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* [Bug c++/87713] single character underlined in an error message instead of the whole token
[not found] <bug-87713-4@http.gcc.gnu.org/bugzilla/>
@ 2018-10-23 18:51 ` msebor at gcc dot gnu.org
2024-04-04 22:24 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 2+ messages in thread
From: msebor at gcc dot gnu.org @ 2018-10-23 18:51 UTC (permalink / raw)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87713
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |error-recovery
CC| |dmalcolm at gcc dot gnu.org
Severity|normal |minor
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
David, you might be interested in this.
>From gcc-bugs-return-618592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 23 18:58:28 2018
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/85669] fail on s-case-cfn-macros: build/gencfn-macros: DEF_INTERNAL_FLT/INT_FN (%smth%) has no associated built-in functions
Date: Tue, 23 Oct 2018 18:58:00 -0000
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--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Is this on all (PowerPC) Darwin? Only one some versions? Which, then?
>From gcc-bugs-return-618593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 23 19:03:13 2018
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From: "ian at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/87661] [9 Regression] libgo bootstrap failure on arm-linux-gnueabihf (redefinition of constants)
Date: Tue, 23 Oct 2018 19:03:00 -0000
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--- Comment #1 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Tue Oct 23 19:02:29 2018
New Revision: 265439
URL: https://gcc.gnu.org/viewcvs?rev=265439&root=gcc&view=rev
Log:
PR go/87661
runtime: remove unused armArch, hwcap and hardDiv
After CL 140057 these are only written but never read in gccgo.
Reviewed-on: https://go-review.googlesource.com/c/141077
Modified:
trunk/gcc/go/gofrontend/MERGE
trunk/libgo/go/runtime/os_linux_arm.go
>From gcc-bugs-return-618594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 23 19:32:15 2018
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From: "development at jordi dot vilar.cat" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87714] New: [8 regresion] ICE on valid C++ code: in type_dependent_expression_p, at cp/pt.c:25178
Date: Tue, 23 Oct 2018 19:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87714
Bug ID: 87714
Summary: [8 regresion] ICE on valid C++ code: in
type_dependent_expression_p, at cp/pt.c:25178
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: development at jordi dot vilar.cat
Target Milestone: ---
Hi,
The issue appeared in g++ 8. It compiles ok in g++ 7.3, clang 6.0 and
VisualC++.
$> g++-8 -v -std=c++17 -c repro.cpp
Using built-in specs.
COLLECT_GCC=g++-8
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
8.2.0-1ubuntu2~18.04' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--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 8.2.0 (Ubuntu 8.2.0-1ubuntu2~18.04)
COLLECT_GCC_OPTIONS='-v' '-std=c++17' '-c' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/8/cc1plus -quiet -v -imultiarch x86_64-linux-gnu
-D_GNU_SOURCE repro.cpp -quiet -dumpbase repro.cpp -mtune=generic -march=x86-64
-auxbase repro -std=c++17 -version -fstack-protector-strong -Wformat
-Wformat-security -o /tmp/ccmOu14n.s
GNU C++17 (Ubuntu 8.2.0-1ubuntu2~18.04) version 8.2.0 (x86_64-linux-gnu)
compiled by GNU C version 8.2.0, GMP version 6.1.2, MPFR version 4.0.1,
MPC version 1.1.0, isl version isl-0.19-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/8"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/8/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/8
/usr/include/x86_64-linux-gnu/c++/8
/usr/include/c++/8/backward
/usr/lib/gcc/x86_64-linux-gnu/8/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/8/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C++17 (Ubuntu 8.2.0-1ubuntu2~18.04) version 8.2.0 (x86_64-linux-gnu)
compiled by GNU C version 8.2.0, GMP version 6.1.2, MPFR version 4.0.1,
MPC version 1.1.0, isl version isl-0.19-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: b531b606e797d462fe15d91f526b9496
repro.cpp: In instantiation of ‘static std::optional<_Tp> enum_helper<T,
is_bitmask>::to_enum(std::basic_string_view<char, U>) [with U =
std::char_traits<char>; T = my_enum_type; bool is_bitmask = true]’:
repro.cpp:34:113: required from here
repro.cpp:31:31: internal compiler error: in type_dependent_expression_p, at
cp/pt.c:25178
return parse_my_enum_type(syntax, { string.data(), string.size() });
^~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-8/README.Bugs> for instructions.
repro.cpp ----------------------
#include <optional>
#include <regex>
#include <string_view>
template<typename T, bool is_bitmask = true> struct enum_helper
{
template<class U> static std::optional<T>
to_enum(std::basic_string_view<char, U> s);
};
template<class C> struct icase_char_traits : public std::char_traits<C>
{
static bool eq(C c1, C c2);
static bool lt(C c1, C c2);
static int compare(const C* s1, const C* s2, size_t n);
static const C* find(const C* s, size_t n, C a);
};
using ci_string_view = std::basic_string_view<char, icase_char_traits<char>>;
enum class my_enum_type : std::uint32_t;
template<> template<typename U> std::optional<my_enum_type>
enum_helper<my_enum_type, true>::to_enum(std::basic_string_view<char, U> s);
std::optional<my_enum_type> parse_my_enum_type(const std::regex &syntax,
std::string_view string);
template<> template<typename U> std::optional<my_enum_type>
enum_helper<my_enum_type>::to_enum(std::basic_string_view<char, U> string)
{
static const std::regex syntax(
R"(^...$)",
std::is_same_v<U, icase_char_traits<char>> ? std::regex::ECMAScript |
std::regex::icase : std::regex::ECMAScript);
return parse_my_enum_type(syntax, { string.data(), string.size() });
}
template std::optional<my_enum_type>
enum_helper<my_enum_type>::to_enum<std::char_traits<char>>(std::string_view);
template std::optional<my_enum_type>
enum_helper<my_enum_type>::to_enum<icase_char_traits<char>>(ci_string_view);
>From gcc-bugs-return-618595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 23 19:32:33 2018
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Subject: [Bug target/85669] fail on s-case-cfn-macros: build/gencfn-macros: DEF_INTERNAL_FLT/INT_FN (%smth%) has no associated built-in functions
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--- Comment #9 from Douglas Mencken <dougmencken at gmail dot com> ---
(In reply to Segher Boessenkool from comment #8)
> Is this on all (PowerPC) Darwin? Only one some versions? Which, then?
I am really not going to check it on OS X 10.0 or OS X Beta, or even OS X 10.2.
It fails on OS X 10.5 and OS X 10.4. It fails when it’s built via GCCs bundled
with Xcode, 4.0.1 and 4.2.1, as well as with self-built GCCs like 7.3.0 patched
and 6.4.0. It fails on stage2, in words: stage TWO, and stage1 ( stage ONE,
that one which depends on stage0, id est system, compiler ) is okay
>From gcc-bugs-return-618596-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 23 19:41:59 2018
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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++/87714] [8/9 Regression] ICE on valid C++ code: in type_dependent_expression_p, at cp/pt.c:25178
Date: Tue, 23 Oct 2018 19:41:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-10-23
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |8.3
Summary|[8 regresion] ICE on valid |[8/9 Regression] ICE on
|C++ code: in |valid C++ code: in
|type_dependent_expression_p |type_dependent_expression_p
|, at cp/pt.c:25178 |, at cp/pt.c:25178
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug c++/87714] [8/9 Regression] ICE on valid C++ code: in type_dependent_expression_p, at cp/pt.c:25178
Date: Tue, 23 Oct 2018 19:47:00 -0000
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r249323.
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Subject: [Bug c/87691] transparent_union attribute does not work with MODE_PARTIAL_INT
Date: Tue, 23 Oct 2018 19:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
--- Comment #9 from Jozef Lawrynowicz <jozef.l at mittosystems dot com> ---
Patch submitted: https://gcc.gnu.org/ml/gcc-patches/2018-10/msg01459.html
>From gcc-bugs-return-618599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 23 19:57:19 2018
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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/85669] fail on s-case-cfn-macros: build/gencfn-macros: DEF_INTERNAL_FLT/INT_FN (%smth%) has no associated built-in functions
Date: Tue, 23 Oct 2018 19:57:00 -0000
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--- Comment #10 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Thanks Douglas, no that is fine of course :-) What I wanted to know is, does
it fail for the newest versions as well. So it appears it does. Which Ryan
already said but I have trouble reading apparently :-/
Thanks for the report!
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From: "ian at airs dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/87661] [9 Regression] libgo bootstrap failure on arm-linux-gnueabihf (redefinition of constants)
Date: Tue, 23 Oct 2018 20:01:00 -0000
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Ian Lance Taylor <ian at airs dot com> changed:
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--- Comment #2 from Ian Lance Taylor <ian at airs dot com> ---
Should be fixed now.
>From gcc-bugs-return-618601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 23 20:43:59 2018
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/87715] New: problems with asan and -O3 build of ada
Date: Tue, 23 Oct 2018 20:43:00 -0000
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Bug ID: 87715
Summary: problems with asan and -O3 build of ada
Product: gcc
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I just tried to build the ada compiler with address sanitizer
and -O3 on recent gcc trunk.
Configure script is
../trunk/configure --prefix=/home/dcb/gcc/results.265434.asan \
--with-build-config=bootstrap-asan \
--disable-multilib \
--disable-werror \
--enable-checking=release \
--enable-languages=c,c++,fortran,ada
sed 's/-O2/-O3 -Wlogical-op/' < Makefile > Makefile.tmp
mv Makefile.tmp Makefile
I get error messages:
$ egrep "^Config|ERROR:" mk.out
...
Configuring stage 3 in ./libdecnumber
Configuring stage 3 in ./libcpp
Configuring stage 3 in ./gcc
=================================================================
==14774==ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address
0x7ffe9efa6587 at pc 0x000001cf4660 bp 0x7ffe9efa5e70 sp 0x7ffe9efa5e68
READ of size 1 at 0x7ffe9efa6587 thread T0
=================================================================
==14775==ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address
0x7ffde98d1027 at pc 0x000001cf4660 bp 0x7ffde98d0910 sp 0x7ffde98d0908
READ of size 1 at 0x7ffde98d1027 thread T0
=================================================================
==14779==ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address
0x7ffcb7f760a7 at pc 0x000001cf4660 bp 0x7ffcb7f75980 sp 0x7ffcb7f75978
READ of size 1 at 0x7ffcb7f760a7 thread T0
I suspect the -O3 might be causing a problem. I'll have another
go at building with -O2, not -O3.
>From gcc-bugs-return-618602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 23 22:16:37 2018
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87689] Memory corruption on Power 8
Date: Tue, 23 Oct 2018 22:16:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I checked, and it seems that this is an old bug; it occurs both
with gfortran 4.8.5 and 8.1.0.
This goes away with -flto or if you put both procedures into one file,
and does not happen on Linux.
