: 'stpncpy' writing 5 bytes into a region of size 4 overflows the
destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:256:3:
warning: 'stpncpy' argument 2 declared attribute 'nonstring' is smaller than
the specified bound 5 [-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:257:3:
warning: 'stpncpy' writing 5 bytes into a region of size 4 overflows the
destination [-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_strcat':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:265:3:
warning: 'strcat' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:269:3:
warning: 'strcat' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:272:3:
warning: 'strcat' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_strncat':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:281:3:
warning: 'strncat' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:285:3:
warning: 'strncat' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:288:3:
warning: 'strncat' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_strcpy':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:297:3:
warning: 'strcpy' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:301:3:
warning: 'strcpy' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:304:3:
warning: 'strcpy' argument 2 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_strchr':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:329:3:
warning: 'strchr' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:332:3:
warning: 'strchr' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:335:3:
warning: 'strchr' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_strdup':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:342:3:
warning: 'strdup' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:345:3:
warning: 'strdup' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:348:3:
warning: 'strdup' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_stnrdup_warn':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:379:3:
warning: 'strndup' argument 1 declared attribute 'nonstring' is smaller than
the specified bound 5 [-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:381:3:
warning: 'strndup' argument 1 declared attribute 'nonstring' is smaller than
the specified bound 5 [-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c: In
function 'test_strlen':
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:389:3:
warning: 'strlen' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:51:6:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:392:3:
warning: 'strlen' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:54:7:
note: argument 'parr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:395:3:
warning: 'strlen' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:59:8:
note: argument 'arr' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:397:3:
warning: 'strlen' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:386:46:
note: argument 's' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:406:5:
warning: 'strlen' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:404:10:
note: argument 'a' declared here
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:421:5:
warning: 'strlen' argument 1 declared attribute 'nonstring'
[-Wstringop-overflow=]
/home/seurer/gcc/gcc-test/gcc/testsuite/c-c++-common/attr-nonstring-3.c:417:11:
note: argument 'p' declared here
>From gcc-bugs-return-583499-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 16:56:38 2017
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Subject: [Bug c++/82760] Incorrect code generated for aligned new
Date: Wed, 29 Nov 2017 16:56:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |jason at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
>From gcc-bugs-return-583501-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 17:01:30 2017
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Subject: [Bug target/83210] __builtin_mul_overflow() generates suboptimal code when exactly one argument is the constant 2
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42745
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42745&action=edit
gcc8-pr83210.patch
Untested patch.
>From gcc-bugs-return-583500-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 17:01:13 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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--- Comment #32 from Andrew Roberts <andrewm.roberts at sky dot com> ---
For what its worth, here's what the latest and greatest from the competition
has to offer:
/usr/local/llvm-5.0.1-rc2/bin/clang -march=znver1 -mtune=znver1 -O3 matrix.c -o
matrix
mult took 887141 clocks
/usr/local/llvm-5.0.1-rc2/biznver1 -O3 mt19937ar.c -o mt19937ar
mt19937ar took 402282 clocks
/usr/local/llvm-5.0.1-rc2/bin/clang -march=znver1 -mtune=znver1 -Ofast matrix.c
-o matrix
mult took 760913 clocks
/usr/local/llvm-5.0.1-rc2/bin/clang -march=znver1 -mtune=znver1 -Ofast
mt19937ar.c -o mt19937ar
mt19937ar took 392527 clocks
current gcc-8 snapshot:
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -Ofast matrix.c -o matrix
mult took 364775 clocks
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -Ofast -o mt19937ar
mt19937ar.c
mt19937ar took 430804 clocks
current gcc-8 snapshot + extra opts to improve znver1 performance
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -mprefer-vector-width=none
-mno-fma -Ofast matrix.c -o matrix
mult took 130329 clocks
/usr/local/gcc/bin/gcc -march=znver1 -mtune=znver1 -mno-avx2 -Ofast -o
mt19937ar mt19937ar.c
mt19937ar took 387728 clocks
So gcc loses on mt19937ar.c without -mno-avx2
But gcc wins big on matrix.c, especially with -mprefer-vector-width=none
-mno-fma
>From gcc-bugs-return-583502-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 17:04:32 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Wed, 29 Nov 2017 17:04:00 -0000
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--- Comment #33 from Andrew Roberts <andrewm.roberts at sky dot com> ---
That second llvm command line should read:
/usr/local/llvm-5.0.1-rc2/bin/clang -march=znver1 -mtune=znver1 -Ofast
mt19937ar.c -o mt19937ar
>From gcc-bugs-return-583503-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 17:05:57 2017
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Subject: [Bug debug/83199] [8 Regression] FAIL: gdb.base/async.exp & gdb.base/skip.exp
Date: Wed, 29 Nov 2017 17:05:00 -0000
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--- Comment #6 from Jan Kratochvil <jan.kratochvil at redhat dot com> ---
The Comment 5 binaries SEGV and do not start on Fedora 26 armv7l.
But I do not see some wrong DWARF there.
(In reply to Jan Kratochvil from comment #3)
> Addresses are missing when the function is inlined.
> But these testfiles do not use -O optimization so I find wrong if GCC has
> inlined anything.
I was sure wrong here, in this case the address is not displayed when it
matches the first instruction of a source line.
It could be rather bugreported to GDB how to make it reproducible (I haven't
built GCC trunk on that Fedora 26 armv7l, though).
>From gcc-bugs-return-583504-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 17:13:58 2017
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Subject: [Bug c++/83217] New: Compiler segfault: structured binding by reference to a templated type via a pointer
Date: Wed, 29 Nov 2017 17:13:00 -0000
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Bug ID: 83217
Summary: Compiler segfault: structured binding by reference to
a templated type via a pointer
Product: gcc
Version: 7.2.0
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The following code produces a compiler segmentation fault.
```
template <typename T>
struct Object
{
T a;
};
int main()
{
Object<int> *it;
auto & [k] = *it;
}
```
I'm getting the same error with g++ 7.1 and 7.2, with --std=c++1z on x86.
Here's the compiler error:
```
<source>: In function 'int main()':
10 : <source>:10:19: internal compiler error: Segmentation fault
auto & [k] = *it;
^~
mmap: Cannot allocate memory
```
>From gcc-bugs-return-583505-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 17:35:22 2017
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Subject: [Bug fortran/82606] [PDT] ICE in gfc_extract_int, at fortran/expr.c:641
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 42746
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42746&action=edit
A fix for the problem
The component initializers were being supplied to the derived type components
in the order of the type_spec_list. Thus, a got a null expression, while b got
the expression for '8'.
Bootstraps and regtests.
Paul
>From gcc-bugs-return-583506-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 17:39:30 2017
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Subject: [Bug tree-optimization/83195] [8 regression] pr82929.c scan for "Merging successful" fail
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 29 17:38:54 2017
New Revision: 255247
URL: https://gcc.gnu.org/viewcvs?rev=255247&root=gcc&view=rev
Log:
PR tree-optimization/83195
* gcc.dg/pr82929.c: Don't check for "Merging successful" on arm.
* gcc.dg/pr82929-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr82929-2.c
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pr82929.c
>From gcc-bugs-return-583507-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 17:40:47 2017
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Subject: [Bug tree-optimization/83195] [8 regression] pr82929.c scan for "Merging successful" fail
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-583508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 17:41:30 2017
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Subject: [Bug testsuite/83131] c-c++/common/attr-nonstring-3 failure for strcmp tests on PowerPC
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with the following test case.
extern char arr[] __attribute__ ((nonstring));
extern char str[];
int f (void)
{
return __builtin_strcmp (arr, str);
}
The expected output is:
$ gcc -O2 -S -Wall -Wextra -Wpedantic a.c
a.c: In function ‘f’:
a.c:6:10: warning: ‘__builtin_strcmp’ argument 1 declared attribute
‘nonstring’ [-Wstringop-overflow=]
return __builtin_strcmp (arr, str);
^~~~~~~~~~~~~~~~~~~~~~~~~~~
a.c:1:13: note: argument ‘arr’ declared here
extern char arr[] __attribute__ ((nonstring));
^~~
With a powerpc64le-linux GCC, there is no warning.
The strcmp call is expanded in builtins.c and never reaches expand_call in
calls.c where the checking is done. Something similar can happen for strlen on
x86_64 and there it's being handled by also checking in builtins.c (in
expand_builtin_strlen). So strcmp and other string functions will need the
same treatment.
>From gcc-bugs-return-583509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 18:05:27 2017
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Subject: [Bug fortran/83218] New: gforttran command fails to compile if fortran file is present inside folder "%+@"
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Bug ID: 83218
Summary: gforttran command fails to compile if fortran file is
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Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
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Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: sanket.karnik.s at gmail dot com
Target Milestone: ---
I was trying to compile a Fortran file which was present inside a directory
called "%+@". This works fine with gfortran 4.9, however, when I tried to do
the same using gfortran 6.3 I get an error. I tried to compile a simple "Hello
world" program but even that code failed to compile.
Output for version:
gfortran --version
GNU Fortran (MW GCC 6.3.0-GLIBC2.11) 6.3.0
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Reproduction steps from any directory:
1. % mkdir %+@
2. %gedit %+@/hello_world.f90
3. copy following code and save the file:
program hello
print *, "Hello World!"
end program hello
4. gfortran %+@/hello_world.f90
This should produce an error.
>From gcc-bugs-return-583510-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 18:54:24 2017
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Subject: [Bug fortran/83218] gforttran command fails to compile if fortran file is present inside folder "%+@"
Date: Wed, 29 Nov 2017 18:54:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-11-29
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
WORKSFORME on x86_64-apple-darwin17.
>From gcc-bugs-return-583511-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 19:12:06 2017
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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/83219] New: [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
Date: Wed, 29 Nov 2017 19:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83219
Bug ID: 83219
Summary: [8 regression] c-c++-common/ubsan/unreachable-2.c
fails starting with r255201
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Saw this on powerpc64 both LE and BE.
This test case is looking for a specific failure
c-c++-common/ubsan/unreachable-2.c:11:41: runtime error: execution reached a
__builtin_unreachable() call
but after this revision it no longer occurs.
Executing on host:
/home/seurer/gcc/build/gcc-trunk/gcc/testsuite/g++1/../../xg++
-B/home/seurer/gcc/build/gcc-trunk/gcc/testsuite/g++1/../../
/home/seurer/gcc/gcc-trunk/gcc/testsuite/c-c++-common/ubsan/unreachable-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -nostdinc++
-I/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/powerpc64le-unknown-linux-gnu
-I/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/gcc-trunk/libstdc++-v3/libsupc++
-I/home/seurer/gcc/gcc-trunk/libstdc++-v3/include/backward
-I/home/seurer/gcc/gcc-trunk/libstdc++-v3/testsuite/util -fmessage-length=0
-O2 -fsanitize=unreachable
-B/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libsanitizer/
-B/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libsanitizer/ubsan/
-L/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libsanitizer/ubsan/.libs
-L/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs
-B/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs
-L/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs
-B/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libitm/
-L/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libitm/.libs
-lm -o ./unreachable-2.exe (timeout = 300)
spawn -ignore SIGHUP
/home/seurer/gcc/build/gcc-trunk/gcc/testsuite/g++1/../../xg++
-B/home/seurer/gcc/build/gcc-trunk/gcc/testsuite/g++1/../../
/home/seurer/gcc/gcc-trunk/gcc/testsuite/c-c++-common/ubsan/unreachable-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -nostdinc++
-I/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/powerpc64le-unknown-linux-gnu
-I/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/gcc-trunk/libstdc++-v3/libsupc++
-I/home/seurer/gcc/gcc-trunk/libstdc++-v3/include/backward
-I/home/seurer/gcc/gcc-trunk/libstdc++-v3/testsuite/util -fmessage-length=0 -O2
-fsanitize=unreachable
-B/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libsanitizer/
-B/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libsanitizer/ubsan/
-L/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libsanitizer/ubsan/.libs
-L/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs
-B/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs
-L/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs
-B/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libitm/
-L/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libitm/.libs
-lm -o ./unreachable-2.exe
PASS: c-c++-common/ubsan/unreachable-2.c -O2 (test for excess errors)
Setting LD_LIBRARY_PATH to
.:/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libitm/.libs:/home/seurer/gcc/build/gcc-trunk/gcc:/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libsanitizer/ubsan/.libs:/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:.:/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libitm/.libs:/home/seurer/gcc/build/gcc-trunk/gcc:/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libsanitizer/ubsan/.libs:/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-trunk/./gmp/.libs:/home/seurer/gcc/build/gcc-trunk/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-trunk/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-trunk/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-trunk/./mpc/src/.libs:/home/seurer/gcc/build/gcc-trunk/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-trunk/./isl/.libs:/home/seurer/gcc/build/gcc-trunk/./prev-isl/.libs:/home/seurer/gcc/install/gcc-7.1.0/lib64
spawn [open ...]
FAIL: c-c++-common/ubsan/unreachable-2.c -O2 execution test
>From gcc-bugs-return-583512-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 19:33:32 2017
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From: "stefan at potyra dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83220] New: modification of a global register variable while the function only reads from it
Date: Wed, 29 Nov 2017 19:33:00 -0000
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Bug ID: 83220
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function only reads from it
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Hi,
thanks for your work on gcc!
>> gcc --version
gcc (Debian 7.2.0-16) 7.2.0
(amd64 environment)
Compiling the following program code results in modification of rbp, even
though the function should only read from it:
struct cpssp {
union {
long double d;
unsigned long long mmx[2];
} fpregs[8];
unsigned int fpstt;
};
#define ST0(cpssp) (cpssp->fpregs[cpssp->fpstt].d)
#define ST(cpssp, n) (cpssp->fpregs[(cpssp->fpstt + (n)) & 7].d)
register struct cpssp *env asm ("rbp");
unsigned int PARAM1;
void op_fxchg_ST0_STN(void)
{
long double tmp;
tmp = ST(env, PARAM1);
ST(env, PARAM1) = ST0(env);
ST0(env) = tmp;
}
>> objdump -d test.o
test.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <op_fxchg_ST0_STN>:
0: 8b 95 80 00 00 00 mov 0x80(%rbp),%edx
6: 8b 05 00 00 00 00 mov 0x0(%rip),%eax # c
<op_fxchg_ST0_STN+0xc>
c: 01 d0 add %edx,%eax
e: 48 c1 e2 04 shl $0x4,%rdx
12: 83 e0 07 and $0x7,%eax
15: 48 c1 e0 04 shl $0x4,%rax
19: 48 01 e8 add %rbp,%rax
1c: 48 01 d5 add %rdx,%rbp
1f: db 28 fldt (%rax)
21: db 6d 00 fldt 0x0(%rbp)
24: db 38 fstpt (%rax)
26: db 7d 00 fstpt 0x0(%rbp)
29: c3 retq
At offset 1c, rbp is modified, while the code should not change it.
Can you take a look?
If you need more information please ask.
P.S.: This is a (simplified) portion of code found in FAUmachine and Volkmar
Sieh found the actual problem. If you have a workaround, I am very happy to
hear it.
Cheers,
Stefan.
>From gcc-bugs-return-583514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 19:41:59 2017
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Subject: [Bug bootstrap/83096] Bootstrap on darwin x86_64-apple-darwin15.6.0 (revision 254990) fails
Date: Wed, 29 Nov 2017 19:41:00 -0000
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Aldy Hernandez <aldyh at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Fixed by:
commit b39d9a350c613cde6d8cd15a4d0db082cd904ef2
Author: gerald <gerald@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon Nov 27 17:29:06 2017 +0000
* hash-set.h (DEFINE_DEBUG_HASH_SET): Remove static qualifier
from explicit instantiation of debug_helper.
* vec.h (DEFINE_DEBUG_VEC): Ditto.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@255175
138bc75d-0d04-0410-961f-82ee72b054a4
Closing.
>From gcc-bugs-return-583513-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 19:41:16 2017
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Subject: [Bug bootstrap/81470] [8 Regression] Bootstrap comparison failures in gcc/ada
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--- Comment #10 from Olivier Hainque <hainque at gcc dot gnu.org> ---
Created attachment 42747
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42747&action=edit
[patch] don't emit .cfi_personality/.cfi_lsda for !dwarf2 eh
We had a patch for something of this kind we had
observed with local versions of gcc-6. We just recently
observed the same failure/correction on gcc-7 and I
was about to propose the patch for inclusion.
The issue is differences in the generation of
some data items between -g and -g2, visible with
LDFCM labels in particular.
These are somehow related to the emission of
.cfi_personality and .cfi_lsda by dwarf2out_do_cfi_startproc
which aren't needed for SEH anyway.
The proposed patch just prevents the generation of
those .cfi notes if the target eh format isn't dwarf2.
>From gcc-bugs-return-583515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 29 19:55:10 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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--- Comment #34 from Jan Hubicka <hubicka at ucw dot cz> ---
> So gcc loses on mt19937ar.c without -mno-avx2
> But gcc wins big on matrix.c, especially with -mprefer-vector-width=none
> -mno-fma
It is because llvm does not use vgather at all unless avx512 is present. I
will
look into the vgather cost model tomorrow.
Honza
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Subject: [Bug tree-optimization/83221] New: qsort comparator not anti-commutative: -2147483648, -2147483648
Date: Wed, 29 Nov 2017 20:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83221
Bug ID: 83221
Summary: qsort comparator not anti-commutative: -2147483648,
-2147483648
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 42748
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42748&action=edit
reproducer
gcc trunk rev255248, x86_64.
> time g++ -std=c++11 -w -O2 -o gcc_skx_opt_func.o -c func_reduced_gcc_skx_opt.cpp
func_reduced_gcc_skx_opt.cpp: In function ‘void tf_4_foo()’:
func_reduced_gcc_skx_opt.cpp:250:14: error: qsort comparator not
anti-commutative: -2147483648, -2147483648
void tf_4_foo () {
^~~~~~~~
during GIMPLE pass: reassoc
func_reduced_gcc_skx_opt.cpp:250:14: internal compiler error: qsort checking
failed
0x8f5c3a qsort_chk_error
../../gcc/gcc/vec.c:222
0x8f5ca5 qsort_chk(void*, unsigned long, unsigned long, int (*)(void const*,
void const*))
../../gcc/gcc/vec.c:276
0x7db30b vec<operand_entry*, va_heap, vl_embed>::qsort(int (*)(void const*,
void const*))
../../gcc/gcc/vec.h:1050
0x7db30b vec<operand_entry*, va_heap, vl_ptr>::qsort(int (*)(void const*, void
const*))
../../gcc/gcc/vec.h:1812
0x7db30b reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5831
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
0x7dae22 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5983
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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Subject: [Bug libstdc++/83120] [8 Regression] ext/special_functions/hyperg failure on AIX
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seurer at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |seurer at gcc dot gnu.org
--- Comment #3 from seurer at gcc dot gnu.org ---
FWIW this also fails on powerpc64 both LE and BE starting with r254924.
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Subject: [Bug fortran/82605] [PDT] ICE in insert_parameter_exprs, at fortran/decl.c:3154
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Created attachment 42743 [details]
> A fix for the problem
>
> With the attached patch, now produces the error:
The patch works as expected.
> Error: The object ‘x’ at (1) has a deferred LEN parameter ‘b’ and
> is neither allocatable nor a pointer
>
> Giving x either attribute allows compilation and correct execution.
> (I assume that x%a, being a KIND parameter, is OK in a KIND specification?
I see something strange with/without the patch:
program p
type t(a, b)
integer, kind :: a
integer, len :: b
real(a) :: r(b)
end type
type(t(8, 10)) :: x
real(x%a) :: y
print *, kind(x%r), kind(y)
end
prints
8 8
while
program p
type t(a, b)
integer, kind :: a
integer, len :: b
real(a) :: r(b)
end type
type(t(8, :)), allocatable :: x
real(x%a) :: y
print *, kind(x%a), kind(y)
end
prints
4 8
In addition with the last test, I did not find a way to do any allocation.
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Subject: [Bug c++/82760] Incorrect code generated for aligned new
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Nov 29 21:01:23 2017
New Revision: 255253
URL: https://gcc.gnu.org/viewcvs?rev=255253&root=gcc&view=rev
Log:
PR c++/82760 - memory corruption with aligned new.
* call.c (build_operator_new_call): Update *args if we add the
align_arg.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/aligned-new8.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
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Subject: [Bug fortran/82606] [PDT] ICE in gfc_extract_int, at fortran/expr.c:641
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--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Created attachment 42746 [details]
> A fix for the problem
This fix the test in comment 0, but not the one in comment 1.
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Subject: [Bug c++/82293] [8 Regression] ICE in nonlambda_method_basetype at gcc/cp/lambda.c:886
Date: Wed, 29 Nov 2017 21:54:00 -0000
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--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Wed Nov 29 21:54:18 2017
New Revision: 255254
URL: https://gcc.gnu.org/viewcvs?rev=255254&root=gcc&view=rev
Log:
/cp
2017-11-29 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/82293
* lambda.c (nonlambda_method_basetype): Don't use LAMBDA_TYPE_P
on a null type.
/testsuite
2017-11-29 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/82293
* g++.dg/cpp0x/lambda/lambda-ice24.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-ice24.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/lambda.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/82293] [8 Regression] ICE in nonlambda_method_basetype at gcc/cp/lambda.c:886
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Assignee|paolo.carlini at oracle dot com |unassigned at gcc dot gnu.org
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed.
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Subject: [Bug ipa/82808] [7/8 Regression] LTO clone wrong value
Date: Wed, 29 Nov 2017 22:14:00 -0000
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--- Comment #10 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Wed Nov 29 22:13:34 2017
New Revision: 255256
URL: https://gcc.gnu.org/viewcvs?rev=255256&root=gcc&view=rev
Log:
Be conservative with arithmetic jmp-function types
2017-11-29 Martin Jambor <mjambor@suse.cz>
PR ipa/82808
* tree.c (expr_type_first_operand_type_p): New function.
* tree.h (expr_type_first_operand_type_p): Declare it.
* ipa-cp.c (ipa_get_jf_pass_through_result): Use it.
testsuite/
* gcc.dg/ipa/pr82808.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/ipa/pr82808.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/ipa-cp.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree.c
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Subject: [Bug ipa/82808] [7/8 Regression] LTO clone wrong value
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
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--- Comment #11 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug rtl-optimization/80818] LRA clobbers live hard reg clobbered during rematerialization
Date: Wed, 29 Nov 2017 22:20:00 -0000
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--- Comment #10 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Wed Nov 29 22:19:25 2017
New Revision: 255258
URL: https://gcc.gnu.org/viewcvs?rev=255258&root=gcc&view=rev
Log:
2017-11-29 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/80818
* lra.c (collect_non_operand_hard_regs): New arg insn. Pass it
recursively. Use insn code for clobber.
(lra_set_insn_recog_data): Pass the new arg to
collect_non_operand_hard_regs.
(add_regs_to_insn_regno_info): Pass insn instead of uid. Use insn
code for clobber.
(lra_update_insn_regno_info): Pass insn to
add_regs_to_insn_regno_info.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lra.c
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Subject: [Bug tree-optimization/81018] [8 regression] gfortran.dg/graphite/pr14741.f90 FAILs
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Subject: [Bug tree-optimization/82819] [8 Regression] [graphite] ICE in set_codegen_error, at graphite-isl-ast-to-gimple.c:206
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Subject: [Bug tree-optimization/83176] [8 Regression] [graphite] ICE in set_codegen_error, at graphite-isl-ast-to-gimple.c:206
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Subject: [Bug tree-optimization/83216] [8 regression] FAIL: gcc.dg/graphite/interchange-3.c
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Subject: [Bug rtl-optimization/82621] [6/7 Regression] wrong code with -Og -fgcse -fweb
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--- Comment #11 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Wed Nov 29 22:42:37 2017
New Revision: 255260
URL: https://gcc.gnu.org/viewcvs?rev=255260&root=gcc&view=rev
Log:
combine: Do not throw away unneeded arms of parallels (PR83156)
The fix for PR82621 makes us not split an I2 if one of the results of
those SETs is unused, since combine does not handle that properly. But
this results in degradation for i386 (or more in general, for any
target that does not have patterns for parallels with an unused result
as a CLOBBER instead of a SET for that result).
This patch instead makes us not split only if one of the results is set
again before I3. That fixes PR83156 and also fixes PR82621.
Unfortunately it undoes the nice optimisations that the previous patch
did on powerpc.
PR rtl-optimization/83156
PR rtl-optimization/82621
* combine.c (try_combine): Don't split an I2 if one of the dests is
set again before I3. Allow unused dests.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
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Subject: [Bug target/83156] [8 regression] gcc.target/i386/pr82361-1.c fail
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Wed Nov 29 22:42:37 2017
New Revision: 255260
URL: https://gcc.gnu.org/viewcvs?rev=255260&root=gcc&view=rev
Log:
combine: Do not throw away unneeded arms of parallels (PR83156)
The fix for PR82621 makes us not split an I2 if one of the results of
those SETs is unused, since combine does not handle that properly. But
this results in degradation for i386 (or more in general, for any
target that does not have patterns for parallels with an unused result
as a CLOBBER instead of a SET for that result).
This patch instead makes us not split only if one of the results is set
again before I3. That fixes PR83156 and also fixes PR82621.
Unfortunately it undoes the nice optimisations that the previous patch
did on powerpc.
PR rtl-optimization/83156
PR rtl-optimization/82621
* combine.c (try_combine): Don't split an I2 if one of the dests is
set again before I3. Allow unused dests.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
>From gcc-bugs-return-583532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 01:07:04 2017
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From: "ian at airs dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83222] New: [ 8 regression] Inconsistent "initializer element is not constant" error
Date: Thu, 30 Nov 2017 01:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83222
Bug ID: 83222
Summary: [ 8 regression] Inconsistent "initializer element is
not constant" error
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: ian at airs dot com
Target Milestone: ---
The handling of this C program recently changed:
const char _expA = 0x42;
void __cgo_f_1_4(void) { static const double x = (double)(_expA); }
With a GCC built on October 10, 2017, I get this:
foo.c: In function ‘__cgo_f_1_4’:
foo.c:2:50: error: initializer element is not constant
void __cgo_f_1_4(void) { static const double x = (double)(_expA); }
^
With this morning's sources (November 29, 2017) the program compiles without
error.
Perhaps that change is OK. But this similar program still fails:
const char _expA = 0x42;
double __cgodebug_floats[] = {
_expA,
1
};
foo1.c:3:3: error: initializer element is not constant
_expA,
^~~~~
foo1.c:3:3: note: (near initialization for ‘__cgodebug_floats[0]’)
I think that if we are going to change the behavior for the first program, we
need to change the behavior for the second one.
>From gcc-bugs-return-583533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 01:10:21 2017
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Subject: [Bug c/83222] [ 8 regression] Inconsistent "initializer element is not constant" error
Date: Thu, 30 Nov 2017 01:10:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
Target Milestone|--- |8.0
Severity|critical |normal
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From: "ian at airs dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83222] [ 8 regression] Inconsistent "initializer element is not constant" error
Date: Thu, 30 Nov 2017 01:13:00 -0000
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Ian Lance Taylor <ian at airs dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Ian Lance Taylor <ian at airs dot com> ---
This may be caused by the recent fix for PR 69960.
>From gcc-bugs-return-583535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 01:18:53 2017
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From: "george.burgess.iv at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83223] New: -fconserve-stack outlined code isn't dropped if it's logically unreachable
Date: Thu, 30 Nov 2017 01:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83223
Bug ID: 83223
Summary: -fconserve-stack outlined code isn't dropped if it's
logically unreachable
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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GCC version: Reproed on godbolt's GCC trunk, 7.2, and 4.9.
Test case (godbolt link, if you'd prefer: https://godbolt.org/g/zxhjPV):
$ echo 'struct data { char foo[64]; };
void complain() __attribute__((warning("oh no!")));
void panic(const char *) __attribute__((noreturn, cold));
void *foo_real(void *, const void *);
void bar(struct data *ptr) {
char tmp[sizeof(ptr->foo)];
if (__builtin_object_size(ptr->foo, 0) >= sizeof(ptr->foo)) {
foo_real(ptr->foo, tmp);
} else {
complain();
panic("");
}
}
__auto_type v = bar;' | gcc -x c -fconserve-stack -O2 - -o /dev/null -c
<stdin>: In function ‘bar.part.0’:
<stdin>:12:5: warning: call to ‘complain’ declared with attribute warning: oh
no!
It looks like the outlined part sticks around if `bar`'s address is taken.
Normally, this isn't a problem. However, it can cause false-positives in code
that uses the warning or error attributes (as shown above).
>From gcc-bugs-return-583536-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 01:39:14 2017
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From: "lh_mouse at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80881] [7/8 Regression] null pointer access in libgomp.h
Date: Thu, 30 Nov 2017 01:39:00 -0000
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--- Comment #10 from Liu Hao <lh_mouse at 126 dot com> ---
Compiling this rather simple program using your gcc:
```
__thread int a = 1;
int get_a(void){
return a;
}
```
resulted in wrong assembly:
```
E:\Desktop\gcc-7.1.0-debug-broken-tls\bin>gcc E:\Desktop\test.c -S -masm=intel
-O2 -o -
.file "test.c"
.intel_syntax noprefix
.text
.p2align 4,,15
.globl get_a
.def get_a; .scl 2; .type 32; .endef
.seh_proc get_a
get_a:
.seh_endprologue
mov rax, QWORD PTR fs:0
mov eax, DWORD PTR a@tpoff[rax]
ret
.seh_endproc
.globl a
.data
.align 4
a:
.long 1
.ident "GCC: (GNU) 7.1.0"
```
With my working GCC it resulted in:
```
E:\Desktop>gcc E:\Desktop\test.c -S -masm=intel -O2 -o -
.file "test.c"
.intel_syntax noprefix
.text
.globl get_a
.def get_a; .scl 2; .type 32; .endef
.seh_proc get_a
get_a:
sub rsp, 40
.seh_stackalloc 40
.seh_endprologue
lea rcx, __emutls_v.a[rip]
call __emutls_get_address
mov eax, DWORD PTR [rax]
add rsp, 40
ret
.seh_endproc
.section .rdata,"dr"
.align 4
__emutls_t.a:
.long 1
.globl __emutls_v.a
.data
.align 32
__emutls_v.a:
.quad 4
.quad 4
.quad 0
.quad __emutls_t.a
.ident "GCC: (gcc-7-branch HEAD with MCF thread model, built by
LH_Mouse.) 7.2.1 20171119"
.def __emutls_get_address; .scl 2; .type 32; .endef
```
>From gcc-bugs-return-583537-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 01:50:13 2017
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From: "lh_mouse at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80881] [7/8 Regression] null pointer access in libgomp.h
Date: Thu, 30 Nov 2017 01:50:00 -0000
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--- Comment #11 from Liu Hao <lh_mouse at 126 dot com> ---
Diff'ing configure options used to build both GCC produces the following
result:
```
E:\Desktop>gcc-7.1.0-debug-broken-tls\bin\gcc.exe -v 2>&1 | sed "s/ --/\n&/g" >
yours.txt
E:\Desktop>gcc -v 2>&1 | sed "s/ --/\n&/g" > mine.txt
E:\Desktop>gcc-7.1.0-debug-broken-tls\bin\gcc.exe -v 2>&1 | sed "s/ --/\n&/g" >
yours.txt
E:\Desktop>diff --color -U1 mine.txt yours.txt
--- mine.txt 2017-11-30 09:42:33.612869600 +0800
+++ yours.txt 2017-11-30 09:42:35.493977200 +0800
@@ -1,47 +1,35 @@
Using built-in specs.
-COLLECT_GCC=gcc
-COLLECT_LTO_WRAPPER=C:/MinGW/MSYS2/mingw64/lib/gcc/x86_64-w64-mingw32/7.2.1/lto-wrapper.exe
+COLLECT_GCC=gcc-7.1.0-debug-broken-tls\bin\gcc.exe
+COLLECT_LTO_WRAPPER=e:/desktop/gcc-7.1.0-debug-broken-tls/bin/../libexec/gcc/x86_64-w64-mingw32/7.1.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
-Configured with: ../gcc/configure
- --prefix=/mingw64
- --with-local-prefix=/mingw64/local
- --build=x86_64-w64-mingw32
+Configured with: ../../src/gcc-7.1.0/configure
--host=x86_64-w64-mingw32
- --target=x86_64-w64-mingw32
- --with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include
- --libexecdir=/mingw64/lib
- --enable-bootstrap
- --with-arch=x86-64
- --with-tune=nocona
- --enable-languages=c,lto,c++
- --enable-shared
+ --enable-languages=c,c++
+ --enable-seh-exceptions
+ --enable-threads=posix
+ --enable-tls
+ --disable-nls
+ --disable-shared
--enable-static
- --enable-threads=mcf
- --enable-graphite
--enable-fully-dynamic-string
- --enable-libstdcxx-time=yes
- --disable-libstdcxx-pch
- --disable-libstdcxx-debug
- --disable-isl-version-check
--enable-lto
+ --enable-plugins
--enable-libgomp
- --disable-multilib
- --enable-checking=release
- --disable-rpath
+ --with-dwarf2
--disable-win32-registry
- --enable-nls
- --disable-werror
- --disable-symvers
- --with-libiconv
- --with-system-zlib
- --with-gmp=/mingw64
- --with-mpfr=/mingw64
- --with-mpc=/mingw64
- --with-isl=/mingw64
- --with-pkgversion='gcc-7-branch HEAD with MCF thread model, built by
LH_Mouse.'
- --with-bugurl=https://gcc-mcf.lhmouse.com/
- --with-gnu-as
- --with-gnu-ld
- --disable-tls
-Thread model: mcf
-gcc version 7.2.1 20171119 (gcc-7-branch HEAD with MCF thread model, built by
LH_Mouse.)
+ --enable-version-specific-runtime-libs
+ --prefix=/mingw64-64
+ --with-sysroot=/mingw64-64
+ --target=x86_64-w64-mingw32
+ --enable-targets=all
+ --enable-checking=release
+ --with-gmp=/usr/new-gcc/lib/gmp-5.0.5
+ --with-mpfr=/usr/new-gcc/lib/mpfr-2.4.2
+ --with-mpc=/usr/new-gcc/lib/mpc-0.9
+ --with-isl=/usr/new-gcc/lib/isl-0.18
+ --with-cloog=/usr/new-gcc/lib/cloog-0.18.4
+ --with-host-libstdcxx='-lstdc++ -lsupc++'
+ --disable-cloog-version-check
+ --enable-cloog-backend=isl
+Thread model: posix
+gcc version 7.1.0 (GCC)
E:\Desktop>
```
I notice that:
0) You didn't specify `--build=`.
1) You specified `--enable-targets=all` but I think this does not affect mingw
targets according to <https://gcc.gnu.org/install/configure.html> and should be
removed.
Maybe you should try adding `--build=`?
>From gcc-bugs-return-583538-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 03:40:17 2017
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Subject: [Bug libfortran/81937] stack-buffer-overflow on memcpy in libgfortran/io/unix.c on character(kind=4)
Date: Thu, 30 Nov 2017 03:40:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |jvdelisle at gcc dot gnu.org
--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
I will get on this one shortly.
>From gcc-bugs-return-583539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 05:09:09 2017
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Subject: [Bug target/83100] [8 Regression] powerpc: internal compiler error: in get_variable_section, at varasm.c:1150 with -fdata-sections
Date: Thu, 30 Nov 2017 05:09:00 -0000
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--- Comment #10 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Thu Nov 30 05:03:29 2017
New Revision: 255266
URL: https://gcc.gnu.org/viewcvs?rev=255266&root=gcc&view=rev
Log:
compiler: don't make map zero value constant
The map zero value is a common symbol, and it doesn't really make
sense to have a constant common symbol. Current GCC has started to
reject this case, probably as part of the fix for PR 83100.
Reviewed-on: https://go-review.googlesource.com/80877
Modified:
trunk/gcc/go/gofrontend/MERGE
trunk/gcc/go/gofrontend/types.cc
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From: "daniel.f.starke at freenet dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80881] [7/8 Regression] null pointer access in libgomp.h
Date: Thu, 30 Nov 2017 05:50:00 -0000
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--- Comment #12 from Daniel Starke <daniel.f.starke at freenet dot de> ---
I am not an expert on this field but your build does not use platform tls
support as mine is supposed to do. Furthermore, I was building all under
Windows. The only difference during the build process was the target
architecture (x86/x64). Using --enable-targets=all produced a compiler able to
build for both architectures. Not specifying --build= should just default to
the base compilers default target (which is, nevertheless, Windows). The only
issue I could possible see here is that the base compiler used to build GCC did
not support platform tls support but GCC still assumed it was available
resulting in a wrong setup. In this sense I was cross compiling (mingw x86 to
mingw-w64 x64).
Nevertheless, building GCC without --enable-tls like you did produces a working
executable for me too as mentioned on 2017-05-26.
>From gcc-bugs-return-583541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 06:17:35 2017
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Subject: [Bug target/80881] [7/8 Regression] null pointer access in libgomp.h
Date: Thu, 30 Nov 2017 06:17:00 -0000
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--- Comment #13 from Liu Hao <lh_mouse at 126 dot com> ---
Native TLS requires essential support from LD, which I don't think is going to
be available in foreseeable future.
Without native TLS GCC tries to use emulated TLS, and if it generates code
attempting to use the native one (which does not exist), it is, of course, a
bug.
>From gcc-bugs-return-583542-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 06:22:10 2017
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Subject: [Bug fortran/83224] New: creating character array from elements shorter than declared does not pad with whitespace properly and aborts
Date: Thu, 30 Nov 2017 06:22:00 -0000
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I expect this program to produce at the end
============================================================
PASS 21
[one ][two ][three ][four ][five ]
[six ][seven ][eight ][nine ][ten[ ]
[eleven ][twelve ][thirteen ][fourteen ][fifteen ]
[sixteen ][seventeen][eighteen ][nineteen ][twenty ]
[twentyone]
============================================================
Instead, I got an abort when the length reached 9 characters, and without
the blank padding I was expecting ....
============================================================
PASS 16
[onetwttw][twothtth][threeffo][four ffi][five ssi]
[six sse][seveneei][eightnni][nine tte][ten eel]
[eleventw][twelveth][thirteen][fourteen][fifteen ]
[sixteen ]
============================================================
Program received signal SIGABRT: Process abort signal.
I am using gfortran 6.4 on Cygwin, and it was confirmed that it
acts as I thought it would with another Fortran implementation
(Intel 18.0.1).
program dusty_corner ! exercise f2008 CHARACTER features
implicit none
character(len=:),allocatable :: words(:)
character(len=:),allocatable :: trimmed
integer :: i,big
character(len=*),parameter :: data(*)=[character(len=20) :: &
'one', 'two', 'three', 'four', 'five', &
'six', 'seven', 'eight', 'nine', 'ten' , &
'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', &
'sixteen', 'seventeen', 'eighteen', 'nineteen', 'twenty', &
'twentyone' ]
words=[character(len=0)::] ! Allocate zero-size array
big=0
INFINITE: do i=1,size(data)
trimmed=trim(data(i)) ! create variables of various lengths
big=max(big,len(trimmed)) ! find longest length so far
! next, when BIG increases WORDS should be padded with spaces?
words=[ CHARACTER(LEN=big) :: words, trimmed ]
write(*,'(a,i0)')'PASS ',i
write(*,'(5("[",a,"]":))')words
write(*,'(a)')repeat('=',80)
enddo INFINITE
end program dusty_corner
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Subject: [Bug tree-optimization/83202] Try joining operations on consecutive array elements during tree vectorization
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
The last commit fixed the testcase incomment #1.
>From gcc-bugs-return-583543-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 07:54:11 2017
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Subject: [Bug tree-optimization/83202] Try joining operations on consecutive array elements during tree vectorization
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Nov 30 07:53:31 2017
New Revision: 255267
URL: https://gcc.gnu.org/viewcvs?rev=255267&root=gcc&view=rev
Log:
2017-11-30 Richard Biener <rguenther@suse.de>
PR tree-optimization/83202
* tree-ssa-loop-ivcanon.c (try_unroll_loop_completely): Add
allow_peel argument and guard peeling.
(canonicalize_loop_induction_variables): Likewise.
(canonicalize_induction_variables): Pass false.
(tree_unroll_loops_completely_1): Pass unroll_outer to disallow
peeling from cunrolli.
* gcc.dg/vect/pr83202-1.c: New testcase.
* gcc.dg/tree-ssa/pr61743-1.c: Adjust.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr83202-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr61743-1.c
trunk/gcc/tree-ssa-loop-ivcanon.c
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Subject: [Bug tree-optimization/83221] [8 Regression] qsort comparator not anti-commutative: -2147483648, -2147483648
Date: Thu, 30 Nov 2017 07:57:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-checking,
| |ice-on-valid-code
Target Milestone|--- |8.0
Summary|qsort comparator not |[8 Regression] qsort
|anti-commutative: |comparator not
|-2147483648, -2147483648 |anti-commutative:
| |-2147483648, -2147483648
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Subject: [Bug target/83220] modification of a global register variable while the function only reads from it
Date: Thu, 30 Nov 2017 08:04:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ra, wrong-code
Target| |x86_64-*-* i?86-*-*
Component|c |target
Version|unknown |8.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Try -ffixed-rbp, not sure if your expectations are valid. It might have to do
with a regstack thing given you use x87 math.
Confirmed on trunk with -O2, -ffixed-rbp seems to work.
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Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
Date: Thu, 30 Nov 2017 08:04:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-30
CC| |dodji at gcc dot gnu.org,
| |dvyukov at gcc dot gnu.org,
| |jakub at gcc dot gnu.org,
| |kcc at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Component|other |sanitizer
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a looksee.
>From gcc-bugs-return-583548-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 08:18:38 2017
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Subject: [Bug fortran/81827] Large compile time with derived-type rrays
Date: Thu, 30 Nov 2017 08:18:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |needs-bisection
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Somehow after being reasonable for some time this regressed badly again...
Last known good rev. 254418, first known bad rev. 254511
slows down our regular tester by some hours :/
>From gcc-bugs-return-583549-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 08:51:59 2017
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Subject: [Bug fortran/81827] Large compile time with derived-type rrays
Date: Thu, 30 Nov 2017 08:51:00 -0000
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note it happens at -O0 already (going OOM) so a FE issue (was fine before).
>From gcc-bugs-return-583550-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 08:56:05 2017
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Subject: [Bug fortran/81827] Large compile time with derived-type rrays
Date: Thu, 30 Nov 2017 08:56:00 -0000
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, no, all memory is allocate by IRA (and somehow never freed?)
>From gcc-bugs-return-583551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 08:56:21 2017
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Subject: [Bug fortran/81827] Large compile time with derived-type rrays
Date: Thu, 30 Nov 2017 08:56:00 -0000
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Bisection would be nice.
>From gcc-bugs-return-583552-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 08:58:34 2017
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Subject: [Bug fortran/81827] Large compile time with derived-type rrays
Date: Thu, 30 Nov 2017 08:58:00 -0000
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--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
Tops out at 4.4GB now at -O0, was hovering around 1GB for some time.
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Subject: [Bug bootstrap/81470] [8 Regression] Bootstrap comparison failures in gcc/ada
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Olivier Hainque <hainque at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #42747|[patch] don't emit |don't emit
description|.cfi_personality/.cfi_lsda |.cfi_personality/.cfi_lsda
|for !dwarf2 eh |for !dwarf2 eh
--- Comment #11 from Olivier Hainque <hainque at gcc dot gnu.org> ---
Comment on attachment 42747
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42747
don't emit .cfi_personality/.cfi_lsda for !dwarf2 eh
>diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
>index 3d619b8..62b5c77 100644
>--- a/gcc/dwarf2out.c
>+++ b/gcc/dwarf2out.c
>@@ -958,10 +958,16 @@ dwarf2out_do_cfi_startproc (bool second)
> {
> int enc;
> rtx ref;
>- rtx personality = get_personality_function (current_function_decl);
>
> fprintf (asm_out_file, "\t.cfi_startproc\n");
>
>+ /* .cfi_personality and .cfi_lsda are only relevant to DWARF2
>+ eh unwinders. */
>+ if (targetm_common.except_unwind_info (&global_options) != UI_DWARF2)
>+ return;
>+
>+ rtx personality = get_personality_function (current_function_decl);
>+
> if (personality)
> {
> enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, /*global=*/1);
>From gcc-bugs-return-583554-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 09:16:51 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
Date: Thu, 30 Nov 2017 09:16:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hum. Where do we "instrument" __builtin_unreachable () for UBSAN? EVRP
is now more aggressive with recording ranges, where VRP does it only for
SSA names used dominated by an edge EVRP does it always. This makes us
optimize away the test before RTL expansion (where the instrumentation
happens?).
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
Date: Thu, 30 Nov 2017 09:20:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
pass_sanopt it seems. Quite late. So how is this supposed to work?
The testcase is
int e;
int
main (void)
{
return e ? 0 : (__builtin_unreachable (), 1);
}
and I bet that if we do
int e;
int
main (void)
{
if (e)
return e;
__builtin_unreachable ();
}
we'd optimize it before with regular VRP.
Yes, we do.
So - why are __builtin_unreachable ()s not instrumented early? They are,
after all, no longer "unreachable".
>From gcc-bugs-return-583556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 09:23:26 2017
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Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
Date: Thu, 30 Nov 2017 09:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
And the testcase runs exclusively at -O2 for whatever reason...
Marek, you introduced this testcase together with moving instrumentation to
sanopt.
>From gcc-bugs-return-583557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 09:37:18 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Thu, 30 Nov 2017 09:37:00 -0000
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--- Comment #35 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Thu Nov 30 09:36:36 2017
New Revision: 255268
URL: https://gcc.gnu.org/viewcvs?rev=255268&root=gcc&view=rev
Log:
PR target/81616
* x86-tnue-costs.h (generic_cost): Revise for modern CPUs
* gcc.target/i386/l_fma_double_1.c: Update count of fma instructions.
* gcc.target/i386/l_fma_double_2.c: Update count of fma instructions.
* gcc.target/i386/l_fma_double_3.c: Update count of fma instructions.
* gcc.target/i386/l_fma_double_4.c: Update count of fma instructions.
* gcc.target/i386/l_fma_double_5.c: Update count of fma instructions.
* gcc.target/i386/l_fma_double_6.c: Update count of fma instructions.
* gcc.target/i386/l_fma_float_1.c: Update count of fma instructions.
* gcc.target/i386/l_fma_float_2.c: Update count of fma instructions.
* gcc.target/i386/l_fma_float_3.c: Update count of fma instructions.
* gcc.target/i386/l_fma_float_4.c: Update count of fma instructions.
* gcc.target/i386/l_fma_float_5.c: Update count of fma instructions.
* gcc.target/i386/l_fma_float_6.c: Update count of fma instructions.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/x86-tune-costs.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/l_fma_double_1.c
trunk/gcc/testsuite/gcc.target/i386/l_fma_double_2.c
trunk/gcc/testsuite/gcc.target/i386/l_fma_double_3.c
trunk/gcc/testsuite/gcc.target/i386/l_fma_double_4.c
trunk/gcc/testsuite/gcc.target/i386/l_fma_double_5.c
trunk/gcc/testsuite/gcc.target/i386/l_fma_double_6.c
trunk/gcc/testsuite/gcc.target/i386/l_fma_float_1.c
trunk/gcc/testsuite/gcc.target/i386/l_fma_float_2.c
trunk/gcc/testsuite/gcc.target/i386/l_fma_float_3.c
trunk/gcc/testsuite/gcc.target/i386/l_fma_float_4.c
trunk/gcc/testsuite/gcc.target/i386/l_fma_float_5.c
trunk/gcc/testsuite/gcc.target/i386/l_fma_float_6.c
>From gcc-bugs-return-583558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 09:41:51 2017
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Subject: [Bug rtl-optimization/83213] [8 Regression] peephole bug with -O2
Date: Thu, 30 Nov 2017 09:41:00 -0000
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--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
Created attachment 42749
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42749&action=edit
C source code
After 12 hours reducing, this is what I got.
I think creduce isn't very fast, in some cases.
>From gcc-bugs-return-583559-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 09:50:26 2017
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Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Because new __builtin_unreachable calls are added everywhere in the
optimization pipeline. I'd rather disable the optimizations where we remove
conditionals or switches that branch to __builtin_unreachable if
(sanitize_flags_p (SANITIZE_UNREACHABLE)).
Not sure where exactly that is though. I see:
/* Discard cases that have an unreachable destination block. */
if (EDGE_COUNT (base_bb->succs) == 0
&& gimple_seq_unreachable_p (bb_seq (base_bb)))
{
edge base_edge = find_edge (gimple_bb (stmt), base_bb);
if (base_edge != NULL)
remove_edge_and_dominated_blocks (base_edge);
i = next_index;
continue;
}
but that is something for switches only, where do we do this for GIMPLE_COND?
BTW, on a related note, I had to skip in c-c++-common/tsan/pr81275.c the -O2 +
C++ testing, the problem there is that the -Wreturn-type warning for C++ needs
the __builtin_unreachable () call too, but that goes away already during cfg
pass right before it. Would it be possible to defer that until after the
pass_warn_function_return if it is the BUILTINS_LOCATION __builtin_unreachable
()?
>From gcc-bugs-return-583560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 09:56:22 2017
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Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For the -fsanitize=unreachable, maybe just gimple_seq_unreachable_p shouldn't
return true ever if sanitize_flags_p (SANITIZE_UNREACHABLE).
>From gcc-bugs-return-583561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 09:58:16 2017
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Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
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--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 30 Nov 2017, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83219
>
> --- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Because new __builtin_unreachable calls are added everywhere in the
> optimization pipeline. I'd rather disable the optimizations where we remove
> conditionals or switches that branch to __builtin_unreachable if
> (sanitize_flags_p (SANITIZE_UNREACHABLE)).
> Not sure where exactly that is though. I see:
> /* Discard cases that have an unreachable destination block. */
> if (EDGE_COUNT (base_bb->succs) == 0
> && gimple_seq_unreachable_p (bb_seq (base_bb)))
> {
> edge base_edge = find_edge (gimple_bb (stmt), base_bb);
> if (base_edge != NULL)
> remove_edge_and_dominated_blocks (base_edge);
> i = next_index;
> continue;
> }
> but that is something for switches only, where do we do this for GIMPLE_COND?
See callers of assert_unreachable_fallthru_edge_p ()
>From gcc-bugs-return-583562-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 09:58:57 2017
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Subject: [Bug fortran/83224] creating character array from elements shorter than declared does not pad with whitespace properly and aborts
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83224
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-30
Blocks| |68241
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 5.5.0 up to trunk.
With the reduced test case
program dusty_corner ! exercise f2008 CHARACTER features
implicit none
character(len=:),allocatable :: words(:)
character(len=:),allocatable :: words1(:), words2(:)
words1=[character(len=3) :: 'one', 'two']
words2=[character(len=5) :: words1, 'three']
write(*,'(5("[",a,"]":))')words2
words=[character(len=3) :: 'one', 'two']
words=[character(len=5) :: words, 'three']
write(*,'(5("[",a,"]":))')words
end program dusty_corner
I get
[one ][two ][three]
[onetw][twoth][three]
The problem comes from using 'words' in both sides of the assignment.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
[Bug 68241] [meta-bug] [F03] Deferred-length character
>From gcc-bugs-return-583563-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 10:00:41 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
Date: Thu, 30 Nov 2017 10:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83219
--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 30 Nov 2017, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83219
>
> --- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> For the -fsanitize=unreachable, maybe just gimple_seq_unreachable_p shouldn't
> return true ever if sanitize_flags_p (SANITIZE_UNREACHABLE).
That probably will work in practice.
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From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83216] [8 regression] FAIL: gcc.dg/graphite/interchange-3.c
Date: Thu, 30 Nov 2017 10:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83216
--- Comment #6 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #5)
> On November 29, 2017 4:35:12 PM GMT+01:00, "thopre01 at gcc dot gnu.org"
> <gcc-bugzilla@gcc.gnu.org> wrote:
> >https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83216
> >
> >--- Comment #3 from Thomas Preud'homme <thopre01 at gcc dot gnu.org>
> >---
> >(In reply to Richard Biener from comment #2)
> >> Can't reproduce
> >>
> >> What ISL version are you using?
> >
> >ISL 0.15.
>
> That's outdated. Can you try 0.18?
>
> Richard.
>
> >Also my apologies but I haven't tried on Arm Cortex-M7 yet actually,
> >typed it
> >in as a force of habit.
> >
> >Best regards.
Fair enough, it PASSes with 0.18. I'm happy having this bug closed then. Sorry
for the noise.
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Subject: [Bug tree-optimization/83216] [8 regression] FAIL: gcc.dg/graphite/interchange-3.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83216
Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #7 from Christophe Lyon <clyon at gcc dot gnu.org> ---
https://gcc.gnu.org/install/prerequisites.html needs an update then: it still
refers to isl 0.15.
contrib/download_prerequisites fetches 0.18, and it is available on
ftp://gcc.gnu.org/pub/gcc/infrastructure/
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Subject: [Bug target/83210] __builtin_mul_overflow() generates suboptimal code when exactly one argument is the constant 2
Date: Thu, 30 Nov 2017 10:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83210
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Nov 30 10:29:58 2017
New Revision: 255269
URL: https://gcc.gnu.org/viewcvs?rev=255269&root=gcc&view=rev
Log:
PR target/83210
* internal-fn.c (expand_mul_overflow): Optimize unsigned
multiplication by power of 2 constant into two shifts + comparison.
* gcc.target/i386/pr83210.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr83210.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/internal-fn.c
trunk/gcc/testsuite/ChangeLog
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83225] New: [8.0 regression] runtime error in transfer.c
Date: Thu, 30 Nov 2017 10:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83225
Bug ID: 83225
Summary: [8.0 regression] runtime error in transfer.c
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: juergen.reuter at desy dot de
Target Milestone: ---
Created attachment 42750
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42750&action=edit
Reproducer
The attached example which I unfortunately couldn't further reduce leads to the
following runtime error:
2$ ./rt_error
4
At line 3218 of file main_ut.f90
Fortran runtime error: End of file
Error termination. Backtrace:
#0 0x7f70c18c9004 in formatted_transfer_scalar_write
at ../../../libgfortran/io/transfer.c:2059
#1 0x7f70c18c916c in formatted_transfer
at ../../../libgfortran/io/transfer.c:2279
#2 0x42bd6f in ???
#3 0x42c664 in ???
#4 0x42c69b in ???
#5 0x7f70c0bc9f44 in ???
#6 0x401288 in ???
#7 0xffffffffffffffff in ???
The gcc/gfortran version is r255190 with the patch from
https://gcc.gnu.org/viewcvs/gcc/branches/gcc-7-branch/gcc/fortran/resolve.c?r1=255029&r2=255205&pathrev=255205
applied.
The reproducer works with gfortran 4.8, 4.9, 5, 6, 7, nagfor 6.1 and ifort 17
and 18. It contains the iso_varying_string module.
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Subject: [Bug rtl-optimization/83213] [8 Regression] peephole bug with -O2
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
My bisection says it starts with r249104, but that doesn't make sense, so it is
likely r249097 or r249098 or some other change from that time.
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Subject: [Bug target/83210] __builtin_mul_overflow() generates suboptimal code when exactly one argument is the constant 2
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42751
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42751&action=edit
gcc8-pr83219.patch
Untested fix.
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Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
Date: Thu, 30 Nov 2017 10:51:00 -0000
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--- Comment #10 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Confirmed on Haswell and Silvermont.
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Subject: [Bug tree-optimization/83043] [8 Regression] FAIL: libgomp.graphite/force-parallel-1.c scan-tree-dump-times graphite "2 loops carried no dependency" 1 (found 0 times)
Date: Thu, 30 Nov 2017 10:56:00 -0000
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Andrey Guskov <andrey.y.guskov at intel dot com> changed:
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----------------------------------------------------------------------------
CC| |andrey.y.guskov at intel dot com
--- Comment #7 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Confirmed on Silvermont.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83225] [8.0 regression] runtime error in transfer.c
Date: Thu, 30 Nov 2017 11:54:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-30
CC| |jvdelisle at gcc dot gnu.org
Known to work| |7.2.0
Ever confirmed|0 |1
Known to fail| |8.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed, could be r254982 (pr78549).
>From gcc-bugs-return-583574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 11:55:19 2017
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From: "sgunderson at bigfoot dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83226] New: [7 Regression] std::map with reference T breaks in C++17 mode
Date: Thu, 30 Nov 2017 11:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83226
Bug ID: 83226
Summary: [7 Regression] std::map with reference T breaks in
C++17 mode
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
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Hi,
The following code works under GCC for -std=c++14, but breaks under -std=c++17:
#include <map>
#include <utility>
int main(void)
{
std::map<int, const int &> m;
std::pair<int, const int &> val(3, 4);
m.insert(val); // Compile error.
m.emplace(3, 4); // Works.
}
I've looked briefly through the standard, but I can't see anything that
indicates you can't have a const reference as value type (not that I'd
recommend it!). The error messages given are:
In file included from /usr/include/c++/7/bits/stl_iterator.h:66:0,
from /usr/include/c++/7/bits/stl_algobase.h:67,
from /usr/include/c++/7/bits/stl_tree.h:63,
from /usr/include/c++/7/map:60,
from test.cc:1:
/usr/include/c++/7/bits/ptr_traits.h: In substitution of ‘template<class _Tp>
template<class _Up> using rebind = _Up* [with _Up = const int&; _Tp =
std::_Rb_tree_node<std::pair<const int, const int&> >]’:
/usr/include/c++/7/bits/ptr_traits.h:147:77: required by substitution of
‘template<class _Ptr, class _Tp> using __ptr_rebind = typename
std::pointer_traits::rebind<_Tp> [with _Ptr =
std::allocator_traits<std::allocator<std::_Rb_tree_node<std::pair<const int,
const int&> > > >::pointer; _Tp = const int&]’
/usr/include/c++/7/bits/node_handle.h:203:69: required by substitution of
‘template<class _Key, class _Value, class _NodeAlloc> template<class _Tp> using
__pointer = std::__ptr_rebind<typename
std::allocator_traits<_NodeAlloc>::pointer, _Tp> [with _Tp = std::pair<const
int, const int&>::second_type; _Key = int; _Value = std::pair<const int, const
int&>; _NodeAlloc = std::allocator<std::_Rb_tree_node<std::pair<const int,
const int&> > >]’
/usr/include/c++/7/bits/node_handle.h:206:60: required from ‘class
std::_Node_handle<int, std::pair<const int, const int&>,
std::allocator<std::_Rb_tree_node<std::pair<const int, const int&> > > >’
test.cc:8:15: required from here
/usr/include/c++/7/bits/ptr_traits.h:133:28: error: forming pointer to
reference type ‘const int&’
using rebind = _Up*;
^
Confirmed with 20171109 snapshot. Clang 5.0.0 with the same libstdc++ gives a
similar error, so I believe this is about the standard library, not the
compiler (unless it's an invalid program).
GCC 6.4.0 does not give an error here, so I'm marking this as a regression.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83225] [8.0 regression] runtime error in transfer.c
Date: Thu, 30 Nov 2017 12:02:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83216] [8 regression] FAIL: gcc.dg/graphite/interchange-3.c
Date: Thu, 30 Nov 2017 12:02:00 -0000
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--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 30 Nov 2017, clyon at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83216
>
> Christophe Lyon <clyon at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |clyon at gcc dot gnu.org
>
> --- Comment #7 from Christophe Lyon <clyon at gcc dot gnu.org> ---
> https://gcc.gnu.org/install/prerequisites.html needs an update then: it still
> refers to isl 0.15.
Yeah, that's the version that also "works" but given testcases behave
differently with different ISL versions I have to chose a version
to match them up with...
> contrib/download_prerequisites fetches 0.18, and it is available on
> ftp://gcc.gnu.org/pub/gcc/infrastructure/
Yes.
>From gcc-bugs-return-583576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 12:02:31 2017
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Subject: [Bug tree-optimization/83216] [8 regression] FAIL: gcc.dg/graphite/interchange-3.c
Date: Thu, 30 Nov 2017 12:02:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WORKSFORME
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
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--- Comment #11 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 30 Nov 2017, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83219
>
> --- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Created attachment 42751
> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42751&action=edit
> gcc8-pr83219.patch
>
> Untested fix.
works for me.
>From gcc-bugs-return-583579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 12:06:56 2017
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From: "rainer@emrich-ebersheim.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/81470] [8 Regression] Bootstrap comparison failures in gcc/ada
Date: Thu, 30 Nov 2017 12:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81470
--- Comment #12 from Rainer Emrich <rainer@emrich-ebersheim.de> ---
(In reply to Olivier Hainque from comment #11)
> Comment on attachment 42747 [details]
> don't emit .cfi_personality/.cfi_lsda for !dwarf2 eh
>
> >diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
> >index 3d619b8..62b5c77 100644
> >--- a/gcc/dwarf2out.c
> >+++ b/gcc/dwarf2out.c
> >@@ -958,10 +958,16 @@ dwarf2out_do_cfi_startproc (bool second)
> > {
> > int enc;
> > rtx ref;
> >- rtx personality = get_personality_function (current_function_decl);
> >
> > fprintf (asm_out_file, "\t.cfi_startproc\n");
> >
> >+ /* .cfi_personality and .cfi_lsda are only relevant to DWARF2
> >+ eh unwinders. */
> >+ if (targetm_common.except_unwind_info (&global_options) != UI_DWARF2)
> >+ return;
> >+
> >+ rtx personality = get_personality_function (current_function_decl);
> >+
> > if (personality)
> > {
> > enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, /*global=*/1);
Confirmed, this patch solves the issue.
Thanks
>From gcc-bugs-return-583580-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 12:22:56 2017
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Subject: [Bug target/83156] [8 regression] gcc.target/i386/pr82361-1.c fail
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-583581-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 12:24:03 2017
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Subject: [Bug libstdc++/21549] Configure options hard to find
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
The issue of undocumented configure options also came up in bug 82824, although
that was a tangent so I won't add it under "See Also"
(In reply to Benjamin Kosnik from comment #3)
>
> As an aside, are a lot of these java config opts actually still relevant?
>
> -benjamin
No, java has been removed.
>From gcc-bugs-return-583583-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 12:49:33 2017
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Subject: [Bug c++/83226] [7/8 Regression] std::map with reference T breaks in C++17 mode
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-11-30
Known to work| |6.4.0
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Summary|[7 Regression] std::map |[7/8 Regression] std::map
|with reference T breaks in |with reference T breaks in
|C++17 mode |C++17 mode
Ever confirmed|0 |1
>From gcc-bugs-return-583582-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 12:49:08 2017
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Subject: [Bug fortran/82622] [PDT] ICE in structure_alloc_comps, at fortran/trans-array.c:8963
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
I have just submitted a complete fix to the list, including the problem in
comment #1.
Paul
>From gcc-bugs-return-583584-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 12:52:58 2017
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Subject: [Bug c/83222] [8 regression] Inconsistent "initializer element is not constant" error
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Well, even GCC 7 and older were doing it, but only with -O1 and above.
>From gcc-bugs-return-583585-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 12:57:55 2017
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Subject: [Bug c/83222] [8 regression] Inconsistent "initializer element is not constant" error
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42752
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42752&action=edit
gcc8-pr83222.patch
Perhaps we can do something like this and in initializers try to behave more
consistently even when outside of functions. Or in the other direction, handle
static var initializers even in functions like those outside of functions.
>From gcc-bugs-return-583586-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 13:01:51 2017
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From: "sgunderson at bigfoot dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83227] New: [7 Regression] internal compiler error: in process_init_constructor_array
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Bug ID: 83227
Summary: [7 Regression] internal compiler error: in
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Product: gcc
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I believe this is distinct from #82593, so I'm filing it as a separate bug.
The following test program dies with GCC 7.2.0 with -std=c++17:
#include <initializer_list>
#include <vector>
struct Direction {
Direction() {}
};
struct Front_back : public Direction {
Front_back() : Direction() {}
};
void foo(const std::vector<Direction> &elements);
void bar() {
foo({ Front_back{} });
}
test.cc: In function ‘void bar()’:
test.cc:15:23: internal compiler error: in process_init_constructor_array, at
cp/typeck2.c:1308
foo({ Front_back{} });
^
Please submit a full bug report,
with preprocessed source if appropriate.
It works with GCC 6.4.0, and also with -std=c++14. It's still there in the
20171109 snapshot.
Reduced preprocessed case:
namespace std {
template <class a> class initializer_list {
const a *b;
unsigned long c;
};
struct e {
e(int);
};
template <typename d> class f : e {
public:
f(initializer_list<d>, int g = int()) : e(g) {}
};
}
struct h {};
struct i : h {
i();
};
void foo(std::f<h>) { foo({i{}}); }
>From gcc-bugs-return-583587-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 13:35:13 2017
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Subject: [Bug c++/83204] [6/7/8 Regression] c++ -std=c++14 ICE in maybe_undo_parenthesized_ref, at cp/semantics.c:1694
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-30
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r236616.
I think this is related to maybe_undo_parenthesized_ref relying on
REF_PARENTHESIZED_P operands being in a certain form, which is what
force_paren_expr creates. But in pt.c we have:
tree r = RECUR (TREE_OPERAND (t, 0));
if (REFERENCE_REF_P (t))
{
/* A type conversion to reference type will be enclosed in
such an indirect ref, but the substitution of the cast
will have also added such an indirect ref. */
r = convert_from_reference (r);
}
else
r = build_x_indirect_ref (input_location, r, RO_UNARY_STAR,
complain|decltype_flag);
if (TREE_CODE (r) == INDIRECT_REF)
REF_PARENTHESIZED_P (r) = REF_PARENTHESIZED_P (t);
where we copy over the bit, even when the tsubsted operand might be completely
different. So should maybe_undo_parenthesized_ref be able to cope with any
other form (and how), or should we not set REF_PARENTHESIZED_P if the form of
r's operands no longer matches, something else?
>From gcc-bugs-return-583588-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 13:40:50 2017
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Subject: [Bug target/83203] [8 Regression] Inefficient int to avx2 vector conversion
Date: Thu, 30 Nov 2017 13:40:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Broken with r254548.
Self-contained testcase:
typedef long long V __attribute__((vector_size (32)));
V
foo (long long x)
{
return (V) { x };
}
I'll have a look.
>From gcc-bugs-return-583589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 13:46:18 2017
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Subject: [Bug c++/83226] [7/8 Regression] std::map with reference T breaks in C++17 mode
Date: Thu, 30 Nov 2017 13:46:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Nov 30 13:45:37 2017
New Revision: 255271
URL: https://gcc.gnu.org/viewcvs?rev=255271&root=gcc&view=rev
Log:
PR libstdc++/83226 avoid forming pointer-to-reference type
PR libstdc++/83226
* include/bits/node_handle.h (_Node_handle::__pointer): Avoid forming
pointer-to-reference types.
* testsuite/23_containers/map/modifiers/insert/83226.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/23_containers/map/modifiers/insert/83226.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/node_handle.h
>From gcc-bugs-return-583590-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 13:48:44 2017
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Subject: [Bug fortran/83224] creating character array from elements shorter than declared does not pad with whitespace properly and aborts
Date: Thu, 30 Nov 2017 13:48:00 -0000
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--- Comment #2 from urbanjost at comcast dot net ---
Thanks for checking on this so quickly. I did not reduce my example any further
than I did because it would just print without padding with blanks the way I
expected and not abort if I made it shorter; using your reduced test and just
trying a few times I see that the abort occurs when the new length is 9 and the
previous length was 8 or less. I added back a few lines to demonstrate just in
case that is significant, maybe a second problem (ignore otherwise)?
[one ][two ][three]
[GOT HERE][onetwtwo][twoththr][threethr][three ]
Program received signal SIGABRT: Process abort signal.
Backtrace for this error:
JSU@buzz ~
$ cat yyy.f90
program dusty_corner ! exercise f2008 CHARACTER features
implicit none
character(len=:),allocatable :: words(:)
character(len=:),allocatable :: words1(:), words2(:)
words1=[character(len=3) :: 'one', 'two']
words2=[character(len=5) :: words1, 'three']
write(*,'(5("[",a,"]":))')words2
words=[character(len=3) :: 'one', 'two']
words=[character(len=5) :: words, 'three']
words=[character(len=8) :: words, 'three'] ! ADD: ok with len=8
write(*,'(5("[",a,"]":))')'GOT HERE',words ! ADD: keeps going
words=[character(len=9) :: words, 'three'] ! ADD: actually crashes
write(*,'(5("[",a,"]":))')'DID NOT GET HERE',words ! ADD:
end program dusty_corner
>From gcc-bugs-return-583591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 13:50:01 2017
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Subject: [Bug middle-end/83228] New: Remove optimistic assumptions about atomic ops in optab.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83228
Bug ID: 83228
Summary: Remove optimistic assumptions about atomic ops in
optab.c
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Target Milestone: ---
There are a number of assumptions in optabs.c:
...
diff --git a/gcc/optabs.c b/gcc/optabs.c
index 48e37f8..7f6f9f1 100644
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -6079,6 +6079,7 @@ expand_atomic_test_and_set (rtx target, rtx mem, enum
memmodel model)
/* Failing all else, assume a single threaded environment and simply
perform the operation. */
if (!ret)
{
/* If the result is ignored skip the move to target. */
@@ -6358,6 +6359,7 @@ expand_atomic_load (rtx target, rtx mem, enum memmodel
model)
return NULL_RTX;
/* Otherwise assume loads are atomic, and emit the proper barriers. */
if (!target || target == const0_rtx)
target = gen_reg_rtx (mode);
@@ -6438,6 +6440,7 @@ expand_atomic_store (rtx mem, rtx val, enum memmodel
model, bool use_release)
}
/* Otherwise assume stores are atomic, and emit the proper barriers. */
expand_mem_thread_fence (model);
emit_move_insn (mem, val);
...
The assumptions make sense from the point of view of a target that is complete
and working: if say, the atomic load expansion is missing, it's because the
target intends to use the fallback, because regular loads are atomic.
But during a target bringup for a target where loads are not atomic, the
expansion might be missing because it's not done yet, in which case the
fallback silently gives the wrong answer, while it would be more helpful for
the compiler to ICE at that point, indicating that some support is missing.
So, in these cases we want to ICE by default, unless the target tells us to use
the fallback.
>From gcc-bugs-return-583592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 13:55:51 2017
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Subject: [Bug c++/83226] [7 Regression] std::map with reference T breaks in C++17 mode
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.0
Target Milestone|--- |7.3
Summary|[7/8 Regression] std::map |[7 Regression] std::map
|with reference T breaks in |with reference T breaks in
|C++17 mode |C++17 mode
Known to fail| |7.2.0
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk so far.
>From gcc-bugs-return-583593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 14:08:46 2017
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Subject: [Bug target/83203] [8 Regression] Inefficient int to avx2 vector conversion
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org,
| |uros at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, the above mentioned change optimizes during cse1:
(insn 8 7 9 2 (set (reg:V2DI 91)
(vec_merge:V2DI (vec_duplicate:V2DI (reg/v:DI 88 [ x ]))
(reg:V2DI 91)
(const_int 1 [0x1]))) "pr83203.c":6 3655 {sse4_1_pinsrq}
(expr_list:REG_DEAD (reg/v:DI 88 [ x ])
(nil)))
to:
(insn 8 7 9 2 (set (reg:V2DI 91)
(vec_concat:V2DI (reg/v:DI 88 [ x ])
(const_int 0 [0]))) "pr83203.c":6 3738 {vec_concatv2di}
(expr_list:REG_DEAD (reg/v:DI 88 [ x ])
(nil)))
as pseudo 91 contains all zeros.
Now, because this is generic tuning we force that into stack.
Though I must repeat for the nth time that this is very confusing; either for
some AMD chips (is it really that bad in contemporary ones) vmovd is way too
expensive, but then either vpinsrq is also too expensive (in that case we
should be happy we emit what we do now on the trunk; but then
<sse2p4_1>_pinsr<ssemodesuffix> should use Yi instead of x or v in alternatives
with r input; and similarly use Yi in vec_concatv2di in the vpinsrq and pinsrq
alternatives), or vmovd is expensive, but vpinsrq is not, then we just should
use vpinsrq for the vec_concatv2di pattern,
(i.e. add alternative for =x,r,C which will split into clearing the destination
plus vpinsrq).
Another thing is that with -O2 -mavx2 -mtune=intel we emit:
vmovq %rdi, %xmm0
vmovdqa %xmm0, %xmm0
ret
when we could just emit
vmovq %rdi, %xmm0
I think. I guess we'd need a pattern for combine that would match what
combiner's trying:
(set (reg:V4DI 90)
(vec_concat:V4DI (vec_concat:V2DI (reg/v:DI 88 [ x ])
(const_int 0 [0]))
(const_vector:V2DI [
(const_int 0 [0])
(const_int 0 [0])
])))
and perhaps simplify that into something different - vec_select from all zeros
and vec_duplicate, so that we don't need to list all weird cases?
Though perhaps the r254548 change goes here in the wrong direction.
>From gcc-bugs-return-583594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 14:16:56 2017
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--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #3)
> Now, because this is generic tuning we force that into stack.
> Though I must repeat for the nth time that this is very confusing; either
> for some AMD chips (is it really that bad in contemporary ones) vmovd is way
> too expensive, but then either vpinsrq is also too expensive (in that case
> we should be happy we emit what we do now on the trunk; but then
> <sse2p4_1>_pinsr<ssemodesuffix> should use Yi instead of x or v in
> alternatives with r input; and similarly use Yi in vec_concatv2di in the
> vpinsrq and pinsrq alternatives), or vmovd is expensive, but vpinsrq is not,
> then we just should use vpinsrq for the vec_concatv2di pattern,
> (i.e. add alternative for =x,r,C which will split into clearing the
> destination plus vpinsrq).
AFAICT, pinsr is expensive either with memory or with register operand. Some
time ago, the idea of mine was to implement missing direct SImode and DImode
moves for AMD targets with "pinsr $0, ..." and "pextr $0, ...", but the idea
was scrapped since these insns were worse than moving the value through memory.
> Another thing is that with -O2 -mavx2 -mtune=intel we emit:
> vmovq %rdi, %xmm0
> vmovdqa %xmm0, %xmm0
> ret
> when we could just emit
> vmovq %rdi, %xmm0
> I think. I guess we'd need a pattern for combine that would match what
> combiner's trying:
> (set (reg:V4DI 90)
> (vec_concat:V4DI (vec_concat:V2DI (reg/v:DI 88 [ x ])
> (const_int 0 [0]))
> (const_vector:V2DI [
> (const_int 0 [0])
> (const_int 0 [0])
> ])))
> and perhaps simplify that into something different - vec_select from all
> zeros and vec_duplicate, so that we don't need to list all weird cases?
> Though perhaps the r254548 change goes here in the wrong direction.
Maybe we can handle these in the middle end in some generic way, especially
when combination simplifies to a simple move.
>From gcc-bugs-return-583595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 14:24:38 2017
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Subject: [Bug target/83203] [8 Regression] Inefficient int to avx2 vector conversion
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--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
Also, please note that in the past, new instructions from ISA n+1 were just
bolted to existing patterns without much thought, under assumption that the new
instructions are always faster than the old ones.
>From gcc-bugs-return-583596-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 14:46:37 2017
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Subject: [Bug c++/83217] Compiler segfault: structured binding by reference to a templated type via a pointer
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42753
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42753&action=edit
gcc8-pr83217.patch
Untested fix.
>From gcc-bugs-return-583597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 15:28:20 2017
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Subject: [Bug tree-optimization/83221] [8 Regression] qsort comparator not anti-commutative: -2147483648, -2147483648
Date: Thu, 30 Nov 2017 15:28:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The problem is that the testcase contains more than 32768 basic blocks.
One way to fix it is:
2017-11-30 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/83221
* tree-ssa-reassoc.c (sort_by_operand_rank): Shift bb_rank
down by 16.
(init_reassoc): Formatting fix.
