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* [Bug regression/63177] New: Power/Linux no-vfa-vect-depend-2.c and no-vfa-vect-depend-3.c failures
@ 2014-09-04 17:16 macro@linux-mips.org
2014-09-04 18:07 ` [Bug regression/63177] Powerpc " dominiq at lps dot ens.fr
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: macro@linux-mips.org @ 2014-09-04 17:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63177
Bug ID: 63177
Summary: Power/Linux no-vfa-vect-depend-2.c and
no-vfa-vect-depend-3.c failures
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: regression
Assignee: unassigned at gcc dot gnu.org
Reporter: macro@linux-mips.org
Host: i686-linux-gnu
Target: powerpc-linux-gnu
I see these failures in 4.9/trunk Power/Linux testing:
FAIL: gcc.dg/vect/no-vfa-vect-depend-2.c scan-tree-dump-times vect "vectorized
1 loops" 1
FAIL: gcc.dg/vect/no-vfa-vect-depend-3.c scan-tree-dump-times vect "vectorized
1 loops" 4
These are new test cases as of 4.9. Only seen with AltiVec multilibs:
-mcpu=603e
-mcpu=603e -msoft-float
-mcpu=7400 -maltivec -mabi=altivec
-mcpu=e6500 -maltivec -mabi=altivec
-mcpu=e6500 -m64 -maltivec -mabi=altivec
Options used to configure the compiler:
--build=i686-pc-linux-gnu
--target=powerpc-linux-gnu
--with-cpu-32=603e
--with-cpu-64=e5500
--with-long-double-128
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug regression/63177] Powerpc no-vfa-vect-depend-2.c and no-vfa-vect-depend-3.c failures
2014-09-04 17:16 [Bug regression/63177] New: Power/Linux no-vfa-vect-depend-2.c and no-vfa-vect-depend-3.c failures macro@linux-mips.org
@ 2014-09-04 18:07 ` dominiq at lps dot ens.fr
2014-09-04 18:23 ` dominiq at lps dot ens.fr
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: dominiq at lps dot ens.fr @ 2014-09-04 18:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63177
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc-linux-gnu |powerpc*-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-09-04
CC| |iains at gcc dot gnu.org
Summary|Power/Linux |Powerpc
|no-vfa-vect-depend-2.c and |no-vfa-vect-depend-2.c and
|no-vfa-vect-depend-3.c |no-vfa-vect-depend-3.c
|failures |failures
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I also see that on powerpc-apple-darwin9 from r207636 up to r214282 (last
regtesting), but not for r206764.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug regression/63177] Powerpc no-vfa-vect-depend-2.c and no-vfa-vect-depend-3.c failures
2014-09-04 17:16 [Bug regression/63177] New: Power/Linux no-vfa-vect-depend-2.c and no-vfa-vect-depend-3.c failures macro@linux-mips.org
2014-09-04 18:07 ` [Bug regression/63177] Powerpc " dominiq at lps dot ens.fr
@ 2014-09-04 18:23 ` dominiq at lps dot ens.fr
2014-09-05 8:45 ` rguenth at gcc dot gnu.org
2018-06-06 18:47 ` [Bug target/63177] " bergner at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: dominiq at lps dot ens.fr @ 2014-09-04 18:23 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63177
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |ppluzhnikov at gcc dot gnu.org
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The tests were introduced at revision r207225 by Jakub Jelinek and
gcc.dg/vect/no-vfa-vect-depend-2.c has been updated at r207872 by ppluzhnikov.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug regression/63177] Powerpc no-vfa-vect-depend-2.c and no-vfa-vect-depend-3.c failures
2014-09-04 17:16 [Bug regression/63177] New: Power/Linux no-vfa-vect-depend-2.c and no-vfa-vect-depend-3.c failures macro@linux-mips.org
2014-09-04 18:07 ` [Bug regression/63177] Powerpc " dominiq at lps dot ens.fr
2014-09-04 18:23 ` dominiq at lps dot ens.fr
@ 2014-09-05 8:45 ` rguenth at gcc dot gnu.org
2018-06-06 18:47 ` [Bug target/63177] " bergner at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-09-05 8:45 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63177
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The version-for-alias code makes choices dependent on ordering of data
references
which changes from time to time. I've repeatedly tried to clean up the code
but only manage to break more testcases where the things they are testing are
often odd (and wrong?).