Tree dump looks reasonable with 8.1:
static integer(kind=4) C.2183 = 1;
static integer(kind=4) C.2184 = 2;
static integer(kind=4) C.2185 = 3;
static integer(kind=4) C.2186 = 4;
static integer(kind=4) C.2187 = 5;
static integer(kind=4) C.2188 = 6;
character(kind=1) str.0[20];
doesntwork_p8 ((character(kind=1)[1:20] *) &str.0, 20, &c, &C.2183,
&C.2184, &C.2185, &C.2186, &C.2187, &C.2188, 1);
__builtin_memmove ((void *) &res, (void *) &str.0, 20);
vs.
doesntwork_p8 (character(kind=1)[1:20] & __result, integer(kind=8) .__result,
character(kind=1)[1:1] & restrict c, integer(kind=4) & restrict a1,
integer(kind=4) & restrict a2, integer(kind=4) & restrict a3, integer(kind=4) &
restrict a4, integer(kind=4) & restrict a5, integer(kind=4) & restrict a6,
integer(kind=8) _c)
{
What looks less reasonable is the debug output:
breakpoint 1, doesntwork_p8 (__result=@0x3fffffffed80:
'\224\016\000\020\000\000\000\000\230\016\000\020\000\000\000\000\000\000\000\000',
.__result=20, c='`', a1=1, a2=2, a3=3, a4=4, a5=5,
a6=<error reading variable: Cannot access memory at address 0x0>, _c=0) at
b.f90:6
This looks like the arguments pushed on the stack somehow have the wrong number
of bytes...
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87689] Memory corruption on Power 8
Date: Tue, 23 Oct 2018 22:36:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #3)
> This goes away with -flto or if you put both procedures into one file,
> and does not happen on Linux.
I meant on x86_64.
Wild guess: Do we somehow get the declarations wrong (or different) and this
shows up because we trigger some difference in the POWER ABI?
Segher, does this maybe ring a bell?
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Subject: [Bug fortran/87648] Clobber some variables on entry to DO CONCURRENT
Date: Tue, 23 Oct 2018 22:40:00 -0000
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--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Some more food for thought - what if there is only a single iteration?
>From gcc-bugs-return-618605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 23 22:54:10 2018
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From: "wilson at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87690] [RISCV][ABI] GCC fails to sign-extend floats passed in the lp64 ABI
Date: Tue, 23 Oct 2018 22:54:00 -0000
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Jim Wilson <wilson at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-10-23
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Ever confirmed|0 |1
--- Comment #4 from Jim Wilson <wilson at gcc dot gnu.org> ---
I think the intent of the second rule is that float values are passed in the
same regs as an integer value, and that it wasn't the intent that the promotion
rule also applied to float values.
The GCC RISC-V port is passing 32-bit floats as SFmode, which means only the
low 32-bits of the value are valid. A struct with a single float field also
gets treated as SFmode, so that we can directly access the float member.
riscv_function_arg isn't checking the argument type, it is only checking the
argument mode. Hence, a float and a struct with a single float member get
handled exactly the same. Since they are passed the same, there is no
conversion code to go from one to the other.
We would have the exact same problem with a struct with a single int field,
except that PROMOTE_MODE forces SImode to be handled as DImode, and the
promote_mode function does check types, and only applies PROMOTE_MODE to
integer types. Hence, a struct with single int field is SImode and an int is
DImode, and we require conversion code which does the sign extension called for
by the ABI. But PROMOTE_MODE is only sensible for integral types, so this
can't solve the float problem.
I don't see any point to trying to sign extend a 32-bit float in a 64-bit
integer register. There are only a few useful things one can do to a float in
an integer register, such as absolute value and signbit, and having the value
be sign extended doesn't help there. For instance given
#include <math.h>
float sub (float a)
{
return fabs (a);
}
and compiling with riscv64-unknown-elf-gcc -O2 -S -mabi=lp64 -march=rv64i I get
sub:
slli a0,a0,33
srli a0,a0,33
ret
The upper 32-bits of a0 are being treated as don't care bits for both the
argument and the return value. They are ignored for the input value, and set
to 0 for the return value. Having the value sign-extended doesn't make this
code any simpler. I see that we aren't actually optimizing signbit as we
should be, but again having it sign-extended doesn't give shorter code.
Requiring that float values be sign extended in a 64-bit reg might require
emitting extra instructions in some cases, which could reduce performance. So
it also seems unwise from that point of view. Consider this testcase for
instance
struct float_struct { float v; float w;};
struct float_struct callee(float, float);
struct float_struct caller(struct float_struct fs) {
return callee(fs.v, fs.w);
}
Compiled with riscv64-unknown-elf-gcc -O2 -S -mabi=lp64 I get
caller:
addi sp,sp,-32
sd a0,8(sp)
srli a1,a0,32
addi sp,sp,32
tail callee
The 2-float struct is passed entirely in a0. Since the upper 32-bits of a
float arg are don't care bits, we can pass a0 directly to callee unchanged.
The second arg for callee is extracted from the upper bits of a0 with a logical
shift that zero extends it. We could change the logical shift to an arithmetic
shift at no cost. But sign-extending the float a0 would require adding two
shift instructions.
I am also concerned that there might be implementation problems trying to
convince gcc to sign-extend floating point values in integer registers, as that
isn't a natural thing to do.
I think the simplest solution here is to update the psABI to indicate that
float values in integer registers are not sign extended. Or alternatively that
the sign extension rule only applies to integer types.
>From gcc-bugs-return-618606-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 23 23:13:59 2018
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From: "andrew at sifive dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87690] [RISCV][ABI] GCC fails to sign-extend floats passed in the lp64 ABI
Date: Tue, 23 Oct 2018 23:13:00 -0000
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--- Comment #5 from Andrew Waterman <andrew at sifive dot com> ---
FWIW, I agree with your last paragraph
On Wed, Oct 24, 2018 at 7:54 AM wilson at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87690
>
> Jim Wilson <wilson at gcc dot gnu.org> changed:
>
> What |Removed |Added
>
> ----------------------------------------------------------------------------
> Status|UNCONFIRMED |NEW
> Last reconfirmed| |2018-10-23
> Assignee|unassigned at gcc dot gnu.org |wilson at gcc dot
> gnu.org
> Ever confirmed|0 |1
>
> --- Comment #4 from Jim Wilson <wilson at gcc dot gnu.org> ---
> I think the intent of the second rule is that float values are passed in
> the
> same regs as an integer value, and that it wasn't the intent that the
> promotion
> rule also applied to float values.
>
> The GCC RISC-V port is passing 32-bit floats as SFmode, which means only
> the
> low 32-bits of the value are valid. A struct with a single float field
> also
> gets treated as SFmode, so that we can directly access the float member.
> riscv_function_arg isn't checking the argument type, it is only checking
> the
> argument mode. Hence, a float and a struct with a single float member get
> handled exactly the same. Since they are passed the same, there is no
> conversion code to go from one to the other.
>
> We would have the exact same problem with a struct with a single int field,
> except that PROMOTE_MODE forces SImode to be handled as DImode, and the
> promote_mode function does check types, and only applies PROMOTE_MODE to
> integer types. Hence, a struct with single int field is SImode and an int
> is
> DImode, and we require conversion code which does the sign extension
> called for
> by the ABI. But PROMOTE_MODE is only sensible for integral types, so this
> can't solve the float problem.
>
> I don't see any point to trying to sign extend a 32-bit float in a 64-bit
> integer register. There are only a few useful things one can do to a
> float in
> an integer register, such as absolute value and signbit, and having the
> value
> be sign extended doesn't help there. For instance given
> #include <math.h>
>
> float sub (float a)
> {
> return fabs (a);
> }
> and compiling with riscv64-unknown-elf-gcc -O2 -S -mabi=lp64 -march=rv64i
> I get
> sub:
> slli a0,a0,33
> srli a0,a0,33
> ret
> The upper 32-bits of a0 are being treated as don't care bits for both the
> argument and the return value. They are ignored for the input value, and
> set
> to 0 for the return value. Having the value sign-extended doesn't make
> this
> code any simpler. I see that we aren't actually optimizing signbit as we
> should be, but again having it sign-extended doesn't give shorter code.
>
> Requiring that float values be sign extended in a 64-bit reg might require
> emitting extra instructions in some cases, which could reduce
> performance. So
> it also seems unwise from that point of view. Consider this testcase for
> instance
> struct float_struct { float v; float w;};
>
> struct float_struct callee(float, float);
>
> struct float_struct caller(struct float_struct fs) {
> return callee(fs.v, fs.w);
> }
> Compiled with riscv64-unknown-elf-gcc -O2 -S -mabi=lp64 I get
> caller:
> addi sp,sp,-32
> sd a0,8(sp)
> srli a1,a0,32
> addi sp,sp,32
> tail callee
> The 2-float struct is passed entirely in a0. Since the upper 32-bits of a
> float arg are don't care bits, we can pass a0 directly to callee
> unchanged.
> The second arg for callee is extracted from the upper bits of a0 with a
> logical
> shift that zero extends it. We could change the logical shift to an
> arithmetic
> shift at no cost. But sign-extending the float a0 would require adding two
> shift instructions.
>
> I am also concerned that there might be implementation problems trying to
> convince gcc to sign-extend floating point values in integer registers, as
> that
> isn't a natural thing to do.
>
> I think the simplest solution here is to update the psABI to indicate that
> float values in integer registers are not sign extended. Or alternatively
> that
> the sign extension rule only applies to integer types.
>From gcc-bugs-return-618607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Oct 23 23:45:38 2018
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From: "asb at lowrisc dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87690] [RISCV][ABI] GCC fails to sign-extend floats passed in the lp64 ABI
Date: Tue, 23 Oct 2018 23:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87690
--- Comment #6 from Alex Bradbury <asb at lowrisc dot org> ---
(In reply to Jim Wilson from comment #4)
> I think the intent of the second rule is that float values are passed in the
> same regs as an integer value, and that it wasn't the intent that the
> promotion rule also applied to float values.
Maybe. Given the looseness of the phrasing I expect signext vs anyext just
wasn't thought about.
First of all, many thanks for such a detailed response. I'm completely happy
with seeing the psABI doc updated so that floats passed via the integer calling
convention are anyext. On the LLVM side, I think it's actually not too
difficult to enforce sign-extension of floats passed in -mabi=lp64. But there's
definitely effort in thoroughly testing it works in all cases. Plus changing
nothing is even simpler.
I also don't see value in enforcing that floats are sign-extended. Lets fix the
psABI docs. I've made a PR to do so
https://github.com/riscv/riscv-elf-psabi-doc/pull/82
>From gcc-bugs-return-618608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 00:02:59 2018
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87689] Memory corruption on Power 8
Date: Wed, 24 Oct 2018 00:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87689
--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
No, doesn't ring bells. But I have some more input:
I couldn't get it to fail on powerpc64-linux.
It fails on powerpc64le-linux only if the second file is compiled with -O0.
As output I get just
$ ./87689 |xxd -g1
0000000: 20 20 20 20 20 20 20 20 20 20 20 31 20 20 20 20 1
0000010: 20 20 20 20 20 20 20 32 20 20 20 20 20 20 20 20 2
0000020: 20 20 20 33 20 20 20 20 20 20 20 20 20 20 20 34 3 4
0000030: 20 20 20 20 20 20 20 20 20 20 20 35 20 20 20 20 5
0000040: 20 20 20 20 20 20 20 30 0a 20 00 0a 20 66 6f 6f 0. .. foo
0000050: 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
0000060: 20 0a
so no weird characters other than a zero byte.