--- gcc/tree-ssa-reassoc.c.jj 2017-10-28 09:00:48.000000000 +0200
+++ gcc/tree-ssa-reassoc.c 2017-11-30 16:07:47.220334364 +0100
@@ -543,7 +543,7 @@ sort_by_operand_rank (const void *pa, co
return -1;
/* If neither is, compare bb_rank. */
if (bb_rank[bbb->index] != bb_rank[bba->index])
- return bb_rank[bbb->index] - bb_rank[bba->index];
+ return (bb_rank[bbb->index] >> 16) - (bb_rank[bba->index] >> 16);
}
bool da = reassoc_stmt_dominates_stmt_p (stmta, stmtb);
@@ -6131,7 +6131,7 @@ init_reassoc (void)
/* Set up rank for each BB */
for (i = 0; i < n_basic_blocks_for_fn (cfun) - NUM_FIXED_BLOCKS; i++)
- bb_rank[bbs[i]] = ++rank << 16;
+ bb_rank[bbs[i]] = ++rank << 16;
free (bbs);
calculate_dominance_info (CDI_POST_DOMINATORS);
Another possibility is to store bb_rank unshifted and shift only when using
bb_rank
except for this sort_by_operand_rank spot.
Perhaps the best fix is to change the types of all the ranks from unsigned int
(used in some spots) and long (in other spots) to uint64_t, on 64-bit hosts it
shouldn't make much difference if we say reorder:
struct operand_entry
{
unsigned int rank;
unsigned int id;
tree op;
unsigned int count;
gimple *stmt_to_insert;
};
to
struct operand_entry
{
unsigned int count;
unsigned int id;
tree op;
uint64_t rank;
gimple *stmt_to_insert;
};
Guess
static int
compare_repeat_factors (const void *x1, const void *x2)
{
const repeat_factor *rf1 = (const repeat_factor *) x1;
const repeat_factor *rf2 = (const repeat_factor *) x2;
if (rf1->count != rf2->count)
return rf1->count - rf2->count;
return rf2->rank - rf1->rank;
}
should be changed in any case to do:
if (rf1->rank != rf2->rank)
return rf2->rank > rf1->rank ? 1 : -1;
return 0;
and likely also the count case.
Richard, thoughts on this?
>From gcc-bugs-return-583598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 15:34:08 2017
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Subject: [Bug libstdc++/50871] libstdc++ should be built with -Wpedantic and/or -Wsystem-headers
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--- Comment #13 from Jason Merrill <jason at gcc dot gnu.org> ---
Created attachment 42754
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patch to add -Weh-mismatch to handle this case
Since the main concern seems to be EH mismatch, how about this?
>From gcc-bugs-return-583599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 15:37:14 2017
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Subject: [Bug c/76732] Improve Woverride-init
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Rainer Orth <ro at gcc dot gnu.org> changed:
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--- Comment #8 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 42755
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42755&action=edit
different testcase
I've been pointed at the attached testcase.
With Oracle Studio cc, I get
ptr_a = hello
ptr_b = (null)
ptr_c = goodbye
while both gcc and clang produce
ptr_a = (null)
ptr_b = (null)
ptr_c = goodbye
It seems Studio cc is wrong according to C11 6.7.9 par. 19. However clang
warns
by default
union.c:40:3: warning: initializer overrides prior initialization of this
subobject [-Winitializer-overrides]
.ptr_c = "goodbye"
^~~~~
union.c:36:21: note: expanded from macro 'ptr_c'
#define ptr_c ops_u.ops_v2.v2_c
~^~~~~~
union.c:39:3: note: previous initialization is here
.ptr_a = "hello",
^~~~~~~~~~~~~~~
union.c:34:27: note: expanded from macro 'ptr_a'
#define ptr_a ops_u.ops_v1.v1_a
^
1 warning generated.
even withou any additional options, which gcc 8.0.0 doesn't even with -Wall
-Woverride-init.
Seems gcc should really follow here.
>From gcc-bugs-return-583600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 16:05:54 2017
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Subject: [Bug c++/83227] [7/8 Regression] internal compiler error: in process_init_constructor_array
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Target Milestone|--- |7.3
Summary|[7 Regression] internal |[7/8 Regression] internal
|compiler error: in |compiler error: in
|process_init_constructor_ar |process_init_constructor_ar
|ray |ray
>From gcc-bugs-return-583601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 16:08:06 2017
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Subject: [Bug ipa/83229] New: [8 Regression] ICE in from_gcov_type, at profile-count.h:676
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83229
Bug ID: 83229
Summary: [8 Regression] ICE in from_gcov_type, at
profile-count.h:676
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
gamess fails to build with the following (Haswell, thus arch=core-avx2)
/space/rguenther/install/usr/local/bin/gfortran -c -o hss1a.fppized.o -Ofast
-march=native -Wl,-rpath=/space/rguenther/install/usr/local/lib64
-DSPEC_CPU_LP64 -ffixed-form -std=legacy hss1a.fppized.f
...
during IPA pass: inline
hss1a.fppized.f:142:0:
SUBROUTINE HLFSPD(EG,EH,DAB,FD,FDD,BFDD,OUT)
internal compiler error: in from_gcov_type, at profile-count.h:676
0xbdcf3f profile_count::from_gcov_type(long)
/space/rguenther/src/svn/trunk/gcc/profile-count.h:676
0xbdcf3f estimate_bb_frequencies(bool)
/space/rguenther/src/svn/trunk/gcc/predict.c:3623
0xbdd367 rebuild_frequencies()
/space/rguenther/src/svn/trunk/gcc/predict.c:3911
0xbbc954 execute_function_todo
/space/rguenther/src/svn/trunk/gcc/passes.c:1975
0xbbd2e5 execute_todo
/space/rguenther/src/svn/trunk/gcc/passes.c:2048
0xbbf769 execute_one_ipa_transform_pass
/space/rguenther/src/svn/trunk/gcc/passes.c:2245
0xbbf769 execute_all_ipa_transforms()
/space/rguenther/src/svn/trunk/gcc/passes.c:2281
0x86d097 cgraph_node::expand()
/space/rguenther/src/svn/trunk/gcc/cgraphunit.c:2132
0x86e911 expand_all_functions
/space/rguenther/src/svn/trunk/gcc/cgraphunit.c:2275
0x86e911 symbol_table::compile()
/space/rguenther/src/svn/trunk/gcc/cgraphunit.c:2623
0x870c24 symbol_table::finalize_compilation_unit()
/space/rguenther/src/svn/trunk/gcc/cgraphunit.c:2716
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
specmake: *** [hss1a.fppized.o] Error 1
specmake: *** Waiting for unfinished jobs....
>From gcc-bugs-return-583602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 16:08:25 2017
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Subject: [Bug ipa/83229] [8 Regression] ICE in from_gcov_type, at profile-count.h:676
Date: Thu, 30 Nov 2017 16:08:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
Target Milestone|--- |8.0
>From gcc-bugs-return-583603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 16:24:25 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83203] [8 Regression] Inefficient int to avx2 vector conversion
Date: Thu, 30 Nov 2017 16:24:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
A general comment from my side here is that RTL really has too many ways to
express vector "combinations" / "shuffles". In particular vec_merge can
be expressed (up to the CONST_INT bitmask limit to 128 vector elements...)
as (vec_select (vec_concat (...)). vec_merge has the advantage of not
requiring the intermediate larger vector mode vec_concat requires.
-> vec_perm to the rescue...
but that requires changing all targets & patterns.
The difficulty is that different targets perfer different variants
(vec_merge vs. select/concat), so generic simplifications are very
difficult to "tune".
Eventually combine needs to learn the equivalence between vec_merge
and select/concat and try "both"?
Or we need to declare vec_merge as canonical when the bitmask is large
enough (and fix all targets for that). Though in my view the
select vector is easier to read in .md than the bitmask as integer...
>From gcc-bugs-return-583604-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 16:32:47 2017
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Subject: [Bug ipa/83178] [8 regression] g++.dg/ipa/devirt-22.C fail
Date: Thu, 30 Nov 2017 16:32:00 -0000
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seurer at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |seurer at gcc dot gnu.org
--- Comment #2 from seurer at gcc dot gnu.org ---
Also on powerpc64 both BE and LE.
>From gcc-bugs-return-583605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 16:42:09 2017
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Subject: [Bug libstdc++/65927] cppcheck: bits/locale_facets_nonio.h (_M_am_pm_format): Assignment of function parameter has no effect outside the function
Date: Thu, 30 Nov 2017 16:42:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is exported, so we can't remove it or change it. Sigh.
>From gcc-bugs-return-583607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 16:51:25 2017
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/69811] [6/7/8 Regression] GCC does not simplify 0 == "a"+1 at -O0
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Jeffrey A. Law <law at redhat dot com> changed:
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Status|NEW |RESOLVED
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--- Comment #10 from Jeffrey A. Law <law at redhat dot com> ---
This was actually fixed in gcc-7.
>From gcc-bugs-return-583606-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 16:51:19 2017
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Subject: [Bug c/79153] -Wimplicit-fallthrough missed warning
Date: Thu, 30 Nov 2017 16:51:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This isn't really that easy, because what we end up with in the IL that Marek's
infrastructure looks at is for switches that may fall through (i.e. ones which
have either a break; stmt or missing default) is just a GIMPLE_LABEL created
for the LABEL_EXPR added already in the FEs, or the:
if (!default_case)
{
glabel *new_default;
default_case
= build_case_label (NULL_TREE, NULL_TREE,
create_artificial_label (UNKNOWN_LOCATION));
new_default = gimple_build_label (CASE_LABEL (default_case));
gimplify_seq_add_stmt (&switch_body_seq, new_default);
}
added GIMPLE_LABEL, then lots of stmts in between and finally some
GIMPLE_SWITCH.
So, I think the gimplify.c fallthrough code needs to be told what GIMPLE_LABEL
stmts are the break labels or default case labels and for diagnostics it would
be nice if it could be possible to query the locus of the corresponding switch
stmt and then treat a GIMPLE_LABEL with that special flag just as a statement
that can fall through with the location of the corresponding GIMPLE_SWITCH.
Finding an available bit on LABEL_DECL should be easy, e.g. protected_flag
doesn't seem to be occupied. As for location, not really sure what code cares
about gimple_location of GIMPLE_LABEL / EXPR_LOCATION of LABEL_EXPR and what
code cares about DECL_LOCATION of a LABEL_DECL and if we could reuse one or the
other to hold the location of the switch, without e.g. the debugger jumping on
back to the switch when we do a break.
>From gcc-bugs-return-583608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 16:56:29 2017
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Subject: [Bug target/80700] [7/8 Regression] ICE: Bus error (on SPE target)
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Jeffrey A. Law <law at redhat dot com> changed:
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CC| |law at redhat dot com
>From gcc-bugs-return-583609-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 16:57:36 2017
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Subject: [Bug c++/82219] [8 Regression] Not wanted warning: "type qualifiers ignored on cast result type" on template instantiation
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Jason Merrill <jason at gcc dot gnu.org> changed:
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Subject: [Bug fortran/82720] [PDT] ICE in gfc_conv_component_ref, at fortran/trans-expr.c:2400
Date: Thu, 30 Nov 2017 17:02:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
I have a fix for this that is combined with that for PR82719. I will post it on
that PR.
Paul
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Subject: [Bug fortran/82258] [8 regression] allocate_zerosize_3.f fails since r251949
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Jeffrey A. Law <law at redhat dot com> changed:
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Subject: [Bug jit/82846] [8 regression] jit.dg test-alignment.c.exe, test-combination.c.exe, test-threads.c.exe fails
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Jeffrey A. Law <law at redhat dot com> changed:
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>From gcc-bugs-return-583613-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 17:20:28 2017
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Subject: [Bug fortran/82719] [PDT] ICE in transfer_expr, at fortran/trans-io.c:2393
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 42756
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42756&action=edit
Patch for PRs 82605/606/622/719/720
I am a bit to busy to separate all the different fixes and so here is a
composite:
2017-11-30 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* resolve.c (get_pdt_constructor): Initialize 'cons' to NULL.
(resolve_pdt): Correct typo in prior comment. Emit an error if
any parameters are deferred and the object is neither pointer
nor allocatable.
PR fortran/82606
* decl.c (gfc_get_pdt_instance): Continue if the parameter sym
is not present or has no name. Select the parameter by name
of component, rather than component order. Remove all the other
manipulations of 'tail' when building the pdt instance.
(gfc_match_formal_arglist): Emit and error if a star is picked
up in a PDT decl parameter list.
PR fortran/82622
* trans-array.c (set_loop_bounds): If a GFC_SS_COMPONENT has an
info->end, use it rather than falling through to
gcc_unreachable.
(structure_alloc_comps): Check that param->name is non-null
before comparing with the component name.
* trans-decl.c (gfc_get_symbol_decl): Do not use the static
initializer for PDT symbols.
(gfc_init_default_dt): Do nothing for PDT symbols.
* trans-io.c (transfer_array_component): Parameterized array
components use the descriptor ubound since the shape is not
available.
PR fortran/82719
PR fortran/82720
* trans-expr.c (gfc_conv_component_ref): Do not use the charlen
backend_decl of pdt strings. Use the hidden component instead.
* trans-io.c (transfer_expr): Do not do IO on "hidden" string
lengths. Use the hidden string length for pdt string transfers
by adding it to the se structure. When finished nullify the
se string length.
2017-11-30 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* gfortran.dg/pdt_4.f03 : Incorporate the new error.
PR fortran/82606
* gfortran.dg/pdt_19.f03 : New test.
* gfortran.dg/pdt_21.f03 : New test.
PR fortran/82622
* gfortran.dg/pdt_20.f03 : New test.
* gfortran.dg/pdt_22.f03 : New test.
PR fortran/82719
PR fortran/82720
* gfortran.dg/pdt_23.f03 : New test.
Paul
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Subject: [Bug libstdc++/65927] cppcheck: bits/locale_facets_nonio.h (_M_am_pm_format): Assignment of function parameter has no effect outside the function
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Nov 30 17:29:08 2017
New Revision: 255278
URL: https://gcc.gnu.org/viewcvs?rev=255278&root=gcc&view=rev
Log:
PR libstdc++/65927 Fix -Wunused-but-set-parameter warning
PR libstdc++/65927
* include/bits/locale_facets_nonio.h (__timepunct::_M_am_pm_format):
Remove statement with no effect.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/locale_facets_nonio.h
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Subject: [Bug libstdc++/65927] cppcheck: bits/locale_facets_nonio.h (_M_am_pm_format): Assignment of function parameter has no effect outside the function
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for gcc-8
>From gcc-bugs-return-583616-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 17:34:46 2017
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Subject: [Bug ipa/83179] [8 regression] gcc.dg/ipa/inline-1.c fail
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seurer at gcc dot gnu.org changed:
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--- Comment #9 from seurer at gcc dot gnu.org ---
Also on powerpc64 both BE and LE
>From gcc-bugs-return-583617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 17:36:11 2017
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83230] New: [8.0 regression] segmentation fault in bind C C/C++
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Bug ID: 83230
Summary: [8.0 regression] segmentation fault in bind C C/C++
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: juergen.reuter at desy dot de
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Created attachment 42757
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42757&action=edit
Reproducer
The following code seg faults in the most recent versions for gcc/g++/gfortran,
cf. below. I'm using the gcc trunk 255190 with the patch in
https://gcc.gnu.org/viewcvs/gcc/branches/gcc-7-branch/gcc/fortran/resolve.c?r1=255029&r2=255205&pathrev=255205
applied. The C++ code which I adapted here and linked into my Fortran program
works standalone with that version of gcc/g++, but the bind(C) fails. I'm not
sure whether this an error (or simply a change in the C/C++ API) or whether
something in bind(C) broke. The C++ code contains an implementation for an XDR
reader, which is applied from a Fortran program via bind(C) to read in the file
eio_stdhep_1.hep which is also attached. If this is in bind(C) it could be
related https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83225
at least it happened relatively close to the commit causing that bug.
$ ./rt_error
writing stdhep event ...
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
#0 0x7fcfa0029caf in ???
#1 0x7fcfa007613c in ???
#2 0x7fcfa1071c05 in _ZN9__gnu_cxx13new_allocatorIcE10deallocateEPcm
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/ext/new_allocator.h:125
#3 0x7fcfa1071c05 in _ZNSt16allocator_traitsISaIcEE10deallocateERS0_Pcm
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/alloc_traits.h:462
#4 0x7fcfa1071c05 in
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE10_M_destroyEm
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:226
#5 0x7fcfa1071c05 in
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE10_M_disposeEv
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:221
#6 0x7fcfa1071c05 in _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED4Ev
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:647
#7 0x7fcfa1071c05 in
_ZNSt7__cxx1115basic_stringbufIcSt11char_traitsIcESaIcEED4Ev
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/sstream:65
#8 0x7fcfa1071c05 in
_ZNSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEED1Ev
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/sstream:732
#9 0x407b56 in ???
#10 0x406c1d in ???
#11 0x408485 in ???
#12 0x408519 in ???
#13 0x4085f8 in ???
#14 0x40862e in ???
#15 0x7fcfa0014f44 in ???
#16 0x401918 in ???
#17 0xffffffffffffffff in ???
Segmentation fault (core dumped)
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Subject: [Bug c++/82219] [8 Regression] Not wanted warning: "type qualifiers ignored on cast result type" on template instantiation
Date: Thu, 30 Nov 2017 17:43:00 -0000
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Nov 30 17:43:08 2017
New Revision: 255279
URL: https://gcc.gnu.org/viewcvs?rev=255279&root=gcc&view=rev
Log:
PR c++/82219 - bogus -Wignored-qualifiers with template
* pt.c (tsubst_copy_and_build) [STATIC_CAST_EXPR]: Suppress
-Wignored-qualifiers.
Added:
trunk/gcc/testsuite/g++.dg/warn/Wignored-qualifiers1.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
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Subject: [Bug middle-end/83069] [8 Regression] internal compiler error: in from_gcov_type, at profile-count.h:676
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #15 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
*** Bug 83229 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-583620-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 17:44:23 2017
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Subject: [Bug ipa/83229] [8 Regression] ICE in from_gcov_type, at profile-count.h:676
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 83069 ***
>From gcc-bugs-return-583619-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 17:44:20 2017
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Subject: [Bug c++/82219] [8 Regression] Not wanted warning: "type qualifiers ignored on cast result type" on template instantiation
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-583622-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 18:06:23 2017
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Subject: [Bug c++/83231] New: ICE on constexpr evaluation
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Bug ID: 83231
Summary: ICE on constexpr evaluation
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Following valid example
struct GUID {
unsigned long Data1;
unsigned char Data2[ 4 ];
};
constexpr bool is_equal(GUID lhs, GUID rhs) {
return lhs.Data1 == rhs.Data1
&& lhs.Data2[0] == rhs.Data2[0] && lhs.Data2[1] == rhs.Data2[1];
}
void guid_tests() {
constexpr GUID some_guid =
{ 0x3bcac5a9, { 0xb5, 0xc5, 0xb1, 0x9b } };
constexpr bool val = is_equal(some_guid, some_guid);
}
fails to cimpile and produces error message:
<source>: In function 'void guid_tests()':
14 : <source>:14:34: in 'constexpr' expansion of 'is_equal(some_guid,
some_guid)'
14 : <source>:14:55: internal compiler error: in cxx_eval_bit_field_ref, at
cp/constexpr.c:2608
constexpr bool val = is_equal(some_guid, some_guid);
^
mmap: Cannot allocate memory
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler exited with result code 1
Build flags: --std=c++14 -O2
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Subject: [Bug libstdc++/50871] libstdc++ should be built with -Wpedantic and/or -Wsystem-headers
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--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's better than what we have today, but I'm not sure it's where we want to get
to in the long term.
I've been trying a patch that allows the system_header pragma to be disabled
when building and testing. This causes testsuite failures due to warnings that
can't be controlled by options or diagnostic pragmas:
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/cmath:47:
error: #include_next is a GCC extension
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/std_abs.h:40:
error: #include_next is a GCC extension
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/cstdlib:77:
error: #include_next is a GCC extension
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/cmath:47:
error: #include_next is a GCC extension
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/fenv.h:38:
error: #include_next is a GCC extension
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/cmath:47:
error: #include_next is a GCC extension
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/cmath:47:
error: #include_next is a GCC extension
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/cmath:47:
error: #include_next is a GCC extension
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/cmath:47:
error: #include_next is a GCC extension
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/cmath:47:
error: #include_next is a GCC extension
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/cmath:47:
error: #include_next is a GCC extension
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/complex:1951:
warning: floating point suffix 'if' shadowed by implementation
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/complex:1959:
warning: floating point suffix 'i' shadowed by implementation
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/complex:1963:
warning: integer suffix 'i' shadowed by implementation
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/complex:1967:
warning: floating point suffix 'il' shadowed by implementation
/home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/complex:1971:
warning: integer suffix 'il' shadowed by implementation
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Subject: [Bug tree-optimization/83232] New: fma3d spec2000 regression on zen with -Ofast (generic tuning) after r255268 by missed SLP oppurtunity
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83232
Bug ID: 83232
Summary: fma3d spec2000 regression on zen with -Ofast (generic
tuning) after r255268 by missed SLP oppurtunity
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: hubicka at gcc dot gnu.org
Target Milestone: ---
r255268 introduced regression on fma3d. This difference pays back in specfp2000
in general but should be tracked (and hopefully fixed).
Compiling with -fdisable-tree-cunroll makes the problem go away. Problem is
that slp vectorizer is confused by presence of unrolled vectorized loop body
and gives up on vectorizing initialization sequence which leads to memory
mismatch stall.
Problem is in material_11.f90 where the loop of material_41_integration is
vectorized in both cases. New code omits vectorization for alignment but it
also introduces partial stores followed by full sized load:
_13 = *stress_203(D)[0];
sinc[0] = _13;
_336 = *stress_203(D)[1];
sinc[1] = _336;
_343 = *stress_203(D)[2];
sinc[2] = _343;
_350 = *stress_203(D)[3];
sinc[3] = _350;
_22 = *dtnext_206(D);
_23 = *dxx_207(D);
_24 = _22 * _23;
einc[0] = _24;
_25 = *dyy_209(D);
_26 = _22 * _25;
einc[1] = _26;
_27 = *dzz_211(D);
_28 = _22 * _27;
einc[2] = _28;
_29 = *dxy_213(D);
_30 = _22 * _29;
einc[3] = _30;
_31 = *dxz_215(D);
_32 = _22 * _31;
einc[4] = _32;
_33 = *dyz_217(D);
_34 = _22 * _33;
einc[5] = _34;
vect_cst__471 = {p3_194, p3_194};
vect__37.58_227 = MEM[(real(kind=8) *)stress_203(D)];
vect__38.61_323 = MEM[(real(kind=8) *)&einc];
vect__39.62_444 = vect__38.61_323 * vect_cst__471;
vect__40.63_443 = vect__37.58_227 + vect__39.62_444;
MEM[(real(kind=8) *)stress_203(D)] = vect__40.63_443;
vect__37.58_432 = MEM[(real(kind=8) *)stress_203(D) + 16B];
vect__38.61_431 = MEM[(real(kind=8) *)&einc + 16B];
vect__39.62_430 = vect__38.61_431 * vect_cst__471;
vect__40.63_429 = vect__39.62_430 + vect__37.58_432;
MEM[(real(kind=8) *)stress_203(D) + 16B] = vect__40.63_429;
vect__37.58_475 = MEM[(real(kind=8) *)stress_203(D) + 32B];
vect__38.61_472 = MEM[(real(kind=8) *)&einc + 32B];
vect__39.62_463 = vect_cst__471 * vect__38.61_472;
vect__40.63_462 = vect__39.62_463 + vect__37.58_475;
MEM[(real(kind=8) *)stress_203(D) + 32B] = vect__40.63_462;
_41 = *stress_203(D)[0];
_342 = _25 + _27;
_44 = _23 + _342;
_8 = _22 * _44;
_45 = _6 * _8;
_46 = _41 + _45;
*stress_203(D)[0] = _46;
_47 = *stress_203(D)[1];
_48 = _45 + _47;
*stress_203(D)[1] = _48;
*stress_203(D)[2] = 0.0;
einc[4] = 0.0;
einc[5] = 0.0;
if (ak_202 == 0.0)
goto <bb 3>; [50.00%]
else
goto <bb 4>; [50.00%]
while old code did:
vect__13.78_205 = MEM[(real(kind=8) *)stress_203(D)];
vect__13.79_445 = MEM[(real(kind=8) *)stress_203(D) + 16B];
MEM[(real(kind=8) *)&sinc] = vect__13.78_205;
MEM[(real(kind=8) *)&sinc + 16B] = vect__13.79_445;
_22 = *dtnext_206(D);
_23 = *dxx_207(D);
_24 = _22 * _23;
_25 = *dyy_209(D);
_26 = _22 * _25;
_27 = *dzz_211(D);
_28 = _22 * _27;
_29 = *dxy_213(D);
_30 = _22 * _29;
_31 = *dxz_215(D);
_32 = _22 * _31;
_33 = *dyz_217(D);
_34 = _22 * _33;
vect_cst__479 = {_32, _34};
vect_cst__482 = {_28, _30};
vect_cst__486 = {_24, _26};
MEM[(real(kind=8) *)&einc] = vect_cst__486;
MEM[(real(kind=8) *)&einc + 16B] = vect_cst__482;
MEM[(real(kind=8) *)&einc + 32B] = vect_cst__479;
_441 = (unsigned long) stress_203(D);
_440 = _441 >> 3;
_439 = -_440;
_438 = (unsigned int) _439;
prolog_loop_niters.57_442 = _438 & 1;
if (prolog_loop_niters.57_442 == 0)
goto <bb 4>; [33.33%]
else
goto <bb 3>; [66.67%]
;; succ: 3 [66.7% (guessed)] count:102291806 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
;; 4 [33.3% (guessed)] count:51145904 (estimated locally)
(TRUE_VALUE,EXECUTABLE)
;; basic block 3, loop depth 0, count 102291806 (estimated locally), maybe
hot
;; prev block 2, next block 4, flags: (NEW, REACHABLE, VISITED)
;; pred: 2 [66.7% (guessed)] count:102291806 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
_471 = MEM[(real(kind=8)[6] *)stress_203(D)];
_463 = einc[0];
_462 = p3_194 * _463;
_461 = _462 + _471;
MEM[(real(kind=8)[6] *)stress_203(D)] = _461;
;; succ: 4 [always] count:102291806 (estimated locally)
(FALLTHRU,EXECUTABLE)
;; basic block 4, loop depth 0, count 153437710 (estimated locally), maybe
hot
;; prev block 3, next block 5, flags: (NEW, REACHABLE, VISITED)
;; pred: 3 [always] count:102291806 (estimated locally)
(FALLTHRU,EXECUTABLE)
;; 2 [33.3% (guessed)] count:51145904 (estimated locally)
(TRUE_VALUE,EXECUTABLE)
# i_435 = PHI <2(3), 1(2)>
prolog_loop_adjusted_niters.58_432 = (sizetype) prolog_loop_niters.57_442;
niters.59_431 = 6 - prolog_loop_niters.57_442;
bnd.60_417 = niters.59_431 >> 1;
_410 = prolog_loop_adjusted_niters.58_432 * 8;
vectp_stress.65_411 = stress_203(D) + _410;
vectp_einc.68_406 = &einc + _410;
vect_cst__401 = {p3_194, p3_194};
vect__37.66_250 = MEM[(real(kind=8) *)vectp_stress.65_411];
vect__38.69_477 = MEM[(real(kind=8) *)vectp_einc.68_406];
vect__39.70_219 = vect_cst__401 * vect__38.69_477;
vect__40.71_227 = vect__39.70_219 + vect__37.66_250;
MEM[(real(kind=8) *)vectp_stress.65_411] = vect__40.71_227;
vect__37.66_382 = MEM[(real(kind=8) *)vectp_stress.65_411 + 16B];
vect__38.69_381 = MEM[(real(kind=8) *)vectp_einc.68_406 + 16B];
vect__39.70_380 = vect__38.69_381 * vect_cst__401;
vect__40.71_379 = vect__39.70_380 + vect__37.66_382;
MEM[(real(kind=8) *)vectp_stress.65_411 + 16B] = vect__40.71_379;
if (bnd.60_417 == 2)
goto <bb 6>; [33.33%]
else
goto <bb 5>; [66.67%]
;; succ: 6 [33.3% (adjusted)] count:51145904 (estimated locally)
(TRUE_VALUE,EXECUTABLE)
;; 5 [66.7% (adjusted)] count:102291806 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
;; basic block 5, loop depth 0, count 68194539 (estimated locally), maybe hot
;; Invalid sum of incoming counts 102291806 (estimated locally), should be
68194539 (estimated locally)
;; prev block 4, next block 6, flags: (NEW, REACHABLE, VISITED)
;; pred: 4 [66.7% (adjusted)] count:102291806 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
vect__37.66_407 = MEM[(real(kind=8) *)vectp_stress.65_411 + 32B];
vect__38.69_402 = MEM[(real(kind=8) *)vectp_einc.68_406 + 32B];
vect__39.70_400 = vect_cst__401 * vect__38.69_402;
vect__40.71_399 = vect__39.70_400 + vect__37.66_407;
MEM[(real(kind=8) *)vectp_stress.65_411 + 32B] = vect__40.71_399;
;; succ: 6 [always (adjusted)] count:68194539 (estimated locally)
(FALLTHRU,EXECUTABLE)
;; basic block 6, loop depth 0, count 153437710 (estimated locally), maybe
hot
;; Invalid sum of incoming counts 119340443 (estimated locally), should be
153437710 (estimated locally)
;; prev block 5, next block 7, flags: (NEW, VISITED)
;; pred: 5 [always (adjusted)] count:68194539 (estimated locally)
(FALLTHRU,EXECUTABLE)
;; 4 [33.3% (adjusted)] count:51145904 (estimated locally)
(TRUE_VALUE,EXECUTABLE)
niters_vector_mult_vf.61_416 = niters.59_431 & 4294967294;
_414 = (integer(kind=4)) niters_vector_mult_vf.61_416;
tmp.62_415 = _414 + i_435;
if (niters_vector_mult_vf.61_416 == niters.59_431)
goto <bb 8>; [33.33%]
else
goto <bb 7>; [66.67%]
;; succ: 7 [66.7% (guessed)] count:102291806 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
;; 8 [33.3% (guessed)] count:51145904 (estimated locally)
(TRUE_VALUE,EXECUTABLE)
;; basic block 7, loop depth 0, count 613536076 (estimated locally), maybe
hot
;; Invalid sum of incoming counts 102291806 (estimated locally), should be
613536076 (estimated locally)
;; prev block 6, next block 8, flags: (NEW, REACHABLE, VISITED)
;; pred: 6 [66.7% (guessed)] count:102291806 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
...
I would say new code is nicer and should run faster if there was no partial
stores.
slp vectorizer has difference when analzing einc:
Relevant difference in SLP vectorizer (old->new) is:
offset alignment: 128
step alignment: 128
base_object: einc[5]
+Creating dr for MEM[(real(kind=8) *)stress_203(D)]
+analyze_innermost: success.
+ base_address: stress_203(D)
+ offset from base address: 0
+ constant offset from base address: 0
+ step: 0
+ base alignment: 8
+ base misalignment: 0
+ offset alignment: 128
+ step alignment: 128
+ base_object: MEM[(real(kind=8) *)stress_203(D)]
+Creating dr for MEM[(real(kind=8) *)&einc]
+analyze_innermost: success.
+ base_address: &einc
+ offset from base address: 0
+ constant offset from base address: 0
+ step: 0
+ base alignment: 16
+ base misalignment: 0
+ offset alignment: 128
+ step alignment: 128
+ base_object: MEM[(real(kind=8) *)&einc]
....
+Creating dr for MEM[(real(kind=8) *)vectp_einc.59_440]
+analyze_innermost: success.
+ base_address: &einc
+ offset from base address: 0
+ constant offset from base address: 16
+ step: 0
+ base alignment: 16
+ base misalignment: 0
+ offset alignment: 128
+ step alignment: 128
+ base_object: MEM[(real(kind=8) *)vectp_einc.59_440]
+Creating dr for MEM[(real(kind=8) *)vectp_stress.64_439]
+analyze_innermost: success.
+ base_address: stress_203(D)
+ offset from base address: 0
+ constant offset from base address: 16
+ step: 0
+ base alignment: 8
+ base misalignment: 0
+ offset alignment: 128
+ step alignment: 128
+ base_object: MEM[(real(kind=8) *)vectp_stress.64_439]
....
+Creating dr for MEM[(real(kind=8) *)vectp_einc.59_426]
+analyze_innermost: success.
+ base_address: &einc
+ offset from base address: 0
+ constant offset from base address: 32
+ step: 0
+ base alignment: 16
+ base misalignment: 0
+ offset alignment: 128
+ step alignment: 128
+ base_object: MEM[(real(kind=8) *)vectp_einc.59_426]
....
+Creating dr for einc[4]
+analyze_innermost: success.
+ base_address: &einc
+ offset from base address: 0
+ constant offset from base address: 32
+ step: 0
+ base alignment: 16
+ base misalignment: 0
+ offset alignment: 128
+ step alignment: 128
+ base_object: einc[4]
+Creating dr for einc[5]
+analyze_innermost: success.
+ base_address: &einc
+ offset from base address: 0
+ constant offset from base address: 40
+ step: 0
+ base alignment: 16
+ base misalignment: 0
+ offset alignment: 128
+ step alignment: 128
+ base_object: einc[5]
I those are from the unrolled vectorized loop body.
+: note: not vectorized: no vectype for stmt: vect__37.58_227 =
MEM[(real(kind=8) *)stress_203(D)];
+ scalar_type: vector(2) real(kind=8)
+: note: not vectorized: no vectype for stmt: vect__38.61_323 =
MEM[(real(kind=8) *)&einc];
+ scalar_type: vector(2) real(kind=8)
+: note: not vectorized: no vectype for stmt: MEM[(real(kind=8)
*)stress_203(D)] = vect__40.63_443;
+ scalar_type: vector(2) real(kind=8)
+: note: not vectorized: no vectype for stmt: vect__37.58_432 =
MEM[(real(kind=8) *)vectp_stress.56_441];
+ scalar_type: vector(2) real(kind=8)
+: note: not vectorized: no vectype for stmt: vect__38.61_431 =
MEM[(real(kind=8) *)vectp_einc.59_440];
+ scalar_type: vector(2) real(kind=8)
+: note: not vectorized: no vectype for stmt: MEM[(real(kind=8)
*)vectp_stress.64_439] = vect__40.63_429;
+ scalar_type: vector(2) real(kind=8)
+: note: not vectorized: no vectype for stmt: vect__37.58_475 =
MEM[(real(kind=8) *)vectp_stress.56_427];
+ scalar_type: vector(2) real(kind=8)
+: note: not vectorized: no vectype for stmt: vect__38.61_472 =
MEM[(real(kind=8) *)vectp_einc.59_426];
+ scalar_type: vector(2) real(kind=8)
+: note: not vectorized: no vectype for stmt: MEM[(real(kind=8)
*)vectp_stress.64_425] = vect__40.63_462;
+ scalar_type: vector(2) real(kind=8)
+: note: got vectype for stmt: _41 = *stress_203(D)[0];
+vector(2) real(kind=8)
+: note: got vectype for stmt: *stress_203(D)[0] = _46;
+vector(2) real(kind=8)
+: note: got vectype for stmt: _47 = *stress_203(D)[1];
+vector(2) real(kind=8)
+: note: got vectype for stmt: *stress_203(D)[1] = _48;
+vector(2) real(kind=8)
+: note: got vectype for stmt: *stress_203(D)[2] = 0.0;
+vector(2) real(kind=8)
+: note: got vectype for stmt: einc[4] = 0.0;
+vector(2) real(kind=8)
+: note: got vectype for stmt: einc[5] = 0.0;
+vector(2) real(kind=8)
: note: === vect_analyze_data_ref_accesses ===
: note: Detected interleaving store einc[0] and einc[1]
: note: Detected interleaving store einc[0] and einc[2]
: note: Detected interleaving store einc[0] and einc[3]
: note: Detected interleaving store einc[0] and einc[4]
-: note: Detected interleaving store einc[0] and einc[5]
+: note: Detected interleaving store einc[4] and einc[5]
: note: Detected interleaving store sinc[0] and sinc[1]
: note: Detected interleaving store sinc[0] and sinc[2]
: note: Detected interleaving store sinc[0] and sinc[3]
@@ -475,9 +683,14 @@
: note: Detected interleaving load MEM[(struct material_type[0:]
*)_1][_5].pval[6] and MEM[(struct material_type[0:] *)_1][_5].pval[15]
: note: Detected interleaving load MEM[(struct material_type[0:]
*)_1][_5].pval[6] and MEM[(struct material_type[0:] *)_1][_5].pval[16]
: note: Detected interleaving load *stress_203(D)[0] and *stress_203(D)[1]
+: note: Detected interleaving load *stress_203(D)[0] and *stress_203(D)[1]
: note: Detected interleaving load *stress_203(D)[0] and *stress_203(D)[2]
: note: Detected interleaving load *stress_203(D)[0] and *stress_203(D)[3]
-: note: Detected interleaving store of size 6 starting with einc[0] = _24;
+: note: Detected interleaving store *stress_203(D)[0] and *stress_203(D)[1]
+: note: Detected interleaving store *stress_203(D)[0] and *stress_203(D)[2]
+: note: Detected interleaving store of size 5 starting with einc[0] = _24;
+: note: Detected interleaving store of size 2 starting with einc[4] = 0.0;
+: note: not consecutive access einc[5] = 0.0;
: note: not consecutive access _1 = material.data;
: note: not consecutive access _2 = material.offset;
: note: not consecutive access p1 = _6;
@@ -486,7 +699,10 @@
: note: Detected interleaving load of size 11 starting with qr_195 =
MEM[(struct material_type[0:] *)_1][_5].pval[6];
: note: not consecutive access _3 = *matid_191(D);
: note: not consecutive access _16 = *efps_201(D);
-: note: Detected interleaving load of size 4 starting with _13 =
*stress_203(D)[0];
+: note: not consecutive access _13 = *stress_203(D)[0];
+: note: Two or more load stmts share the same dr.
+: note: Detected interleaving load of size 4 starting with _41 =
*stress_203(D)[0];
+: note: Detected interleaving store of size 3 starting with *stress_203(D)[0]
= _46;
: note: not consecutive access _22 = *dtnext_206(D);
: note: not consecutive access _23 = *dxx_207(D);
: note: not consecutive access _25 = *dyy_209(D);
: note: vect_is_simple_use: operand _22
: note: def_stmt: _22 = *dtnext_206(D);
: note: type of def: internal
-: note: vect_is_simple_use: operand _441
-: note: def_stmt: _441 = (unsigned long) stress_203(D);
+: note: vect_is_simple_use: operand vect__38.61_323
+: note: def_stmt: vect__38.61_323 = MEM[(real(kind=8) *)&einc];
+: note: type of def: internal
+: note: vect_is_simple_use: operand vect__38.61_431
+: note: def_stmt: vect__38.61_431 = MEM[(real(kind=8) *)vectp_einc.59_440];
: note: type of def: internal
-: note: vect_is_simple_use: operand _438
-: note: def_stmt: _438 = (unsigned int) _439;
+: note: vect_is_simple_use: operand vect__38.61_472
+: note: def_stmt: vect__38.61_472 = MEM[(real(kind=8) *)vectp_einc.59_426];
: note: type of def: internal
-: note: vect_is_simple_use: operand _439
-: note: def_stmt: _439 = -_440;
+: note: vect_is_simple_use: operand _22
+: note: def_stmt: _22 = *dtnext_206(D);
+: note: type of def: internal
+: note: vect_is_simple_use: operand _6
+: note: def_stmt: _6 = MEM[(struct material_type[0:] *)_1][_5].pval[7];
: note: type of def: internal
: note: === vect_analyze_slp ===
: note: Build SLP for einc[0] = _24;
@@ -540,7 +762,6 @@
: note: Build SLP for einc[2] = _28;
: note: Build SLP for einc[3] = _30;
: note: Build SLP for einc[4] = _32;
-: note: Build SLP for einc[5] = _34;
: note: vect_is_simple_use: operand _24
: note: def_stmt: _24 = _22 * _23;
: note: type of def: internal
: note: vect_is_simple_use: operand _32
: note: def_stmt: _32 = _22 * _31;
: note: type of def: internal
-: note: vect_is_simple_use: operand _34
-: note: def_stmt: _34 = _22 * _33;
-: note: type of def: internal
: note: Build SLP for _24 = _22 * _23;
: note: Build SLP for _26 = _22 * _25;
: note: Build SLP for _28 = _22 * _27;
: note: Build SLP for _30 = _22 * _29;
: note: Build SLP for _32 = _22 * _31;
-: note: Build SLP for _34 = _22 * _33;
: note: vect_is_simple_use: operand _22
: note: def_stmt: _22 = *dtnext_206(D);
: note: type of def: internal
@@ -595,12 +812,6 @@
: note: vect_is_simple_use: operand _31
: note: def_stmt: _31 = *dxz_215(D);
: note: type of def: internal
-: note: vect_is_simple_use: operand _22
-: note: def_stmt: _22 = *dtnext_206(D);
-: note: type of def: internal
-: note: vect_is_simple_use: operand _33
-: note: def_stmt: _33 = *dyz_217(D);
-: note: type of def: internal
: note: Build SLP for _22 = *dtnext_206(D);
: note: Build SLP failed: unvectorizable statement _22 = *dtnext_206(D);
: note: Building vector operands from scalars
@@ -608,21 +819,10 @@
: note: Build SLP failed: unvectorizable statement _23 = *dxx_207(D);
: note: Building vector operands from scalars
: note: Building parent vector operands from scalars instead
-: note: Final SLP tree for instance:
-: note: node
-: note: stmt 0 einc[0] = _24;
-: note: stmt 1 einc[1] = _26;
-: note: stmt 2 einc[2] = _28;
-: note: stmt 3 einc[3] = _30;
-: note: stmt 4 einc[4] = _32;
-: note: stmt 5 einc[5] = _34;
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83224] creating character array from elements shorter than declared does not pad with whitespace properly and aborts
Date: Thu, 30 Nov 2017 18:23:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |tkoenig at gcc dot gnu.org
--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Looks like the dependency checking in frontend-passes.c isn‘t doing its job. I
will take a look.
>From gcc-bugs-return-583626-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 18:35:52 2017
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Subject: [Bug c/79153] -Wimplicit-fallthrough missed warning
Date: Thu, 30 Nov 2017 18:35:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42758
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42758&action=edit
gcc8-pr79153.patch
Untested fix.
>From gcc-bugs-return-583627-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 18:36:13 2017
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Subject: [Bug libstdc++/50871] libstdc++ should be built with -Wpedantic and/or -Wsystem-headers
Date: Thu, 30 Nov 2017 18:36:00 -0000
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--- Comment #15 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #14)
> It's better than what we have today, but I'm not sure it's where we want to
> get to in the long term.
>
> I've been trying a patch that allows the system_header pragma to be
> disabled when building and testing.
How about using
#pragma GCC diagnostic warning "-Wsystem-headers"
instead?
> This causes testsuite failures due to
> warnings that can't be controlled by options or diagnostic pragmas:
>
> /home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/cmath:
> 47: error: #include_next is a GCC extension
Maybe leave off -Wpedantic for now.
> /home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/
> complex:1951: warning: floating point suffix 'if' shadowed by implementation
This seems like a real issue. Perhaps for C++14 and up we should disable the
built-in complex suffixes.
>From gcc-bugs-return-583628-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 18:39:04 2017
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Subject: [Bug target/82717] [RISCV] Default value of the -mabi option doesn't match documentation
Date: Thu, 30 Nov 2017 18:39:00 -0000
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--- Comment #8 from Jim Wilson <wilson at gcc dot gnu.org> ---
Author: wilson
Date: Thu Nov 30 18:38:26 2017
New Revision: 255281
URL: https://gcc.gnu.org/viewcvs?rev=255281&root=gcc&view=rev
Log:
Riscv doc fixes and improvements.
gcc/
Backport from mainline
2017-11-30 Jim Wilson <jimw@sifive.com>
* doc/invoke.texi (RISC-V Options): Delete nonexistent -mmemcpy and
-mno-memcpy options. For -mplt, -mfdiv, -mdiv, -msave-restore, and
-mstrict-align, add info on default value. Delete redundant lines for
-mabi. Add missing -mexplicit-relocs docs.
Backport from mainline
2017-11-01 Palmer Dabbelt <palmer@dabbelt.com>
* doc/invoke.texi (RISC-V Options): Use "@minus{}2 GB", not "-2 GB".
* doc/invoke.texi (RISC-V Options): Explicitly name the medlow
and medany code models, and describe what they do.
2017-10-27 Palmer Dabbelt <palmer@dabbelt.com>
PR target/82717
* doc/invoke.texi (RISC-V) <-mabi>: Correct and improve.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/doc/invoke.texi
>From gcc-bugs-return-583629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 18:43:12 2017
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Subject: [Bug fortran/82842] (PDT) Constructors do not work
Date: Thu, 30 Nov 2017 18:43:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
There are a lot more issues with this PR than I am prepared to deal with right
now. However, I will take it and will return to it at a later date.
For the record, the backtrace at the error is:
#0 gfc_match_name (buffer=buffer@entry=0x7fffffffcdc0 "\240\244#\002")
at ../../trunk/gcc/fortran/match.c:659
#1 0x00000000008a88a7 in match_actual_arg (result=result@entry=0x223a4b8)
at ../../trunk/gcc/fortran/primary.c:1522
#2 0x00000000008a8b6b in match_keyword_arg (actual=actual@entry=0x223a4a0,
base=base@entry=0x223a4a0,
pdt=pdt@entry=false) at ../../trunk/gcc/fortran/primary.c:1649
#3 0x00000000008a9faa in gfc_match_actual_arglist (sub_flag=sub_flag@entry=0,
argp=argp@entry=0x7fffffffcf58, pdt=pdt@entry=false) at
../../trunk/gcc/fortran/primary.c:1863
#4 0x00000000008ac49e in gfc_match_rvalue (result=result@entry=0x7fffffffd040)
at ../../trunk/gcc/fortran/primary.c:3325
...snip...
Paul
>From gcc-bugs-return-583630-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 18:47:33 2017
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Subject: [Bug fortran/82865] Option -fdec collides with PDT
Date: Thu, 30 Nov 2017 18:47:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
I agree with the general sentiment that this should probably be a WONT FIX.
However, it is concerning that there is an interaction.
I will put this on on side as one of the longer term TODOs.
Paul
>From gcc-bugs-return-583631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 18:56:03 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83233] New: [8 Regression] gimple-ssa-store-merging.c:183:3: warning: unnamed type with no linkage used to declare variable with linkage
Date: Thu, 30 Nov 2017 18:56:00 -0000
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Bug ID: 83233
Summary: [8 Regression] gimple-ssa-store-merging.c:183:3:
warning: unnamed type with no linkage used to declare
variable with linkage
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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In stage 1 with -std=gnu++98:
../../gcc/gcc/gimple-ssa-store-merging.c:183:3: warning: unnamed type with no
linkage used to declare variable ‘{anonymous}::<unnamed struct>
{anonymous}::nop_stats’ with linkage
} nop_stats, bswap_stats;
^~~~~~~~~
../../gcc/gcc/gimple-ssa-store-merging.c:183:14: warning: unnamed type with no
linkage used to declare variable ‘{anonymous}::<unnamed struct>
{anonymous}::bswap_stats’ with linka
ge
} nop_stats, bswap_stats;
^~~~~~~~~~~
Could be fixed by using idiomatic C++, instead of
namespace {
struct
{
...
} nop_stats, bswap_stats;
}
something like:
namespace {
struct Stats
{
...
};
Stats nop_stats, bswap_stats;
}
>From gcc-bugs-return-583632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 20:07:58 2017
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Subject: [Bug fortran/83224] creating character array from elements shorter than declared does not pad with whitespace properly and aborts
Date: Thu, 30 Nov 2017 20:07:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
This looks like this could work.
No time for a patch submission now, that will have to wait for
a few days.
--- frontend-passes.c (Revision 255181)
+++ frontend-passes.c (Arbeitskopie)
@@ -249,7 +249,7 @@ realloc_string_callback (gfc_code **c, int *walk_s
return 0;
expr1 = co->expr1;
- if (expr1->ts.type != BT_CHARACTER || expr1->rank != 0
+ if (expr1->ts.type != BT_CHARACTER
|| !gfc_expr_attr(expr1).allocatable
|| !expr1->ts.deferred)
return 0;
@@ -270,8 +270,9 @@ realloc_string_callback (gfc_code **c, int *walk_s
if (!found_substr)
return 0;
}
- else if (expr2->expr_type != EXPR_OP
- || expr2->value.op.op != INTRINSIC_CONCAT)
+ else if (expr2->expr_type != EXPR_ARRAY
+ && (expr2->expr_type != EXPR_OP
+ || expr2->value.op.op != INTRINSIC_CONCAT))
return 0;
>From gcc-bugs-return-583633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 20:13:33 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83227] [7/8 Regression] internal compiler error: in process_init_constructor_array
Date: Thu, 30 Nov 2017 20:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83227
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-30
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r240889.
>From gcc-bugs-return-583634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 20:40:17 2017
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83189] [8 regression] internal compiler error: in probability_in, at profile-count.h:1050
Date: Thu, 30 Nov 2017 20:40:00 -0000
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David Binderman <dcb314 at hotmail dot com> changed:
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--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
I am also seeing this during a bootstrap build.
../../src/trunk/gcc/vec.h: In member function ‘vec<T, A, vl_embed>* vec<T, A,
vl_embed>::copy() const [with T = ipa_agg_jf_item; A = va_gc]’:
../../src/trunk/gcc/vec.h:910:1: internal compiler error: in probability_in, at
profile-count.h:1050
vec<T, A, vl_embed>::copy (ALONE_MEM_STAT_DECL) const
^~~~~~~~~~~~~~~~~~~
0xc0b456 profile_count::probability_in(profile_count) const
../../src/trunk/gcc/profile-count.h:1050
0x13b6e8d tree_transform_and_unroll_loop(loop*, unsigned int, edge_def*,
tree_niter_desc*, void (*)(loop*, void*), void*)
>From gcc-bugs-return-583635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 20:42:04 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/50871] libstdc++ should be built with -Wpedantic and/or -Wsystem-headers
Date: Thu, 30 Nov 2017 20:42:00 -0000
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--- Comment #16 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #15)
> (In reply to Jonathan Wakely from comment #14)
> > It's better than what we have today, but I'm not sure it's where we want to
> > get to in the long term.
> >
> > I've been trying a patch that allows the system_header pragma to be
> > disabled when building and testing.
>
> How about using
>
> #pragma GCC diagnostic warning "-Wsystem-headers"
>
> instead?
That doesn't work well, see PR 80472
> > This causes testsuite failures due to
> > warnings that can't be controlled by options or diagnostic pragmas:
> >
> > /home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/cmath:
> > 47: error: #include_next is a GCC extension
>
> Maybe leave off -Wpedantic for now.
Yep. It would be nice if we had __include_next, or could add __extension__ to
avoid those warnings.
> > /home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/
> > complex:1951: warning: floating point suffix 'if' shadowed by implementation
>
> This seems like a real issue. Perhaps for C++14 and up we should disable
> the built-in complex suffixes.
See PR 79228
>From gcc-bugs-return-583636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 20:44:55 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/50871] libstdc++ should be built with -Wpedantic and/or -Wsystem-headers
Date: Thu, 30 Nov 2017 20:44:00 -0000
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--- Comment #17 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #16)
> (In reply to Jason Merrill from comment #15)
> > (In reply to Jonathan Wakely from comment #14)
> > > It's better than what we have today, but I'm not sure it's where we want to
> > > get to in the long term.
> > >
> > > I've been trying a patch that allows the system_header pragma to be
> > > disabled when building and testing.
> >
> > How about using
> >
> > #pragma GCC diagnostic warning "-Wsystem-headers"
> >
> > instead?
>
> That doesn't work well, see PR 80472
Oh, did you mean putting that in the libstdc++-v3/src/*/*.cc sources, and
tests, rather than in the headers?
That could work as long as it doesn't also enable warnings for C library
headers, which we generally can't fix or avoid.
>From gcc-bugs-return-583637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 20:53:04 2017
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/83103] Improve __mulkc3 and __divkc3 on Power9
Date: Thu, 30 Nov 2017 20:53:00 -0000
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--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Thu Nov 30 20:52:27 2017
New Revision: 255282
URL: https://gcc.gnu.org/viewcvs?rev=255282&root=gcc&view=rev
Log:
2017-11-30 Michael Meissner <meissner@linux.vnet.ibm.com>
PR libgcc/83112
* config/rs6000/float128-ifunc.c (__addkf3_resolve): Use the
correct type for all ifunc resolvers to silence -Wattribute-alias
warnings. Eliminate the forward declaration of the resolver
functions which is no longer needed.
(__subkf3_resolve): Likewise.
(__mulkf3_resolve): Likewise.
(__divkf3_resolve): Likewise.
(__negkf2_resolve): Likewise.
(__eqkf2_resolve): Likewise.
(__nekf2_resolve): Likewise.
(__gekf2_resolve): Likewise.
(__gtkf2_resolve): Likewise.
(__lekf2_resolve): Likewise.
(__ltkf2_resolve): Likewise.
(__unordkf2_resolve): Likewise.
(__extendsfkf2_resolve): Likewise.
(__extenddfkf2_resolve): Likewise.
(__trunckfsf2_resolve): Likewise.
(__trunckfdf2_resolve): Likewise.
(__fixkfsi_resolve): Likewise.
(__fixkfdi_resolve): Likewise.
(__fixunskfsi_resolve): Likewise.
(__fixunskfdi_resolve): Likewise.
(__floatsikf_resolve): Likewise.
(__floatdikf_resolve): Likewise.
(__floatunsikf_resolve): Likewise.
(__floatundikf_resolve): Likewise.
(__extendkftf2_resolve): Likewise.
(__trunctfkf2_resolve): Likewise.
PR libgcc/83103
* config/rs6000/quad-float128.h (TF): Don't define if long double
is IEEE 128-bit floating point.
(TCtype): Define as either TCmode or KCmode, depending on whether
long double is IEEE 128-bit floating point.
(__mulkc3_sw): Add declarations for software/hardware versions of
complex multiply/divide.
(__divkc3_sw): Likewise.
(__mulkc3_hw): Likewise.
(__divkc3_hw): Likewise.
* config/rs6000/_mulkc3.c (_mulkc3): If we are building ifunc
handlers to switch between using software emulation and hardware
float128 instructions, build the complex multiply/divide functions
for both software and hardware support.
* config/rs6000/_divkc3.c (_divkc3): Likewise.
* config/rs6000/float128-ifunc.c (__mulkc3_resolve): Likewise.
(__divkc3_resolve): Likewise.
(__mulkc3): Likewise.
(__divkc3): Likewise.
* config/rs6000/t-float128-hw (fp128_hardfp_src): Likewise.
(fp128_hw_src): Likewise.
(fp128_hw_static_obj): Likewise.
(fp128_hw_shared_obj): Likewise.
(_mulkc3-hw.c): Create _mulkc3-hw.c and _divkc3-hw.c from
_mulkc3.c and _divkc3.c, changing the function name.
(_divkc3-hw.c): Likewise.
* config/rs6000/t-float128 (clean-float128): Delete _mulkc3-hw.c
and _divkc3-hw.c.
Modified:
trunk/libgcc/ChangeLog
trunk/libgcc/config/rs6000/_divkc3.c
trunk/libgcc/config/rs6000/_mulkc3.c
trunk/libgcc/config/rs6000/float128-ifunc.c
trunk/libgcc/config/rs6000/quad-float128.h
trunk/libgcc/config/rs6000/t-float128
trunk/libgcc/config/rs6000/t-float128-hw
>From gcc-bugs-return-583638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 20:53:05 2017
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/83112] Silence warnings from PowerPC libgcc float128-ifunc.c compilation
Date: Thu, 30 Nov 2017 20:53:00 -0000
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--- Comment #1 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Thu Nov 30 20:52:27 2017
New Revision: 255282
URL: https://gcc.gnu.org/viewcvs?rev=255282&root=gcc&view=rev
Log:
2017-11-30 Michael Meissner <meissner@linux.vnet.ibm.com>
PR libgcc/83112
* config/rs6000/float128-ifunc.c (__addkf3_resolve): Use the
correct type for all ifunc resolvers to silence -Wattribute-alias
warnings. Eliminate the forward declaration of the resolver
functions which is no longer needed.
(__subkf3_resolve): Likewise.
(__mulkf3_resolve): Likewise.
(__divkf3_resolve): Likewise.
(__negkf2_resolve): Likewise.
(__eqkf2_resolve): Likewise.
(__nekf2_resolve): Likewise.
(__gekf2_resolve): Likewise.
(__gtkf2_resolve): Likewise.
(__lekf2_resolve): Likewise.
(__ltkf2_resolve): Likewise.
(__unordkf2_resolve): Likewise.
(__extendsfkf2_resolve): Likewise.
(__extenddfkf2_resolve): Likewise.
(__trunckfsf2_resolve): Likewise.
(__trunckfdf2_resolve): Likewise.
(__fixkfsi_resolve): Likewise.
(__fixkfdi_resolve): Likewise.
(__fixunskfsi_resolve): Likewise.
(__fixunskfdi_resolve): Likewise.
(__floatsikf_resolve): Likewise.
(__floatdikf_resolve): Likewise.
(__floatunsikf_resolve): Likewise.
(__floatundikf_resolve): Likewise.
(__extendkftf2_resolve): Likewise.
(__trunctfkf2_resolve): Likewise.
PR libgcc/83103
* config/rs6000/quad-float128.h (TF): Don't define if long double
is IEEE 128-bit floating point.
(TCtype): Define as either TCmode or KCmode, depending on whether
long double is IEEE 128-bit floating point.
(__mulkc3_sw): Add declarations for software/hardware versions of
complex multiply/divide.
(__divkc3_sw): Likewise.
(__mulkc3_hw): Likewise.
(__divkc3_hw): Likewise.
* config/rs6000/_mulkc3.c (_mulkc3): If we are building ifunc
handlers to switch between using software emulation and hardware
float128 instructions, build the complex multiply/divide functions
for both software and hardware support.
* config/rs6000/_divkc3.c (_divkc3): Likewise.
* config/rs6000/float128-ifunc.c (__mulkc3_resolve): Likewise.
(__divkc3_resolve): Likewise.
(__mulkc3): Likewise.
(__divkc3): Likewise.
* config/rs6000/t-float128-hw (fp128_hardfp_src): Likewise.
(fp128_hw_src): Likewise.
(fp128_hw_static_obj): Likewise.
(fp128_hw_shared_obj): Likewise.
(_mulkc3-hw.c): Create _mulkc3-hw.c and _divkc3-hw.c from
_mulkc3.c and _divkc3.c, changing the function name.
(_divkc3-hw.c): Likewise.
* config/rs6000/t-float128 (clean-float128): Delete _mulkc3-hw.c
and _divkc3-hw.c.
Modified:
trunk/libgcc/ChangeLog
trunk/libgcc/config/rs6000/_divkc3.c
trunk/libgcc/config/rs6000/_mulkc3.c
trunk/libgcc/config/rs6000/float128-ifunc.c
trunk/libgcc/config/rs6000/quad-float128.h
trunk/libgcc/config/rs6000/t-float128
trunk/libgcc/config/rs6000/t-float128-hw
>From gcc-bugs-return-583639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 20:55:14 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/83112] Silence warnings from PowerPC libgcc float128-ifunc.c compilation
Date: Thu, 30 Nov 2017 20:55:00 -0000
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Michael Meissner <meissner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Fixed in subversion id 255282.
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Subject: [Bug libgcc/83103] Improve __mulkc3 and __divkc3 on Power9
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Michael Meissner <meissner at gcc dot gnu.org> changed:
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--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
Fixed in subversion id 255282.
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Subject: [Bug c++/79228] 'i' suffix for __complex__ extension interferes with C++14 UDLs for std::complex
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Jason Merrill <jason at gcc dot gnu.org> changed:
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CC| |jason at gcc dot gnu.org
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From: "ketan.surender at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83234] New: Aggressive loop optim warning for loop iteration that cannot happen
Date: Thu, 30 Nov 2017 21:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83234
Bug ID: 83234
Summary: Aggressive loop optim warning for loop iteration that
cannot happen
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: ketan.surender at gmail dot com
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Created attachment 42759
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42759&action=edit
Reproduction File
I have an example program with the code:
for (j = 0; j < 3; j++) {
for (i = 1; i <= 3 - j; i++) {
out8[i - 1][j] = (int8_T)(i + j);
}
for (i = 4 - j; i < 4; i++) {
out8[i - 1][j] = in15[(i + j) - 3];
}
}
that produces the warning
hankel_script.c: In function ‘hankel_script’:
hankel_script.c:235:32: warning: iteration 2147483644 invokes undefined
behavior [-Waggressive-loop-optimizations]
out8[i - 1][j] = in15[(i + j) - 3];
~~~^~~~
hankel_script.c:234:5: note: within this loop
for (i = 4 - j; i < 4; i++) {
The loop bounds have been defined with constants such that iteration 2147483644
cannot happen.
Repro:
gcc -c -O2 hankel_script.i
I do not see the warning with -O3 or -O1.
My gcc version is 6.3. See details below. I am able to reproduce this using
x86-64 gcc 7.2 on https://gcc.godbolt.org/.
COLLECT_GCC=gcc
Target: x86_64-pc-linux-gnu
Configured with: [SCRUB]/sources/gcc-6.3/configure
--with-gmp=[SCRUB]/gcc-6.3/gmp-4.3 --with-mpfr=[SCRUB]/gcc-6.3/mpfr
--with-mpc=[SCRUB]/gcc-6.3/mpc --enable-languages=c,c++,fortran
--with-bugurl=[SCRUB],_Debugging --enable-shared --enable-linker-build-id
--enable-plugin --enable-checking=release --enable-multiarch --enable-gold
--enable-ld=default --prefix=[SCRUB]/gcc-6.3.0 --with-pkgversion='MW GCC
6.3.0-GLIBC2.11' --with-tune=generic --with-system-zlib --enable-multilib
--with-multilib-list=m32,m64 --with-arch-directory=amd64 --with-arch-32=i586
--with-abi=m64
gcc version 6.3.0 (MW GCC 6.3.0-GLIBC2.11)
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Subject: [Bug middle-end/83234] Aggressive loop optim warning for loop iteration that cannot happen
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--- Comment #1 from Ketan <ketan.surender at gmail dot com> ---
I am on Debian 8
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From: "chefmax at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/81697] Incorrect ASan global variables alignment on arm
Date: Thu, 30 Nov 2017 21:38:00 -0000
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--- Comment #4 from chefmax at gcc dot gnu.org ---
Author: chefmax
Date: Thu Nov 30 21:38:16 2017
New Revision: 255283
URL: https://gcc.gnu.org/viewcvs?rev=255283&root=gcc&view=rev
Log:
gcc/
2017-11-30 Maxim Ostapenko <m.ostapenko@samsung.com>
PR sanitizer/81697
* asan.c (asan_protect_global): Add new ignore_decl_rtl_set_p
parameter. Return true if ignore_decl_rtl_set_p is true and other
conditions are satisfied.
* asan.h (asan_protect_global): Add new parameter.
* varasm.c (categorize_decl_for_section): Pass true as second parameter
to asan_protect_global calls.
gcc/testsuite/
2017-11-30 Maxim Ostapenko <m.ostapenko@samsung.com>
PR sanitizer/81697
* c-c++-common/asan/pr81697.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/asan/pr81697.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/asan.c
trunk/gcc/asan.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/varasm.c
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From: "paul.k.romano at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83235] New: IAND sometimes doesn't take bitwise-and of sign bit with -O2
Date: Thu, 30 Nov 2017 21:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83235
Bug ID: 83235
Summary: IAND sometimes doesn't take bitwise-and of sign bit
with -O2
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 42760
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42760&action=edit
Minimal example of IAND bug
I ran into what appears to be a strange bug where the IAND intrinsic function
sometimes doesn't take the bitwise-and of the sign bit for 64-bit integers.
I've attached a MWE that demonstrates the bug, which can be reproduced by
compiling with -O2 or higher. The example writes the bit representation of two
64-bit integers and the result of taking IAND() on them and you can see that
the result of IAND doesn't handle the sign bit correctly. Several slight
changes seem to suppress the bug, e.g. having the second argument to IAND not
be and integer parameter and putting the body of foo in the main program.
I produced this bug using the default gcc from APT in Ubuntu 17.10, as follows:
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 7.2.0-8ubuntu3'
--with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.2.0 (Ubuntu 7.2.0-8ubuntu3)
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From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/66205] gnatbind generates invalid code when finalization is enabled in restricted runtime
Date: Thu, 30 Nov 2017 22:53:00 -0000
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simon at pushface dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |7.1.0, 8.0
--- Comment #9 from simon at pushface dot org ---
Still fails in 8.0.0 20171102.
I’m quite happy to work out an updated patch (there doesn’t appear to be much
change required), but only if there is at least _some_ chance it might get
included.
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From: "jyong at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80881] [7/8 Regression] null pointer access in libgomp.h
Date: Thu, 30 Nov 2017 23:25:00 -0000
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jyong at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-30
Ever confirmed|0 |1
--- Comment #14 from jyong at gcc dot gnu.org ---
Doing some simple testcases, looks like generates:
movl %gs:0, %eax
movl _a@ntpoff(%eax), %eax
While MSVC does (Intel syntax):
mov ecx, DWORD PTR __tls_index
mov eax, DWORD PTR fs:__tls_array
mov eax, DWORD PTR [eax+ecx*4]
mov eax, DWORD PTR _a[eax]
For a statement "return a;" where a is a thread local integer.
I'm not sure how to modify the machine definition to emit this.
>From gcc-bugs-return-583648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 23:30:27 2017
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From: "zackw at panix dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/83236] New: "Did you mean" suggestions maybe shouldn't offer implementation-private names
Date: Thu, 30 Nov 2017 23:30:00 -0000
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Bug ID: 83236
Summary: "Did you mean" suggestions maybe shouldn't offer
implementation-private names
Product: gcc
Version: 7.2.0
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On Linux/glibc,
$ cat > test.c <<EOF
#include <sys/stat.h>
ino_t inode;
EOF
$ gcc -std=c89 -fsyntax-only test.c
test.c:2:1: error: unknown type name ‘ino_t’; did you mean ‘__ino_t’?
ino_t inode;
^~~~~
__ino_t
$ gcc --version
gcc (Debian 7.2.0-16) 7.2.0
__ino_t is an implementation detail of glibc's headers, and application
programmers shouldn't be encouraged to use it.
To first order, I don't think any implementation-namespace names (/^_[_A-Z]/)
should be offered as suggestions. To second order, they could be suggested
when the unknown symbol is itself in the implementation namespace, or when the
suggestion is a _documented_ impl-namespace symbol like __DATE__ or _IOFBF or
_Bool.
>From gcc-bugs-return-583649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 30 23:43:47 2017
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Subject: [Bug c/83222] [8 regression] Inconsistent "initializer element is not constant" error
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Nov 30 23:43:10 2017
New Revision: 255285
URL: https://gcc.gnu.org/viewcvs?rev=255285&root=gcc&view=rev
Log:
PR c/83222
* c-tree.h (decl_constant_value_1): Declare.
* c-typeck.c (decl_constant_value_1): New function.
(decl_constant_value): Use it.
* c-fold.c (c_fully_fold_internal): If in_init, use
decl_constant_value_1 instead of decl_constant_value.
* gcc.c-torture/compile/pr83222.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr83222.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-fold.c
trunk/gcc/c/c-tree.h
trunk/gcc/c/c-typeck.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c/83222] [8 regression] Inconsistent "initializer element is not constant" error
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Should be fixed now.
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Subject: [Bug target/82106] [RISCV] Misaligned loads generated when doubles are split between stack and registers
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--- Comment #5 from Jim Wilson <wilson at gcc dot gnu.org> ---
Created attachment 42761
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42761&action=edit
Alternate testcase.
To show how unaligned split argument gets loaded into general register.
>From gcc-bugs-return-583652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 00:22:50 2017
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Subject: [Bug target/82106] [RISCV] Misaligned loads generated when doubles are split between stack and registers
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--- Comment #6 from Jim Wilson <wilson at gcc dot gnu.org> ---
Created attachment 42762
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Work in progress patch.
The && 1 are calls to a target hook I haven't written yet, and the && 0 is the
same hook with !. The code to load from reg&stack into target needs to be
generalized.
>From gcc-bugs-return-583653-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 00:30:41 2017
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Subject: [Bug target/82106] [RISCV] Misaligned loads generated when doubles are split between stack and registers
Date: Fri, 01 Dec 2017 00:30:00 -0000
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--- Comment #7 from Jim Wilson <wilson at gcc dot gnu.org> ---
I have an initial attempt to fix this in the patch I just added as an
attachment. It needs more work and more testing to be useful, and agreement
from other gcc hackers that this makes sense.
On the original testcase, without the patch we get
sw a7,12(sp)
fld fa0,12(sp)
and with the patch we get
lw a5,16(sp)
sw a7,8(sp)
sw a5,12(sp)
fld fa0,8(sp)
which is larger, but avoids the unaligned load, and hence may be faster is
unaligned loads trap.
On the alternate testcase, without the patch we get
sw a7,12(sp)
lw a0,12(sp)
lw a1,16(sp)
and with the patch we get
lw a1,0(sp)
mv a0,a7
which is smaller and faster.
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Subject: [Bug fortran/83225] [8.0 regression] runtime error in transfer.c
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jvdelisle at gcc dot gnu.org
--- Comment #2 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
I will investigate.
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Subject: [Bug tree-optimization/81165] [8 Regression] Regression in GCC-8.0.0's optimizer
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Alexandre Oliva <aoliva at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aoliva at gcc dot gnu.org
--- Comment #4 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Bisect revealed the patch for bug 80237 caused this regression. The extra
argument passed to find_leader_in_sets ends up providing us with a leader where
before the patch we wouldn't have one, and this ultimately happens to stop us
from optimizing out the entire loop.
>From gcc-bugs-return-583656-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 07:36:27 2017
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Subject: [Bug fortran/83224] creating character array from elements shorter than declared does not pad with whitespace properly and aborts
Date: Fri, 01 Dec 2017 07:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83224
--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Fri Dec 1 07:35:50 2017
New Revision: 255294
URL: https://gcc.gnu.org/viewcvs?rev=255294&root=gcc&view=rev
Log:
2017-12-01 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/83224
* frontend-passes.c (realloc_string_callback): Handle
case for which the RHS is an array expression.
2017-12-01 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/83224
* gfortran.dg/dependency_50.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/dependency_50.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/frontend-passes.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/83224] creating character array from elements shorter than declared does not pad with whitespace properly and aborts
Date: Fri, 01 Dec 2017 07:44:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
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--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
r255294 fixes the test case in comment#1, but not the
original test case; that one now ICEs:
interner Compiler-Fehler: in gimplify_var_or_parm_decl, bei gimplify.c:2615
0x663044 gimplify_var_or_parm_decl
../../trunk/gcc/gimplify.c:2615
0xbc3387 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../trunk/gcc/gimplify.c:11785
0xbce9bf gimplify_modify_expr
../../trunk/gcc/gimplify.c:5538
0xbc3b59 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../trunk/gcc/gimplify.c:11340
0xbc6ec6 gimplify_stmt(tree_node**, gimple**)
../../trunk/gcc/gimplify.c:6556
0xbc49db gimplify_statement_list
../../trunk/gcc/gimplify.c:1736
0xbc49db gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../trunk/gcc/gimplify.c:11769
0xbc6ec6 gimplify_stmt(tree_node**, gimple**)
../../trunk/gcc/gimplify.c:6556
0xbc4aa2 gimplify_and_add(tree_node*, gimple**)
../../trunk/gcc/gimplify.c:442
0xbc4aa2 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../trunk/gcc/gimplify.c:11691
0xbc6ec6 gimplify_stmt(tree_node**, gimple**)
../../trunk/gcc/gimplify.c:6556
0xbc49db gimplify_statement_list
../../trunk/gcc/gimplify.c:1736
0xbc49db gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../trunk/gcc/gimplify.c:11769
0xbc6ec6 gimplify_stmt(tree_node**, gimple**)
../../trunk/gcc/gimplify.c:6556
0xbc7bce gimplify_bind_expr
../../trunk/gcc/gimplify.c:1294
0xbc35d2 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../trunk/gcc/gimplify.c:11541
0xbc6ec6 gimplify_stmt(tree_node**, gimple**)
../../trunk/gcc/gimplify.c:6556
0xbc49db gimplify_statement_list
../../trunk/gcc/gimplify.c:1736
0xbc49db gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../trunk/gcc/gimplify.c:11769
0xbc6ec6 gimplify_stmt(tree_node**, gimple**)
../../trunk/gcc/gimplify.c:6556
Unassigning (for now).
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83235] IAND sometimes doesn't take bitwise-and of sign bit with -O2
Date: Fri, 01 Dec 2017 07:46:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #1 from kargl at gcc dot gnu.org ---
A modification of your code to print decimal shows
x = 2806196910506780709
x*x = -5105260488395614887
y = 9223372036854775807
The bit model specifically states that "The interpretation of a
negative integer as a sequence of bits is processor dependent."
The definition of the IAND intrinsic also states "The model for the
interpretation of an integer value as a sequence of bits is in
13.3". Unfortunately, Fortran does not have an unsigned integer
type.
>From gcc-bugs-return-583659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 07:57:53 2017
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Subject: [Bug fortran/83224] creating character array from elements shorter than declared does not pad with whitespace properly and aborts
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |tkoenig at gcc dot gnu.org
--- Comment #7 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I'll continue taking a look, looks like a bug
in the generated temporary variable.
>From gcc-bugs-return-583660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 08:07:08 2017
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From: "guille at berkeley dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83024] ICE in build_address, at cp/typeck.c:5623
Date: Fri, 01 Dec 2017 08:07:00 -0000
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--- Comment #2 from Guille <guille at berkeley dot edu> ---
I should point out that the '-fconcepts' option isn't necessary, but
'-std=c++1z' is (e.g. with '-std=c++11' it won't ICE but it also won't
compile).
So a minimal compilation command is:
$ c++ t.c -std=c++1z
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
Date: Fri, 01 Dec 2017 08:09:00 -0000
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 1 08:08:55 2017
New Revision: 255295
URL: https://gcc.gnu.org/viewcvs?rev=255295&root=gcc&view=rev
Log:
PR sanitizer/83219
* tree-cfg.c: Include asan.h.
(gimple_seq_unreachable_p): Return false for -fsanitize=unreachable.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-cfg.c
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From: "christoph at kohlio dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/83237] New: Values returned by std::poisson_distribution are not distributed correctly
Date: Fri, 01 Dec 2017 08:11:00 -0000
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Bug ID: 83237
Summary: Values returned by std::poisson_distribution are not
distributed correctly
Product: gcc
Version: 7.2.0
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Severity: normal
Priority: P3
Component: libstdc++
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Values returned by std::poisson_distribution are not distributed according to a
Poisson distribution with the given mean. Apparently there is a problem
generating variates around the mean value.
Example code which generates 1E8 variates:
#include <array>
#include <cmath>
#include <iostream>
#include <random>
int main() {
// The problem turned out to be independent on the engine
std::mt19937_64 engine;
// Set fixed seed for easy reproducibility
// The problem turned out to be independent on seed
engine.seed(1);
std::poisson_distribution<int> distribution(157.17);
for (int i = 0; i < 1E8; i++) {
const int number = distribution(engine);
std::cout << number << std::endl;
}
}
There is a strong deviation from the expected statistics in bin 158, as shown
in the following SO question:
https://stackoverflow.com/questions/47586495/bug-in-the-c-standard-library-in-stdpoisson-distribution/47587735#47587735
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Subject: [Bug sanitizer/81275] [6/7/8 Regression] -fsanitize=thread produce incorrect -Wreturn-type warning
Date: Fri, 01 Dec 2017 08:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81275
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 1 08:11:56 2017
New Revision: 255296
URL: https://gcc.gnu.org/viewcvs?rev=255296&root=gcc&view=rev
Log:
PR sanitizer/81275
* tree-cfg.c (group_case_labels_stmt): Don't optimize away
C++ FE implicitly added __builtin_unreachable () until -Wreturn-type
is diagnosed.