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/63177] Powerpc no-vfa-vect-depend-2.c and no-vfa-vect-depend-3.c failures
2014-09-04 17:16 [Bug regression/63177] New: Power/Linux no-vfa-vect-depend-2.c and no-vfa-vect-depend-3.c failures macro@linux-mips.org
` (2 preceding siblings ...)
2014-09-05 8:45 ` rguenth at gcc dot gnu.org
@ 2018-06-06 18:47 ` bergner at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: bergner at gcc dot gnu.org @ 2018-06-06 18:47 UTC (permalink / raw)
To: gcc-bugs
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="UTF-8", Size: 3608239 bytes --]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63177
--- Comment #11 from Peter Bergner <bergner at gcc dot gnu.org> ---
Fixed on trunk. I'll check how far back we need to back port this to and fix
it there too.
>From gcc-bugs-return-606639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 06 18:49:35 2018
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From: "charlie at sallyandcharlie dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86065] gfortran NAMELIST improperly reads arrays that span more than one line.
Date: Wed, 06 Jun 2018 18:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86065
--- Comment #4 from Charlie <charlie at sallyandcharlie dot com> ---
Thank you.
I ran "MinGW Installation Manager" and it installed gfortran v 6.3.0-1
That version appears to work fine for my namelist array problem.
I'm not sure how to upgrade beyond 6.3.0-1 to the versions mentioned in the
"known to work" section (6.4.1, 7.3.1, 8.1.1, 9.0)
but my immediate problem is certainly fixed.
Thanks Again,
Charlie
-----Original Message-----
From: kargl at gcc dot gnu.org [mailto:gcc-bugzilla@gcc.gnu.org]
Sent: Wednesday, June 6, 2018 10:52 AM
To: charlie@sallyandcharlie.com
Subject: [Bug fortran/86065] gfortran NAMELIST improperly reads arrays that
span more than one line.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86065
kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Known to work| |6.4.1, 7.3.1, 8.1.1, 9.0
Resolution|--- |WORKSFORME
--- Comment #3 from kargl at gcc dot gnu.org ---
Resolving as WORKSFORME. Thanks for the bug report.
I do encourage you to upgrade to a newer version of
gfortran if you can.
>From gcc-bugs-return-606640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 06 19:39:10 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++/85577] list-initialization chooses initializer-list constructor
Date: Wed, 06 Jun 2018 19:39:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Can the testcase be turned into a runtime test? I couldn't figure it out (how
to construct A).
>From gcc-bugs-return-606641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 06 19:51:09 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/86057] Use of mempcpy in libgcc/ libgcov-driver-system.c breaks bootstrap
Date: Wed, 06 Jun 2018 19:51:00 -0000
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--- Comment #8 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
> Sorry for the breakage, patch candidate sent here:
> https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00285.html
Now successfully bootstrapped without regressions on i386-pc-solaris2.11
and sparc-sun-solaris2.11.
Rainer
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Subject: [Bug c++/82930] [C++17] ICE: in is_normal_capture_proxy, at cp/lambda.c:288 with structured binding in a lambda function with auto typed arguments
Date: Wed, 06 Jun 2018 19:56:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |mpolacek at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed in r257761.
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Subject: [Bug c++/83996] [6/7 Regression] ICE with zero-sized array
Date: Wed, 06 Jun 2018 20:04:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/86063] [6/7/8/9 Regression] g++ ICE at tree check: expected tree_list, have expr_pack_expansion in cp_check_const_attributes, at cp/decl2.c:1391
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
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Subject: [Bug c++/85958] Make const qualifier error clear
Date: Wed, 06 Jun 2018 20:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85958
--- Comment #10 from Jonny Grant <jg at jguk dot org> ---
(In reply to Jonathan Wakely from comment #7)
> (In reply to Jonny Grant from comment #5)
> > I personally feel "bind" is not a word any programming course teaches, we
> > say "passing parameters" or "passing arguments".