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Subject: [Bug rtl-optimization/87716] New: [9 Regression] FAIL: gcc.target/i386/pr57193.c scan-assembler-times movdqa 2
Date: Wed, 24 Oct 2018 00:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87716
Bug ID: 87716
Summary: [9 Regression] FAIL: gcc.target/i386/pr57193.c
scan-assembler-times movdqa 2
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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CC: segher at gcc dot gnu.org
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On x86, r265398 caused:
FAIL: gcc.target/i386/pr57193.c scan-assembler-times movdqa 2
movdqa (%rdi), %xmm2
pavgb (%rsi), %xmm2
movdqa %xmm0, %xmm3 <<<?
movdqa %xmm2, %xmm0 <<<?
punpckhbw %xmm1, %xmm2
punpcklbw %xmm1, %xmm0
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Subject: [Bug rtl-optimization/87717] New: [9 Regression] FAIL: gcc.target/i386/avx512vl-concatv2si-1.c scan-assembler vpunpckldq[^\n\r]*%xmm17[^\n\r]*%xmm16[^\n\r]*%xmm3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87717
Bug ID: 87717
Summary: [9 Regression] FAIL:
gcc.target/i386/avx512vl-concatv2si-1.c scan-assembler
vpunpckldq[^\n\r]*%xmm17[^\n\r]*%xmm16[^\n\r]*%xmm3
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: segher at gcc dot gnu.org
Target Milestone: ---
Target: x86-64
On x86-64, r265398 caused:
FAIL: gcc.target/i386/avx512vl-concatv2si-1.c scan-assembler
vpunpckldq[^\n\r]*%xmm17[^\n\r]*%xmm16[^\n\r]*%xmm3
Before:
f1:
.LFB0:
.cfi_startproc
movl %edi, -4(%rsp)
vmovd -4(%rsp), %xmm16
movl %esi, -4(%rsp)
vmovd -4(%rsp), %xmm17
vpunpckldq %xmm17, %xmm16, %xmm3
ret
.cfi_endproc
.LFE0:
.size f1, .-f1
After:
f1:
.LFB0:
.cfi_startproc
movl %edi, -4(%rsp)
vmovd -4(%rsp), %xmm16
movl %esi, -4(%rsp)
vmovd -4(%rsp), %xmm17
vmovd %xmm17, %eax
vmovdqa32 %zmm16, %zmm0
vmovd %xmm16, -4(%rsp)
vpinsrd $1, %eax, %xmm0, %xmm3
ret
.cfi_endproc
.LFE0:
.size f1, .-f1
>From gcc-bugs-return-618612-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 00:32:09 2018
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Subject: [Bug rtl-optimization/87718] New: [9 Regression] FAIL: gcc.target/i386/avx512dq-concatv2si-1.c
Date: Wed, 24 Oct 2018 00:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87718
Bug ID: 87718
Summary: [9 Regression] FAIL:
gcc.target/i386/avx512dq-concatv2si-1.c
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: segher at gcc dot gnu.org
Target Milestone: ---
Target: x86-64
On x86, r265398 caused:
FAIL: gcc.target/i386/avx512dq-concatv2si-1.c scan-assembler-times
vpinsrd[^\n\r]*\\$1[^\n\r]*%xmm16[^\n\r]*%xmm3 2
FAIL: gcc.target/i386/avx512dq-concatv2si-1.c scan-assembler
vpunpckldq[^\n\r]*%xmm17[^\n\r]*%xmm16[^\n\r]*%xmm3
Before:
.file "avx512dq-concatv2si-1.c"
.text
.p2align 4
.globl f1
.type f1, @function
f1:
.LFB0:
.cfi_startproc
movl %edi, -4(%rsp)
vmovd -4(%rsp), %xmm16
movl %esi, -4(%rsp)
vmovd -4(%rsp), %xmm17
vpunpckldq %xmm17, %xmm16, %xmm3
ret
.cfi_endproc
.LFE0:
.size f1, .-f1
After:
.file "avx512dq-concatv2si-1.c"
.text
.p2align 4
.globl f1
.type f1, @function
f1:
.LFB0:
.cfi_startproc
movl %edi, -4(%rsp)
vmovd -4(%rsp), %xmm16
movl %esi, -4(%rsp)
vmovd -4(%rsp), %xmm17
vmovd %xmm17, %eax
vpinsrd $1, %eax, %xmm16, %xmm3
ret
.cfi_endproc
.LFE0:
.size f1, .-f1
>From gcc-bugs-return-618613-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 01:20:02 2018
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Subject: [Bug inline-asm/63900] memory constrains needlessly doing memory clobber
Date: Wed, 24 Oct 2018 01:20:00 -0000
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--- Comment #9 from Christopher Head <headch at gmail dot com> ---
I had to use slightly different code because I only have an ARM cross-compiler
version 8.2.0 installed, so I used this:
void g(unsigned char x);
struct MyStruct {
char foo[8];
};
unsigned char buffer[100], buffer2[100];
void f(void) {
buffer2[5] = 'X';
struct MyStruct *p = (void *) buffer;
asm volatile("nop" : "=m" (*p));
g(buffer2[5]);
}
No matter what I changed the size of the foo array in MyStruct to (I tried 8,
15, 13, and 257), this was always the disassembly:
00000000 <f>:
0: 4a03 ldr r2, [pc, #12] ; (10 <f+0x10>)
2: 2058 movs r0, #88 ; 0x58
4: 4b03 ldr r3, [pc, #12] ; (14 <f+0x14>)
6: 7150 strb r0, [r2, #5]
8: bf00 nop
a: f7ff bffe b.w 0 <g>
a: R_ARM_THM_JUMP24 g
e: bf00 nop
Notice that r0 is loaded at offset 2, then passed into g at offset a, and is
not reloaded from the array. If I change the asm to have a full memory clobber,
an ldrb is inserted between the nop and the b.w, as expected, since then
buffer2 is also clobbered.
So, doesn’t this mean that it *is* properly clobbering only buffer, not
buffer2, regardless of the size of foo?
>From gcc-bugs-return-618614-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 01:21:39 2018
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Subject: [Bug rtl-optimization/87716] [9 Regression] FAIL: gcc.target/i386/pr57193.c scan-assembler-times movdqa 2
Date: Wed, 24 Oct 2018 01:21:00 -0000
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
A slightly older compiler gave
test1:
movdqa (%rdi), %xmm2
pavgb (%rsi), %xmm2
movdqa %xmm2, %xmm3
punpckhbw %xmm1, %xmm2
punpcklbw %xmm1, %xmm3
pmulhuw %xmm0, %xmm2
pmulhuw %xmm0, %xmm3
packuswb %xmm2, %xmm3
movaps %xmm3, (%rdx)
ret
What is so super strange about the current generated code?
>From gcc-bugs-return-618615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 01:37:20 2018
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Subject: [Bug rtl-optimization/87716] [9 Regression] FAIL: gcc.target/i386/pr57193.c scan-assembler-times movdqa 2
Date: Wed, 24 Oct 2018 01:37:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-10-24
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
We currently generate:
test1:
movdqa (%rdi), %xmm2
pavgb (%rsi), %xmm2
movdqa %xmm0, %xmm3
movdqa %xmm2, %xmm0
punpckhbw %xmm1, %xmm2
punpcklbw %xmm1, %xmm0
pmulhuw %xmm3, %xmm2
pmulhuw %xmm3, %xmm0
packuswb %xmm2, %xmm0
movaps %xmm0, (%rdx)
ret
One of
movdqa %xmm0, %xmm3
movdqa %xmm2, %xmm0
is redundant. We should generate
movdqa %xmm2, %xmm3
>From gcc-bugs-return-618616-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 02:04:38 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87719] New: missing warning on printf %s and unterminated array
Date: Wed, 24 Oct 2018 02:04:00 -0000
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Bug ID: 87719
Summary: missing warning on printf %s and unterminated array
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
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GCC 9 issues an unterminated array warning for calls to sprintf but not for the
equivalent calls to printf (of fprintf):
$ cat t.c && gcc -O2 -S -Wall t.c
const char a[] = { 'a', 'b' };
void f (char *d)
{
__builtin_sprintf (d, "%s", a); // warning, good
}
void g (void)
{
__builtin_printf ("%s", a); // missing warning
}
t.c: In function ‘f’:
t.c:5:26: warning: ‘%s’ directive argument is not a nul-terminated string
[-Wformat-overflow=]
5 | __builtin_sprintf (d, "%s", a); // warning, good
| ^~ ~
t.c:1:12: note: referenced argument declared here
1 | const char a[] = { 'a', 'b' };
| ^
>From gcc-bugs-return-618617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 05:06:27 2018
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Subject: [Bug middle-end/59658] Document -f* flags enabled by -Og
Date: Wed, 24 Oct 2018 05:06:00 -0000
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> But it might be misleading (similar to -O0 vs -O2) - enabling for example
> -ftree-pre won't enable PRE for -Og as it has a completely different
> pass pipeline which is not based on -O[123]. Those enumerations are only
> relevant for the 'numbered' optimization levels (excluding -O0).
>
> So we miss to filter options in --help optimizers that can be enabled at all.
It's a place to start at least.
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Subject: [Bug fortran/87707] actual argument to assumed type dummy argument (i.e. type(*)) cannot have type-bound procedures
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87707
Martin Diehl <m.diehl at mpie dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Martin Diehl <m.diehl at mpie dot de> ---
Contrary to my previous statement, the behavior of gfortran is in agreement
eith the F2018 draft.
15.5.2.4 (Argument association > Ordinary dummy variables) states:
"If the actual argument is of a derived type that has type parameters,
type-bound procedures, or final subroutines, the dummy argument shall not be
assumed type."
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Subject: [Bug tree-optimization/87665] [6/7/8/9 Regression] gcc HEAD (svn: 265340) breaks elements on resize
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87665
--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 24 06:52:45 2018
New Revision: 265452
URL: https://gcc.gnu.org/viewcvs?rev=265452&root=gcc&view=rev
Log:
2018-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/87665
* tree-vect-data-refs.c (vect_preserves_scalar_order_p): Adjust
to reflect reality.
* gcc.dg/torture/pr87665.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr87665.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87665
--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 24 06:53:57 2018
New Revision: 265453
URL: https://gcc.gnu.org/viewcvs?rev=265453&root=gcc&view=rev
Log:
2018-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/87665
* tree-vect-data-refs.c (vect_preserves_scalar_order_p): Adjust
to reflect reality.
* gcc.dg/torture/pr87665.c: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/pr87665.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-vect-data-refs.c
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Subject: [Bug tree-optimization/87665] [6/7 Regression] gcc HEAD (svn: 265340) breaks elements on resize
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87665
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.2.1, 9.0
Summary|[6/7/8/9 Regression] gcc |[6/7 Regression] gcc HEAD
|HEAD (svn: 265340) breaks |(svn: 265340) breaks
|elements on resize |elements on resize
Known to fail|9.0 |
--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk and GCC 8 branch for now.