* c-c++-common/tsan/pr81275.c: Remove dg-skip-if.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/tsan/pr81275.c
trunk/gcc/tree-cfg.c
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Subject: [Bug tree-optimization/83221] [8 Regression] qsort comparator not anti-commutative: -2147483648, -2147483648
Date: Fri, 01 Dec 2017 08:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83221
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 1 08:14:21 2017
New Revision: 255297
URL: https://gcc.gnu.org/viewcvs?rev=255297&root=gcc&view=rev
Log:
PR tree-optimization/83221
* tree-ssa-reassoc.c (sort_by_operand_rank): Shift bb_rank
down by 16.
(init_reassoc): Formatting fix.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-reassoc.c
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Subject: [Bug c/79153] -Wimplicit-fallthrough missed warning
Date: Fri, 01 Dec 2017 08:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79153
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 1 08:17:06 2017
New Revision: 255298
URL: https://gcc.gnu.org/viewcvs?rev=255298&root=gcc&view=rev
Log:
PR c/79153
* tree.h (SWITCH_BREAK_LABEL_P): Define.
* gimplify.c (collect_fallthrough_labels): Handle GIMPLE_BIND
starting with a GIMPLE_SWITCH and ending with GIMPLE_LABEL with
SWITCH_BREAK_LABEL_P set on the label.
(gimplify_switch_expr): Set SWITCH_BREAK_LABEL_P on the label
added for default case if it was missing and not all cases covered.
Wrap GIMPLE_SWITCH and the switch_body_seq into a GIMPLE_BIND if
switch_body_seq ends with a GIMPLE_LABEL with SWITCH_BREAK_LABEL_P
set on the label.
* tree-chrec.c (evolution_function_is_univariate_p): Add return true;
to avoid -Wimplicit-fallthrough warning.
* config/i386/i386.c (ix86_expand_special_args_builtin): Add
FALLTHRU comment to avoid -Wimplicit-fallthrough warning.
c/
* c-parser.c: Include tree-iterator.h.
(c_parser_switch_statement): Emit LABEL_EXPR for the break label
into SWITCH_BODY instead of after it and set SWITCH_BREAK_LABEL_P
on it.
cp/
* cp-gimplify.c (genericize_switch_stmt): Emit LABEL_EXPR for the
break label into SWITCH_BODY instead of after it and set
SWITCH_BREAK_LABEL_P on it.
* parser.c (cp_parser_objc_expression): Add FALLTHRU comment to avoid
-Wimplicit-fallthrough warning.
fortran/
* match.c (gfc_match): Add FALLTHRU comment to avoid
-Wimplicit-fallthrough warning.
testsuite/
* c-c++-common/Wimplicit-fallthrough-7.c: Adjust expected warning
line.
* c-c++-common/Wimplicit-fallthrough-36.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-36.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-parser.c
trunk/gcc/config/i386/i386.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/cp/parser.c
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/match.c
trunk/gcc/gimplify.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-7.c
trunk/gcc/tree-chrec.c
trunk/gcc/tree.h
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Subject: [Bug tree-optimization/83233] [8 Regression] gimple-ssa-store-merging.c:183:3: warning: unnamed type with no linkage used to declare variable with linkage
Date: Fri, 01 Dec 2017 08:19:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 1 08:18:52 2017
New Revision: 255299
URL: https://gcc.gnu.org/viewcvs?rev=255299&root=gcc&view=rev
Log:
PR tree-optimization/83233
* gimple-ssa-store-merging.c (nop_stats, bswap_stats): Use
bswap_stat name for the struct.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-store-merging.c
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Subject: [Bug tree-optimization/83233] [8 Regression] gimple-ssa-store-merging.c:183:3: warning: unnamed type with no linkage used to declare variable with linkage
Date: Fri, 01 Dec 2017 08:21:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug sanitizer/83219] [8 regression] c-c++-common/ubsan/unreachable-2.c fails starting with r255201
Date: Fri, 01 Dec 2017 08:21:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c/79153] -Wimplicit-fallthrough missed warning
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Assignee|mpolacek at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.1+.
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Subject: [Bug sanitizer/81275] [6/7 Regression] -fsanitize=thread produce incorrect -Wreturn-type warning
Date: Fri, 01 Dec 2017 08:25:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Summary|[6/7/8 Regression] |[6/7 Regression]
|-fsanitize=thread produce |-fsanitize=thread produce
|incorrect -Wreturn-type |incorrect -Wreturn-type
|warning |warning
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk.
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Subject: [Bug tree-optimization/83221] [8 Regression] qsort comparator not anti-commutative: -2147483648, -2147483648
Date: Fri, 01 Dec 2017 08:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83221
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-583672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 08:28:55 2017
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Subject: [Bug sanitizer/81275] [6/7 Regression] -fsanitize=thread produce incorrect -Wreturn-type warning
Date: Fri, 01 Dec 2017 08:28:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
.
>From gcc-bugs-return-583673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 08:35:52 2017
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Subject: [Bug fortran/83235] IAND sometimes doesn't take bitwise-and of sign bit with -O2
Date: Fri, 01 Dec 2017 08:35:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For such a large x like 2806196910506780709 x*x overflows and thus it is
undefined behavior.
>From gcc-bugs-return-583676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 08:42:19 2017
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Subject: [Bug c/66618] Failure to diagnose non-constant initializer for static object with -O1
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.1+.
>From gcc-bugs-return-583675-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 08:42:19 2017
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Subject: [Bug tree-optimization/81165] [8 Regression] Regression in GCC-8.0.0's optimizer
Date: Fri, 01 Dec 2017 08:42:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that whatever clever optimization we did in GCC 7 it only happened during
RTL optimization. The root cause of the regression is a change in the GIMPLE
IL.
Andrew figured we miss some simplification patterns. I think that for
x1.1_4 ={v} x1;
_5 = (unsigned short) x1.1_4;
_6 = _5 ^ 8;
_7 = (short int) _6;
_29 = _7 & 1;
_8 = (int) _29;
_9 = _8 + -1;
_15 = (unsigned int) _9;
_30 = 1 >> _15;
we miss to optimize (int)((short int)((unsigned short) x1.1_4 ^ 8) & 1) to
(int)(x1.1_4 & 1) as well.
Not enough to eliminate the loop. Somebody has to investigate what RTL opt did
which transform to do that...
>From gcc-bugs-return-583674-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 08:42:19 2017
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Subject: [Bug c/69960] "initializer element is not constant"
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.1+.
>From gcc-bugs-return-583677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 08:57:59 2017
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Subject: [Bug target/80881] Implement Windows native TLS
Date: Fri, 01 Dec 2017 08:57:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8 Regression] null |Implement Windows native
|pointer access in libgomp.h |TLS
--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to jyong from comment #14)
> Doing some simple testcases, looks like generates:
>
> movl %gs:0, %eax
> movl _a@ntpoff(%eax), %eax
>
> While MSVC does (Intel syntax):
> mov ecx, DWORD PTR __tls_index
> mov eax, DWORD PTR fs:__tls_array
> mov eax, DWORD PTR [eax+ecx*4]
> mov eax, DWORD PTR _a[eax]
>
> For a statement "return a;" where a is a thread local integer.
> I'm not sure how to modify the machine definition to emit this.
Do Windows/mingw have multiple TLS models, e.g. different for shared libraries
vs. executables, and different cases for static vs. exported variables, or is
everything done the same way, the &{fs/gs}:__tls_array[__tls_index] computation
sufficient to be done once in the whole function that needs TLS and that
returns a pointer to what use the .tls section relative symbols.
All I could find quickly is:
http://lists.llvm.org/pipermail/llvm-dev/2011-December/045886.html
http://www.nynaeve.net/?p=185
In any case, to implement it I think you'd want TARGET_WIN_TLS (or some better
name next to TARGET_SUN_TLS, TARGET_GNU_TLS and TARGET_GNU2_TLS), associated
command line switches and option handling setting the default, and then do
something with it in legitimize_tls_address and ix86_delegitimize_tls_address.
I also fail to see why this is tracked as 7/8 Regression, given that the
Windows TLS really isn't implemented, --enable-tls is just a user error, this
can be turned into an enhancement request to implement Windows TLS.
In any case, I fail to
>From gcc-bugs-return-583678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 09:06:28 2017
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Subject: [Bug fortran/83230] [8 regression] segmentation fault in bind C C/C++
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
Summary|[8.0 regression] |[8 regression] segmentation
|segmentation fault in bind |fault in bind C C/C++
|C C/C++ |
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Subject: [Bug tree-optimization/83233] [8 Regression] gimple-ssa-store-merging.c:183:3: warning: unnamed type with no linkage used to declare variable with linkage
Date: Fri, 01 Dec 2017 09:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83233
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
>From gcc-bugs-return-583679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 09:10:25 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83232] fma3d spec2000 regression on zen with -Ofast (generic tuning) after r255268 by missed SLP oppurtunity
Date: Fri, 01 Dec 2017 09:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83232
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-12-01
Version|unknown |8.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I belive group detection is confused by those
einc[4] = 0.0;
einc[5] = 0.0;
after the vector code. Like we don't SLP vectorize
double a[2];
double b[2];
void foo (double *p, double *q)
{
a[0] = b[0];
a[1] = b[1];
*p = *q;
a[0] = b[1];
a[1] = b[0];
}
I have an idea how to fix that. Have to first confirm this is the fma3d issue.
>From gcc-bugs-return-583681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 09:19:45 2017
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Subject: [Bug tree-optimization/83232] fma3d spec2000 regression on zen with -Ofast (generic tuning) after r255268 by missed SLP oppurtunity
Date: Fri, 01 Dec 2017 09:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83232
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testcase:
SUBROUTINE MATERIAL_41_INTEGRATION ( STRESS,YLDC,EFPS,
&
& DTnext,Dxx,Dyy,Dzz,Dxy,Dxz,Dyz,MatID,P1,P3 )
REAL(KIND(0D0)), INTENT(INOUT) :: STRESS(6)
REAL(KIND(0D0)), INTENT(IN) :: DTnext
REAL(KIND(0D0)), INTENT(IN) :: Dxx,Dyy,Dzz,Dxy,Dxz,Dyz
REAL(KIND(0D0)) :: Einc(6)
REAL(KIND(0D0)) :: P1,P3
Einc(1) = DTnext * Dxx
Einc(2) = DTnext * Dyy
Einc(3) = DTnext * Dzz
Einc(4) = DTnext * Dxy
Einc(5) = DTnext * Dxz
Einc(6) = DTnext * Dyz
DO i = 1,6
STRESS(i) = STRESS(i) + P3*Einc(i)
ENDDO
STRESS(1) = STRESS(1) + (DTnext * P1 * (Dxx+Dyy+Dzz))
STRESS(2) = STRESS(2) + (DTnext * P1 * (Dxx+Dyy+Dzz))
STRESS(3) = 0.0
Einc(5) = 0.0
Einc(6) = 0.0
WRITE (*,*) Einc
END SUBROUTINE
>From gcc-bugs-return-583682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 09:27:31 2017
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Subject: [Bug tree-optimization/80726] [7/8 Regression] Destructor not inlined anymore (regression)
Date: Fri, 01 Dec 2017 09:27:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Strange, I see it not inlined with -O3 only starting with r254724 on
x86_64-linux.
I bet it is related to:
if (cur_node->same_comdat_group)
{
/* TODO: call is versionable if we make sure that all
callers are inside of a comdat group. */
cur_node->calls_comdat_local = 1;
node->add_to_same_comdat_group (cur_node);
}
I think not inlining the whole destructor is desirable, the throw stuff is
unnecessarily large and cold. What I don't understand is why we'd want to emit
the _ZN3FooD2Ev.part.0 function inside of any comdat section, that is obviously
something we can't do (e.g. because not all TUs that emit the destructor would
emit _ZN3FooD2Ev.part.0 too or some could emit .part.24 etc.) and that is why
inlining fails. Can't we just emit a static _ZN3FooD2Ev.part.0 function in the
text section instead?
>From gcc-bugs-return-583683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 09:38:57 2017
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Subject: [Bug middle-end/82365] stack locations are consolidated if noreturn function is on the path
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--- Comment #8 from Arnd Bergmann <arnd at linaro dot org> ---
I noticed that I never resubmitted my workaround for the kernel for this
problem, and nothing happened on the gcc side either. To make sure I capture
the situation correctly in the kernel patch changelog, could I get an
clarification on whether this is something the gcc developers think might get
addressed before the gcc-8 release, or whether I should assume it is too minor
to take up anyone's time?
>From gcc-bugs-return-583684-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 10:36:14 2017
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Subject: [Bug tree-optimization/83238] New: [8 Regression] [graphite] ICE in graphite_can_represent_scev, at graphite-scop-detection.c:971
Date: Fri, 01 Dec 2017 10:36:00 -0000
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Bug ID: 83238
Summary: [8 Regression] [graphite] ICE in
graphite_can_represent_scev, at
graphite-scop-detection.c:971
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Target Milestone: ---
gcc-8.0.0-alpha20171126 snapshot (r255155) ICEs when compiling the following
snippet w/ -O2 -floop-parallelize-all:
void
vw (int *dk, int zd, int jb)
{
int sq;
int *kv = &sq;
for (sq = 0; sq < 2; ++sq)
{
int u1;
for (u1 = 0; u1 < 5; ++u1)
if (zd == 0)
return;
}
for (;;)
{
++zd;
if (zd == 0)
while (jb != 0)
kv = &jb;
while (*dk < 1)
{
for (jb = 0; jb < 2; ++jb)
{
}
++*dk;
}
for (*kv = 0; *kv < 2; ++*kv)
for (*dk = 0; *dk < 2; ++*dk)
{
}
}
}
% gcc-8.0.0-alpha20171126 -O2 -floop-parallelize-all -w -c kgclon2i.c
during GIMPLE pass: graphite
kgclon2i.c: In function 'vw':
kgclon2i.c:2:1: internal compiler error: in graphite_can_represent_scev, at
graphite-scop-detection.c:971
vw (int *dk, int zd, int jb)
^~
0x13f337e graphite_can_represent_scev
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:970
0x7e6c4e graphite_can_represent_expr
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:999
0x7e6c4e stmt_simple_for_scop_p
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:1104
0x7e6c4e harmful_loop_in_region
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:768
0x13f4177 build_scop_depth
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:637
0x13f3df2 build_scop_depth
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:628
0x13f4a31 build_scops(vec<scop*, va_heap, vl_ptr>*)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:1658
0x13eb36d graphite_transform_loops()
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite.c:364
0x13ec4c0 graphite_transforms
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite.c:447
0x13ec4c0 execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite.c:524
>From gcc-bugs-return-583685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 10:47:17 2017
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Subject: [Bug target/80583] [6/7/8 Regression] ICE with target attribute and vectorized float: internal compiler error: in convert_move, at expr.c:270
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What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42763
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42763&action=edit
gcc8-pr80583.patch
Untested fix.
>From gcc-bugs-return-583686-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 10:48:46 2017
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Subject: [Bug target/78643] [6/7/8 Regression] ICE in convert_move, at expr.c:230
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42764
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42764&action=edit
gcc8-pr80583.patch
Untested fix.
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Subject: [Bug tree-optimization/81165] [8 Regression] Regression in GCC-8.0.0's optimizer
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--- Comment #6 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> we miss to optimize (int)((short int)((unsigned short) x1.1_4 ^ 8) & 1) to
> (int)(x1.1_4 & 1) as well.
(untested)
+/* (X |^ 8) & 1 --> X & 1 */
+(for op (bit_ior bit_xor)
+ (simplify
+ (bit_and:c (convert?@4 (op:c@3 @0 (with_possible_nonzero_bits2@1 @1z)))
+ (with_possible_nonzero_bits2@2 @2z))
+ (if (wi::bit_and
+ (wide_int::from (get_nonzero_bits (@1z), TYPE_PRECISION (type),
+ TYPE_SIGN (TREE_TYPE (@1))),
+ get_nonzero_bits (@2z)) == 0
+ && single_use (@3) && single_use (@4))
+ (bit_and (convert @0) @2))))
>From gcc-bugs-return-583688-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 10:53:35 2017
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Subject: [Bug rtl-optimization/80463] [6/7/8 Regression] ICE with -fselective-scheduling2 and -fvar-tracking-assignments
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Any progress with this?
>From gcc-bugs-return-583690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 11:01:41 2017
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From: "TonyELewis at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83239] New: False positive from -Wstringop-overflow on simple std::vector code
Date: Fri, 01 Dec 2017 11:01:00 -0000
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Bug ID: 83239
Summary: False positive from -Wstringop-overflow on simple
std::vector code
Product: gcc
Version: 8.0
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Created attachment 42765
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42765&action=edit
Pre-processed (-save-temps) on GCC 7.2.0 [Ubuntu 17.10]
Compiling this:
#include <vector>
void fn() {
std::vector<int> a;
int num = 2;
while ( num > 0 ) {
const auto a_size = a.size();
if ( a_size < 3 ) {
a.assign( 1, 0 );
}
else {
a.resize( a_size - 2 ); // <-- I think problem is here
}
--num;
}
}
...with `g++ -O3 -Wall -Werror a.cpp` results in:
In function ‘void fn()’:
cc1plus: error: ‘void* __builtin_memset(void*, int, long unsigned int)’:
specified size 18446744073709551608 exceeds maximum object size
9223372036854775807 [-Werror=stringop-overflow=]
cc1plus: all warnings being treated as errors
I think this is a problem for three reasons:
1. the warning doesn't tell me the location of the problem
2. worse, the warning name "stringop-overflow" is actively misleading because
the code containing the problem isn't using strings
3. the warning is wrong: AFAIU, it's complaining about `a_size - 2`
potentially being a huge unsigned integer due to wrapping below 0 but it's in
an else clause that only executes if `a_size >= 3`.
I'm seeing this problem on both GCC 8.0.0 20171130 (Godbolt) and GCC 7.2.0 (my
Ubuntu).
Though there are other open bugs relating to this warning:
* bug 79929
* bug 82076
* bug 82103
* bug 82646
...I'm not sure any cover this issue (eg the first one is about Fortran).
Thanks very much.
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Subject: [Bug rtl-optimization/80463] [6/7/8 Regression] ICE with -fselective-scheduling2 and -fvar-tracking-assignments
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--- Comment #6 from Andrey Belevantsev <abel at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #5)
> Any progress with this?
I can make a patch for the dependency problem. I'm not sure what happened to
the hot/cold block partitioning verification code -- I've heard Honza was going
to remove it (or I have misinterpreted what Alex told me). It is unrelated to
the dependence issue but is serious enough -- it's didn't allow me to test with
sel-sched enabled at the time.
>From gcc-bugs-return-583692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 11:04:42 2017
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Subject: [Bug rtl-optimization/80463] [6/7/8 Regression] ICE with -fselective-scheduling2 and -fvar-tracking-assignments
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
CCing Honza.
>From gcc-bugs-return-583693-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 11:25:40 2017
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From: "gson at gson dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83240] New: x86_64 vectorized sqrt of denormal yields -inf when DAZ=0
Date: Fri, 01 Dec 2017 11:25:00 -0000
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Bug ID: 83240
Summary: x86_64 vectorized sqrt of denormal yields -inf when
DAZ=0
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Created attachment 42766
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42766&action=edit
Preprocessed source
When compiling for x95_64 with -O3 -ffast-math, gcc vectorizes square roots of
single-precision floats into SSE code using the rsqrtps instruction followed by
a Newton-Raphson step to calculate four square roots in one go. This code
returns incorrect results (-infinity rather than zero) for denormal inputs when
the DAZ (Denormals Are Zero) flag is not set.
On Linux, if the -ffast-math option is also given at the link stage, the DAZ
flag is set by crtfastmath.o, and the problem does not occur. However, if
-ffast-math is used when compiling library code, it is difficult to guarantee
that the link stage, which may be under the control of an entirely different
software project, also uses the -ffast-math option. Also, some systems do not
currently support crtfastmath.o at all (see http://gnats.netbsd.org/50940).
Therefore, it seems to me that code built with -ffast-math ought to work
correctly (even if not with optimal performance) whether DAZ is set or not. Or
conversely, if there is an intentional requirement that DAZ must be set when
executing code compiled with -ffast-math, this requirement ought to be clearly
and prominently documented.
The attached test program demonstrates the issue. Compile and run it as
follows (using a separate compile and link stage to suppress the use of
crtfastmath.o):
gcc -c -O3 -ffast-math test_denormal.i
gcc test_denormal.o -lm -o test_denormal
./test_denormal
This issue affects a wide range of gcc versions, including 6.3.0 and the
current SVN trunk (r255277).
>From gcc-bugs-return-583694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 11:31:35 2017
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Subject: [Bug tree-optimization/80198] [6/7/8 Regression] does not vectorize generic inplace integer operation
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #10)
> Yea. The code that was recording NAME = NAME conditional equivalences was
> largely disabled back in August. They'll only be recorded now if one name
> is cheaper to compute than the other.
>
> So if the conditional equivalences are still a problem with this BZ, then we
> need to look at the costing of the SSA_NAME's defining statement.
Yes, they are still the problem.
Before r233207, dom changed:
if (a_6(D) == b_7(D))
goto <bb 3>;
...
<bb 6>:
# i_40 = PHI <i_36(3), i_18(8)>
# DEBUG i => i_40
_9 = (long unsigned int) i_40;
_10 = _9 * 4;
- _11 = a_6(D) + _10;
- _13 = b_7(D) + _10;
- _14 = *_13;
+ _11 = b_7(D) + _10;
+ _13 = _11;
+ _14 = *_11;
_16 = _14 | c_15(D);
*_11 = _16;
But that doesn't happen even with current trunk, we still end up with both a
and b in the bb dominated by a == b test.
Another part of this PR is being able to determine in the vectorizer if we can
allow identical pointers or not (in this case we can, so we could adjust the
alias check by 1).
>From gcc-bugs-return-583695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 11:34:47 2017
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Subject: [Bug c++/83239] False positive from -Wstringop-overflow on simple std::vector code
Date: Fri, 01 Dec 2017 11:34:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
It is strongly related to the other PRs. IMO, all warnings like
maybe-uninitialized should move from Wall to Wextra, but that's going to be a
hard sell.
In the mean time, we fail to find some VRP optimizations that might help with
the warning.
_1 = _186 + 18446744073709551614;
if (_1 > _186)
_186: [3, +INF]
Possibly because we haven't turned it into ADD_OVERFLOW yet (or because we are
missing a specific transform, or because we have one in match.pd but don't call
it, or because !single_use, I didn't check), we don't fold that to false.
>From gcc-bugs-return-583696-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 11:42:58 2017
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Subject: [Bug c++/80135] [6/7/8 Regression] ICE in output_constructor_regular_field, at varasm.c:4968
Date: Fri, 01 Dec 2017 11:42:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, shall we just error out on this? I'm afraid I don't see what else can be
done with this, we can only really initialize a flexible array member with
non-empty data if it is at the very end of the object, if it is in the middle
of an array or structure, even if we were silent in the past, we'd just emit a
bogus initializer.
GCC 5 rejected this bogosity:
pr80135.C:6:1: error: too many initializers for ‘int [0]’
So, the actual bug is in r231665 that started accepting this, it should have
never been accepted, not r234636 that just started asserting sane IL that
r231665 didn't produce.
>From gcc-bugs-return-583697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 11:45:56 2017
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Subject: [Bug c/82695] gnu gcc (4.8 - 7.1) cannot parse some system headers in macOS (10.12)
Date: Fri, 01 Dec 2017 11:45:00 -0000
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--- Comment #2 from Ev Drikos <drikosev at gmail dot com> ---
The patch in PR/69960 indeed solves the problem described in PR/69960.
I'll wait until next gcc release to see if it also solves the problem described
in this PR.
Thanks,
Ev. Drikos
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Subject: [Bug middle-end/82878] [7 Regression] ICE in assign_temp, at function.c:968 when using optimization
Date: Fri, 01 Dec 2017 11:50:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Well, not fixed on the 7 branch, right?
>From gcc-bugs-return-583700-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 11:51:07 2017
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Subject: [Bug middle-end/82878] [7 Regression] ICE in assign_temp, at function.c:968 when using optimization
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 79989 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-583701-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 11:51:13 2017
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Subject: [Bug other/65530] [meta-bug] -mmpx -fcheck-pointer-bounds failures
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Bug 65530 depends on bug 79989, which changed state.
Bug 79989 Summary: [7/8 Regression][CHKP] ICE in assign_temp, at function.c:968
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79989
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Subject: [Bug middle-end/79989] [7/8 Regression][CHKP] ICE in assign_temp, at function.c:968
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This was fixed with r254958.
*** This bug has been marked as a duplicate of bug 82878 ***
>From gcc-bugs-return-583702-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 12:02:19 2017
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From: "arnd at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83241] New: [8 regression] segmentation fault in dce
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Bug ID: 83241
Summary: [8 regression] segmentation fault in dce
Product: gcc
Version: 8.0
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: arnd at linaro dot org
Target Milestone: ---
I ran into this internal compiler error with today's gcc checkout (r255300),
both x86 and arm.
x86_64-linux-gcc-8.0.0 -xc -c -O2 - <<EOF
typedef struct {
int in_mb;
short mb[32];
} mbx_cmd_t;
struct qla_hw_data {
volatile int flags;
int md_tmplt_hdr_dma;
} a;
mbx_cmd_t b;
void fn1() {
struct qla_hw_data c = a;
b.mb[0] = b.mb[1] = 6;
b.mb[4] = c.md_tmplt_hdr_dma;
b.mb[5] = c.md_tmplt_hdr_dma >> 16;
b.in_mb = 1;
}
EOF
during GIMPLE pass: dce
<stdin>: In function 'fn1':
<stdin>:10:6: internal compiler error: Segmentation fault
0xab19cf crash_signal
/home/arnd/git/gcc/gcc/toplev.c:325
0xb8a220 gimple_code
/home/arnd/git/gcc/gcc/gimple.h:1677
0xb8a220 gimple_nop_p
/home/arnd/git/gcc/gcc/gimple.h:6294
0xb8a220 walk_aliased_vdefs_1
/home/arnd/git/gcc/gcc/tree-ssa-alias.c:2897
0xb8a3e1 walk_aliased_vdefs(ao_ref*, tree_node*, bool (*)(ao_ref*, tree_node*,
void*), void*, bitmap_head**, bool*, unsigned int)
/home/arnd/git/gcc/gcc/tree-ssa-alias.c:2951
0xb9e2a4 mark_aliased_reaching_defs_necessary
/home/arnd/git/gcc/gcc/tree-ssa-dce.c:526
0xb9fa82 propagate_necessity
/home/arnd/git/gcc/gcc/tree-ssa-dce.c:892
0xba27b8 perform_tree_ssa_dce
/home/arnd/git/gcc/gcc/tree-ssa-dce.c:1606
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/78869] [6/7/8 Regression] Strange __builtin_memcpy optimisations
Date: Fri, 01 Dec 2017 12:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78869
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems to have been fixed by r247104.
*** This bug has been marked as a duplicate of bug 80293 ***
>From gcc-bugs-return-583704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 12:05:11 2017
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Subject: [Bug tree-optimization/80293] [6/7 Regression] unnecessary code at -O2 (-O1 is fine)
Date: Fri, 01 Dec 2017 12:05:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tvrtko.ursulin at linux dot intel.
| |com
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 78869 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-583705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 12:39:33 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/82365] stack locations are consolidated if noreturn function is on the path
Date: Fri, 01 Dec 2017 12:39:00 -0000
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--- Comment #9 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 1 Dec 2017, arnd at linaro dot org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82365
>
> --- Comment #8 from Arnd Bergmann <arnd at linaro dot org> ---
> I noticed that I never resubmitted my workaround for the kernel for this
> problem, and nothing happened on the gcc side either. To make sure I capture
> the situation correctly in the kernel patch changelog, could I get an
> clarification on whether this is something the gcc developers think might get
> addressed before the gcc-8 release, or whether I should assume it is too minor
> to take up anyone's time?
Too complicated at this point for questionable gain (easy source
workaround possible).
>From gcc-bugs-return-583706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 12:40:30 2017
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From: "paul.k.romano at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83235] IAND sometimes doesn't take bitwise-and of sign bit with -O2
Date: Fri, 01 Dec 2017 12:40:00 -0000
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--- Comment #3 from Paul Romano <paul.k.romano at gmail dot com> ---
Thank you both for your quick responses. I understand that the bit model for
negative numbers is undefined and that x*x overflows and is thus also
undefined. However, the second argument to IAND is well-defined: it's a bit
mask with only the most significant bit zeroed. I would have thought that this
would guarantee that the resulting number would have its most significant bit
zeroed, regardless of whatever was passed as the first argument to IAND. Is
there really no way to guarantee that?
>From gcc-bugs-return-583707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 12:52:50 2017
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From: "benni.buch at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82249] [8 Regression] wrong mismatched argument pack lengths + ICE
Date: Fri, 01 Dec 2017 12:52:00 -0000
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--- Comment #2 from Benjamin Buch <benni.buch at gmail dot com> ---
The ICE is fixed in trunk, but the wrong argument pack lengths mismatch does
still exist:
constexpr auto calc = [](auto, auto dim)noexcept{ return dim; };
template < typename ... Ds >
constexpr auto f(Ds ...)noexcept{
return [](auto ... n){ return (calc(n, Ds{}), ...); }(Ds{} ...);
}
int main(){
f(); // Wrong error
f(0); // OK
f(0, 0); // Wrong error
}
$ g++ -std=c++1z main.cpp
main.cpp: In instantiation of 'constexpr auto f(Ds ...) [with Ds = {}]':
main.cpp:9:7: required from here
main.cpp:5:57: error: mismatched argument pack lengths while expanding 'calc(n,
Ds{})'
return [](auto ... n){ return (calc(n, Ds{}), ...); }(Ds{} ...);
^
main.cpp: In instantiation of 'constexpr auto f(Ds ...) [with Ds = {int,
int}]':
main.cpp:11:11: required from here
main.cpp:5:57: error: mismatched argument pack lengths while expanding 'calc(n,
Ds{})'
$ g++ --version
g++ (GCC) 8.0.0 20171201 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>From gcc-bugs-return-583708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 13:00:41 2017
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Subject: [Bug c++/81676] Wrong warning with unused-but-set-parameter within 'if constexpr'
Date: Fri, 01 Dec 2017 13:00:00 -0000
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--- Comment #2 from Benjamin Buch <benni.buch at gmail dot com> ---
Does still exist in:
$ g++ --version
g++ (GCC) 8.0.0 20171201 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>From gcc-bugs-return-583709-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 13:05:42 2017
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From: "benni.buch at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83242] New: Never executed "throw" in constexpr function fails to compile
Date: Fri, 01 Dec 2017 13:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83242
Bug ID: 83242
Summary: Never executed "throw" in constexpr function fails to
compile
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Target Milestone: ---
constexpr int f(){
if(true) return 0;
throw 0;
}
int main(){
constexpr auto i = f();
}
Probably related to Bug 67371
$ g++ -std=c++14 main.cpp
main.cpp: In function 'constexpr int f()':
main.cpp:3:11: error: expression '<throw-expression>' is not a constant
expression
throw 0;
^
main.cpp: In function 'int main()':
main.cpp:7:25: error: 'constexpr int f()' called in a constant expression
constexpr auto i = f();
~^~
$ g++ --version
g++ (GCC) 8.0.0 20171201 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>From gcc-bugs-return-583710-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 13:23:26 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83235] IAND sometimes doesn't take bitwise-and of sign bit with -O2
Date: Fri, 01 Dec 2017 13:23:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is a bad understanding of what undefined behavior means. After you invoke
undefined behavior anywhere in your program, anything can happen, there are no
constraints on what can happen.
>From gcc-bugs-return-583711-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 13:28:21 2017
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From: "paul.k.romano at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83235] IAND sometimes doesn't take bitwise-and of sign bit with -O2
Date: Fri, 01 Dec 2017 13:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83235
--- Comment #5 from Paul Romano <paul.k.romano at gmail dot com> ---
Got it; thanks for the clarification, and sorry for the noise! Guess I'll just
have to stop relying on this "feature" of previous versions.
>From gcc-bugs-return-583712-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 13:34:18 2017
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Subject: [Bug tree-optimization/83232] fma3d spec2000 regression on zen with -Ofast (generic tuning) after r255268 by missed SLP oppurtunity
Date: Fri, 01 Dec 2017 13:34:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Dec 1 13:33:40 2017
New Revision: 255307
URL: https://gcc.gnu.org/viewcvs?rev=255307&root=gcc&view=rev
Log:
2017-12-01 Richard Biener <rguenther@suse.de>
PR tree-optimization/83232
* tree-vect-data-refs.c (vect_analyze_data_ref_accesses): Fix
detection of same access. Instead of breaking the group here
do not consider the duplicate. Add comment explaining real fix.
* gfortran.dg/vect/pr83232.f90: New testcase.
Added:
trunk/gcc/testsuite/gfortran.dg/vect/pr83232.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c
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Subject: [Bug sanitizer/79096] [7/8 Regression] address sanitizer and jni does not work
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://bugs.llvm.org/show_
| |bug.cgi?id=31861
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Still unresolved upstream, so might not make into GCC8 either.
>From gcc-bugs-return-583715-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:27:11 2017
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Subject: [Bug libgcc/83103] Improve __mulkc3 and __divkc3 on Power9
Date: Fri, 01 Dec 2017 14:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83103
--- Comment #4 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri Dec 1 14:26:31 2017
New Revision: 255309
URL: https://gcc.gnu.org/viewcvs?rev=255309&root=gcc&view=rev
Log:
2017-12-01 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from trunk
2017-11-30 Michael Meissner <meissner@linux.vnet.ibm.com>
PR libgcc/83112
* config/rs6000/float128-ifunc.c (__addkf3_resolve): Use the
correct type for all ifunc resolvers to silence -Wattribute-alias
warnings. Eliminate the forward declaration of the resolver
functions which is no longer needed.
(__subkf3_resolve): Likewise.
(__mulkf3_resolve): Likewise.
(__divkf3_resolve): Likewise.
(__negkf2_resolve): Likewise.
(__eqkf2_resolve): Likewise.
(__nekf2_resolve): Likewise.
(__gekf2_resolve): Likewise.
(__gtkf2_resolve): Likewise.
(__lekf2_resolve): Likewise.
(__ltkf2_resolve): Likewise.
(__unordkf2_resolve): Likewise.
(__extendsfkf2_resolve): Likewise.
(__extenddfkf2_resolve): Likewise.
(__trunckfsf2_resolve): Likewise.
(__trunckfdf2_resolve): Likewise.
(__fixkfsi_resolve): Likewise.
(__fixkfdi_resolve): Likewise.
(__fixunskfsi_resolve): Likewise.
(__fixunskfdi_resolve): Likewise.
(__floatsikf_resolve): Likewise.
(__floatdikf_resolve): Likewise.
(__floatunsikf_resolve): Likewise.
(__floatundikf_resolve): Likewise.
(__extendkftf2_resolve): Likewise.
(__trunctfkf2_resolve): Likewise.
PR libgcc/83103
* config/rs6000/quad-float128.h (TF): Don't define if long double
is IEEE 128-bit floating point.
(TCtype): Define as either TCmode or KCmode, depending on whether
long double is IEEE 128-bit floating point.
(__mulkc3_sw): Add declarations for software/hardware versions of
complex multiply/divide.
(__divkc3_sw): Likewise.
(__mulkc3_hw): Likewise.
(__divkc3_hw): Likewise.
* config/rs6000/_mulkc3.c (_mulkc3): If we are building ifunc
handlers to switch between using software emulation and hardware
float128 instructions, build the complex multiply/divide functions
for both software and hardware support.
* config/rs6000/_divkc3.c (_divkc3): Likewise.
* config/rs6000/float128-ifunc.c (__mulkc3_resolve): Likewise.
(__divkc3_resolve): Likewise.
(__mulkc3): Likewise.
(__divkc3): Likewise.
* config/rs6000/t-float128-hw (fp128_hardfp_src): Likewise.
(fp128_hw_src): Likewise.
(fp128_hw_static_obj): Likewise.
(fp128_hw_shared_obj): Likewise.
(_mulkc3-hw.c): Likewise.
(_divkc3-hw.c): Likewise.
* config/rs6000/t-float128 (clean-float128): Delete _mulkc3-hw.c
and _divkc3-hw.c.
Modified:
branches/ibm/gcc-7-branch/libgcc/ChangeLog.ibm
branches/ibm/gcc-7-branch/libgcc/config/rs6000/_divkc3.c
branches/ibm/gcc-7-branch/libgcc/config/rs6000/_mulkc3.c
branches/ibm/gcc-7-branch/libgcc/config/rs6000/float128-ifunc.c
branches/ibm/gcc-7-branch/libgcc/config/rs6000/quad-float128.h
branches/ibm/gcc-7-branch/libgcc/config/rs6000/t-float128
branches/ibm/gcc-7-branch/libgcc/config/rs6000/t-float128-hw
>From gcc-bugs-return-583714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:27:11 2017
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/83112] Silence warnings from PowerPC libgcc float128-ifunc.c compilation
Date: Fri, 01 Dec 2017 14:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83112
--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri Dec 1 14:26:31 2017
New Revision: 255309
URL: https://gcc.gnu.org/viewcvs?rev=255309&root=gcc&view=rev
Log:
2017-12-01 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from trunk
2017-11-30 Michael Meissner <meissner@linux.vnet.ibm.com>
PR libgcc/83112
* config/rs6000/float128-ifunc.c (__addkf3_resolve): Use the
correct type for all ifunc resolvers to silence -Wattribute-alias
warnings. Eliminate the forward declaration of the resolver
functions which is no longer needed.
(__subkf3_resolve): Likewise.
(__mulkf3_resolve): Likewise.
(__divkf3_resolve): Likewise.
(__negkf2_resolve): Likewise.
(__eqkf2_resolve): Likewise.
(__nekf2_resolve): Likewise.
(__gekf2_resolve): Likewise.
(__gtkf2_resolve): Likewise.
(__lekf2_resolve): Likewise.
(__ltkf2_resolve): Likewise.
(__unordkf2_resolve): Likewise.
(__extendsfkf2_resolve): Likewise.
(__extenddfkf2_resolve): Likewise.
(__trunckfsf2_resolve): Likewise.
(__trunckfdf2_resolve): Likewise.
(__fixkfsi_resolve): Likewise.
(__fixkfdi_resolve): Likewise.
(__fixunskfsi_resolve): Likewise.
(__fixunskfdi_resolve): Likewise.
(__floatsikf_resolve): Likewise.
(__floatdikf_resolve): Likewise.
(__floatunsikf_resolve): Likewise.
(__floatundikf_resolve): Likewise.
(__extendkftf2_resolve): Likewise.
(__trunctfkf2_resolve): Likewise.
PR libgcc/83103
* config/rs6000/quad-float128.h (TF): Don't define if long double
is IEEE 128-bit floating point.
(TCtype): Define as either TCmode or KCmode, depending on whether
long double is IEEE 128-bit floating point.
(__mulkc3_sw): Add declarations for software/hardware versions of
complex multiply/divide.
(__divkc3_sw): Likewise.
(__mulkc3_hw): Likewise.
(__divkc3_hw): Likewise.
* config/rs6000/_mulkc3.c (_mulkc3): If we are building ifunc
handlers to switch between using software emulation and hardware
float128 instructions, build the complex multiply/divide functions
for both software and hardware support.
* config/rs6000/_divkc3.c (_divkc3): Likewise.
* config/rs6000/float128-ifunc.c (__mulkc3_resolve): Likewise.
(__divkc3_resolve): Likewise.
(__mulkc3): Likewise.
(__divkc3): Likewise.
* config/rs6000/t-float128-hw (fp128_hardfp_src): Likewise.
(fp128_hw_src): Likewise.
(fp128_hw_static_obj): Likewise.
(fp128_hw_shared_obj): Likewise.
(_mulkc3-hw.c): Likewise.
(_divkc3-hw.c): Likewise.
* config/rs6000/t-float128 (clean-float128): Delete _mulkc3-hw.c
and _divkc3-hw.c.
Modified:
branches/ibm/gcc-7-branch/libgcc/ChangeLog.ibm
branches/ibm/gcc-7-branch/libgcc/config/rs6000/_divkc3.c
branches/ibm/gcc-7-branch/libgcc/config/rs6000/_mulkc3.c
branches/ibm/gcc-7-branch/libgcc/config/rs6000/float128-ifunc.c
branches/ibm/gcc-7-branch/libgcc/config/rs6000/quad-float128.h
branches/ibm/gcc-7-branch/libgcc/config/rs6000/t-float128
branches/ibm/gcc-7-branch/libgcc/config/rs6000/t-float128-hw
>From gcc-bugs-return-583716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:27:47 2017
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83236] "Did you mean" suggestions maybe shouldn't offer implementation-private names
Date: Fri, 01 Dec 2017 14:27:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-12-01
Assignee|unassigned at gcc dot gnu.org |dmalcolm at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Confirmed. Thanks for filing this.
>From gcc-bugs-return-583717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:33:07 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83240] x86_64 vectorized sqrt of denormal yields -inf when DAZ=0
Date: Fri, 01 Dec 2017 14:33:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
DAZ is a separate "optimization" so while it interacts with how we handle
square roots one isn't dependent on the other. Simply don't use -ffast-math if
you
are dealing with stuff like denormals.
>From gcc-bugs-return-583718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:35:01 2017
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From: "jan.kratochvil at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug driver/83243] New: -fuse-ld=lld
Date: Fri, 01 Dec 2017 14:35:00 -0000
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Bug ID: 83243
Summary: -fuse-ld=lld
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
Assignee: unassigned at gcc dot gnu.org
Reporter: jan.kratochvil at redhat dot com
Target Milestone: ---
There is already:
-fuse-ld=bfd
-fuse-ld=gold
but missing:
-fuse-ld=lld
-rwxr-xr-x 1 root root 1279512 Aug 2 20:35 /usr/bin/ld.bfd*
-rwxr-xr-x 1 root root 3303248 Aug 2 20:35 /usr/bin/ld.gold*
lrwxrwxrwx 1 root root 3 Aug 4 00:04 /usr/bin/ld.lld -> lld*
$ rpm -qf /usr/bin/ld.*
binutils-2.29-6.fc27.x86_64
binutils-2.29-6.fc27.x86_64
lld-4.0.1-4.fc27.x86_64
https://lld.llvm.org/
>From gcc-bugs-return-583719-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:35:56 2017
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Subject: [Bug driver/56062] Enhance -fuse-ld= option
Date: Fri, 01 Dec 2017 14:35:00 -0000
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Jan Kratochvil <jan.kratochvil at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jan.kratochvil at redhat dot com
--- Comment #5 from Jan Kratochvil <jan.kratochvil at redhat dot com> ---
A use case would be: -fuse-ld=lld
>From gcc-bugs-return-583720-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:36:22 2017
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Subject: [Bug tree-optimization/83177] [7/8 Regression] ICE with -mmpx -fcheck-pointer-bounds + __builtin___bnd_narrow_ptr_bounds + _setjmp
Date: Fri, 01 Dec 2017 14:36:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase below. Started with r224643.
/* PR tree-optimization/83177 */
/* { dg-do compile } */
/* { dg-options "-mmpx -fcheck-pointer-bounds" } */
extern int setjmp (void *);
void *buf[64];
void bar (void);
int
foo (int *a)
{
int i, r = 0;
for (i = 0; i < 64; ++i)
{
bar ();
r += *--a;
bar ();
}
for (i = 0; i < 64; ++i)
{
r += *a;
setjmp (buf);
bar ();
}
return r;
}
>From gcc-bugs-return-583721-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:37:21 2017
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Subject: [Bug tree-optimization/83238] [8 Regression] [graphite] ICE in graphite_can_represent_scev, at graphite-scop-detection.c:971
Date: Fri, 01 Dec 2017 14:37:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-12-01
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine. Some SCEV analysis issue. The SESE region starts with loop A exit
and ends with the edge to the latch of a sibling B loop of A. Somehow
SCEV instantiation thinks B is contained in the SESE region.
>From gcc-bugs-return-583722-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:38:02 2017
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Subject: [Bug tree-optimization/83238] [8 Regression] [graphite] ICE in graphite_can_represent_scev, at graphite-scop-detection.c:971
Date: Fri, 01 Dec 2017 14:38:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
OTOH we do have a side-entry into this "SESE" region, the latch edge of loop B.
Thus this isn't really a SESE region(?!).
>From gcc-bugs-return-583723-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:40:49 2017
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Subject: [Bug tree-optimization/83241] [8 regression] ICE in verify_use after store-merging
Date: Fri, 01 Dec 2017 14:40:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-01
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|[8 regression] segmentation |[8 regression] ICE in
|fault in dce |verify_use after
| |store-merging
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
(gdb) p debug_tree (ssa_name)
<ssa_name 0x7ffff689cb88 nothrow public visited var <var_decl 0x7ffff69e4000
.MEM>
def_stmt
version:8 in-free-list>
$1 = void
some unlink_stmt_vdef () missing?
<bb 2> [local count: 1073741825]:
# .MEM_6 = VDEF <.MEM_5(D)>
c = a;
# VUSE <.MEM_8>
_13 = MEM[(int *)&c + 4B];
# VUSE <.MEM_6>
_1 = c.md_tmplt_hdr_dma;
_2 = (short int) _1;
_3 = _1 >> 16;
_4 = (short int) _3;
# .MEM_10 = VDEF <.MEM_6>
MEM[(short int *)&b + 12B] = _13;
...
>From gcc-bugs-return-583724-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:41:07 2017
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Subject: [Bug tree-optimization/83232] fma3d spec2000 regression on zen with -Ofast (generic tuning) after r255268 by missed SLP oppurtunity
Date: Fri, 01 Dec 2017 14:41:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Should be fixed.
>From gcc-bugs-return-583725-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:42:25 2017
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Subject: [Bug driver/83243] -fuse-ld=lld
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Last time when I checked, I can't use lld to build GCC with
LLD=/export/build/gnu/llvm-clang/release/opt/llvm/master/bin/ld.lld
--with-ld=$LLD --with-plugin-ld=$LLD
added to GCC configure.
>From gcc-bugs-return-583726-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:48:44 2017
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Subject: [Bug tree-optimization/83241] [8 regression] ICE in verify_use after store-merging
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83241
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
>From gcc-bugs-return-583727-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 14:56:15 2017
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Subject: [Bug tree-optimization/83238] [8 Regression] [graphite] ICE in graphite_can_represent_scev, at graphite-scop-detection.c:971
Date: Fri, 01 Dec 2017 14:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83238
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testing obvious patch (make code match comment):
Index: gcc/graphite-scop-detection.c
===================================================================
--- gcc/graphite-scop-detection.c (revision 255309)
+++ gcc/graphite-scop-detection.c (working copy)
@@ -570,8 +570,7 @@ scop_detection::merge_sese (sese_l first
which post-dominates dom, until it stabilizes. Also, ENTRY->SRC and
EXIT->DEST should be in the same loop nest. */
if (!dominated_by_p (CDI_DOMINATORS, pdom, dom)
- || loop_depth (entry->src->loop_father)
- != loop_depth (exit->dest->loop_father))
+ || entry->src->loop_father != exit->dest->loop_father)
return invalid_sese;
/* For now we just bail out when there is a loop exit in the region
>From gcc-bugs-return-583728-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:06:33 2017
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Subject: [Bug fortran/82606] [PDT] ICE in gfc_extract_int, at fortran/expr.c:641
Date: Fri, 01 Dec 2017 15:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82606
--- Comment #9 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Fri Dec 1 15:05:55 2017
New Revision: 255311
URL: https://gcc.gnu.org/viewcvs?rev=255311&root=gcc&view=rev
Log:
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* resolve.c (get_pdt_constructor): Initialize 'cons' to NULL.
(resolve_pdt): Correct typo in prior comment. Emit an error if
any parameters are deferred and the object is neither pointer
nor allocatable.
PR fortran/82606
* decl.c (gfc_get_pdt_instance): Continue if the parameter sym
is not present or has no name. Select the parameter by name
of component, rather than component order. Remove all the other
manipulations of 'tail' when building the pdt instance.
(gfc_match_formal_arglist): Emit and error if a star is picked
up in a PDT decl parameter list.
PR fortran/82622
* trans-array.c (set_loop_bounds): If a GFC_SS_COMPONENT has an
info->end, use it rather than falling through to
gcc_unreachable.
(structure_alloc_comps): Check that param->name is non-null
before comparing with the component name.
* trans-decl.c (gfc_get_symbol_decl): Do not use the static
initializer for PDT symbols.
(gfc_init_default_dt): Do nothing for PDT symbols.
* trans-io.c (transfer_array_component): Parameterized array
components use the descriptor ubound since the shape is not
available.
PR fortran/82719
PR fortran/82720
* trans-expr.c (gfc_conv_component_ref): Do not use the charlen
backend_decl of pdt strings. Use the hidden component instead.
* trans-io.c (transfer_expr): Do not do IO on "hidden" string
lengths. Use the hidden string length for pdt string transfers
by adding it to the se structure. When finished nullify the
se string length.
PR fortran/82866
* decl.c (gfc_match_formal_arglist): If a name is not found or
star is found, while reading a type parameter list, emit an
immediate error.
(gfc_match_derived_decl): On reading a PDT parameter list, on
failure to match call gfc_error_recovery.
PR fortran/82978
* decl.c (build_struct): Character kind defaults to 1, so use
kind_expr whatever is the set value.
(gfc_get_pdt_instance): Ditto.
* trans-array.c (structure_alloc_comps): Copy the expression
for the PDT string length before parameter substitution. Use
this expression for evaluation and free it after use.
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* gfortran.dg/pdt_4.f03 : Incorporate the new error.
PR fortran/82606
* gfortran.dg/pdt_19.f03 : New test.
* gfortran.dg/pdt_21.f03 : New test.
PR fortran/82622
* gfortran.dg/pdt_20.f03 : New test.
* gfortran.dg/pdt_22.f03 : New test.
PR fortran/82719
PR fortran/82720
* gfortran.dg/pdt_23.f03 : New test.
PR fortran/82866
* gfortran.dg/pdt_24.f03 : New test.
PR fortran/82978
* gfortran.dg/pdt_10.f03 : Correct for error in coding the for
kind 4 component and change the kind check appropriately.
* gfortran.dg/pdt_25.f03 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pdt_19.f03
trunk/gcc/testsuite/gfortran.dg/pdt_20.f03
trunk/gcc/testsuite/gfortran.dg/pdt_21.f03
trunk/gcc/testsuite/gfortran.dg/pdt_22.f03
trunk/gcc/testsuite/gfortran.dg/pdt_23.f03
trunk/gcc/testsuite/gfortran.dg/pdt_24.f03
trunk/gcc/testsuite/gfortran.dg/pdt_25.f03
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/fortran/resolve.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pdt_10.f03
trunk/gcc/testsuite/gfortran.dg/pdt_4.f03
>From gcc-bugs-return-583733-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:06:34 2017
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Subject: [Bug fortran/82720] [PDT] ICE in gfc_conv_component_ref, at fortran/trans-expr.c:2400
Date: Fri, 01 Dec 2017 15:06:00 -0000
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--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Fri Dec 1 15:05:55 2017
New Revision: 255311
URL: https://gcc.gnu.org/viewcvs?rev=255311&root=gcc&view=rev
Log:
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* resolve.c (get_pdt_constructor): Initialize 'cons' to NULL.
(resolve_pdt): Correct typo in prior comment. Emit an error if
any parameters are deferred and the object is neither pointer
nor allocatable.
PR fortran/82606
* decl.c (gfc_get_pdt_instance): Continue if the parameter sym
is not present or has no name. Select the parameter by name
of component, rather than component order. Remove all the other
manipulations of 'tail' when building the pdt instance.
(gfc_match_formal_arglist): Emit and error if a star is picked
up in a PDT decl parameter list.
PR fortran/82622
* trans-array.c (set_loop_bounds): If a GFC_SS_COMPONENT has an
info->end, use it rather than falling through to
gcc_unreachable.
(structure_alloc_comps): Check that param->name is non-null
before comparing with the component name.
* trans-decl.c (gfc_get_symbol_decl): Do not use the static
initializer for PDT symbols.
(gfc_init_default_dt): Do nothing for PDT symbols.
* trans-io.c (transfer_array_component): Parameterized array
components use the descriptor ubound since the shape is not
available.
PR fortran/82719
PR fortran/82720
* trans-expr.c (gfc_conv_component_ref): Do not use the charlen
backend_decl of pdt strings. Use the hidden component instead.
* trans-io.c (transfer_expr): Do not do IO on "hidden" string
lengths. Use the hidden string length for pdt string transfers
by adding it to the se structure. When finished nullify the
se string length.
PR fortran/82866
* decl.c (gfc_match_formal_arglist): If a name is not found or
star is found, while reading a type parameter list, emit an
immediate error.
(gfc_match_derived_decl): On reading a PDT parameter list, on
failure to match call gfc_error_recovery.
PR fortran/82978
* decl.c (build_struct): Character kind defaults to 1, so use
kind_expr whatever is the set value.
(gfc_get_pdt_instance): Ditto.
* trans-array.c (structure_alloc_comps): Copy the expression
for the PDT string length before parameter substitution. Use
this expression for evaluation and free it after use.
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* gfortran.dg/pdt_4.f03 : Incorporate the new error.
PR fortran/82606
* gfortran.dg/pdt_19.f03 : New test.
* gfortran.dg/pdt_21.f03 : New test.
PR fortran/82622
* gfortran.dg/pdt_20.f03 : New test.
* gfortran.dg/pdt_22.f03 : New test.
PR fortran/82719
PR fortran/82720
* gfortran.dg/pdt_23.f03 : New test.
PR fortran/82866
* gfortran.dg/pdt_24.f03 : New test.
PR fortran/82978
* gfortran.dg/pdt_10.f03 : Correct for error in coding the for
kind 4 component and change the kind check appropriately.
* gfortran.dg/pdt_25.f03 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pdt_19.f03
trunk/gcc/testsuite/gfortran.dg/pdt_20.f03
trunk/gcc/testsuite/gfortran.dg/pdt_21.f03
trunk/gcc/testsuite/gfortran.dg/pdt_22.f03
trunk/gcc/testsuite/gfortran.dg/pdt_23.f03
trunk/gcc/testsuite/gfortran.dg/pdt_24.f03
trunk/gcc/testsuite/gfortran.dg/pdt_25.f03
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/fortran/resolve.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pdt_10.f03
trunk/gcc/testsuite/gfortran.dg/pdt_4.f03
>From gcc-bugs-return-583730-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:06:33 2017
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Subject: [Bug fortran/82719] [PDT] ICE in transfer_expr, at fortran/trans-io.c:2393
Date: Fri, 01 Dec 2017 15:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82719
--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Fri Dec 1 15:05:55 2017
New Revision: 255311
URL: https://gcc.gnu.org/viewcvs?rev=255311&root=gcc&view=rev
Log:
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* resolve.c (get_pdt_constructor): Initialize 'cons' to NULL.
(resolve_pdt): Correct typo in prior comment. Emit an error if
any parameters are deferred and the object is neither pointer
nor allocatable.
PR fortran/82606
* decl.c (gfc_get_pdt_instance): Continue if the parameter sym
is not present or has no name. Select the parameter by name
of component, rather than component order. Remove all the other
manipulations of 'tail' when building the pdt instance.
(gfc_match_formal_arglist): Emit and error if a star is picked
up in a PDT decl parameter list.
PR fortran/82622
* trans-array.c (set_loop_bounds): If a GFC_SS_COMPONENT has an
info->end, use it rather than falling through to
gcc_unreachable.
(structure_alloc_comps): Check that param->name is non-null
before comparing with the component name.
* trans-decl.c (gfc_get_symbol_decl): Do not use the static
initializer for PDT symbols.
(gfc_init_default_dt): Do nothing for PDT symbols.
* trans-io.c (transfer_array_component): Parameterized array
components use the descriptor ubound since the shape is not
available.
PR fortran/82719
PR fortran/82720
* trans-expr.c (gfc_conv_component_ref): Do not use the charlen
backend_decl of pdt strings. Use the hidden component instead.
* trans-io.c (transfer_expr): Do not do IO on "hidden" string
lengths. Use the hidden string length for pdt string transfers
by adding it to the se structure. When finished nullify the
se string length.
PR fortran/82866
* decl.c (gfc_match_formal_arglist): If a name is not found or
star is found, while reading a type parameter list, emit an
immediate error.
(gfc_match_derived_decl): On reading a PDT parameter list, on
failure to match call gfc_error_recovery.
PR fortran/82978
* decl.c (build_struct): Character kind defaults to 1, so use
kind_expr whatever is the set value.
(gfc_get_pdt_instance): Ditto.
* trans-array.c (structure_alloc_comps): Copy the expression
for the PDT string length before parameter substitution. Use
this expression for evaluation and free it after use.
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* gfortran.dg/pdt_4.f03 : Incorporate the new error.
PR fortran/82606
* gfortran.dg/pdt_19.f03 : New test.
* gfortran.dg/pdt_21.f03 : New test.
PR fortran/82622
* gfortran.dg/pdt_20.f03 : New test.
* gfortran.dg/pdt_22.f03 : New test.
PR fortran/82719
PR fortran/82720
* gfortran.dg/pdt_23.f03 : New test.
PR fortran/82866
* gfortran.dg/pdt_24.f03 : New test.
PR fortran/82978
* gfortran.dg/pdt_10.f03 : Correct for error in coding the for
kind 4 component and change the kind check appropriately.
* gfortran.dg/pdt_25.f03 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pdt_19.f03
trunk/gcc/testsuite/gfortran.dg/pdt_20.f03
trunk/gcc/testsuite/gfortran.dg/pdt_21.f03
trunk/gcc/testsuite/gfortran.dg/pdt_22.f03
trunk/gcc/testsuite/gfortran.dg/pdt_23.f03
trunk/gcc/testsuite/gfortran.dg/pdt_24.f03
trunk/gcc/testsuite/gfortran.dg/pdt_25.f03
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/fortran/resolve.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pdt_10.f03
trunk/gcc/testsuite/gfortran.dg/pdt_4.f03
>From gcc-bugs-return-583732-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:06:34 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82605] [PDT] ICE in insert_parameter_exprs, at fortran/decl.c:3154
Date: Fri, 01 Dec 2017 15:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82605
--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Fri Dec 1 15:05:55 2017
New Revision: 255311
URL: https://gcc.gnu.org/viewcvs?rev=255311&root=gcc&view=rev
Log:
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* resolve.c (get_pdt_constructor): Initialize 'cons' to NULL.
(resolve_pdt): Correct typo in prior comment. Emit an error if
any parameters are deferred and the object is neither pointer
nor allocatable.
PR fortran/82606
* decl.c (gfc_get_pdt_instance): Continue if the parameter sym
is not present or has no name. Select the parameter by name
of component, rather than component order. Remove all the other
manipulations of 'tail' when building the pdt instance.
(gfc_match_formal_arglist): Emit and error if a star is picked
up in a PDT decl parameter list.
PR fortran/82622
* trans-array.c (set_loop_bounds): If a GFC_SS_COMPONENT has an
info->end, use it rather than falling through to
gcc_unreachable.
(structure_alloc_comps): Check that param->name is non-null
before comparing with the component name.
* trans-decl.c (gfc_get_symbol_decl): Do not use the static
initializer for PDT symbols.
(gfc_init_default_dt): Do nothing for PDT symbols.
* trans-io.c (transfer_array_component): Parameterized array
components use the descriptor ubound since the shape is not
available.
PR fortran/82719
PR fortran/82720
* trans-expr.c (gfc_conv_component_ref): Do not use the charlen
backend_decl of pdt strings. Use the hidden component instead.
* trans-io.c (transfer_expr): Do not do IO on "hidden" string
lengths. Use the hidden string length for pdt string transfers
by adding it to the se structure. When finished nullify the
se string length.
PR fortran/82866
* decl.c (gfc_match_formal_arglist): If a name is not found or
star is found, while reading a type parameter list, emit an
immediate error.
(gfc_match_derived_decl): On reading a PDT parameter list, on
failure to match call gfc_error_recovery.
PR fortran/82978
* decl.c (build_struct): Character kind defaults to 1, so use
kind_expr whatever is the set value.
(gfc_get_pdt_instance): Ditto.
* trans-array.c (structure_alloc_comps): Copy the expression
for the PDT string length before parameter substitution. Use
this expression for evaluation and free it after use.
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* gfortran.dg/pdt_4.f03 : Incorporate the new error.
PR fortran/82606
* gfortran.dg/pdt_19.f03 : New test.
* gfortran.dg/pdt_21.f03 : New test.
PR fortran/82622
* gfortran.dg/pdt_20.f03 : New test.
* gfortran.dg/pdt_22.f03 : New test.
PR fortran/82719
PR fortran/82720
* gfortran.dg/pdt_23.f03 : New test.
PR fortran/82866
* gfortran.dg/pdt_24.f03 : New test.
PR fortran/82978
* gfortran.dg/pdt_10.f03 : Correct for error in coding the for
kind 4 component and change the kind check appropriately.
* gfortran.dg/pdt_25.f03 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pdt_19.f03
trunk/gcc/testsuite/gfortran.dg/pdt_20.f03
trunk/gcc/testsuite/gfortran.dg/pdt_21.f03
trunk/gcc/testsuite/gfortran.dg/pdt_22.f03
trunk/gcc/testsuite/gfortran.dg/pdt_23.f03
trunk/gcc/testsuite/gfortran.dg/pdt_24.f03
trunk/gcc/testsuite/gfortran.dg/pdt_25.f03
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/fortran/resolve.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pdt_10.f03
trunk/gcc/testsuite/gfortran.dg/pdt_4.f03
>From gcc-bugs-return-583734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:06:34 2017
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Subject: [Bug fortran/82978] [PDT] [F2003] Paramaterized Derived Type LEN parameters take the latest value per-kind
Date: Fri, 01 Dec 2017 15:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82978
--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Fri Dec 1 15:05:55 2017
New Revision: 255311
URL: https://gcc.gnu.org/viewcvs?rev=255311&root=gcc&view=rev
Log:
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* resolve.c (get_pdt_constructor): Initialize 'cons' to NULL.
(resolve_pdt): Correct typo in prior comment. Emit an error if
any parameters are deferred and the object is neither pointer
nor allocatable.
PR fortran/82606
* decl.c (gfc_get_pdt_instance): Continue if the parameter sym
is not present or has no name. Select the parameter by name
of component, rather than component order. Remove all the other
manipulations of 'tail' when building the pdt instance.
(gfc_match_formal_arglist): Emit and error if a star is picked
up in a PDT decl parameter list.
PR fortran/82622
* trans-array.c (set_loop_bounds): If a GFC_SS_COMPONENT has an
info->end, use it rather than falling through to
gcc_unreachable.
(structure_alloc_comps): Check that param->name is non-null
before comparing with the component name.
* trans-decl.c (gfc_get_symbol_decl): Do not use the static
initializer for PDT symbols.
(gfc_init_default_dt): Do nothing for PDT symbols.
* trans-io.c (transfer_array_component): Parameterized array
components use the descriptor ubound since the shape is not
available.
PR fortran/82719
PR fortran/82720
* trans-expr.c (gfc_conv_component_ref): Do not use the charlen
backend_decl of pdt strings. Use the hidden component instead.
* trans-io.c (transfer_expr): Do not do IO on "hidden" string
lengths. Use the hidden string length for pdt string transfers
by adding it to the se structure. When finished nullify the
se string length.
PR fortran/82866
* decl.c (gfc_match_formal_arglist): If a name is not found or
star is found, while reading a type parameter list, emit an
immediate error.
(gfc_match_derived_decl): On reading a PDT parameter list, on
failure to match call gfc_error_recovery.
PR fortran/82978
* decl.c (build_struct): Character kind defaults to 1, so use
kind_expr whatever is the set value.
(gfc_get_pdt_instance): Ditto.
* trans-array.c (structure_alloc_comps): Copy the expression
for the PDT string length before parameter substitution. Use
this expression for evaluation and free it after use.
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* gfortran.dg/pdt_4.f03 : Incorporate the new error.
PR fortran/82606
* gfortran.dg/pdt_19.f03 : New test.
* gfortran.dg/pdt_21.f03 : New test.
PR fortran/82622
* gfortran.dg/pdt_20.f03 : New test.
* gfortran.dg/pdt_22.f03 : New test.
PR fortran/82719
PR fortran/82720
* gfortran.dg/pdt_23.f03 : New test.
PR fortran/82866
* gfortran.dg/pdt_24.f03 : New test.
PR fortran/82978
* gfortran.dg/pdt_10.f03 : Correct for error in coding the for
kind 4 component and change the kind check appropriately.
* gfortran.dg/pdt_25.f03 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pdt_19.f03
trunk/gcc/testsuite/gfortran.dg/pdt_20.f03
trunk/gcc/testsuite/gfortran.dg/pdt_21.f03
trunk/gcc/testsuite/gfortran.dg/pdt_22.f03
trunk/gcc/testsuite/gfortran.dg/pdt_23.f03
trunk/gcc/testsuite/gfortran.dg/pdt_24.f03
trunk/gcc/testsuite/gfortran.dg/pdt_25.f03
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/fortran/resolve.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pdt_10.f03
trunk/gcc/testsuite/gfortran.dg/pdt_4.f03
>From gcc-bugs-return-583729-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:06:33 2017
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Subject: [Bug fortran/82622] [PDT] ICE in structure_alloc_comps, at fortran/trans-array.c:8963
Date: Fri, 01 Dec 2017 15:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82622
--- Comment #8 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Fri Dec 1 15:05:55 2017
New Revision: 255311
URL: https://gcc.gnu.org/viewcvs?rev=255311&root=gcc&view=rev
Log:
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* resolve.c (get_pdt_constructor): Initialize 'cons' to NULL.
(resolve_pdt): Correct typo in prior comment. Emit an error if
any parameters are deferred and the object is neither pointer
nor allocatable.
PR fortran/82606
* decl.c (gfc_get_pdt_instance): Continue if the parameter sym
is not present or has no name. Select the parameter by name
of component, rather than component order. Remove all the other
manipulations of 'tail' when building the pdt instance.
(gfc_match_formal_arglist): Emit and error if a star is picked
up in a PDT decl parameter list.
PR fortran/82622
* trans-array.c (set_loop_bounds): If a GFC_SS_COMPONENT has an
info->end, use it rather than falling through to
gcc_unreachable.
(structure_alloc_comps): Check that param->name is non-null
before comparing with the component name.
* trans-decl.c (gfc_get_symbol_decl): Do not use the static
initializer for PDT symbols.
(gfc_init_default_dt): Do nothing for PDT symbols.
* trans-io.c (transfer_array_component): Parameterized array
components use the descriptor ubound since the shape is not
available.
PR fortran/82719
PR fortran/82720
* trans-expr.c (gfc_conv_component_ref): Do not use the charlen
backend_decl of pdt strings. Use the hidden component instead.
* trans-io.c (transfer_expr): Do not do IO on "hidden" string
lengths. Use the hidden string length for pdt string transfers
by adding it to the se structure. When finished nullify the
se string length.
PR fortran/82866
* decl.c (gfc_match_formal_arglist): If a name is not found or
star is found, while reading a type parameter list, emit an
immediate error.
(gfc_match_derived_decl): On reading a PDT parameter list, on
failure to match call gfc_error_recovery.
PR fortran/82978
* decl.c (build_struct): Character kind defaults to 1, so use
kind_expr whatever is the set value.
(gfc_get_pdt_instance): Ditto.
* trans-array.c (structure_alloc_comps): Copy the expression
for the PDT string length before parameter substitution. Use
this expression for evaluation and free it after use.
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* gfortran.dg/pdt_4.f03 : Incorporate the new error.
PR fortran/82606
* gfortran.dg/pdt_19.f03 : New test.
* gfortran.dg/pdt_21.f03 : New test.
PR fortran/82622
* gfortran.dg/pdt_20.f03 : New test.
* gfortran.dg/pdt_22.f03 : New test.
PR fortran/82719
PR fortran/82720
* gfortran.dg/pdt_23.f03 : New test.
PR fortran/82866
* gfortran.dg/pdt_24.f03 : New test.
PR fortran/82978
* gfortran.dg/pdt_10.f03 : Correct for error in coding the for
kind 4 component and change the kind check appropriately.
* gfortran.dg/pdt_25.f03 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pdt_19.f03
trunk/gcc/testsuite/gfortran.dg/pdt_20.f03
trunk/gcc/testsuite/gfortran.dg/pdt_21.f03
trunk/gcc/testsuite/gfortran.dg/pdt_22.f03
trunk/gcc/testsuite/gfortran.dg/pdt_23.f03
trunk/gcc/testsuite/gfortran.dg/pdt_24.f03
trunk/gcc/testsuite/gfortran.dg/pdt_25.f03
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/fortran/resolve.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pdt_10.f03
trunk/gcc/testsuite/gfortran.dg/pdt_4.f03
>From gcc-bugs-return-583731-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:06:34 2017
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Subject: [Bug fortran/82866] [PDT] ICE in resolve_fl_derived0, at fortran/resolve.c:14004
Date: Fri, 01 Dec 2017 15:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82866
--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Fri Dec 1 15:05:55 2017
New Revision: 255311
URL: https://gcc.gnu.org/viewcvs?rev=255311&root=gcc&view=rev
Log:
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* resolve.c (get_pdt_constructor): Initialize 'cons' to NULL.
(resolve_pdt): Correct typo in prior comment. Emit an error if
any parameters are deferred and the object is neither pointer
nor allocatable.
PR fortran/82606
* decl.c (gfc_get_pdt_instance): Continue if the parameter sym
is not present or has no name. Select the parameter by name
of component, rather than component order. Remove all the other
manipulations of 'tail' when building the pdt instance.
(gfc_match_formal_arglist): Emit and error if a star is picked
up in a PDT decl parameter list.
PR fortran/82622
* trans-array.c (set_loop_bounds): If a GFC_SS_COMPONENT has an
info->end, use it rather than falling through to
gcc_unreachable.
(structure_alloc_comps): Check that param->name is non-null
before comparing with the component name.
* trans-decl.c (gfc_get_symbol_decl): Do not use the static
initializer for PDT symbols.
(gfc_init_default_dt): Do nothing for PDT symbols.
* trans-io.c (transfer_array_component): Parameterized array
components use the descriptor ubound since the shape is not
available.
PR fortran/82719
PR fortran/82720
* trans-expr.c (gfc_conv_component_ref): Do not use the charlen
backend_decl of pdt strings. Use the hidden component instead.
* trans-io.c (transfer_expr): Do not do IO on "hidden" string
lengths. Use the hidden string length for pdt string transfers
by adding it to the se structure. When finished nullify the
se string length.
PR fortran/82866
* decl.c (gfc_match_formal_arglist): If a name is not found or
star is found, while reading a type parameter list, emit an
immediate error.
(gfc_match_derived_decl): On reading a PDT parameter list, on
failure to match call gfc_error_recovery.
PR fortran/82978
* decl.c (build_struct): Character kind defaults to 1, so use
kind_expr whatever is the set value.
(gfc_get_pdt_instance): Ditto.
* trans-array.c (structure_alloc_comps): Copy the expression
for the PDT string length before parameter substitution. Use
this expression for evaluation and free it after use.
2017-12-01 Paul Thomas <pault@gcc.gnu.org>
PR fortran/82605
* gfortran.dg/pdt_4.f03 : Incorporate the new error.
PR fortran/82606
* gfortran.dg/pdt_19.f03 : New test.
* gfortran.dg/pdt_21.f03 : New test.
PR fortran/82622
* gfortran.dg/pdt_20.f03 : New test.
* gfortran.dg/pdt_22.f03 : New test.
PR fortran/82719
PR fortran/82720
* gfortran.dg/pdt_23.f03 : New test.
PR fortran/82866
* gfortran.dg/pdt_24.f03 : New test.
PR fortran/82978
* gfortran.dg/pdt_10.f03 : Correct for error in coding the for
kind 4 component and change the kind check appropriately.
* gfortran.dg/pdt_25.f03 : New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pdt_19.f03
trunk/gcc/testsuite/gfortran.dg/pdt_20.f03
trunk/gcc/testsuite/gfortran.dg/pdt_21.f03
trunk/gcc/testsuite/gfortran.dg/pdt_22.f03
trunk/gcc/testsuite/gfortran.dg/pdt_23.f03
trunk/gcc/testsuite/gfortran.dg/pdt_24.f03
trunk/gcc/testsuite/gfortran.dg/pdt_25.f03
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/fortran/resolve.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pdt_10.f03
trunk/gcc/testsuite/gfortran.dg/pdt_4.f03
>From gcc-bugs-return-583735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:07:25 2017
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Subject: [Bug fortran/82605] [PDT] ICE in insert_parameter_exprs, at fortran/decl.c:3154
Date: Fri, 01 Dec 2017 15:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82605
Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed. Thanks for the report.
Paul
>From gcc-bugs-return-583738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:07:58 2017
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82173] [meta-bug] Parameterized derived type errors
Date: Fri, 01 Dec 2017 15:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82173
Bug 82173 depends on bug 82606, which changed state.
Bug 82606 Summary: [PDT] ICE in gfc_extract_int, at fortran/expr.c:641
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82606
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>From gcc-bugs-return-583737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:07:58 2017
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Subject: [Bug fortran/82606] [PDT] ICE in gfc_extract_int, at fortran/expr.c:641
Date: Fri, 01 Dec 2017 15:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82606
Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #10 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed. Thanks for the report.
Paul
>From gcc-bugs-return-583736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:07:26 2017
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Subject: [Bug fortran/82173] [meta-bug] Parameterized derived type errors
Date: Fri, 01 Dec 2017 15:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82173
Bug 82173 depends on bug 82605, which changed state.
Bug 82605 Summary: [PDT] ICE in insert_parameter_exprs, at fortran/decl.c:3154
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82605
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>From gcc-bugs-return-583740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:08:38 2017
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Subject: [Bug fortran/82622] [PDT] ICE in structure_alloc_comps, at fortran/trans-array.c:8963
Date: Fri, 01 Dec 2017 15:08:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #9 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed. Thanks for the report.
Paul
>From gcc-bugs-return-583739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:08:38 2017
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Subject: [Bug fortran/82173] [meta-bug] Parameterized derived type errors
Date: Fri, 01 Dec 2017 15:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82173
Bug 82173 depends on bug 82622, which changed state.
Bug 82622 Summary: [PDT] ICE in structure_alloc_comps, at fortran/trans-array.c:8963
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82622
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----------------------------------------------------------------------------
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>From gcc-bugs-return-583743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:09:47 2017
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Subject: [Bug fortran/82720] [PDT] ICE in gfc_conv_component_ref, at fortran/trans-expr.c:2400
Date: Fri, 01 Dec 2017 15:09:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed. Thanks for the report.
Paul
>From gcc-bugs-return-583742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:09:25 2017
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Subject: [Bug fortran/82173] [meta-bug] Parameterized derived type errors
Date: Fri, 01 Dec 2017 15:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82173
Bug 82173 depends on bug 82719, which changed state.
Bug 82719 Summary: [PDT] ICE in transfer_expr, at fortran/trans-io.c:2393
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82719
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>From gcc-bugs-return-583744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:09:52 2017
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Subject: [Bug fortran/82173] [meta-bug] Parameterized derived type errors
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82173
Bug 82173 depends on bug 82720, which changed state.