>
> You pass arguments, which initialize parameters. Initialization of
> references is called binding.
Our C++ lectures always said "pass by reference". A quick search online seems
to say similar. Although I appreciate compiler developers will always use more
formally accurate terms.
https://stackoverflow.com/questions/373419/whats-the-difference-between-passing-by-reference-vs-passing-by-value
> >
> > In addition, I feel we don't think we really need the word "reference"
>
> If the parameter type wasn't a reference there would be no problem. Omitting
> the reason it fails seems unhelpful.
My reasoning for not listing the word "reference" is that "int&" includes the
symbol & which means reference. But a little duplication is ok.. only one
word.
> > Therefore, I suggest the following:
> >
> > $ g++ -o main main.cpp -Wall -Werror -Wconversion
> > main.cpp: In function ‘int main()’:
> > main.cpp:11:25: error: cannot pass ‘const int’ to non-const ‘int&’
>
> No this is nonsense. You are not passing something to a reference, you are
> passing it to the function. The object cannot be bound to the reference
> because of the cv-qualifiers.
Ok, point taken you are right.
So this I suggest:
main.cpp:11:25: error: cannot pass ‘const int’ by non-const ‘int&’
Or with the "reference" word:
main.cpp:11:25: error: cannot pass ‘const int’ by non-const ‘int&’ reference.
Although i do like W E Brown suggestion, I took out the "type":
"can't initialize parameter reference 'int&' with argument 'const int'"
> I'm keen to make the language clearer, but not by making it simply wrong
> about what's happening!
great! :)
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Subject: [Bug c++/85577] list-initialization chooses initializer-list constructor
Date: Wed, 06 Jun 2018 20:52:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
To construct an A you'd need to add:
A() = default;
But this might actually be INVALID, due to Core DR 2137.
I'll look into it tomorrow.
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Subject: [Bug target/85657] Make __ibm128 a separate type, even if long double uses the IBM double-double format
Date: Wed, 06 Jun 2018 21:11:00 -0000
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--- Comment #4 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Wed Jun 6 21:11:15 2018
New Revision: 261246
URL: https://gcc.gnu.org/viewcvs?rev=261246&root=gcc&view=rev
Log:
[gcc]
2018-06-06 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000.c (rs6000_passes_ieee128): New boolean to
track if we pass or return IEEE 128-bit floating point.
(ieee128_mangling_gcc_8_1): New boolean to say whether to generate
C++ mangling that is compatible with GCC 8.1.
(TARGET_ASM_GLOBALIZE_DECL_NAME): Override target hook.
(init_cumulative_args): Note if we pass or return IEEE 128-bit
floating point types.
(rs6000_function_arg_advance_1): Likewise.
(rs6000_mangle_type): Optionally generate mangled names that match
what GCC 8.1 generated for IEEE 128-bit floating point types.
(rs6000_globalize_decl_name): If we have an external function that
passes or returns IEEE 128-bit types, generate a weak reference
from the mangled name used in GCC 8.1 to the current mangled
name.
[gcc]
2018-06-05 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000.c (rs6000_init_builtins): Make __ibm128 use
the long double type if long double is IBM extended double. Make
__float128 use the long double type if long double is IEEE 128-bit.
[gcc/testsuite]
2018-06-05 Michael Meissner <meissner@linux.ibm.com>
PR target/85657
* g++.dg/pr85657.C: Only test whether __ibm128 and long double can
be used in templates. Don't check for them in overloaded functions.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/pr85657.C
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Subject: [Bug fortran/85641] [7/8/9 Regression] ICE with string concatenate
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
This looks good:
--- frontend-passes.c (Revision 261245)
+++ frontend-passes.c (Arbeitskopie)
@@ -57,6 +57,8 @@ static bool has_dimen_vector_ref (gfc_expr *);
static int matmul_temp_args (gfc_code **, int *,void *data);
static int index_interchange (gfc_code **, int*, void *);
+static bool is_fe_temp (gfc_expr *e);
+
#ifdef CHECKING_P
static void check_locus (gfc_namespace *);
#endif
@@ -254,6 +256,9 @@ realloc_string_callback (gfc_code **c, int *walk_s
|| !expr1->ts.deferred)
return 0;
+ if (is_fe_temp (expr1))
+ return 0;
+
expr2 = gfc_discard_nops (co->expr2);
if (expr2->expr_type == EXPR_VARIABLE)
>From gcc-bugs-return-606649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 06 21:42:07 2018
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Subject: [Bug fortran/85641] [7/8/9 Regression] ICE with string concatenate
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--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Wed Jun 6 21:41:29 2018
New Revision: 261248
URL: https://gcc.gnu.org/viewcvs?rev=261248&root=gcc&view=rev
Log:
2018-06-06 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/85641
* frontend-passes.c (is_fe_temp): Add prototype.