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Subject: [Bug tree-optimization/87665] [6/7 Regression] gcc HEAD (svn: 265340) breaks elements on resize
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|needs-bisection |
Priority|P3 |P2
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Subject: [Bug rtl-optimization/87708] [9 Regression] ira-shrinkwrap-prep-[12].c testcases fail after r265398
Date: Wed, 24 Oct 2018 07:07:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-10-24
Version|unknown |9.0
Target Milestone|--- |9.0
Summary|ira-shrinkwrap-prep-[12].c |[9 Regression]
|testcases fail after |ira-shrinkwrap-prep-[12].c
|r265398 |testcases fail after
| |r265398
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug regression/87720] New: [MIPS] ICE: gcc.c-torture/execute/builtins/lib/chk.c:33:1: in int_mode_for_mode, at stor-layout.c:403 after r265398
Date: Wed, 24 Oct 2018 07:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87720
Bug ID: 87720
Summary: [MIPS] ICE:
gcc.c-torture/execute/builtins/lib/chk.c:33:1: in
int_mode_for_mode, at stor-layout.c:403 after r265398
Product: gcc
Version: unknown
Status: UNCONFIRMED
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Priority: P3
Component: regression
Assignee: unassigned at gcc dot gnu.org
Reporter: paul.hua.gm at gmail dot com
Target Milestone: ---
Created attachment 44885
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44885&action=edit
preprocessed .i file
/home/xuchenghua/GCC/test/gcc-r265420_obj/gcc/cc1 -fpreprocessed
memcpy-chk-lib.i -mel -quiet -dumpbase memcpy-chk-lib.c -march=mips64r2
-mabi=64 -mllsc -mips64r2 -mno-shared -auxbase memcpy-chk-lib -O1 -w -version
-fdiagnostics-color=never -fno-diagnostics-show-caret
-fno-diagnostics-show-line-numbers -fno-tree-loop-distribute-patterns
-fno-tracer -o memcpy-chk-lib.s
GNU C17 (gcc trunk r265420 with mips64r2 n64) version 9.0.0 20181023
(experimental) (mips64el-linux-gnu)
compiled by GNU C
version 9.0.0 20181023 (experimental), GMP version 6.1.2, MPFR version 3.1.5,
MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C17 (gcc trunk r265420 with
mips64r2 n64) version 9.0.0 20181023 (experimental) (mips64el-linux-gnu)
compiled by GNU C version 9.0.0 20181023 (experimental), GMP
version 6.1.2, MPFR version 3.1.5, MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 7ce7412cdce432471eecf7d33f867911
during RTL pass: combine
In file included from
/home/xuchenghua/GCC/gcc_git_trunk/gcc/testsuite/gcc.c-torture/execute/builtins/memcpy-chk-lib.c:1:
/home/xuchenghua/GCC/gcc_git_trunk/gcc/testsuite/gcc.c-torture/execute/builtins/lib/chk.c:
In function ‘__chk_fail’:
/home/xuchenghua/GCC/gcc_git_trunk/gcc/testsuite/gcc.c-torture/execute/builtins/lib/chk.c:33:1:
internal compiler error: in int_mode_for_mode, at stor-layout.c:403
0x12089698f int_mode_for_mode(machine_mode)
../../../gcc_git_trunk/gcc/stor-layout.c:403
0x120462cff emit_move_via_integer
../../../gcc_git_trunk/gcc/expr.c:3361
0x120473a43 emit_move_insn_1(rtx_def*, rtx_def*)
../../../gcc_git_trunk/gcc/expr.c:3722
0x12047b50f gen_move_insn(rtx_def*, rtx_def*)
../../../gcc_git_trunk/gcc/expr.c:3810
0x12104b303 make_more_copies
../../../gcc_git_trunk/gcc/combine.c:14969
0x12104b303 rest_of_handle_combine
../../../gcc_git_trunk/gcc/combine.c:14984
0x12104b303 execute
../../../gcc_git_trunk/gcc/combine.c:15039
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-618626-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 07:24:02 2018
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Subject: [Bug lto/87698] [lto] Shared library build with -ffat-lto-objects generates extra global absolute symbol relocations
Date: Wed, 24 Oct 2018 07:24:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-10-24
CC| |hjl at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
The linker resolution fed to the WPA stage is the same.
The issue goes away when not using -g or when using gold as the linker.
HJ, this looks like a BFD linker issue to me - not sure where that
.dynsym for 'f' comes from. It looks like being a left-over from the
fat object part but it's weird that it only happens with -g (maybe
the fat debug somehow keeps it live). There is a .rela.text relocation
in test2.o (fat) to f. But a ABS dynsym is weird in any case.
>From gcc-bugs-return-618627-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 07:25:02 2018
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Subject: [Bug c++/87714] [8/9 Regression] ICE on valid C++ code: in type_dependent_expression_p, at cp/pt.c:25178
Date: Wed, 24 Oct 2018 07:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
>From gcc-bugs-return-618629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 07:27:50 2018
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Subject: [Bug rtl-optimization/87718] [9 Regression] FAIL: gcc.target/i386/avx512dq-concatv2si-1.c
Date: Wed, 24 Oct 2018 07:27:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization, ra
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-10-24
Target Milestone|--- |9.0
Ever confirmed|0 |1
>From gcc-bugs-return-618628-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 07:27:21 2018
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Subject: [Bug rtl-optimization/87717] [9 Regression] FAIL: gcc.target/i386/avx512vl-concatv2si-1.c scan-assembler vpunpckldq[^\n\r]*%xmm17[^\n\r]*%xmm16[^\n\r]*%xmm3
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |missed-optimization, ra
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Ever confirmed|0 |1
>From gcc-bugs-return-618630-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 07:29:32 2018
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Subject: [Bug regression/87720] [MIPS] ICE: gcc.c-torture/execute/builtins/lib/chk.c:33:1: in int_mode_for_mode, at stor-layout.c:403 after r265398
Date: Wed, 24 Oct 2018 07:29:00 -0000
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Paul Hua <paul.hua.gm at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |mips
--- Comment #1 from Paul Hua <paul.hua.gm at gmail dot com> ---
This can be reproduced by cross-compiler.
configure with:
../configure --target=mips64el-linux-gnu --enable-languages=c,c++
and simple test case:
$ cat longjmp.i
# 1 "longjmp.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 31 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 32 "<command-line>" 2
# 1 "longjmp.c"
# 16 "longjmp.c"
typedef void *jmp_buf;
jmp_buf buf;
void do_jump(void) {
__builtin_longjmp(buf, 1);
}
void f(void);
void do_setjmp(void) {
if (!__builtin_setjmp(buf))
f();
}
gcc/cc1 -fpreprocessed longjmp.i -mel -quiet -dumpbase longjmp.c
-march=mips64r2 -mllsc -mno-madd4 -mips64r2 -mabi=64 -auxbase-strip longjmp.o
-O2 -version -o longjmp.s
during RTL pass: combine
longjmp.c: In function ‘do_jump’:
longjmp.c:27:1: internal compiler error: in int_mode_for_mode, at
stor-layout.c:403
27 | }
| ^
0x12089698f int_mode_for_mode(machine_mode)
../../../gcc_git_trunk/gcc/stor-layout.c:403
0x120462cff emit_move_via_integer
../../../gcc_git_trunk/gcc/expr.c:3361
0x120473a43 emit_move_insn_1(rtx_def*, rtx_def*)
../../../gcc_git_trunk/gcc/expr.c:3722
0x12047b50f gen_move_insn(rtx_def*, rtx_def*)
../../../gcc_git_trunk/gcc/expr.c:3810
0x12104b303 make_more_copies
../../../gcc_git_trunk/gcc/combine.c:14969
0x12104b303 rest_of_handle_combine
../../../gcc_git_trunk/gcc/combine.c:14984
0x12104b303 execute
../../../gcc_git_trunk/gcc/combine.c:15039
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-618632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 07:42:54 2018
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Subject: [Bug c++/87269] [9 Regression] ICE in tsubst_copy, at cp/pt.c:15475 starting from r261802
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |larsbj at gullik dot net
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 87463 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-618631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 07:42:49 2018
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Subject: [Bug c++/87463] [9 Regression] ICE in in tsubst_copy, at cp/pt.c:15513
Date: Wed, 24 Oct 2018 07:42:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
I guess it's dup.
*** This bug has been marked as a duplicate of bug 87269 ***
>From gcc-bugs-return-618633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 07:53:16 2018
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Subject: [Bug tree-optimization/84013] wrong __restrict clique with inline asm operand
Date: Wed, 24 Oct 2018 07:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84013
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 44886
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44886&action=edit
patch I am testing
Patch I am testing - sorry for the delay.
>From gcc-bugs-return-618634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 08:36:33 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87721] New: [9 Regression] ICE in linemap_position_for_line_and_column at gcc/libcpp/line-map.c:842 since r265271
Date: Wed, 24 Oct 2018 08:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87721
Bug ID: 87721
Summary: [9 Regression] ICE in
linemap_position_for_line_and_column at
gcc/libcpp/line-map.c:842 since r265271
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: dmalcolm at gcc dot gnu.org
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Hi.
This is follow up of PR87562 which was introduced by commit that fixed the
issue.
Unfortunately I can't reproduce that with -E -C so that one needs to do
following:
$ wget https://github.com/aqbanking/gwenhywfar/archive/4.20.1.tar.gz
$ tar xvzf 4.20.1.tar.gz
$ cd gwenhywfar-4.20.1
$ autoreconf -ifv && ./configure --with-guis && make -j8
...
make[4]: Entering directory
'/home/marxin/BIG/osc/home:marxin:gcc9-incubator-v1/gwenhywfar/gwenhywfar-4.20.1/src/base'
/bin/sh ../../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H
-DGWEN_BUFFER_DEFAULT_HARDLIMIT='(16*1024*1024)' -I. -I../..
-I../../gwenhywfar4 -I../../src/ -I../../src/base -I../../src/gui
-I../../src/io -I../../src/ipc -I../../src/parser -fvisibility=hidden
-DBUILDING_GWENHYWFAR -g -O2 -Wall -Wall -MT plugin.lo -MD -MP -MF
.deps/plugin.Tpo -c -o plugin.lo plugin.c
libtool: compile: gcc -DHAVE_CONFIG_H
"-DGWEN_BUFFER_DEFAULT_HARDLIMIT=(16*1024*1024)" -I. -I../..
-I../../gwenhywfar4 -I../../src/ -I../../src/base -I../../src/gui
-I../../src/io -I../../src/ipc -I../../src/parser -fvisibility=hidden
-DBUILDING_GWENHYWFAR -g -O2 -Wall -Wall -MT plugin.lo -MD -MP -MF
.deps/plugin.Tpo -c plugin.c -fPIC -DPIC -o .libs/plugin.o
during GIMPLE pass: printf-return-value
plugin.c: In function ‘GWEN_PluginManager_LoadPlugin’:
plugin.c:340:14: internal compiler error: Segmentation fault
340 | GWEN_PLUGIN *GWEN_PluginManager_LoadPlugin(GWEN_PLUGIN_MANAGER *pm,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0x11884b4 crash_signal
/home/marxin/Programming/gcc/gcc/toplev.c:325
0x7ffff6bc310f ???