Bug 82720 Summary: [PDT] ICE in gfc_conv_component_ref, at fortran/trans-expr.c:2400
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82720
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----------------------------------------------------------------------------
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>From gcc-bugs-return-583745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:09:52 2017
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Subject: [Bug c++/83244] New: inline assembly does not verify input operands allocation
Date: Fri, 01 Dec 2017 15:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83244
Bug ID: 83244
Summary: inline assembly does not verify input operands
allocation
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: unjello at gmail dot com
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Created attachment 42767
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42767&action=edit
zip file with all the files to reproduce
on x86 `int` instruction needs to receive `imm8`. g++ allows to pass an input
operand in inline assembly as "register" too. Example:
template<unsigned char int_no> void int_test_pass() {
asm("int %0"
:
: "N"(int_no)
:);
}
called with:
int_test_pass<10>();
results in assembly (cutting out garbage):
_Z13int_test_passILh10EEvv:
int $10
but:
template<unsigned char int_no> void int_test_fail() {
asm("int %0"
:
: "r"(int_no)
:);
}
quietly results in assembly like this. no errors:
_Z13int_test_failILh10EEvv:
movl $10, %eax
int %al
which is illigal. I've tested this on:
g++-7 (Ubuntu 7.2.0-1ubuntu1~16.04) 7.2.0
g++-6 (Ubuntu/Linaro 6.3.0-18ubuntu2~16.04) 6.3.0 20170519
g++-5 (Ubuntu 5.4.1-2ubuntu1~16.04) 5.4.1 20160904
g++-4.9 (Ubuntu 4.9.4-2ubuntu1~16.04) 4.9.4
g++-4.8 (Ubuntu 4.8.5-4ubuntu2) 4.8.5
g++-4.7 (Ubuntu/Linaro 4.7.4-3ubuntu12) 4.7.4
g++-4.6 (Ubuntu/Linaro 4.6.4-6ubuntu6) 4.6.4
on all above, this program compiles with no errors on -Wall -Werror.
Clang on the other hands breaks compilation with an error:
gcc_imm8_bug.cpp:9:7: error: invalid operand for instruction
asm("int %0"
^
<inline asm>:1:6: note: instantiated into assembly here
int %al
^~~
1 error generated.
>From gcc-bugs-return-583741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:09:24 2017
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Subject: [Bug fortran/82719] [PDT] ICE in transfer_expr, at fortran/trans-io.c:2393
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----------------------------------------------------------------------------
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--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed. Thanks for the report.
Paul
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Subject: [Bug fortran/82978] [PDT] [F2003] Paramaterized Derived Type LEN parameters take the latest value per-kind
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed. Thanks for the report.
Paul
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Subject: [Bug fortran/82173] [meta-bug] Parameterized derived type errors
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Bug 82173 depends on bug 82978, which changed state.
Bug 82978 Summary: [PDT] [F2003] Paramaterized Derived Type LEN parameters take the latest value per-kind
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82978
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----------------------------------------------------------------------------
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>From gcc-bugs-return-583747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:10:18 2017
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Bug 82173 depends on bug 82866, which changed state.
Bug 82866 Summary: [PDT] ICE in resolve_fl_derived0, at fortran/resolve.c:14004
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82866
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>From gcc-bugs-return-583746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:10:14 2017
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #8 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed. Thanks for the report.
Paul
>From gcc-bugs-return-583750-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:11:01 2017
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Subject: [Bug tree-optimization/83241] [8 regression] ICE in verify_use after store-merging
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42768
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gcc8-pr83241.patch
Untested fix.
>From gcc-bugs-return-583751-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:17:48 2017
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Subject: [Bug c++/83244] inline assembly does not verify input operands allocation
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Andreas Schwab <schwab@linux-m68k.org> changed:
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
It is the responsibility of the user to specify correct constraints.
>From gcc-bugs-return-583752-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:30:00 2017
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Subject: [Bug target/83240] x86_64 vectorized sqrt of denormal yields -inf when DAZ=0
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--- Comment #2 from Andreas Gustafsson <gson at gson dot org> ---
Re "simply don't use -ffast-math if you are dealing with stuff like denormals",
the documentation for -ffinite-math-only (which is implied by -ffast-math) says
"Allow optimizations for floating-point arithmetic that assume that arguments
and results are not NaNs or +-Infs". It does not mention denormals, which to
me suggests that optimizations that assume arguments are not denormals are
*not* allowed.
Also, since we are discussing the case where DAZ is 0, it is likely that FTZ
(Flush To Zero) is also 0. This means that even if all the inputs to the
computation compiled with -ffast-math are guaranteed not to be denormals,
denormals can arise within the computation itself, for example any time two
inputs are added, subtracted, multiplied, or divided. In other words, if you
can't use -ffast-math "when dealing with denormals", you can't use it for any
code that does arithmetic on its inputs, which is pretty much the same thing as
saying you can't use it ever.
>From gcc-bugs-return-583753-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:31:05 2017
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Subject: [Bug tree-optimization/83170] [8 Regression] ICE: Segmentation fault - during GIMPLE pass: store-merging
Date: Fri, 01 Dec 2017 15:31:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Priority|P3 |P1
CC| |trippels at gcc dot gnu.org
Component|c++ |tree-optimization
Target Milestone|--- |8.0
Summary|ice in verify_use with -O3 |[8 Regression] ICE:
| |Segmentation fault - during
| |GIMPLE pass: store-merging
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Also happens when building Wireshark.
Jakub?
>From gcc-bugs-return-583754-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:34:34 2017
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Subject: [Bug tree-optimization/83128] Unable to optimize {m,c}alloc when strings builtin are used
Date: Fri, 01 Dec 2017 15:34:00 -0000
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--- Comment #4 from denis.campredon at gmail dot com ---
Hi Richard,
Thanks for your quick response.
I don't know if I should open a new bug or not, but your patch does not seems
to handle casts. It fails to optimize the following snippet.
------------
int fn() {
char * s = malloc(sizeof(*s));
return ((char*)__builtin_memcpy(s, "a", 1))[0];
}
------------
Regards,
Denis
>From gcc-bugs-return-583755-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:34:56 2017
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Subject: [Bug tree-optimization/83170] [8 Regression] ICE: Segmentation fault - during GIMPLE pass: store-merging
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--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Looks like a dup of PR83241. The untested patch posted there fixes the issue.
>From gcc-bugs-return-583756-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 15:39:19 2017
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Subject: [Bug c++/83244] inline assembly does not verify input operands allocation
Date: Fri, 01 Dec 2017 15:39:00 -0000
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--- Comment #2 from Andrzej Lichnerowicz <unjello at gmail dot com> ---
The resolution doesn't seem appropriate. GCC is creating invalid assembly, and
user should not be held responsible for writing correct code, because why have
any warnings and errors at all.
OTOH, it is my mistake, sort of, because GCC when emitting code, not assembly
(without -S option), actually warns about it:
$ g++-7 gcc_imm8_bug.cpp -o gcc_imm8_bug.
gcc_imm8_bug.cpp: Assembler messages:
gcc_imm8_bug.cpp:12: Error: operand type mismatch for `int'
only with -S option, it is silent.
again, Clang warns in both cases.
>From gcc-bugs-return-583757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 16:15:43 2017
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Subject: [Bug tree-optimization/83177] [7/8 Regression] ICE with -mmpx -fcheck-pointer-bounds + __builtin___bnd_narrow_ptr_bounds + _setjmp
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |ienkovich at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems chkp_get_bounds_by_definition is called multiple times for the same stmt
and we end up with:
a_24(ab) = a_2(ab) + 18446744073709551612;
__bound_tmp.1_39 = __bound_tmp.0_35(ab);
__bound_tmp.0_40(ab) = __bound_tmp.1_39;
__bound_tmp.1_37 = __bound_tmp.0_35(ab);
__bound_tmp.0_38 = __bound_tmp.1_37;
where the first pair of __bound_tmp assignments comes from the second
invocation and the second pair from the first one. That is of course invalid,
as it has overlapping ranges for (ab) __bound_tmp.0.
Not sure what would be the best fix, maybe if we need bounds across some
abnormal edge create a new SSA_NAME for that and assign it near the bottom of
the bb that computes that bound.
Anyway, not working on this.
>From gcc-bugs-return-583758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 16:17:14 2017
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Subject: [Bug fortran/83230] [8 regression] segmentation fault in bind C C/C++
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Can't reproduce.
>From gcc-bugs-return-583759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 16:22:13 2017
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83230] [8 regression] segmentation fault in bind C C/C++
Date: Fri, 01 Dec 2017 16:22:00 -0000
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--- Comment #2 from Jürgen Reuter <juergen.reuter at desy dot de> ---
I see this problem both on MAC OS X 10.13.1 with r254916 (and the patch
mentioned) as well as on Ubuntu 14.04.5 LTS with r255190. r253161 still worked
fine. We see this kind of behaviour in two different bind(C) interfaces to
external C++ libraries.
>From gcc-bugs-return-583760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 16:24:41 2017
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Subject: [Bug fortran/83230] [8 regression] segmentation fault in bind C C/C++
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--- Comment #3 from Jürgen Reuter <juergen.reuter at desy dot de> ---
This is the full back trace that I get:
Program received signal SIGSEGV, Segmentation fault.
__GI___libc_free (mem=0x6530302e30202c30) at malloc.c:2931
2931 malloc.c: No such file or directory.
(gdb) bt
#0 __GI___libc_free (mem=0x6530302e30202c30) at malloc.c:2931
#1 0x00007ffff7963c06 in deallocate (this=0x7fffffffda00, __p=<optimized out>)
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/ext/new_allocator.h:125
#2 deallocate (__a=..., __n=<optimized out>, __p=<optimized out>)
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/alloc_traits.h:462
#3 _M_destroy (__size=<optimized out>, this=0x7fffffffda00)
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:226
#4 _M_dispose (this=0x7fffffffda00)
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:221
#5 ~basic_string (this=0x7fffffffda00, __in_chrg=<optimized out>)
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:647
#6 ~basic_stringbuf (this=0x7fffffffd9b8, __in_chrg=<optimized out>)
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/sstream:65
#7 std::__cxx11::basic_stringstream<char, std::char_traits<char>,
std::allocator<char> >::~basic_stringstream (
this=0x7fffffffd9a0, __in_chrg=<optimized out>, __vtt_parm=<optimized out>)
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/sstream:732
#8 0x0000000000407b57 in WOUTIL::WOStdHepRdr::readEvent(std::ostream&, int) ()
#9 0x0000000000406c1e in print_stdhep_to_file ()
#10 0x0000000000408486 in __xdr_wo_stdhep_MOD_write_stdhep_event ()
#11 0x000000000040851a in eio_stdhep_1 ()
#12 0x00000000004085f9 in MAIN__ ()
>From gcc-bugs-return-583761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 16:25:59 2017
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From: "arnd at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83241] [8 regression] ICE in verify_use after store-merging
Date: Fri, 01 Dec 2017 16:25:00 -0000
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--- Comment #3 from Arnd Bergmann <arnd at linaro dot org> ---
That patch fixes the ICE for me on the original source file and the reduced
test case, thanks!
>From gcc-bugs-return-583762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 16:27:25 2017
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Subject: [Bug fortran/83230] [8 regression] segmentation fault in bind C C/C++
Date: Fri, 01 Dec 2017 16:27:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The Makefile doesn't have any -O* options, is this all without optimizations?
I admit I've been only compiling the fortran source with trunk f951, the rest
with the system gcc (6.3.1), but for f951 I've tried several revisions
including
/opt/notnfs/gcc-bisect/obj/gcc/f951.255190 -quiet main_ut.f90; gfortran
WOXDR.o WOStdHep.o WOStdHepRdr.o -ldl -lstdc++ -o rt_error main_ut.f90;
./rt_error
writing stdhep event ...
... done.
Starting to read that file:
>From gcc-bugs-return-583763-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 16:30:42 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83230] [8 regression] segmentation fault in bind C C/C++
Date: Fri, 01 Dec 2017 16:30:00 -0000
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--- Comment #5 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Jakub Jelinek from comment #4)
> The Makefile doesn't have any -O* options, is this all without optimizations?
> I admit I've been only compiling the fortran source with trunk f951, the
> rest with the system gcc (6.3.1), but for f951 I've tried several revisions
> including
> /opt/notnfs/gcc-bisect/obj/gcc/f951.255190 -quiet main_ut.f90; gfortran
> WOXDR.o WOStdHep.o WOStdHepRdr.o -ldl -lstdc++ -o rt_error main_ut.f90;
> ./rt_error
> writing stdhep event ...
> ... done.
> Starting to read that file:
Yes, indeed we do not include any optimisations flags. For our software project
we use libtool which puts in -O2 -g IIRC. I believe that you have to link to
the libstdc++ which comes with the corresponding gcc svn revision in order to
reproduce the issue.
>From gcc-bugs-return-583764-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 17:01:57 2017
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Subject: [Bug target/83245] New: [8 regression] several tests fail starting with r255258
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Bug ID: 83245
Summary: [8 regression] several tests fail starting with
r255258
Product: gcc
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Starting with r255258 there are 5 test cases that fail on powerpc64 BE (LE is
fine).
> FAIL: gcc.dg/torture/stackalign/builtin-apply-2.c -Os -fpic (test for excess errors)
> FAIL: gcc.dg/torture/stackalign/builtin-return-1.c -Os -fpic (test for excess errors)
> FAIL: gfortran.dg/alloc_comp_assign_2.f90 -Os (test for excess errors)
> FAIL: gfortran.dg/defined_assignment_2.f90 -Os execution test
> FAIL: libgomp.fortran/allocatable9.f90 -Os (test for excess errors)
They all seem to be failing for the same reason:
spawn -ignore SIGHUP
/home/seurer/gcc/build/gcc-bisect/gcc/testsuite/gfortran/../../gfortran
-B/home/seurer/gcc/build/gcc-bisect/gcc/testsuite/gfortran/../../
-B/home/seurer/gcc/build/gcc-bisect/powerpc64-unknown-linux-gnu/./libgfortran/
/home/seurer/gcc/gcc-bisect/gcc/testsuite/gfortran.dg/alloc_comp_assign_2.f90
-fno-diagnostics-show-caret -fdiagnostics-color=never -Os -pedantic-errors
-B/home/seurer/gcc/build/gcc-bisect/powerpc64-unknown-linux-gnu/./libgfortran/.libs
-L/home/seurer/gcc/build/gcc-bisect/powerpc64-unknown-linux-gnu/./libgfortran/.libs
-L/home/seurer/gcc/build/gcc-bisect/powerpc64-unknown-linux-gnu/./libgfortran/.libs
-L/home/seurer/gcc/build/gcc-bisect/powerpc64-unknown-linux-gnu/./libatomic/.libs
-B/home/seurer/gcc/build/gcc-bisect/powerpc64-unknown-linux-gnu/./libquadmath/.libs
-L/home/seurer/gcc/build/gcc-bisect/powerpc64-unknown-linux-gnu/./libquadmath/.libs
-L/home/seurer/gcc/build/gcc-bisect/powerpc64-unknown-linux-gnu/./libquadmath/.libs
-lm -o ./alloc_comp_assign_2.exe
/tmp/ccAojICz.s: Assembler messages:
/tmp/ccAojICz.s:703: Error: address register in load range
compiler exited with status 1
output is:
/tmp/ccAojICz.s: Assembler messages:
/tmp/ccAojICz.s:703: Error: address register in load range
FAIL: gfortran.dg/alloc_comp_assign_2.f90 -Os (test for excess errors)
Excess errors:
/tmp/ccAojICz.s:703:0: Error: address register in load range
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-bisect/gcc/xgcc
-B/home/seurer/gcc/build/gcc-bisect/gcc/
/home/seurer/gcc/gcc-bisect/gcc/testsuite/gcc.dg/torture/stackalign/builtin-apply-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -Os -fpic -lm -o
./builtin-apply-2.exe
/tmp/ccmQaGmG.s: Assembler messages:
/tmp/ccmQaGmG.s:116: Error: address register in load range
compiler exited with status 1
output is:
/tmp/ccmQaGmG.s: Assembler messages:
/tmp/ccmQaGmG.s:116: Error: address register in load range
FAIL: gcc.dg/torture/stackalign/builtin-apply-2.c -Os -fpic (test for excess
errors)
Excess errors:
/tmp/ccmQaGmG.s:116: Error: address register in load range
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-bisect/gcc/xgcc
-B/home/seurer/gcc/build/gcc-bisect/gcc/
/home/seurer/gcc/gcc-bisect/gcc/testsuite/gcc.dg/torture/stackalign/builtin-return-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -Os -fpic -lm -o
./builtin-return-1.exe
/tmp/ccbLTFT6.s: Assembler messages:
/tmp/ccbLTFT6.s:112: Error: address register in load range
compiler exited with status 1
output is:
/tmp/ccbLTFT6.s: Assembler messages:
/tmp/ccbLTFT6.s:112: Error: address register in load range
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c -Os -fpic (test for excess
errors)
Excess errors:
/tmp/ccbLTFT6.s:112: Error: address register in load range
Looking in detail at builtin-apply-2.s line 116 is:
lswi 5,9,0
The previous revision used r4 here instead of r9. r9 is in the range of
registers that lswi is loading so the instruction is invalid.
Load String Word Immediate
lswi RT,RA,NB
Let the effective address (EA) be (RA|0). Let n = NB if
NB≠0, n = 32 if NB=0; n is the number of bytes to load.
Let nr=CEIL(n/4); nr is the number of registers to
receive data.
n consecutive bytes starting at EA are loaded into
GPRs RT through RT+nr-1.
If RA is in the range of registers to be loaded, including
the case in which RA=0, the instruction form is invalid.
seurer@makalu-lp1:~/gcc/build/gcc-test$ diff builtin-apply-2.s.255257
builtin-apply-2.s.255258
33c33
< stdu 1,-832(1)
---
> stdu 1,-816(1)
51d50
< std 3,56(31)
52a52
> std 3,56(31)
66c66,67
< addi 3,31,880
---
> addi 3,31,864
> addi 4,31,48
103,104d103
< addi 9,31,48
< std 9,672(31)
106d104
< std 9,592(31)
107a106
> std 9,592(31)
111,112c110,111
< mr 4,0
< addi 0,31,912
---
> mr 9,0
> addi 0,31,896
114,115c113,114
< stswi 5,4,0
< mr 4,0
---
> stswi 5,9,0
> mr 9,0
117c116
< lswi 5,4,0
---
> lswi 5,9,0
119c118,125
< ld 10,672(31)
---
> mr 10,4
> ld 11,608(31)
> ld 3,8(4)
> ld 5,24(10)
> ld 6,32(10)
> ld 7,40(10)
> ld 8,48(10)
> ld 9,56(10)
122a129,130
> ld 4,16(4)
> ld 10,64(10)
126,132d133
< ld 3,8(10)
< ld 4,16(10)
< ld 5,24(10)
< ld 6,32(10)
< ld 7,40(10)
< ld 8,48(10)
< ld 9,56(10)
134d134
< ld 10,64(10)
145d144
< ld 11,608(31)
174c173
< addi 1,31,832
---
> addi 1,31,816
228c227
< .ident "GCC: (GNU) 8.0.0 20171129 (experimental) [trunk revision
255257]"
---
> .ident "GCC: (GNU) 8.0.0 20171129 (experimental) [trunk revision 255258]"
>From gcc-bugs-return-583765-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 17:04:07 2017
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Subject: [Bug fortran/82173] [meta-bug] Parameterized derived type errors
Date: Fri, 01 Dec 2017 17:04:00 -0000
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Bug 82173 depends on bug 82979, which changed state.
Bug 82979 Summary: [PDT] [F2003] [ice-on-invalid] ICE (segfault) on invalid type-param-name-list in PDT declaration
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82979
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-583766-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 17:04:11 2017
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Subject: [Bug fortran/82979] [PDT] [F2003] [ice-on-invalid] ICE (segfault) on invalid type-param-name-list in PDT declaration
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
This now gives:
pr82205.f90:1:15:
type :: pdt_t(k=4)
1
Error: Expected parameter list in type declaration at (1)
Closing as fixed.
Paul
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Subject: [Bug target/83245] [8 regression] several tests fail starting with r255258
Date: Fri, 01 Dec 2017 17:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83245
David Edelsohn <dje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-01
CC| |dje at gcc dot gnu.org
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--- Comment #1 from David Edelsohn <dje at gcc dot gnu.org> ---
confirmed.
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Subject: [Bug libstdc++/82685] basic_string_view<char> operator""sv(const char*, size_t) should be noexcept
Date: Fri, 01 Dec 2017 17:12:00 -0000
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Dec 1 17:12:07 2017
New Revision: 255325
URL: https://gcc.gnu.org/viewcvs?rev=255325&root=gcc&view=rev
Log:
PR libstdc++/82685 add 'noexcept' to string_view literals
Backport from mainline
2017-10-24 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/82685
* include/experimental/string_view (operator""sv): Add noexcept.
* include/std/string_view (operator""sv): Likewise.
Modified:
branches/gcc-7-branch/libstdc++-v3/ChangeLog
branches/gcc-7-branch/libstdc++-v3/include/experimental/string_view
branches/gcc-7-branch/libstdc++-v3/include/std/string_view
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Subject: [Bug c++/83226] [7 Regression] std::map with reference T breaks in C++17 mode
Date: Fri, 01 Dec 2017 17:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83226
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Dec 1 17:12:04 2017
New Revision: 255324
URL: https://gcc.gnu.org/viewcvs?rev=255324&root=gcc&view=rev
Log:
PR libstdc++/83226 avoid forming pointer-to-reference type
Backport from mainline
2017-11-30 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/83226
* include/bits/node_handle.h (_Node_handle::__pointer): Avoid forming
pointer-to-reference types.
* testsuite/23_containers/map/modifiers/insert/83226.cc: New test.
Added:
branches/gcc-7-branch/libstdc++-v3/testsuite/23_containers/map/modifiers/insert/83226.cc
Modified:
branches/gcc-7-branch/libstdc++-v3/ChangeLog
branches/gcc-7-branch/libstdc++-v3/include/bits/node_handle.h
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Subject: [Bug libstdc++/83134] std::negation uses !B::value instead of !bool(B::value)
Date: Fri, 01 Dec 2017 17:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83134
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Dec 1 17:12:23 2017
New Revision: 255329
URL: https://gcc.gnu.org/viewcvs?rev=255329&root=gcc&view=rev
Log:
PR libstdc++/83134 Ensure std::__not_ converts B::value to bool
Backport from mainline
2017-11-23 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/83134
* include/std/type_traits (__not_): Explicitly convert to bool.
* testsuite/20_util/declval/requirements/1_neg.cc: Adjust dg-error.
* testsuite/20_util/logical_traits/83134.cc: New test.
* testsuite/20_util/make_signed/requirements/typedefs_neg.cc: Adjust
dg-error.
* testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc:
Likewise.
Added:
branches/gcc-7-branch/libstdc++-v3/testsuite/20_util/logical_traits/83134.cc
- copied, changed from r255328,
branches/gcc-7-branch/libstdc++-v3/testsuite/20_util/declval/requirements/1_neg.cc
Modified:
branches/gcc-7-branch/libstdc++-v3/ChangeLog
branches/gcc-7-branch/libstdc++-v3/include/std/type_traits
branches/gcc-7-branch/libstdc++-v3/testsuite/20_util/declval/requirements/1_neg.cc
branches/gcc-7-branch/libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs_neg.cc
branches/gcc-7-branch/libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc
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Subject: [Bug c++/83226] [7 Regression] std::map with reference T breaks in C++17 mode
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 7.3
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Subject: [Bug libstdc++/83134] std::negation uses !B::value instead of !bool(B::value)
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 7.3
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Subject: [Bug libstdc++/82685] basic_string_view<char> operator""sv(const char*, size_t) should be noexcept
Date: Fri, 01 Dec 2017 17:17:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 7.3
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Subject: [Bug fortran/83246] New: internal compiler error or loader problem might be related to a PARAMETER statement being in a BLOCK
Date: Fri, 01 Dec 2017 17:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83246
Bug ID: 83246
Summary: internal compiler error or loader problem might be
related to a PARAMETER statement being in a BLOCK
Product: gcc
Version: 6.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: urbanjost at comcast dot net
Target Milestone: ---
Created attachment 42769
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42769&action=edit
create scratch file in BLOCK
Using GNU Fortran 6.4.0 on Cygwin I get various errors and/or this
program runs making small changes to the test code. I only seem to
have problems if I declare a PARAMETER in a BLOCK, but I thought
that was allowed? (Really have not used BLOCK much yet).
If I have block MAKEDATA first I get loader error
>/tmp/CCALL_CYGWIN64_GFORTRAN_8008/ccQ0aELt.o: In function `dusty_corner':
>/tmp/CCALL_CYGWIN64_GFORTRAN_8008/yyy.8008.f90:28: undefined reference to
`scratch.3494'
>/tmp/CCALL_CYGWIN64_GFORTRAN_8008/yyy.8008.f90:28:(.text+0x79a): relocation
truncated to fit: R_X86_64_PC32 against undefined symbol `scratch.3494'
If I switch the order of MAKEDATA and MAKEDATAP blocks I get
> MAKEDATA: block
>
>internal compiler error: in gfc_process_block_locals, at
fortran/trans-decl.c:6474
>
>/tmp/CCALL_CYGWIN64_GFORTRAN_131892/yyy.131892.f90:27:0: internal compiler
error: Segmentation fault
>mmap: No such device
>Please submit a full bug report,
>with preprocessed source if appropriate.
If I comment out the first write statement ("BLOCK TESTS") the program works
or
If I comment out block MAKEDATAP the program works
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Subject: [Bug c/82186] [7/8 Regression] ICE (segfault), VLA type with inlining
Date: Fri, 01 Dec 2017 17:45:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Note C++ ICEs as well on the same testcase.
The problem (I guess for both FEs) is from where to emit the DECL_EXPRs, e.g.
in the C FE groktypename is called from many spots and I believe the middle-end
wants to see DECL_EXPRs not just for the toplevel variably_modified_type_p
(e.g. from c_cast_expr), but also any VLA types it refers to, if they don't
have DECL_EXPRs emitted yet.
I don't think either FE tracks that right now.
Or shall we try to emit those later (e.g. from C genericization), if we see a
variably modified type that doesn't have a TYPE_DECL yet add somewhere (before
the stmt containing it? What about conditional contexts etc.?) a DECL_EXPR for
the TYPE_DECL we create for it.
E.g. for:
int
foo (int n, void *x, void *y)
{
struct S { int (***p)[n][n][n]; } s;
int (***q)[n][n][n];
s.p = x;
q = y;
return (***s.p)[1][2][3] + (***q)[1][2][3];
}
we emit all the needed DECL_EXPRs, apparently from:
/* When the pointed-to type involves components of variable size,
care must be taken to ensure that the size evaluation code is
emitted early enough to dominate all the possible later uses
and late enough for the variables on which it depends to have
been assigned.
This is expected to happen automatically when the pointed-to
type has a name/declaration of it's own, but special attention
is required if the type is anonymous.
We handle the NORMAL and FIELD contexts here by attaching an
artificial TYPE_DECL to such pointed-to type. This forces the
sizes evaluation at a safe point and ensures it is not deferred
until e.g. within a deeper conditional context.
We expect nothing to be needed here for PARM or TYPENAME.
Pushing a TYPE_DECL at this point for TYPENAME would actually
be incorrect, as we might be in the middle of an expression
with side effects on the pointed-to type size "arguments" prior
to the pointer declaration point and the fake TYPE_DECL in the
enclosing context would force the size evaluation prior to the
side effects. */
if (!TYPE_NAME (type)
&& (decl_context == NORMAL || decl_context == FIELD)
&& variably_modified_type_p (type, NULL_TREE))
{
tree decl = build_decl (loc, TYPE_DECL, NULL_TREE, type);
DECL_ARTIFICIAL (decl) = 1;
pushdecl (decl);
finish_decl (decl, loc, NULL_TREE, NULL_TREE, NULL_TREE);
TYPE_NAME (type) = decl;
}
in grokdeclarator. The reason why this doesn't trigger in the cast case is
that it uses groktypename which sets decl_context to TYPENAME. Now, I can
understand in some cases we don't want any DECL_EXPRs, e.g. in sizeof, alignof,
_Alignas. But in C case we as this testcase shows need it.
What about _Atomic ( type-name ), typeof, generic, va_arg, offsetof,
types_compatible_p, ObjC at encode, compound literals? There is also OpenMP
UDR (though, perhaps that doesn't want them, for them to be used one needs a
compatible type to be somewhere else for it to match).
So, shall groktypename have a boolean or similar arg whether it wants them or
not and shall we use separate decl_context for TYPENAME which would add the
DECL_EXPRs and e.g. SIZEOF which wouldn't?
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Subject: [Bug tree-optimization/83238] [8 Regression] [graphite] ICE in graphite_can_represent_scev, at graphite-scop-detection.c:971
Date: Fri, 01 Dec 2017 17:46:00 -0000
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----------------------------------------------------------------------------
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Subject: [Bug libstdc++/82522] std::map::insert(value_type &&) not selected
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Dec 1 17:50:59 2017
New Revision: 255330
URL: https://gcc.gnu.org/viewcvs?rev=255330&root=gcc&view=rev
Log:
PR libstdc++/82522 overload map insert functions for rvalues (LWG 2354)
Backport from mainline
2017-10-13 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/82522
* doc/xml/manual/intro.xml: Document LWG 2354 changes.
* include/bits/stl_map.h (map::insert(value_type&&))
(map::insert(const_iterator, value_type&&)): Add overload for rvalues.
* include/bits/stl_multimap.h (multimap::insert(value_type&&))
(multimap::insert(const_iterator, value_type&&)): Likewise.
* include/bits/unordered_map.h (unordered_map::insert(value_type&&))
(unordered_map::insert(const_iterator, value_type&&))
(unordered_multimap::insert(value_type&&))
(unordered_multimap::insert(const_iterator, value_type&&)): Likewise.
* testsuite/23_containers/map/modifiers/insert/dr2354.cc: New test.
* testsuite/23_containers/multimap/modifiers/insert/dr2354.cc: New
test.
* testsuite/23_containers/unordered_map/insert/dr2354.cc: New test.
* testsuite/23_containers/unordered_multimap/insert/dr2354.cc: New
test.
Added:
branches/gcc-7-branch/libstdc++-v3/testsuite/23_containers/map/modifiers/insert/dr2354.cc
branches/gcc-7-branch/libstdc++-v3/testsuite/23_containers/multimap/modifiers/insert/dr2354.cc
branches/gcc-7-branch/libstdc++-v3/testsuite/23_containers/unordered_map/insert/dr2354.cc
branches/gcc-7-branch/libstdc++-v3/testsuite/23_containers/unordered_multimap/insert/dr2354.cc
Modified:
branches/gcc-7-branch/libstdc++-v3/ChangeLog
branches/gcc-7-branch/libstdc++-v3/doc/xml/manual/intro.xml
branches/gcc-7-branch/libstdc++-v3/include/bits/stl_map.h
branches/gcc-7-branch/libstdc++-v3/include/bits/stl_multimap.h
branches/gcc-7-branch/libstdc++-v3/include/bits/unordered_map.h
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Subject: [Bug middle-end/81046] [8 Regression] FAIL: gcc.dg/pr28796-2.c execution test
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That patch has been reverted in r249050 and from what I can see, hasn't been
applied again afterwards.
So is this still a problem?
In any case, hppa -> P4.
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Subject: [Bug libstdc++/82522] std::map::insert(value_type &&) not selected
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 7.3
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Subject: [Bug c++/68810] [8 regression] FAIL: g++.dg/cpp0x/constexpr-reinterpret1.C -- test for errors -- -m32
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--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
David, does your patchset solve this?
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John David Anglin <danglin at gcc dot gnu.org> changed:
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Fixed.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81158
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I don't see these in the current gcc-testresults.
Judging from gcc-testresults, has this been fixed with r250295 ?
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Subject: [Bug fortran/83224] creating character array from elements shorter than declared does not pad with whitespace properly and aborts
Date: Fri, 01 Dec 2017 18:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83224
--- Comment #8 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Fri Dec 1 18:06:31 2017
New Revision: 255331
URL: https://gcc.gnu.org/viewcvs?rev=255331&root=gcc&view=rev
Log:
2017-12-01 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/83224
* frontend-passes.c (create_var): Also handle
character arrays, handling deferred lenghts.
2017-12-01 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/83224
* gfortran.dg/dependency_51.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/dependency_51.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/frontend-passes.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/68241] [meta-bug] [F03] Deferred-length character
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
Bug 68241 depends on bug 83224, which changed state.
Bug 83224 Summary: creating character array from elements shorter than declared does not pad with whitespace properly and aborts
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83224
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/83224] creating character array from elements shorter than declared does not pad with whitespace properly and aborts
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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--- Comment #9 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed on trunk, closing.
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Subject: [Bug fortran/82367] ICE with deferred length string allocate on non-deferred length argument
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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CC| |tkoenig at gcc dot gnu.org
--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to kargl from comment #3)
> % svn diff resolve.c
> Index: resolve.c
> ===================================================================
> --- resolve.c (revision 253236)
> +++ resolve.c (working copy)
> @@ -7387,8 +7387,14 @@ resolve_allocate_expr (gfc_expr *e, gfc_code *code, bo
> if (code->ext.alloc.ts.type == BT_CHARACTER && !e->ts.deferred
> && !UNLIMITED_POLY (e))
> {
> - int cmp = gfc_dep_compare_expr (e->ts.u.cl->length,
> - code->ext.alloc.ts.u.cl->length);
> + int cmp;
> +
> + if (!e->ts.u.cl->length)
> + goto failure;
> +
> + cmp = gfc_dep_compare_expr (e->ts.u.cl->length,
> + code->ext.alloc.ts.u.cl->length);
> +
> if (cmp == 1 || cmp == -1 || cmp == -3)
> {
> gfc_error ("Allocating %s at %L with type-spec requires the same "
Looks good (and obvious, too). Pre-approved.
>From gcc-bugs-return-583787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 18:15:56 2017
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Subject: [Bug inline-asm/83244] inline assembly does not verify input operands allocation
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Component|c++ |inline-asm
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
GCC does not have an integrated assembler just yet. There have been talks
about one but nothing besides that. On some targets (AIX for an example), the
assembler is the system one and not the GNU binutils one.
It is up to the user to use the correct constraint on the inline-asm such that
the assembler does not complain.
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83247] New: simplify (int)a_long < 0 when we know a_long fits in int
Date: Fri, 01 Dec 2017 18:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83247
Bug ID: 83247
Summary: simplify (int)a_long < 0 when we know a_long fits in
int
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: enhancement
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Target Milestone: ---
This code is based on basic_string_view::_S_compare, which should probably be
improved (just cast if int is big enough, otherwise always return something in
{-1,0,1}), but here is the missed optimization:
bool f(long long l){
if(l>1000) return false;
if(l<-1000) return true;
return (int)l<0;
}
It is equivalent to l<0, but not that easy for the compiler. Without the cast
in the last line, reassoc1 manages to get rid of the test l<-1000 and reassoc2
deals with l>1000. But with the cast, we are stuck. The easiest way I can think
of is in VRP to notice that l fits in int and simplify (int)l<0 to l<0 (which
the reassoc passes can handle later). On the other hand, as with all those
narrowing / promotion transformations, it isn't always clear if it is
beneficial by itself. If long long is emulated using 2 int-sized registers,
(int)l<0 is clearly cheaper than l<0, which only becomes worth it because of
the simplifications it allows.
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Subject: [Bug driver/83243] -fuse-ld=lld
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think this is a bad idea.
>From gcc-bugs-return-583790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 18:28:11 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80135] [6/7/8 Regression] ICE in output_constructor_regular_field, at varasm.c:4968
Date: Fri, 01 Dec 2017 18:28:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Yes, Jason and I agreed that arrays of structs with flexible array members
should be rejected (thus ice-on-invalid-code). It was not my intend to accept
this code. I just haven't gotten around to fixing it yet.
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Subject: [Bug c++/83248] New: Spuriously identifying template arguments
Date: Fri, 01 Dec 2017 18:33:00 -0000
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Bug ID: 83248
Summary: Spuriously identifying template arguments
Product: gcc
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On g++-5 in C++ 11, 14, 17 modes, this valid code fails to compile
(tested on g++-5.4 and 5.5, also failed on g++-4.9)
#include <iostream>
typedef unsigned long long cl_ulong __attribute__((aligned(8)));
void f()
{
cl_ulong x = 0;
std::cout << x;
}
template <class T> struct is_unsigned {};
template <> struct is_unsigned< unsigned long long> {};
template <> struct is_unsigned<const unsigned long long> {};
with the following error messages
Line13: error: redefinition of 'struct is_unsigned<long long unsigned int>'
template <> struct is_unsigned<const unsigned long long> {};
^
Line12: error: previous definition of 'struct is_unsigned<long long
unsigned int>'
template <> struct is_unsigned< unsigned long long> {};
^
G++-6, 7 (and 4.8) work fine.
I made this testcase by inspecting the bug report to Boost.TypeTraits
(https://svn.boost.org/trac10/ticket/13315).
I tried to make a smaller testcase, but I couldn't get one.
>From gcc-bugs-return-583792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 18:34:58 2017
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Subject: [Bug c++/80135] [6/7/8 Regression] ICE in output_constructor_regular_field, at varasm.c:4968
Date: Fri, 01 Dec 2017 18:34:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Can you please find time for that during GCC 8 stage3/stage4?
>From gcc-bugs-return-583793-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 18:41:48 2017
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Subject: [Bug sanitizer/81212] [6/7/8 Regression] -Wreturn-type is disabled when used together with -fsanitize=return
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42770
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42770&action=edit
gcc8-pr81212.patch
Untested fix.
>From gcc-bugs-return-583794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 18:47:22 2017
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Subject: [Bug c++/80135] [6/7/8 Regression] ICE in output_constructor_regular_field, at varasm.c:4968
Date: Fri, 01 Dec 2017 18:47:00 -0000
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'll see what I can do. You had some concerns with rejecting this code in bug
78635 comment 9. Presumably you have resolved those to your own satisfaction?
>From gcc-bugs-return-583795-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 18:57:49 2017
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Subject: [Bug c/82186] [7/8 Regression] ICE (segfault), VLA type with inlining
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--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
For C, what is supposed to happen is that every call to groktypename where
there might be side effects from the type name passes a non-null EXPR
argument, and then the caller arranges for evaluation of expression stored
in *EXPR at an appropriate point, if the language semantics mean it should
be evaluated. For example, c_cast_expr creates a C_MAYBE_CONST_EXPR which
is meant to ensure the expressions required for the type being cast to are
evaluated before the cast itself; sizeof handling ensures the expression
is only evaluated if the type is a VLA, not e.g. a pointer to VLA.
The evaluation has the happen at the right point within the containing
expression, e.g. in
(foo = bar (), (int (*)[foo = baz ()]) something)
the expression foo = baz () in the type name has to be evaluated after foo
= bar ().
Note that there are cases where the size expression may never be evaluated
- if the type of a conditional expression involves a VLA size expression
from an unevaluated half of that conditional expression. In that case,
there is undefined behavior at runtime (but as usual the compiler still
needs to accept that code, since whether the expression is evaluated is a
property of a particular execution of the program). See C99 DR#342 and
C99 DR#340.
>From gcc-bugs-return-583796-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 18:59:37 2017
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Subject: [Bug fortran/83246] internal compiler error or loader problem might be related to a PARAMETER statement being in a BLOCK
Date: Fri, 01 Dec 2017 18:59:00 -0000
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kargl at gcc dot gnu.org changed:
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CC| |kargl at gcc dot gnu.org
--- Comment #1 from kargl at gcc dot gnu.org ---
Reduce testcase.
program dusty_corner
implicit none
integer i
write(*,*) 'Block tests' ! If this line is comment out program works.
block
character(len=*), parameter :: &
& str(*) = [character(len=20) :: '1', '2', '3', '4', '5', 'xxxx' ]
open(10, status='scratch')
write(10, '(a)')(trim(str(i)), i=1, size(str))
close(10)
end block
end program dusty_corner
It seems that gfortran is having problems with an implicit-shaped-array.
>From gcc-bugs-return-583797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 19:22:18 2017
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Subject: [Bug fortran/83246] internal compiler error or loader problem might be related to a PARAMETER statement being in a BLOCK
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--- Comment #2 from urbanjost at comcast dot net ---
Created attachment 42771
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shorter case for just getting loader error
>From gcc-bugs-return-583798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 19:23:09 2017
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Subject: [Bug fortran/83246] internal compiler error or loader problem might be related to a PARAMETER statement being in a BLOCK
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Created attachment 42772
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shorter case for internal compiler error
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Subject: [Bug c++/80135] [6/7/8 Regression] ICE in output_constructor_regular_field, at varasm.c:4968
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The glibc people should know (or you can try building glibc).
That said, I think rejecting structs with flexible array members is
unnecessary, e.g. the C FE doesn't reject them either, what we should reject is
non-empty initializers of those inside arrays (because we can't grow the array
element sizes to accomodate them).
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Subject: [Bug target/83240] x86_64 vectorized sqrt of denormal yields -inf when DAZ=0
Date: Fri, 01 Dec 2017 19:26:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
"-funsafe-math-optimizations
Allow optimizations for floating-point arithmetic that (a) assume that
arguments and results are valid and (b) may violate IEEE or ANSI standards.
When used at link time, it may include libraries or startup files that change
the default FPU control word or other similar optimizations.
"
" may violate IEEE or ANSI standards" That means not dealing with denormals
(or rather subnormals).
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Subject: [Bug c++/80061] error on constexpr function with an unevaluated throw
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |benni.buch at gmail dot com
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 83242 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/83242] Never executed "throw" in constexpr function fails to compile
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed as a duplicated of pr80061.
*** This bug has been marked as a duplicate of bug 80061 ***
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From: "russ at yanofsky dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83249] New: C++11 Parameter pack deduced incorrectly in decltype return declaration
Date: Fri, 01 Dec 2017 19:50:00 -0000
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Bug ID: 83249
Summary: C++11 Parameter pack deduced incorrectly in decltype
return declaration
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: russ at yanofsky dot org
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Following code fails to compile with gcc 7.2.0 and versions back to 5.4.0. It
does successfully compile with clang.
What appears to happen is that arguments to S::g(P1... p1, P2... p2)
incorrectly become part of the "p1" parameter pack instead of "p2" parameter
pack. This only seems to happen when p1 is referenced inside a decltype return
type declaration. When "p1" and "p2" are referenced inside the actual function
body they are assigned correctly.
////////////////////////////////////////////////////////////////////
void f();
template <typename... P1>
struct S
{
template <typename... P2>
auto g(P1... p1, P2... p2) -> decltype(f(p1...));
};
void test() {
S<>().g(1, 2);
}
////////////////////////////////////////////////////////////////////
Command line and error output:
g++ -c -std=c++11 main.cpp
<source>: In function 'void test()':
11 : <source>:11:17: error: no matching function for call to 'S<>::g(int, int)'
S<>().g(1, 2);
^
7 : <source>:7:10: note: candidate: template<class ... P2> decltype (f(S::g::p1
...)) S<P1>::g(P1 ..., P2 ...) [with P2 = {P2 ...}; P1 = {}]
auto g(P1... p1, P2... p2) -> decltype(f(p1...));
^
7 : <source>:7:10: note: template argument deduction/substitution failed:
<source>: In substitution of 'template<class ... P2> decltype (f(S::g::p2 ...))
S<>::g<P2 ...>(P2 ...) [with P2 = {int, int}]':
11 : <source>:11:17: required from here
7 : <source>:7:45: error: too many arguments to function 'void f()'
auto g(P1... p1, P2... p2) -> decltype(f(p1...));
~^~~~~~~
1 : <source>:1:6: note: declared here
void f();
^
Compiler exited with result code 1
////////////////////////////////////////////////////////////////////
Tested with:
g++ (GCC-Explorer-Build) 7.2.0 https://godbolt.org/g/ma8oNz
g++ (Gentoo Hardened 6.4.0 p1.1) 6.4.0
g++ (Ubuntu 5.4.0-6ubuntu1~16.04.5) 5.4.0 20160609
g++-6 (Ubuntu/Linaro 6.3.0-18ubuntu2~16.04) 6.3.0 20170519
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Subject: [Bug target/81158] [8 regression] Many test case failures starting with r249424
Date: Fri, 01 Dec 2017 19:58:00 -0000
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--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
That would make sense. I think this can be closed.
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Subject: [Bug target/81158] [8 regression] Many test case failures starting with r249424
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
.
>From gcc-bugs-return-583806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 20:19:44 2017
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/79228] 'i' suffix for __complex__ extension interferes with C++14 UDLs for std::complex
Date: Fri, 01 Dec 2017 20:19:00 -0000
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Dec 1 20:19:07 2017
New Revision: 255335
URL: https://gcc.gnu.org/viewcvs?rev=255335&root=gcc&view=rev
Log:
PR c++/79228 - extensions hide C++14 complex literal operators
libcpp/
* expr.c (interpret_float_suffix): Ignore 'i' in C++14 and up.
(interpret_int_suffix): Likewise.
gcc/cp/
* parser.c (cp_parser_userdef_numeric_literal): Be helpful about
'i' in C++14 and up.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/complex_literals1.C
trunk/gcc/testsuite/g++.dg/cpp1y/complex_literals1a.C
trunk/gcc/testsuite/g++.dg/cpp1y/complex_literals2.C
trunk/gcc/testsuite/g++.dg/cpp1y/complex_literals2a.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/g++.dg/cpp0x/gnu_fext-numeric-literals.C
trunk/gcc/testsuite/g++.dg/cpp0x/std_fext-numeric-literals.C
trunk/libcpp/ChangeLog
trunk/libcpp/expr.c
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Subject: [Bug c++/79228] 'i' suffix for __complex__ extension interferes with C++14 UDLs for std::complex
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed: now the compiler will prefer the library suffix.
Incidentally, why doesn't complex<T> have a constructor from __complex T?
>From gcc-bugs-return-583808-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 20:25:52 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/50871] libstdc++ should be built with -Wpedantic and/or -Wsystem-headers
Date: Fri, 01 Dec 2017 20:25:00 -0000
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--- Comment #18 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #16)
> (In reply to Jason Merrill from comment #15)
> > > /home/jwakely/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/
> > > complex:1951: warning: floating point suffix 'if' shadowed by implementation
> >
> > This seems like a real issue. Perhaps for C++14 and up we should disable
> > the built-in complex suffixes.
>
> See PR 79228
Fixed.
>From gcc-bugs-return-583809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 20:36:28 2017
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Subject: [Bug target/81288] [6/7/8 Regression] ICE on 32-bit BE powerpc targets -w -misel -O2 (-O3, -Ofast, -Os)
Date: Fri, 01 Dec 2017 20:36:00 -0000
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Fri Dec 1 20:35:52 2017
New Revision: 255337
URL: https://gcc.gnu.org/viewcvs?rev=255337&root=gcc&view=rev
Log:
rs6000: Improve comparison rtx_cost (PR81288)
The current rs6000 rtx_cost for comparisons against 0 is very high if
TARGET_ISEL && !TARGET_MFCRF, much higher than for reg-reg comparisons,
much higher than a load of 0 and such a reg-reg-comparison. This leads
to infinite recursion in CSE (see PR81288).
This patch removes the too-high cost, also simplifying this code.
PR 81288/target
* config/rs6000/rs6000.c (rs6000_rtx_costs): Do not handle
TARGET_ISEL && !TARGET_MFCRF differently. Simplify code.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/rs6000/rs6000.c
>From gcc-bugs-return-583810-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 20:38:09 2017
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Subject: [Bug target/81288] [6/7/8 Regression] ICE on 32-bit BE powerpc targets -w -misel -O2 (-O3, -Ofast, -Os)
Date: Fri, 01 Dec 2017 20:38:00 -0000
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--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Fri Dec 1 20:37:33 2017
New Revision: 255338
URL: https://gcc.gnu.org/viewcvs?rev=255338&root=gcc&view=rev
Log:
rs6000: Improve comparison rtx_cost (PR81288)
The current rs6000 rtx_cost for comparisons against 0 is very high if
TARGET_ISEL && !TARGET_MFCRF, much higher than for reg-reg comparisons,
much higher than a load of 0 and such a reg-reg-comparison. This leads
to infinite recursion in CSE (see PR81288).
This patch removes the too-high cost, also simplifying this code.
PR 81288/target
* config/rs6000/rs6000.c (rs6000_rtx_costs): Do not handle
TARGET_ISEL && !TARGET_MFCRF differently. Simplify code.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/rs6000/rs6000.c
>From gcc-bugs-return-583811-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 20:39:48 2017
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Subject: [Bug target/81288] [6/7/8 Regression] ICE on 32-bit BE powerpc targets -w -misel -O2 (-O3, -Ofast, -Os)
Date: Fri, 01 Dec 2017 20:39:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |NEW
Assignee|segher at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed for powerpc on all open branches. Still needs to be handled for
powerpcspe.
>From gcc-bugs-return-583812-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 20:53:50 2017
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Subject: [Bug middle-end/83239] False positive from -Wstringop-overflow on simple std::vector code
Date: Fri, 01 Dec 2017 20:53:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-01
CC| |msebor at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=79095
Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed (with -O3, the warning doesn't trigger at -O2 for me on x86_64).
There was a similar report last year involving vector (pr79095) that Jeff fixed
in r245434. Either the fix is incomplete or this case is sufficiently
different that the fix is not effective. The invalid memset in this case first
also appears in a dump of the ldist pass, same as in pr79095:
<bb 13> [local count: 357916946]:
_1 = _17 + 18446744073709551614;
if (_1 > _17)
goto <bb 14>; [33.00%]
else
goto <bb 30>; [67.00%]
<bb 14> [local count: 59056296]:
_83 = a$16_134 - a$8_73;
_84 = _83 /[ex] 4;
_85 = (long unsigned int) _84;
if (_85 > 18446744073709551613)
goto <bb 42>; [67.00%]
else
goto <bb 16>; [33.00%]
<bb 42> [local count: 39567718]:
__builtin_memset (a$8_73, 0, 18446744073709551608);
An alternate solution to trying to nail down all these cases in VRP is to
recognize calls with these excessive sizes either before they are introduced
and avoid introducing them, or afterwards and replace them with a trap. The
patch I had originally submitted for bug 79095
(https://gcc.gnu.org/ml/gcc-patches/2017-01/msg01152.html) does that and it
eliminates this warning.
The missing location is due to the code that introduces the memset call
neglecting to set the location.
As for the name of the option, its name comes from the String handling section
in the C standard which defines both raw memory functions (e.g., memset) and
string functions (e.g., strcpy), all of them declared in <string.h>.
>From gcc-bugs-return-583813-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 20:58:17 2017
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Subject: [Bug middle-end/83239] False positive from -Wstringop-overflow on simple std::vector code
Date: Fri, 01 Dec 2017 20:58:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Jeff, do you have a preference for how to handle this? Should we revisit the
trap approach or or try to handle it in VRP (if that's where it breaks down)?
>From gcc-bugs-return-583814-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 21:15:40 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83231] ICE on constexpr evaluation
Date: Fri, 01 Dec 2017 21:15:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-01
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |4.8.3, 4.9.3, 5.3.0, 6.2.0,
| |7.1.0, 8.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The ICE seems to go as far back as the introduction of the
-std=c++1y option in GCC 4.8.0 (r185596) so it doesn't look like a regression.
The full output and stack trace with the top of trunk (8.0) is below:
t.C: In function ‘void guid_tests()’:
t.C:15:34: in ‘constexpr’ expansion of ‘is_equal(some_guid, some_guid)’
t.C:15:55: internal compiler error: in cxx_eval_bit_field_ref, at
cp/constexpr.c:2608
constexpr bool val = is_equal(some_guid, some_guid);
^
0x82927e cxx_eval_bit_field_ref
/ssd/src/gcc/git/gcc/cp/constexpr.c:2608
0x8313ca cxx_eval_constant_expression
/ssd/src/gcc/git/gcc/cp/constexpr.c:4422
0x830bd7 cxx_eval_constant_expression
/ssd/src/gcc/git/gcc/cp/constexpr.c:4235
0x8269cc cxx_eval_binary_expression
/ssd/src/gcc/git/gcc/cp/constexpr.c:2001
0x8311f8 cxx_eval_constant_expression
/ssd/src/gcc/git/gcc/cp/constexpr.c:4379
0x8293c5 cxx_eval_logical_expression
/ssd/src/gcc/git/gcc/cp/constexpr.c:2634
0x831254 cxx_eval_constant_expression
/ssd/src/gcc/git/gcc/cp/constexpr.c:4387
0x82e349 cxx_eval_store_expression
/ssd/src/gcc/git/gcc/cp/constexpr.c:3640
0x830962 cxx_eval_constant_expression
/ssd/src/gcc/git/gcc/cp/constexpr.c:4196
0x830a66 cxx_eval_constant_expression
/ssd/src/gcc/git/gcc/cp/constexpr.c:4208
0x825554 cxx_eval_call_expression
/ssd/src/gcc/git/gcc/cp/constexpr.c:1688
0x8300ce cxx_eval_constant_expression
/ssd/src/gcc/git/gcc/cp/constexpr.c:4118
0x832c09 cxx_eval_outermost_constant_expr
/ssd/src/gcc/git/gcc/cp/constexpr.c:4756
0x8333d2 cxx_constant_value(tree_node*, tree_node*)
/ssd/src/gcc/git/gcc/cp/constexpr.c:4864
0xae9926 store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
/ssd/src/gcc/git/gcc/cp/typeck2.c:827
0x88e79e check_initializer
/ssd/src/gcc/git/gcc/cp/decl.c:6352
0x892075 cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
/ssd/src/gcc/git/gcc/cp/decl.c:7024
0x99212c cp_parser_init_declarator
/ssd/src/gcc/git/gcc/cp/parser.c:19589
0x98550e cp_parser_simple_declaration
/ssd/src/gcc/git/gcc/cp/parser.c:12938
0x985072 cp_parser_block_declaration
/ssd/src/gcc/git/gcc/cp/parser.c:12756
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-583815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 21:17:34 2017
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Subject: [Bug target/83240] x86_64 vectorized sqrt of denormal yields -inf when DAZ=0
Date: Fri, 01 Dec 2017 21:17:00 -0000
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(this PR is vaguely related to PR 57974)
Unrelated, but I am surprised we don't end up computing at compile-time in this
example. We vectorize sqrt before unrolling the first loop and getting the
constants. And by the time we see
a[0] = 1.00000003593912982384429052190829644815948084413615813091e-36;
a[1] = 9.99999991097578965450144252348949782882164643167775990862e-38;
a[2] = 9.99999935045640392457461415399766451285519391957298315801e-39;
a[3] = 1.0000002153053332574208756001456831092687456480096866911e-39;
vect__5.2_42 = MEM[(float *)&a];
vect__6.3_39 = SQRT (vect__5.2_42);
it is too late for SLP to create a constant vector. Store merging merges the
stores by pairs, not good enough, and anyway this is the end of the pipeline,
we wouldn't have any passes left to optimize the result.
>From gcc-bugs-return-583816-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 21:47:07 2017
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Subject: [Bug c/83236] "Did you mean" suggestions maybe shouldn't offer implementation-private names
Date: Fri, 01 Dec 2017 21:47:00 -0000
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--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch: https://gcc.gnu.org/ml/gcc-patches/2017-12/msg00066.html
>From gcc-bugs-return-583817-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 21:55:21 2017
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From: "zoltan at hidvegi dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83250] New: _mm256_zextsi128_si256 missing for AVX2 zero extension
Date: Fri, 01 Dec 2017 21:55:00 -0000
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Bug ID: 83250
Summary: _mm256_zextsi128_si256 missing for AVX2 zero extension
Product: gcc
Version: 7.2.1
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Target: x86_64-*-*
I would like to zero out the upper 128-bit of a 256-bit vector. The Intel
intrinsics for that is _mm256_zextsi128_si256 but it's missing from gcc-7. The
Intel docs says that it should generate no code, but sometimes it is necessary
to generate vmovdqa %xmm0,%xmm0. Usually this is not necessary, since it is
enough to change the instruction generating the value to use 128-bit AVX on xmm
which auto-zeroes. _mm256_castsi128_si256 is similar, but leaves the upper bits
undefined.
Workaround is
__m256i get_lo(__m256i x)
{
__m128i r;
__asm__("vmovdqa %1,%0" : "=x" (r) : "x" (_mm256_castsi256_si128(x)));
return _mm256_castsi128_si256(r);
}
I would like to write that without inline asm, and it seems that gcc can
sometimes generate vmov for zero-extension, but I do not know how to trigger
that.
>From gcc-bugs-return-583818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 22:09:44 2017
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Subject: [Bug tree-optimization/82103] spurious stringop-overflow warning
Date: Fri, 01 Dec 2017 22:09:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|rtl-optimization |tree-optimization
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=83239
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Oddly, this only happens with the statement expression, not with direct calls
to memset.
The invalid memset first shows up in the .phicprop2 dump which shows the output
below. This seems like another instance (similar to pr83239) where the value
of the size operand to one these built-ins could be checked and, if it's
invalid/out-of-bounds, the call replaced with a trap.
;; Function g (g, funcdef_no=0, decl_uid=1839, cgraph_uid=0, symbol_order=0)
...
Replacing '__n_38' with constant '4294967295'
Original statement:memset (_16, 0, __n_38);
Updated statement:memset (_16, 0, 4294967295);
...
g (char * data, unsigned int frame_size, _Bool c)
{
unsigned int __n;
unsigned int __n;
unsigned int _1;
char * _6;
char * _16;
char * _22;
unsigned int _25;
unsigned int _28;
<bb 2> [local count: 1073741825]:
if (frame_size_8(D) != 0)
goto <bb 3>; [33.00%]
else
goto <bb 10>; [67.00%]
<bb 3> [local count: 354334802]:
memset (data_10(D), 5, frame_size_8(D));
if (c_12(D) != 0)
goto <bb 4>; [0.00%]
else
goto <bb 5>; [100.00%]
<bb 4> [local count: 354334802]:
f ();
<bb 5> [local count: 719407025]:
_1 = frame_size_8(D) >> 1;
__n_14 = _1 + 4294967295;
_6 = data_10(D) + _1;
_25 = _1 + 4294967285;
if (__n_14 != 0)
goto <bb 7>; [0.00%]
else
goto <bb 6>; [100.00%]
<bb 6> [local count: 719407025]:
# _22 = PHI <_6(5), _16(9), _6(7)>
# _28 = PHI <_25(5), 4294967285(9), _25(7)>
memset (_22, 4, _28);
goto <bb 8>; [100.00%]
<bb 7> [local count: 719407025]:
memset (_6, 0, __n_14);
if (_25 != 0)
goto <bb 6>; [0.00%]
else
goto <bb 8>; [100.00%]
<bb 8> [local count: 1073741825]:
return;
<bb 9> [local count: 354334800]:
_16 = data_10(D);
memset (_16, 0, 4294967295);
goto <bb 6>; [100.00%]
<bb 10> [local count: 719407025]:
if (c_12(D) != 0)
goto <bb 4>; [50.75%]
else
goto <bb 9>; [49.25%]
}
>From gcc-bugs-return-583819-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 22:26:50 2017
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Subject: [Bug middle-end/83239] False positive from -Wstringop-overflow on simple std::vector code
Date: Fri, 01 Dec 2017 22:26:00 -0000
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #1)
> In the mean time, we fail to find some VRP optimizations that might help
> with the warning.
>
> _1 = _186 + 18446744073709551614;
> if (_1 > _186)
>
> _186: [3, +INF]
>
> Possibly because we haven't turned it into ADD_OVERFLOW yet (or because we
> are missing a specific transform, or because we have one in match.pd but
> don't call it, or because !single_use, I didn't check), we don't fold that
> to false.
Ah, at some point I wanted to have match.pd optimize _1 > _186 to _186 < 2
(which would then be optimized easily in VRP), but that was breaking Jakub's
code to detect ADD_OVERFLOW. Improving that code would be nice. We could also
generate ADD_OVERFLOW from match.pd when we see x+n>x, but then I don't think
we have code to CSE that with a plain addition, so it wouldn't help.
>From gcc-bugs-return-583820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 22:45:00 2017
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Subject: [Bug tree-optimization/82103] spurious stringop-overflow warning
Date: Fri, 01 Dec 2017 22:45:00 -0000
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
This warning is "less wrong" than the other related ones. If frame_size is 0,
this does call memset(,,-1). And there is an explicit test for frame_size == 0
in the function, which makes it look like 0 is not such an absurd value for
frame_size. If we are going to keep the "maybe" variant of this warning at all,
warning for this function makes sense...
>From gcc-bugs-return-583821-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 23:19:01 2017
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From: "urbanjost at comcast dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83224] creating character array from elements shorter than declared does not pad with whitespace properly and aborts
Date: Fri, 01 Dec 2017 23:19:00 -0000
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--- Comment #10 from urbanjost at comcast dot net ---
Impressively quick resolution.
Thanks again!
>From gcc-bugs-return-583822-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 23:30:49 2017
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Subject: [Bug c/83251] New: __builtin___bnd_narrow_ptr_bounds(x, x, ...) generates wrong code that modifies a constant
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83251
Bug ID: 83251
Summary: __builtin___bnd_narrow_ptr_bounds(x, x, ...) generates
wrong code that modifies a constant
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: eggert at gnu dot org
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Created attachment 42773
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42773&action=edit
Test case main program (you also need foobody.i)
I ran into this problem trying to use -fcheck-pointer-bounds on GNU Emacs. I
used gcc (Ubuntu 7.2.0-8ubuntu3) 7.2.0 on x86-64 (Ubuntu 17.10); my CPU was a
Kaby Lake processor (Intel Core i3-7100U) that supports Intel MPX. To
reproduce, compile and run the attached source code as follows:
gcc -mmpx -fcheck-pointer-bounds -O2 -S foobody.i foomain.i
gcc -mmpx -fcheck-pointer-bounds -O2 foobody.s foomain.s
./a.out
a.out's output contains many incorrect lines like this:
Saw a #BR! status 1 at 0x55fae4af26da
The problem occurs because incorrect code is generated for the function
'calculate_address', whose source code looks like this:
Lisp_Object *sym = &lispsym[1213];
char *narsym = __builtin___bnd_narrow_ptr_bounds (sym, sym,
sizeof (Lisp_Object));
return (Lisp_Object) (narsym + sizeof *sym);
This is a pure function that merely calculates an address and returns it.
Instead, as foobody.s shows, this function's implementation also modifies
global metadata, for example:
movq 8+__chkp_bounds_of_lispsym(%rip), %rax
cmpq %rdx, %rax
cmovb %rdx, %rax
movq %rax, 8+__chkp_bounds_of_lispsym(%rip)
Here calculate_address's implementation conditionally shrinks
__chkp_bounds_of_lispsym, the bounds of the 'lispsym' array. But lispsym is a
static array and its bounds should never change. As a result of this mistaken
implementation, later valid attempts to access the lispsym array (in
'obviously_safe') fail their bounds check and this mistake in GCC causes the
program to crash even though it is a valid program.
>From gcc-bugs-return-583823-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 23:31:37 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83251] __builtin___bnd_narrow_ptr_bounds(x, x, ...) generates wrong code that modifies a constant
Date: Fri, 01 Dec 2017 23:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83251
--- Comment #1 from Paul Eggert <eggert at gnu dot org> ---
Created attachment 42774
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42774&action=edit
Test case subroutines (you also need foomain.i)
>From gcc-bugs-return-583824-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 01 23:52:56 2017
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81959] PowerPC __float128 optimization fails with integer PRE_INC addresses
Date: Fri, 01 Dec 2017 23:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81959
--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri Dec 1 23:52:20 2017
New Revision: 255341
URL: https://gcc.gnu.org/viewcvs?rev=255341&root=gcc&view=rev
Log:
[gcc]
2017-12-01 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/81959
* config/rs6000/rs6000.c (rs6000_address_for_fpconvert): Check for
whether we can allocate pseudos before trying to fix an address.
* config/rs6000/rs6000.md (float_<mode>si2_hw): Make sure the
memory address is indexed or indirect.
(floatuns_<mode>si2_hw2): Likewise.
[gcct/testsuite]
2017-12-01 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/81959
* gcc.target/powerpc/pr81959.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr81959.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/config/rs6000/rs6000.md
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-583825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 00:01:19 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83236] "Did you mean" suggestions maybe shouldn't offer implementation-private names
Date: Sat, 02 Dec 2017 00:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83236
--- Comment #3 from Zack Weinberg <zackw at panix dot com> ---
Maybe name_reserved_for_implementation_p should be a langhook?
>From gcc-bugs-return-583826-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 00:27:22 2017
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Subject: [Bug target/83252] New: Wrong code with "-march=skylake-avx512 -O3"
Date: Sat, 02 Dec 2017 00:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83252
Bug ID: 83252
Summary: Wrong code with "-march=skylake-avx512 -O3"
Product: gcc
Version: 8.0
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Created attachment 42775
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42775&action=edit
reproducer
gcc trunk rev255248, x86_64.
Attached test case produces wrong code:
> g++ -O0 f.cpp -o out
> g++ -march=skylake-avx512 -O3 f.cpp -o out3
> ./out
88480289
> ./out3
88480288
I was not able to reduce it further. At this point the test case doesn't
contain undefined behavior (at least address and undefined behavior sanitizers
think so). Original test case didn't have undefined behavior guaranteed by the
way it was generated, but while reduction it could be possibly introduced, but
to my judgement it's a valid test case without UB.
Note that to reproduce it's essential to compile with "-march=skylake-avx512
-O3".
Sadly, gcc doesn't provide any bug pointing functionality, which would help
understanding the root cause of the bug without digging into compiler
internals. icc and clang have triaging flags (see
https://llvm.org/docs/OptBisect.html for clang implementation of this
mechanism). It would be very helpful to have similar functionality in gcc. If
I'm missing something, I would appreciate pointers to documents describing how
to triage this kind of bugs in gcc.
>From gcc-bugs-return-583827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 00:43:47 2017
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From: "mikulas at artax dot karlin.mff.cuni.cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83253] New: -ftree-slsr causes performance regression
Date: Sat, 02 Dec 2017 00:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83253
Bug ID: 83253
Summary: -ftree-slsr causes performance regression
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
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The straight-line strength reduce optimization causes code size increase and
performance degradation in some cases. I reduced it to this simple function:
unsigned test_2(unsigned char *ptr, unsigned long scale)
{
if (*(ptr + scale)) {
return *(unsigned *)(ptr + scale * 4);
}
return 3;
}
The slsr optimization translates the function into:
unsigned test_2(unsigned char *ptr, unsigned long scale)
{
unsigned char *tmp = ptr + scale;
if (*tmp) {
return *(unsigned *)(tmp + scale * 3);
}
return 3;
}
We can see that it replaces a multiplication by 4 with a multiplication by 3.
Consequently, the backend won't generate the instruction with scaled
addressing. A similar problem happens without pointers, only with integer
arithmetics - if the function contains the expression "val + scale" and "val +
scale * 4", the slsr optimization will try to reuse the first expression for
calculating the second expression - it will replace multiplication by 4 with
multiplication by 3, that is less efficient.
The slsr pass should be fixed, so that it recognizes that replacing a
multiplication by a power of two with a multiplication by non-power of two is
never benefical.
The misoptimization happens only with some architectures and some target
processors:
* on X86, it happens when optimizing for 32-bit processors (i386, i486, i586,
i686, pentium4)
* on X86-64, it happens only when optimizing for nocona
* on ARM, it happens when optimizing for cortex-a7, cortex-a5 and the older
cores (arm11...)
* on aarch64, it happens when optimizing for cortex-a53 or cortex-a35
* it also happens on alpha, hppa, sh4
Example code:
unsigned test_1(unsigned char *ptr, unsigned long scale)
{
return *(unsigned *)(ptr + scale * 4);
}
unsigned test_2(unsigned char *ptr, unsigned long scale)
{
if (*(ptr + scale)) {
return *(unsigned *)(ptr + scale * 4);
}
return 3;
}
unsigned long test_3(unsigned long val, unsigned long scale)
{
if (val + scale) {
return val + scale * 4;
}
return 3;
}
The results:
$ arm-linux-gnueabihf-gcc-7 -O2 -mcpu=cortex-a7 -c shladd.c
$ arm-linux-gnueabihf-objdump -d shladd.o
00000000 <test_1>:
--- this is the optimal code
0: f850 0021 ldr.w r0, [r0, r1, lsl #2]
4: 4770 bx lr
6: bf00 nop
00000008 <test_2>:
8: 5c43 ldrb r3, [r0, r1]
a: 1842 adds r2, r0, r1
c: b123 cbz r3, 18 <test_2+0x10>
--- here we can see multiplication by 3, although there was no multiplication
by 3 in the source code
e: 2303 movs r3, #3
10: fb03 f101 mul.w r1, r3, r1
14: 5850 ldr r0, [r2, r1]
16: 4770 bx lr
18: 2003 movs r0, #3
1a: 4770 bx lr
0000001c <test_3>:
1c: 1840 adds r0, r0, r1
1e: bf1a itte ne
20: 2303 movne r3, #3
--- again - multiply-add by 3
22: fb03 0001 mlane r0, r3, r1, r0
26: 2003 moveq r0, #3
28: 4770 bx lr
2a: bf00 nop
$ aarch64-linux-gnu-gcc-7 -O2 -mcpu=cortex-a53 -c shladd.c
$ aarch64-linux-gnu-objdump -d shladd.o
0000000000000000 <test_1>:
--- scaled addressing
0: b8617800 ldr w0, [x0, x1, lsl #2]
4: d65f03c0 ret
8: d503201f nop
c: d503201f nop
0000000000000010 <test_2>:
10: 8b010002 add x2, x0, x1
14: 38616800 ldrb w0, [x0, x1]
18: 34000080 cbz w0, 28 <test_2+0x18>
--- multiplication by 3
1c: 8b010421 add x1, x1, x1, lsl #1
--- no scaled addressing
20: b8616840 ldr w0, [x2, x1]
24: d65f03c0 ret
28: 52800060 mov w0, #0x3 // #3
2c: d65f03c0 ret
0000000000000030 <test_3>:
30: 8b010000 add x0, x0, x1
--- multiplication by 3
34: 8b010421 add x1, x1, x1, lsl #1
38: 8b000021 add x1, x1, x0
3c: f100001f cmp x0, #0x0
40: d2800062 mov x2, #0x3 // #3
44: 9a821020 csel x0, x1, x2, ne // ne = any
48: d65f03c0 ret
$ x86_64-linux-gnu-gcc-7 -O2 -m32 -march=i686 -c shladd.c
$ x86_64-linux-gnu-objdump -d shladd.o
00000000 <test_1>:
0: 8b 44 24 04 mov 0x4(%esp),%eax
4: 8b 54 24 08 mov 0x8(%esp),%edx
8: 8b 04 90 mov (%eax,%edx,4),%eax
b: c3 ret
c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
00000010 <test_2>:
10: 8b 44 24 08 mov 0x8(%esp),%eax
14: 8b 54 24 04 mov 0x4(%esp),%edx
18: 01 c2 add %eax,%edx
1a: 80 3a 00 cmpb $0x0,(%edx)
1d: 74 11 je 30 <test_2+0x20>
--- here it uses lea to multiply by 3, instead of using addressing scaled by 4
1f: 8d 04 40 lea (%eax,%eax,2),%eax
22: 8b 04 02 mov (%edx,%eax,1),%eax
25: c3 ret
26: 8d 76 00 lea 0x0(%esi),%esi
29: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
30: b8 03 00 00 00 mov $0x3,%eax
35: c3 ret
36: 8d 76 00 lea 0x0(%esi),%esi
39: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
00000040 <test_3>:
40: 8b 54 24 08 mov 0x8(%esp),%edx
44: 89 d1 mov %edx,%ecx
46: 03 4c 24 04 add 0x4(%esp),%ecx
4a: 74 0c je 58 <test_3+0x18>
--- again, multiplication by 3 and addition
4c: 8d 04 52 lea (%edx,%edx,2),%eax
4f: 01 c8 add %ecx,%eax
51: c3 ret
52: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
58: b8 03 00 00 00 mov $0x3,%eax
5d: c3 ret
$ x86_64-linux-gnu-gcc-7 -O2 -m64 -march=nocona -c shladd.c
$ x86_64-linux-gnu-objdump -d shladd.o
0000000000000000 <test_1>:
0: 8b 04 b7 mov (%rdi,%rsi,4),%eax
3: c3 retq
0000000000000004 <test_2>:
4: 48 01 f7 add %rsi,%rdi
7: 80 3f 00 cmpb $0x0,(%rdi)
a: 74 08 je 14 <test_2+0x10>
--- multiplication by 3
c: 48 8d 04 76 lea (%rsi,%rsi,2),%rax
10: 8b 04 07 mov (%rdi,%rax,1),%eax
13: c3 retq
14: b8 03 00 00 00 mov $0x3,%eax
19: c3 retq
000000000000001a <test_3>:
1a: 48 01 f7 add %rsi,%rdi
1d: 74 08 je 27 <test_3+0xd>
--- multiplication by 3 and addition
1f: 48 8d 04 76 lea (%rsi,%rsi,2),%rax
23: 48 01 f8 add %rdi,%rax
26: c3 retq
27: b8 03 00 00 00 mov $0x3,%eax
2c: c3 retq
$ hppa-linux-gnu-gcc-7 -O2 -c shladd.c
$ hppa-linux-gnu-objdump -d shladd.o
00000000 <test_1>:
0: e8 40 c0 00 bv r0(rp)
--- here we use scaled addressing
4: 0f 59 20 9c ldw,s r25(r26),ret0
00000008 <test_2>:
8: 0f 3a 00 13 ldb r26(r25),r19
c: 34 1c 00 06 ldi 3,ret0
10: 86 60 20 10 cmpib,= 0,r19,20 <test_2+0x18>
14: 0b 3a 0a 1a add,l r26,r25,r26
--- the next instruction multiplies by 3
18: 0b 39 0a 59 shladd,l r25,1,r25,r25
--- and here we don't use scaled addressing
1c: 0f 3a 00 9c ldw r26(r25),ret0
20: e8 40 c0 02 bv,n r0(rp)
00000024 <test_3>:
24: 0b 3a 0a 1a add,l r26,r25,r26
28: 87 40 20 10 cmpib,= 0,r26,38 <test_3+0x14>
2c: 34 1c 00 06 ldi 3,ret0
--- the next instruction multiplies by 3
30: 0b 39 0a 59 shladd,l r25,1,r25,r25
34: 0b 59 0a 1c add,l r25,r26,ret0
38: e8 40 c0 02 bv,n r0(rp)
$ sh4-linux-gnu-gcc-7 -O2 -c shladd.c
$ sh4-linux-gnu-objdump -d shladd.o
00000000 <test_1>:
--- left shift by 2
0: 08 45 shll2 r5
2: 53 60 mov r5,r0
4: 0b 00 rts
6: 4e 00 mov.l @(r0,r4),r0
00000008 <test_2>:
8: 5c 34 add r5,r4
a: 40 61 mov.b @r4,r1
c: 18 21 tst r1,r1
e: 04 89 bt 1a <test_2+0x12>
--- reusing r4 and not using a shift
10: 53 60 mov r5,r0
12: 0c 30 add r0,r0
14: 5c 30 add r5,r0
16: 0b 00 rts
18: 4e 00 mov.l @(r0,r4),r0
1a: 0b 00 rts
1c: 03 e0 mov #3,r0
1e: 09 00 nop
00000020 <test_3>:
20: 5c 34 add r5,r4
22: 48 24 tst r4,r4
24: 04 89 bt 30 <test_3+0x10>
--- not using a shift
26: 53 60 mov r5,r0
28: 0c 30 add r0,r0
2a: 5c 30 add r5,r0
2c: 0b 00 rts
2e: 4c 30 add r4,r0
30: 0b 00 rts
32: 03 e0 mov #3,r0
$ alpha-linux-gnu-gcc-7 -O2 -c shladd.c
$ alpha-linux-gnu-objdump -d shladd.o
0000000000000000 <test_1>:
0: 51 14 20 42 s4addq a1,0,a1
4: 11 04 11 42 addq a0,a1,a1
8: 00 00 11 a0 ldl v0,0(a1)
c: 01 80 fa 6b ret
0000000000000010 <test_2>:
10: 10 04 11 42 addq a0,a1,a0
14: 03 00 1f 20 lda v0,3
18: 00 00 30 2c ldq_u t0,0(a0)
1c: c1 00 30 48 extbl t0,a0,t0
20: 04 00 20 e4 beq t0,34 <test_2+0x24>
--- multiplication by 4
24: 41 14 20 42 s4addq a1,0,t0
--- subtraction, so that a1 is multiplied by 3
28: 31 05 31 40 subq t0,a1,a1
2c: 10 04 11 42 addq a0,a1,a0
30: 00 00 10 a0 ldl v0,0(a0)
34: 01 80 fa 6b ret
38: 1f 04 ff 47 nop
3c: 00 00 fe 2f unop
0000000000000040 <test_3>:
40: 41 14 20 42 s4addq a1,0,t0
44: 00 04 11 42 addq a0,a1,v0
48: 10 04 01 42 addq a0,t0,a0
4c: 90 74 00 44 cmoveq v0,0x3,a0
50: 00 04 f0 47 mov a0,v0
54: 01 80 fa 6b ret
58: 1f 04 ff 47 nop
5c: 00 00 fe 2f unop
>From gcc-bugs-return-583828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 00:52:27 2017
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From: "woodard at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83254] New: gfortran doesn't consider c_loc addresses c_associated
Date: Sat, 02 Dec 2017 00:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83254
Bug ID: 83254
Summary: gfortran doesn't consider c_loc addresses c_associated
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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Created attachment 42776
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42776&action=edit
example program
gfortran 7.1 -> current trunk doesn't consider c_loc addresses c_associated the
way that earlier versions of gfortran does.