(realloc_string_callback): Early return for frontend-generated
temporary.
2018-06-06 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/85641
* gfortran.dg/realloc_on_assign_30.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/realloc_on_assign_30.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/frontend-passes.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/85657] Make __ibm128 a separate type, even if long double uses the IBM double-double format
Date: Wed, 06 Jun 2018 22:54:00 -0000
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--- Comment #5 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Wed Jun 6 22:54:17 2018
New Revision: 261253
URL: https://gcc.gnu.org/viewcvs?rev=261253&root=gcc&view=rev
Log:
[gcc]
2018-06-06 Michael Meissner <meissner@linux.ibm.com>
PR target/85657
* config/rs6000/rs6000-builtin.def (BU_IBM128_2): New helper
macro for __ibm128 built-in functions.
(PACK_IF): Add __ibm128 pack/unpack functions.
(UNPACK_IF): Likewise.
* config/rs6000/rs6000.c (rs6000_builtin_mask_calculate): Do not
enable long double built-in functions if long double is IEEE
128-bit floating point.
(rs6000_invalid_builtin): Update long double built-in function
error message.
(rs6000_expand_builtin): For PACK_IF and UNPACK_IF built-in
functions, adjust the built-in function to use the long double
built-in function if __ibm128 and long double are the same type.
* doc/extend.texi (PowerPC builtins): Update documention for
__builtin_{,un}pack_longdouble. Add documentation for
__builtin_{,un}pack_ibm128.
[gcc/testsuite]
2018-06-06 Michael Meissner <meissner@linux.ibm.com>
PR target/85657
* gcc.target/powerpc/pr85657-4.c: New tests.
* gcc.target/powerpc/pr85657-5.c: Likewise.
* gcc.target/powerpc/pr85657-6.c: Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000-builtin.def
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/doc/extend.texi
trunk/gcc/testsuite/ChangeLog
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86074] New: gcc fails to compile a code sample
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Bug ID: 86074
Summary: gcc fails to compile a code sample
Product: gcc
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Created attachment 44242
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44242&action=edit
memory leak
The code sample comes from https://bugs.llvm.org/show_bug.cgi?id=20335
The latest llvm can compile the attached code sample, but gcc produces many
errors.
BTW, the llvm bug report says that the attached code triggers memory leak.
Please check whether it also triggers memory leak on GCC.
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Subject: [Bug tree-optimization/86075] New: dead store elimination defeats strlen optimization after memset zero followed by strcpy
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86075
Bug ID: 86075
Summary: dead store elimination defeats strlen optimization
after memset zero followed by strcpy
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
GCC emits optimally efficient code for the first of the two equivalent
functions below but generates very inefficient code for the latter. First, it
zeroes out the entire array even though only a small part of it is used.
Worse, (and ironically) because it eliminates the store to a[3] as dead early
on (in fre1) and before the strlen pass runs, the strlen optimization isn't
performed, and so the entire dead body of the function isn't eliminated.
Since unnecessarily zeroing-out storage just before storing strings in it is
common practice, detecting and handling it could lead to significant
improvements. The solution for the missing strlen optimization in this case
could be as simple as enhancing the strlen pass to track not just string
lengths but also sizes of zeroed-out blocks of storage used for strings.