/usr/src/debug/glibc-2.27-6.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x1fa1640 linemap_position_for_line_and_column(line_maps*, line_map_ordinary
const*, unsigned int, unsigned int)
/home/marxin/Programming/gcc/libcpp/line-map.c:842
0x1f7c786 get_substring_ranges_for_loc
/home/marxin/Programming/gcc/gcc/input.c:1472
0x1f7c903 get_source_location_for_substring(cpp_reader*, string_concat_db*,
unsigned int, cpp_ttype, int, int, int, unsigned int*)
/home/marxin/Programming/gcc/gcc/input.c:1525
0x972881 c_get_substring_location(substring_loc const&, unsigned int*)
/home/marxin/Programming/gcc/gcc/c-family/c-common.c:865
0x117dbdf substring_loc::get_location(unsigned int*) const
/home/marxin/Programming/gcc/gcc/substring-locations.c:284
0x117d70b format_string_diagnostic_t::emit_warning_n_va(int, unsigned long,
char const*, char const*, __va_list_tag (*) [1]) const
/home/marxin/Programming/gcc/gcc/substring-locations.c:156
0x117da15 format_string_diagnostic_t::emit_warning_va(int, char const*,
__va_list_tag (*) [1]) const
/home/marxin/Programming/gcc/gcc/substring-locations.c:241
0x1d98d83 fmtwarn
/home/marxin/Programming/gcc/gcc/gimple-ssa-sprintf.c:472
0x1d9ddfc maybe_warn
/home/marxin/Programming/gcc/gcc/gimple-ssa-sprintf.c:2529
0x1d9eab3 format_directive
/home/marxin/Programming/gcc/gcc/gimple-ssa-sprintf.c:2817
0x1da0735 compute_format_length
/home/marxin/Programming/gcc/gcc/gimple-ssa-sprintf.c:3497
0x1da188a handle_gimple_call
/home/marxin/Programming/gcc/gcc/gimple-ssa-sprintf.c:3981
0x1da1a21 before_dom_children
/home/marxin/Programming/gcc/gcc/gimple-ssa-sprintf.c:4020
0x1d262e1 dom_walker::walk(basic_block_def*)
/home/marxin/Programming/gcc/gcc/domwalk.c:353
0x1da1ac3 execute
/home/marxin/Programming/gcc/gcc/gimple-ssa-sprintf.c:4046
Feel free to contact me with how to reproduce that.
>From gcc-bugs-return-618635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 08:56:07 2018
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Subject: [Bug ada/87715] problems with asan and -O3 build of ada
Date: Wed, 24 Oct 2018 08:56:00 -0000
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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> ---
Interesting, let me try to reproduce that. Note that using -O3 can't be problem
as it's supposed to do only valid code transformations.
>From gcc-bugs-return-618636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 09:01:14 2018
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Subject: [Bug c++/87721] [9 Regression] ICE in linemap_position_for_line_and_column at gcc/libcpp/line-map.c:842 since r265271
Date: Wed, 24 Oct 2018 08:57:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-10-24
Target Milestone|--- |9.0
Ever confirmed|0 |1
Known to fail| |9.0
>From gcc-bugs-return-618637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 09:05:22 2018
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Subject: [Bug tree-optimization/87105] Autovectorization [X86, SSE2, AVX2, DoublePrecision]
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
With the duplicate store issue fixed in the vectorizer we run into the SLP
vectorization issue that limits the growth of the SLP tree (yes, it's a tree
and thus tends to grow expontential easily...).
>From gcc-bugs-return-618639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 09:19:30 2018
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Subject: [Bug bootstrap/87722] go bootstrap is broken on armv7l target
Date: Wed, 24 Oct 2018 09:19:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-10-24
Target Milestone|--- |9.0
>From gcc-bugs-return-618638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 09:19:08 2018
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Subject: [Bug bootstrap/87722] New: go bootstrap is broken on armv7l target
Date: Wed, 24 Oct 2018 09:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87722
Bug ID: 87722
Summary: go bootstrap is broken on armv7l target
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
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I see following:
[ 6365s] checking for catanf... libtool: compile:
/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265378/obj-armv7hl-suse-linux-gnueabi/./gcc/gccgo
-B/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265378/obj-armv7hl-suse-linux-gnueabi/./gcc/
-B/usr/armv7hl-suse-linux-gnueabi/bin/ -B/usr/armv7hl-suse-linux-gnueabi/lib/
-isystem /usr/armv7hl-suse-linux-gnueabi/include -isystem
/usr/armv7hl-suse-linux-gnueabi/sys-include -O2 -g -I . -c
-fgo-pkgpath=math/cmplx ../../../libgo/go/math/cmplx/abs.go
../../../libgo/go/math/cmplx/asin.go ../../../libgo/go/math/cmplx/conj.go
../../../libgo/go/math/cmplx/exp.go ../../../libgo/go/math/cmplx/isinf.go
../../../libgo/go/math/cmplx/isnan.go ../../../libgo/go/math/cmplx/log.go
../../../libgo/go/math/cmplx/phase.go ../../../libgo/go/math/cmplx/polar.go
../../../libgo/go/math/cmplx/pow.go ../../../libgo/go/math/cmplx/rect.go
../../../libgo/go/math/cmplx/sin.go ../../../libgo/go/math/cmplx/sqrt.go
../../../libgo/go/math/cmplx/tan.go -fPIC -o math/.libs/cmplx.o
[ 6365s] libtool: compile:
/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265378/obj-armv7hl-suse-linux-gnueabi/./gcc/gccgo
-B/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265378/obj-armv7hl-suse-linux-gnueabi/./gcc/
-B/usr/armv7hl-suse-linux-gnueabi/bin/ -B/usr/armv7hl-suse-linux-gnueabi/lib/
-isystem /usr/armv7hl-suse-linux-gnueabi/include -isystem
/usr/armv7hl-suse-linux-gnueabi/sys-include -O2 -g -I . -c
-fgo-pkgpath=internal/testlog ../../../libgo/go/internal/testlog/log.go -o
internal/testlog.o >/dev/null 2>&1
[ 6365s] runtime_sysinfo.go:1672:7: error: redefinition of '_HWCAP_IDIVA'
[ 6365s] 1672 | const _HWCAP_IDIVA = (1 << 17)
[ 6365s] | ^
[ 6365s] ../../../libgo/go/runtime/os_linux_arm.go:14:2: note: previous
definition of '_HWCAP_IDIVA' was here
[ 6365s] 14 | _HWCAP_IDIVA = 1 << 17
[ 6365s] | ^
[ 6365s] runtime_sysinfo.go:3152:7: error: redefinition of '_HWCAP_VFPv3'
[ 6365s] 3152 | const _HWCAP_VFPv3 = (1 << 13)
[ 6365s] | ^
[ 6365s] ../../../libgo/go/runtime/os_linux_arm.go:13:2: note: previous
definition of '_HWCAP_VFPv3' was here
[ 6365s] 13 | _HWCAP_VFPv3 = 1 << 13 // introduced in 2.6.30
[ 6365s] | ^
[ 6365s] runtime_sysinfo.go:5579:7: error: redefinition of '_HWCAP_VFP'
[ 6365s] 5579 | const _HWCAP_VFP = (1 << 6)
[ 6365s] | ^
[ 6365s] ../../../libgo/go/runtime/os_linux_arm.go:12:2: note: previous
definition of '_HWCAP_VFP' was here
[ 6365s] 12 | _HWCAP_VFP = 1 << 6 // introduced in at least 2.6.11
[ 6365s] | ^
Any idea what can be wrong?
>From gcc-bugs-return-618640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 09:20:23 2018
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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/87723] New: ICE: output_operand: invalid %-code on s390x
Date: Wed, 24 Oct 2018 09:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87723
Bug ID: 87723
Summary: ICE: output_operand: invalid %-code on s390x
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-pc-linux-gnu, s390x-linux-gnu
Target: s390x-linux-gnu
Seen both on native and cross-compiler:
$ cat ice.i
unsigned long a;
int b;
void c(char* i) {
for (;;) {
char g = 0;
for (; g < 24; ++g)
b = a << g | a >> 64 - g;
{
char *d = i;
long h = b;
char e = 0;
for (; e < 8; ++e)
d[e] = h;
}
char *d = i;
signed e;
unsigned long f = 0;
e = 7;
for (; e; --e) {
f <<= 8;
f |= d[e];
}
for (; e < 8; ++e)
d[e] = f;
}
}
$ /home/marxin/Programming/gcc2/objdir2/gcc/xgcc
-B/home/marxin/Programming/gcc2/objdir2/gcc/ -O3 -S -march=z196 -m64 -mzarch
ice.i
during RTL pass: final
ice.i: In function ‘c’:
ice.i:26:1: internal compiler error: output_operand: invalid %-code
26 | }
| ^
0x9bf140 output_operand_lossage(char const*, ...)
../../gcc/final.c:3600
0x9bfd68 output_asm_insn(char const*, rtx_def**)
../../gcc/final.c:3969
0x9c10a1 final_scan_insn_1
../../gcc/final.c:3103
0x9c14db final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
../../gcc/final.c:3149
0x9c17d6 final_1
../../gcc/final.c:2019
0x9c28e8 rest_of_handle_final
../../gcc/final.c:4649
0x9c28e8 execute
../../gcc/final.c:4723
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Subject: [Bug target/87723] ICE: output_operand: invalid %-code on s390x
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87723
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-10-24
CC| |krebbel at gcc dot gnu.org,
| |uweigand at gcc dot gnu.org
Target Milestone|--- |9.0
>From gcc-bugs-return-618642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 09:32:39 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87724] New: gcc allows narrowing conversions in converted constant expressions
Date: Wed, 24 Oct 2018 09:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87724
Bug ID: 87724
Summary: gcc allows narrowing conversions in converted constant
expressions
Product: gcc
Version: 9.0
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Priority: P3
Component: c++
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Compiled with -std=c++17 (https://godbolt.org/z/fO32Pd)
int main() {
static_assert(2); // ill-formed, gcc accepts
if constexpr (2); // ill-formed, gcc accepts
}
2 doesn't fit in a bool, and as such it is a narrowing conversion and fails to
be a "contextually converted constant expression of type bool" as per
[expr.const]p5.
>From gcc-bugs-return-618643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 09:36:07 2018
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Subject: [Bug ada/87715] problems with asan and -O3 build of ada
Date: Wed, 24 Oct 2018 09:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87715
--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Martin Liška from comment #1)
> Interesting, let me try to reproduce that. Note that using -O3 can't be
> problem as it's supposed to do only valid code transformations.
Indeed. O3 isn't the problem. Only -O2 and ada required. Here is a stack
backtrace for more detail.
==27827==ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address
0x7fffabf0ac47 at pc 0x000001b9656c bp 0x7fffabf0a530 sp 0x7fffabf0a528
READ of size 1 at 0x7fffabf0ac47 thread T0
#0 0x1b9656b in switch__c__scan_front_end_switches
../../trunk/gcc/ada/switch-c.adb:302
#1 0x1bd3446 in back_end__scan_compiler_arguments
../../trunk/gcc/ada/back_end.adb:387
#2 0x1bd3da4 in _ada_gnat1drv ../../trunk/gcc/ada/gnat1drv.adb:1049
#3 0x13e572d in gnat_parse_file
../../trunk/gcc/ada/gcc-interface/misc.c:119
Line 302 is
C := Switch_Chars (Ptr);
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Subject: [Bug tree-optimization/84013] wrong __restrict clique with inline asm operand
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |9.0
Resolution|--- |FIXED
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-618645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 09:43:01 2018
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Subject: [Bug tree-optimization/84013] wrong __restrict clique with inline asm operand
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 24 09:42:19 2018
New Revision: 265455
URL: https://gcc.gnu.org/viewcvs?rev=265455&root=gcc&view=rev
Log:
2018-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/84013
* tree-ssa-structalias.c (struct msdi_data): New struct for
marshalling data to walk_stmt_load_store_ops.