[ben@localhost cassoc]$ gfortran --version
GNU Fortran (GCC) 6.3.1 20170216 (Red Hat 6.3.1-3)
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
[ben@localhost cassoc]$ gfortran cassoc.f90 -o cassoc.6.3.1
[ben@localhost cassoc]$ ./cassoc.6.3.1
true
true
but it seems like something broke in the 7 series of compilers.
[ben@Mustang c_assoc]$ gfortran --version
GNU Fortran (GCC) 7.2.1 20170915 (Red Hat 7.2.1-2)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
[ben@Mustang c_assoc]$ gfortran cassoc.f90
[ben@Mustang c_assoc]$ ./a.out
true
false
The original report targeted 7.1 and the problem appears to persist all the way
to the current trunk.
>From gcc-bugs-return-583829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 00:59:10 2017
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Subject: [Bug tree-optimization/81165] [8 Regression] Regression in GCC-8.0.0's optimizer
Date: Sat, 02 Dec 2017 00:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81165
--- Comment #7 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
it may very well be the case that it is gcc7 that's buggy in optimizing out the
loop. after all, there is a divide-by-x0 in the loop entry test and, save for
global optimizations, the compiler couldn't tell x0 was nonzero. looking into
it...
>From gcc-bugs-return-583830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 01:24:38 2017
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Subject: [Bug target/43871] -mcpu=power4 -mtuneÎll emits power7/cell-only opcodes
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--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Sat Dec 2 01:23:41 2017
New Revision: 255349
URL: https://gcc.gnu.org/viewcvs?rev=255349&root=gcc&view=rev
Log:
rs6000: Set rs6000_cpu correctly (PR43871)
We set rs6000_cpu based on tune_index, but it should be cpu_index.
This patch fixes it.
PR target/43871
* config/rs6000/rs6000.c (rs6000_option_override_internal): Set
rs6000_cpu based on cpu_index, not tune_index.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
>From gcc-bugs-return-583831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 01:31:26 2017
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Subject: [Bug fortran/83254] gfortran doesn't consider c_loc addresses c_associated
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-12-02
CC| |kargl at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from kargl at gcc dot gnu.org ---
(In reply to Ben Woodard from comment #0)
>
> The original report targeted 7.1 and the problem appears to persist all the
> way to the current trunk.
>
How old is your current trunk? Janne committed a patch that may
have fixed this problem on 11/08/17. You need revision 254526
or newer.
Compiling a sightly modified version of you code and using
-fdump-tree-original with 7=branch I see
assert_true (logical(kind=4) & restrict var1)
{
if (!*var1)
{
_gfortran_abort ();
}
L.1:;
}
...
{
logical(kind=1) D.3498;
D.3498 = jvar != 0B && jvar == kvar;
assert_true (&D.3498);
}
That is obviously broken as the types are mismatched. With trunk, I see
assert_true (logical(kind=4) & restrict var1)
{
if (!*var1)
{
_gfortran_abort ();
}
L.1:;
}
{
logical(kind=4) D.3560;
D.3560 = jvar != 0B && jvar == kvar;
assert_true (&D.3560);
}
>From gcc-bugs-return-583832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 01:59:50 2017
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Subject: [Bug fortran/83254] gfortran doesn't consider c_loc addresses c_associated
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--- Comment #2 from Ben Woodard <woodard at redhat dot com> ---
my bad my trunk was out of date.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83255] New: [8 Regression] [graphite] Wrong code w/ -O1 -floop-nest-optimize
Date: Sat, 02 Dec 2017 04:11:00 -0000
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Bug ID: 83255
Summary: [8 Regression] [graphite] Wrong code w/ -O1
-floop-nest-optimize
Product: gcc
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gcc-8.0.0-alpha20171126 snapshot (r255155) produces wrong code w/ -O1 (-O2,
-O3, -Ofast) -floop-nest-optimize for the following snippet:
int rx, in;
int
main (void)
{
const int tj = 3;
int as[tj];
static int l4;
while (l4 < 1)
{
for (rx = 0; rx < tj; ++rx)
{
for (in = 0; in < tj; ++in)
as[in] = 1;
as[rx] = 0;
}
++l4;
}
return as[tj - 1];
}
% gcc-8.0.0-alpha20171126 -O1 -o good znyz2wee.c && ./good
% echo $?
0
% gcc-8.0.0-alpha20171126 -O1 -floop-nest-optimize -o bad znyz2wee.c && ./bad
zsh: exit 1 ./bad
% echo $?
1
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |trippels at gcc dot gnu.org
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> I think this is a bad idea.
I fully agree. There are several problems with the proposal:
We already have two functioning GNU linkers. I see lld as a direct
attack on the GNU licence.
Amdahl’s law: Even if lld links some apps faster than gold, nobody
will notice, because the linker is usually not the bottleneck.
In fact in most code bases compiling a single CU takes more time than
the final link.
The lld developers don't like/understand Linux in general.
Here is an example quote (from Rui Ueyama):
»Aah, I knew Unix DSO's are not efficient in resolving symbol names, but
it's too slow. I really don't like the Unix semantics of the dynamic
linking object. Windows is much better.
I also dislike the fact that ELF/Unix/C are trying to make DSOs usable
transparently. On Windows, you have to explicitly mark imported/exported
functions as dllimported/dllexported, and that is IMO much better than
trying to hide it.«
He also recently proposed to drop TLS relaxations in general, because
the lld relaxation code is a mess and does slow down lld...
So, I see no reason at all to support -fuse-ld=lld.
>From gcc-bugs-return-583835-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 06:21:13 2017
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Subject: [Bug fortran/83254] gfortran doesn't consider c_loc addresses c_associated
Date: Sat, 02 Dec 2017 06:21:00 -0000
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WORKSFORME
--- Comment #3 from kargl at gcc dot gnu.org ---
(In reply to Ben Woodard from comment #2)
> my bad my trunk was out of date.
Closing the bug as WORKSFORME. Note, it's better to get
a bug report that simply needs to be closed than no bug
report at all.
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From: "aoliva at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/81165] [8 Regression] Regression in GCC-8.0.0's optimizer
Date: Sat, 02 Dec 2017 07:32:00 -0000
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--- Comment #8 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
It is combine that simplifies a compare of _9 (aka t1) with 1: it knows _9 is
either -1 or 0 from the &1 followed by -1, so it can't be equal to 1. From
that simplification, others follow, and the loop exit test becomes a dead
computation that is eventually removed.
With the trunk, modified to disregard the 3rd argument to find_leader_in_sets,
we figure that out in gimple, in forwprop4, and eliminate the compare with 1.
We only realize both branches of the out-of-loop test end up at the same spot
after removing an unused assigned in one of the branches, later on, in dce7, at
which point the entire loop entry test becomes dead computation, but it lives
on all the way to rtl cse1.
With unmodified trunk, we introduce a new phi node at the merge after the
initial if statement, at the loop entry test, standing for (int)t1, and this
node seems to be what prevents the duplication of the loop entry block by dom3:
the node is used within the loop body (it's what gets compared with 1 to decide
whether or not the loop body traps). Without this duplication, we fail to
simplify the test because we don't know enough about t1 to enable
simplification. We'd have to keep separate (or split) the two paths out of the
if statement to be able to optimize it, or have some means to represent that t1
can only hold the values -1, 0, or 2, not 1.
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Subject: [Bug target/80583] [6/7/8 Regression] ICE with target attribute and vectorized float: internal compiler error: in convert_move, at expr.c:270
Date: Sat, 02 Dec 2017 07:55:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 2 07:54:47 2017
New Revision: 255353
URL: https://gcc.gnu.org/viewcvs?rev=255353&root=gcc&view=rev
Log:
PR target/78643
PR target/80583
* expr.c (get_inner_reference): If DECL_MODE of a non-bitfield
is BLKmode for vector field with vector raw mode, use TYPE_MODE
instead of DECL_MODE.
* gcc.target/i386/pr80583.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr80583.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/78643] [6/7/8 Regression] ICE in convert_move, at expr.c:230
Date: Sat, 02 Dec 2017 07:55:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 2 07:54:47 2017
New Revision: 255353
URL: https://gcc.gnu.org/viewcvs?rev=255353&root=gcc&view=rev
Log:
PR target/78643
PR target/80583
* expr.c (get_inner_reference): If DECL_MODE of a non-bitfield
is BLKmode for vector field with vector raw mode, use TYPE_MODE
instead of DECL_MODE.
* gcc.target/i386/pr80583.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr80583.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug sanitizer/81212] [6/7/8 Regression] -Wreturn-type is disabled when used together with -fsanitize=return
Date: Sat, 02 Dec 2017 07:57:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 2 07:57:04 2017
New Revision: 255354
URL: https://gcc.gnu.org/viewcvs?rev=255354&root=gcc&view=rev
Log:
PR c++/81212
* tree-cfg.c (pass_warn_function_return::execute): Handle
__builtin_ubsan_handle_missing_return like __builtin_unreachable
with BUILTINS_LOCATION.
* g++.dg/ubsan/pr81212.C: New test.
* g++.dg/ubsan/return-1.C: Add -Wno-return-type to dg-options.
* g++.dg/ubsan/return-2.C: Likewise.
* g++.dg/ubsan/return-7.C: Likewise.
Added:
trunk/gcc/testsuite/g++.dg/ubsan/pr81212.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/ubsan/return-1.C
trunk/gcc/testsuite/g++.dg/ubsan/return-2.C
trunk/gcc/testsuite/g++.dg/ubsan/return-7.C
trunk/gcc/tree-cfg.c
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Subject: [Bug tree-optimization/83241] [8 regression] ICE in verify_use after store-merging
Date: Sat, 02 Dec 2017 07:59:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 2 07:58:57 2017
New Revision: 255356
URL: https://gcc.gnu.org/viewcvs?rev=255356&root=gcc&view=rev
Log:
PR tree-optimization/83170
PR tree-optimization/83241
* gimple-ssa-store-merging.c
(imm_store_chain_info::try_coalesce_bswap): Update vuse field from
gimple_vuse (ins_stmt) in case it has changed.
(imm_store_chain_info::output_merged_store): Likewise.
* gcc.dg/store_merging_17.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/store_merging_17.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-store-merging.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83170] [8 Regression] ICE: Segmentation fault - during GIMPLE pass: store-merging
Date: Sat, 02 Dec 2017 07:59:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 2 07:58:57 2017
New Revision: 255356
URL: https://gcc.gnu.org/viewcvs?rev=255356&root=gcc&view=rev
Log:
PR tree-optimization/83170
PR tree-optimization/83241
* gimple-ssa-store-merging.c
(imm_store_chain_info::try_coalesce_bswap): Update vuse field from
gimple_vuse (ins_stmt) in case it has changed.
(imm_store_chain_info::output_merged_store): Likewise.
* gcc.dg/store_merging_17.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/store_merging_17.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-store-merging.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/80881] Implement Windows native TLS
Date: Sat, 02 Dec 2017 07:59:00 -0000
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Daniel Starke <daniel.f.starke at freenet dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work|5.3.0 |
--- Comment #16 from Daniel Starke <daniel.f.starke at freenet dot de> ---
Sorry, the wrong title was just me having mistaken wrong configuration options
in a newer GCC build with a regression. I have removed the "known to work"
version.
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Subject: [Bug target/80583] [6/7 Regression] ICE with target attribute and vectorized float: internal compiler error: in convert_move, at expr.c:270
Date: Sat, 02 Dec 2017 08:01:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7/8 Regression] ICE with |[6/7 Regression] ICE with
|target attribute and |target attribute and
|vectorized float: internal |vectorized float: internal
|compiler error: in |compiler error: in
|convert_move, at expr.c:270 |convert_move, at expr.c:270
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Subject: [Bug target/78643] [6/7 Regression] ICE in convert_move, at expr.c:230
Date: Sat, 02 Dec 2017 08:01:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7/8 Regression] ICE in |[6/7 Regression] ICE in
|convert_move, at expr.c:230 |convert_move, at expr.c:230
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Subject: [Bug sanitizer/81212] [6/7 Regression] -Wreturn-type is disabled when used together with -fsanitize=return
Date: Sat, 02 Dec 2017 08:01:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7/8 Regression] |[6/7 Regression]
|-Wreturn-type is disabled |-Wreturn-type is disabled
|when used together with |when used together with
|-fsanitize=return |-fsanitize=return
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-583847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 08:02:17 2017
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Subject: [Bug tree-optimization/83170] [8 Regression] ICE: Segmentation fault - during GIMPLE pass: store-merging
Date: Sat, 02 Dec 2017 08:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-583846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 08:02:05 2017
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Subject: [Bug tree-optimization/83241] [8 regression] ICE in verify_use after store-merging
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-583848-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 08:37:31 2017
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Subject: [Bug tree-optimization/81165] [8 Regression] Regression in GCC-8.0.0's optimizer
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--- Comment #9 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
The reason dom doesn't duplicate the loop entry test is that the additional phi
node grows it past the max-jump-thread-duplication-stmts limit. Compiling with
--param max-jump-thread-duplication-stmts=16 we get rid of all of the loop.
>From gcc-bugs-return-583849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 09:23:20 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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--- Comment #36 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sat Dec 2 09:22:41 2017
New Revision: 255357
URL: https://gcc.gnu.org/viewcvs?rev=255357&root=gcc&view=rev
Log:
PR target/81616
* x86-tune.def: Remove obsolette FIXMEs.
(X86_TUNE_PARTIAL_FLAG_REG_STALL): Disable for generic
(X86_TUNE_FUSE_CMP_AND_BRANCH_32, X86_TUNE_FUSE_CMP_AND_BRANCH_64,
X86_TUNE_FUSE_CMP_AND_BRANCH_SOFLAGS, X86_TUNE_FUSE_ALU_AND_BRANCH):
Enable for generic.
(X86_TUNE_PAD_RETURNS): Disable for generic.
* gcc.target/i386/pad-1.c: Compile for amdfam10.
* gcc.target/i386/align-limit.c: Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/x86-tune.def
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/align-limit.c
trunk/gcc/testsuite/gcc.target/i386/pad-1.c
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Subject: [Bug inline-asm/83244] inline assembly does not verify input operands allocation
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--- Comment #4 from Andrzej Lichnerowicz <unjello at gmail dot com> ---
Andrew, thank you for taking the time to shed more light on this. It all makes
sense now.
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Subject: [Bug fortran/83254] gfortran doesn't consider c_loc addresses c_associated
Date: Sat, 02 Dec 2017 10:23:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Resolution|WORKSFORME |DUPLICATE
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
To be precise, this broke with r243830 and got fixed with r254526.
So, marking as dup of PR82869.
*** This bug has been marked as a duplicate of bug 82869 ***
>From gcc-bugs-return-583852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 10:23:38 2017
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Subject: [Bug sanitizer/82869] c_associated does not always give false for null pointers
Date: Sat, 02 Dec 2017 10:23:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |woodard at redhat dot com
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 83254 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-583853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 10:37:10 2017
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Subject: [Bug target/83240] x86_64 vectorized sqrt of denormal yields -inf when DAZ=0
Date: Sat, 02 Dec 2017 10:37:00 -0000
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--- Comment #5 from Andreas Gustafsson <gson at gson dot org> ---
Re "may violate IEEE or ANSI standards", that argument could be used to justify
any behavior, even making 1 + 1 yield 42. Clearly the intent of
-funsafe-math-optimizations is not to allow arbitrary incorrect results, but
minor deviations from the standard such as differences in rounding or
evaluation order that result in reasonable approximations of the correct result
even if they differ from the exact result required by the standard.
When taking the square root of a very small positive number, a result of 0 is a
reasonable approximation of the correct result, even though it violates the
standard, but a result of minus infinity is not.
>From gcc-bugs-return-583854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 11:19:28 2017
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Subject: [Bug target/83252] Wrong code with "-march=skylake-avx512 -O3"
Date: Sat, 02 Dec 2017 11:19:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Option bisection is rarely useful for GCC, debugging issues with -Ox -fthat
-fno-this -fwhatever is usually not beneficial over just -Ox or whatever
minimal options you need it. Bisecting to what GCC version introduced the bug
or changed behavior is usually much better. Unfortunately my sde version
doesn't like this:
SDE ERROR: Cannot execute XGETBV with ECX != 0.
at (no-file):65 Function (no-func)
and I only have Haswell-E hw, so can't easily bisect this myself (at least not
until I upgrade sde).
>From gcc-bugs-return-583855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 11:21:05 2017
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Subject: [Bug target/83252] Wrong code with "-march=skylake-avx512 -O3"
Date: Sat, 02 Dec 2017 11:21:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
BTW, better avoid any headers if possible, so if:
long long int m33 = 8707493562598231894LL;
long long int m46 = 2720142332956971588LL;
long long int m30 = 5337614525613944604LL;
unsigned int m21 = 1092738485U;
long long int a43 = -2228108721620697360LL;
unsigned int a16 = 3060393125U;
long long int a103 = -5267148545474741934LL;
long long int a23 = 628644587444781171LL;
long long int a120 = -1929881923114969467LL;
unsigned int a31 = 342358347U;
unsigned int a50 = 4141428744U;
unsigned int a92 = 3147872734U;
long long int a20 = 2249711228974996732LL;
unsigned int a112 = 4012608111U;
unsigned int a113 = 664122423U;
unsigned int a55 = 795984700U;
unsigned int v38 = 751359462U;
unsigned int *p8 = &(v38);
unsigned int v64 = 274677517U;
unsigned long long int v36 = 14738459288714673932ULL;
unsigned int *p9 = &(v64);
unsigned int *p10 = &(a113);
unsigned long long int * p6 = &(v36);
long long int tt;
unsigned int yy;
long long int *p11 = &tt;
unsigned int *p12 = &yy;
unsigned long long int v12 = 5759377091529791657ULL;
unsigned long long int v146 = 15085582420970487994ULL;
unsigned long long int v176 = 13537462614340337437ULL;
unsigned int v114 = 3159284560U;
long long int v84 = -5592336281551563373LL;
unsigned int v44 = 916868838U;
unsigned long long int tf_0_var_108 = 122846687590239390ULL;
unsigned long long int tf_0_var_118 = 15084731736992858763ULL;
unsigned int tf_0_var_546 = 1383085329U;
long long int tf_0_var_142 = 676559977929482050LL;
unsigned int tf_0_var_614 = 1321771489U;
unsigned int tf_0_var_116 = 2438389883U;
long long int tf_0_var_682 = 2997174617692616057LL;
unsigned long long int tf_0_var_728 = 4431338120255382076ULL;
unsigned long long int tf_0_var_120 = 11272010769831539270ULL;
unsigned int tf_0_var_954 = 2906827848U;
void foo() {
if (-2783342978U * int(a43) || v64)
if (p9)
if (m33)
if (v36)
if (v12 & ~-(8 ? -2783342978U * int(a43) : 0)) {
m46 = a16 < a103;
tf_0_var_118 = a23 >> *p8 - 751359400;
*p10 = v146;
long a =
(a23 >> *p8 - 751359400 >>
~-(8 ? -2783342978U * int(a43) : 0) - 88480234) -
(808 ? 8 ? -2783342978U * int(a43) : 0 : 0)
? v176
: ~-(8 ? -2783342978U * int(a43) : 0) -
88480234;
tf_0_var_108 = a;
if (~0 % *p6 % 5)
tf_0_var_546 =
-3 * ((8 ? a43 : 0) - 4 ?: 407228174574);
if (v114 < (0 || ~0)) {
long long *b = &tf_0_var_142;
p10 = 0;
int c(*p9);
*p11 = 0;
tf_0_var_614 =
~(808 ? -(8 ? unsigned(-2783342978U * a43) : 0)
: 0);
a120 = *b & m30;
tf_0_var_116 = c;
} else {
m30 = 0;
int d, e(!0 % (a31 % *p6));
a50 =
((a92 || !m21) &&
a20) -
-(8 ? -2783342978U * int(a43) : d);
tf_0_var_682 = a23 >> *p8 - 751359400;
tf_0_var_142 = v12;
long f(a23 >> *p8 - 751359400 >>
~-(8 ? -2783342978U * int(a43) : 0) -
88480234);
tf_0_var_728 = v36;
a112 = a103 * f * e * v84;
}
if (8ULL *
-(808 ? -(8 ? -2783342978U * int(a43) : 0) : 0))
;
else {
*p10 = 0;
int g(3 & v44);
tf_0_var_120 = unsigned(~a23 + 9223372036854775807 >>
(8 ? a43 : 0));
*p12 = g + tf_0_var_142;
a113 =
m30 ||
~0 + 9223372036854775807 >>
~-(8 ? -2783342978U * int(a43) : 0);
tf_0_var_954 = a23 >> (8 ? 8 * a43 : 0);
a55 = *p8 ? -2783342978U * a43 : 0;
}
}
}
int main() {
foo();
__builtin_printf ("%d\n", a50);
return 0;
}
does reproduce it too, better test that.
>From gcc-bugs-return-583856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 12:57:20 2017
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From: "jyong at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/77277] -fdiagnostics-color=always disabled on _WIN32
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jyong at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |jyong at gcc dot gnu.org,
| |lh_mouse at 126 dot com
Resolution|--- |FIXED
--- Comment #4 from jyong at gcc dot gnu.org ---
Liu Hao has contributed to the text colorization for gcc on Windows, so I am
closing this entry as resolved.
>From gcc-bugs-return-583857-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 14:33:20 2017
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From: "arnd at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/83256] New: inconsistent _Pragma behavior in multi-line macros
Date: Sat, 02 Dec 2017 14:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83256
Bug ID: 83256
Summary: inconsistent _Pragma behavior in multi-line macros
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: arnd at linaro dot org
Target Milestone: ---
Created attachment 42777
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42777&action=edit
test case using _Pragma(GCC diagnostic push/pop)
I tried using _Pragma("GCC diagnostic push") and _Pragma("GCC diagnostic pop")
inside of a multi-line macro to turn a particular warning off inside code in
that macro. This worked in some cases but not others. From what I can tell, the
differences are:
- If I first preprocess the file with "gcc -E", and then compile the
preprocessed source, it works as expected.
- In case of the "-Wattribute-alias" warning (added in gcc-8), I get the
expected behavior only if I declare a structure before the _Pragma("GCC
diagnostic pop"); removing the 'struct s;' line from the attached example leads
to a warning for the incompatible alias.
- With the -Wuninitialized warning, I could find no way to disabled it just
inside of the macro expansion
The same thing seems to happen with multi-line statements that I join with '\'
line ends even without macros, but of course there is little use in that. I did
not try what happens with other. Support for _Pragma("GCC diagnostic ...") was
first added in gcc-4.2. This did not yet support push/pop, but the behavior of
multi-line macros was already the same as with gcc-8: preprocessing the file
makes it work as expected, but the integrated preprocessor seems to evaluate
the _Pragma() early.
>From gcc-bugs-return-583858-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 14:59:16 2017
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From: "bernd.edlinger at hotmail dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
Date: Sat, 02 Dec 2017 14:59:00 -0000
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Bernd Edlinger <bernd.edlinger at hotmail dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bernd.edlinger at hotmail dot de
--- Comment #20 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
this breaks glibc-2.26:
../sysdeps/unix/sysv/linux/if_index.c: In function '__if_nametoindex':
../sysdeps/unix/sysv/linux/if_index.c:46:3: error: 'strncpy' specified bound 16
equals destination size [-Werror=stringop-truncation]
strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[2]: *** [/home/ed/gnu/glibc-build/inet/if_index.o] Error 1
but in this case the code is correct:
struct ifreq ifr;
[...]
strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
if (__ioctl (fd, SIOCGIFINDEX, &ifr) < 0)
Because ifr_name does not need zero-termination.
And the following would not be correct, but does not warn:
strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name)-1);
>From gcc-bugs-return-583859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 19:36:39 2017
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From: "eggert at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83257] New: ICE with flexible array member and -fchkp-narrow-to-innermost-array
Date: Sat, 02 Dec 2017 19:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83257
Bug ID: 83257
Summary: ICE with flexible array member and
-fchkp-narrow-to-innermost-array
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: eggert at gnu dot org
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Created attachment 42778
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42778&action=edit
Source file illustrating compiler bug
I ran into this while trying to compile an experimental version of GNU Emacs
with GCC 7.2.1 20170915 (Red Hat 7.2.1-2) on Fedora 27 x86-64. To reproduce,
compile the attached program v.i with:
gcc -mmpx -fcheck-pointer-bounds -fchkp-narrow-to-innermost-array -S v.i
Output is:
v.i: In function ‘main.chkp’:
v.i:14:1: internal compiler error: Segmentation fault
}
^
Please submit a full bug report,
...
The problem appears to be the use of the flexible array member, in combination
with the -fchkp-narrow-to-innermost-array option.
>From gcc-bugs-return-583860-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 20:03:43 2017
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Subject: [Bug target/83245] [8 regression] several tests fail starting with r255258
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |segher at gcc dot gnu.org
--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Patch sent: https://gcc.gnu.org/ml/gcc-patches/2017-12/msg00097.html
>From gcc-bugs-return-583861-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 20:50:21 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
Date: Sat, 02 Dec 2017 20:50:00 -0000
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--- Comment #21 from Martin Sebor <msebor at gcc dot gnu.org> ---
I believe the bug you are pointing out was reported in
https://sourceware.org/bugzilla/show_bug.cgi?id=22442 and fixed in Glibc 2.27.
Please see the discussion at
https://sourceware.org/ml/libc-alpha/2017-11/msg00336.html for the background.
>From gcc-bugs-return-583862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 21:02:51 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83257] ICE with flexible array member and -fchkp-narrow-to-innermost-array
Date: Sat, 02 Dec 2017 21:02:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-02
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |5.4.0, 6.4.0, 7.2.0, 8.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The first commit to trigger the ICE is r217125, which is also the
commit that introduced the -mmpx, -fcheck-pointer-bounds, and
-fchkp-narrow-to-innermost-array options, so it doesn't look like a regression.
The full stack trace with recent topo of trunk (GCC 8.0) is below:
pr83257.c: In function ‘main.chkp’:
pr83257.c:14:1: internal compiler error: Segmentation fault
}
^
0xf6f521 crash_signal
/ssd/src/gcc/git/gcc/toplev.c:325
0xb87086 is_gimple_variable
/ssd/src/gcc/git/gcc/gimple-expr.h:83
0xb89ccb is_gimple_val(tree_node*)
/ssd/src/gcc/git/gcc/gimple-expr.c:783
0xbf1648 force_gimple_operand_1(tree_node*, gimple**, bool (*)(tree_node*),
tree_node*)
/ssd/src/gcc/git/gcc/gimplify-me.c:55
0xbf1872 force_gimple_operand(tree_node*, gimple**, bool, tree_node*)
/ssd/src/gcc/git/gcc/gimplify-me.c:98
0x107fd06 chkp_force_gimple_call_op
/ssd/src/gcc/git/gcc/tree-chkp.c:1382
0x108296e chkp_make_bounds
/ssd/src/gcc/git/gcc/tree-chkp.c:2093
0x1086e49 chkp_narrow_bounds_to_field
/ssd/src/gcc/git/gcc/tree-chkp.c:3407
0x1087429 chkp_parse_array_and_component_ref
/ssd/src/gcc/git/gcc/tree-chkp.c:3546
0x10890b2 chkp_process_stmt
/ssd/src/gcc/git/gcc/tree-chkp.c:4082
0x1089e8f chkp_instrument_function
/ssd/src/gcc/git/gcc/tree-chkp.c:4386
0x108aafa chkp_execute
/ssd/src/gcc/git/gcc/tree-chkp.c:4599
0x108ac52 execute
/ssd/src/gcc/git/gcc/tree-chkp.c:4658
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-583863-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 02 22:22:52 2017
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From: "barry.revzin at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83258] New: Rejecting function pointer non-type template parameter without linkage
Date: Sat, 02 Dec 2017 22:22:00 -0000
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Bug ID: 83258
Summary: Rejecting function pointer non-type template parameter
without linkage
Product: gcc
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Example from StackOverflow (https://stackoverflow.com/q/47606810/2069064):
template<void(*)()> struct A{};
int main()
{
constexpr auto fp = +[]{};
A<fp>{};
}
As of N4268, this should be accepted (linkage is no longer a requirement), but
gcc rejects with:
prog.cc: In function 'int main()':
prog.cc:6:9: error: 'main()::<lambda()>::_FUN' is not a valid template argument
for type 'void (*)()' because 'static constexpr void
main()::<lambda()>::_FUN()' has no linkage
A<fp>{};
^
>From gcc-bugs-return-583864-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 02:55:37 2017
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From: "bugdal at aerifal dot cx" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70216] [SH] Implement __builtin_trap
Date: Sun, 03 Dec 2017 02:55:00 -0000
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--- Comment #9 from Rich Felker <bugdal at aerifal dot cx> ---
>From a Linux standpoint, there is no trapa trap number defined that would cause
a fatal signal. The ones that are defined are for syscalls and debug
breakpoints. On the other hand, a permanently-undefined opcode would cause
SIGILL. So for Linux targets with aim of generating code that does what you
intend for it to do on both existing and future kernels, I think it makes much
more sense to use FFFD. This also aligns with the behavior of __builtin_trap()
on other targets, which is almost always to execute an instruction that causes
SIGILL (or, if unavailable, SIGSEGV).
I'm not opposed to supporting a -m option to choose a trapa trap instead,
and/or making something with trapa the default for freestanding/non-linux
targets.
FYI this issue is currently a regression that prevents building Linux with
gcc7, since gcc7 introduced an optimization that transforms x/0 to
__builtin_trap() rather than calling the libgcc div function.
>From gcc-bugs-return-583865-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 03:13:11 2017
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--- Comment #10 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Rich Felker from comment #9)
> From a Linux standpoint, there is no trapa trap number defined that would
> cause a fatal signal. The ones that are defined are for syscalls and debug
> breakpoints. On the other hand, a permanently-undefined opcode would cause
> SIGILL. So for Linux targets with aim of generating code that does what you
> intend for it to do on both existing and future kernels, I think it makes
> much more sense to use FFFD. This also aligns with the behavior of
> __builtin_trap() on other targets, which is almost always to execute an
> instruction that causes SIGILL (or, if unavailable, SIGSEGV).
>
> I'm not opposed to supporting a -m option to choose a trapa trap instead,
> and/or making something with trapa the default for freestanding/non-linux
> targets.
So my patch from Comment 6 could be extended to handle the option
-mbuiltin-trap=insn-FFFD
and define that as the default for linux configs.
Would that do the job?
> FYI this issue is currently a regression that prevents building Linux with
> gcc7, since gcc7 introduced an optimization that transforms x/0 to
> __builtin_trap() rather than calling the libgcc div function.
It's OK to add __builtin_trap to GCC 7.
Could you have a look and try the patch in Comment 6? I don't have so much
time for SH stuff these days...
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Subject: [Bug fortran/83225] [8.0 regression] runtime error in transfer.c
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--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Sun Dec 3 03:26:09 2017
New Revision: 255362
URL: https://gcc.gnu.org/viewcvs?rev=255362&root=gcc&view=rev
Log:
2017-12-02 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/83225
* io/io.h (is_internal_unit): Use the unit_is_internal bit.
* io/transfer.c (data_transfer_init): Set the bit to true for
internal umits. Use that bit for checks for internal unit
initializations.
* io/unit.c (insert_unit): As a precaution, set the
internal_unit_kind to zero when a unit structure is first created.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/io.h
trunk/libgfortran/io/transfer.c
trunk/libgfortran/io/unit.c
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Subject: [Bug fortran/83225] [8.0 regression] runtime error in transfer.c
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--- Comment #4 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Sun Dec 3 05:05:51 2017
New Revision: 255364
URL: https://gcc.gnu.org/viewcvs?rev=255364&root=gcc&view=rev
Log:
2017-12-02 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Backport from trunk
PR libgfortran/83225
* io/io.h (is_internal_unit): Use the unit_is_internal bit.
* io/transfer.c (data_transfer_init): Set the bit to true for
internal units. Use that bit for checks for internal unit
initializations.
* io/unit.c (insert_unit): As a precaution, set the
internal_unit_kind to zero when a unit structure is first created.
Modified:
branches/gcc-7-branch/libgfortran/ChangeLog
branches/gcc-7-branch/libgfortran/io/io.h
branches/gcc-7-branch/libgfortran/io/transfer.c
branches/gcc-7-branch/libgfortran/io/unit.c
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Subject: [Bug fortran/83225] [8.0 regression] runtime error in transfer.c
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--- Comment #5 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Fixed on trunk and 7. Will leave open for a short while in case any further
issues arise.
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Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
Date: Sun, 03 Dec 2017 08:47:00 -0000
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--- Comment #22 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Martin Sebor from comment #21)
> I believe the bug you are pointing out was reported in
> https://sourceware.org/bugzilla/show_bug.cgi?id=22442 and fixed in Glibc
> 2.27. Please see the discussion at
> https://sourceware.org/ml/libc-alpha/2017-11/msg00336.html for the
> background.
Ok, I see, thanks.
Maybe an info in this warning message pointing out the
other possibility (using __attribute__ ((__nonstring__)))
to resolve the other use case would be helpful ?
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83230] [8 regression] segmentation fault in bind C C/C++
Date: Sun, 03 Dec 2017 09:15:00 -0000
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--- Comment #6 from Jürgen Reuter <juergen.reuter at desy dot de> ---
So shall I commit this as an independent C/C++ bug?
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From: "dimhen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/83125] [8 regression] ICE in edge_badness, at ipa-inline.c:1025
Date: Sun, 03 Dec 2017 09:50:00 -0000
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--- Comment #3 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
in r255225 stack differ
during IPA pass: inline
x.ii:43:10: internal compiler error: in edge_badness, at ipa-inline.c:993
t::~t() {}
^
0x9c13cf edge_badness
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:992
0x18e7c09 update_edge_key
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1191
0x18e8148 update_caller_keys
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1313
0x18e808b update_caller_keys
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1302
0x18e9cae inline_small_functions
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:2013
0x18eab3f ipa_inline
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:2402
0x18eab3f execute
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:2809
Please submit a full bug report,
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Subject: [Bug tree-optimization/83262] New: SELECT CASE slower than IF/ELSE
Date: Sun, 03 Dec 2017 10:00:00 -0000
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Bug ID: 83262
Summary: SELECT CASE slower than IF/ELSE
Product: gcc
Version: unknown
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Priority: P3
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Created attachment 42781
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42781&action=edit
Test case with timings
The following test case by Tran Quoc Viet from comp.lang.fortran
run with the arguments
$ ./a.out 100000000 200000000 300000000
compiled with -O3 shows that the Fortran's select case statement
is slower by a factor of 1.33 vs. an if/else form.
Number of input arguments: 3
GOTO: n =100000000, ss =-0.1480800E+10, time = 0.347 (s)
SELECT CASE: n =100000000, ss =-0.1480800E+10, time = 0.199 (s)
IF-Goto: n =100000000, ss =-0.1480800E+10, time = 0.151 (s)
IF-noGoto: n =100000000, ss =-0.1480800E+10, time = 0.151 (s)
IF-ELSE: n =100000000, ss =-0.1480800E+10, time = 0.151 (s)
GOTO: n =200000000, ss =-0.2961600E+10, time = 0.702 (s)
SELECT CASE: n =200000000, ss =-0.2961600E+10, time = 0.401 (s)
IF-Goto: n =200000000, ss =-0.2961600E+10, time = 0.301 (s)
IF-noGoto: n =200000000, ss =-0.2961600E+10, time = 0.301 (s)
IF-ELSE: n =200000000, ss =-0.2961600E+10, time = 0.301 (s)
GOTO: n =300000000, ss =-0.4442400E+10, time = 1.054 (s)
SELECT CASE: n =300000000, ss =-0.4442400E+10, time = 0.602 (s)
IF-Goto: n =300000000, ss =-0.4442400E+10, time = 0.451 (s)
IF-noGoto: n =300000000, ss =-0.4442400E+10, time = 0.452 (s)
IF-ELSE: n =300000000, ss =-0.4442400E+10, time = 0.451 (s)
GOTO costs totally 2.103 (s)
SELECT CASE costs totally 1.202 (s)
IF-Goto costs totally 0.903 (s)
IF-noGoto costs totally 0.903 (s)
IF-ELSE costs totally 0.903 (s)
The Fortran FE translates the SELECT CASE into a switch.
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70216] [SH] Implement __builtin_trap
Date: Sun, 03 Dec 2017 10:31:00 -0000
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--- Comment #11 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Oleg Endo from comment #10)
> > FYI this issue is currently a regression that prevents building Linux with
> > gcc7, since gcc7 introduced an optimization that transforms x/0 to
> > __builtin_trap() rather than calling the libgcc div function.
>
> It's OK to add __builtin_trap to GCC 7.
> Could you have a look and try the patch in Comment 6? I don't have so much
> time for SH stuff these days...
I will test the patch.
Will it be enough to just add the patch, rebuild gcc-7 and then use this
version of gcc-7 to rebuild the kernel? Or do we need to pass extra options
during the kernel build?
>From gcc-bugs-return-583874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 10:36:13 2017
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Subject: [Bug target/70216] [SH] Implement __builtin_trap
Date: Sun, 03 Dec 2017 10:36:00 -0000
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--- Comment #12 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to John Paul Adrian Glaubitz from comment #11)
> >
> > It's OK to add __builtin_trap to GCC 7.
> > Could you have a look and try the patch in Comment 6? I don't have so much
> > time for SH stuff these days...
>
> I will test the patch.
>
> Will it be enough to just add the patch, rebuild gcc-7 and then use this
> version of gcc-7 to rebuild the kernel? Or do we need to pass extra options
> during the kernel build?
I don't think the patch will be immediately useful for a linux config. It will
require more work.
>From gcc-bugs-return-583875-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 10:40:14 2017
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Subject: [Bug target/70216] [SH] Implement __builtin_trap
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--- Comment #13 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Oleg Endo from comment #12)
> I don't think the patch will be immediately useful for a linux config. It
> will require more work.
What about glibc which originally resulted in this bug report?
>From gcc-bugs-return-583876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 10:45:37 2017
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Subject: [Bug target/70216] [SH] Implement __builtin_trap
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--- Comment #14 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to John Paul Adrian Glaubitz from comment #13)
>
> What about glibc which originally resulted in this bug report?
I have no idea about it.
>From gcc-bugs-return-583877-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 10:59:14 2017
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Subject: [Bug tree-optimization/83262] SELECT CASE slower than IF/ELSE
Date: Sun, 03 Dec 2017 10:59:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
What version of gcc, and what platform? With gcc-8 on x86_64 (skylake), I get
GOTO costs totally 0.904 (s)
SELECT CASE costs totally 0.704 (s)
IF-Goto costs totally 0.706 (s)
IF-noGoto costs totally 0.705 (s)
IF-ELSE costs totally 0.706 (s)
>From gcc-bugs-return-583878-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 11:02:17 2017
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Subject: [Bug target/70216] [SH] Implement __builtin_trap
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--- Comment #15 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Oleg Endo from comment #14)
> (In reply to John Paul Adrian Glaubitz from comment #13)
> >
> > What about glibc which originally resulted in this bug report?
>
> I have no idea about it.
I'll just give it a try then now.
>From gcc-bugs-return-583879-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 11:18:30 2017
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Subject: [Bug target/83252] Wrong code with "-march=skylake-avx512 -O3"
Date: Sun, 03 Dec 2017 11:18:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
With newer SDE bisected fix to r255258.
I'll commit the testcase and mark as fixed.
>From gcc-bugs-return-583880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 11:48:50 2017
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Subject: [Bug target/83252] Wrong code with "-march=skylake-avx512 -O3"
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started r249450, was likely latent before that.
Slightly adjusted testcase (needs C++ though, for some reason with C it doesn't
FAIL). The difference between r255257 and r255258 is:
--- pr83252.s.r255257 2017-12-03 06:47:40.000000000 -0500
+++ pr83252.s.r255258 2017-12-03 06:47:52.000000000 -0500
@@ -114,7 +114,8 @@ _Z3foov:
testl %ecx, %ecx
jne .L12
.L11:
- imull $1511624318, %esi, %eax
+ movl -28(%rsp), %eax
+ cmpq $1, t(%rip)
sbbl $-1, %eax
.L12:
movl -8(%rsp), %edx
// PR target/83252
// { dg-do run { target lp64 } }
// { dg-options "-O3" }
// { dg-additional-options "-mbmi2 -mtune=intel" { target bmi2 } }
long long int h = 8707493562598231894LL;
long long int i = 2720142332956971588LL;
long long int j = 5337614525613944604LL;
unsigned int k = 1092738485U;
long long int l = -2228108721620697360LL;
unsigned int m = 3060393125U;
long long int n = -5267148545474741934LL;
long long int o = 628644587444781171LL;
long long int p = -1929881923114969467LL;
unsigned int q = 342358347U;
unsigned int r = 4141428744U;
unsigned int s = 3147872734U;
long long int t = 2249711228974996732LL;
unsigned int u = 4012608111U;
unsigned int v = 664122423U;
unsigned int w = 795984700U;
unsigned int x = 751359462U;
unsigned int *y = &x;
unsigned int z = 274677517U;
unsigned long long int z1 = 14738459288714673932ULL;
unsigned int *z2 = &z;
unsigned int *z3 = &v;
unsigned long long int *z4 = &z1;
long long int z5;
unsigned int z6;
long long int *z7 = &z5;
unsigned int *z8 = &z6;
unsigned long long int z9 = 5759377091529791657ULL;
unsigned long long int x7 = 15085582420970487994ULL;
unsigned long long int y2 = 13537462614340337437ULL;
unsigned int y3 = 3159284560U;
long long int y4 = -5592336281551563373LL;
unsigned int y5 = 916868838U;
unsigned long long int y6 = 122846687590239390ULL;
unsigned long long int y7 = 15084731736992858763ULL;
unsigned int y8 = 1383085329U;
long long int y9 = 676559977929482050LL;
unsigned int x1 = 1321771489U;
unsigned int x2 = 2438389883U;
long long int x3 = 2997174617692616057LL;
unsigned long long int x4 = 4431338120255382076ULL;
unsigned long long int x5 = 11272010769831539270ULL;
unsigned int x6 = 2906827848U;
void
foo (void)
{
if ((-2783342978U * (int) l || z) && z2 && h && z1 && (z9 & ~-(8 ?
-2783342978U * (int) l : 0)))
{
i = m < n;
y7 = o >> *y - 751359400;
*z3 = x7;
long a = (o >> *y - 751359400 >> ~-(8 ? -2783342978U * (int) l : 0) -
88480234)
- (808 ? 8 ? -2783342978U * (int) l : 0 : 0) ? y2 : ~-(8 ?
-2783342978U * (int) l : 0) - 88480234;
y6 = a;
if (~0 % *z4 % 5)
y8 = -3 * ((8 ? l : 0) - 4 ? : 407228174574);
if (y3 < (0 || ~0))
{
long long *b = &y9;
z3 = 0;
int c = *z2;
*z7 = 0;
x1 = ~(808 ? -(8 ? (unsigned) (-2783342978U * l) : 0) : 0);
p = *b & j;
x2 = c;
}
else
{
j = 0;
int d, e = !0 % (q % *z4);
r = ((s || !k) && t) - -(8 ? -2783342978U * (int) l : d);
x3 = o >> *y - 751359400;
y9 = z9;
long f = o >> *y - 751359400 >> ~-(8 ? -2783342978U * (int) l : 0) -
88480234;
x4 = z1;
u = n * f * e * y4;
}
if (8ULL * -(808 ? -(8 ? -2783342978U * (int) l : 0) : 0))
;
else
{
*z3 = 0;
int g = 3 & y5;
x5 = (unsigned) (~o + 9223372036854775807 >> (8 ? l : 0));
*z8 = g + y9;
v = j || ~0 + 9223372036854775807 >> ~-(8 ? -2783342978U * (int) l :
0);
x6 = o >> (8 ? 8 * l : 0);
w = *y ? -2783342978U * l : 0;
}
}
}
int
main ()
{
foo ();
if (r != 88480289)
__builtin_abort ();
return 0;
}
>From gcc-bugs-return-583881-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 12:34:21 2017
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Subject: [Bug tree-optimization/83262] SELECT CASE slower than IF/ELSE
Date: Sun, 03 Dec 2017 12:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83262
--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
ig25@linux-d6cw:~> gfortran -v
Es werden eingebaute Spezifikationen verwendet.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/home/ig25/lib/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Ziel: x86_64-pc-linux-gnu
Konfiguriert mit: ../trunk/configure --prefix=/home/ig25
--enable-maintainer-mode --enable-languages=c,c++,fortran --disable-multilib
Thread-Modell: posix
gcc-Version 8.0.0 20171127 (experimental) (GCC)
ig25@linux-d6cw:~> cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Core(TM)2 Quad CPU Q8200 @ 2.33GHz
stepping : 7
microcode : 0x70a
cpu MHz : 1998.000
cache size : 2048 KB
Using PowerPC, I get
[tkoenig@gcc1-power7 ~]$ ./a.out 100000000 200000000 30000000
Number of input arguments: 3
GOTO: n =100000000, ss =-0.1480800E+10, time = 0.441 (s)
SELECT CASE: n =100000000, ss =-0.1480800E+10, time = 0.412 (s)
IF-Goto: n =100000000, ss =-0.1480800E+10, time = 0.318 (s)
IF-noGoto: n =100000000, ss =-0.1480800E+10, time = 0.176 (s)
IF-ELSE: n =100000000, ss =-0.1480800E+10, time = 1.358 (s)
GOTO: n =200000000, ss =-0.2961600E+10, time = 1.372 (s)
SELECT CASE: n =200000000, ss =-0.2961600E+10, time = 0.647 (s)
IF-Goto: n =200000000, ss =-0.2961600E+10, time = 0.382 (s)
IF-noGoto: n =200000000, ss =-0.2961600E+10, time = 0.338 (s)
IF-ELSE: n =200000000, ss =-0.2961600E+10, time = 0.392 (s)
GOTO: n = 30000000, ss =-0.4442400E+09, time = 0.108 (s)
SELECT CASE: n = 30000000, ss =-0.4442400E+09, time = 0.092 (s)
IF-Goto: n = 30000000, ss =-0.4442400E+09, time = 0.051 (s)
IF-noGoto: n = 30000000, ss =-0.4442400E+09, time = 0.051 (s)
IF-ELSE: n = 30000000, ss =-0.4442400E+09, time = 0.054 (s)
GOTO costs totally 1.920 (s)
SELECT CASE costs totally 1.151 (s)
IF-Goto costs totally 0.752 (s)
IF-noGoto costs totally 0.564 (s)
IF-ELSE costs totally 1.804 (s)
Total time: 6.191 (s)
with
[tkoenig@gcc1-power7 ~]$ gfortran -v
Es werden eingebaute Spezifikationen verwendet.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/home/tkoenig/libexec/gcc/powerpc64-unknown-linux-gnu/8.0.0/lto-wrapper
Ziel: powerpc64-unknown-linux-gnu
Konfiguriert mit: ../trunk/configure --prefix=/home/tkoenig
--enable-languages=fortran,c,c++ --disable-multilib --enable-maintainer-mode
Thread-Modell: posix
gcc-Version 8.0.0 20171108 (experimental) (GCC)
>From gcc-bugs-return-583882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 13:32:21 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83225] [8.0 regression] runtime error in transfer.c
Date: Sun, 03 Dec 2017 13:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83225
--- Comment #6 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Thanks for the very quick fix. This solves the problems in our code, and we
also don't see any new regressions. Fine from our side.
>From gcc-bugs-return-583883-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 14:10:38 2017
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Subject: [Bug tree-optimization/83262] SELECT CASE slower than IF/ELSE
Date: Sun, 03 Dec 2017 14:10:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-03
Ever confirmed|0 |1
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I suspect that the code is not testing what it is expected to test. IMO the
lines
key = mod(n,10) + 1
should be replaced with
key = mod(i,10) + 1
With the change I get
GOTO costs totally 3.377 (s)
SELECT CASE costs totally 4.455 (s)
IF-Goto costs totally 1.553 (s)
IF-noGoto costs totally 1.572 (s)
IF-ELSE costs totally 1.547 (s)
GCC 4.8.5 is significantly slower
GOTO costs totally 6.594 (s)
SELECT CASE costs totally 7.215 (s)
IF-Goto costs totally 4.512 (s)
IF-noGoto costs totally 4.601 (s)
IF-ELSE costs totally 4.581 (s)
>From gcc-bugs-return-583884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 14:12:36 2017
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/83263] New: [8.0 regression] segmentation fault in alloc_traits
Date: Sun, 03 Dec 2017 14:12:00 -0000
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Bug ID: 83263
Summary: [8.0 regression] segmentation fault in alloc_traits
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
Component: libstdc++
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Created attachment 42782
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42782&action=edit
reproducer
The following code is a simple XDR reader which produces the following
segmentation violations when run on a simple XDR file (attached). The latest
version which did not show the problems was r253161, the first where I observed
the issue r254916.
The reproducer tarball contains the header files, the C++ files, the Makefile
and the XDR example file stdhep_4_p.hep to be read in by the produced
executable.
This is the compilation chain:
g++ -c WOXDR.cpp
g++ -c WOStdHep.cpp
g++ -c WOStdHepRdr.cpp
g++ WOXDR.o WOStdHep.o WOStdHepRdr.o -ldl -lstdc++ -o stdhep_rd StdHepRdr.cpp
This is the backtrace:
Program received signal SIGSEGV, Segmentation fault.
__GI___libc_free (mem=0x6530302e30202c30) at malloc.c:2931
2931 malloc.c: No such file or directory.
(gdb) bt
#0 __GI___libc_free (mem=0x6530302e30202c30) at malloc.c:2931
#1 0x00007ffff7963c06 in deallocate (this=0x7fffffffda60, __p=<optimized out>)
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/ext/new_allocator.h:125
#2 deallocate (__a=..., __n=<optimized out>, __p=<optimized out>) at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/alloc_traits.h:462
#3 _M_destroy (__size=<optimized out>, this=0x7fffffffda60) at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:226
#4 _M_dispose (this=0x7fffffffda60) at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:221
#5 ~basic_string (this=0x7fffffffda60, __in_chrg=<optimized out>) at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:647
#6 ~basic_stringbuf (this=0x7fffffffda18, __in_chrg=<optimized out>) at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/sstream:65
#7 std::__cxx11::basic_stringstream<char, std::char_traits<char>,
std::allocator<char> >::~basic_stringstream (this=0x7fffffffda00,
__in_chrg=<optimized out>, __vtt_parm=<optimized out>)
at
/home/reuter/sandbox_gcc8/packages/gcc_trunk/_build/x86_64-pc-linux-gnu/libstdc++-v3/include/sstream:732
#8 0x0000000000407cb7 in WOUTIL::WOStdHepRdr::readEvent(std::ostream&, int) ()
#9 0x0000000000408854 in main ()
Originally I believed this to be a problem in the bind(C) implementation but
apparently it seemed to appear also for standalone C++ code. Here is the
Fortran bind(C) example:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83230
The expected output of the XDR reader is the following:
====================================================
WHIZARD StdHep Reader :
opened file : stdhep_4_p.hep
====== File Header ===========
total blocks: 847
version: 2.01
title: WHIZARD 2.6.2
comment: No comment
date: Sun Dec 3 13:52:19 2017
closing date: Sun Dec 3 13:52:19 2017
expected events: 3
events: 5
firstTable: -1
dimTable: 100
nNTuples: 0
nBlocks: 8
block names:
: Standard HEP COMMON block, see STDHEP Product
: Standard HEP COMMON block with multiple interaction, see
STDHEP Product
: Stdhep begin run record, see STDHEP Product
: Stdhep end run record, see STDHEP Product
: Standard HEP COMMON block with Les Houches, see STDHEP
Product
: Standard HEP COMMON block with Les Houches and multiple
interaction
: Les Houches HEPEUP common block
: Les Houches HEPRUP common block
=============================
Event #0
[ id ]index| PDG |q(el)| px, py, pz | energy |
mass |sta| vertex x, y , z | spin |
colorflow | [daughters]
[00000000] 0| 11|-1.00| 0.00e+00, 0.00e+00, 2.50e+02| 2.50e+02|
5.11e-04| 2 | 0.00e+00, 0.00e+00, 0.00e+00| 0.00e+00, 0.00e+00, 0.00e+00| (0,
0) | [ 2, 3 ]
[00000001] 1| -11| 1.00| 0.00e+00, 0.00e+00, -2.50e+02| 2.50e+02|
5.11e-04| 2 | 0.00e+00, 0.00e+00, 0.00e+00| 0.00e+00, 0.00e+00, 0.00e+00| (0,
0) | [ 2, 3 ]
[00000002] 2| 15|-1.00| 1.42e+02, 1.99e+02, -5.22e+01| 2.50e+02|
1.78e+00| 1 | 0.00e+00, 0.00e+00, 0.00e+00| 0.00e+00, 0.00e+00, 0.00e+00| (0,
0) | [ 0, 0 ]
[00000003] 3| -15| 1.00|-1.42e+02,-1.99e+02, 5.22e+01| 2.50e+02|
1.78e+00| 1 | 0.00e+00, 0.00e+00, 0.00e+00| 0.00e+00, 0.00e+00, 0.00e+00| (0,
0) | [ 0, 0 ]
converted 1 events - written to stdout
====================================================
>From gcc-bugs-return-583885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 15:18:52 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/81117] Improve buffer overflow checking in strncpy
Date: Sun, 03 Dec 2017 15:18:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=82945
--- Comment #23 from Martin Sebor <msebor at gcc dot gnu.org> ---
I agree that mentioning the attribute in the documentation of the
-Wstringop-truncation option would be helpful. Let me submit a patch with that
change.
I considered having GCC issue a note suggesting the attribute but decided that
using it was sufficiently rare and specialized that it would be a distraction
in most situations. Of the warnings the option found in GCC, GDB, and Glibc,
using the attribute was a solution in just three instances so far, all in
Glibc:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commit;h=7532837d7b03b3ca5b9a63d77a5bd81dd23f3d9c
Using attribute nonstring inappropriately could also lead to more warnings
because it triggers its own checks that aren't suitable for nul-terminated
strings -- see pr82945.
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Subject: [Bug fortran/83225] [8.0 regression] runtime error in transfer.c
Date: Sun, 03 Dec 2017 15:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83225
Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #6)
> Thanks for the very quick fix. This solves the problems in our code, and we
> also don't see any new regressions. Fine from our side.
Thanks for quick check, I will close this PR.
Cheers
>From gcc-bugs-return-583887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 16:43:29 2017
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Subject: [Bug tree-optimization/83262] SELECT CASE slower than IF/ELSE
Date: Sun, 03 Dec 2017 16:43:00 -0000
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The speed depends on the optimization level, SELECT CASE being the fastest with
-O1
-O0
GOTO costs totally 4.667 (s)
SELECT CASE costs totally 4.578 (s)
IF-Goto costs totally 4.986 (s)
IF-noGoto costs totally 5.734 (s)
IF-ELSE costs totally 5.731 (s)
-O1
GOTO costs totally 1.231 (s)
SELECT CASE costs totally 1.181 (s)
IF-Goto costs totally 1.826 (s)
IF-noGoto costs totally 1.738 (s)
IF-ELSE costs totally 1.668 (s)
-O2
GOTO costs totally 3.721 (s)
SELECT CASE costs totally 4.274 (s)
IF-Goto costs totally 1.517 (s)
IF-noGoto costs totally 1.482 (s)
IF-ELSE costs totally 1.525 (s)
-O3
GOTO costs totally 3.755 (s)
SELECT CASE costs totally 4.234 (s)
IF-Goto costs totally 1.497 (s)
IF-noGoto costs totally 1.522 (s)
IF-ELSE costs totally 1.537 (s)
-Ofast
GOTO costs totally 3.280 (s)
SELECT CASE costs totally 4.324 (s)
IF-Goto costs totally 1.526 (s)
IF-noGoto costs totally 1.534 (s)
IF-ELSE costs totally 1.513 (s)
>From gcc-bugs-return-583888-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 16:47:48 2017
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Subject: [Bug fortran/83191] [7/8 Regression] Writing a namelist with repeated complex numbers
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--- Comment #6 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Sun Dec 3 16:47:12 2017
New Revision: 255365
URL: https://gcc.gnu.org/viewcvs?rev=255365&root=gcc&view=rev
Log:
2017-12-03 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Dominique d'Humieres <dominiq@lps.ens.fr>
PR libgfortran/83191
* io/transfer.c (list_formatted_read_scalar): Do not set
namelist_mode bit here. (namelist_read): Likewise.
(data_transfer_init): Clear the mode bit here.
(finalize_transfer): Do set the mode bit just before any calls
to namelist_read or namelist_write. It can now be referred to
in complex_write.
^ io/write.c (write_complex): Suppress the leading blanks when
namelist_mode bit is not set to 1.
* gfortran.dg/namelist_95.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/namelist_95.f90
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/list_read.c
trunk/libgfortran/io/transfer.c
trunk/libgfortran/io/write.c
>From gcc-bugs-return-583889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 17:43:12 2017
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Subject: [Bug target/70216] [SH] Implement __builtin_trap
Date: Sun, 03 Dec 2017 17:43:00 -0000
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--- Comment #16 from Rich Felker <bugdal at aerifal dot cx> ---
The kernel build regression is just a gratuitous unresolved symbol; the code
path where is happens should not be reachable or the kernel would crash. So I
think the patch as-is is fine for fixing that issue. The need for an
instruction that generates SIGILL is just for ensuring that apps that reach
__builtin_trap() or equivalent actually trap rather than doing something
wrong/random.
I think -mbuiltin-trap=insn-FFFD and making it default for Linux (and possibly
other hosted targets? NetBSD?) would fully solve that problem.
>From gcc-bugs-return-583890-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 18:03:16 2017
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Subject: [Bug libstdc++/69331] FAIL: 20_util/shared_ptr/thread/default_weaktoshared.cc execution test
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--- Comment #19 from John David Anglin <danglin at gcc dot gnu.org> ---
On hppa64-hp-hpux11.11, the tests currently fail on gcc-8 trunk with a link
error:
spawn /test/gnu/gcc/objdir/./gcc/xg++ -shared-libgcc
-B/test/gnu/gcc/objdir/./gc
c -nostdinc++ -L/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/libstdc++-v3/src
-L/tes
t/gnu/gcc/objdir/hppa64-hp-hpux11.11/libstdc++-v3/src/.libs
-L/test/gnu/gcc/objd
ir/hppa64-hp-hpux11.11/libstdc++-v3/libsupc++/.libs
-B/opt/gnu64/gcc/gcc-8/hppa6
4-hp-hpux11.11/bin/ -B/opt/gnu64/gcc/gcc-8/hppa64-hp-hpux11.11/lib/ -isystem
/op
t/gnu64/gcc/gcc-8/hppa64-hp-hpux11.11/include -isystem
/opt/gnu64/gcc/gcc-8/hppa
64-hp-hpux11.11/sys-include
-B/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libstdc
++-v3/src/.libs -fmessage-length=0 -fno-show-column -ffunction-sections
-fdata-sections -g -O2 -DLOCALEDIR="." -nostdinc++
-I/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/libstdc++-v3/include/hppa64-hp-hpux11.11
-I/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/libstdc++-v3/include
-I/test/gnu/gcc/gcc/libstdc++-v3/libsupc++
-I/test/gnu/gcc/gcc/libstdc++-v3/include/backward
-I/test/gnu/gcc/gcc/libstdc++-v3/testsuite/util
/test/gnu/gcc/gcc/libstdc++-v3/testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc
-pthread -fno-diagnostics-show-caret -fdiagnostics-color=never ./libtestc++.a
-L/test/gnu/gcc/objdir/hppa64hp-hpux11.11/libstdc++-v3/src
/filesystem/.libs -lm -o ./default_weaktoshared.exeld: Unsatisfied symbol
"__atomic_fetch_add_4" in file /var/tmp//ccfRrRyB.old: Unsatisfied symbol
"__atomic_fetch_sub_4" in file /var/tmp//ccfRrRyB.o
We need to link with "-latomic".
>From gcc-bugs-return-583891-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 20:14:44 2017
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Subject: [Bug fortran/36313] [F03] {MIN,MAX}{LOC,VAL} should accept character arguments
Date: Sun, 03 Dec 2017 20:14:00 -0000
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--- Comment #14 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sun Dec 3 20:14:05 2017
New Revision: 255367
URL: https://gcc.gnu.org/viewcvs?rev=255367&root=gcc&view=rev
Log:
2017-12-03 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/36313
* check.c (gfc_check_minval_maxval): Use
int_orLreal_or_char_check_f2003 for array argument.
* iresolve.c (gfc_resolve_maxval): Insert number in
function name for character arguments.
(gfc_resolve_minval): Likewise.
* trans-intrinsic.c (gfc_conv_intrinsic_minmaxloc):
Fix comment.
(gfc_conv_intrinsic_minmaxval): Resort arguments and call library
function if dealing with a character function.
2017-12-03 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/36313
* Makefile.am: Add new files for character-valued
maxval and minval.
* Makefile.in: Regenerated.
* gfortran.map: Add new functions.
* m4/iforeach-s2.m4: New file.
* m4/ifunction-s2.m4: New file.
* m4/iparm.m4: Add intitval for minval and maxval.
* m4/maxval0s.m4: New file.
* m4/maxval1s.m4: New file.
* m4/minval0s.m4: New file.
* m4/minval1s.m4: New file.
* generated/maxval0_s1.c: New file.
* generated/maxval0_s4.c: New file.
* generated/maxval1_s1.c: New file.
* generated/maxval1_s4.c: New file.
* generated/minval0_s1.c: New file.
* generated/minval0_s4.c: New file.
* generated/minval1_s1.c: New file.
* generated/minval1_s4.c: New file.
2017-12-03 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/36313
* gfortran.dg/maxval_char_1.f90: New test.
* gfortran.dg/maxval_char_2.f90: New test.
* gfortran.dg/maxval_char_3.f90: New test.
* gfortran.dg/maxval_char_4.f90: New test.
* gfortran.dg/minval_char_1.f90: New test.
* gfortran.dg/minval_char_2.f90: New test.
* gfortran.dg/minval_char_3.f90: New test.
* gfortran.dg/minval_char_4.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/maxval_char_1.f90
trunk/gcc/testsuite/gfortran.dg/maxval_char_2.f90
trunk/gcc/testsuite/gfortran.dg/maxval_char_3.f90
trunk/gcc/testsuite/gfortran.dg/maxval_char_4.f90
trunk/gcc/testsuite/gfortran.dg/minval_char_1.f90
trunk/gcc/testsuite/gfortran.dg/minval_char_2.f90
trunk/gcc/testsuite/gfortran.dg/minval_char_3.f90
trunk/gcc/testsuite/gfortran.dg/minval_char_4.f90
trunk/libgfortran/generated/maxval0_s1.c
trunk/libgfortran/generated/maxval0_s4.c
trunk/libgfortran/generated/maxval1_s1.c
trunk/libgfortran/generated/maxval1_s4.c
trunk/libgfortran/generated/minval0_s1.c
trunk/libgfortran/generated/minval0_s4.c
trunk/libgfortran/generated/minval1_s1.c
trunk/libgfortran/generated/minval1_s4.c
trunk/libgfortran/m4/iforeach-s2.m4
trunk/libgfortran/m4/ifunction-s2.m4
trunk/libgfortran/m4/maxval0s.m4
trunk/libgfortran/m4/maxval1s.m4
trunk/libgfortran/m4/minval0s.m4
trunk/libgfortran/m4/minval1s.m4
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/check.c
trunk/gcc/fortran/iresolve.c
trunk/gcc/fortran/trans-intrinsic.c
trunk/gcc/testsuite/ChangeLog
trunk/libgfortran/ChangeLog
trunk/libgfortran/Makefile.am
trunk/libgfortran/Makefile.in
trunk/libgfortran/gfortran.map
trunk/libgfortran/m4/iparm.m4
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70216
--- Comment #17 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Rich Felker from comment #16)
> The kernel build regression is just a gratuitous unresolved symbol; the code
> path where is happens should not be reachable or the kernel would crash. So
> I think the patch as-is is fine for fixing that issue.
I'm testing the patch right now. Already rebuild gcc with the patch and I'm now
building the kernel with that gcc.
>From gcc-bugs-return-583893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 20:22:25 2017
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From: "rustamabd at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83264] New: std::initializer_list with a single element selects the wrong overload
Date: Sun, 03 Dec 2017 20:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83264
Bug ID: 83264
Summary: std::initializer_list with a single element selects
the wrong overload
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Consider the following:
#include <iostream>
#include <initializer_list>
using namespace std;
template<typename T>
struct A {
A(int) {
cout << "A(int)\n";
}
A(std::initializer_list<T>) {
cout << "A(initializer_list)\n";
}
};
struct UdfInt {
UdfInt(int) {}
};
int main() {
A<UdfInt> obj({ 10 });
return 0;
}
GCC (any version) prints "A(initializer_list)". Other compilers (clang, MSVC)
print "A(int)".
According to [dcl.init.list]/3.9, a single-element braced-init-list should be
unwrapped which means the A(int) overload is the best viable alternative since
the other one needs a user-defined conversion.
>From gcc-bugs-return-583894-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 20:42:26 2017
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Subject: [Bug bootstrap/83265] New: [8 Regression] Bootstrap failure on powerpc64
Date: Sun, 03 Dec 2017 20:42:00 -0000
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Bug ID: 83265
Summary: [8 Regression] Bootstrap failure on powerpc64
Product: gcc
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Configure with
../trunk/configure --prefix=$HOME --enable-languages=c,c++,fortran
--disable-multilib
leads to
/home/tkoenig/trunk-bin/./gcc/xgcc -B/home/tkoenig/trunk-bin/./gcc/ -xc
-nostdinc /dev/null -S -o /dev/null
-fself-test=../../trunk/gcc/testsuite/selftests
cc1: interner Compiler-Fehler: in rs6000_option_override_internal, bei
config/rs6000/rs6000.c:4187
0x1133b8e3 rs6000_option_override_internal
../../trunk/gcc/config/rs6000/rs6000.c:4187
0x1133fba7 rs6000_option_override
../../trunk/gcc/config/rs6000/rs6000.c:5300
0x10d91f3b process_options
../../trunk/gcc/toplev.c:1234
0x10d93cd7 do_compile
../../trunk/gcc/toplev.c:2015
for current trunk (as of a few hours ago).
This is for powerpc64-unknown-linux-gnu.
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Subject: [Bug fortran/83191] [7/8 Regression] Writing a namelist with repeated complex numbers
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--- Comment #7 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Sun Dec 3 20:43:59 2017
New Revision: 255368
URL: https://gcc.gnu.org/viewcvs?rev=255368&root=gcc&view=rev
Log:
2017-12-03 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Dominique d'Humieres <dominiq@lps.ens.fr>
Backport from trunk
PR libgfortran/83191
* io/transfer.c (list_formatted_read_scalar): Do not set
namelist_mode bit here. (namelist_read): Likewise.
(data_transfer_init): Clear the mode bit here.
(finalize_transfer): Do set the mode bit just before any calls
to namelist_read or namelist_write. It can now be referred to
in complex_write.
* io/write.c (write_complex): Suppress the leading blanks when
namelist_mode bit is not set to 1.
* gfortran.dg/namelist_95.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/namelist_95.f90
Modified:
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/libgfortran/ChangeLog
branches/gcc-7-branch/libgfortran/io/list_read.c
branches/gcc-7-branch/libgfortran/io/transfer.c
branches/gcc-7-branch/libgfortran/io/write.c
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Subject: [Bug bootstrap/83265] [8 Regression] Bootstrap failure on powerpc64
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
Target Milestone|--- |8.0
>From gcc-bugs-return-583896-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 20:47:01 2017
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Subject: [Bug fortran/83191] [7/8 Regression] Writing a namelist with repeated complex numbers
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Fixed on trunk and on 7. Closing
>From gcc-bugs-return-583898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 20:49:10 2017
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Subject: [Bug libfortran/83168] FAIL: gfortran.dg/fmt_f0_2.f90 with a sanitized libgfortran
Date: Sun, 03 Dec 2017 20:49:00 -0000
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--- Comment #7 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Should this be backported?
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Subject: [Bug bootstrap/83265] [8 Regression] Bootstrap failure on powerpc64
Date: Sun, 03 Dec 2017 21:25:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-12-03
Assignee|unassigned at gcc dot gnu.org |segher at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Mine.
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Subject: [Bug fortran/36313] [F03] {MIN,MAX}{LOC,VAL} should accept character arguments
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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--- Comment #16 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Really closing.
>From gcc-bugs-return-583902-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 21:39:37 2017
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Subject: [Bug fortran/20585] [meta-bug] Fortran 2003 support
Date: Sun, 03 Dec 2017 21:39:00 -0000
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Bug 20585 depends on bug 36313, which changed state.
Bug 36313 Summary: [F03] {MIN,MAX}{LOC,VAL} should accept character arguments
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36313
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/36313] [F03] {MIN,MAX}{LOC,VAL} should accept character arguments
Date: Sun, 03 Dec 2017 21:39:00 -0000
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--- Comment #15 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed on trunk, closing.
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Subject: [Bug libfortran/83168] FAIL: gfortran.dg/fmt_f0_2.f90 with a sanitized libgfortran
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--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Should this be backported?
No strong opinion, but it fixes a latent bug.
>From gcc-bugs-return-583904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 23:10:25 2017
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Subject: [Bug target/83252] Wrong code with "-march=skylake-avx512 -O3"
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--- Comment #5 from Dmitry Babokin <babokin at gmail dot com> ---
The original test case is also fixed. Thanks for investigation.
>From gcc-bugs-return-583905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 23:26:30 2017
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Subject: [Bug target/83252] Wrong code with "-march=skylake-avx512 -O3"
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--- Comment #6 from Dmitry Babokin <babokin at gmail dot com> ---
(In reply to Jakub Jelinek from comment #1)
> Option bisection is rarely useful for GCC, debugging issues with -Ox -fthat
> -fno-this -fwhatever is usually not beneficial over just -Ox or whatever
> minimal options you need it. Bisecting to what GCC version introduced the
> bug or changed behavior is usually much better.
Bisecting optimizations is orthogonal to bisecting of revision the bug started
with. In my experience it's extremely useful (with icc and clang) for
understanding the root cause of the bug (just compare two assemblers or IRs
with and without the guilty optimization). It's also very useful for
distinguishing bugs in automatic way - in case of multiple failing test cases I
can sort them in different buckets corresponding to guilty optmizations. This
analysis is not 100% accurate, but is very useful. And the third useful feature
of such bisection - finding an optimization for initial bug assignment.
I'm not insisting on such functionality, as my bugs were always analysed and
fixed in timely manner (unlike with other compilers). But I still think gcc
would benefit from such mechanism a lot.
>From gcc-bugs-return-583906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 23:37:55 2017
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70216] [SH] Implement __builtin_trap
Date: Sun, 03 Dec 2017 23:37:00 -0000
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--- Comment #18 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to John Paul Adrian Glaubitz from comment #17)
> I'm testing the patch right now. Already rebuild gcc with the patch and I'm
> now building the kernel with that gcc.
I can confirm that the patch from comment #6 resolves the problem for me.
Can we get it merged in one form or another?
I'll file a bug report against the gcc-7 package in Debian so the patch gets
added in Debian already.
>From gcc-bugs-return-583907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 03 23:46:58 2017
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Subject: [Bug fortran/83076] [8 Regression] ICE in gfc_deallocate_scalar_with_status, at fortran/trans.c:1598
Date: Sun, 03 Dec 2017 23:46:00 -0000
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
With the patch at https://gcc.gnu.org/ml/fortran/2017-11/msg00171.html the
number of
internal compiler error: in fold_convert_loc, at fold-const.c:2368
in my test suite went from 5 without the patch up to 54 with it and the number
of
internal compiler error: in gfc_add_modify_loc, at fortran/trans.c:159
from 2 to 29.
A prototype of the new errors of the first kind is the test in the first
attachment to pr64757 compiled with -fcoarray=lib.
A prototype for errors of the second kind is the test in pr58793 comment 0 also
compiled with -fcoarray=lib.
Yes, I know that these tests does not need -fcoarray=lib, but they should not
give an ICE with it.
I can provide a larger set of other tests ICEing if needed.
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Subject: [Bug tree-optimization/83262] SELECT CASE slower than IF/ELSE
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Compiling the test with '-O3 -fno-align-jumps' gives
GOTO costs totally 1.242 (s)
SELECT CASE costs totally 1.253 (s)
IF-Goto costs totally 1.507 (s)
IF-noGoto costs totally 1.518 (s)
IF-ELSE costs totally 1.514 (s)
comparable with the timing for '-O1' (comment 4).
>From gcc-bugs-return-583909-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 02:47:50 2017
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Subject: [Bug gcov-profile/83266] New: [GCOV] A True if statement is wrongly marked as not executed in gcov
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Bug ID: 83266
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$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 7.2.0-8ubuntu3'
--with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.2.0 (Ubuntu 7.2.0-8ubuntu3)
$ cat small.c
int main()
{
int i = 1;
if (i > 0) {
i++;
}
if (1 > 0) {
i++;
}
}
$ gcc -fprofile-arcs -ftes-coverage small.c; ./a.out; gcov small.c; cat
small.c.gcov
File 'small.c'
Lines executed:100.00% of 5
Creating 'small.c.gcov'
File '<built-in>'
No executable lines
Removing '<built-in>.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
1: 1:int main()
-: 2:{
1: 3: int i = 1;
1: 4: if (i > 0) {
1: 5: i++;
-: 6: }
-: 7:
-: 8: if (1 > 0) {
1: 9: i++;
-: 10: }
-: 11:}
As we can find that Line #4 is marked as executed and Line #8 is marked as not
executed.
>From gcc-bugs-return-583910-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 02:49:10 2017
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From: "yangyibiao at nju dot edu.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/83266] [GCOV] A True if statement is wrongly marked as not executed in gcov
Date: Mon, 04 Dec 2017 02:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83266
--- Comment #1 from Yibiao Yang <yangyibiao at nju dot edu.cn> ---
I am not very sure whether this is a bug or it is only the default behavior in
gcov.