$ cat c.c && gcc -O2 -S -Wall -Wextra -fdump-tree-optimized=/dev/stdout c.c
void f (void)
{
char a[4096];
__builtin_memcpy (a, "123", 3);
a[3] = 0;
if (__builtin_strlen (a) != 3) // folded
__builtin_abort ();
}
void g (void)
{
char a[4096] = ""; // all bytes zeroed out
__builtin_memcpy (a, "123", 3);
a[3] = 0; // eliminated
if (__builtin_strlen (a) != 3) // not folded
__builtin_abort ();
}
;; Function f (f, funcdef_no=0, decl_uid=1956, cgraph_uid=0, symbol_order=0)
f ()
{
<bb 2> [local count: 1073741825]:
return;
}
;; Function g (g, funcdef_no=1, decl_uid=1960, cgraph_uid=1, symbol_order=1)
g ()
{
char a[4096];
long unsigned int _1;
<bb 2> [local count: 1073741825]:
a = "";
__builtin_memcpy (&a, "123", 3);
_1 = __builtin_strlen (&a);
if (_1 != 3)
goto <bb 3>; [0.00%]
else
goto <bb 4>; [99.96%]
<bb 3> [count: 0]:
__builtin_abort ();
<bb 4> [local count: 1073312327]:
a ={v} {CLOBBER};
return;
}
>From gcc-bugs-return-606653-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 01:10:19 2018
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Subject: [Bug target/86067] [MIPS] ICE: scal-to-vec1.c:86:1: error: unrecognizable insn with -march=loongson3a
Date: Thu, 07 Jun 2018 01:10:00 -0000
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--- Comment #2 from Paul Hua <paul.hua.gm at gmail dot com> ---
(In reply to Richard Biener from comment #1)
> Which GCC version did you use?
the trunk version (r261200)
It's also ICEed on gcc-7 and gcc-8.
>From gcc-bugs-return-606654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 01:26:21 2018
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Subject: [Bug libfortran/86070] [7 regression] gfortran.dg/fmt_zero_digits.f90 segmentation fault starting with r261077
Date: Thu, 07 Jun 2018 01:26:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-07
Assignee|unassigned at gcc dot gnu.org |jvdelisle at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Mine, not sure why that patch would break it. I had to manually apply to 7
branch so maybe I flubbed it.
>From gcc-bugs-return-606656-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 02:19:42 2018
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Subject: [Bug tree-optimization/86076] [9 Regression] ICE: verify_gimple failed (error: location references block not in block tree)
Date: Thu, 07 Jun 2018 02:19:00 -0000
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--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
int __attribute__ ((noinline))
lv (int tm)
{
(void) tm;
return 0;
}
void
o7 (int uu)
{
while (uu < 1)
while (uu != 0)
{
short int ca;
ca = lv (0);
(void) ca;
++uu;
}
lv (lv (0));
}
>From gcc-bugs-return-606655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 02:19:03 2018
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Subject: [Bug tree-optimization/86076] New: [9 Regression] ICE: verify_gimple failed (error: location references block not in block tree)
Date: Thu, 07 Jun 2018 02:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86076
Bug ID: 86076
Summary: [9 Regression] ICE: verify_gimple failed (error:
location references block not in block tree)
Product: gcc
Version: 9.0
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gcc-9.0.0-alpha20180603 snapshot (r261132) ICEs when compiling the following
snippet w/ -O2 (-O3, -Ofast) -ftree-parallelize-loops=2 -fno-tree-dce
-fno-tree-pre -fno-tree-vrp --param max-loop-header-insns=1:
% gcc-9.0.0-alpha20180603 -O2 -ftree-parallelize-loops=2 -fno-tree-dce
-fno-tree-pre -fno-tree-vrp --param max-loop-header-insns=1 -c gjp2o2cc.c
gjp2o2cc.c: In function 'o7':
gjp2o2cc.c:10:1: error: location references block not in block tree
o7 (int uu)
^~
lv.constprop
_2 = lv.constprop ();
during GIMPLE pass: ompexpssa
gjp2o2cc.c:10:1: internal compiler error: verify_gimple failed
0xce3469 verify_gimple_in_cfg(function*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/tree-cfg.c:5401
0xbbebaf execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/passes.c:1994
0xbbfafe execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/passes.c:2048
>From gcc-bugs-return-606657-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 04:22:14 2018
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Subject: [Bug bootstrap/86057] Use of mempcpy in libgcc/ libgcov-driver-system.c breaks bootstrap
Date: Thu, 07 Jun 2018 04:22:00 -0000
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Jun 7 04:21:35 2018
New Revision: 261260
URL: https://gcc.gnu.org/viewcvs?rev=261260&root=gcc&view=rev
Log:
Fix libgcov-driver-system bootstrap failure (PR bootstrap/86057).