(maybe_set_dependence_info): Refactor as callback for
walk_stmt_load_store_ops.
(compute_dependence_clique): Set restrict info on all stmt kinds.
* gcc.dg/tree-ssa/restrict-9.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/restrict-9.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-structalias.c
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>From gcc-bugs-return-618647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 09:50:17 2018
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From: "as at cmplx dot uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/87725] New: OpenMP 4.5 clause schedule(simd,monotonic:static) not understood
Date: Wed, 24 Oct 2018 09:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87725
Bug ID: 87725
Summary: OpenMP 4.5 clause schedule(simd,monotonic:static) not
understood
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgomp
Assignee: unassigned at gcc dot gnu.org
Reporter: as at cmplx dot uk
CC: jakub at gcc dot gnu.org
Target Milestone: ---
OpenMP 4.5 specifications say that
schedule clause can have 2 modifiers,
specifically this should be valid:
!$omp do schedule(simd,monotonic:static)
But gfortran9 rejects this with:
21 | !$omp do schedule(simd,monotonic:static, n/nthr )
| 1
Error: Unclassifiable OpenMP directive at (1)
Intel Fortran 18 does accept the above
construct with 2 schedule modifiers.
Using only a single modifier is accepted by gfortran9, i.e:
!$omp do schedule( simd:static )
!$omp do schedule( monotonic:static )
are both fine.
I guess this just hasn't been implemented yet?
A complete program:
use, intrinsic :: iso_fortran_env
use :: omp_lib
implicit none
integer :: i, val, tid, nthr, sum, part, n
write (*,*) "OMP version:", openmp_version
n = 2**30
sum = 0
!$omp parallel default( none ) &
!$omp private( tid, i, part, nthr ) &
!$omp shared( sum, n )
part = 0
nthr = omp_get_num_threads()
tid = omp_get_thread_num()
write (*,*) tid, nthr
! !$omp do schedule(simd,monotonic:static, n/nthr )
!$omp do schedule(simd:static, n/nthr )
! !$omp do schedule(monotonic:static, n/nthr )
do i=1,n
part = part + 1
end do
!$omp end do nowait
!$omp atomic
sum = sum + part
!$omp end atomic
!$omp end parallel
write (*,*) sum, ( sum .eq. n )
end
>From gcc-bugs-return-618648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 09:52:09 2018
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From: "mihail.zenkov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87702] [6/7/8/9 Regression] Segfault in glibc if compiled with -march=amdfam10 -O2 (x86)
Date: Wed, 24 Oct 2018 09:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87702
--- Comment #7 from Mihail Zenkov <mihail.zenkov at gmail dot com> ---
http://www.knk.uwebweb.com/glibc-segfault-2.tar.xz
I put full command line into exit.cmd and vfscanf.cmd.
>From gcc-bugs-return-618649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 10:53:45 2018
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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++/87724] gcc allows narrowing conversions in converted constant expressions
Date: Wed, 24 Oct 2018 10:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87724
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |SUSPENDED
Last reconfirmed| |2018-10-24
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
CWG has been discussing this and the consensus seems to be that both examples
are OK. We certainly shouldn't make any change to GCC until CWG makes a final
decision.
>From gcc-bugs-return-618650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 10:54:28 2018
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87726] New: -fdebug-prefix-map doesn't work with lto
Date: Wed, 24 Oct 2018 10:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87726
Bug ID: 87726
Summary: -fdebug-prefix-map doesn't work with lto
Product: gcc
Version: lto
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ville.voutilainen at gmail dot com
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Created attachment 44887
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44887&action=edit
Test application
With the attached source, uncommenting the lto flags at the top of the Makefile
lead to a linker error when making the source. The source needs the development
headers and libs for dwarf and dw.
This problem breaks the attempts to build boot2qt with lto enabled with yocto.
>From gcc-bugs-return-618651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 11:27:10 2018
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Subject: [Bug tree-optimization/15089] local register variable with a specified register is bad
Date: Wed, 24 Oct 2018 11:27:00 -0000
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Ilya Lesokhin <ilya.lesokhin at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ilya.lesokhin at gmail dot com
--- Comment #26 from Ilya Lesokhin <ilya.lesokhin at gmail dot com> ---
Created attachment 44888
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44888&action=edit
Test case demonstrating the problem
Looks like issue still exists.
#include <array>
uint64_t test() {
register uint64_t t0;
register uint64_t t1;
register uint64_t t2 ;
register uint64_t rdx;
register uint64_t r0 asm("rsi");
register uint64_t r1 ;
register uint64_t r2 ;
register uint64_t r3 ;
register uint64_t m3;
register uint64_t y0;
register uint64_t y1;
register uint64_t y2;
register uint64_t y3;
asm(
"mov %[res0],%[res0]"
: "=&d"(rdx), [res0] "=&r"(r0), [res1] "=&r"(r1), [res2] "=&r"(r2),
[res3] "=&r"(r3),
[t0] "=&r"(t0), [t1] "=&r"(t1), [t2] "=&r"(t2)
: [m3] "r"(m3), [y0] "r"(y0), [y1] "r"(y1), [y2] "r"(y2)
: "cc");
return r0;
}
Results in:
test():
push %r14
xor %eax,%eax
xor %ecx,%ecx
push %rbp
xor %esi,%esi
xor %edi,%edi
push %rbx
mov %r14,%r14 <--------- should be rsi.
mov %r14,%rax
pop %rbx
pop %rbp
pop %r14
retq
https://godbolt.org/z/RLTDbY
>From gcc-bugs-return-618652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 11:47:42 2018
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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/87105] Autovectorization [X86, SSE2, AVX2, DoublePrecision]
Date: Wed, 24 Oct 2018 11:47:00 -0000
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 24 11:46:58 2018
New Revision: 265457
URL: https://gcc.gnu.org/viewcvs?rev=265457&root=gcc&view=rev
Log:
2018-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/87105
* tree-vect-data-refs.c (vect_analyze_group_access_1): Adjust
dump classification.
(vect_analyze_data_ref_accesses): Handle duplicate loads and
stores by splitting the affected group after the fact.
* tree-vect-slp.c (vect_build_slp_tree_2): Dump when we
fail the SLP build because of size constraints.
* gcc.dg/vect/bb-slp-39.c: New testcase.
* gfortran.dg/vect/pr83232.f90: Un-XFAIL.
Added:
trunk/gcc/testsuite/gcc.dg/vect/bb-slp-39.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/vect/pr83232.f90
trunk/gcc/tree-vect-data-refs.c
trunk/gcc/tree-vect-slp.c
>From gcc-bugs-return-618653-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 12:01:51 2018
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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/84629] sanitizer warnings and errors on Linux
Date: Wed, 24 Oct 2018 12:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84629
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
I'm curious about:
/home/marxin/Programming/gcc/libsanitizer/sanitizer_common/sanitizer_linux.cc:
In function ‘void* __sanitizer::internal_start_thread(void (*)(void*), void*)’:
/home/marxin/Programming/gcc/libsanitizer/sanitizer_common/sanitizer_linux.cc:1733:58:
warning: cast between incompatible function types from ‘void (*)(void*)’ to
‘void* (*)(void*)’ [-Wcast-function-type]
1733 | real_pthread_create(&th, nullptr, (void*(*)(void *arg))func, arg);
| ^~~~
Shouldn't something like:
diff --git a/libsanitizer/sanitizer_common/sanitizer_linux.cc
b/libsanitizer/sanitizer_common/sanitizer_linux.cc
index f1f70ec57fc..7571ff9b25d 100644
--- a/libsanitizer/sanitizer_common/sanitizer_linux.cc
+++ b/libsanitizer/sanitizer_common/sanitizer_linux.cc
@@ -1719,7 +1719,7 @@ HandleSignalMode GetHandleSignalMode(int signum) {
}
#if !SANITIZER_GO
-void *internal_start_thread(void(*func)(void *arg), void *arg) {
+void *internal_start_thread(void*(*func)(void *arg), void *arg) {
// Start the thread with signals blocked, otherwise it can steal user
signals.
__sanitizer_sigset_t set, old;
internal_sigfillset(&set);
@@ -1730,7 +1730,7 @@ void *internal_start_thread(void(*func)(void *arg), void
*arg) {
#endif
internal_sigprocmask(SIG_SETMASK, &set, &old);
void *th;
- real_pthread_create(&th, nullptr, (void*(*)(void *arg))func, arg);
+ real_pthread_create(&th, nullptr, func, arg);
internal_sigprocmask(SIG_SETMASK, &old, nullptr);
return th;
}
@@ -1739,7 +1739,7 @@ void internal_join_thread(void *th) {
real_pthread_join(th, nullptr);
}
#else
-void *internal_start_thread(void (*func)(void *), void *arg) { return 0; }
+void *internal_start_thread(void *(*func)(void *), void *arg) { return 0; }
void internal_join_thread(void *th) {}
#endif
by applied to libsanitizer mainline?
>From gcc-bugs-return-618654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 12:08:48 2018
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Subject: [Bug rtl-optimization/87720] [9 Regression] [MIPS] ICE: gcc.c-torture/execute/builtins/lib/chk.c:33:1: in int_mode_for_mode, at stor-layout.c:403 after r265398
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
Component|regression |rtl-optimization
Version|unknown |9.0
Target Milestone|--- |9.0
Summary|[MIPS] ICE: |[9 Regression] [MIPS] ICE:
|gcc.c-torture/execute/built |gcc.c-torture/execute/built
|ins/lib/chk.c:33:1: in |ins/lib/chk.c:33:1: in
|int_mode_for_mode, at |int_mode_for_mode, at
|stor-layout.c:403 after |stor-layout.c:403 after
|r265398 |r265398
>From gcc-bugs-return-618655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 12:33:25 2018
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Subject: [Bug rtl-optimization/87727] New: [9 regression] gcc.target/sparc/overflow-2.c FAILs
Date: Wed, 24 Oct 2018 12:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87727
Bug ID: 87727
Summary: [9 regression] gcc.target/sparc/overflow-2.c FAILs
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: ebotcazou at gcc dot gnu.org
Target Milestone: ---
Target: sparc-sun-solaris2.*
Between 20181022 (r265393) and 20181023 (r265430),
gcc.target/sparc/overflow-2.c
started to FAIL:
+FAIL: gcc.target/sparc/overflow-2.c scan-assembler-not save\\t%
I'm attaching old and current assembler output.
>From gcc-bugs-return-618656-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 12:33:40 2018
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Subject: [Bug rtl-optimization/87727] [9 regression] gcc.target/sparc/overflow-2.c FAILs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87727
Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
>From gcc-bugs-return-618657-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 12:34:36 2018
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87728] New: inline asm not optimized on GIMPLE
Date: Wed, 24 Oct 2018 12:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87728
Bug ID: 87728
Summary: inline asm not optimized on GIMPLE
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
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Target Milestone: ---
PR 63900 points out a case where RTL CSE fails to clean up redundant loads in
presence of BLKmode accesses, but there really isn't anything in that testcase
that GCC shouldn't be able to clean up in GIMPLE. It seems GIMPLE optimizations
are too conservative with regards to asm statements.