(In reply to Yibiao Yang from comment #0)
> $ gcc -v
> Using built-in specs.
> COLLECT_GCC=gcc
> COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
> OFFLOAD_TARGET_NAMES=nvptx-none
> OFFLOAD_TARGET_DEFAULT=1
> Target: x86_64-linux-gnu
> Configured with: ../src/configure -v --with-pkgversion='Ubuntu
> 7.2.0-8ubuntu3' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
> --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
> --with-gcc-major-version-only --program-suffix=-7
> --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
> --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
> --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
> --enable-libstdcxx-debug --enable-libstdcxx-time=yes
> --with-default-libstdcxx-abi=new --enable-gnu-unique-object
> --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
> --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
> --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
> --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
> --enable-offload-targets=nvptx-none --without-cuda-driver
> --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
> --target=x86_64-linux-gnu
> Thread model: posix
> gcc version 7.2.0 (Ubuntu 7.2.0-8ubuntu3)
>
> $ cat small.c
> int main()
> {
> int i = 1;
> if (i > 0) {
> i++;
> }
>
> if (1 > 0) {
> i++;
> }
> }
>
> $ gcc -fprofile-arcs -ftes-coverage small.c; ./a.out; gcov small.c; cat
> small.c.gcov
> File 'small.c'
> Lines executed:100.00% of 5
> Creating 'small.c.gcov'
>
> File '<built-in>'
> No executable lines
> Removing '<built-in>.gcov'
>
> -: 0:Source:small.c
> -: 0:Graph:small.gcno
> -: 0:Data:small.gcda
> -: 0:Runs:1
> -: 0:Programs:1
> 1: 1:int main()
> -: 2:{
> 1: 3: int i = 1;
> 1: 4: if (i > 0) {
> 1: 5: i++;
> -: 6: }
> -: 7:
> -: 8: if (1 > 0) {
> 1: 9: i++;
> -: 10: }
> -: 11:}
>
> As we can find that Line #4 is marked as executed and Line #8 is marked as
> not executed.
>From gcc-bugs-return-583911-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 03:52:07 2017
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Subject: [Bug libfortran/83168] FAIL: gfortran.dg/fmt_f0_2.f90 with a sanitized libgfortran
Date: Mon, 04 Dec 2017 03:52:00 -0000
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--- Comment #9 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Mon Dec 4 03:51:28 2017
New Revision: 255373
URL: https://gcc.gnu.org/viewcvs?rev=255373&root=gcc&view=rev
Log:
2017-12-03 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Backport from trunk
PR libgfortran/83168
* io/write.c (select_string): Bump size by one to avoid
overrun.
Modified:
branches/gcc-7-branch/libgfortran/ChangeLog
branches/gcc-7-branch/libgfortran/io/write.c
>From gcc-bugs-return-583912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 03:53:21 2017
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Subject: [Bug libfortran/83168] FAIL: gfortran.dg/fmt_f0_2.f90 with a sanitized libgfortran
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Fixed on 7 and closing.
>From gcc-bugs-return-583913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 05:14:35 2017
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83262] SELECT CASE slower than IF/ELSE
Date: Mon, 04 Dec 2017 05:14:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #6 from kargl at gcc dot gnu.org ---
(In reply to Thomas Koenig from comment #0)
>
> GOTO costs totally 2.103 (s)
> SELECT CASE costs totally 1.202 (s)
> IF-Goto costs totally 0.903 (s)
> IF-noGoto costs totally 0.903 (s)
> IF-ELSE costs totally 0.903 (s)
>
> The Fortran FE translates the SELECT CASE into a switch.
Dick Henderson in clf claims that there is a bug in the code.
You're comparing apples and oranges. Mike Metcalf ran the
code with Dick's suggested change. There is no statistically
significant difference in timings.
>From gcc-bugs-return-583914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 05:18:37 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
Date: Mon, 04 Dec 2017 05:18:00 -0000
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--- Comment #5 from Andrew Roberts <andrewm.roberts at sky dot com> ---
It looks like I was right about this all along, its just that armv6l isn't
working. armv7l seems ok:
On RaspberryPi B - ARM1176 rev 7 (0x4100b760)
cat /proc/cpuinfo
processor : 0
model name : ARMv6-compatible processor rev 7 (v6l)
BogoMIPS : 697.95
Features : half thumb fastmult vfp edsp java tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xb76
CPU revision : 7
/usr/local/gcc/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-8.0.0/libexec/gcc/armv6l-unknown-linux-gnueabihf/8.0.0/lto-wrapper
Target: armv6l-unknown-linux-gnueabihf
Configured with: ../gcc-8.0.0/configure --prefix=/usr/local/gcc-8.0.0
--program-suffix= --disable-werror --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-gnu-indirect-function --enable-lto --with-isl
--enable-languages=c,c++,fortran,lto --disable-libgcj --enable-clocale=gnu
--disable-libstdcxx-pch --enable-install-libiberty --disable-multilib
--disable-libssp --enable-default-pie --enable-default-ssp
--host=armv6l-unknown-linux-gnueabihf --build=armv6l-unknown-linux-gnueabihf
--with-arch=armv6 --with-float=hard --with-fpu=vfp --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171126 (experimental) (GCC)
/usr/local/gcc/bin/gcc -march=native -mcpu=native -mtune=native -Q
--target-help | grep "march=\|mtune=\|mcpu=\|mfpu="
-march= armv6zk+fp
-mcpu= arm1176jz-s
-mfpu= vfp
-mtune= arm1176jz-s
/usr/local/gcc/bin/gcc -o matrix-v6 -march=native -mcpu=native -mtune=native
-mfpu=auto -O3 matrix.c
cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
whereas:
/usr/local/gcc/bin/gcc -o matrix-v6 -march=native -mcpu=native -mtune=native
-mfpu=vfp -O3 matrix.c
is fine.
-mfpu=auto works on
Raspberry Pi 3B - 4 x Cortex-A53 rev 4 (0x4100d030)
and
ODROID-XU4 - 4 x Cortex-A15 rev 3 (0x4100c0f0)/4 x Cortex-A7 rev 3 (0x4100c070)
On aarch64 -mfpu=auto gives:
gcc: error: unrecognized command line option ‘-mfpu=auto’
which is correct, but would it be better to silently accept it for
compatibility with ARM 32 bit
>From gcc-bugs-return-583916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 06:05:57 2017
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Subject: =?UTF-8?B?W0J1ZyBjKysvODMxNjBdIFs4IHJlZ3Jlc3Npb25dIGx2YWx1ZSByZXF1aXJl?= =?UTF-8?B?ZCBhcyB1bmFyeSDigJgm4oCZIG9wZXJhbmQ=?Date: Mon, 04 Dec 2017 06:05:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sylvestre at debian dot org
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
*** Bug 82751 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-583915-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 06:05:57 2017
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Subject: [Bug c++/82751] g++ 8 is breaking assert_lt (gtest) called from a lambda function
Date: Mon, 04 Dec 2017 06:05:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 83160 ***
>From gcc-bugs-return-583917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 06:07:18 2017
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Subject: =?UTF-8?B?W0J1ZyBjKysvODMxNjBdIFs4IHJlZ3Jlc3Npb25dIGx2YWx1ZSByZXF1aXJl?= =?UTF-8?B?ZCBhcyB1bmFyeSDigJgm4oCZIG9wZXJhbmQ=?Date: Mon, 04 Dec 2017 06:07:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2017-12-04
CC| |trippels at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 /tmp % cat foo.ii
template <typename T> void CmpHelperLT(T &);
void TestBody() {
const int a = 0;
[&a] { CmpHelperLT(a); };
}
markus@x4 /tmp % clang++ -w -c foo.ii
markus@x4 /tmp % icpc -c foo.ii
markus@x4 /tmp % g++ -c foo.ii
foo.ii: In lambda function:
foo.ii:4:23: error: lvalue required as unary ‘&’ operand
[&a] { CmpHelperLT(a); };
^
>From gcc-bugs-return-583918-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 06:41:35 2017
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From: "m.ostapenko at samsung dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/81697] Incorrect ASan global variables alignment on arm
Date: Mon, 04 Dec 2017 06:41:00 -0000
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--- Comment #5 from Maxim Ostapenko <m.ostapenko at samsung dot com> ---
Fixed on trunk.
>From gcc-bugs-return-583919-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 07:01:49 2017
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Subject: [Bug target/83252] Wrong code with "-march=skylake-avx512 -O3"
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |wrong-code
--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Dmitry Babokin from comment #6)
> I'm not insisting on such functionality, as my bugs were always analysed and
> fixed in timely manner (unlike with other compilers). But I still think gcc
> would benefit from such mechanism a lot.
The problem with GCC (and sometimes other compilers) is latent bugs in passes
after where the change happened. A lot of the time for GCC, this has been
true. Especially when we are talking about GCC's RTL passes; some of which
date from the mid to late 1990s (e.g. combine). And even some of the RTL
passes don't have an option flag to enable/disable (e.g. combine).
Also there are other things like disabling the late VRP or another pass which
uses the VRP data that was not updated which causes the bug to show up.
Just a few examples of why this functionality is not very useful in GCC and
also it gets abused by some users of it to workaround a bug in one specific
version of GCC rather than reporting the bug :).
>From gcc-bugs-return-583920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 08:16:44 2017
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Subject: [Bug ipa/83125] [8 regression] ICE in edge_badness, at ipa-inline.c:1025
Date: Mon, 04 Dec 2017 08:16:00 -0000
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--- Comment #4 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
one more test w/o -fpic and with less aggressive inlining
$ /usr/local/gcc_current/bin/g++ -Wall -Wextra -O2 --param
early-inlining-insns=18 --param max-early-inliner-iterations=10 -c
-fpreprocessed x.ii
during IPA pass: inline
x.ii:11:44: internal compiler error: in edge_badness, at ipa-inline.c:993
n::aw o::bd() { m c; return (n::aw)0; }
^
0x9c30ef edge_badness
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:992
0x18ee269 update_edge_key
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1191
0x18ee7a8 update_caller_keys
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1313
0x18ee6eb update_caller_keys
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:1302
0x18f030e inline_small_functions
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:2013
0x18f119f ipa_inline
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:2402
0x18f119f execute
/home/dimhen/src/gcc_current/gcc/ipa-inline.c:2809
Please submit a full bug report,
$ cat x.ii
template < typename b > struct d { void aa(b *e) { e->~b(); } };
template < typename b > struct g : d< b > { template < typename f > g(f); };
struct k { static void ae(g< int >, int); };
template < typename ac = g< int > > struct ah { ac aj(); void ak() {
aj().aa(0); k::ae(0, 0); } int *am; void an(int *); ~ah() { int
h; an(&h); } };
template < typename ac > void ah< ac >::an(int *e) { int *i; while (e) {
i = am; int *j = i; an(j); } int a; ak(); e = &a; }
struct l;
struct m { ah< g< l > > a; };
struct l { ah<> b; };
struct n { enum aw {}; };
struct o { n::aw bd(); };
n::aw o::bd() { m c; return (n::aw)0; }
$ /usr/local/gcc_current/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc_current/bin/g++
COLLECT_LTO_WRAPPER=/usr/local/gcc_current/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
Target: x86_64-pc-linux-gnu
Configured with: /home/dimhen/src/gcc_current/configure
--prefix=/usr/local/gcc_current --enable-checking=yes,df,fold,rtl,extra
--enable-languages=c,c++,lto --disable-multilib --enable-shared
--enable-threads=posix --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl
--enable-libmpx --enable-offload-targets=nvptx-none --without-cuda-driver
--enable-gnu-indirect-function --with-tune=native
Thread model: posix
gcc version 8.0.0 20171203 (experimental) [trunk revision 255364] (GCC)
>From gcc-bugs-return-583921-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 08:16:48 2017
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Subject: [Bug fortran/45689] [F03] Missing transformational intrinsic in the trans_func_f2003 list
Date: Mon, 04 Dec 2017 08:16:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Still to be done: Simplification for maxloc/minloc/maxval/minval
for character arguments.
Apart from that, I think we are done (but I will check before
closing :-)
>From gcc-bugs-return-583922-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 08:27:20 2017
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Subject: [Bug tree-optimization/83238] [8 Regression] [graphite] ICE in graphite_can_represent_scev, at graphite-scop-detection.c:971
Date: Mon, 04 Dec 2017 08:27:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Dec 4 08:26:18 2017
New Revision: 255375
URL: https://gcc.gnu.org/viewcvs?rev=255375&root=gcc&view=rev
Log:
2017-12-04 Richard Biener <rguenther@suse.de>
PR tree-optimization/83238
* graphite-scop-detection.c (scop_detection::merge_sese): Make
code match comment, rejecting invalid SESE regions.
* gcc.dg/graphite/pr83238.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/graphite/pr83238.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/graphite-scop-detection.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/47988] ICE: in reload_cse_simplify_operands, at postreload.c:403: insn does not satisfy its constraints
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-12-04
Blocks| |45689
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Are sure that the expected values after cshift are right?
Is the problem still present?
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45689
[Bug 45689] [F03] Missing transformational intrinsic in the trans_func_f2003
list
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Subject: [Bug gcov-profile/83266] [GCOV] A True if statement is wrongly marked as not executed in gcov
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--- Comment #2 from Yibiao Yang <yangyibiao at nju dot edu.cn> ---
>
> $ gcc -fprofile-arcs -ftes-coverage small.c; ./a.out; gcov small.c; cat
> small.c.gcov
The correct command should be:
$ gcc -fprofile-arcs -ftest-coverage small.c; ./a.out; gcov small.c; cat
small.c.gcov
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Subject: [Bug tree-optimization/83238] [8 Regression] [graphite] ICE in graphite_can_represent_scev, at graphite-scop-detection.c:971
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug fortran/45689] [F03] Missing transformational intrinsic in the trans_func_f2003 list
Date: Mon, 04 Dec 2017 09:20:00 -0000
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--- Comment #11 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Still to be done: Simplification for maxloc/minloc/maxval/minval
> for character arguments.
>
> Apart from that, I think we are done (but I will check before
> closing :-)
From https://gcc.gnu.org/ml/fortran/2015-11/msg00120.html I see
> The attached patch provides a partial implementation for
> the simplification for CSHIFT. It is partial in that it
> only applies to rank 1 arrays. For arrays with rank > 1,
> gfc_simplify_cshift will issue an error. Here, the intent
> is that hopefully someone that knows what they are doing
> with supply a patch for rank > 1.
Is it still true?
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Subject: [Bug target/43871] -mcpu=power4 -mtuneÎll emits power7/cell-only opcodes
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--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Mon Dec 4 09:19:27 2017
New Revision: 255376
URL: https://gcc.gnu.org/viewcvs?rev=255376&root=gcc&view=rev
Log:
PR bootstrap/83265
Revert
2017-12-01 Segher Boessenkool <segher@kernel.crashing.org>
PR target/43871
* config/rs6000/rs6000.c (rs6000_option_override_internal): Set
rs6000_cpu based on cpu_index, not tune_index.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
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Subject: [Bug bootstrap/83265] [8 Regression] Bootstrap failure on powerpc64
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Mon Dec 4 09:19:27 2017
New Revision: 255376
URL: https://gcc.gnu.org/viewcvs?rev=255376&root=gcc&view=rev
Log:
PR bootstrap/83265
Revert
2017-12-01 Segher Boessenkool <segher@kernel.crashing.org>
PR target/43871
* config/rs6000/rs6000.c (rs6000_option_override_internal): Set
rs6000_cpu based on cpu_index, not tune_index.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 5 is no longer maintained, if it is fixed in GCC 6 please use that.
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Subject: [Bug target/83245] [8 regression] several tests fail starting with r255258
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Should be fixed now.
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Subject: [Bug fortran/83076] [8 Regression] ICE in gfc_deallocate_scalar_with_status, at fortran/trans.c:1598
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83076
--- Comment #8 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #7)
> With the patch at https://gcc.gnu.org/ml/fortran/2017-11/msg00171.html the
> number of
>
> internal compiler error: in fold_convert_loc, at fold-const.c:2368
>
> in my test suite went from 5 without the patch up to 54 with it and the
> number of
>
> internal compiler error: in gfc_add_modify_loc, at fortran/trans.c:159
>
> from 2 to 29.
>
> A prototype of the new errors of the first kind is the test in the first
> attachment to pr64757 compiled with -fcoarray=lib.
>
> A prototype for errors of the second kind is the test in pr58793 comment 0
> also compiled with -fcoarray=lib.
>
> Yes, I know that these tests does not need -fcoarray=lib, but they should
> not give an ICE with it.
>
> I can provide a larger set of other tests ICEing if needed.
OK - thanks. I will look at it later on today.
Paul
>From gcc-bugs-return-583933-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 09:28:47 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83252] Wrong code with "-march=skylake-avx512 -O3"
Date: Mon, 04 Dec 2017 09:28:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #7)
> (In reply to Dmitry Babokin from comment #6)
> > I'm not insisting on such functionality, as my bugs were always analysed and
> > fixed in timely manner (unlike with other compilers). But I still think gcc
> > would benefit from such mechanism a lot.
>
> The problem with GCC (and sometimes other compilers) is latent bugs in
> passes after where the change happened. A lot of the time for GCC, this has
> been true. Especially when we are talking about GCC's RTL passes; some of
> which date from the mid to late 1990s (e.g. combine). And even some of the
> RTL passes don't have an option flag to enable/disable (e.g. combine).
>
> Also there are other things like disabling the late VRP or another pass
> which uses the VRP data that was not updated which causes the bug to show up.
>
> Just a few examples of why this functionality is not very useful in GCC and
> also it gets abused by some users of it to workaround a bug in one specific
> version of GCC rather than reporting the bug :).
I suppose one could try scripting something with -fdisable-{tree,rtl}-$dump
and seeding the list of passes to enable/disable with -fdump-{tree,rtl}-all.
Of course some -fdisable-* are "invalid" and will cause "interesting"
downstream
effects...
Sometimes I do this manually for cases where it isn't obvious who's doing sth
wrong...
>From gcc-bugs-return-583934-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 09:31:16 2017
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Subject: [Bug rtl-optimization/83245] [8 regression] several tests fail starting with r255258
Date: Mon, 04 Dec 2017 09:31:00 -0000
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Mon Dec 4 09:30:37 2017
New Revision: 255377
URL: https://gcc.gnu.org/viewcvs?rev=255377&root=gcc&view=rev
Log:
lra: Clobbers in a parallel are earlyclobbers (PR83245)
The documentation (rtl.texi) says:
When a @code{clobber} expression for a register appears inside a
@code{parallel} with other side effects, the register allocator
guarantees that the register is unoccupied both before and after that
insn if it is a hard register clobber.
and at least the rs6000 backend relies on that (see PR83245). This
patch restores that behaviour.
Registers that are also used as operands in the instruction are not
treated as earlyclobber, so such insns also still work (PR80818, an
s390 testcase).
PR rtl-optimization/83245
* lra.c (collect_non_operand_hard_regs): Treat clobbers of non-operand
hard registers as earlyclobber, also if not in an asm.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lra.c
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Subject: [Bug tree-optimization/83255] [8 Regression] [graphite] Wrong code w/ -O1 -floop-nest-optimize
Date: Mon, 04 Dec 2017 09:38:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.
>From gcc-bugs-return-583935-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 09:38:06 2017
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Subject: [Bug tree-optimization/83253] -ftree-slsr causes performance regression
Date: Mon, 04 Dec 2017 09:38:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
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CC| |amker at gcc dot gnu.org,
| |jakub at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org,
| |wschmidt at gcc dot gnu.org
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It looks more like a backend issue to me. I can reproduce it on x86_64 but
only with -march=nocona, not with generic or say, core-avx2.
Note that I think it is odd that SLSR ever does this replacement since
(on GIMPLE...) no instruction is saved.
I guess the expmed costing stuff doesn't consider the computations in
address context (though it must consider using lea on x86 for x + C*y?).
Eventually the IVO costing would be more accurate for address uses, but then
SLSR might want to create TARGET_MEM_REFs ...
>From gcc-bugs-return-583937-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 09:39:57 2017
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Subject: [Bug libstdc++/83263] [8 regression] segmentation fault in alloc_traits
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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|segmentation fault in |fault in alloc_traits
|alloc_traits |
>From gcc-bugs-return-583938-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 09:57:35 2017
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Subject: [Bug fortran/83230] [8 regression] segmentation fault in bind C C/C++
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This just looks like invalid testcase.
If you build with -fsanitize=unreachable, it will die on:
WOStdHepRdr.cpp:58:7: runtime error: execution reached the end of a
value-returning function without returning a value
which is something the compiler even warns about:
WOStdHepRdr.cpp:242:3: warning: control reaches end of non-void function
[-Wreturn-type]
At that point, anything can happen, including fallthrough into another function
etc.
Fixing that it passes.
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Subject: [Bug c/82728] [8 regression] Incorrect -Wunused-but-set-variable warning with a const
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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>From gcc-bugs-return-583941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:03:08 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83262] SELECT CASE slower than IF/ELSE
Date: Mon, 04 Dec 2017 10:03:00 -0000
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Dick Henderson in clf claims that there is a bug in the code.
> You're comparing apples and oranges. Mike Metcalf ran the
> code with Dick's suggested change.
All my timings after comment 3 are done with the change of 'n' to 'i'.
> There is no statistically significant difference in timings.
Well, my timings do not support that. Depending on the options
and the revisions I see significant differences. In particular
the option '-falign-jumps' is quite bad, at least on
x86_64-apple-darwin17.
>From gcc-bugs-return-583942-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:03:15 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83255] [8 Regression] [graphite] Wrong code w/ -O1 -floop-nest-optimize
Date: Mon, 04 Dec 2017 10:03:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ah, finally a testcase for a fix I have in my tree ;)
It would probably help if we'd emit the loop niters as SSA names instead of
creating weird constraints from them like
[sese-to-poly] adding one extra dimension to the domain for loop_1.
[sese-to-poly] adding constraint to the domain: [P_25] -> { [i1] : i1 >= 0 }
[sese-to-poly] adding constraint to the domain: [P_25] -> { [i1] :
4294967296*floor((-P_25)/4294967296) <= -P_25 - i1 }
Analyzing # of iterations of loop 1
exit condition [l4.8_25 + 1, + , 1](no_overflow) <= 0
bounds on difference of bases: -1 ... 2147483647
result:
# of iterations -(unsigned int) l4.8_25, bounded by 2147483648
...
[scheduler] original ast:
for (int c0 = 0; c0 <= -P_25; c0 += 1)
for (int c1 = 0; c1 <= 2; c1 += 1) {
for (int c2 = 0; c2 <= 2; c2 += 1)
S_5(c0, c1, c2);
S_25(c0, c1);
}
>From gcc-bugs-return-583943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:31:52 2017
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
Date: Mon, 04 Dec 2017 10:31:00 -0000
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--- Comment #6 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
> /usr/local/gcc/bin/gcc -o matrix-v6 -march=native -mcpu=native -mtune=native -mfpu=auto -O3 matrix.c
> cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
-mcpu=... is an alias that sets both architecture and tuning, you should never
need to specify all three.
What happens if you just use:
/usr/local/gcc/bin/gcc -o matrix-v6 -mcpu=native -mfpu=auto -O3 matrix.c
> On aarch64 -mfpu=auto gives:
> gcc: error: unrecognized command line option ‘-mfpu=auto’
The AArch64 compiler does not have a -mfpu option of any format, it's all part
of the architecture (-march) option.
I'll have another look at the native stuff, but I don't have an ARMv6 board to
test with and it might not be in the next few days.
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Subject: [Bug c++/82728] [8 regression] Incorrect -Wunused-but-set-variable warning with a const
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Started with r253266:
commit 4cedc476c94a41551d965bc57fbbe0186983c3c4
Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu Sep 28 19:39:45 2017 +0000
PR c++/56973, DR 696 - capture constant variables only as needed.
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Subject: [Bug c++/82799] [8 Regression] -Wunused-but-set-variable false positive
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Looks like a dup of PR82728.
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:45:00 -0000
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Bug 69582 depends on bug 56485, which changed state.
Bug 56485 Summary: [cilkplus] internal compiler error: in cdtor_comdat_group, at cp/optimize.c: 186
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56485
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Subject: [Bug c++/56485] [cilkplus] internal compiler error: in cdtor_comdat_group, at cp/optimize.c: 186
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:46:12 2017
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Subject: [Bug middle-end/57368] Trying to build CilkPlus fails with an ICE
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 57541, which changed state.
Bug 57541 Summary: [Cilkplus]: internal compiler error: in gimplify_expr, at gimplify.c:7809
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57541
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 58309, which changed state.
Bug 58309 Summary: spurious "parameter set but not used" warning in cilk plus array code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58309
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Subject: [Bug c/58309] spurious "parameter set but not used" warning in cilk plus array code
Date: Mon, 04 Dec 2017 10:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58309
Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:46:12 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 57368, which changed state.
Bug 57368 Summary: Trying to build CilkPlus fails with an ICE
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57368
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>From gcc-bugs-return-583950-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:46:29 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/57541] [Cilkplus]: internal compiler error: in gimplify_expr, at gimplify.c:7809
Date: Mon, 04 Dec 2017 10:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57541
Paolo Carlini <paolo.carlini at oracle dot com> changed:
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CC| |paolo.carlini at oracle dot com
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--- Comment #15 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:48:03 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 58949, which changed state.
Bug 58949 Summary: libcilkrts will not bootstrap on x86_64 without libstdc++.i686 32 bit libraries installed
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58949
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----------------------------------------------------------------------------
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Subject: [Bug bootstrap/58949] libcilkrts will not bootstrap on x86_64 without libstdc++.i686 32 bit libraries installed
Date: Mon, 04 Dec 2017 10:48:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583956-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:48:41 2017
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Subject: [Bug other/59490] cilk-plus failure
Date: Mon, 04 Dec 2017 10:48:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #9 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:48:41 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:48:00 -0000
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Bug 69582 depends on bug 59490, which changed state.
Bug 59490 Summary: cilk-plus failure
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59490
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 59540, which changed state.
Bug 59540 Summary: ICE while building libcilkrt library with --disable-bootstrap and --disable-checking
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59540
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WONTFIX
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Subject: [Bug bootstrap/59902] Cilk gcc bootstrap for arm target on x86 host
Date: Mon, 04 Dec 2017 10:49:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
Status|SUSPENDED |RESOLVED
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 59902, which changed state.
Bug 59902 Summary: Cilk gcc bootstrap for arm target on x86 host
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59902
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Subject: [Bug c++/59540] ICE while building libcilkrt library with --disable-bootstrap and --disable-checking
Date: Mon, 04 Dec 2017 10:49:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583962-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:50:58 2017
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From: "andrewm.roberts at sky dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
Date: Mon, 04 Dec 2017 10:50:00 -0000
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--- Comment #7 from Andrew Roberts <andrewm.roberts at sky dot com> ---
I get the same thing if I just use -mcpu=native:
/usr/local/gcc/bin/gcc -o matrix-v6 -mcpu=native -mfpu=auto -O3 matrix.c
cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
I realize the aarch64 compiler does not need -mfpu=auto, but I was wondering if
it was worth at least not rejecting it so makefiles can be portable between arm
and aarch64. At present you get:
gcc: error: unrecognized command line option ‘-mfpu=auto’
and the compile fails
A Rasbperry PI Zero is the cheapest and easiest armv6 option, although it does
take 24hrs to build the compiler
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Subject: [Bug c/59984] OpenMP pragma makes loop incorrect
Date: Mon, 04 Dec 2017 10:51:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|OpenMP and Cilk Plus SIMD |OpenMP pragma makes loop
|pragma makes loop incorrect |incorrect
--- Comment #17 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
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Subject: [Bug other/69582] [meta-bug] Cilk+
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Bug 69582 depends on bug 59053, which changed state.
Bug 59053 Summary: cilkplus branch compiler loops
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59053
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----------------------------------------------------------------------------
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>From gcc-bugs-return-583964-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:52:43 2017
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Subject: [Bug other/59053] cilkplus branch compiler loops
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #8 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583966-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:53:30 2017
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Subject: [Bug other/59384] Cilk Plus array notation with for loop after segfaults
Date: Mon, 04 Dec 2017 10:53:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
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Subject: [Bug other/69582] [meta-bug] Cilk+
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 59384, which changed state.
Bug 59384 Summary: Cilk Plus array notation with for loop after segfaults
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59384
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 60547, which changed state.
Bug 60547 Summary: libcilkrts/runtime/record-replay.cpp: 2 * possible problems in calls to scanf ?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60547
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Subject: [Bug other/69582] [meta-bug] Cilk+
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Bug 69582 depends on bug 61218, which changed state.
Bug 61218 Summary: lto ICE building libcilkrts with 4.9.0
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61218
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Subject: [Bug other/69582] [meta-bug] Cilk+
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 60198, which changed state.
Bug 60198 Summary: ICE with _Cilk_spawn in expression within template function
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60198
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>From gcc-bugs-return-583972-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:54:50 2017
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Subject: [Bug lto/61218] lto ICE building libcilkrts with 4.9.0
Date: Mon, 04 Dec 2017 10:54:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583968-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:54:08 2017
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Subject: [Bug c++/60198] ICE with _Cilk_spawn in expression within template function
Date: Mon, 04 Dec 2017 10:54:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #8 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583970-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:54:24 2017
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Subject: [Bug other/60547] libcilkrts/runtime/record-replay.cpp: 2 * possible problems in calls to scanf ?
Date: Mon, 04 Dec 2017 10:54:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583976-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:55:37 2017
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Subject: [Bug libgcc/61309] cilk-plus tests fail with: hidden symbol `__cpu_model' in /x/gcc/testsuite/g++/../../libgcc.a(cpuinfo.o) is referenced by DSO
Date: Mon, 04 Dec 2017 10:55:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583974-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:55:14 2017
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Subject: [Bug target/61956] problem linking cilk on RHEL4
Date: Mon, 04 Dec 2017 10:55:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583977-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:55:38 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:55:00 -0000
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Bug 69582 depends on bug 61309, which changed state.
Bug 61309 Summary: cilk-plus tests fail with: hidden symbol `__cpu_model' in /x/gcc/testsuite/g++/../../libgcc.a(cpuinfo.o) is referenced by DSO
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61309
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----------------------------------------------------------------------------
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>From gcc-bugs-return-583975-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:55:14 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 61956, which changed state.
Bug 61956 Summary: problem linking cilk on RHEL4
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61956
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Subject: [Bug c/63336] cilkplus array notation ICE in find_rank
Date: Mon, 04 Dec 2017 10:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63336
Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #11 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583979-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:56:36 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 63142, which changed state.
Bug 63142 Summary: gcc-cilk can not spawn a function template
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63142
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>From gcc-bugs-return-583978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:56:32 2017
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Subject: [Bug c++/63142] gcc-cilk can not spawn a function template
Date: Mon, 04 Dec 2017 10:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63142
Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583981-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:57:12 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 63291, which changed state.
Bug 63291 Summary: ASan reports stack-buffer-overflow in some cilkplus tests.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63291
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>From gcc-bugs-return-583983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:57:30 2017
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Subject: [Bug c++/63147] Cilk Plus in GCC 4.9 is missing metadata support
Date: Mon, 04 Dec 2017 10:57:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583984-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:57:30 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 63147, which changed state.
Bug 63147 Summary: Cilk Plus in GCC 4.9 is missing metadata support
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63147
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>From gcc-bugs-return-583982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:57:13 2017
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Subject: [Bug testsuite/63291] ASan reports stack-buffer-overflow in some cilkplus tests.
Date: Mon, 04 Dec 2017 10:57:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:58:24 2017
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Subject: [Bug target/68945] enable libcilkrts on SPARC
Date: Mon, 04 Dec 2017 10:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68945
Bug 68945 depends on bug 70595, which changed state.
Bug 70595 Summary: Cilk Plus testsuite needs massive cleanup
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70595
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>From gcc-bugs-return-583991-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:58:42 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 70789, which changed state.
Bug 70789 Summary: cilk test fib-tplt.cc occasionally fails
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70789
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:58:00 -0000
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Bug 69582 depends on bug 63398, which changed state.
Bug 63398 Summary: Cilk errors out incorrectly for spawn inside statement expressions
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63398
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Subject: [Bug c++/70789] cilk test fib-tplt.cc occasionally fails
Date: Mon, 04 Dec 2017 10:58:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583985-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:58:02 2017
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Subject: [Bug c/63398] Cilk errors out incorrectly for spawn inside statement expressions
Date: Mon, 04 Dec 2017 10:58:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583988-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:58:23 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:58:00 -0000
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Bug 69582 depends on bug 70595, which changed state.
Bug 70595 Summary: Cilk Plus testsuite needs massive cleanup
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70595
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>From gcc-bugs-return-583987-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:58:23 2017
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Subject: [Bug testsuite/70595] Cilk Plus testsuite needs massive cleanup
Date: Mon, 04 Dec 2017 10:58:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583995-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:59:49 2017
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Subject: [Bug middle-end/71473] [6/7/8 Regression] cilkplus sum reducer ICE
Date: Mon, 04 Dec 2017 10:59:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #11 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:59:01 2017
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Subject: [Bug other/71928] installed libcilkrts.so has RPATH
Date: Mon, 04 Dec 2017 10:59:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583994-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:59:26 2017
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Subject: [Bug target/81732] 'Error: Architecture mismatch on "rd".' in libcilkrts when compiling for sparc-linux-gnu
Date: Mon, 04 Dec 2017 10:59:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583996-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:59:49 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
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Bug 69582 depends on bug 71473, which changed state.
Bug 71473 Summary: [6/7/8 Regression] cilkplus sum reducer ICE
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71473
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>From gcc-bugs-return-583993-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 10:59:01 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 10:59:00 -0000
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Bug 69582 depends on bug 71928, which changed state.
Bug 71928 Summary: installed libcilkrts.so has RPATH
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71928
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Subject: [Bug other/71326] libcilkrts/runtime/sslib/snprintf_support.c:87]: (style) Redundant condition
Date: Mon, 04 Dec 2017 11:00:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-583998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:01:00 2017
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Subject: [Bug other/64184] libcilkrts fails to build on darwin due to error: '_SC_NPROCESSORS_ONLN' undeclared
Date: Mon, 04 Dec 2017 11:01:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584003-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:01:53 2017
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Subject: [Bug c++/69017] [cilkplus] ICE with valid cilk_spawn assignment
Date: Mon, 04 Dec 2017 11:01:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584002-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:01:40 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 11:01:00 -0000
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Bug 69582 depends on bug 69021, which changed state.
Bug 69021 Summary: [cilkplus] valid cilk_spawn won't compile when invoking non-trivial assignment operator
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69021
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 11:01:00 -0000
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Bug 69582 depends on bug 69017, which changed state.
Bug 69017 Summary: [cilkplus] ICE with valid cilk_spawn assignment
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69017
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Subject: [Bug c++/69021] [cilkplus] valid cilk_spawn won't compile when invoking non-trivial assignment operator
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584000-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:01:31 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 11:01:00 -0000
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Bug 69582 depends on bug 69503, which changed state.
Bug 69503 Summary: SIGFPE raised when mixing std::async with cilk
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69503
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Subject: [Bug target/69503] SIGFPE raised when mixing std::async with cilk
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584005-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:02:09 2017
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Subject: [Bug c++/68581] ICE in build_conditional_expr_1 upon instantiation of a templated function with Cilk+ directives (valid code)
Date: Mon, 04 Dec 2017 11:02:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584009-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:02:46 2017
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Subject: [Bug c++/67149] false positive maybe-uninitialized in the presence of cilk spawn
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584007-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:02:31 2017
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Subject: [Bug target/67424] libcilkcrts fails to build on NetBSD
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584006-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:02:10 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 11:02:00 -0000
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Bug 69582 depends on bug 68581, which changed state.
Bug 68581 Summary: ICE in build_conditional_expr_1 upon instantiation of a templated function with Cilk+ directives (valid code)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68581
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>From gcc-bugs-return-584008-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:02:38 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
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Bug 69582 depends on bug 67424, which changed state.
Bug 67424 Summary: libcilkcrts fails to build on NetBSD
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67424
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>From gcc-bugs-return-584010-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:02:47 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
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Bug 69582 depends on bug 67149, which changed state.
Bug 67149 Summary: false positive maybe-uninitialized in the presence of cilk spawn
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67149
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>From gcc-bugs-return-584013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:03:17 2017
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Subject: [Bug c/65653] cilkplus reducer ICE
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584012-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:03:02 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 11:03:00 -0000
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Bug 69582 depends on bug 66286, which changed state.
Bug 66286 Summary: Inconsistent handling of Cilk+ array sections
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66286
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>From gcc-bugs-return-584014-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:03:37 2017
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Subject: [Bug c++/64318] Using _Cilk_for with <random> cause strange floating point exception
Date: Mon, 04 Dec 2017 11:03:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:03:02 2017
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Subject: [Bug c/66286] Inconsistent handling of Cilk+ array sections
Date: Mon, 04 Dec 2017 11:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66286
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WONTFIX
--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584022-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:04:52 2017
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Subject: [Bug c++/70565] [6 Regression] ICE at gimplify.c:8832 (cilkplus array extension)
Date: Mon, 04 Dec 2017 11:04:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WONTFIX
--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:04:24 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 11:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 70506, which changed state.
Bug 70506 Summary: [CilkPlus] error: location references block not in block tree
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70506
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |WONTFIX
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Subject: [Bug other/71929] libcilkrts build failure because broken __cilkrts_yield and __cilkrts_idle
Date: Mon, 04 Dec 2017 11:04:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |WONTFIX
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584016-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:04:16 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82941] Missing vzeroupper with -march=skylake-avx512 -O2
Date: Mon, 04 Dec 2017 11:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82941
--- Comment #3 from speryt at gcc dot gnu.org ---
Author: speryt
Date: Mon Dec 4 11:03:37 2017
New Revision: 255378
URL: https://gcc.gnu.org/viewcvs?rev=255378&root=gcc&view=rev
Log:
Fix PR82941 and PR82942 by adding proper vzeroupper generation on SKX.
Add X86_TUNE_EMIT_VZEROUPPER to indicate if vzeroupper instruction should
be inserted before a transfer of control flow out of the function. It is
turned on by default unless we are tuning for KNL. Users can always use
-mzeroupper or -mno-zeroupper to override X86_TUNE_EMIT_VZEROUPPER.
2017-12-04 Sebastian Peryt <sebastian.peryt@intel.com>
H.J. Lu <hongjiu.lu@intel.com>
gcc/
Bakcported from trunk
PR target/82941
PR target/82942
PR target/82990
* config/i386/i386.c (pass_insert_vzeroupper): Remove
TARGET_AVX512F check from gate condition.
(ix86_check_avx256_register): Changed to ...
(ix86_check_avx_upper_register): ... this. Add extra check for
VALID_AVX512F_REG_OR_XI_MODE.
(ix86_avx_u128_mode_needed): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_check_avx256_stores): Changed to ...
(ix86_check_avx_upper_stores): ... this. Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_after): Changed
avx_reg256_found to avx_upper_reg_found. Changed
ix86_check_avx256_stores to ix86_check_avx_upper_stores.
(ix86_avx_u128_mode_entry): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_exit): Ditto.
(ix86_option_override_internal): Set MASK_VZEROUPPER if
neither -mzeroupper nor -mno-zeroupper is used and
TARGET_EMIT_VZEROUPPER is set.
* config/i386/i386.h: (host_detect_local_cpu): New define.
(TARGET_EMIT_VZEROUPPER): New.
* config/i386/x86-tune.def: Add X86_TUNE_EMIT_VZEROUPPER.
2017-12-04 Sebastian Peryt <sebastian.peryt@intel.com>
H.J. Lu <hongjiu.lu@intel.com>
gcc/testsuite/
Backported from trunk
PR target/82941
PR target/82942
PR target/82990
* gcc.target/i386/pr82941-1.c: New test.
* gcc.target/i386/pr82941-2.c: Likewise.
* gcc.target/i386/pr82942-1.c: Likewise.
* gcc.target/i386/pr82942-2.c: Likewise.
* gcc.target/i386/pr82990-1.c: Likewise.
* gcc.target/i386/pr82990-2.c: Likewise.
* gcc.target/i386/pr82990-3.c: Likewise.
* gcc.target/i386/pr82990-4.c: Likewise.
* gcc.target/i386/pr82990-5.c: Likewise.
* gcc.target/i386/pr82990-6.c: Likewise.
* gcc.target/i386/pr82990-7.c: Likewise.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82941-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82941-2.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82942-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82942-2.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-2.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-3.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-4.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-5.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-6.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-7.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/i386/i386.c
branches/gcc-7-branch/gcc/config/i386/i386.h
branches/gcc-7-branch/gcc/config/i386/x86-tune.def
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70506] [CilkPlus] error: location references block not in block tree
Date: Mon, 04 Dec 2017 11:04:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584015-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:04:15 2017
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From: "speryt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82942] Generate vzeroupper with -mavx512f -mno-avx512er -O2
Date: Mon, 04 Dec 2017 11:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82942
--- Comment #8 from speryt at gcc dot gnu.org ---
Author: speryt
Date: Mon Dec 4 11:03:37 2017
New Revision: 255378
URL: https://gcc.gnu.org/viewcvs?rev=255378&root=gcc&view=rev
Log:
Fix PR82941 and PR82942 by adding proper vzeroupper generation on SKX.
Add X86_TUNE_EMIT_VZEROUPPER to indicate if vzeroupper instruction should
be inserted before a transfer of control flow out of the function. It is
turned on by default unless we are tuning for KNL. Users can always use
-mzeroupper or -mno-zeroupper to override X86_TUNE_EMIT_VZEROUPPER.
2017-12-04 Sebastian Peryt <sebastian.peryt@intel.com>
H.J. Lu <hongjiu.lu@intel.com>
gcc/
Bakcported from trunk
PR target/82941
PR target/82942
PR target/82990
* config/i386/i386.c (pass_insert_vzeroupper): Remove
TARGET_AVX512F check from gate condition.
(ix86_check_avx256_register): Changed to ...
(ix86_check_avx_upper_register): ... this. Add extra check for
VALID_AVX512F_REG_OR_XI_MODE.
(ix86_avx_u128_mode_needed): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_check_avx256_stores): Changed to ...
(ix86_check_avx_upper_stores): ... this. Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_after): Changed
avx_reg256_found to avx_upper_reg_found. Changed
ix86_check_avx256_stores to ix86_check_avx_upper_stores.
(ix86_avx_u128_mode_entry): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_exit): Ditto.
(ix86_option_override_internal): Set MASK_VZEROUPPER if
neither -mzeroupper nor -mno-zeroupper is used and
TARGET_EMIT_VZEROUPPER is set.
* config/i386/i386.h: (host_detect_local_cpu): New define.
(TARGET_EMIT_VZEROUPPER): New.
* config/i386/x86-tune.def: Add X86_TUNE_EMIT_VZEROUPPER.
2017-12-04 Sebastian Peryt <sebastian.peryt@intel.com>
H.J. Lu <hongjiu.lu@intel.com>
gcc/testsuite/
Backported from trunk
PR target/82941
PR target/82942
PR target/82990
* gcc.target/i386/pr82941-1.c: New test.
* gcc.target/i386/pr82941-2.c: Likewise.
* gcc.target/i386/pr82942-1.c: Likewise.
* gcc.target/i386/pr82942-2.c: Likewise.
* gcc.target/i386/pr82990-1.c: Likewise.
* gcc.target/i386/pr82990-2.c: Likewise.
* gcc.target/i386/pr82990-3.c: Likewise.
* gcc.target/i386/pr82990-4.c: Likewise.
* gcc.target/i386/pr82990-5.c: Likewise.
* gcc.target/i386/pr82990-6.c: Likewise.
* gcc.target/i386/pr82990-7.c: Likewise.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82941-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82941-2.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82942-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82942-2.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-2.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-3.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-4.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-5.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-6.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-7.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/i386/i386.c
branches/gcc-7-branch/gcc/config/i386/i386.h
branches/gcc-7-branch/gcc/config/i386/x86-tune.def
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 11:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 71929, which changed state.
Bug 71929 Summary: libcilkrts build failure because broken __cilkrts_yield and __cilkrts_idle
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71929
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
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From: "speryt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82990] Update the default -mzeroupper setting
Date: Mon, 04 Dec 2017 11:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82990
--- Comment #9 from speryt at gcc dot gnu.org ---
Author: speryt
Date: Mon Dec 4 11:03:37 2017
New Revision: 255378
URL: https://gcc.gnu.org/viewcvs?rev=255378&root=gcc&view=rev
Log:
Fix PR82941 and PR82942 by adding proper vzeroupper generation on SKX.
Add X86_TUNE_EMIT_VZEROUPPER to indicate if vzeroupper instruction should
be inserted before a transfer of control flow out of the function. It is
turned on by default unless we are tuning for KNL. Users can always use
-mzeroupper or -mno-zeroupper to override X86_TUNE_EMIT_VZEROUPPER.
2017-12-04 Sebastian Peryt <sebastian.peryt@intel.com>
H.J. Lu <hongjiu.lu@intel.com>
gcc/
Bakcported from trunk
PR target/82941
PR target/82942
PR target/82990
* config/i386/i386.c (pass_insert_vzeroupper): Remove
TARGET_AVX512F check from gate condition.
(ix86_check_avx256_register): Changed to ...
(ix86_check_avx_upper_register): ... this. Add extra check for
VALID_AVX512F_REG_OR_XI_MODE.
(ix86_avx_u128_mode_needed): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_check_avx256_stores): Changed to ...
(ix86_check_avx_upper_stores): ... this. Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_after): Changed
avx_reg256_found to avx_upper_reg_found. Changed
ix86_check_avx256_stores to ix86_check_avx_upper_stores.
(ix86_avx_u128_mode_entry): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_exit): Ditto.
(ix86_option_override_internal): Set MASK_VZEROUPPER if
neither -mzeroupper nor -mno-zeroupper is used and
TARGET_EMIT_VZEROUPPER is set.
* config/i386/i386.h: (host_detect_local_cpu): New define.
(TARGET_EMIT_VZEROUPPER): New.
* config/i386/x86-tune.def: Add X86_TUNE_EMIT_VZEROUPPER.
2017-12-04 Sebastian Peryt <sebastian.peryt@intel.com>
H.J. Lu <hongjiu.lu@intel.com>
gcc/testsuite/
Backported from trunk
PR target/82941
PR target/82942
PR target/82990
* gcc.target/i386/pr82941-1.c: New test.
* gcc.target/i386/pr82941-2.c: Likewise.
* gcc.target/i386/pr82942-1.c: Likewise.
* gcc.target/i386/pr82942-2.c: Likewise.
* gcc.target/i386/pr82990-1.c: Likewise.
* gcc.target/i386/pr82990-2.c: Likewise.
* gcc.target/i386/pr82990-3.c: Likewise.
* gcc.target/i386/pr82990-4.c: Likewise.
* gcc.target/i386/pr82990-5.c: Likewise.
* gcc.target/i386/pr82990-6.c: Likewise.
* gcc.target/i386/pr82990-7.c: Likewise.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82941-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82941-2.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82942-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82942-2.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-2.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-3.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-4.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-5.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-6.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-7.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/i386/i386.c
branches/gcc-7-branch/gcc/config/i386/i386.h
branches/gcc-7-branch/gcc/config/i386/x86-tune.def
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-584023-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:04:52 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 11:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 70565, which changed state.
Bug 70565 Summary: [6 Regression] ICE at gimplify.c:8832 (cilkplus array extension)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70565
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WONTFIX
>From gcc-bugs-return-584025-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:05:23 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80038] [6/7 Regression] Random segfault using local vectors in Cilk function
Date: Mon, 04 Dec 2017 11:05:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WONTFIX
--- Comment #33 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584026-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:05:48 2017
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Subject: [Bug middle-end/81828] Cilkplus performance regression on ARM...
Date: Mon, 04 Dec 2017 11:05:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WONTFIX
--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 11:05:00 -0000
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Bug 69582 depends on bug 80038, which changed state.
Bug 80038 Summary: [6/7 Regression] Random segfault using local vectors in Cilk function
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80038
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WONTFIX
>From gcc-bugs-return-584028-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:06:31 2017
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Subject: [Bug c++/82728] [8 regression] Incorrect -Wunused-but-set-variable warning with a const
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Testcase from another PR for similar issue:
enum a { b };
struct c {
template < a > int d() {
const bool is_ident = 0;
const int ret = is_ident ? 7 : 9;
return ret;
}
void e() {
d < b > ();
}
};
>From gcc-bugs-return-584027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:06:21 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/81934] after install of 7.2.0 the libcilkrts.la has extra quote chars in it for dependency_libs
Date: Mon, 04 Dec 2017 11:06:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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Resolution|--- |WONTFIX
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584032-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:07:24 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 11:07:00 -0000
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Bug 69582 depends on bug 69362, which changed state.
Bug 69362 Summary: ICE when doing a pragma reduction with the wrong variable
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69362
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>From gcc-bugs-return-584030-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:07:14 2017
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Subject: [Bug c++/82728] [8 regression] Incorrect -Wunused-but-set-variable warning with a const
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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CC| |sgunderson at bigfoot dot com
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 82799 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-584031-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:07:24 2017
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Subject: [Bug c++/69362] ICE when doing a pragma reduction with the wrong variable
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584029-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:07:11 2017
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Subject: [Bug c++/82799] [8 Regression] -Wunused-but-set-variable false positive
Date: Mon, 04 Dec 2017 11:07:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Indeed, let's do it, but make sure we have both testcases in the testsuite
after the fix.
*** This bug has been marked as a duplicate of bug 82728 ***
>From gcc-bugs-return-584034-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:12:43 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Mon, 04 Dec 2017 11:12:00 -0000
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Bug 69582 depends on bug 62002, which changed state.
Bug 62002 Summary: -fcilkplus switch breaks format attribute.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62002
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>From gcc-bugs-return-584033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:12:43 2017
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Subject: [Bug other/62002] -fcilkplus switch breaks format attribute.
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #8 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:13:16 2017
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Subject: [Bug bootstrap/64271] Minimal patches to bootstrap on NetBSD
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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CC| |paolo.carlini at oracle dot com
--- Comment #11 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584036-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:15:03 2017
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Subject: [Bug other/69582] [meta-bug] Cilk+
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #8 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:18:44 2017
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Subject: [Bug fortran/83230] [8 regression] segmentation fault in bind C C/C++
Date: Mon, 04 Dec 2017 11:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83230
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 83263 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-584037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:18:44 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/83263] [8 regression] segmentation fault in alloc_traits
Date: Mon, 04 Dec 2017 11:18:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |jakub at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Invalid testcase.
*** This bug has been marked as a duplicate of bug 83230 ***
>From gcc-bugs-return-584039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:19:53 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/60269] #pragma simd tsubst related ICE
Date: Mon, 04 Dec 2017 11:19:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Cilk Plus, deprecated for 7.x, will not be in 8.x.
>From gcc-bugs-return-584040-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:25:36 2017
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83232] fma3d spec2000 regression on zen with -Ofast (generic tuning) after r255268 by missed SLP oppurtunity
Date: Mon, 04 Dec 2017 11:25:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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--- Comment #5 from Christophe Lyon <clyon at gcc dot gnu.org> ---
I've noticed that this fix (r255307) introduced a regression on
armeb-linux-gnueabihf --with-cpu cortex-a9 --with-fpu neon-fp16:
FAIL: gfortran.fortran-torture/execute/scalarize2.f90 execution, -O3 -g
>From gcc-bugs-return-584041-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:27:41 2017
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Subject: [Bug tree-optimization/83232] fma3d spec2000 regression on zen with -Ofast (generic tuning) after r255268 by missed SLP oppurtunity
Date: Mon, 04 Dec 2017 11:27:00 -0000
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 4 Dec 2017, clyon at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83232
>
> Christophe Lyon <clyon at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |clyon at gcc dot gnu.org
>
> --- Comment #5 from Christophe Lyon <clyon at gcc dot gnu.org> ---
> I've noticed that this fix (r255307) introduced a regression on
> armeb-linux-gnueabihf --with-cpu cortex-a9 --with-fpu neon-fp16:
> FAIL: gfortran.fortran-torture/execute/scalarize2.f90 execution, -O3 -g
Please open a new bugreport for this. (and I only say "big endian...")
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Subject: [Bug target/70216] [SH] Implement __builtin_trap
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--- Comment #19 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to John Paul Adrian Glaubitz from comment #18)
> I can confirm that the patch from comment #6 resolves the problem for me.
Thanks for checking.
>
> Can we get it merged in one form or another?
>
Like I said in comment #10, it's OK to add this to GCC 7. However, if so, then
I'd like to implement the -mbuiltin-trap=insn-FFFD and make it the default for
Linux as discussed above with Rich.
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83267] New: [8 regression] [armeb] gfortran.fortran-torture/execute/scalarize2.f90 fails since r255307
Date: Mon, 04 Dec 2017 11:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83267
Bug ID: 83267
Summary: [8 regression] [armeb]
gfortran.fortran-torture/execute/scalarize2.f90 fails
since r255307
Product: gcc
Version: 8.0
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Since r255307, I've noticed a regression on
armeb-linux-gnueabihf --with-cpu cortex-a9 --with-fpu neon-fp16:
FAIL: gfortran.fortran-torture/execute/scalarize2.f90 execution, -O3 -g
>From gcc-bugs-return-584045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:41:22 2017
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From: "speryt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82990] Update the default -mzeroupper setting
Date: Mon, 04 Dec 2017 11:41:00 -0000
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--- Comment #10 from speryt at gcc dot gnu.org ---
Author: speryt
Date: Mon Dec 4 11:40:44 2017
New Revision: 255379
URL: https://gcc.gnu.org/viewcvs?rev=255379&root=gcc&view=rev
Log:
Fix PR82941 and PR82942 by adding proper vzeroupper generation on SKX.
Add X86_TUNE_EMIT_VZEROUPPER to indicate if vzeroupper instruction should
be inserted before a transfer of control flow out of the function. It is
turned on by default unless we are tuning for KNL. Users can always use
-mzeroupper or -mno-zeroupper to override X86_TUNE_EMIT_VZEROUPPER.
2017-12-04 Sebastian Peryt <sebastian.peryt@intel.com>
H.J. Lu <hongjiu.lu@intel.com>
gcc/
Bakcported from trunk
PR target/82941
PR target/82942
PR target/82990
* config/i386/i386.c (pass_insert_vzeroupper): Remove
TARGET_AVX512F check from gate condition.
(ix86_check_avx256_register): Changed to ...
(ix86_check_avx_upper_register): ... this. Add extra check for
VALID_AVX512F_REG_OR_XI_MODE.
(ix86_avx_u128_mode_needed): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_check_avx256_stores): Changed to ...
(ix86_check_avx_upper_stores): ... this. Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_after): Changed
avx_reg256_found to avx_upper_reg_found. Changed
ix86_check_avx256_stores to ix86_check_avx_upper_stores.
(ix86_avx_u128_mode_entry): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_exit): Ditto.
(ix86_option_override_internal): Set MASK_VZEROUPPER if
neither -mzeroupper nor -mno-zeroupper is used and
TARGET_EMIT_VZEROUPPER is set.
* config/i386/i386.h: (host_detect_local_cpu): New define.
(TARGET_EMIT_VZEROUPPER): New.
* config/i386/x86-tune.def: Add X86_TUNE_EMIT_VZEROUPPER.
gcc/testsuite/
Backported from trunk
PR target/82941
PR target/82942
PR target/82990
* gcc.target/i386/pr82941-1.c: New test.
* gcc.target/i386/pr82941-2.c: Likewise.
* gcc.target/i386/pr82942-1.c: Likewise.
* gcc.target/i386/pr82942-2.c: Likewise.
* gcc.target/i386/pr82990-1.c: Likewise.
* gcc.target/i386/pr82990-2.c: Likewise.
* gcc.target/i386/pr82990-3.c: Likewise.
* gcc.target/i386/pr82990-4.c: Likewise.
* gcc.target/i386/pr82990-5.c: Likewise.
* gcc.target/i386/pr82990-6.c: Likewise.
* gcc.target/i386/pr82990-7.c: Likewise.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82941-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82941-2.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82942-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82942-2.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-2.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-3.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-4.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-5.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-6.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-7.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/i386.c
branches/gcc-6-branch/gcc/config/i386/i386.h
branches/gcc-6-branch/gcc/config/i386/x86-tune.def
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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From: "speryt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82942] Generate vzeroupper with -mavx512f -mno-avx512er -O2
Date: Mon, 04 Dec 2017 11:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82942
--- Comment #9 from speryt at gcc dot gnu.org ---
Author: speryt
Date: Mon Dec 4 11:40:44 2017
New Revision: 255379
URL: https://gcc.gnu.org/viewcvs?rev=255379&root=gcc&view=rev
Log:
Fix PR82941 and PR82942 by adding proper vzeroupper generation on SKX.
Add X86_TUNE_EMIT_VZEROUPPER to indicate if vzeroupper instruction should
be inserted before a transfer of control flow out of the function. It is
turned on by default unless we are tuning for KNL. Users can always use
-mzeroupper or -mno-zeroupper to override X86_TUNE_EMIT_VZEROUPPER.
2017-12-04 Sebastian Peryt <sebastian.peryt@intel.com>
H.J. Lu <hongjiu.lu@intel.com>
gcc/
Bakcported from trunk
PR target/82941
PR target/82942
PR target/82990
* config/i386/i386.c (pass_insert_vzeroupper): Remove
TARGET_AVX512F check from gate condition.
(ix86_check_avx256_register): Changed to ...
(ix86_check_avx_upper_register): ... this. Add extra check for
VALID_AVX512F_REG_OR_XI_MODE.
(ix86_avx_u128_mode_needed): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_check_avx256_stores): Changed to ...
(ix86_check_avx_upper_stores): ... this. Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_after): Changed
avx_reg256_found to avx_upper_reg_found. Changed
ix86_check_avx256_stores to ix86_check_avx_upper_stores.
(ix86_avx_u128_mode_entry): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_exit): Ditto.
(ix86_option_override_internal): Set MASK_VZEROUPPER if
neither -mzeroupper nor -mno-zeroupper is used and
TARGET_EMIT_VZEROUPPER is set.
* config/i386/i386.h: (host_detect_local_cpu): New define.
(TARGET_EMIT_VZEROUPPER): New.
* config/i386/x86-tune.def: Add X86_TUNE_EMIT_VZEROUPPER.
gcc/testsuite/
Backported from trunk
PR target/82941
PR target/82942
PR target/82990
* gcc.target/i386/pr82941-1.c: New test.
* gcc.target/i386/pr82941-2.c: Likewise.
* gcc.target/i386/pr82942-1.c: Likewise.
* gcc.target/i386/pr82942-2.c: Likewise.
* gcc.target/i386/pr82990-1.c: Likewise.
* gcc.target/i386/pr82990-2.c: Likewise.
* gcc.target/i386/pr82990-3.c: Likewise.
* gcc.target/i386/pr82990-4.c: Likewise.
* gcc.target/i386/pr82990-5.c: Likewise.
* gcc.target/i386/pr82990-6.c: Likewise.
* gcc.target/i386/pr82990-7.c: Likewise.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82941-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82941-2.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82942-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82942-2.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-2.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-3.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-4.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-5.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-6.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-7.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/i386.c
branches/gcc-6-branch/gcc/config/i386/i386.h
branches/gcc-6-branch/gcc/config/i386/x86-tune.def
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-584046-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 11:41:22 2017
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From: "speryt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82941] Missing vzeroupper with -march=skylake-avx512 -O2
Date: Mon, 04 Dec 2017 11:41:00 -0000
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--- Comment #4 from speryt at gcc dot gnu.org ---
Author: speryt
Date: Mon Dec 4 11:40:44 2017
New Revision: 255379
URL: https://gcc.gnu.org/viewcvs?rev=255379&root=gcc&view=rev
Log:
Fix PR82941 and PR82942 by adding proper vzeroupper generation on SKX.
Add X86_TUNE_EMIT_VZEROUPPER to indicate if vzeroupper instruction should
be inserted before a transfer of control flow out of the function. It is
turned on by default unless we are tuning for KNL. Users can always use
-mzeroupper or -mno-zeroupper to override X86_TUNE_EMIT_VZEROUPPER.
2017-12-04 Sebastian Peryt <sebastian.peryt@intel.com>
H.J. Lu <hongjiu.lu@intel.com>
gcc/
Bakcported from trunk
PR target/82941
PR target/82942
PR target/82990
* config/i386/i386.c (pass_insert_vzeroupper): Remove
TARGET_AVX512F check from gate condition.
(ix86_check_avx256_register): Changed to ...
(ix86_check_avx_upper_register): ... this. Add extra check for
VALID_AVX512F_REG_OR_XI_MODE.
(ix86_avx_u128_mode_needed): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_check_avx256_stores): Changed to ...
(ix86_check_avx_upper_stores): ... this. Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_after): Changed
avx_reg256_found to avx_upper_reg_found. Changed
ix86_check_avx256_stores to ix86_check_avx_upper_stores.
(ix86_avx_u128_mode_entry): Changed
ix86_check_avx256_register to ix86_check_avx_upper_register.
(ix86_avx_u128_mode_exit): Ditto.
(ix86_option_override_internal): Set MASK_VZEROUPPER if
neither -mzeroupper nor -mno-zeroupper is used and
TARGET_EMIT_VZEROUPPER is set.
* config/i386/i386.h: (host_detect_local_cpu): New define.
(TARGET_EMIT_VZEROUPPER): New.
* config/i386/x86-tune.def: Add X86_TUNE_EMIT_VZEROUPPER.
gcc/testsuite/
Backported from trunk
PR target/82941
PR target/82942
PR target/82990
* gcc.target/i386/pr82941-1.c: New test.
* gcc.target/i386/pr82941-2.c: Likewise.
* gcc.target/i386/pr82942-1.c: Likewise.
* gcc.target/i386/pr82942-2.c: Likewise.
* gcc.target/i386/pr82990-1.c: Likewise.
* gcc.target/i386/pr82990-2.c: Likewise.
* gcc.target/i386/pr82990-3.c: Likewise.
* gcc.target/i386/pr82990-4.c: Likewise.
* gcc.target/i386/pr82990-5.c: Likewise.
* gcc.target/i386/pr82990-6.c: Likewise.
* gcc.target/i386/pr82990-7.c: Likewise.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82941-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82941-2.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82942-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82942-2.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-2.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-3.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-4.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-5.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-6.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr82990-7.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/i386.c
branches/gcc-6-branch/gcc/config/i386/i386.h
branches/gcc-6-branch/gcc/config/i386/x86-tune.def
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-584047-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 12:38:29 2017
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/82962] valgrind reports "Conditional jump or move depends on uninitialised value" in EXECUTE_COMMAND_LINE
Date: Mon, 04 Dec 2017 12:38:00 -0000
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--- Comment #6 from janus at gcc dot gnu.org ---
(In reply to janus from comment #0)
> ==16313== Conditional jump or move depends on uninitialised value(s)
> ==16313== at 0x4F3B7EA: _gfortran_execute_command_line_i4 (in
> /usr/lib/x86_64-linux-gnu/libgfortran.so.3.0.0)
>
> This only occurs if an EXITSTAT argument is passed, which is not initialized
> before the call. However, EXITSTAT is supposed to be an output argument
> AFAIK.
Actually I just noticed that the F08 standard defines the EXITSTAT argument of
EXECUTE_COMMAND_LINE as INTENT(INOUT), in contrast to CMDSTAT which is
INTENT(OUT).
Therefore not initializing EXITSTAT before the call is probably a user error,
making this PR invalid, I guess.
>From gcc-bugs-return-584048-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 12:40:17 2017
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/82962] valgrind reports "Conditional jump or move depends on uninitialised value" in EXECUTE_COMMAND_LINE
Date: Mon, 04 Dec 2017 12:40:00 -0000
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--- Comment #7 from janus at gcc dot gnu.org ---
One thing that could be done instead is to mention the INTENTs of the arguments
in the documentation:
https://gcc.gnu.org/onlinedocs/gfortran/EXECUTE_005fCOMMAND_005fLINE.html
>From gcc-bugs-return-584049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 13:12:27 2017
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82360] [8 Regression] tree check fail in get_inner_reference, at expr.c:6996
Date: Mon, 04 Dec 2017 13:12:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #11 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #9)
> Author: jason
> Date: Mon Nov 13 21:49:16 2017
> New Revision: 254710
>
> URL: https://gcc.gnu.org/viewcvs?rev=254710&root=gcc&view=rev
> Log:
> PR c++/82360 - ICE with static_cast in template.
>
> * call.c (perform_direct_initialization_if_possible): Check
> processing_template_decl.
> * typeck.c (build_static_cast_1): Likewise.
>
> Added:
> trunk/gcc/testsuite/g++.dg/template/cast5.C
> Modified:
> trunk/gcc/cp/ChangeLog
> trunk/gcc/cp/call.c
> trunk/gcc/cp/typeck.c
Aw, my latest gcc was built just 2 days before this... guess I'll have to
rebuild...
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Subject: [Bug rtl-optimization/83245] [8 regression] several tests fail starting with r255258
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83245
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-584051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 13:24:43 2017
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From: "zealot0630 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83268] New: internal compiler error: in lambda_expr_this_capture, at cp/lambda.c:785
Date: Mon, 04 Dec 2017 13:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83268
Bug ID: 83268
Summary: internal compiler error: in lambda_expr_this_capture,
at cp/lambda.c:785
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zealot0630 at gmail dot com
Target Milestone: ---
The following C++14 file produces an internal compiler error.
#include <functional>
int t(std::function<void(int&&)>&&);
struct X {
int f();
int operator()() {
return t([&](auto) -> void {
[x = f()]{}();
});
}
};
% g++ -std=c++14 -c bug.cpp
bug.cpp: In instantiation of ‘struct X::operator()()::<lambda(auto:1)> [with
auto:1 = int]::<lambda()>’:
bug.cpp:9:15: required from ‘X::operator()()::<lambda(auto:1)> [with auto:1 =
int]’
/usr/include/c++/7/bits/std_function.h:316:37: required from ‘static void
std::_Function_handler<void(_ArgTypes ...), _Functor>::_M_invoke(const
std::_Any_data&, _ArgTypes&& ...) [with _Functor =
X::operator()()::<lambda(auto:1)>; _ArgTypes = {int&&}]’
/usr/include/c++/7/bits/std_function.h:694:19: required from
‘std::function<_Res(_ArgTypes ...)>::function(_Functor) [with _Functor =
X::operator()()::<lambda(auto:1)>; <template-parameter-2-2> = void;
<template-parameter-2-3> = void; _Res = void; _ArgTypes = {int&&}]’
bug.cpp:10:4: required from here
bug.cpp:9:10: internal compiler error: in lambda_expr_this_capture, at
cp/lambda.c:785
[x = f()]{}();
~^~
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
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Subject: [Bug c++/83268] internal compiler error: in lambda_expr_this_capture, at cp/lambda.c:785
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--- Comment #1 from Zang MingJie <zealot0630 at gmail dot com> ---
Created attachment 42783
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42783&action=edit
testcase
>From gcc-bugs-return-584053-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 13:27:42 2017
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Subject: [Bug c++/83268] internal compiler error: in lambda_expr_this_capture, at cp/lambda.c:785
Date: Mon, 04 Dec 2017 13:27:00 -0000
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--- Comment #2 from Zang MingJie <zealot0630 at gmail dot com> ---
% gcc --version
gcc (Debian 7.2.0-16) 7.2.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>From gcc-bugs-return-584054-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 13:36:06 2017
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From: "ishiura-compiler at ml dot kwansei.ac.jp" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83269] New: Wrong constant folding
Date: Mon, 04 Dec 2017 13:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83269
Bug ID: 83269
Summary: Wrong constant folding
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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GCC 8.0.0 for x86_64 miscompiles the following code.
Reproduces on gcc-5.1.0 to gcc-6.3.0 and gcc-8.0.0 with -O1, and on gcc-4.4.7
or later with -O2.
% cat test.c
int main (void)
{
volatile unsigned char a = 1;
long b = 0x80000000L;
int c = - ( (int)(-b) - (-0x7FFFFFFF*a) );
if (c != 1) __builtin_abort();
return 0;
}
% gcc-8.0 test.c -O1
% ./a.out
zsh: abort (core dumped) ./a.out
% gcc-8.0 -v
Using built-in specs.
COLLECT_GCC=gcc-8.0
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --program-suffix=-8.0 --disable-multilib
--enable-languages=c
Thread model: posix
gcc version 8.0.0 20171109 (experimental) (GCC)
>From gcc-bugs-return-584055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 13:42:13 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/81197] [7/8 Regression] ICE with structured binding and lifetime-extended temporaries
Date: Mon, 04 Dec 2017 13:42:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42784
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42784&action=edit
gcc8-pr81197.patch
Untested fix.
>From gcc-bugs-return-584056-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 13:42:47 2017
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83269] Wrong constant folding
Date: Mon, 04 Dec 2017 13:42:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-04
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r210979.
>From gcc-bugs-return-584057-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 13:54:28 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/83230] [8 regression] segmentation fault in bind C C/C++
Date: Mon, 04 Dec 2017 13:54:00 -0000
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
As it says at https://gcc.gnu.org/bugs/ ...
"Before reporting that GCC compiles your code incorrectly, compile it with
gcc -Wall -Wextra and see whether this shows anything wrong with your code."
>From gcc-bugs-return-584058-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 13:58:10 2017
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83230] [8 regression] segmentation fault in bind C C/C++
Date: Mon, 04 Dec 2017 13:58:00 -0000
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--- Comment #10 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Sorry for my first false positive, but I'm actually lacking experience with
C++.
>From gcc-bugs-return-584059-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 13:58:10 2017
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
Date: Mon, 04 Dec 2017 13:58:00 -0000
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--- Comment #8 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Andrew Roberts from comment #7)
> I get the same thing if I just use -mcpu=native:
>
> /usr/local/gcc/bin/gcc -o matrix-v6 -mcpu=native -mfpu=auto -O3 matrix.c
> cc1: error: -mfloat-abi=hard: selected processor lacks an FPU
>
Ok, I'll look a bit further.
> I realize the aarch64 compiler does not need -mfpu=auto, but I was wondering
> if it was worth at least not rejecting it so makefiles can be portable
> between arm and aarch64. At present you get:
>
> gcc: error: unrecognized command line option ‘-mfpu=auto’
>
No, that would be a bad idea. -mfpu=auto is supposed to be a transition path
to making the -mfpu option obsolete (ie doing the way we do things on AArch64).
Adding that to the aarch64 compiler would be a backwards step.
> and the compile fails
>
> A Rasbperry PI Zero is the cheapest and easiest armv6 option, although it
> does take 24hrs to build the compiler
>From gcc-bugs-return-584060-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 14:05:16 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83255] [8 Regression] [graphite] Wrong code w/ -O1 -floop-nest-optimize
Date: Mon, 04 Dec 2017 14:05:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Dec 4 14:04:36 2017
New Revision: 255382
URL: https://gcc.gnu.org/viewcvs?rev=255382&root=gcc&view=rev
Log:
2017-12-04 Richard Biener <rguenther@suse.de>
PR tree-optimization/83255
* graphite-isl-ast-to-gimple.c (translate_isl_ast_node_for):
Re-add zero-iteration check.
* gcc.dg/graphite/pr83255.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/graphite/pr83255.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/graphite-isl-ast-to-gimple.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/83255] [8 Regression] [graphite] Wrong code w/ -O1 -floop-nest-optimize
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-584062-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 14:06:40 2017
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Subject: [Bug fortran/83230] [8 regression] segmentation fault in bind C C/C++
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--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
All the more reason to enable compiler warnings.
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Subject: [Bug c++/83258] Rejecting function pointer non-type template parameter without linkage
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-584064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 14:44:28 2017
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgomp/83270] New: [OMP 3.1] implement TASKYIELD
Date: Mon, 04 Dec 2017 14:44:00 -0000
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Bug ID: 83270
Summary: [OMP 3.1] implement TASKYIELD
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgomp
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As noted in the TODO list at https://gcc.gnu.org/wiki/openmp and in
https://gcc.gnu.org/ml/gcc-patches/2011-08/msg00080.html, the implementation of
TASKYIELD is still a stub.
I don't really know what it takes to implement this properly, but it would
definitely be useful to have it.
The function 'GOMP_taskyield' in libgomp/task.c is empty on the current trunk.
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Subject: [Bug libgomp/83270] [OMP 3.1] implement TASKYIELD
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|wrong-code |
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Wrong-code makes no sense, our implementation is valid. taskyield is just an
optimization hint that we could schedule some other task, but without untied
task that doesn't make much sense, the constraints on what other task can be
scheduled are pretty tight in that case.
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Subject: [Bug sanitizer/81281] [6/7/8 Regression] UBSAN: false positive, dropped promotion to long type.
Date: Mon, 04 Dec 2017 14:52:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42785
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42785&action=edit
gcc8-pr81281-test.patch
This was fixed by r251651 for -fsanitize=undefined. Attaching testcase in
patch form. That said, without -fsanitize=unreachable the bug is still latent.
If we start just with:
int a = (int) (-2024172551 - (long long)ci);
then we properly fold it into:
int a = (int) (2270794745 - (unsigned int) ci);
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Subject: [Bug c++/83271] New: const variable previously declared "extern" results in "weak declaration must be public" error
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83271
Bug ID: 83271
Summary: const variable previously declared "extern" results in
"weak declaration must be public" error
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: alexey.salmin at gmail dot com
Target Milestone: ---
The following code works well and produces a global read-only symbol:
extern const int x; // typically comes from a header file
const int x = 0;
But if you add a weak attribute, it fails:
extern const int x;
const int __attribute__((weak)) x = 0;
error: weak declaration of ‘x’ must be public
Even though "const" implies internal linkage in C++, the standard explicitly
makes an exception for names that were previously declared "extern" (see C++17
6.5 "Program and linkage"). The definition in question is already "public", it
should work without the "extern" specifier.
I've encountered this issue with g++ 6.4.0 20171026 (Debian 6.4.0-9) on
x86_64-linux-gnu. It seems to be reproducible with all g++ versions available
on godbolt.org (from 4.4 to 8.0 trunk).
>From gcc-bugs-return-584068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 15:08:45 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/81281] [6/7/8 Regression] UBSAN: false positive, dropped promotion to long type.
Date: Mon, 04 Dec 2017 15:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81281
--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 4 Dec 2017, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81281
>
> --- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Created attachment 42785
> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42785&action=edit
> gcc8-pr81281-test.patch
>
> This was fixed by r251651 for -fsanitize=undefined. Attaching testcase in
> patch form. That said, without -fsanitize=unreachable the bug is still latent.
> If we start just with:
> int a = (int) (-2024172551 - (long long)ci);
> then we properly fold it into:
> int a = (int) (2270794745 - (unsigned int) ci);
Yeah, those sanitize_flags_p (SANITIZE_SI_OVERFLOW) "fixes" are always
wrong... The 2nd hunk looks ok though
>From gcc-bugs-return-584069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 15:26:34 2017
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/68810] [8 regression] FAIL: g++.dg/cpp0x/constexpr-reinterpret1.C -- test for errors -- -m32
Date: Mon, 04 Dec 2017 15:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68810
--- Comment #17 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #16)
> David, does your patchset solve this?
The v2 version of the kit
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg00880.html
doesn't affect it.
The work-in-progress v3 version of the kit
https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01588.html
actually breaks the warning, stopping it from appearing altogether (this turns
out to be one of the regressions mentioned in that post). I'm investigating
why.
>From gcc-bugs-return-584070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 15:29:25 2017
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Subject: [Bug c++/68810] [8 regression] FAIL: g++.dg/cpp0x/constexpr-reinterpret1.C -- test for errors -- -m32
Date: Mon, 04 Dec 2017 15:29:00 -0000
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--- Comment #18 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
...but presumably a question here is "what is the ideal output of the compiler
for that code?", and the answer might be:
constexpr-reinterpret1.C:19:??: error: reinterpret_cast from integer to pointer
{ return *((Inner *)4); }
^~~~~~~~~~
and it ought to be possible to implement that with the more ambitious v3 patch
kit.