2018-06-07 Martin Liska <mliska@suse.cz>
PR bootstrap/86057
* libgcov-driver-system.c (replace_filename_variables): Use
memcpy instead of mempcpy.
(allocate_filename_struct): Do not allocate filename, allocate
prefix and set it.
(gcov_exit_open_gcda_file): Allocate memory for gf->filename
here and properly copy content into it.
* libgcov-driver.c (struct gcov_filename): Remove max_length
field, change prefix from size_t into char *.
(compute_summary): Do not calculate longest filename.
(gcov_do_dump): Release memory of gf.filename after each file.
* libgcov-util.c (compute_summary): Use new signature of
compute_summary.
(calculate_overlap): Likewise.
Modified:
trunk/libgcc/ChangeLog
trunk/libgcc/libgcov-driver-system.c
trunk/libgcc/libgcov-driver.c
trunk/libgcc/libgcov-util.c
>From gcc-bugs-return-606658-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 04:23:50 2018
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Subject: [Bug bootstrap/86057] Use of mempcpy in libgcc/ libgcov-driver-system.c breaks bootstrap
Date: Thu, 07 Jun 2018 04:23:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-606659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 05:06:43 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86076] [7/8/9 Regression] ICE: verify_gimple failed (error: location references block not in block tree)
Date: Thu, 07 Jun 2018 05:06:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-07
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Summary|[9 Regression] ICE: |[7/8/9 Regression] ICE:
|verify_gimple failed |verify_gimple failed
|(error: location references |(error: location references
|block not in block tree) |block not in block tree)
Ever confirmed|0 |1
Known to fail| |7.1.0, 8.1.0, 9.0
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, note that I see it also on GCC 7 and 8 branches.
Started with an unrelated commit I guess: r241329.
>From gcc-bugs-return-606660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 05:10:15 2018
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Subject: [Bug c++/86074] gcc fails to compile a code sample
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Note that ICC 18 also rejects with:
<source>(33): error: function template "operator==" has already been defined
friend bool operator==(SimpleAllocator<U> const & lhs, SimpleAllocator<V>
const & rhs)
^
detected during:
instantiation of class "SimpleAllocator<T> [with T=char]" at line
88 of
"/opt/compiler-explorer/gcc-6.3.0/bin/../include/c++/6.3.0/bits/alloc_traits.h"
instantiation of class "std::allocator_traits<_Alloc> [with
_Alloc=SimpleAllocator<char>]" at line 52 of
"/opt/compiler-explorer/gcc-6.3.0/bin/../include/c++/6.3.0/ext/alloc_traits.h"
instantiation of class "__gnu_cxx::__alloc_traits<_Alloc> [with
_Alloc=SimpleAllocator<char>]" at line 75 of
"/opt/compiler-explorer/gcc-6.3.0/bin/../include/c++/6.3.0/bits/basic_string.h"
instantiation of class "std::__cxx11::basic_string<_CharT, _Traits,
_Alloc> [with _CharT=char, _Traits=std::char_traits<char>,
_Alloc=SimpleAllocator<char>]" at line 56
<source>(39): error: function template "operator!=" has already been defined
friend bool operator!=(SimpleAllocator<U> const & lhs, SimpleAllocator<V>
const & rhs)
^
detected during:
instantiation of class "SimpleAllocator<T> [with T=char]" at line
88 of
"/opt/compiler-explorer/gcc-6.3.0/bin/../include/c++/6.3.0/bits/alloc_traits.h"
instantiation of class "std::allocator_traits<_Alloc> [with
_Alloc=SimpleAllocator<char>]" at line 52 of
"/opt/compiler-explorer/gcc-6.3.0/bin/../include/c++/6.3.0/ext/alloc_traits.h"
instantiation of class "__gnu_cxx::__alloc_traits<_Alloc> [with
_Alloc=SimpleAllocator<char>]" at line 75 of
"/opt/compiler-explorer/gcc-6.3.0/bin/../include/c++/6.3.0/bits/basic_string.h"
instantiation of class "std::__cxx11::basic_string<_CharT, _Traits,
_Alloc> [with _CharT=char, _Traits=std::char_traits<char>,
_Alloc=SimpleAllocator<char>]" at line 56
compilation aborted for <source> (code 2)
Compiler returned: 2
Is it really a valid code snippet?