For the simple testcase
int f()
{
int a=0, b;
asm("# %0 %1" : "=m"(b) : "m"(a));
return a;
}
the asm is dead and this should become 'return 0;', but in .optimized dump we
still have
f ()
{
int b;
int a;
int _4;
<bb 2> :
a = 0;
__asm__("# %0 %1" : "=m" b : "m" a);
_4 = a;
a ={v} {CLOBBER};
b ={v} {CLOBBER};
return _4;
}
>From gcc-bugs-return-618658-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 12:34:47 2018
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Subject: [Bug rtl-optimization/87727] [9 regression] gcc.target/sparc/overflow-2.c FAILs
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--- Comment #1 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 44889
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44889&action=edit
previous overflow-2.s
>From gcc-bugs-return-618659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 12:35:33 2018
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Subject: [Bug rtl-optimization/87727] [9 regression] gcc.target/sparc/overflow-2.c FAILs
Date: Wed, 24 Oct 2018 12:35:00 -0000
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--- Comment #2 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 44890
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44890&action=edit
current overflow-2.s
>From gcc-bugs-return-618660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 12:36:08 2018
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug inline-asm/63900] memory constrains needlessly doing memory clobber
Date: Wed, 24 Oct 2018 12:36:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #10 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
No, as mentioned in comment 3 there aren't any "full memory clobbers" anywhere,
the title of the bug is inaccurate. The original testcase shows that under
specific circumstances RTL optimizations fail to clean up redundant loads; your
testcase does not reproduce those circumstances.
FWIW it's a technically missed-optimization for GIMPLE passes as well, GCC
could have cleaned this up without relying on RTL passes: PR 87728.
>From gcc-bugs-return-618661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 12:42:37 2018
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Subject: [Bug rtl-optimization/87720] [9 Regression] [MIPS] ICE: gcc.c-torture/execute/builtins/lib/chk.c:33:1: in int_mode_for_mode, at stor-layout.c:403 after r265398
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--- Comment #2 from Paul Hua <paul.hua.gm at gmail dot com> ---
untested patch:
Index: gcc/combine.c
===================================================================
--- gcc/combine.c (revision 265456)
+++ gcc/combine.c (working copy)
@@ -14965,7 +14965,11 @@
if (TEST_HARD_REG_BIT (fixed_reg_set, REGNO (src)))
continue;
- rtx new_reg = gen_reg_rtx (GET_MODE (dest));
+ rtx new_reg;
+ if (GET_CODE(dest) == PC)
+ new_reg = gen_reg_rtx (GET_MODE (src));
+ else
+ new_reg = gen_reg_rtx (GET_MODE (dest));
rtx_insn *insn1 = gen_move_insn (new_reg, src);
rtx_insn *insn2 = gen_move_insn (dest, new_reg);
emit_insn_after (insn1, insn);
Index: gcc/expr.c
===================================================================
--- gcc/expr.c (revision 265456)
+++ gcc/expr.c (working copy)
@@ -3684,7 +3684,12 @@
rtx_insn *
emit_move_insn_1 (rtx x, rtx y)
{
- machine_mode mode = GET_MODE (x);
+ machine_mode mode;
+ if (GET_CODE (x) == PC)
+ mode = GET_MODE (y);
+ else /* Include (GET_CODE (y) = PC) */
+ mode = GET_MODE (x);
+
enum insn_code code;
gcc_assert ((unsigned int) mode < (unsigned int) MAX_MACHINE_MODE);
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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++/86288] Recognize __gnu and/or __gnu__ as attribute-namespace
Date: Wed, 24 Oct 2018 12:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86288
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Clang has now implemented this as a special case, only recognizing "__gnu__" as
a synonym for the "gnu" attribute-namespace. That's fine for libstdc++'s
purposes, as I don't expect we'll start using any other vendor attributes.
EDG have also been told about this, so compilers based on their front end
should also be able to recognize [[__gnu__::__blah__]] at some point.
>From gcc-bugs-return-618663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 12:54:29 2018
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Subject: [Bug go/87722] [9 Regression] go bootstrap is broken on armv7l target
Date: Wed, 24 Oct 2018 12:54:00 -0000
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Ian Lance Taylor <ian at airs dot com> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Ian Lance Taylor <ian at airs dot com> ---
Dup of 87661, which should have been fixed by revision 265439.
*** This bug has been marked as a duplicate of bug 87661 ***
>From gcc-bugs-return-618664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 12:54:30 2018
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Subject: [Bug go/87661] [9 Regression] libgo bootstrap failure on arm-linux-gnueabihf (redefinition of constants)
Date: Wed, 24 Oct 2018 12:54:00 -0000
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CC| |marxin at gcc dot gnu.org
--- Comment #3 from Ian Lance Taylor <ian at airs dot com> ---
*** Bug 87722 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-618665-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 13:01:22 2018
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Subject: [Bug c++/87729] New: Please include -Woverloaded-virtual in -Wall
Date: Wed, 24 Oct 2018 13:01:00 -0000
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Bug ID: 87729
Summary: Please include -Woverloaded-virtual in -Wall
Product: gcc
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clang includes -Woverloaded-virtual in -Wall. Please do same for gcc.
>From gcc-bugs-return-618666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 13:08:12 2018
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Subject: [Bug preprocessor/87730] New: Warn about misuses of __has_include_next
Date: Wed, 24 Oct 2018 13:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87730
Bug ID: 87730
Summary: Warn about misuses of __has_include_next
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: enhancement
Priority: P3
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Blocks: 87403
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Clang has some nice warnings for dubious uses of __has_include_next.
Given:
#if __has_include_next(</usr/include/stdio.h>)
#endif
In the main file being compiled this produces:
foo.cc:1:5: warning: #include_next in primary source file
[-Winclude-next-outside-header]
#if __has_include_next(</usr/include/stdio.h>)
^
and in an included header it produces:
In file included from foo.cc:1:
./foo.h:1:5: warning: #include_next with absolute path
[-Winclude-next-absolute-path]
#if __has_include_next(</usr/include/stdio.h>)
^
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
[Bug 87403] [Meta-bug] Issues that suggest a new warning
>From gcc-bugs-return-618667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 13:10:03 2018
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Subject: [Bug preprocessor/80753] __has_include and __has_include_next taints subsequent I/O errors
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2018-10-24
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>From gcc-bugs-return-618668-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 13:11:31 2018
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Subject: [Bug preprocessor/80753] __has_include and __has_include_next taints subsequent I/O errors
Date: Wed, 24 Oct 2018 13:11:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This means the following paradox compiles OK:
#if ! __has_include(<nonesuch>)
# include <nonesuch>
#endif
>From gcc-bugs-return-618669-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 13:14:08 2018
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Subject: [Bug c++/87731] New: Detection of mismatched alloc/free pairs
Date: Wed, 24 Oct 2018 13:14:00 -0000
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Bug ID: 87731
Summary: Detection of mismatched alloc/free pairs
Product: gcc
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Following code compiles cleanly on gcc:
void foo()
{
char* c = new char[4];
delete c;
}
When it is compiles using clang 7.0.0, it generates following warning. Please
do the same in gcc.
<source>:4:5: warning: 'delete' applied to a pointer that was allocated with
'new[]'; did you mean 'delete[]'? [-Wmismatched-new-delete]
delete c;
^
[]
<source>:3:15: note: allocated with 'new[]' here
char* c = new char[4];
^
1 warning generated.
Compiler returned: 0
Valgrind also has similar diagnostics, it checks checks following pairs by
default: malloc/free, new/delete, new[]/delete[]. Please implement something
similar in gcc.
Valgrind also provides set of macros which allows it to track custom alloc/free
functions. It would be nice if you add new attributes which could be attached
to custom alloc and free functions, so gcc could check pairing for them too. I
think of something like this:
__attribute__((malloc("MyAllocType")))
void* MyAlloc(size_t);
__attribute__((free("MyAllocType")))
void MyFree(void*);
>From gcc-bugs-return-618670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 13:18:50 2018
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Subject: [Bug c++/87732] New: Detect and eliminate unnecessary alloc/free pairs
Date: Wed, 24 Oct 2018 13:18:00 -0000
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Bug ID: 87732
Summary: Detect and eliminate unnecessary alloc/free pairs
Product: gcc
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[code]
void foo()
{
char* c = new char[4];
delete[] c;
}
[/code]
gcc with -O3 generates this:
[asm]
foo():
sub rsp, 8
mov edi, 4
call operator new[](unsigned long)
add rsp, 8
mov rdi, rax
jmp operator delete[](void*)
[/asm]
clang 7.0.0 is able to remove unnecessary alloc/free pair:
[asm]
foo(): # @foo()
ret
[/asm]
Please do similar thing in gcc too.
>From gcc-bugs-return-618671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 13:20:33 2018
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Subject: [Bug c++/87732] Detect and eliminate unnecessary alloc/free pairs
Date: Wed, 24 Oct 2018 13:20:00 -0000
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--- Comment #1 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
New warning for this also would be welcome.
>From gcc-bugs-return-618672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 13:22:30 2018
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Subject: [Bug inline-asm/87733] New: local register variable not honored with earlyclobber
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Bug ID: 87733
Summary: local register variable not honored with earlyclobber
Product: gcc
Version: 9.0
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GCC fails to allocate %rsi for the first operand of the asm at -O2:
int test()
{
register int r0 asm("rsi");
asm("# %0 %1" : "=&r"(r0) : "r"(0));
return r0;
}
test:
.cfi_startproc
xorl %esi, %esi
#APP
# %eax %esi
#NO_APP
ret
>From gcc-bugs-return-618673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 13:26:24 2018
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Subject: [Bug tree-optimization/15089] local register variable with a specified register is bad
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
Known to fail|tree-ssa |
--- Comment #27 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
No, this is a different issue (local reg var not honored for an earlyclobber
operand), and it's better to have a separate bug: PR 87733.
>From gcc-bugs-return-618674-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 13:29:02 2018
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Subject: [Bug c++/87732] Detect and eliminate unnecessary new/delete pairs
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Detect and eliminate |Detect and eliminate
|unnecessary alloc/free |unnecessary new/delete
|pairs |pairs
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
We can do this for malloc/free but not for new/delete. DCE does this.
>From gcc-bugs-return-618675-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 13:32:05 2018
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Subject: [Bug tree-optimization/87728] inline asm not optimized on GIMPLE
Date: Wed, 24 Oct 2018 13:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |alias
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-10-24
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Primary cause:
/* If the statement STMT may clobber the memory reference REF return true,
otherwise return false. */
bool
stmt_may_clobber_ref_p_1 (gimple *stmt, ao_ref *ref, bool tbaa_p)
{
...
else if (gimple_code (stmt) == GIMPLE_ASM)
return true;
similarly ref_maybe_used_by_stmt_p ().
Not sure if really worth the trouble though.
>From gcc-bugs-return-618676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 13:46:32 2018
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Subject: [Bug rtl-optimization/87727] [9 regression] gcc.target/sparc/overflow-2.c FAILs
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-10-24
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Most likely r265398, i.e. another far-reaching RTL change like r264897.