>From gcc-bugs-return-584071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 15:40:10 2017
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Subject: [Bug c/83236] "Did you mean" suggestions maybe shouldn't offer implementation-private names
Date: Mon, 04 Dec 2017 15:40:00 -0000
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--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to Zack Weinberg from comment #3)
> Maybe name_reserved_for_implementation_p should be a langhook?
I'm only using it in the C/C++ frontends, and the implementation is identical
for both, so I don't think so - unless I'm missing something? I'm working on a
version of the patch that moves the macro-spellchecking to c-family.
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Subject: [Bug c++/83271] const variable previously declared "extern" results in "weak declaration must be public" error
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |rejects-valid
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Last reconfirmed| |2017-12-04
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Subject: [Bug target/82096] ICE in int_mode_for_mode, at stor-layout.c:403 with arm-linux-gnueabi
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Vidya Praveen <vp at gcc dot gnu.org> changed:
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CC| |vp at gcc dot gnu.org
--- Comment #1 from Vidya Praveen <vp at gcc dot gnu.org> ---
I can't reproduce this on GCC 8.
>From gcc-bugs-return-584074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 16:10:49 2017
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From: "slash.tmp at free dot fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/83272] New: Unnecessary mask instruction generated
Date: Mon, 04 Dec 2017 16:10:00 -0000
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Bug ID: 83272
Summary: Unnecessary mask instruction generated
Product: gcc
Version: 7.2.0
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Consider the following testcase:
char foo(unsigned char n)
{
static const char map[16] = "wxyz";
return map[n / 16];
}
gcc-7 -O2 -march=haswell -S testcase.c generates:
foo:
shrb $4, %dil
andl $15, %edi
movzbl map.2295(%rdi), %eax
ret
On this platform, CHAR_BIT = 8 and UCHAR_MAX = 255
Therefore n / 16 is guaranteed to be less than 16.
Yet, GCC generates an unnecessary mask instruction (andl $15, %edi).
https://gcc.gnu.org/ml/gcc-help/2017-11/msg00102.html
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/78496] [7 Regression] Missed opportunities for jump threading
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8 Regression] Missed |[7 Regression] Missed
|opportunities for jump |opportunities for jump
|threading |threading
--- Comment #13 from Jeffrey A. Law <law at redhat dot com> ---
Fixed on the trunk. No plans to backport.
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Subject: [Bug tree-optimization/78496] [7/8 Regression] Missed opportunities for jump threading
Date: Mon, 04 Dec 2017 16:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78496
--- Comment #12 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Mon Dec 4 16:14:24 2017
New Revision: 255387
URL: https://gcc.gnu.org/viewcvs?rev=255387&root=gcc&view=rev
Log:
PR tree-optimizatin/78496
* gimple-ssa-evrp-analyze.h
(evrp_range_analyzer::get_vr_values): Simplify.
* gimple-ssa-evrp-analyze.c: Corresponding changes.
* tree-ssa-dom.c: Include alloc-pool.h, tree-vrp.h, vr-values.h
and gimple-ssa-evrp-analyze.h.
(dom_opt_dom_walker class): Add evrp_range_analyzer member.
(simplify_stmt_for_jump_threading): Copy a blob of code from
tree-vrp.c to use ranges to simplify statements.
(dom_opt_dom_walker::before_dom_children): Call
evrp_range_analyzer::{enter,record_ranges_from_stmt} methods.
(dom_opt_dom_walker::after_dom_children): Similarly for
evrp_range_analyzer::leave.
(dom_opt_dom_walker::optimize_stmt): Use EVRP ranges to optimize
conditionals.
PR tree-optimization/78496
* gcc.dg/builtin-unreachable-6.c: Disable DOM.
* gcc.dg/builtin-unreachable-6a.c: New test.
* gcc.dg/tree-ssa/20030922-1.c: No longer XFAIL.
* gcc.dg/ssa-dom-branch-1.c: Tweak expected output.
Added:
trunk/gcc/testsuite/gcc.dg/builtin-unreachable-6a.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-evrp-analyze.h
trunk/gcc/gimple-ssa-evrp.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/builtin-unreachable-6.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/20030922-2.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-branch-1.c
trunk/gcc/tree-ssa-dom.c
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Subject: [Bug c/83236] "Did you mean" suggestions maybe shouldn't offer implementation-private names
Date: Mon, 04 Dec 2017 16:40:00 -0000
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--- Comment #5 from Zack Weinberg <zackw at panix dot com> ---
I was just thinking that other language front-ends might want to offer
spell-checking suggestions with their own rules for which names are/aren't
appropriate to suggest in context, but maybe we can worry about that when it
happens.
>From gcc-bugs-return-584078-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 16:47:25 2017
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Subject: [Bug c/83236] "Did you mean" suggestions maybe shouldn't offer implementation-private names
Date: Mon, 04 Dec 2017 16:47:00 -0000
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--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Ah, thanks. Indeed, and this stuff is highly FE specific.
>From gcc-bugs-return-584079-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 16:49:28 2017
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80907] [6/7 Regression] False positive: "warning: array subscript is above array bounds"
Date: Mon, 04 Dec 2017 16:49:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7/8 Regression] False |[6/7 Regression] False
|positive: "warning: array |positive: "warning: array
|subscript is above array |subscript is above array
|bounds" |bounds"
--- Comment #2 from Jeffrey A. Law <law at redhat dot com> ---
Richi's patches for 83202 fixed this on the trunk.
>From gcc-bugs-return-584080-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 16:59:45 2017
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Subject: [Bug sanitizer/81281] [6/7/8 Regression] UBSAN: false positive, dropped promotion to long type.
Date: Mon, 04 Dec 2017 16:59:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So it is indeed the
/* (T)(P + A) - (T)(P + B) -> (T)A - (T)B */
(for add (plus pointer_plus)
(simplify
(minus (convert (add @@0 @1))
(convert (add @0 @2)))
(if (element_precision (type) <= element_precision (TREE_TYPE (@1))
/* For integer types, if A has a smaller type
than T the result depends on the possible
overflow in P + A.
E.g. T=size_t, A=(unsigned)429497295, P>0.
However, if an overflow in P + A would cause
undefined behavior, we can assume that there
is no overflow. */
|| (INTEGRAL_TYPE_P (TREE_TYPE (@0))
&& TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (@0)))
/* For pointer types, if the conversion of A to the
final type requires a sign- or zero-extension,
then we have to punt - it is not defined which
one is correct. */
|| (POINTER_TYPE_P (TREE_TYPE (@0))
&& TREE_CODE (@1) == INTEGER_CST
&& tree_int_cst_sign_bit (@1) == 0
&& TREE_CODE (@2) == INTEGER_CST
&& tree_int_cst_sign_bit (@2) == 0))
(minus (convert @1) (convert @2)))))))
case, where we have:
op0 (int) ((((unsigned int) ll - (unsigned int) ci) - (unsigned int) i) +
2270794745)
op1 (int) ((((unsigned int) ll - (unsigned int) ci) - (unsigned int) i) +
(unsigned int) ci);
type here is int, @0/@1/@2 all have unsigned type.
The (T)(P + A) - (T)(P + B) to (T)A - (T)B transformation is incorrect if
TYPE_OVERFLOW_UNDEFINED (type) (or its element type)
and either !TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (@0)) (or its element type), or
TREE_TYPE (@1) has larger element precision.
Say if T is int, and TREE_TYPE (P) is unsigned, then e.g. random example of A =
0U+INT_MIN, B = 1U, P = -1U overflows only in the (int) INT_MIN - (int) 1 case,
but doesn't overflow in the (int)(-1U+INT_MIN) - (int)(1U + -1U) case (many
other examples).
We need to do the subtraction in an unsigned_type_for (type) instead and only
cast to type at the end.
For the POINTER_PLUS_EXPR case, the explicitly enabled case is only if both @1
and @2 are INTEGER_CSTs with MSB clear which is fine for the widening
conversion to type, but for equal or narrowing one not really sure.
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From: "nico at josuttis dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83273] New: if constexpr does not fail with run-time conditions
Date: Mon, 04 Dec 2017 17:07:00 -0000
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Bug ID: 83273
Summary: if constexpr does not fail with run-time conditions
Product: gcc
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The following C++17 program should not compile, but it does:
#include <iostream>
int main()
{
auto d = 42;
if constexpr (d > 0) {
std::cout << "oops \n";
}
}
This even works inside a loop over different values of d.
And I found it trying this:
if constexpr (auto obj = 42; obj == 0) {
//...
}
which should need a const/constexpr in the if initialization.
Reported as recommended by Jonathan Wakely.
Might also be a problem in 7.x
>From gcc-bugs-return-584082-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 17:19:08 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/81281] [6/7/8 Regression] UBSAN: false positive, dropped promotion to long type.
Date: Mon, 04 Dec 2017 17:19:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Even the
(T)P - (T)(P + A) -> -(T) A
transformation looks wrong, consider A being 0U+INT_MIN, and P -1U.
(int)-1U - (int)(-1U+INT_MIN) is INT_MIN without overflow, while -(int)INT_MIN
overflows. Note it doesn't look like fold-const.c, at least the removed spot
from it, was doing what the match.pd is doing at least for non-pointers.
Note r251651 was actually the right fix, just not for this issue, but for the
general issue that through performing say (int) (long_long_a - long_long_b)
to (int) ((unsigned) long_long_a - (unsigned) long_long_b)) optimization we
won't be able to detect UB user code had, but the optimized form doesn't.
That just means that the sanitizer is less useful in finding bugs in the
compiler transformations. Perhaps we could have a debug counter or param or
something similar where we'd accept detecting fewer UBs on user code but gain
the possibility to detect more invalid transformations like this one.
>From gcc-bugs-return-584083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 17:22:52 2017
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Subject: [Bug fortran/83274] New: [PDT] ICE in delete_root and missing error
Date: Mon, 04 Dec 2017 17:22:00 -0000
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Bug ID: 83274
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One remaining issue is that a PDT definition statement cannot have
an additional component-spec-list or a second type-param-name-list.
$ cat z1.f90
program p
type t(a)(b)
integer, kind :: a
integer, len :: b
end type
end
$ cat z2.f90
program p
type t(a)()
integer, len :: a
end type
end
$ cat z3.f90
program p
type t(a)(:)
integer :: a
end type
end
$ cat z4.f90
program p
type t(a)(b)(c)
integer, len :: a
integer, kind :: b
integer :: c
end type
end
#...
$ gfortran-8-20171203 -c z1.f90
f951: internal compiler error: Segmentation fault
0xb6a96f crash_signal
../../gcc/toplev.c:325
0x66ce9b delete_root
../../gcc/fortran/bbt.c:150
0x66d06e gfc_delete_bbt(void*, void*, int (*)(void*, void*))
../../gcc/fortran/bbt.c:197
0x725c48 gfc_delete_symtree(gfc_symtree**, char const*)
../../gcc/fortran/symbol.c:2925
0x727416 gfc_restore_last_undo_checkpoint()
../../gcc/fortran/symbol.c:3694
0x6e5f67 reject_statement
../../gcc/fortran/parse.c:2546
0x6e607c match_word_omp_simd
../../gcc/fortran/parse.c:98
0x6ea06b match_word
../../gcc/fortran/parse.c:565
0x6ea06b decode_statement
../../gcc/fortran/parse.c:565
0x6eb544 next_free
../../gcc/fortran/parse.c:1225
0x6eb544 next_statement
../../gcc/fortran/parse.c:1457
0x6ed34c parse_spec
../../gcc/fortran/parse.c:3651
0x6ef323 parse_progunit
../../gcc/fortran/parse.c:5638
0x6f08e4 gfc_parse_file()
../../gcc/fortran/parse.c:6178
0x73537f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-584084-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 17:23:36 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83274] [PDT] ICE in delete_root and missing error
Date: Mon, 04 Dec 2017 17:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83274
G. Steinmetz <gscfq@t-online.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |82173
--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
These examples should be rejected :
$ cat z7.f90
program p
type t
end type
type(t( )) :: a
type(t(0)) :: b
type(t(:)) :: c
type(t(*)) :: d
end
$ cat z8.f90
program p
type t()
integer :: a
end type
end
$ gfortran-8-20171203 -c z7.f90
$ gfortran-8-20171203 -Wall -c z8.f90
$
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82173
[Bug 82173] [meta-bug] Parameterized derived type errors
>From gcc-bugs-return-584085-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 17:27:43 2017
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From: "gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83275] New: [PDT] ICE in get_pdt_constructor, at fortran/resolve.c:1185 (and others)
Date: Mon, 04 Dec 2017 17:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83275
Bug ID: 83275
Summary: [PDT] ICE in get_pdt_constructor, at
fortran/resolve.c:1185 (and others)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Related to pr83274, in order to avoid an overloaded PR.
According to f2008 4.5.3.1 and 1.4.3, a type-param-name-list in
a PDT definition statement should have at least one element (name).
$ cat z1.f90
program p
type t()
end type
data x /t()/
end
$ gfortran-8-20171203 -c z1.f90
f951: internal compiler error: in get_pdt_constructor, at
fortran/resolve.c:1185
0x6f7d0f get_pdt_constructor
../../gcc/fortran/resolve.c:1185
0x70e1de resolve_structure_cons
../../gcc/fortran/resolve.c:1247
0x6fe629 gfc_resolve_expr(gfc_expr*)
../../gcc/fortran/resolve.c:6763
0x69b55f gfc_reduce_init_expr(gfc_expr*)
../../gcc/fortran/expr.c:2696
0x6f5ab7 gfc_match_structure_constructor(gfc_symbol*, gfc_expr**)
../../gcc/fortran/primary.c:3039
0x682c7c match_data_constant
../../gcc/fortran/decl.c:412
0x682d66 top_val_list
../../gcc/fortran/decl.c:457
0x682f99 gfc_match_data()
../../gcc/fortran/decl.c:586
0x6e6059 match_word_omp_simd
../../gcc/fortran/parse.c:93
0x6eaa7f match_word
../../gcc/fortran/parse.c:467
0x6eaa7f decode_statement
../../gcc/fortran/parse.c:467
0x6eb544 next_free
../../gcc/fortran/parse.c:1225
0x6eb544 next_statement
../../gcc/fortran/parse.c:1457
0x6ece2c parse_spec
../../gcc/fortran/parse.c:3835
0x6ef323 parse_progunit
../../gcc/fortran/parse.c:5638
0x6f08e4 gfc_parse_file()
../../gcc/fortran/parse.c:6178
0x73537f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-584086-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 17:28:25 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83275] [PDT] ICE in get_pdt_constructor, at fortran/resolve.c:1185 (and others)
Date: Mon, 04 Dec 2017 17:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83275
G. Steinmetz <gscfq@t-online.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |82173
--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
$ cat z2.f90
program p
type t()
end type
type, extends(t) :: t2
end type
end
$ gfortran-8-20171203 -c z2.f90
f951: internal compiler error: Segmentation fault
0xb6a96f crash_signal
../../gcc/toplev.c:325
0x68dca4 gfc_match_derived_decl()
../../gcc/fortran/decl.c:9905
0x6e6059 match_word_omp_simd
../../gcc/fortran/parse.c:93
0x6ea06b match_word
../../gcc/fortran/parse.c:565
0x6ea06b decode_statement
../../gcc/fortran/parse.c:565
0x6eb544 next_free
../../gcc/fortran/parse.c:1225
0x6eb544 next_statement
../../gcc/fortran/parse.c:1457
0x6ece2c parse_spec
../../gcc/fortran/parse.c:3835
0x6ef323 parse_progunit
../../gcc/fortran/parse.c:5638
0x6f08e4 gfc_parse_file()
../../gcc/fortran/parse.c:6178
0x73537f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82173
[Bug 82173] [meta-bug] Parameterized derived type errors
>From gcc-bugs-return-584087-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 17:29:18 2017
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Subject: [Bug fortran/83275] [PDT] ICE in get_pdt_constructor, at fortran/resolve.c:1185 (and others)
Date: Mon, 04 Dec 2017 17:29:00 -0000
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--- Comment #2 from G. Steinmetz <gscfq@t-online.de> ---
$ cat z5.f90
program p
type t(a)
allocate (a)
end type
end
$ gfortran-8-20171203 -c z5.f90
f951: internal compiler error: Segmentation fault
0xb6a96f crash_signal
../../gcc/toplev.c:325
0x6fc247 gfc_impure_variable(gfc_symbol*)
../../gcc/fortran/resolve.c:15599
0x6c8878 gfc_match_allocate()
../../gcc/fortran/match.c:4048
0x6e6059 match_word_omp_simd
../../gcc/fortran/parse.c:93
0x6e9e89 match_word
../../gcc/fortran/parse.c:439
0x6e9e89 decode_statement
../../gcc/fortran/parse.c:439
0x6eb544 next_free
../../gcc/fortran/parse.c:1225
0x6eb544 next_statement
../../gcc/fortran/parse.c:1457
0x6ecabd parse_derived
../../gcc/fortran/parse.c:3255
0x6ecabd parse_spec
../../gcc/fortran/parse.c:3796
0x6ef323 parse_progunit
../../gcc/fortran/parse.c:5638
0x6f08e4 gfc_parse_file()
../../gcc/fortran/parse.c:6178
0x73537f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-584088-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 17:32:56 2017
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Subject: [Bug c/83276] New: ICE in pre_and_rev_post_order_compute, at cfganal.c:1050
Date: Mon, 04 Dec 2017 17:32:00 -0000
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Bug ID: 83276
Summary: ICE in pre_and_rev_post_order_compute, at
cfganal.c:1050
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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This snippet together with -fopenmp :
$ cat z1.c
int f ()
{
int i;
#pragma omp parallel for
for (i = 0; i < 4; ++i)
__builtin_return (0);
}
$ gcc-8-20171203 -c z1.c -fopenmp
during GIMPLE pass: ssa
z1.c: In function 'f._omp_fn.0':
z1.c:7:1: internal compiler error: in pre_and_rev_post_order_compute, at
cfganal.c:1050
}
^
0x736c11 pre_and_rev_post_order_compute(int*, int*, bool)
../../gcc/cfganal.c:1050
0x10d2a0a dom_walker::dom_walker(cdi_direction, bool, int*)
../../gcc/domwalk.c:191
0xb2f2cc mark_def_dom_walker::mark_def_dom_walker(cdi_direction)
../../gcc/tree-into-ssa.c:2325
0xb36aaa execute
../../gcc/tree-into-ssa.c:2456
>From gcc-bugs-return-584089-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 17:34:01 2017
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83277] New: [8 Regression] [graphite] Wrong code w/ -O2 -floop-nest-optimize
Date: Mon, 04 Dec 2017 17:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83277
Bug ID: 83277
Summary: [8 Regression] [graphite] Wrong code w/ -O2
-floop-nest-optimize
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-8.0.0-alpha20171126 snapshot (r255155), as well as gcc-8.0.0-alpha20171203
snapshot (r255368) w/ r255382 applied on top of it, produce wrong code w/ -O2
-floop-nest-optimize for the following snippet:
int rk, si = 0;
int jr[2];
int
wv (signed char n8)
{
const int tw = 8;
int xq[tw];
int bj, pu = 0;
for (bj = 0; bj < tw; ++bj)
xq[bj] = 0;
bj = 0;
while (bj < 1)
{
int gs = n8 ^ 128;
if (gs != 0)
{
int u7[3];
while (bj < 2)
{
u7[bj] = 0;
++bj;
}
jr[0] = u7[0];
rk = xq[0];
pu = n8;
if (si != 0)
return si;
}
}
return pu;
}
int
main (void)
{
signed char ax = 1;
return wv (ax) != ax;
}
% gcc-8.0.0-alpha20171203 -O2 -o good lu41pybr.c && ./good
% echo $?
0
% gcc-8.0.0-alpha20171203 -O2 -floop-nest-optimize -o bad lu41pybr.c && ./bad
zsh: exit 1 ./bad
% echo $?
1
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83273] if constexpr does not fail with run-time conditions
Date: Mon, 04 Dec 2017 17:37:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
tree
finish_if_stmt_cond (tree cond, tree if_stmt)
{
cond = maybe_convert_cond (cond);
if (IF_STMT_CONSTEXPR_P (if_stmt)
&& is_constant_expression (cond)
&& !value_dependent_expression_p (cond))
{
cond = instantiate_non_dependent_expr (cond);
cond = cxx_constant_value (cond, NULL_TREE);
}
So, if is_constant_expression is true, we do the right thing.
There is just no diagnostics if cond fails the is_constant_expression check and
isn't value dependent. We actually treat that if constexpr like normal if,
with both then and else evaluated.
>From gcc-bugs-return-584091-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 17:38:52 2017
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83262] SELECT CASE slower than IF/ELSE
Date: Mon, 04 Dec 2017 17:38:00 -0000
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--- Comment #8 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, Dec 04, 2017 at 10:03:01AM +0000, dominiq at lps dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83262
>
> --- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > Dick Henderson in clf claims that there is a bug in the code.
> > You're comparing apples and oranges. Mike Metcalf ran the
> > code with Dick's suggested change.
>
> All my timings after comment 3 are done with the change of 'n' to 'i'.
>
Then you may want to update the testcase.
>From gcc-bugs-return-584092-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 17:42:07 2017
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Subject: [Bug fortran/83274] [PDT] ICE in delete_root and missing error
Date: Mon, 04 Dec 2017 17:42:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-04
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed.
>From gcc-bugs-return-584093-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 17:44:17 2017
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Subject: [Bug fortran/83275] [PDT] ICE in get_pdt_constructor, at fortran/resolve.c:1185 (and others)
Date: Mon, 04 Dec 2017 17:44:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed.
>From gcc-bugs-return-584094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 17:55:09 2017
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Subject: [Bug tree-optimization/81165] [8 Regression] Regression in GCC-8.0.0's optimizer
Date: Mon, 04 Dec 2017 17:55:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #10 from Jeffrey A. Law <law at redhat dot com> ---
WRT c#9. Precisely. There's just one too many statements in the block for the
threader to think it's profitable to clone the block.
I've long wanted to have some kind of indication of how many statements are
going to be eliminated by jump threading within the duplicated block so that we
didn't have to be so pessimistic. There's at least one more BZ in the
regression list which touches on this issue. Here's the block in question:
# t0_36 = PHI <-1(3), 0(2)>
# t1_37 = PHI <t1_31(3), 2(2)>
# prephitmp_18 = PHI <_17(3), 0(2)>
# prephitmp_19 = PHI <_9(3), 2(2)>
# VUSE <.MEM_28>
x0.3_41 = x0;
_42 = (int) x0.3_41;
_43 = 29 % _42;
_44 = _43 & 25;
_45 = (long unsigned int) _44;
_46 = _45 * 10;
_47 = 128 % _46;
_48 = (char) _47;
_49 = (unsigned int) _48;
_50 = prephitmp_18 + _49;
_51 = (int) _50;
if (_51 < 0)
goto <bb 4>; [85.00%]
else
goto <bb 7>; [15.00%]
Essentially starting at the control statement, we could realize that _51 is a
single use SSA_NAME. So if we thread, it's defining statement will go away, so
we don't need to count it. THen we look at its operand(s). _50. _50 is
single use as well, so its defining statement will go away. And so-on until we
hit the start of the block. We can then use that information to get a much
better estimation of the codesize cost of cloning the block.
Alex, want to take a stab at it?
>From gcc-bugs-return-584095-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 18:05:19 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83246] internal compiler error or loader problem might be related to a PARAMETER statement being in a BLOCK
Date: Mon, 04 Dec 2017 18:05:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2017-12-04
Ever confirmed|0 |1
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (8.0).
>From gcc-bugs-return-584096-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 18:11:56 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/81281] [6/7/8 Regression] UBSAN: false positive, dropped promotion to long type.
Date: Mon, 04 Dec 2017 18:11:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
void
foo (unsigned p, unsigned a, unsigned b)
{
unsigned q = p + 7;
if (a - (1U + __INT_MAX__) >= 2)
__builtin_unreachable ();
int d = p + b;
int c = p + a;
if (c - d != __INT_MAX__)
__builtin_abort ();
}
void
bar (unsigned p, unsigned a)
{
unsigned q = p + 7;
if (a - (1U + __INT_MAX__) >= 2)
__builtin_unreachable ();
int c = p;
int d = p + a;
if (c - d != -__INT_MAX__ - 1)
__builtin_abort ();
}
int
main ()
{
foo (-1U, 1U + __INT_MAX__, 1U);
bar (-1U, 1U + __INT_MAX__);
return 0;
}
is a testcase that fails on the trunk with -O2 because of this (without any
sanitization).
On the other side, when add is a plus and not pointer_plus, the pattern doesn't
contain :c as I found when writing the testcase, so it matches only if the
SSA_NAMEs are in the right order.
>From gcc-bugs-return-584097-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 18:14:29 2017
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Subject: [Bug sanitizer/81601] [7/8 Regression] incorrect Warray-bounds warning with -fsanitize
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #8 from Jeffrey A. Law <law at redhat dot com> ---
The two key blocks are:
bb2:
_3 = __builtin_object_size (tp_2(D), 0);
_4 = &tp_2(D)->D.2254;
GIMPLE_NOP
_5 = tp_2(D)->chrono_type;
if (_5 == 0)
goto <bb 3>; [50.00%]
else
goto <bb 6>; [50.00%]
bb3:
now_6 = tcp_jiffies32;
_7 = BIT_FIELD_REF <*tp_2(D), 8, 128>;
_8 = _7 & 3;
if (_8 != 0)
goto <bb 4>; [50.00%]
else
goto <bb 5>; [50.00%]
Where the out of bounds access occurs in BB4 which can only be reached via BB3.
We essentially need to prove that _5 and _8 are equivalent. The only good news
is that the edge 2->3 dominates bb3 so this could (in theory) be handled with
good equivalence processing without jump threading.
Are we allowed to use types like this in a gimple conditional?
<unnamed-unsigned:2> _5;
If so, then one approach would be first focus on BB3. We'd want to combine the
BIT_FIELD_REF and masking into a single BIT_FIELD_REF and test the result of
that without conversion. Could forwprop handle that perhaps?
Once the BIT_FIELD_REF just reads two bits, then we'd have a fighting chance of
realizing that the BIT_FIELD_REF is just a reference to tp_2->chrono_type.
Which we could lookup in the hash table has _5 which has a known constant value
of zero.
Not working on this, but figured I'd at least chime in with some thoughts on
how we might be able to approach...
>From gcc-bugs-return-584098-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 18:17:25 2017
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Subject: [Bug sanitizer/81281] [6/7/8 Regression] UBSAN: false positive, dropped promotion to long type.
Date: Mon, 04 Dec 2017 18:17:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Note the #c8 testcase started failing with r247578 - before that we weren't
doing that good job in evrp to optimize it.
>From gcc-bugs-return-584099-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 18:25:51 2017
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Subject: [Bug target/83252] Wrong code with "-march=skylake-avx512 -O3"
Date: Mon, 04 Dec 2017 18:25:00 -0000
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--- Comment #9 from Dmitry Babokin <babokin at gmail dot com> ---
(In reply to Richard Biener from comment #8)
> I suppose one could try scripting something with -fdisable-{tree,rtl}-$dump
> and seeding the list of passes to enable/disable with -fdump-{tree,rtl}-all.
>
> Of course some -fdisable-* are "invalid" and will cause "interesting"
> downstream
> effects...
>
> Sometimes I do this manually for cases where it isn't obvious who's doing sth
> wrong...
The main downside of this approach is that it requires understanding of GCC
compiler internals. And GCC bug tracker doesn't even have generic "new bugs"
component to assign, which means people need to have secret knowledge about
compiler internals. Would be good to address this problem in the long run and
make bug filing process more friendly for outsiders.
Don't take me wrong, my bugs are almost always are addressed blazingly fast and
I'm super happy about it. But I still think there are things which can make
life for bug filing people easier.
>From gcc-bugs-return-584100-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 18:38:19 2017
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Subject: [Bug middle-end/82286] [6/7 Regression] Wrong array subscript is above array bounds
Date: Mon, 04 Dec 2017 18:38:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
Summary|[6/7/8 Regression] Wrong |[6/7 Regression] Wrong
|array subscript is above |array subscript is above
|array bounds |array bounds
--- Comment #6 from Jeffrey A. Law <law at redhat dot com> ---
Also fixed by Richi's change for 83202 on the trunk. Will be collecting this
and other instances of the same issue for the testsuite.
>From gcc-bugs-return-584101-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 18:51:35 2017
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Subject: [Bug rtl-optimization/83272] Unnecessary mask instruction generated
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I don't believe the andl is not needed after shrb, as that is an 8-bit operand
size, it should leave the upper 56 bits of the register unmodified. And
unsigned char argument is in the ABI passed as int, so I think the upper 32
bits are undefined, which the andl instruction clears. Perhaps using shrl $4,
%edi
would be sufficient if the argument really has to be zero extended.
In your
static const char map[16] = "xyz";
void foo(unsigned char *src, char *buf)
{
int hi = src[0] / 16;
int lo = src[0] % 16;
buf[0] = map[hi];
buf[1] = map[lo];
}
testcase, I suppose we'd need to use REE to figure out something the generic
code can't know, in particular that the movzbl instruction also clears the
upper 32 bits and that shrb instruction doesn't modify the upper 32 bits.
REE sees:
(insn 7 4 21 2 (set (reg:QI 0 ax [orig:87 _1 ] [87])
(mem:QI (reg/v/f:DI 5 di [orig:94 src ] [94]) [0 *src_6(D)+0 S1 A8]))
"pr83272.c":4 88 {*movqi_internal}
(nil))
(insn 21 7 9 2 (set (reg:QI 1 dx [97])
(reg:QI 0 ax [orig:87 _1 ] [87])) "pr83272.c":4 88 {*movqi_internal}
(nil))
(insn 9 21 10 2 (parallel [
(set (reg:QI 1 dx [97])
(lshiftrt:QI (reg:QI 1 dx [97])
(const_int 4 [0x4])))
(clobber (reg:CC 17 flags))
]) "pr83272.c":4 585 {*lshrqi3_1}
(nil))
(insn 10 9 11 2 (set (reg:DI 1 dx [orig:98 hi ] [98])
(zero_extend:DI (reg:QI 1 dx [97]))) "pr83272.c":4 136
{zero_extendqidi2}
(nil))
...
(insn 15 14 16 2 (parallel [
(set (reg:DI 0 ax [orig:102 lo ] [102])
(and:DI (reg:DI 0 ax [orig:87 _1 ] [87])
(const_int 15 [0xf])))
(clobber (reg:CC 17 flags))
]) "pr83272.c":5 412 {*anddi_1}
(nil))
The & 15 in that case is a must, that is the % 16 from the source, the upper
bits can be set. And so the only thing that can be eliminated is the movzbl
insn 10, but in order to find that out we'd need to understand first that insn
7 clears upper 56 bits of the register, that insn 21 if we actually emit movl
%eax, %edx copies the low 32 bits (where from the earlier insn the upper 24
bits are cleared) and clears the high 32 bits (note if we emit instead movb
%al, %dl, then this doesn't hold, as it leaves upper 56 bits of %rdx
unmodified), and finally that insn 9 keeps upper 56 bits of %rdx unmodified and
from previous insns we have guaranteed zeros there.
In any case, this is far beyond what current REE can do ATM.
>From gcc-bugs-return-584102-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 18:58:03 2017
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Subject: [Bug fortran/82973] [8 regression] ICE in output_constant_pool_2, at varasm.c:3896 on aarch64
Date: Mon, 04 Dec 2017 18:58:00 -0000
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Wilco <wilco at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |wilco at gcc dot gnu.org
--- Comment #4 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #0)
> Trunk does with cross compiler:
>
> $ aarch64-linux-gnu-gcc
> /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/intrinsic_modulo_1.
> f90 -frounding-math -Ofast -c
> during RTL pass: final
> /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/intrinsic_modulo_1.
> f90:37:0:
>
> end program main
>
> internal compiler error: in output_constant_pool_2, at varasm.c:3896
> 0xee97bb output_constant_pool_2
> .././../gcc/varasm.c:3896
> 0xee974d output_constant_pool_2
> .././../gcc/varasm.c:3929
> 0xee9846 output_constant_pool_1
> .././../gcc/varasm.c:3997
> 0xef85d9 output_constant_pool_contents
> .././../gcc/varasm.c:4134
> 0xef9003 output_constant_pool
> .././../gcc/varasm.c:4162
> 0xef9003 assemble_end_function(tree_node*, char const*)
> .././../gcc/varasm.c:1912
> 0x8b0f3f rest_of_handle_final
> .././../gcc/final.c:4488
> 0x8b0f3f execute
> .././../gcc/final.c:4551
Well this doesn't look like a proper vector constant after cse1:
(insn 871 1529 917 122 (set (reg:V4SF 60 v28 [orig:143 vect__115.44 ] [143])
(mem/u/c:V4SF (lo_sum:DI (reg:DI 2 x2 [822])
(symbol_ref/u:DI ("*.LC3") [flags 0x2])) [0 S16
A128]){*aarch64_simd_movv4sf}
(expr_list:REG_EQUIV (const_vector:V4SF [
(mult:SF (const_double:SF 5.0e+0 [0x0.ap+3])
(const_double:SF
3.33333333333333333333333333333333333333333333333333333e-1
[0x0.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabp-1]))
(mult:SF (const_double:SF 5.0e+0 [0x0.ap+3])
(const_double:SF
-3.33333333333333333333333333333333333333333333333333333e-1
[-0x0.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabp-1]))
(const_double:SF 5.0e+0 [0x0.ap+3])
(const_double:SF -5.0e+0 [-0x0.ap+3])
])
It believes the multiply is a constant but doesn't fold it due to
-frounding-math... I can work around it in the back-end by rejecting illegal
vector constants but I think the mid-end really shouldn't create these.
>From gcc-bugs-return-584103-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 19:02:13 2017
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Subject: [Bug target/70216] [SH] Implement __builtin_trap
Date: Mon, 04 Dec 2017 19:02:00 -0000
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--- Comment #20 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Oleg Endo from comment #19)
> (In reply to John Paul Adrian Glaubitz from comment #18)
>
> > I can confirm that the patch from comment #6 resolves the problem for me.
>
> Thanks for checking.
Just for completeness sake, the patch also fixes the build of glibc with gcc-7.
So, yes, it should be merged :).
>From gcc-bugs-return-584104-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 19:09:02 2017
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Subject: [Bug c++/83271] const variable previously declared "extern" results in "weak declaration must be public" error
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That diagnostics is emitted from the attribute handling, before the decls is
merged with the previous extern const int x; decl, so it indeed isn't
TREE_PUBLIC.
So, this doesn't really look easy to fix, we'd need to postpone the weak
attribute processing until later, or look up from the attribute handling code
in the FE whether it has been defined already during the attribute processing,
or temporarily set TREE_PUBLIC bits on the constants around the generic
processing and then make sure to call it again once we can finalize it if it
isn't TREE_PUBLIC but is DECL_WEAK.
I must say I fail to see usefulness of adding the attribute to the definition
rather than declaration though.
>From gcc-bugs-return-584105-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 19:19:26 2017
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Subject: [Bug target/83252] Wrong code with "-march=skylake-avx512 -O3"
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-pc-linux-gnu
--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Dmitry Babokin from comment #9)
> And GCC bug tracker doesn't even have generic "new bugs"
> component to assign, which means people need to have secret knowledge about
> compiler internals
We can add this if needed. I think regression could be made make generic and
add a generic new bug component. We do have some very active people reading
bug reports that can re-categorize them (not to sound special but I am one of
them; note sometimes I get it wrong too).
>From gcc-bugs-return-584106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 19:32:04 2017
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Subject: [Bug target/83252] Wrong code with "-march=skylake-avx512 -O3"
Date: Mon, 04 Dec 2017 19:32:00 -0000
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--- Comment #11 from Dmitry Babokin <babokin at gmail dot com> ---
(In reply to Andrew Pinski from comment #10)
> We can add this if needed. I think regression could be made make generic
> and add a generic new bug component. We do have some very active people
> reading bug reports that can re-categorize them (not to sound special but I
> am one of them; note sometimes I get it wrong too).
Yes, in practice bugs are usually dispatched to the correct owner quite fast
(thanks for that, it really helps). So "new" category would not change much in
this sense, but it would definitely make the process more friendly and less
confusing for outsiders.
>From gcc-bugs-return-584107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 19:45:43 2017
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Subject: [Bug tree-optimization/69224] [6/7 Regression] -Warray-bounds false positive with -O3 and struct pointer parameter
Date: Mon, 04 Dec 2017 19:45:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
Summary|[6/7/8 Regression] |[6/7 Regression]
|-Warray-bounds false |-Warray-bounds false
|positive with -O3 and |positive with -O3 and
|struct pointer parameter |struct pointer parameter
--- Comment #9 from Jeffrey A. Law <law at redhat dot com> ---
Another fixed by Richi's 83202 changes.
>From gcc-bugs-return-584108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 20:11:34 2017
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Subject: [Bug fortran/83275] [PDT] ICE in get_pdt_constructor, at fortran/resolve.c:1185 (and others)
Date: Mon, 04 Dec 2017 20:11:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pault at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
I am starting to suspect that you have a distinctly perverse sense of humour
:-)
That said, finding these invalid cases that die horribly is extremely valuable.
Many thanks, I will take it.
Paul
>From gcc-bugs-return-584109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 20:11:50 2017
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Subject: [Bug bootstrap/81934] after install of 7.2.0 the libcilkrts.la has extra quote chars in it for dependency_libs
Date: Mon, 04 Dec 2017 20:11:00 -0000
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--- Comment #2 from Dennis Clarke <dclarke at blastwave dot org> ---
So then, this is a case of "wait and see" wherein any previous release of
the gcc tarballs will just continue to fail?
>From gcc-bugs-return-584110-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 20:19:02 2017
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Subject: [Bug c++/83271] const variable previously declared "extern" results in "weak declaration must be public" error
Date: Mon, 04 Dec 2017 20:19:00 -0000
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--- Comment #2 from Alexey Salmin <alexey.salmin at gmail dot com> ---
(In reply to Jakub Jelinek from comment #1)
> I must say I fail to see usefulness of adding the attribute to the
> definition rather than declaration though.
Here's my case. There's a const bool flag in a static library that should be
reliably available before the main() entry point, therefore the static
initialization is used (see C++11 3.6.2.2). By default the flag is set to true
but it's overridden to false in a custom build.
flag.h:
extern const bool flag;
enabled.cpp:
#include "flag.h"
const bool flag __attribute__((weak)) = true;
disabled.cpp:
#include "flag.h"
const bool flag = false; // strong override
Library behaves differently depending on whether the "disabled.o" was provided
to the linker or not, while the "enabled.o" is always ar-ed into the static
library. I include the same header file in both cpp files to make sure both
definitions correspond to the same declaration.
Let me know if there's a better way to achieve this behavior. The one I can
think of involves a macro and two different builds of the library but it's not
welcome in our build system. Another option would be to keep both "enabled.o"
and "disabled.o" out of the static library and don't use weak symbols at all,
but that breaks the compatibility.
>From gcc-bugs-return-584112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 20:21:56 2017
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Subject: [Bug c++/83271] const variable previously declared "extern" results in "weak declaration must be public" error
Date: Mon, 04 Dec 2017 20:21:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
At least there's a simple workaround (adding 'extern' to the definition where
the attribute).
>From gcc-bugs-return-584111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 20:21:29 2017
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Subject: [Bug c++/83273] if constexpr does not fail with run-time conditions
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-04
Ever confirmed|0 |1
>From gcc-bugs-return-584113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 20:30:42 2017
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Subject: [Bug preprocessor/61638] "warning: multi-line comment" unclear and has false positives
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2014-10-05 00:00:00 |2017-12-4
Severity|enhancement |normal
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The warning is even emitted when the backslash isn't the last character before
the newline, so you can't add whitespace to your ascii art to shut the warning
up.
Clang doesn't warn when the next line is also a comment (as Zack requests) and
has a separate -Wbackslash-newline-escape warning for the case where there's
whitespace between the backslash and the newline. That seems much more useful.
>From gcc-bugs-return-584114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 20:31:07 2017
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(Changed from "enhancement" to "normal" because the current behaviour is just
bad)
>From gcc-bugs-return-584115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 20:38:04 2017
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Subject: [Bug preprocessor/61638] "warning: multi-line comment" unclear and has false positives
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And you also can't use #pragma GCC diagnostic ignored "-Wcomment" to silence
it.
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Subject: [Bug c++/83273] if constexpr does not fail with run-time conditions
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-584117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 20:43:26 2017
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Subject: [Bug c++/83271] const variable previously declared "extern" results in "weak declaration must be public" error
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--- Comment #4 from Alexey Salmin <alexey.salmin at gmail dot com> ---
(In reply to Jonathan Wakely from comment #3)
> At least there's a simple workaround (adding 'extern' to the definition
> where the attribute).
That's what we do, so this is really a minor bug. Still, I decided to report it
for a few reasons:
1) Current g++ behavior looks inconsistent
2) clang++ and icc handle this case correctly
3) I'm used to a practice where declarations has the "extern" specifier while
definitions don't. This matters when you rely on the zero-initialization which
I normally don't do, but this pattern is somehow stuck in my head
>From gcc-bugs-return-584118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 20:48:51 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83278] New: missing -Wformat-overflow for an inlined __builtin___sprintf_chk with a local buffer
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Bug ID: 83278
Summary: missing -Wformat-overflow for an inlined
__builtin___sprintf_chk with a local buffer
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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The example below shows a inconsistency in the compile-time detection of
overflowing calls to strcpy. The first call (in f()) is detected, the second
one (in g()) results in a duplicate warning, and third one (in h()) is not
detected.
$ cat d.c && gcc -O2 -S -Wall d.c
void sink (char*);
void f (const char *s)
{
char a[3];
__builtin_sprintf (a, "%s", s); // warning (good)
sink (a);
}
void call_f (void)
{
f ("12345");
}
char a[3];
void g (const char *s)
{
__builtin___sprintf_chk (a, 1, // duplicate warning
__builtin_object_size (a, 1), "%s", s);
}
void call_g (void)
{
g ("123456");
}
void h (const char *s)
{
char a[3];
__builtin___sprintf_chk (a, 1, // missing warning (bug)
__builtin_object_size (a, 1), "%s", s);
sink (a);
}
void call_h (void)
{
h ("1234567");
}
d.c: In function ‘call_f’:
d.c:7:26: warning: ‘%s’ directive writing 5 bytes into a region of size 3
[-Wformat-overflow=]
__builtin_sprintf (a, "%s", s); // warning (good)
^~
d.c:14:6:
f ("12345");
~~~~~~~
d.c:7:3: note: ‘__builtin_sprintf’ output 6 bytes into a destination of size 3
__builtin_sprintf (a, "%s", s); // warning (good)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
d.c: In function ‘call_g’:
d.c:22:60: warning: ‘%s’ directive writing 6 bytes into a region of size 3
[-Wformat-overflow=]
__builtin_object_size (a, 1), "%s", s);
^~
d.c:27:6:
g ("123456");
~~~~~~~~
d.c:21:3: note: ‘__builtin___sprintf_chk’ output 7 bytes into a destination of
size 3
__builtin___sprintf_chk (a, 1, // duplicate warning
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
__builtin_object_size (a, 1), "%s", s);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function ‘g’,
inlined from ‘call_g’ at d.c:27:3:
d.c:21:3: warning: ‘__builtin___sprintf_chk’ writing 7 bytes into a region of
size 3 overflows the destination [-Wstringop-overflow=]
>From gcc-bugs-return-584119-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 20:54:24 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83278] missing -Wformat-overflow for an inlined __builtin___sprintf_chk with a local buffer
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=80074
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
See also bug 80074, though that one is about not warning without optimization.
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Subject: [Bug tree-optimization/81165] [8 Regression] Regression in GCC-8.0.0's optimizer
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--- Comment #11 from rguenther at suse dot de <rguenther at suse dot de> ---
On December 4, 2017 6:55:02 PM GMT+01:00, law at redhat dot com
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81165
>
>Jeffrey A. Law <law at redhat dot com> changed:
>
> What |Removed |Added
>----------------------------------------------------------------------------
> CC| |law at redhat dot com
>
>--- Comment #10 from Jeffrey A. Law <law at redhat dot com> ---
>WRT c#9. Precisely. There's just one too many statements in the block
>for the
>threader to think it's profitable to clone the block.
>
>I've long wanted to have some kind of indication of how many statements
>are
>going to be eliminated by jump threading within the duplicated block so
>that we
>didn't have to be so pessimistic. There's at least one more BZ in the
>regression list which touches on this issue. Here's the block in
>question:
>
> # t0_36 = PHI <-1(3), 0(2)>
> # t1_37 = PHI <t1_31(3), 2(2)>
> # prephitmp_18 = PHI <_17(3), 0(2)>
> # prephitmp_19 = PHI <_9(3), 2(2)>
> # VUSE <.MEM_28>
> x0.3_41 = x0;
> _42 = (int) x0.3_41;
> _43 = 29 % _42;
> _44 = _43 & 25;
> _45 = (long unsigned int) _44;
> _46 = _45 * 10;
> _47 = 128 % _46;
> _48 = (char) _47;
> _49 = (unsigned int) _48;
> _50 = prephitmp_18 + _49;
> _51 = (int) _50;
> if (_51 < 0)
> goto <bb 4>; [85.00%]
> else
> goto <bb 7>; [15.00%]
>
>
>Essentially starting at the control statement, we could realize that
>_51 is a
>single use SSA_NAME. So if we thread, it's defining statement will go
>away, so
>we don't need to count it. THen we look at its operand(s). _50. _50
>is
>single use as well, so its defining statement will go away. And so-on
>until we
>hit the start of the block. We can then use that information to get a
>much
>better estimation of the codesize cost of cloning the block.
>
>Alex, want to take a stab at it?
Also PHI nodes which are all single argument after threading shouldn't really
count as we can propagate them away.
Loop unrolling has crude heuristics to estimate stmts eliminated by constant
propagation, sth to look at as well. And then there's the possibility to simply
run DOM on the path and instead of modifying the original code emit copies in a
new sequence, costing, copying and optimizing in one go. If it gets too
expensive simply throw the sequence away.
Richard.
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Subject: [Bug libstdc++/83279] New: std::experimental::filesystem::copy_file can't copy larger files than 2.0GiB
Date: Mon, 04 Dec 2017 21:21:00 -0000
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Bug ID: 83279
Summary: std::experimental::filesystem::copy_file can't copy
larger files than 2.0GiB
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
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GCC-version: 7.2.0
System: KDE neon (based on Ubuntu 16.04 LTS) x64, x86_64-linux-gnu
GCC-configuration-options: --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu --enable-checking=release --enable-languages=c,c++
--program-suffix=-7.2 --disable-multilib --prefix=/opt/gcc-7.2.0
compile line: g++ -std=c++17 *.cpp *.h -lstdc++fs
thrown exception: filesystem error: cannot copy file: No such file or directory
[/path/to/sourcefile] [/path/to/destinationfile]
preprocessed file: see attachment
detailed description:
The function std::experimental::filesystem::copy_file is not able to copy any
file larger than 2.0GiB (2147483647 Bytes). If you try this, the mentioned
exception will be thrown after 2.0GiB of an >2.0GiB-file were copied - so that
the copy process is canceled and the copied file is incomplete.
I could reproduce this behavior in more than one program by simply using
std::experimental::filesystem::copy.
However, when I compiled it with GCC 5.4.0 (g++ -std=c++14 *.cpp *.h
-lstdc++fs) everything works fine and I can copy files with a size of over
2.0GiB.
I am sorry for any English mistakes.
Please contact me if there are any open questions.
>From gcc-bugs-return-584122-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 21:47:26 2017
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Subject: [Bug c++/83268] internal compiler error: in lambda_expr_this_capture, at cp/lambda.c:785
Date: Mon, 04 Dec 2017 21:47:00 -0000
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Works in trunk.
>From gcc-bugs-return-584123-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 22:29:41 2017
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Subject: [Bug middle-end/81897] [6/7/8 Regression] spurious -Wmaybe-uninitialized warning
Date: Mon, 04 Dec 2017 22:29:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aldyh at redhat dot com,
| |law at redhat dot com
--- Comment #3 from Jeffrey A. Law <law at redhat dot com> ---
So this really doesn't have anything to do with locking, mutexes or anything
like that. It's really just a matter of the CFG having a shape that is
problematical for the old jump threader.
To thread the CFG (and thus allow proving the uninitialized use is properly
guarded) requires iterating jump threading. That's something we decided years
ago to stop doing due to the compilation cost.
Aldy is working on improvements to the newer backwards jump threader which will
give it a fighting chance to address this problem. The biggest worry there
will be the amount of block copying that will be necessary to expose the flow
of the known value of fibmatch through all the paths between the two
conditionals.
An alternate solution would be to enhance the predicate analysis that is used
to prune uninit warnings in tree-ssa-uninit.c. Fixing the threader is strongly
preferred because threading the jumps ultimately reduces the amount of runtime
branching the code does as opposed to just avoiding the warning.
I'm cc-ing Aldy just in case he wants to peek and see if his work does capture
the jump thread in this BZ or if he wants to dig into tree-ssa-uninit.c again
:-)
>From gcc-bugs-return-584124-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 22:31:33 2017
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Subject: [Bug rtl-optimization/83272] Unnecessary mask instruction generated
Date: Mon, 04 Dec 2017 22:31:00 -0000
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--- Comment #2 from Mason <slash.tmp at free dot fr> ---
(In reply to Jakub Jelinek from comment #1)
> I don't believe the andl is not needed after shrb, as that is an 8-bit
> operand size, it should leave the upper 56 bits of the register unmodified.
> And unsigned char argument is in the ABI passed as int, so I think the upper
> 32 bits are undefined, which the andl instruction clears.
I checked the amd64 SysV ABI, and didn't see a requirement for a function
returning an INTEGER type smaller than 64 bits to clear the upper bits?
(The caller knows what bits are valid.)
Anyway, I may have oversimplified the testcase. Consider this one:
char foo(unsigned char *p)
{
static const char map[16] = "wxyz";
return map[*p / 16];
}
foo:
movzbl (%rdi), %eax
shrb $4, %al
andl $15, %eax
movzbl map.2295(%rax), %eax
ret
movzbl does all bits of RAX.
shrb discards 4 of the 8 bits, leaving only 4.
Thus, andl is a no-op in that case.
>From gcc-bugs-return-584125-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 22:34:44 2017
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Subject: [Bug c++/83280] New: gcc doesn't realize a returning value from complete switch(enum...) does return a value
Date: Mon, 04 Dec 2017 22:34:00 -0000
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Bug ID: 83280
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switch(enum...) does return a value
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Given this file:
===========
enum class e { a, b, c};
int converter (e val);
int converter (e val) {
switch (val) {
case e::a: return 0;
case e::b: return 1;
case e::c: return 2;
}
}
===========
g++ 7.2 doesn't realize this function always returns correctly:
$ g++-7 -Wswitch -Wreturn-type -std=c++11 -c enum-problem.cc
enum-problem.cc: In function 'int converter(e)':
enum-problem.cc:13:1: warning: control reaches end of non-void function
[-Wreturn-type]
}
^
$
>From gcc-bugs-return-584126-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 22:51:32 2017
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Subject: [Bug middle-end/82123] [7/8 regression] spurious -Wformat-overflow warning for converted vars
Date: Mon, 04 Dec 2017 22:51:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
Assignee|unassigned at gcc dot gnu.org |law at redhat dot com
--- Comment #3 from Jeffrey A. Law <law at redhat dot com> ---
So the core bits of the embeddable range analyzer have landed. I've just
updated (locally) my bits to use that in the sprintf warnings and they do
indeed fix this problem. Let me finish beating those into shape.
>From gcc-bugs-return-584127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 22:52:43 2017
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Subject: [Bug c++/83273] if constexpr does not fail with run-time conditions
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Dec 4 22:52:07 2017
New Revision: 255390
URL: https://gcc.gnu.org/viewcvs?rev=255390&root=gcc&view=rev
Log:
PR c++/83273 - constexpr if allows non-constant condition
* semantics.c (finish_if_stmt_cond): Use require_constant_expression
rather than is_constant_expression.
* constexpr.c (potential_constant_expression_1) [LAMBDA_EXPR]: Allow
in C++17.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/constexpr-if13.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/cp/semantics.c
trunk/gcc/testsuite/g++.dg/cpp1z/constexpr-if12.C
>From gcc-bugs-return-584128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 22:57:36 2017
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Subject: [Bug c++/83280] gcc doesn't realize a returning value from complete switch(enum...) does return a value
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
No, GCC is correct. If you call converter((e)3) the function fails to return.
>From gcc-bugs-return-584129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 23:06:17 2017
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Subject: [Bug c++/83273] if constexpr does not fail with run-time conditions
Date: Mon, 04 Dec 2017 23:06:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-584130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 23:09:00 2017
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Subject: [Bug preprocessor/61638] "warning: multi-line comment" unclear and has false positives
Date: Mon, 04 Dec 2017 23:09:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon Dec 4 23:08:22 2017
New Revision: 255392
URL: https://gcc.gnu.org/viewcvs?rev=255392&root=gcc&view=rev
Log:
Fix warnings in <bits/regex_compiler.tcc>
* include/bits/regex_compiler.tcc: Use C-style comment to work around
PR preprocessor/61638.
(__INSERT_REGEX_MATCHER): Replace GNU extension with __VA_ARGS__.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/regex_compiler.tcc
>From gcc-bugs-return-584131-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 23:12:27 2017
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Subject: [Bug libstdc++/83279] std::experimental::filesystem::copy_file can't copy larger files than 2.0GiB
Date: Mon, 04 Dec 2017 23:12:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to T B from comment #0)
> However, when I compiled it with GCC 5.4.0 (g++ -std=c++14 *.cpp *.h
> -lstdc++fs) everything works fine and I can copy files with a size of over
> 2.0GiB.
That's strange, because the code for copy_file is identical.
>From gcc-bugs-return-584132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 23:38:56 2017
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Subject: [Bug middle-end/81876] [7/8 Regression] bogus -Wstrict-overflow warning with -O3
Date: Mon, 04 Dec 2017 23:38:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #2 from Jeffrey A. Law <law at redhat dot com> ---
I'm a bit unsure how you want to proceed here Richi.
Marc's changes to move key folding patterns from fold-const.c into match.pd
means the x + 1 > x -> 1 simplification happens earlier/more often. So the
problematical sequence gets wiped out by VRP2. That's probably a good thing.
However, that bit of match.pd does not warn when it makes that assumption.
One could argue it should. Of course if it warns, then we end up in situations
like this BZ where the warning spit out by GCC bears no resemblance to the
actual source code because of ldist or other significant code transformations.
So I could make an argument to drop the 8 from the regression marker. I could
make an argument we should open a new BZ for the missed warning and/or a BZ for
getting the code coming out of ldist sane.
Thoughts?
>From gcc-bugs-return-584133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 23:43:25 2017
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Subject: [Bug driver/80271] Support environment variable CLICOLOR_FORCE to enable -fdiagnostics-color
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Tyler Mace <macetw at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |macetw at gmail dot com
--- Comment #3 from Tyler Mace <macetw at gmail dot com> ---
This makes a ton of sense. gcc is typically used alongside other tools like
cmake, googletest, clang (maybe), and other tools are using that specific
environment variable.
Let me put it this way:
As a build engineer, I want to minimize the steps to set up this kind of
environment within an automation framework like Jenkins (and the Ansicolor
plugin), so that I can see colorized output without digging into each tool that
needs command arguments.
>From gcc-bugs-return-584134-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 23:50:43 2017
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Subject: [Bug testsuite/83281] New: [8 regression] libgomp.oacc-c-c++-common/reduction-cplx-flt.c and reduction-cplx-dbl.c fail starting with r255335
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Bug ID: 83281
Summary: [8 regression]
libgomp.oacc-c-c++-common/reduction-cplx-flt.c and
reduction-cplx-dbl.c fail starting with r255335
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Given the description of the revision do the test cases just need updating?
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-trunk/gcc/xgcc
-B/home/seurer/gcc/build/gcc-trunk/gcc/ -x c++
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c
-B/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libgomp/
-B/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libgomp/.libs
-I/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libgomp
-I/home/seurer/gcc/gcc-trunk/libgomp/testsuite/../../include
-I/home/seurer/gcc/gcc-trunk/libgomp/testsuite/.. -fmessage-length=0
-fno-diagnostics-show-caret -Wno-hsa -fdiagnostics-color=never -fopenacc
-DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -O2 -nostdinc++
-I/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/powerpc64le-unknown-linux-gnu
-I/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/gcc-trunk/libstdc++-v3/libsupc++
-I/home/seurer/gcc/gcc-trunk/libstdc++-v3/include/backward
-I/home/seurer/gcc/gcc-trunk/libstdc++-v3/testsuite/util
-B/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libgomp/../libstdc++-v3/src/.libs
-L/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libgomp/.libs
-L/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/./libgomp/../libstdc++-v3/src/.libs
-lstdc++ -lm -o ./reduction-cplx-dbl.exe
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:
In function 'int main()':
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:31:
error: unable to find numeric literal operator 'operator""i'
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:31:
note: add 'using namespace std::complex_literals' (from <complex>) to enable
the C++14 user-defined literal suffixes
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:31:
note: or use 'j' instead of 'i' for the GNU built-in suffix
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:38:
error: unable to find numeric literal operator 'operator""i'
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:38:
note: add 'using namespace std::complex_literals' (from <complex>) to enable
the C++14 user-defined literal suffixes
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:38:
note: or use 'j' instead of 'i' for the GNU built-in suffix
compiler exited with status 1
output is:
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:
In function 'int main()':
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:31:
error: unable to find numeric literal operator 'operator""i'
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:31:
note: add 'using namespace std::complex_literals' (from <complex>) to enable
the C++14 user-defined literal suffixes
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:31:
note: or use 'j' instead of 'i' for the GNU built-in suffix
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:38:
error: unable to find numeric literal operator 'operator""i'
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:38:
note: add 'using namespace std::complex_literals' (from <complex>) to enable
the C++14 user-defined literal suffixes
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:38:
note: or use 'j' instead of 'i' for the GNU built-in suffix
FAIL: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c
-DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -O2 (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:31:
error: unable to find numeric literal operator 'operator""i'
/home/seurer/gcc/gcc-trunk/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c:102:38:
error: unable to find numeric literal operator 'operator""i'
>From gcc-bugs-return-584135-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 23:53:53 2017
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80271
--- Comment #4 from Tyler Mace <macetw at gmail dot com> ---
The argument against environment variables doesn't make sense, when the
GCC_COLORS environment variables are used right within this feature.
>From gcc-bugs-return-584136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 04 23:59:51 2017
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Mon, 04 Dec 2017 23:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81616
--- Comment #37 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Mon Dec 4 23:59:11 2017
New Revision: 255395
URL: https://gcc.gnu.org/viewcvs?rev=255395&root=gcc&view=rev
Log:
PR target/81616
* athlon.md: Disable for generic.
* haswell.md: Enable for generic.
* i386.c (ix86_sched_init_global): Add core hooks for generic.
* x86-tune-sched.c (ix86_issue_rate): Increase issue rate for generic
to 4.
(ix86_adjust_cost): Move generic to haswell path.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/athlon.md
trunk/gcc/config/i386/haswell.md
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/x86-tune-sched.c
>From gcc-bugs-return-584137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 00:24:59 2017
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/83239] False positive from -Wstringop-overflow on simple std::vector code
Date: Tue, 05 Dec 2017 00:24:00 -0000
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--- Comment #5 from Jeffrey A. Law <law at redhat dot com> ---
This (and pr80641) all feel closely related. Transforming into a trap early
means we're not likely to get these reports which would be unfortunate because
they often point to a failing of the optimizer.
I think we should start by figuring out why VRP didn't help us here. From
looking at the stuff we've got so far, I'd focus on:
;; basic block 13, loop depth 1, count 357916946 (estimated locally), maybe
hot
;; prev block 12, next block 14, flags: (NEW, REACHABLE, VISITED)
;; pred: 3 [50.0% (guessed)] count:357916948 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
_117 = ASSERT_EXPR <_17, _17 > 2>;
_1 = _117 + 18446744073709551614;
if (_1 > _117)
goto <bb 14>; [33.00%]
else
goto <bb 28>; [67.00%]
;; basic block 14, loop depth 1, count 59056296 (estimated locally), maybe
hot
;; Invalid sum of incoming counts 118112592 (estimated locally), should be
59056296 (estimated locally)
;; prev block 13, next block 15, flags: (NEW, REACHABLE, VISITED)
;; pred: 13 [33.0% (guessed)] count:118112592 (estimated locally)
(TRUE_VALUE,EXECUTABLE)
_185 = ASSERT_EXPR <_1, _1 > _117>;
_184 = ASSERT_EXPR <_185, _185 > 18446744073709551613>;
_152 = ASSERT_EXPR <_117, _117 < _184>;
_40 = ASSERT_EXPR <_152, _152 <= 1>;
_83 = a$16_134 - a$8_73;
_84 = _83 /[ex] 4;
_85 = (long unsigned int) _84;
if (_85 > 18446744073709551613)
goto <bb 15>; [67.00%]
else
goto <bb 16>; [33.00%]
;; succ: 15 [67.0% (guessed)] count:39567718 (estimated locally)
(TRUE_VALUE,EXECUTABLE)
;; 16 [33.0% (guessed)] count:19488578 (estimated locally)
(FALSE_VALUE,EXECUTABLE)
The biggest problem I see is we don't know the relationship between a$16_134
and a$8_73 in BB14. In fact we know nothing about a$16_134 at that point. So
I don't see any way to simplify the conditional at the end of BB14.
The conditional at the end of BB12 is an overflow check. But we're dealing
with unsigned types, so we can't rule out overflow. But even knowing what
direction it took doesn't help us. So we can't simplify/eliminate it nor use
its direction to help.
Note this differs from 79095 because in 79095 we had information about the
relationship between the two key pointers -- namely we knew they were not the
same. That allowed us to determine their difference was nonzero and the result
of the exact division had to be nonzero as well. All that played into being
able to eventually prove the path leading to the problem memset was not
executable.
I don't see anything in this BZ that would allow us to make the same
determination here.
>From gcc-bugs-return-584138-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 00:38:22 2017
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Subject: [Bug tree-optimization/82103] spurious stringop-overflow warning
Date: Tue, 05 Dec 2017 00:38:00 -0000
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--- Comment #4 from Jeffrey A. Law <law at redhat dot com> ---
IMHO the warning is correct here. The code clearly does very bad things when
frame is zero. In that case we pass -1 to the memset #define. Which
ultimately results in the insane memset arguments.
This is *precisely* the kinds of things we want to be warning about.
>From gcc-bugs-return-584139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 00:46:21 2017
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Subject: [Bug tree-optimization/82646] bogus -Wstringop-overflow with -D_FORTIFY_SOURCE=2 on strncpy with range to a member array
Date: Tue, 05 Dec 2017 00:46:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #1 from Jeffrey A. Law <law at redhat dot com> ---
This test looks bogus to me.
"g" boils down to:
g (struct S * p, int n)
{
long unsigned int _1;
char[5] * _2;
;; basic block 2, loop depth 0, count 1073741825 (estimated locally), maybe
hot
;; prev block 0, next block 1, flags: (NEW, REACHABLE, VISITED)
;; pred: ENTRY [always] count:1073741826 (estimated locally)
(FALLTHRU,EXECUTABLE)
n_7 = MAX_EXPR <n_4(D), 5>;
_1 = (long unsigned int) n_7;
_2 = &p_5(D)->a;
__builtin___strncpy_chk (_2, "1234567", _1, 5);
sink (_2);
return;
;; succ: EXIT [always (guessed)] count:1073741825 (estimated locally)
(EXECUTABLE)
}
We can pretty easily see that _1 can exceed "7" and thus we could do an
out-of-bounds write. THe fact that it doesn't is because main passes in the
value of 1. MAX (1, 5) is 5, thus no runtime failure. Pass in a large value
to g and you'll get a nice runtime failure.
>From gcc-bugs-return-584140-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 00:48:57 2017
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/82076] inconsistencies between sanitizer and -Wstringop-overflow
Date: Tue, 05 Dec 2017 00:48:00 -0000
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--- Comment #2 from Jeffrey A. Law <law at redhat dot com> ---
Yea, I think it's inevitable that sanitizer-instrumented code is likely to run
afoul of various warnings. Using the sanitizers disables certain
optimizations. Optimizations that often we rely on to get accurate warnings.
I think we should ultimately consider this NOTABUG.
>From gcc-bugs-return-584141-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 01:17:52 2017
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From: "urbanjost at comcast dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83282] New: missing comma in format changes output
Date: Tue, 05 Dec 2017 01:17:00 -0000
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Bug ID: 83282
Summary: missing comma in format changes output
Product: gcc
Version: 6.4.0
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Priority: P3
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I (accidently) used a GNU/gfortran extension, leaving a comma out
of a format. The output changed unexpectedly. The description of
the extension seems to indicate that the behavior should be the same
whether the comma is present or not. The code produces the following
output
[a ][bb ][ccc ][dddd ]
[a [bb [ccc [dddd
[a [bb [ccc [dddd
The only difference between the three formats is that the first one
has commas between the edit descriptors, some of which are removed in
the other two formats ...
program missing_comma
implicit none
! A missing comma in a format changes output
character(len=*),parameter :: array(*)=[character(len=5) ::
'a','bb','ccc','dddd']
write(*,'(*("[",a,"]":))')array ! with commas
! next, using GNU extension to leave out commas in format
write(*,'(*("[",a"]":))')array
write(*,'(*("["a"]":))')array
end program missing_comma
This is personally a low-priority issue, but might cause significant problems
for pre-f90 code where the lack of commas in format descriptors is common.
>From gcc-bugs-return-584142-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 01:32:16 2017
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From: "lukas.lorimer at snowflake dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83283] New: Casting from boolean to unsigned char to enum returns incorrect results
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Bug ID: 83283
Summary: Casting from boolean to unsigned char to enum returns
incorrect results
Product: gcc
Version: 7.2.1
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Hello, it appears casting from boolean to unsigned char then to an enum returns
incorrect results when the operation is vectorized. Below is a minimized
example.
* Removing the typedef and including `cstdint` also triggers the bug.
* Running it with `-fsanitize=undefined` does not produce any warnings (but
does stop the bug from occurring).
* This appears to be a regression since g++ 6.2.1.
// START main.ii
# 1 "main.cpp"
# 1 "/tmp/a//"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "main.cpp"
typedef unsigned char uint8_t;
enum EN : uint8_t {
X = 0,
Y = 1
};
void __attribute__((noinline)) fn(EN *v, int size) {
for (int i = 0; i < size; ++i) {
const bool b = (v[i] == EN::Y);
v[i] = static_cast<EN>(static_cast<uint8_t>(b));
}
}
int main() {
constexpr int items = 32;
EN vals[items] = {X};
vals[3] = Y;
fn(vals, items);
return vals[3];
}
// END main.ii
$ g++72 -g -O1 -ftree-loop-vectorize -Wall -Wextra main.cpp
# No output
$ ./a.out; echo $?
# Expected output: 1
255
$ g++72 -v
Using built-in specs.
COLLECT_GCC=/usr/local/bin/g++72
COLLECT_LTO_WRAPPER=/opt/rh/devtoolset-7/root/usr/libexec/gcc/x86_64-redhat-linux/7/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap
--enable-languages=c,c++,fortran,lto --prefix=/opt/rh/devtoolset-7/root/usr
--mandir=/opt/rh/devtoolset-7/root/usr/share/man
--infodir=/opt/rh/devtoolset-7/root/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared
--enable-threads=posix --enable-checking=release --enable-multilib
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-gcc-major-version-only --enable-plugin --with-linker-hash-style=gnu
--enable-initfini-array --with-default-libstdcxx-abi=gcc4-compatible
--with-isl=/builddir/build/BUILD/gcc-7.2.1-20170829/obj-x86_64-redhat-linux/isl-install
--enable-libmpx
--with-mpc=/builddir/build/BUILD/gcc-7.2.1-20170829/obj-x86_64-redhat-linux/mpc-install
--with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 7.2.1 20170829 (Red Hat 7.2.1-1) (GCC)
The behaviour is correct if one uses:
const uint8_t b = (v[i] == EN::Y);
It appears the difference between the two is a single pand instruction which
applies a mask to the result of some vectorized operations.
>From gcc-bugs-return-584143-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 01:38:31 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83283] [7/8 Regression] Casting from boolean to unsigned char to enum returns incorrect results
Date: Tue, 05 Dec 2017 01:38:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Component|c++ |tree-optimization
Known to work| |6.2.1
Target Milestone|--- |7.3
Summary|Casting from boolean to |[7/8 Regression] Casting
|unsigned char to enum |from boolean to unsigned
|returns incorrect results |char to enum returns
| |incorrect results
>From gcc-bugs-return-584144-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 02:21:41 2017
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Subject: [Bug bootstrap/83284] New: bootstrap comparison failure in libiberty/stack-limit.o
Date: Tue, 05 Dec 2017 02:21:00 -0000
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Bug ID: 83284
Summary: bootstrap comparison failure in
libiberty/stack-limit.o
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: build
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: egallager at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-apple-darwin10
Target: x86_64-apple-darwin10
Build: x86_64-apple-darwin10
On darwin10 I get this failure:
Comparing stages 2 and 3
warning: gcc/cc1obj-checksum.o differs
warning: gcc/cc1objplus-checksum.o differs
Bootstrap comparison failure!
libiberty/pic/stack-limit.o differs
libiberty/stack-limit.o differs
make[2]: *** [compare] Error 1
make[1]: *** [stage3-bubble] Error 2
make: *** [all] Error 2
I'm building as of SVN r255380.
My configure flags:
../configure --disable-werror --disable-werror-always
--enable-stage1-checking=release,rtl -C --with-system-libunwind
--enable-secureplt --enable-frame-pointer --enable-debug --without-isl
--disable-host-shared --enable-maintainer-mode --disable-default-pie
--with-ld64 --without-pic --enable-target-optspace --disable-nls
--with-system-zlib --with-libiconv-prefix=/opt/local --with-gmp=/opt/local
--with-mpfr=/opt/local --with-mpc=/opt/local --enable-lto
--with-build-config=bootstrap-debug --with-as=/opt/local/bin/as
--with-ld=/opt/local/bin/ld --with-ar=/opt/local/bin/ar --enable-objc-gc
--enable-libada --enable-libssp --disable-libsanitizer CC=/usr/local/bin/gcc
CXX=/usr/local/bin/g++ AR_FOR_TARGET=/opt/local/bin/ar
AS_FOR_TARGET=/opt/local/bin/as LD_FOR_TARGET=/opt/local/bin/ld
NM_FOR_TARGET=/opt/local/bin/nm RANLIB_FOR_TARGET=/opt/local/bin/ranlib
STRIP_FOR_TARGET=/opt/local/bin/strip OTOOL=/opt/local/bin/otool
OTOOL64=/opt/local/bin/otool AUTOCONF=/opt/local/bin/autoconf264
AUTOHEADER=/opt/local/bin/autoheader264 AUTOM4TE=/opt/local/bin/autom4te264
AUTORECONF=/opt/local/bin/autoreconf264 AUTOSCAN=/opt/local/bin/autoscan264
AUTOUPDATE=/opt/local/bin/autoupdate264 IFNAMES=/opt/local/bin/ifnames264
ACLOCAL=/sw/bin/aclocal-1.11 PERL=/opt/local/bin/perl M4=/opt/local/bin/gm4
--enable-languages=c,c++,lto,objc,obj-c++ --no-create --no-recursion
cmp -b says:
$ cmp -b stage2-libiberty/stack-limit.o stage3-libiberty/stack-limit.o
stage2-libiberty/stack-limit.o stage3-libiberty/stack-limit.o differ: byte 21,
line 1 is 50 ( 4 ^D
$
>From gcc-bugs-return-584145-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 02:56:34 2017
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Subject: [Bug c++/83273] if constexpr does not fail with run-time conditions
Date: Tue, 05 Dec 2017 02:56:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
.
>From gcc-bugs-return-584146-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 03:14:37 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82646] bogus -Wstringop-overflow with -D_FORTIFY_SOURCE=2 on strncpy with range to a member array
Date: Tue, 05 Dec 2017 03:14:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |ASSIGNED
Last reconfirmed| |2017-12-05
Resolution|INVALID |---
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
This is my bad for letting these bugs sit so long without fixing them.
-Wstringop-overflow is meant to warn only for provable overflow. In g(), the
overflow is possible but not inevitable. The only call to the function in the
program is with an argument that guarantees the overflow doesn't happen, and so
the warning should not be issued.
The bug here is in the maybe_emit_chk_warning() function in builtins.c called
to handle __builtin___strncpy_chk. The function passes the strncpy() bound as
the maxlen argument to check_sizes() when it should pass it as the size
argument analogously to the check_strncpy_sizes() function called for
__builtin_strncpy.
The following patch fixes the problem. Let me run the full regression test
suite and submit it.
diff --git a/gcc/builtins.c b/gcc/builtins.c
index 097e1b7..3278c7f 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -9862,6 +9862,8 @@ maybe_emit_chk_warning (tree exp, enum built_in_function
fcode)
(such as __strcat_chk). */
tree maxlen = NULL_TREE;
+ tree count = NULL_TREE;
+
switch (fcode)
{
case BUILT_IN_STRCPY_CHK:
@@ -9888,7 +9890,7 @@ maybe_emit_chk_warning (tree exp, enum built_in_function
fcode)
case BUILT_IN_STRNCPY_CHK:
case BUILT_IN_STPNCPY_CHK:
srcstr = CALL_EXPR_ARG (exp, 1);
- maxlen = CALL_EXPR_ARG (exp, 2);
+ count = CALL_EXPR_ARG (exp, 2);
objsize = CALL_EXPR_ARG (exp, 3);
break;
@@ -9911,7 +9913,7 @@ maybe_emit_chk_warning (tree exp, enum built_in_function
fcode)
}
check_sizes (OPT_Wstringop_overflow_, exp,
- /*size=*/NULL_TREE, maxlen, srcstr, objsize);
+ count, maxlen, srcstr, objsize);
}
/* Emit warning if a buffer overflow is detected at compile time
>From gcc-bugs-return-584147-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 03:15:57 2017
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From: "peter at cordes dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83285] New: non-atomic stores can reorder more aggressively with seq_cst on AArch64 than x86: missed x86 optimization?
Date: Tue, 05 Dec 2017 03:15:00 -0000
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Bug ID: 83285
Summary: non-atomic stores can reorder more aggressively with
seq_cst on AArch64 than x86: missed x86 optimization?
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
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This is either an x86-64 missed optimization or an AArch64 bug. I *think*
x86-64 missed optimization, but it's not-a-bug on AArch64 only because any
observers that could tell the difference would have data race UB.
#include <atomic>
// int na;
// std::atomic_int sync;
void seq_cst(int &na, std::atomic_int &sync) {
na = 1;
sync = 2;
na = 3;
}
https://godbolt.org/g/bUwZaM
On x86, all 3 stores are there in the asm in source order (for mo_seq_cst, but
not for mo_release).
On AArch64, gcc6.3 does does sync=2; na=3; If `na` was using relaxed atomic
stores, this would be a bug (because a thread that saw `sync==2` could then see
the original value of na, not na==1 or na==3).
But for non-atomic na, reading na even after Synchronizing With the `sync=2`
(with an acquire load) would be UB, because the thread that writes sync writes
na again *after* that. It seems that gcc's AArch64 backend is using this as
license to sink the na=1 store past the sync=2 and merge it with the na=3.
seq_cst(int&, std::atomic<int>&, std::atomic<int>&):
mov w2, 2 // tmp79,
stlr w2, [x1] // tmp79,* sync
mov w1, 3 // tmp78,
str w1, [x0] // tmp78, *na_2(D)
ret
-----
If sync=2 is a release store (not seq_cst), then gcc for x86 does sink the na=1
past the release and merge. (See the godbolt link.) In this case it's also
allowed to hoist the na=3 store ahead of the release, because plain release is
only a one-way barrier for earlier stores. That would be safe for
relaxed-atomic as well (unlike for non-atomic), but gcc doesn't do that.