>From gcc-bugs-return-606661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 05:16:38 2018
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Subject: [Bug c++/86074] gcc fails to compile a code sample
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Moving the definition of the operator== and operator!= out from the template
class, then the code works.
>From gcc-bugs-return-606663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 05:58:55 2018
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Subject: [Bug c++/86074] gcc fails to compile a code sample
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Yeah, it's invalid. The template friend operator== function's signature does
not depend on the enclosing template at all. so, when instantiated in say
simpleAllocator<char> and simpleAllocator<short>, will collide.
>From gcc-bugs-return-606662-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 05:58:35 2018
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Subject: [Bug pending/86077] New: gcc does not recognize --param key=value when surrounded by single quotes
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Bug ID: 86077
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gcc 5.5.0
when trying to build tensorflow using bazel
if i specify flags, it for some of the commands automatically wraps them in
single quotes, thus errors like
gcc: error: unrecognized command line option '--param
max-inline-insns-single=500'
copy-find-replace-pasting the command to remove the single-quotes removes the
error but there are so many files!, rather unfeasible to do this manually
i don't if this is bazel's fault more or gcc, could it be fixed here?
>From gcc-bugs-return-606664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 06:21:10 2018
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Subject: [Bug pending/86077] gcc does not recognize --param key=value when surrounded by single quotes
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
this is standard unix option processing. That is --param and key=value are two
different arguments.
This should be fixed in bazel really. There are other arguments like --param
really. -Xlinker, -Xassembler, and -Xpreprocessor .
>From gcc-bugs-return-606665-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 06:26:19 2018
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Subject: [Bug web/86078] New: Documentation: missing param default values
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in
https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html
or https://gcc.gnu.org/onlinedocs/gcc-5.5.0/gcc/Optimize-Options.html
or whatever number,
the params section at the bottom does not link/reference
source-code e.g. https://github.com/gcc-mirror/gcc/blob/master/gcc/params.def
it contains max,min and default values, along with description, includes
default values not mentioned in documentation, along with disagreements
e.g.
sched-state-edge-prob-cutoff&selsched-insns-to-rename in docs(gcc6+) changes
name, err correction, but not reflected|updated in older doc versions
could this be automated/scripted (link to source-code) to reduce human errors?
missing default doc
max-crossjump-edges=100
max-delay-slot-insn-search=100
max-delay-slot-live-search=333
max-gcse-memory=50*1024*1024 (2015)
max-gcse-memory=128*1024*1024 (2018)
max-modulo-backtrack-attempts=40
iv-consider-all-candidates-bound=30(2015)
iv-consider-all-candidates-bound=40(2018)
iv-max-considered-uses=250
scev-max-expr-size=100
scev-max-expr-complexity=10
max-partial-antic-length=100
devirt-type-list-size(4.6),ipa-cp-value-list-size(4.7+)=8
max-slsr-cand-scan=50(4.8+)
ipa-max-agg-items=16(4.9+)
ipa-max-aa-steps=25000(5+)
max-ssa-name-query-depth=3(6+)
max-speculative-devirt-maydefs=50(6+)
max-stores-to-merge=64(7+)
dse-max-object-size=256(7+)
Not mentioned @docs except SourceCode
max-tracked-strlens=10000
what impact do they have,
anyway to emit debug info to show whether compilation hit limits?
to generalize, for benchmarks should an average of params be used?
should gcc params better reflect the host-compile-machine instead of a
one-size-fits all (compiling on mobile|desktop|workstation|server, new|old)
another question: when compiling using link-time-optimization-LTO,
since it's bunched into a single unit would it hit the limits sooner and should
it be compensated for against
any mechanism for compile more/less aggressively based on usage patters, how
much (CPU-time|usage/day) a program uses (relevance)
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
params are not designed for every day user of GCC. They are designed to make
it is easier to debug GCC heuristics and tune them easier.