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Subject: [Bug c++/84436] [8/9 Regression] Missed optimization with switch on enum constants returning the same value
Date: Wed, 24 Oct 2018 13:52:00 -0000
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Oct 24 13:52:21 2018
New Revision: 265463
URL: https://gcc.gnu.org/viewcvs?rev=265463&root=gcc&view=rev
Log:
Switch conversion: support any ax + b transformation (PR
tree-optimization/84436).
2018-10-24 Martin Liska <mliska@suse.cz>
PR tree-optimization/84436
* tree-switch-conversion.c (switch_conversion::contains_same_values_p):
Remove.
(switch_conversion::contains_linear_function_p): New.
(switch_conversion::build_one_array): Support linear
transformation on input.
* tree-switch-conversion.h (struct switch_conversion): Add
contains_linear_function_p declaration.
2018-10-24 Martin Liska <mliska@suse.cz>
PR tree-optimization/84436
* gcc.dg/tree-ssa/pr84436-1.c: New test.
* gcc.dg/tree-ssa/pr84436-2.c: New test.
* gcc.dg/tree-ssa/pr84436-3.c: New test.
* gcc.dg/tree-ssa/pr84436-4.c: New test.
* gcc.dg/tree-ssa/pr84436-5.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr84436-1.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr84436-2.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr84436-3.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr84436-4.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr84436-5.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-switch-conversion.c
trunk/gcc/tree-switch-conversion.h
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Subject: [Bug c++/84436] [8/9 Regression] Missed optimization with switch on enum constants returning the same value
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
Implemented.
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Subject: [Bug rtl-optimization/87720] [9 Regression] [MIPS] ICE: gcc.c-torture/execute/builtins/lib/chk.c:33:1: in int_mode_for_mode, at stor-layout.c:403 after r265398
Date: Wed, 24 Oct 2018 14:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87720
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Hi Paul,
How can the mode of dest be different from that of the source? How does PC
get into this? Could you show an example of bad / good RTL?
>From gcc-bugs-return-618680-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 14:43:35 2018
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From: "dje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/85103] [8/9 Regression] Performance regressions on SPEC with r257582
Date: Wed, 24 Oct 2018 14:43:00 -0000
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David Edelsohn <dje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
--- Comment #11 from David Edelsohn <dje at gcc dot gnu.org> ---
Still waiting for improvement.
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From: "aldot at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87734] New: ICE in is_illegal_recursion check for character len= parameter
Date: Wed, 24 Oct 2018 14:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87734
Bug ID: 87734
Summary: ICE in is_illegal_recursion check for character len=
parameter
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: aldot at gcc dot gnu.org
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Created attachment 44891
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44891&action=edit
reduced from flibs-svncode/trunk/src/strings/m_vstring.f90 --
sf.net/projects/flibs
flibs-svncode/trunk/src/strings/m_vstring.f90
Builds fine with gfortran-4.8
ICEs with current trunk:
$ gfortran -c -o a.o m_vstring.f90
f951: internal compiler error: in is_illegal_recursion, at
fortran/resolve.c:1688
0x93f623 is_illegal_recursion
../../../src/gcc-9.0.mine/gcc/fortran/resolve.c:1688
0x942ff8 resolve_function
../../../src/gcc-9.0.mine/gcc/fortran/resolve.c:3294
0x94b2f7 gfc_resolve_expr(gfc_expr*)
../../../src/gcc-9.0.mine/gcc/fortran/resolve.c:6809
0x8b7256 gfc_reduce_init_expr(gfc_expr*)
../../../src/gcc-9.0.mine/gcc/fortran/expr.c:2799
0x896d3a gfc_match_char_spec(gfc_typespec*)
../../../src/gcc-9.0.mine/gcc/fortran/decl.c:3261
0x89860a gfc_match_decl_type_spec(gfc_typespec*, int)
../../../src/gcc-9.0.mine/gcc/fortran/decl.c:3904
0x89ba26 gfc_match_data_decl()
../../../src/gcc-9.0.mine/gcc/fortran/decl.c:5831
0x9265dd match_word
../../../src/gcc-9.0.mine/gcc/fortran/parse.c:65
0x927190 decode_statement
../../../src/gcc-9.0.mine/gcc/fortran/parse.c:376
0x92bca0 next_free
../../../src/gcc-9.0.mine/gcc/fortran/parse.c:1234
0x92c23f next_statement
../../../src/gcc-9.0.mine/gcc/fortran/parse.c:1466
0x92f6c4 parse_spec
../../../src/gcc-9.0.mine/gcc/fortran/parse.c:3860
0x93267d parse_progunit
../../../src/gcc-9.0.mine/gcc/fortran/parse.c:5671
0x93236d parse_contained
../../../src/gcc-9.0.mine/gcc/fortran/parse.c:5574
0x932d61 parse_module
(gdb) up
#1 0x000000000093f624 in is_illegal_recursion (sym=0x2ec81a0,
context=0x2ecbc80) at ../../../src/gcc-9.0.mine/gcc/fortran/resolve.c:1688
1688 gcc_assert (sym->attr.flavor == FL_PROCEDURE);
(gdb) p sym->name
$1 = 0x7ffff70ce6a0 "vstring_length"
(gdb) p sym->attr.flavor
$2 = FL_UNKNOWN
PS: to build the full flibs you currently have to
svn checkout
# fix the most severe bugs in the config script:
sed -i -e 's/==/=/g' -e 's/@$\([0-9]\)/"@$\1"/g' configure.sh
OSTYPE=linux-gnu ./configure.sh
cd make/makefile
make
>From gcc-bugs-return-618682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 14:51:59 2018
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Subject: [Bug ipa/85103] [8/9 Regression] Performance regressions on SPEC with r257582
Date: Wed, 24 Oct 2018 14:51:00 -0000
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--- Comment #12 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Does this qualify as a P2 bug? This is a serious degradation not only on P7
but also P8 and P9.
>From gcc-bugs-return-618683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 15:27:15 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87731] Detection of mismatched alloc/free pairs
Date: Wed, 24 Oct 2018 15:27:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-10-24
Blocks| |87403
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
With -fsanitize=address GCC diagnoses it.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
[Bug 87403] [Meta-bug] Issues that suggest a new warning
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Subject: [Bug c++/87732] Detect and eliminate unnecessary new/delete pairs
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Looks like a dup of PR 78104
>From gcc-bugs-return-618685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 15:33:12 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87731] Detection of mismatched alloc/free pairs
Date: Wed, 24 Oct 2018 15:33:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Daniel Fruzynski from comment #0)
> Valgrind also provides set of macros which allows it to track custom
> alloc/free functions. It would be nice if you add new attributes which could
> be attached to custom alloc and free functions, so gcc could check pairing
> for them too. I think of something like this:
>
> __attribute__((malloc("MyAllocType")))
> void* MyAlloc(size_t);
>
> __attribute__((free("MyAllocType")))
> void MyFree(void*);
That should be a separate enhancement request.
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Subject: [Bug rtl-optimization/87720] [9 Regression] [MIPS] ICE: gcc.c-torture/execute/builtins/lib/chk.c:33:1: in int_mode_for_mode, at stor-layout.c:403 after r265398
Date: Wed, 24 Oct 2018 15:42:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-10-24
Assignee|unassigned at gcc dot gnu.org |segher at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Okay I managed to build a cross-compiler. Confirmed; needs -O1 but nothing
more.
(set (pc) (reg:SI 25))
Huh, why did this not happen on any of my builds. I have a patch.
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Subject: [Bug other/87735] New: [9 regression] gcc.dg/tree-prof/time-profiler-1.c and -2.c and -3.c fail starting with 265454
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87735
Bug ID: 87735
Summary: [9 regression] gcc.dg/tree-prof/time-profiler-1.c and
-2.c and -3.c fail starting with 265454
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
> FAIL: gcc.dg/tree-prof/time-profiler-1.c scan-ipa-dump-times profile "Read tp_first_run: 1" 1
> FAIL: gcc.dg/tree-prof/time-profiler-2.c scan-ipa-dump-times profile "Read tp_first_run: 1" 2
> FAIL: gcc.dg/tree-prof/time-profiler-3.c scan-ipa-dump-times profile "Read tp_first_run: 1" 1
Executing on host: /home/seurer/gcc/build/gcc-trunk/gcc/xgcc
-B/home/seurer/gcc/build/gcc-trunk/gcc/
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/tree-prof/time-profiler-1.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -O2 -fdump-ipa-profile -fprofile-use -D_PROFILE_USE
-lm -o
/home/seurer/gcc/build/gcc-trunk/gcc/testsuite/gcc8/time-profiler-1.x02
(timeout = 300)
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-trunk/gcc/xgcc
-B/home/seurer/gcc/build/gcc-trunk/gcc/
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/tree-prof/time-profiler-1.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -O2 -fdump-ipa-profile -fprofile-use -D_PROFILE_USE
-lm -o /home/seurer/gcc/build/gcc-trunk/gcc/testsuite/gcc8/time-profiler-1.x02
PASS: gcc.dg/tree-prof/time-profiler-1.c compilation, -fprofile-use
-D_PROFILE_USE
Setting LD_LIBRARY_PATH to
:/home/seurer/gcc/build/gcc-trunk/gcc:/home/seurer/gcc/build/gcc-trunk/powerpc64-unknown-linux-gnu/./libatomic/.libs::/home/seurer/gcc/build/gcc-trunk/gcc:/home/seurer/gcc/build/gcc-trunk/powerpc64-unknown-linux-gnu/./libatomic/.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-7.2.0/lib64
Execution timeout is: 300
spawn [open ...]
PASS: gcc.dg/tree-prof/time-profiler-1.c execution, -fprofile-use
-D_PROFILE_USE
gcc.dg/tree-prof/time-profiler-1.c: pattern found 0 times
FAIL: gcc.dg/tree-prof/time-profiler-1.c scan-ipa-dump-times profile "Read
tp_first_run: 1" 1
PASS: gcc.dg/tree-prof/time-profiler-1.c scan-ipa-dump-times profile "Read
tp_first_run: 2" 1
PASS: gcc.dg/tree-prof/time-profiler-1.c scan-ipa-dump-times profile "Read
tp_first_run: 3" 1
>From gcc-bugs-return-618688-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 16:12:54 2018
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Subject: [Bug fortran/87734] ICE in is_illegal_recursion check for character len= parameter
Date: Wed, 24 Oct 2018 16:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87734
Bernhard Reutner-Fischer <aldot at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Known to work| |4.8.4, 4.9.2
Version|unknown |9.0
Target Milestone|--- |9.0
Known to fail| |6.4.0, 7.3.0, 8.2.0
>From gcc-bugs-return-618689-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 24 16:31:21 2018
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^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c++/87713] single character underlined in an error message instead of the whole token
[not found] <bug-87713-4@http.gcc.gnu.org/bugzilla/>
2018-10-23 18:51 ` [Bug c++/87713] single character underlined in an error message instead of the whole token msebor at gcc dot gnu.org
@ 2024-04-04 22:24 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-04-04 22:24 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87713
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2024-04-04
Ever confirmed|0 |1
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
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