I'm slightly worried that this is unintentional and could maybe happen for
relaxed atomics when it would be illegal. (On AArch64 with seq_cst or release,
and on x86 only with release.)
But hopefully this is just gcc being clever and taking advantage of the fact
that writing a non-atomic after a possible synchronization point means that the
sync point is irrelevant for programs without data race UB.
>From gcc-bugs-return-584148-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 04:10:44 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83239] False positive from -Wstringop-overflow on simple std::vector code
Date: Tue, 05 Dec 2017 04:10:00 -0000
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
This libstdc++ patch helps avoid both the warning and the bogus memset. if
Jonathan isn't opposed to this kind of annotation I think there might be other
places in vector where this approach could improve the emitted object code.
diff --git a/libstdc++-v3/include/bits/vector.tcc
b/libstdc++-v3/include/bits/vector.tcc
index eadce3c..8093f5e 100644
--- a/libstdc++-v3/include/bits/vector.tcc
+++ b/libstdc++-v3/include/bits/vector.tcc
@@ -582,8 +582,13 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
{
if (__n != 0)
{
- if (size_type(this->_M_impl._M_end_of_storage
- - this->_M_impl._M_finish) >= __n)
+ size_type __navail = size_type(this->_M_impl._M_end_of_storage
+ - this->_M_impl._M_finish);
+
+ if (__navail > max_size () - size ())
+ __builtin_unreachable ();
+
+ if (__navail >= __n)
{
_GLIBCXX_ASAN_ANNOTATE_GROW(__n);
this->_M_impl._M_finish =
>From gcc-bugs-return-584149-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 04:13:48 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83239] False positive from -Wstringop-overflow on simple std::vector code
Date: Tue, 05 Dec 2017 04:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83239
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
An ever-so-slightly slightly simplified test case (no loop) is the following:
void bar (std::vector<int> &a, int num)
{
if (num > 0)
{
const auto sz = a.size ();
if (sz < 3)
a.assign (1, 0);
else
a.resize (sz - 2);
}
}
>From gcc-bugs-return-584150-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 05:18:56 2017
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Subject: [Bug c/83286] New: internal compiler error: Illegal instruction
Date: Tue, 05 Dec 2017 05:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83286
Bug ID: 83286
Summary: internal compiler error: Illegal instruction
Product: gcc
Version: 6.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: aweslowski at gmail dot com
Target Milestone: ---
Summary
----------------------
Error compiling PARI/GP on Windows with MSYS2/mingw64. This might be an error
with make or with the config?
make clean
./configure
make gp
internal compiler error: Illegal instruction
gcc: internal compiler error: Segmentation fault (program cc1)
System
----------------------
Windows 7 Home Premium
MSYS2 64-bit
GCC 6.4.0
Resources
----------------------
http://repo.msys2.org/distrib/x86_64/msys2-x86_64-20161025.exe
Local zip file (includes generated/processed files):
https://www.dropbox.com/s/b2maeinfc459x0o/pari-2.9.3.zip?dl=0
Original tar file from PARI/GP server:
https://pari.math.u-bordeaux.fr/pub/pari/unix/pari-2.9.3.tar.gz
Message
----------------------
/usr/bin/gcc -c -O3 -Wall -fno-strict-aliasing -fomit-frame-pointer
-funroll-loops -fPIC -I. -I../src/headers -o mpker.o mpker.c
In file included from ../src/headers/pari.h:49:0,
from ../src/kernel/none/mp.c:20:
../src/kernel/none/divll_pre.h: In function ‘get_Fl_red’:
../src/kernel/none/divll_pre.h:31:1: internal compiler error: Illegal
instruction
}
^
gcc: internal compiler error: Segmentation fault (program cc1)
Please submit a full bug report,
with preprocessed source if appropriate.
make[1]: *** [Makefile:970: mpker.o] Error 4
>From gcc-bugs-return-584151-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 05:34:26 2017
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Subject: [Bug middle-end/83286] internal compiler error: Illegal instruction
Date: Tue, 05 Dec 2017 05:33:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-12-05
Component|c |middle-end
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Can you read https://gcc.gnu.org/bugs/ and provide the preprocessed source?
>From gcc-bugs-return-584152-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 05:56:37 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83285] non-atomic stores can reorder more aggressively with seq_cst on AArch64 than x86: missed x86 optimization?
Date: Tue, 05 Dec 2017 05:56:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|missed-optimization |wrong-code
Target|x86_64-*-*, i?86-*-*, |aarch64-linux-gnu
|aarch64-*-* |
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-05
Ever confirmed|0 |1
Severity|normal |major
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So this is how the RTL for the atomic store for aarch64:
;; __atomic_store_4 (_6, 2, 5);
(insn 9 8 0 (set (mem/v:SI (reg/v/f:DI 75 [ sync ]) [-1 S4 A32])
(unspec_volatile:SI [
(const_int 2 [0x2])
(const_int 5 [0x5])
] UNSPECV_STL))
"/data1/src/gcc-cavium/toolchain-7/thunderx-tools/aarch64-thunderx-elf/include/c++/7.2.0/bits/atomic_base.h":374
-1
(nil))
For x86:
(insn 9 8 10 (set (mem/v:SI (reg/v/f:DI 89 [ sync ]) [-1 S4 A32])
(unspec:SI [
(reg:SI 90)
(const_int 5 [0x5])
] UNSPEC_STA))
"/data1/src/gcc-cavium/toolchain-7/tools/include/c++/7.1.0/bits/atomic_base.h":374
-1
(nil))
(insn 10 9 0 (set (mem/v:BLK (scratch:DI) [0 A8])
(unspec:BLK [
(mem/v:BLK (scratch:DI) [0 A8])
] UNSPEC_MFENCE))
"/data1/src/gcc-cavium/toolchain-7/tools/include/c++/7.1.0/bits/atomic_base.h":374
-1
(nil))
This is a bug in aarch64.
See https://gcc.gnu.org/wiki/Atomic/GCCMM/AtomicSync :
"Although x and y are unrelated variables, the memory model specifies that the
assert cannot fail. The store to 'y' happens-before the store to x in thread 1.
If the load of 'x' in thread 2 gets the results of the store that happened in
thread 1, it must all see all operations that happened before the store in
thread 1, even unrelated ones. That means the optimizer is not free to reorder
the two stores in thread 1 since thread 2 must see the store to Y as well."
>From gcc-bugs-return-584153-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 06:31:01 2017
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Subject: [Bug middle-end/83286] internal compiler error: Illegal instruction
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--- Comment #2 from Alex Weslowski <aweslowski at gmail dot com> ---
(In reply to Andrew Pinski from comment #1)
> Can you read https://gcc.gnu.org/bugs/ and provide the preprocessed source?
Hi, will attach the mpker.i file to this bug. The zip file has also been
updated. Check the O6.1-none-msys_nt directory, I think.
https://www.dropbox.com/s/b2maeinfc459x0o/pari-2.9.3.zip?dl=0
>From gcc-bugs-return-584154-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 06:32:07 2017
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Subject: [Bug middle-end/83286] internal compiler error: Illegal instruction
Date: Tue, 05 Dec 2017 06:32:00 -0000
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--- Comment #3 from Alex Weslowski <aweslowski at gmail dot com> ---
Created attachment 42786
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42786&action=edit
Preprocessed file mpker.i
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Subject: [Bug middle-end/83286] internal compiler error: Illegal instruction
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--- Comment #4 from Alex Weslowski <aweslowski at gmail dot com> ---
Verbose output:
Making gp in O6.1-none-msys_nt
make[1]: Entering directory 'pari-2.9.3/O6.1-none-msys_nt'
/usr/bin/gcc -v -save-temps -c -O3 -Wall -fno-strict-aliasing
-fomit-frame-pointer -funroll-loops -fPIC -I. -I../src/headers -o mpker.o
mpker.c
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
Target: x86_64-pc-msys
Configured with: /msys_scripts/gcc/src/gcc-6.4.0/configure
--build=x86_64-pc-msys --prefix=/usr --libexecdir=/usr/lib --enable-bootstrap
--enable-shared --enable-shared-libgcc --enable-static
--enable-version-specific-runtime-libs --with-arch=x86-64 --with-tune=generic
--disable-multilib --enable-__cxa_atexit --with-dwarf2
--enable-languages=c,c++,fortran,lto --enable-graphite --enable-threads=posix
--enable-libatomic --enable-libcilkrts --enable-libgomp --enable-libitm
--enable-libquadmath --enable-libquadmath-support --enable-libssp
--disable-win32-registry --disable-symvers --with-gnu-ld --with-gnu-as
--disable-isl-version-check --enable-checking=release --without-libiconv-prefix
--without-libintl-prefix --with-system-zlib --enable-linker-build-id
--with-default-libstdcxx-abi=gcc4-compatible
Thread model: posix
gcc version 6.4.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-O3' '-Wall'
'-fno-strict-aliasing' '-fomit-frame-pointer' '-funroll-loops' '-fPIC' '-I' '.'
'-I' '../src/headers' '-o' 'mpker.o' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-pc-msys/6.4.0/cc1.exe -E -quiet -v -I . -I ../src/headers
-Dunix -idirafter /usr/lib/../lib/../include/w32api -idirafter
/usr/lib/gcc/x86_64-pc-msys/6.4.0/../../../../x86_64-pc-msys/lib/../lib/../../include/w32api
mpker.c -mtune=generic -march=x86-64 -Wall -fno-strict-aliasing
-fomit-frame-pointer -funroll-loops -fPIC -O3 -fpch-preprocess -o mpker.i
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-pc-msys/6.4.0/../../../../x86_64-pc-msys/include"
ignoring duplicate directory
"/usr/lib/gcc/x86_64-pc-msys/6.4.0/../../../../x86_64-pc-msys/lib/../lib/../../include/w32api"
#include "..." search starts here:
#include <...> search starts here:
.
../src/headers
/usr/lib/gcc/x86_64-pc-msys/6.4.0/include
/usr/lib/gcc/x86_64-pc-msys/6.4.0/include-fixed
/usr/include
/usr/lib/../lib/../include/w32api
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-O3' '-Wall'
'-fno-strict-aliasing' '-fomit-frame-pointer' '-funroll-loops' '-fPIC' '-I' '.'
'-I' '../src/headers' '-o' 'mpker.o' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-pc-msys/6.4.0/cc1.exe -fpreprocessed mpker.i -quiet
-dumpbase mpker.c -mtune=generic -march=x86-64 -auxbase-strip mpker.o -O3 -Wall
-version -fno-strict-aliasing -fomit-frame-pointer -funroll-loops -fPIC -o
mpker.s
GNU C11 (GCC) version 6.4.0 (x86_64-pc-msys)
compiled by GNU C version 6.4.0, GMP version 6.1.2, MPFR version
3.1.5-p2, MPC version 1.0.3, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (GCC) version 6.4.0 (x86_64-pc-msys)
compiled by GNU C version 6.4.0, GMP version 6.1.2, MPFR version
3.1.5-p2, MPC version 1.0.3, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 24bcd17f6cf5e28e81030c79700f6f57
In file included from ../src/headers/pari.h:49:0,
from ../src/kernel/none/mp.c:20:
../src/kernel/none/divll_pre.h: In function ‘get_Fl_red’:
../src/kernel/none/divll_pre.h:31:1: internal compiler error: Illegal
instruction
}
^
gcc: internal compiler error: Segmentation fault (program cc1)
make[1]: *** [Makefile:970: mpker.o] Error 4
make[1]: Leaving directory 'pari-2.9.3/O6.1-none-msys_nt'
make: *** [Makefile:34: gp] Error 2
>From gcc-bugs-return-584156-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 07:10:17 2017
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
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--- Comment #9 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 42787
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42787&action=edit
/proc/cpuinfo from cortex-a7 Raspberry Pi 2b v1.1
/proc/cpuinfo from cortex-a7 Raspberry Pi 2b v1.1
>From gcc-bugs-return-584157-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 07:11:28 2017
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
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--- Comment #10 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 42788
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42788&action=edit
/proc/cpuinfo from odroid-xu4 big/little cortex-a15/cortex-a7
/proc/cpuinfo from odroid-xu4 big/little cortex-a15/cortex-a7
>From gcc-bugs-return-584158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 07:12:44 2017
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
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--- Comment #11 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 42789
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42789&action=edit
/proc/cpuinfo from rpi b (arm1176jzf-s)
/proc/cpuinfo from rpi b (arm1176jzf-s)
>From gcc-bugs-return-584159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 07:13:15 2017
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Subject: [Bug middle-end/83286] internal compiler error: Illegal instruction
Date: Tue, 05 Dec 2017 07:13:00 -0000
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--- Comment #5 from Alex Weslowski <aweslowski at gmail dot com> ---
Please note, this appears to be fixed (hopefully) in GCC 7.2.0. Either that, or
my version of GCC 6.4.0 is borked. (Or, it may be an intermittent error, I
suppose.)
>From gcc-bugs-return-584160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 07:13:55 2017
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
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--- Comment #12 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 42790
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42790&action=edit
/proc/cpuinfo from Raspberry Pi 3 (cortex-A53) arm mode
/proc/cpuinfo from Raspberry Pi 3 (cortex-A53) arm mode
>From gcc-bugs-return-584161-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 07:15:31 2017
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
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--- Comment #13 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 42791
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42791&action=edit
/proc/cpuinfo from odroid-c2 (cortex-A53) aarch64 mode
/proc/cpuinfo from odroid-c2 (cortex-A53) aarch64 mode
>From gcc-bugs-return-584162-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 07:32:10 2017
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From: "andrewm.roberts at sky dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
Date: Tue, 05 Dec 2017 07:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83206
--- Comment #14 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Richard, I have checked with latest snapshot (20171203) and problem persists.
I think the issue is that the CPU on the original Raspberry Pi and Pi Zero is
not detected properly by gcc.
/usr/local/gcc/bin/gcc -mcpu=native -Q --help=target | grep mcpu=
-mcpu= arm1176jz-s
But the processor is actually an arm1176jzf-s
Using:
/usr/local/gcc/bin/gcc -o matrix-v6 -mcpu=arm1176jzf-s -mfpu=auto -O3
matrix.c
works
whereas using -mcpu=native or -mcpu=arm1176jz-s fails (no FPU).
gcc seems to parse /proc/cpuinfo to get the MIDR details and this is correct
(as far as it goes). But it doesn't parse the Features line to get the FPU
details. Which is the only way of telling the arm1176jz-s from arm1176jzf-s (as
Linux doesn't give access to control registers).
On Raspberry Pi B/Zero:
Features : half thumb fastmult vfp edsp java tls
I've attached /proc/cpuinfo for all arm processors I have.
While looking at this it might be worth also looking at bug 83207 (big/little
cpu detection) as that is just a case of parsing out both processors from the
/proc/cpuinfo file (see odroid-xu4 file)
It might be worth soliciting additional /proc/cpuinfo files from the mailing
list, if anybody has them.
>From gcc-bugs-return-584163-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 07:36:01 2017
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Subject: [Bug driver/83206] -mfpu=auto does not work on ARM (armv7l-unknown-linux-gnueabihf)
Date: Tue, 05 Dec 2017 07:36:00 -0000
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--- Comment #15 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 42792
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42792&action=edit
/proc/cpuinfo fro rpi3 (cortex a-53) on aarch64
/proc/cpuinfo fro rpi3 (cortex a-53) on aarch64
while this is the same cpu as odroid-c2 running aarch64, it has much newer
kernel.
rpi: 4.14.3-1-ARCH
odroid-c2: 3.14.79-28-ARCH
Newer aarch64 kernels expose MIDR directly at:
/sys/devices/system/cpu/cpu0/regs/identification/midr_el1
but not the other control regs needed for FPU detection
>From gcc-bugs-return-584164-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 08:23:05 2017
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Subject: [Bug middle-end/81876] [7 Regression] bogus -Wstrict-overflow warning with -O3
Date: Tue, 05 Dec 2017 08:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81876
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2017-08-17 00:00:00 |2017-12-5
Summary|[7/8 Regression] bogus |[7 Regression] bogus
|-Wstrict-overflow warning |-Wstrict-overflow warning
|with -O3 |with -O3
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The warning no longer occurs on trunk, re-confirmed on the branch.
I think there's two sides generally
1) the strict-overflow warnings out of middle-end folding code are just too
fragile, we're getting rid of them
2) the question is what location stmts should have for code generated by GCC
(like that stmts to compute the memset size). We currently assign a location
near the emission place but one could argue it should be UNKNOWN_LOCATION
(or ARTIFICIAL_LOCATION if there would be sth like this). We'd then simply
avoid emitting warnings with no good location, aka treating the stmts as
artificial (compiler-generated).
Index: gcc/tree-loop-distribution.c
===================================================================
--- gcc/tree-loop-distribution.c (revision 255402)
+++ gcc/tree-loop-distribution.c (working copy)
@@ -813,7 +813,7 @@ generate_memset_builtin (struct loop *lo
/* The new statements will be placed before LOOP. */
gsi = gsi_last_bb (loop_preheader_edge (loop)->src);
- nb_bytes = build_size_arg_loc (loc, partition->main_dr, partition->niter,
+ nb_bytes = build_size_arg_loc (UNKNOWN_LOCATION, partition->main_dr,
partition->niter,
partition->plus_one);
nb_bytes = force_gimple_operand_gsi (&gsi, nb_bytes, true, NULL_TREE,
false, GSI_CONTINUE_LINKING);
changes the warning to
> ./cc1 -quiet t.c -O3 -Wall -Wstrict-overflow
t.c: In function ‘cell_array_lower’:
cc1: warning: assuming signed overflow does not occur when assuming that (X +
c) >= X is always true [-Wstrict-overflow]
which shows we also need sth to prune such useless warnings:
Index: gcc/fold-const.c
===================================================================
--- gcc/fold-const.c (revision 255402)
+++ gcc/fold-const.c (working copy)
@@ -265,7 +265,8 @@ fold_undefer_overflow_warnings (bool iss
locus = input_location;
else
locus = gimple_location (stmt);
- warning_at (locus, OPT_Wstrict_overflow, "%s", warnmsg);
+ if (locus != UNKNOWN_LOCATION)
+ warning_at (locus, OPT_Wstrict_overflow, "%s", warnmsg);
}
/* Stop deferring overflow warnings, ignoring any deferred
another side-effect might be that we avoid some jumping in gdb if we don't
assign line info to this kind of stmts.
>From gcc-bugs-return-584165-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 08:40:30 2017
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Subject: [Bug tree-optimization/82103] spurious stringop-overflow warning
Date: Tue, 05 Dec 2017 08:40:00 -0000
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--- Comment #5 from Arnd Bergmann <arnd at linaro dot org> ---
In that case, shouldn't we also warn if the conditional function call in front
of it wasn't there, or without the '__n != 0' check?
>From gcc-bugs-return-584166-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 08:48:30 2017
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Subject: [Bug c++/80038] [6/7 Regression] Random segfault using local vectors in Cilk function
Date: Tue, 05 Dec 2017 08:48:00 -0000
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--- Comment #34 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
On 2017-12-04 11:05 +0000, paolo.carlini at oracle dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80038
>
> Paolo Carlini <paolo.carlini at oracle dot com> changed:
>
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
> Â Â Â Â Â Â Â Â Â Â Â Â Â Status|WAITINGÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â |RESOLVED
> Â Â Â Â Â Â Â Â Â Resolution|---Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â |WONTFIX
>
> --- Comment #33 from Paolo Carlini <paolo.carlini at oracle dot com> ---
> Cilk Plus, deprecated for 7.x, will not be in 8.x.
Whoa! But let's backport the fix to 7.x so we'll have a working release...
>From gcc-bugs-return-584167-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 09:07:00 2017
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Subject: [Bug rtl-optimization/83272] Unnecessary mask instruction generated
Date: Tue, 05 Dec 2017 09:07:00 -0000
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--- Comment #3 from Mason <slash.tmp at free dot fr> ---
I think Jakub is right about an interaction between movzbl and shrb.
unsigned long long foo1(unsigned char *p) { return *p; }
foo1:
movzbl (%rdi), %eax
ret
I.e. gcc "knows" that movzbl clears the upper bits of RAX. However...
unsigned long long foo2(unsigned char *p) { return *p / 2; }
foo2:
movzbl (%rdi), %eax
shrb %al
movzbl %al, %eax
ret
gcc seems to think that shrb might "mess up" some bits in RAX, which then
need to be cleared again through an extra movzbl.
"shr %al" is encoded as "d0 e8" while "shr %eax" is "d1 e8"
The former is not more efficient than the latter.
As Marc Glisse pointed out, a solution is convincing gcc to store the
intermediate results in a register:
unsigned long long foo3(unsigned char *p)
{
unsigned int temp = *p;
return temp / 2;
}
foo3:
movzbl (%rdi), %eax
shrl %eax
ret
gcc "knows" that shrl does not "disturb" RAX, so no extra movzbl required.
According to the "integer promotions" rules, *p is promoted to int in the
expression (*p / 2) used in foo2. However...
unsigned long long foo4(unsigned char *p)
{
int temp = *p;
return temp / 2;
}
foo4:
movzbl (%rdi), %eax
sarl %eax
cltq
ret
An 8-bit unsigned char promoted to int or unsigned int has the same value.
I expect the same code generated for foo2, foo3, foo4.
Yet we get 3 different code snippets.
>From gcc-bugs-return-584168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 09:32:48 2017
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Subject: [Bug target/83267] [8 regression] [armeb] gfortran.fortran-torture/execute/scalarize2.f90 fails since r255307
Date: Tue, 05 Dec 2017 09:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target Milestone|--- |8.0
>From gcc-bugs-return-584169-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 09:44:56 2017
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Subject: [Bug c++/82115] [8 Regression] ICE on (valid) C++11 code: Segmentation fault signal terminated program cc1plus
Date: Tue, 05 Dec 2017 09:44:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-05
Ever confirmed|0 |1
>From gcc-bugs-return-584170-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 09:47:10 2017
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Subject: [Bug c++/83271] const variable previously declared "extern" results in "weak declaration must be public" error
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can't we simply force it public when processing the attribute and let
duplicate-decl complain when merging a previous declaration/definition?
>From gcc-bugs-return-584171-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 09:47:29 2017
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From: "florent.hivert at lri dot fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80038] [6/7 Regression] Random segfault using local vectors in Cilk function
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--- Comment #35 from Florent Hivert <florent.hivert at lri dot fr> ---
I can't help knowing nothing about the internal of GCC, but I'm strongly in
favor having a release with this fix, in particular since it's there and since
there is no good replacement for Cilk. OpenMP task is far from being as
efficient for small recursive tasks.
>From gcc-bugs-return-584172-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 09:55:42 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82382] [7/8 Regression] ICE for template auto parameter specialized for function pointer with variadic arguments
Date: Tue, 05 Dec 2017 09:55:00 -0000
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--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Related to PR82331.
>From gcc-bugs-return-584175-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 09:57:54 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82331] [7/8 Regression] ICE specializing template<auto> for function pointer
Date: Tue, 05 Dec 2017 09:57:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |witosx at gmail dot com
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
*** Bug 82382 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-584173-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 09:57:22 2017
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83287] New: ice in tsubst_copy, at cp/pt.c:14884
Date: Tue, 05 Dec 2017 09:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83287
Bug ID: 83287
Summary: ice in tsubst_copy, at cp/pt.c:14884
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
Created attachment 42793
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42793&action=edit
gzipped C++ source code
The attached C++ source code, with recent gcc trunk, does this:
In file included from array_real.cpp:28:
array_tlp.hpp: In instantiation of ‘void ArrayOperatorF() [with K = double; KK
=
double]’:
array_real.cpp:45:35: required from here
array_tlp.hpp:1760:27: internal compiler error: in tsubst_copy, at
cp/pt.c:14884
0x7e5bf2 tsubst_copy
../../trunk/gcc/cp/pt.c:14884
0x7cc740 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bo
ol)
../../trunk/gcc/cp/pt.c:18294
0x7cf287 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bo
ol)
../../trunk/gcc/cp/pt.c:17929
0x7cc588 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bo
ol)
../../trunk/gcc/cp/pt.c:17438
0x7cd121 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bo
ol)
This bug seems to have been around since before revision 248835.
Here is a reduced piece of code which seems to demonstrate the problem:
void a();
namespace {
void a();
}
template <class, class> b() { a }
void c {
b<double, double>()
}
>From gcc-bugs-return-584174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 09:57:50 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82382] [7/8 Regression] ICE for template auto parameter specialized for function pointer with variadic arguments
Date: Tue, 05 Dec 2017 09:57:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
In fact it's a special case.
*** This bug has been marked as a duplicate of bug 82331 ***
>From gcc-bugs-return-584176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 09:58:31 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83276] ICE in pre_and_rev_post_order_compute, at cfganal.c:1050
Date: Tue, 05 Dec 2017 09:58:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |openmp
Component|tree-optimization |middle-end
Known to fail| |7.2.1, 8.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I get with checking:
> ./cc1 -quiet t.c -fopenmp
during GIMPLE pass: ompexp
t.c: In function ‘f’:
t.c:4:15: internal compiler error: in verify_sese, at tree-cfg.c:7317
#pragma omp parallel for
^~~
0xfaca6c verify_sese(basic_block_def*, basic_block_def*, vec<basic_block_def*,
va_heap, vl_ptr>*)
/tmp/trunk2/gcc/tree-cfg.c:7317
0xfacc71 move_sese_region_to_fn(function*, basic_block_def*, basic_block_def*,
tree_node*)
/tmp/trunk2/gcc/tree-cfg.c:7392
0xd908cb expand_omp_taskreg
/tmp/trunk2/gcc/omp-expand.c:1302
0xdae8cb expand_omp
/tmp/trunk2/gcc/omp-expand.c:7714
0xdaeee3 execute_expand_omp
/tmp/trunk2/gcc/omp-expand.c:7942
I think you shouldn't use __builtin_return inside an OMP region... (aka, doctor
it hurts).
>From gcc-bugs-return-584177-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 09:59:17 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83271] const variable previously declared "extern" results in "weak declaration must be public" error
Date: Tue, 05 Dec 2017 09:59:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> Can't we simply force it public when processing the attribute and let
> duplicate-decl complain when merging a previous declaration/definition?
We can, even guarded on C++ only (although it is in c-family) and on the cases
where this can happen (TREE_READONLY && TREE_STATIC, anything else?).
But complain when merging a previous declaration/definition can't be enough,
because there might not be the previous declaration/definition at all. So it
would need to be finalized somewhere else.
>From gcc-bugs-return-584178-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 10:02:00 2017
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Subject: [Bug middle-end/83286] internal compiler error: Illegal instruction
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |mingw64
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Illegal instruction is usually coming from gmp/mpfr which might be linked
statically into your GCC binary on mingw.
>From gcc-bugs-return-584179-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 10:03:56 2017
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Subject: [Bug bootstrap/83284] bootstrap comparison failure in libiberty/stack-limit.o
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-12-05
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
What's your host compiler? Which section is the difference in?
>From gcc-bugs-return-584180-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 10:07:15 2017
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Subject: [Bug tree-optimization/83283] [7/8 Regression] Casting from boolean to unsigned char to enum returns incorrect results
Date: Tue, 05 Dec 2017 10:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83283
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |needs-bisection
CC| |rguenth at gcc dot gnu.org
Known to work| |7.2.1, 8.0
Known to fail| |7.2.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This has been fixed on the GCC 7 branch already. Too lazy to lookup the
duplicate...
>From gcc-bugs-return-584181-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 10:08:16 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/83281] [8 regression] libgomp.oacc-c-c++-common/reduction-cplx-flt.c and reduction-cplx-dbl.c fail starting with r255335
Date: Tue, 05 Dec 2017 10:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83281
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
>From gcc-bugs-return-584182-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 10:17:12 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80038] [6/7 Regression] Random segfault using local vectors in Cilk function
Date: Tue, 05 Dec 2017 10:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80038
--- Comment #36 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Please ask on the mailing list.
>From gcc-bugs-return-584183-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 10:28:18 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83277] [8 Regression] [graphite] Wrong code w/ -O2 -floop-nest-optimize
Date: Tue, 05 Dec 2017 10:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83277
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-12-05
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testing patch.
Index: gcc/graphite-isl-ast-to-gimple.c
===================================================================
--- gcc/graphite-isl-ast-to-gimple.c (revision 255402)
+++ gcc/graphite-isl-ast-to-gimple.c (working copy)
@@ -1137,8 +1137,10 @@ should_copy_to_new_region (gimple *stmt,
if (is_gimple_assign (stmt)
&& (lhs = gimple_assign_lhs (stmt))
&& TREE_CODE (lhs) == SSA_NAME
- && is_gimple_reg (lhs)
- && scev_analyzable_p (lhs, region->region))
+ && scev_analyzable_p (lhs, region->region)
+ /* But to code-generate liveouts - liveout PHI generation is
+ in generic sese.c code that cannot do code generation. */
+ && ! bitmap_bit_p (region->liveout, SSA_NAME_VERSION (lhs)))
return false;
return true;
>From gcc-bugs-return-584184-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 10:38:41 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83282] missing comma in format changes output
Date: Tue, 05 Dec 2017 10:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83282
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P5
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-05
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (8.0).
write(*,'(*("["a,"]":))')array
or
write(*,'(*("["a5"]":))')array
give the expected result.
Reduced test case
write(*,'(aa)') "ab", "bc"
write(*,'(a"bc")') "ab"
write(*,'(a"cd"a)') "ab", "bc"
end
gives
abbc
ab
abc
i.e., the problem seems to occur when an 'a' descriptor is immediately followed
by a string.
>From gcc-bugs-return-584185-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 10:39:16 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83288] New: [8 Regression] polyhedron gas_dyn 2-fold compile-time regression
Date: Tue, 05 Dec 2017 10:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83288
Bug ID: 83288
Summary: [8 Regression] polyhedron gas_dyn 2-fold compile-time
regression
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: compile-time-hog, needs-bisection
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https://gcc.opensuse.org/gcc-old/c++bench-czerny/pb11/pb11-summary.txt-1-0.html
shows a two-fold compile-time regression of gas_dyn. Log files indicate
this happened between r255080 (good, 1s) and r255143 (bad, 1.8s). On another
machine good is r255085 (4s) and bad r255144 (8s).
>From gcc-bugs-return-584186-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 10:44:56 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83287] [8 Regression] ice in tsubst_copy, at cp/pt.c:14884
Date: Tue, 05 Dec 2017 10:44:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-05
Known to work| |7.2.1
Target Milestone|--- |8.0
Summary|ice in tsubst_copy, at |[8 Regression] ice in
|cp/pt.c:14884 |tsubst_copy, at
| |cp/pt.c:14884
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-584187-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 10:49:55 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83288] [8 Regression] polyhedron gas_dyn 2-fold compile-time regression
Date: Tue, 05 Dec 2017 10:49:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is with -Ofast -funroll-loops -march={core-avx2,k8} with release checking.
>From gcc-bugs-return-584188-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 11:06:12 2017
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Subject: [Bug libstdc++/54043] [LWG 2221] cout << nullptr does not work
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Ville Voutilainen <ville.voutilainen at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |ville.voutilainen at gmail dot com
Assignee|unassigned at gcc dot gnu.org |ville.voutilainen at gmail dot com
--- Comment #16 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Mine.
>From gcc-bugs-return-584189-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 11:07:01 2017
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Subject: [Bug libstdc++/54043] [LWG 2221] cout << nullptr does not work
Date: Tue, 05 Dec 2017 11:07:00 -0000
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--- Comment #17 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Initial patch is at https://gcc.gnu.org/ml/gcc-patches/2017-12/msg00112.html,
will need to wait until next stage1 to continue on it.
>From gcc-bugs-return-584190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 11:21:28 2017
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Subject: [Bug c++/83248] Spuriously identifying template arguments
Date: Tue, 05 Dec 2017 11:21:00 -0000
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--- Comment #2 from Michel Morin <mimomorin at gmail dot com> ---
Ah, I thought that GCC 5-7 and trunk were maintained.
> if it is fixed in GCC 6 please use that.
OK, I'll forward the message to the PR in Boost trac.
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Subject: [Bug sanitizer/81281] [6/7/8 Regression] UBSAN: false positive, dropped promotion to long type.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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is obsolete| |
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42794
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42794&action=edit
gcc8-pr81281.patch
Untested fix.
>From gcc-bugs-return-584192-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 11:26:54 2017
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Subject: [Bug sanitizer/81281] [6/7/8 Regression] UBSAN: false positive, dropped promotion to long type.
Date: Tue, 05 Dec 2017 11:26:00 -0000
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Corresponding diff -upbd for better readability:
--- gcc/match.pd.jj 2017-11-28 09:40:08.000000000 +0100
+++ gcc/match.pd 2017-12-05 11:36:58.855074420 +0100
@@ -1783,9 +1783,8 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
(bit_not @0))
/* (T)(P + A) - (T)P -> (T) A */
- (for add (plus pointer_plus)
(simplify
- (minus (convert (add @@0 @1))
+ (minus (convert (plus:c @@0 @1))
(convert @0))
(if (element_precision (type) <= element_precision (TREE_TYPE (@1))
/* For integer types, if A has a smaller type
@@ -1796,7 +1795,12 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
undefined behavior, we can assume that there
is no overflow. */
|| (INTEGRAL_TYPE_P (TREE_TYPE (@0))
- && TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (@0)))
+ && TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (@0))))
+ (convert @1)))
+ (simplify
+ (minus (convert (pointer_plus @@0 @1))
+ (convert @0))
+ (if (element_precision (type) <= element_precision (TREE_TYPE (@1))
/* For pointer types, if the conversion of A to the
final type requires a sign- or zero-extension,
then we have to punt - it is not defined which
@@ -1804,7 +1808,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
|| (POINTER_TYPE_P (TREE_TYPE (@0))
&& TREE_CODE (@1) == INTEGER_CST
&& tree_int_cst_sign_bit (@1) == 0))
- (convert @1))))
+ (convert @1)))
(simplify
(pointer_diff (pointer_plus @@0 @1) @0)
/* The second argument of pointer_plus must be interpreted as signed, and
@@ -1813,10 +1817,14 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
(convert (convert:stype @1))))
/* (T)P - (T)(P + A) -> -(T) A */
- (for add (plus pointer_plus)
(simplify
(minus (convert @0)
- (convert (add @@0 @1)))
+ (convert (plus:c @@0 @1)))
+ (if (INTEGRAL_TYPE_P (type)
+ && TYPE_OVERFLOW_UNDEFINED (type)
+ && element_precision (type) <= element_precision (TREE_TYPE (@1)))
+ (with { tree utype = unsigned_type_for (type); }
+ (convert (negate (convert:utype @1))))
(if (element_precision (type) <= element_precision (TREE_TYPE (@1))
/* For integer types, if A has a smaller type
than T the result depends on the possible
@@ -1826,7 +1834,17 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
undefined behavior, we can assume that there
is no overflow. */
|| (INTEGRAL_TYPE_P (TREE_TYPE (@0))
- && TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (@0)))
+ && TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (@0))))
+ (negate (convert @1)))))
+ (simplify
+ (minus (convert @0)
+ (convert (pointer_plus @@0 @1)))
+ (if (INTEGRAL_TYPE_P (type)
+ && TYPE_OVERFLOW_UNDEFINED (type)
+ && element_precision (type) <= element_precision (TREE_TYPE (@1)))
+ (with { tree utype = unsigned_type_for (type); }
+ (convert (negate (convert:utype @1))))
+ (if (element_precision (type) <= element_precision (TREE_TYPE (@1))
/* For pointer types, if the conversion of A to the
final type requires a sign- or zero-extension,
then we have to punt - it is not defined which
@@ -1843,10 +1861,14 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
(negate (convert (convert:stype @1)))))
/* (T)(P + A) - (T)(P + B) -> (T)A - (T)B */
- (for add (plus pointer_plus)
(simplify
- (minus (convert (add @@0 @1))
- (convert (add @0 @2)))
+ (minus (convert (plus:c @@0 @1))
+ (convert (plus:c @0 @2)))
+ (if (INTEGRAL_TYPE_P (type)
+ && TYPE_OVERFLOW_UNDEFINED (type)
+ && element_precision (type) <= element_precision (TREE_TYPE (@1)))
+ (with { tree utype = unsigned_type_for (type); }
+ (convert (minus (convert:utype @1) (convert:utype @2))))
(if (element_precision (type) <= element_precision (TREE_TYPE (@1))
/* For integer types, if A has a smaller type
than T the result depends on the possible
@@ -1856,7 +1878,17 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
undefined behavior, we can assume that there
is no overflow. */
|| (INTEGRAL_TYPE_P (TREE_TYPE (@0))
- && TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (@0)))
+ && TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (@0))))
+ (minus (convert @1) (convert @2)))))
+ (simplify
+ (minus (convert (pointer_plus @@0 @1))
+ (convert (pointer_plus @0 @2)))
+ (if (INTEGRAL_TYPE_P (type)
+ && TYPE_OVERFLOW_UNDEFINED (type)
+ && element_precision (type) <= element_precision (TREE_TYPE (@1)))
+ (with { tree utype = unsigned_type_for (type); }
+ (convert (minus (convert:utype @1) (convert:utype @2))))
+ (if (element_precision (type) <= element_precision (TREE_TYPE (@1))
/* For pointer types, if the conversion of A to the
final type requires a sign- or zero-extension,
then we have to punt - it is not defined which
@@ -1866,13 +1898,13 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
&& tree_int_cst_sign_bit (@1) == 0
&& TREE_CODE (@2) == INTEGER_CST
&& tree_int_cst_sign_bit (@2) == 0))
- (minus (convert @1) (convert @2)))))))
+ (minus (convert @1) (convert @2)))))
(simplify
(pointer_diff (pointer_plus @@0 @1) (pointer_plus @0 @2))
/* The second argument of pointer_plus must be interpreted as signed, and
thus sign-extended if necessary. */
(with { tree stype = signed_type_for (TREE_TYPE (@1)); }
- (minus (convert (convert:stype @1)) (convert (convert:stype @2)))))
+ (minus (convert (convert:stype @1)) (convert (convert:stype @2)))))))
/* Simplifications of MIN_EXPR, MAX_EXPR, fmin() and fmax(). */
>From gcc-bugs-return-584193-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 11:32:33 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83288] [8 Regression] polyhedron gas_dyn 2-fold compile-time regression caused by r255103
Date: Tue, 05 Dec 2017 11:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-05
CC| |hubicka at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|[8 Regression] polyhedron |[8 Regression] polyhedron
|gas_dyn 2-fold compile-time |gas_dyn 2-fold compile-time
|regression |regression caused by
| |r255103
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Caused by r255103
Index: gcc/ChangeLog
===================================================================
--- gcc/ChangeLog (revision 255102)
+++ gcc/ChangeLog (revision 255103)
@@ -1,5 +1,10 @@
2017-11-23 Jan Hubicka <hubicka@ucw.cz>
+ * ipa-fnsummary.c (record_modified_bb_info): Use sreal
+ frequencies. Fix estimation of aggregate parameters.
+
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83288] [8 Regression] polyhedron gas_dyn 2-fold compile-time regression caused by r255103
Date: Tue, 05 Dec 2017 11:41:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
We're doing a lot more inlining blowing up the CU. note the bit_speedup thing
below (- is good, + is bad). Not sure if the intent was to "break" things
like this (SPEC 2k6 int also has some compile-time jumps in this area).
- enqueuing call qsort.constprop/114 -> qsort.constprop/114, badness -0.000000
+ enqueuing call qsort.constprop/114 -> qsort.constprop/114, badness -0.000004
...
Considering cd/11 with 48 size
to be inlined into drag/12 in gas_dyn.f90:291
- Estimated badness is -0.015686, frequency 1.00.
+ Estimated badness is -1.333333, frequency 1.00.
Badness calculation for drag/12 -> cd/11
- size growth 42, time 53.000000 unspec 55.000000 big_speedup
- -0.003922: guessed profile. frequency 1.000000, count -1 caller count -1
time w/o inlining 99.000000, time with inlining 85.000000 overall growth -6
(current) -6 (original) -6 (compensated)
- Adjusted by hints -0.015686
+ size growth 42, time 53.000000 unspec 55.000000
+ -0.333333: guessed profile. frequency 1.000000, count -1 caller count -1
time w/o inlining 99.000000, time with inlining 85.000000 overall growth -6
(current) -6 (original) -6 (compensated)
+ Adjusted by hints -1.333333
Accounting size:44.00, time:53.00 on predicate exec:(true)
Accounting size:0.50, time:0.00 on predicate exec:(true)
...
Considering value/21 with 11 size
to be inlined into readin/18 in gas_dyn.f90:1393
- Estimated badness is -0.000004, frequency 274.47.
+ Estimated badness is -0.106369, frequency 274.47.
Badness calculation for readin/18 -> value/21
- size growth 5, time 18.865600 unspec 20.865600 big_speedup
- -0.000004: guessed profile. frequency 274.469895, count -1 caller count
-1 time w/o inlining 27612.909485, time with inlining 23770.330963 overall
growth 85 (current) 85 (original) 7225 (compensated)
- Adjusted by hints -0.000004
+ size growth 5, time 18.865600 unspec 20.865600
+ -0.106369: guessed profile. frequency 274.469895, count -1 caller count
-1 time w/o inlining 27612.909485, time with inlining 23770.330963 overall
growth 85 (current) 85 (original) 7225 (compensated)
+ Adjusted by hints -0.106369
Accounting size:3.50, time:823.41 on predicate exec:(true)
...
- enqueuing call value/115 -> value_.part.1/113, badness -0.013826
+ enqueuing call value/115 -> value_.part.1/113, badness -395.421551
...
Considering value_.part.1/113 with 26 size
to be inlined into value/115 in unknown:0
- Estimated badness is -0.013826, frequency 134.16.
+ Estimated badness is -395.421551, frequency 134.16.
Badness calculation for value/115 -> value_.part.1/113
size growth 19, time 48.000000 unspec 50.000000
- -0.003456: guessed profile. frequency 134.160883, count -1 caller count
-1 time w/o inlining 30478.375122, time with inlining 28600.122757 overall
growth 12 (current) -7 (original) -7 (compensated)
- Adjusted by hints -0.013826
+ -98.855388: guessed profile. frequency 134.160883, count -1 caller count
-1 time w/o inlining 30478.375122, time with inlining 28600.122757 overall
growth 12 (current) -7 (original) -7 (compensated)
+ Adjusted by hints -395.421551
Accounting size:14.00, time:1744.09 on predicate exec:(true)
...
Considering qsort.constprop/114 with 82 size
- to be inlined into qsort.constprop/151 in gas_dyn.f90:1614
- Estimated badness is -0.000000, frequency 0.26.
- Badness calculation for qsort.constprop/151 -> qsort.constprop/114
+ to be inlined into qsort.constprop/149 in gas_dyn.f90:1614
+ Estimated badness is -0.000047, frequency 0.26.
+ Badness calculation for qsort.constprop/149 -> qsort.constprop/114
size growth 72, time 70.186200 unspec 81.186200 IPA hints: loop_stride
- -0.000000: guessed profile. frequency 0.256760, count -1 caller count -1
time w/o inlining 29073.890945, time with inlining 29068.242218 overall growth
1
44 (current) 82 (original) 6724 (compensated)
- Adjusted by hints -0.000000
- not inlining recursively: not executed in profile
+ -0.000012: guessed profile. frequency 0.256760, count -1 caller count -1
time w/o inlining 29073.890945, time with inlining 29068.242218 overall growth
144 (current) 82 (original) 6724 (compensated)
+ Adjusted by hints -0.000047
+ Peeling recursion with depth 1
(!)
>From gcc-bugs-return-584195-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 11:42:39 2017
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Subject: [Bug tree-optimization/83288] [8 Regression] polyhedron gas_dyn 2-fold compile-time regression caused by r255103
Date: Tue, 05 Dec 2017 11:42:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Goes from
text data bss dec hex filename
58882 20 8001512 8060414 7afdfe gas_dyn.o
to
text data bss dec hex filename
90002 20 8001512 8091534 7b778e gas_dyn.o
so compile-time changes roughly proportional to text size.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83287] [8 Regression] ice in tsubst_copy, at cp/pt.c:14884
Date: Tue, 05 Dec 2017 11:43:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r248250. Slightly cleaned up testcase:
void foo ();
namespace {
void foo ();
}
template <class, class>
void
bar ()
{
void *p = (void *) foo;
}
void
baz ()
{
bar<double, double> ();
}
>From gcc-bugs-return-584197-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 11:53:57 2017
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Subject: [Bug tree-optimization/83283] [7/8 Regression] Casting from boolean to unsigned char to enum returns incorrect results
Date: Tue, 05 Dec 2017 11:53:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |jakub at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
On the trunk, started with r230098 and got fixed in r253146 aka PR82285, which
got backported to 7.x in r253190. I'll add the testcase to the testsuite.
>From gcc-bugs-return-584198-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 12:06:15 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/83289] New: [8 regression] i386/sse2-init-v2di-2.c, i386/avx256-unaligned-load-1.c, i386/avx256-unaligned-store-*.c fails
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Bug ID: 83289
Summary: [8 regression] i386/sse2-init-v2di-2.c,
i386/avx256-unaligned-load-1.c,
i386/avx256-unaligned-store-*.c fails
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: andrey.y.guskov at intel dot com
Target Milestone: ---
r255348 triggers these fails:
---
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.target/i386/sse2-init-v2di-2.c
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-fdiagnostics-color=never -O2 -msse4 -march=core2 -dp -ffat-lto-objects -S -o
sse2-init-v2di-2.s
PASS: gcc.target/i386/sse2-init-v2di-2.c (test for excess errors)
FAIL: gcc.target/i386/sse2-init-v2di-2.c scan-assembler-times vec_concatv2di/5
1 (found 0 times)
---
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.target/i386/avx256-unaligned-load-1.c
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-fdiagnostics-color=never -O3 -dp -mavx -mavx256-split-unaligned-load
-mno-prefer-avx128 -ffat-lto-objects -S -o avx256-unaligned-load-1.s
PASS: gcc.target/i386/avx256-unaligned-load-1.c (test for excess errors)
FAIL: gcc.target/i386/avx256-unaligned-load-1.c scan-assembler-not
vmovups[^]*movv8sf_internal/3
---
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-1.c
-B/work/x86_64-pc-linu
x-gnu/./libmpx/ -B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs -B/work/x86_64-pc-linux-gnu/
./libmpx/ -B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-f
diagnostics-color=never -O3 -dp -mavx -mavx256-split-unaligned-store
-mno-prefer-avx128 -fno-common -ffat-lto-objects -S -o avx256-unali
gned-store-1.s
PASS: gcc.target/i386/avx256-unaligned-store-1.c (test for excess errors)
PASS: gcc.target/i386/avx256-unaligned-store-1.c scan-assembler-not
vmovups.*movv8sf_internal/4
FAIL: gcc.target/i386/avx256-unaligned-store-1.c scan-assembler
vmovups.*movv4sf_internal/4
---
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-2.c
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-fdiagnostics-color=never -O3 -mtune-ctrl=sse_typeless_stores -dp -mavx
-mavx256-split-unaligned-store -mno-prefer-avx128 -ffat-lto-objects -S -o
avx256-unaligned-store-2.s
PASS: gcc.target/i386/avx256-unaligned-store-2.c (test for excess errors)
PASS: gcc.target/i386/avx256-unaligned-store-2.c scan-assembler-not
vmovups.*movv32qi_internal/4
FAIL: gcc.target/i386/avx256-unaligned-store-2.c scan-assembler
vmovups.*movv16qi_internal/4
---
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-3.c
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-fdiagnostics-color=never -O3 -dp -mavx -mavx256-split-unaligned-store
-mtune=generic -fno-common -ffat-lto-objects -S -o avx256-unaligned-store-3.s
PASS: gcc.target/i386/avx256-unaligned-store-3.c (test for excess errors)
PASS: gcc.target/i386/avx256-unaligned-store-3.c scan-assembler-not
vmovups.*movv4df_internal/4
FAIL: gcc.target/i386/avx256-unaligned-store-3.c scan-assembler
vmovups.*movv2df_internal/4
---
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/
/source/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-4.c
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxrt
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxrt/.libs
-B/work/x86_64-pc-linux-gnu/./libmpx/
-B/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap
-L/work/x86_64-pc-linux-gnu/./libmpx/mpxwrap/.libs -fno-diagnostics-show-caret
-fdiagnostics-color=never -O3 -dp -mavx -mno-avx256-split-unaligned-load
-mno-avx256-split-unaligned-store -mno-prefer-avx128 -fno-common
-ffat-lto-objects -S -o avx256-unaligned-store-4.s
PASS: gcc.target/i386/avx256-unaligned-store-4.c (test for excess errors)
FAIL: gcc.target/i386/avx256-unaligned-store-4.c scan-assembler
vmovups.*movv8sf_internal/4
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=haswell --with-cpu=haswell
Also happens on Silvermont.
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83287] [8 Regression] ice in tsubst_copy, at cp/pt.c:14884
Date: Tue, 05 Dec 2017 12:11:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |nathan at gcc dot gnu.org
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Subject: [Bug testsuite/83281] [8 regression] libgomp.oacc-c-c++-common/reduction-cplx-flt.c and reduction-cplx-dbl.c fail starting with r255335
Date: Tue, 05 Dec 2017 12:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83281
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-12-05
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42795
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42795&action=edit
gcc8-pr83281.patch
Patch I'll test momentarily.
>From gcc-bugs-return-584201-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 12:36:41 2017
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/83284] bootstrap comparison failure in libiberty/stack-limit.o
Date: Tue, 05 Dec 2017 12:36:00 -0000
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
Created attachment 42796
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42796&action=edit
cmp -bl stage2-libiberty/stack-limit.o stage3-libiberty/stack-limit.o
(In reply to Richard Biener from comment #1)
> What's your host compiler? Which section is the difference in?
Host compiler info:
/usr/local/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/i386-apple-darwin10.8.0/8.0.0/lto-wrapper
Target: i386-apple-darwin10.8.0
Configured with: ../configure --disable-werror --disable-werror-always
--enable-languages=c,c++,objc,obj-c++,lto --enable-stage1-checking=release,rtl
-C --with-system-libunwind --enable-secureplt --enable-frame-pointer
--enable-debug --without-isl --disable-host-shared --enable-maintainer-mode
--disable-default-pie --with-ld64 --without-pic --enable-target-optspace
--disable-nls --with-system-zlib --with-libiconv-prefix=/opt/local
--with-gmp=/opt/local --with-mpfr=/opt/local --with-mpc=/opt/local --enable-lto
--enable-libstcxx-time --with-build-config=bootstrap-debug
--with-as=/opt/local/bin/as --with-ld=/opt/local/bin/ld
--with-ar=/opt/local/bin/ar --enable-objc-gc --enable-libada --enable-libssp
CC='/usr/bin/gcc-4.2 -arch i386 -arch x86_64' CXX='/usr/bin/g++-4.2 -arch
x86_64' AR_FOR_TARGET=/opt/local/bin/ar AS_FOR_TARGET=/opt/local/bin/as
LD_FOR_TARGET=/opt/local/bin/ld NM_FOR_TARGET=/opt/local/bin/nm
RANLIB_FOR_TARGET=/opt/local/bin/ranlib STRIP_FOR_TARGET=/opt/local/bin/strip
OTOOL=/opt/local/bin/otool OTOOL64=/opt/local/bin/otool
AUTOCONF=/opt/local/bin/autoconf264 AUTOHEADER=/opt/local/bin/autoheader264
AUTOM4TE=/opt/local/bin/autom4te264 AUTORECONF=/opt/local/bin/autoreconf264
AUTOSCAN=/opt/local/bin/autoscan264 AUTOUPDATE=/opt/local/bin/autoupdate264
IFNAMES=/opt/local/bin/ifnames264 ACLOCAL=/sw/bin/aclocal-1.11
PERL=/opt/local/bin/perl CFLAGS='-pipe -g -Os' CXXFLAGS='-pipe -g -Os
-fcheck-new' CPP='/usr/bin/gcc-4.2 -E' CXXCPP='/usr/bin/g++-4.2 -E'
M4=/opt/local/bin/gm4 : (reconfigured) ../configure --disable-werror
--disable-werror-always --enable-languages=c,c++,objc,obj-c++,lto
--enable-stage1-checking=release,rtl -C --with-system-libunwind
--enable-secureplt --enable-frame-pointer --enable-debug --without-isl
--disable-host-shared --enable-maintainer-mode --disable-default-pie
--with-ld64 --without-pic --enable-target-optspace --disable-nls
--with-system-zlib --with-libiconv-prefix=/opt/local --with-gmp=/opt/local
--with-mpfr=/opt/local --with-mpc=/opt/local --enable-lto
--with-build-config=bootstrap-debug --with-as=/opt/local/bin/as
--with-ld=/opt/local/bin/ld --with-ar=/opt/local/bin/ar --enable-objc-gc
--enable-libada --enable-libssp --disable-libsanitizer CC=/usr/local/bin/gcc
CXX=/usr/local/bin/g++ AR_FOR_TARGET=/opt/local/bin/ar
AS_FOR_TARGET=/opt/local/bin/as LD_FOR_TARGET=/opt/local/bin/ld
NM_FOR_TARGET=/opt/local/bin/nm RANLIB_FOR_TARGET=/opt/local/bin/ranlib
STRIP_FOR_TARGET=/opt/local/bin/strip OTOOL=/opt/local/bin/otool
OTOOL64=/opt/local/bin/otool AUTOCONF=/opt/local/bin/autoconf264
AUTOHEADER=/opt/local/bin/autoheader264 AUTOM4TE=/opt/local/bin/autom4te264
AUTORECONF=/opt/local/bin/autoreconf264 AUTOSCAN=/opt/local/bin/autoscan264
AUTOUPDATE=/opt/local/bin/autoupdate264 IFNAMES=/opt/local/bin/ifnames264
ACLOCAL=/sw/bin/aclocal-1.11 PERL=/opt/local/bin/perl M4=/opt/local/bin/gm4
Thread model: posix
gcc version 8.0.0 20171110 (experimental) (GCC)
Not quite sure how to tell which section the difference is in but I'm attaching
the full cmp -bl output.
>From gcc-bugs-return-584202-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 12:37:42 2017
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Subject: [Bug target/83289] [8 regression] i386/sse2-init-v2di-2.c, i386/avx256-unaligned-load-1.c, i386/avx256-unaligned-store-*.c fails
Date: Tue, 05 Dec 2017 12:37:00 -0000
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Please show output and output from before it failed. And/or some
analysis that shows why current is wrong. Etc. Or even better,
make a patch to fix the testcase ;-)
>From gcc-bugs-return-584203-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 12:43:55 2017
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Subject: [Bug target/83289] [8 regression] i386/sse2-init-v2di-2.c, i386/avx256-unaligned-load-1.c, i386/avx256-unaligned-store-*.c fails
Date: Tue, 05 Dec 2017 12:43:00 -0000
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Ah. It seems to be because the testcases test for /5, /4 etc., which is
now printed as /4 resp. /3, because alternatives start counting at 0.
>From gcc-bugs-return-584204-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 12:51:31 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/83252] [8 Regression] Wrong code with "-march=skylake-avx512 -O3"
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-05
CC| |vmakarov at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|Wrong code with |[8 Regression] Wrong code
|"-march=skylake-avx512 -O3" |with "-march=skylake-avx512
| |-O3"
Ever confirmed|0 |1
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This broke again with r255377.
Testcase in patch form at
https://gcc.gnu.org/ml/gcc-patches/2017-12/msg00133.html
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Subject: [Bug testsuite/82770] [8 regression] gcc.dg/pr78768.c xpass
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Martin?
>From gcc-bugs-return-584206-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 13:04:56 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/82046] [7/8 Regression] Bogus -fsanitize=undefined error with -O2 -Wall
Date: Tue, 05 Dec 2017 13:04:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
At least for warnings that require optimizations in order to avoid false
positives like these, I think you need to accept some false positives with
sanitizers, which necessarily cause fewer optimizations (otherwise they
wouldn't be able to diagnose what they need to). So don't use -Werror with
-fsanitize=undefined...
I'd close this as WONTFIX.
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Subject: [Bug testsuite/82006] [8 Regression] ERROR: torture-init: torture_without_loops is not empty as expected
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Any progress on this?
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Subject: [Bug middle-end/82004] [8 Regression] SPEC CPU2017 628.pop2_s miscompare
Date: Tue, 05 Dec 2017 13:08:00 -0000
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, any progress here?
Has SPEC accepted some fix, or is this still broken?
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Subject: [Bug ipa/82027] [7/8 Regression] wrong code with -O3 -flto
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Martin J., any progress on this?
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Subject: [Bug tree-optimization/83283] [7/8 Regression] Casting from boolean to unsigned char to enum returns incorrect results
Date: Tue, 05 Dec 2017 13:34:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Dec 5 13:33:52 2017
New Revision: 255417
URL: https://gcc.gnu.org/viewcvs?rev=255417&root=gcc&view=rev
Log:
PR tree-optimization/83283
* g++.dg/torture/pr83283.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/torture/pr83283.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug testsuite/83281] [8 regression] libgomp.oacc-c-c++-common/reduction-cplx-flt.c and reduction-cplx-dbl.c fail starting with r255335
Date: Tue, 05 Dec 2017 13:35:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Dec 5 13:34:41 2017
New Revision: 255418
URL: https://gcc.gnu.org/viewcvs?rev=255418&root=gcc&view=rev
Log:
PR testsuite/83281
* testsuite/libgomp.oacc-c-c++-common/reduction-cplx-flt.c (main): Use
j suffix instead of i.
* testsuite/libgomp.oacc-c-c++-common/reduction-cplx-dbl.c (main):
Likewise.
Modified:
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-cplx-dbl.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-cplx-flt.c
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Subject: [Bug testsuite/82006] [8 Regression] ERROR: torture-init: torture_without_loops is not empty as expected
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--- Comment #6 from Rainer Emrich <rainer@emrich-ebersheim.de> ---
(In reply to Jakub Jelinek from comment #5)
> Any progress on this?
No, I'm under heavy workload at the moment. I don't see how to debug this. I
will bisect to find the commit which causes the issue, hopefully very soon.
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Subject: [Bug testsuite/83281] [8 regression] libgomp.oacc-c-c++-common/reduction-cplx-flt.c and reduction-cplx-dbl.c fail starting with r255335
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/82004] [8 Regression] SPEC CPU2017 628.pop2_s miscompare
Date: Tue, 05 Dec 2017 14:04:00 -0000
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--- Comment #13 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Nope. The issue persists.
I don`t know whether anyone reported this to SPEC already, but even if so I
share Richard`s pessimism.
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Subject: [Bug target/82964] gfortran.dg/class_array_1.f03 regression since r254388
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--- Comment #1 from Wilco <wilco at gcc dot gnu.org> ---
*** Bug 82974 has been marked as a duplicate of this bug. ***
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Subject: [Bug target/82974] [8 regression] ICE in extract_insn, at recog.c:2305 on aarch64
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CC| |wilco at gcc dot gnu.org
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--- Comment #2 from Wilco <wilco at gcc dot gnu.org> ---
Duplicate, same issue with movti not using literal pool when complex.
*** This bug has been marked as a duplicate of bug 82964 ***
>From gcc-bugs-return-584217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 14:34:06 2017
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From: "abigail.buccaneer at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83290] New: Expressions in anonymous unions inside class templates can't reference the union's members
Date: Tue, 05 Dec 2017 14:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83290
Bug ID: 83290
Summary: Expressions in anonymous unions inside class templates
can't reference the union's members
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: abigail.buccaneer at gmail dot com
Target Milestone: ---
The following code compiles fine (with -std=c++14):
struct A {
union {
int x;
char y[sizeof(x)];
decltype(x) z;
static_assert(sizeof(y) == sizeof(z), "");
};
};
But fails when the struct is replaced with a struct template and instantiated
as follows:
template <typename> struct T {
union {
int x;
char y[sizeof(x)];
decltype(x) z;
static_assert(sizeof(y) == sizeof(z), "");
};
};
template struct T<void>;
The errors all say essentially the same thing:
<source>:13:23: error: 'int T<void>::<unnamed union>::x' is
inaccessible within this context
char y[sizeof(x)];
~^~
>From gcc-bugs-return-584218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 14:36:52 2017
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From: "wilco at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82964] gfortran.dg/class_array_1.f03 regression since r254388
Date: Tue, 05 Dec 2017 14:36:00 -0000
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Wilco <wilco at gcc dot gnu.org> changed:
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>From gcc-bugs-return-584219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 14:40:47 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/83290] Expressions in anonymous unions inside class templates can't reference the union's members
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Clang and ICC compile it OK.
>From gcc-bugs-return-584220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 14:52:02 2017
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From: "ta12ba34 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/83279] std::experimental::filesystem::copy_file can't copy larger files than 2.0GiB
Date: Tue, 05 Dec 2017 14:52:00 -0000
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--- Comment #2 from T B <ta12ba34 at gmail dot com> ---
(In reply to Jonathan Wakely from comment #1)
> (In reply to T B from comment #0)
> > However, when I compiled it with GCC 5.4.0 (g++ -std=c++14 *.cpp *.h
> > -lstdc++fs) everything works fine and I can copy files with a size of over
> > 2.0GiB.
>
> That's strange, because the code for copy_file is identical.
Then it is really strange. A repetition of my test results in exactly the same
however - with g++ 5.4 it works still fine.
Perhaps it is the fact that I use a prebuild GCC 5.4 and a selfcompiled GCC
7.2.
Could someone else please try it out?
Otherwise I will try to rebuild my GCC 7.2.
It seems that the preprocessed file was too large.
But I can not find anything important inside. If you think there could be
anything inside, I will hand them in later.
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Subject: [Bug testsuite/83289] [8 regression] i386/sse2-init-v2di-2.c, i386/avx256-unaligned-load-1.c, i386/avx256-unaligned-store-*.c fails
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-584222-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 15:11:00 2017
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Subject: [Bug tree-optimization/83277] [8 Regression] [graphite] Wrong code w/ -O2 -floop-nest-optimize
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Dec 5 15:10:23 2017
New Revision: 255424
URL: https://gcc.gnu.org/viewcvs?rev=255424&root=gcc&view=rev
Log:
2017-12-05 Richard Biener <rguenther@suse.de>
PR tree-optimization/83277
* graphite-isl-ast-to-gimple.c (should_copy_to_new_region): Make sure
to code-gen liveout vars.
* gcc.dg/graphite/pr83277.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/graphite/pr83277.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/graphite-isl-ast-to-gimple.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/83277] [8 Regression] [graphite] Wrong code w/ -O2 -floop-nest-optimize
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed. Thanks for reporting.
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Subject: [Bug tree-optimization/81945] [8 Regression] ICE in operator[], at vec.h:749
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42797
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42797&action=edit
gcc8-pr81945.patch
Untested fix.
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Subject: [Bug rtl-optimization/83162] [6/7/8 Regression] x86-64 -Wclobbered issuing more false alarms (regression)
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Both warnings are emitted starting with r235980. The first one appeared with
r226901.
>From gcc-bugs-return-584226-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 15:23:22 2017
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From: "sergey.shalnov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
Date: Tue, 05 Dec 2017 15:23:00 -0000
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sergey.shalnov at intel dot com changed:
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----------------------------------------------------------------------------
CC| |sergey.shalnov at intel dot com
--- Comment #4 from sergey.shalnov at intel dot com ---
Richard,
I can confirm that the issue exists and it can be solved by make data types of
accumulator and equation equal.
As I can see you propose to introduce intermediate internal accumulator in
uint32 type and store it into accumulator (int) later. Please correct me if I'm
wrong.
Anyway, may I, please, propose a bit simpler way to solve the issue?
In GIMPLE statement we have (in the place of reduction tree-vect=loop.c:2877):
"sum_12 = (int) _6;"
I believe the issue disappears if we change it to:
"sum_12 = _6;"
I'm not sure but, if I remember correctly, the C standard treat these types
(uint->int) casting as "undefined behavior". In this case, the compiler can do
this type cast(it might be under some command line switches).
What do you think, could it help?
Sergey
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Subject: [Bug middle-end/81897] [6/7/8 Regression] spurious -Wmaybe-uninitialized warning
Date: Tue, 05 Dec 2017 15:59:00 -0000
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I don't think improving the threader (which is strictly an optimization, and
might not be beneficial/desirable in many cases, if it e.g. needs copying large
amounts of code) is the way to go here. The tree-ssa-uninit.c code doesn't try
to solve this issue at all, it is about
if (cond)
v = something;
some_code;
if (cond)
use (v);
where the 2 conditions might not be identical, but the latter needs to be a
subset of the former. While in this case, it is:
if (cond)
v = something;
some_code;
if (!cond)
v = something_else;
use (v);
i.e. the use is unconditional, but the set is in the end also unconditional.
On the other side, we don't warn for:
int bar (int);
int
foo (int x)
{
int a;
if (x)
a = bar (0);
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (1))))))))))));
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (2))))))))))));
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (3))))))))))));
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (4))))))))))));
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (5))))))))))));
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (6))))))))))));
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (7))))))))))));
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (8))))))))))));
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (9))))))))))));
if (!x)
a = bar (10);
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (11))))))))))));
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (12))))))))))));
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (13))))))))))));
bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (14))))))))))));
return a;
}
which simulates large amounts of code that should make the threader punt.
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/83291] New: [8 regression] libgomp.oacc-c-c++-common/reduction-cplx-dbl.c, libgomp.oacc-c-c++-common/reduction-cplx-flt.c fails
Date: Tue, 05 Dec 2017 16:00:00 -0000
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Bug ID: 83291
Summary: [8 regression]
libgomp.oacc-c-c++-common/reduction-cplx-dbl.c,
libgomp.oacc-c-c++-common/reduction-cplx-flt.c fails
Product: gcc
Version: 8.0
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CC: jakub at gcc dot gnu.org
Target Milestone: ---
r255335 triggers these fails:
---
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/ -x c++
/source/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c
-B/work/x86_64-pc-linux-gnu/./libgomp/
-B/work/x86_64-pc-linux-gnu/./libgomp/.libs
-I/work/x86_64-pc-linux-gnu/./libgomp -I/source/libgomp/testsuite/../../include
-I/source/libgomp/testsuite/.. -fmessage-length=0 -fno-diagnostics-show-caret
-Wno-hsa -fdiagnostics-color=never -fopenacc -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -O2 -nostdinc++
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/source/libstdc++-v3/libsupc++ -I/source/libstdc++-v3/include/backward
-I/source/libstdc++-v3/testsuite/util
-B/work/x86_64-pc-linux-gnu/./libgomp/../libstdc++-v3/src/.libs
-L/work/x86_64-pc-linux-gnu/./libgomp/.libs
-L/work/x86_64-pc-linux-gnu/./libgomp/../libstdc++-v3/src/.libs -lstdc++ -lm -o
./reduction-cplx-dbl.exe
FAIL: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c
-DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -O2 (test for excess errors)
---
spawn -ignore SIGHUP /work/gcc/xgcc -B/work/gcc/ -x c++
/source/libgomp/testsuite/libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-flt.c
-B/work/x86_64-pc-linux-gnu/./libgomp/
-B/work/x86_64-pc-linux-gnu/./libgomp/.libs
-I/work/x86_64-pc-linux-gnu/./libgomp -I/source/libgomp/testsuite/../../include
-I/source/libgomp/testsuite/.. -fmessage-length=0 -fno-diagnostics-show-caret
-Wno-hsa -fdiagnostics-color=never -fopenacc -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -O2 -nostdinc++
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/work/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/source/libstdc++-v3/libsupc++ -I/source/libstdc++-v3/include/backward
-I/source/libstdc++-v3/testsuite/util
-B/work/x86_64-pc-linux-gnu/./libgomp/../libstdc++-v3/src/.libs
-L/work/x86_64-pc-linux-gnu/./libgomp/.libs
-L/work/x86_64-pc-linux-gnu/./libgomp/../libstdc++-v3/src/.libs -lstdc++ -lm -o
./reduction-cplx-flt.exe
FAIL: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-flt.c
-DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 -O2 (test for excess errors)
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto -with-arch=haswell --with-cpu=haswell
Also present on Silvermont.
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Subject: [Bug libgomp/83291] [8 regression] libgomp.oacc-c-c++-common/reduction-cplx-dbl.c, libgomp.oacc-c-c++-common/reduction-cplx-flt.c fails
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What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 83281 ***
>From gcc-bugs-return-584229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 16:04:23 2017
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Subject: [Bug testsuite/83281] [8 regression] libgomp.oacc-c-c++-common/reduction-cplx-flt.c and reduction-cplx-dbl.c fail starting with r255335
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andrey.y.guskov at intel dot com
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 83291 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-584231-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 16:17:46 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/83289] [8 regression] i386/sse2-init-v2di-2.c, i386/avx256-unaligned-load-1.c, i386/avx256-unaligned-store-*.c fails
Date: Tue, 05 Dec 2017 16:17:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Dec 5 16:17:09 2017
New Revision: 255427
URL: https://gcc.gnu.org/viewcvs?rev=255427&root=gcc&view=rev
Log:
PR testsuite/83289
* gcc.target/i386/avx256-unaligned-load-1.c: Adjust for -dp
alternative numbers being 0 based instead of former 1 based.
* gcc.target/i386/avx256-unaligned-store-1.c: Likewise.
* gcc.target/i386/avx256-unaligned-store-2.c: Likewise.
* gcc.target/i386/avx256-unaligned-store-3.c: Likewise.
* gcc.target/i386/avx256-unaligned-store-4.c: Likewise.
* gcc.target/i386/sse2-init-v2di-2.c: Likewise.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/avx256-unaligned-load-1.c
trunk/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-1.c
trunk/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-2.c
trunk/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-3.c
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trunk/gcc/testsuite/gcc.target/i386/sse2-init-v2di-2.c
>From gcc-bugs-return-584232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 16:19:14 2017
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Subject: [Bug testsuite/83289] [8 regression] i386/sse2-init-v2di-2.c, i386/avx256-unaligned-load-1.c, i386/avx256-unaligned-store-*.c fails
Date: Tue, 05 Dec 2017 16:19:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-584233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 16:29:01 2017
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/81897] [6/7/8 Regression] spurious -Wmaybe-uninitialized warning
Date: Tue, 05 Dec 2017 16:29:00 -0000
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--- Comment #5 from Jeffrey A. Law <law at redhat dot com> ---
It really depends on the growth necessary to expose the thread. I haven't
tried to evaluate that -- clearly if the code growth is unacceptable then
threading is the wrong answer.
In general we should start each investigation of this kind of bug with an
analysis of what the threader has missed and the pros/cons of addressing the
missed thread.
IMHO tree-ssa-uninit.c's job is really to deal with cases where we don't want
to thread (usually because of code growth concerns, but there are others).
>From gcc-bugs-return-584234-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 16:31:33 2017
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Subject: [Bug tree-optimization/83026] missing strlen optimization for strcmp of unequal strings
Date: Tue, 05 Dec 2017 16:31:00 -0000
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--- Comment #4 from Qing Zhao <qing.zhao at oracle dot com> ---
Note, this optimization is only valid when the result of the strcmp is used to
compare with zero.
>From gcc-bugs-return-584235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 16:33:28 2017
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Subject: [Bug c/78768] -Walloca-larger-than and -Wformat-length warnings disabled by -flto
Date: Tue, 05 Dec 2017 16:33:00 -0000
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--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
The test was changed to link-only (to exercise LTO) in r244385.
>From gcc-bugs-return-584236-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 16:33:30 2017
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From: "ramana at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82248] probe_stack can generate unpredictable STR on arm
Date: Tue, 05 Dec 2017 16:33:00 -0000
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--- Comment #6 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Author: ramana
Date: Tue Dec 5 16:32:55 2017
New Revision: 255428
URL: https://gcc.gnu.org/viewcvs?rev=255428&root=gcc&view=rev
Log:
[Patch ARM] Fix probe_stack constraint.
The probe_stack pattern uses r0 as a fixed register. This can cause issues if
we have auto-increment instructions coming out that have r0 as the base
register.
Tested with a bootstrap and regression run. richi reports that the original
issue was fixed in the run. I did consider whether probe_stack_range was
affected but it all comes back to probe_stack pattern so I think we are ok.
I don't have a testcase that seems to provoke this but it seems to be default
on most distributions so I'm expecting the testcoverage to come from there.
Applied.
Ramana
PR target/82248
* config/arm/arm.md (probe_stack) : Use the 'o' constraint.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/arm.md
>From gcc-bugs-return-584238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 16:35:43 2017
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Subject: [Bug c++/80038] [6/7 Regression] Random segfault using local vectors in Cilk function
Date: Tue, 05 Dec 2017 16:35:00 -0000
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--- Comment #37 from Jeffrey A. Law <law at redhat dot com> ---
There are no plans to backport any additional Cilk+ changes/fixes to the
release branches.
>From gcc-bugs-return-584237-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 16:35:12 2017
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Subject: [Bug target/78117] gcc on tilegx builds faulty strstr() function (from glibc)
Date: Tue, 05 Dec 2017 16:35:00 -0000
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Chris Metcalf <cmetcalf at mellanox dot com> changed:
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----------------------------------------------------------------------------
CC| |cmetcalf at mellanox dot com
--- Comment #6 from Chris Metcalf <cmetcalf at mellanox dot com> ---
This is believed to be due to a bug in the architecture-independent code that
optimizes vector (SIMD) ops. A smaller test case:
unsigned long test(unsigned long a, unsigned long b)
{
unsigned long result = __insn_v1cmpeq(a, 0);
result >>= 8;
return result;
}
This will correctly emit the v1cmpeq and a right shift at -O0, but at higher
levels the v1cmpeq is optimized away and replaced with a zero, thus also
causing the right shift to be optimized away, and the function just returns
zero. Without the right shift, the v1cmpeq is preserved at all optimization
levels.
>From gcc-bugs-return-584239-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 16:45:38 2017
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Subject: [Bug tree-optimization/81165] [8 Regression] Regression in GCC-8.0.0's optimizer
Date: Tue, 05 Dec 2017 16:45:00 -0000
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--- Comment #12 from Jeffrey A. Law <law at redhat dot com> ---
In general we can't know if we're going to have a single argument PHI after
threading. If the block has multiple preds that thread to the same final
destination, then we create a single copy and vector all the preds into that
single copy.
However, there the obvious special case. If the block starts with just 2
preds, then any PHIs will be single argument PHIs in the copy. That's probably
enough to address this particular BZ. I don't think that's enough to address
the older BZ in this space though.
>From gcc-bugs-return-584240-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 16:55:18 2017
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Subject: [Bug middle-end/83239] False positive from -Wstringop-overflow on simple std::vector code
Date: Tue, 05 Dec 2017 16:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83239
Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |redi at gcc dot gnu.org
--- Comment #8 from Jeffrey A. Law <law at redhat dot com> ---
Jon's call on the annotation, obviously.
In theory that kind of annotation should be zero cost as there is no code on
the __builtin_unreachable path which in turn allows the various optimizers to
remove the __builtin_unreachable as well as the controlling condition.
I know from recent work a __builtin_unreachable like this can sneak through the
gimple optimizers. But it was a pretty oddball case involving computed jumps
where the computed jump target was an empty __builtin_unreachable block.
Similarly I just fixed a bug where the ranges implied by the
__builtin_unreachables were getting lost.
My point for Jon is that while these are supposed to be zero cost ways to
describe situations that aren't supposed to happen, a little verification seems
wise :-)
>From gcc-bugs-return-584241-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 05 17:09:33 2017
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[not found] <bug-83027-4@http.gcc.gnu.org/bugzilla/>
2017-11-17 15:01 ` [Bug ada/83027] Hang when attaching a SIGINT handler porton at narod dot ru
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