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Subject: [Bug tree-optimization/85935] [8/9 Regression] [graphite] ICE in extract_affine, at graphite-sese-to-poly.c:287
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 7 07:01:56 2018
New Revision: 261263
URL: https://gcc.gnu.org/viewcvs?rev=261263&root=gcc&view=rev
Log:
2018-06-07 Richard Biener <rguenther@suse.de>
PR tree-optimization/85935
* graphite-scop-detection.c (find_params_in_bb): Analyze
condition operands with respect to the correct loop. Assert
the analysis doesn't fail.
* gcc.dg/graphite/pr85935.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/graphite/pr85935.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/graphite-scop-detection.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606668-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 07:04:38 2018
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Subject: [Bug c++/85885] internal compiler error, gimplify.c related
Date: Thu, 07 Jun 2018 07:04:00 -0000
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--- Comment #2 from Huiqun Zhou <hqzhou at nju dot edu.cn> ---
Hi，
I've tried several version of gcc, here is a brief report:
My OS: CentOS 7 update 5
Target code: lammps 16Mar2018
gcc version result
4.8.5 fail
6.3.1 success
7.2.1 fail
7.3.1 fail
8.1.0 uncertain
With gcc 8.1.0, I got a lot of other errors, and failed to make certain
whether the compilation passed the reported error.
Thanks!
Huiqun Zhou
@Earth Sciences, Nanjing University
------------------ Original ------------------
From: "rguenth at gcc dot gnu.org"<gcc-bugzilla@gcc.gnu.org>;
Date: Wed, May 23, 2018 07:23 PM
To: "hqzhou"<hqzhou@nju.edu.cn>;
Subject: [Bug c++/85885] internal compiler error, gimplify.c related
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85885
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-05-23
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Please try newer GCC and please attach preprocessed source as indicated by
https://gcc.gnu.org/bugs.html
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Subject: [Bug tree-optimization/85935] [8 Regression] [graphite] ICE in extract_affine, at graphite-sese-to-poly.c:287
Date: Thu, 07 Jun 2018 07:12:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[8/9 Regression] [graphite] |[8 Regression] [graphite]
|ICE in extract_affine, at |ICE in extract_affine, at
|graphite-sese-to-poly.c:287 |graphite-sese-to-poly.c:287
Known to fail| |8.1.0
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-606670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 07:28:49 2018
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Subject: [Bug tree-optimization/85964] [8/9 Regression] compile time hog w/ -O3 -ftracer -fno-guess-branch-probability
Date: Thu, 07 Jun 2018 07:28:00 -0000
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--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
On both trunk and branch the tracer induced issue is fixed and the backwards
threading compile-time-hog remains (which may very well be a dup of PR69580).
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Subject: [Bug tree-optimization/69615] 0 to limit signed range checks don't always use unsigned compare
Date: Thu, 07 Jun 2018 07:41:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jun 7 07:41:18 2018
New Revision: 261264
URL: https://gcc.gnu.org/viewcvs?rev=261264&root=gcc&view=rev
Log:
PR tree-optimization/69615
* tree-ssa-reassoc.c (optimize_range_tests_var_bound): If rhs2 is lhs
of a cast from a same precision integral SSA_NAME in a bb dominated
by first_bb, retry with rhs2 set to the rhs1 of the cast. Don't emit
cast to utype if rhs2 has already a compatible type.
* gcc.dg/tree-ssa/pr69615.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr69615.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-reassoc.c
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Subject: [Bug tree-optimization/84353] [8/9 Regression] [graphite] ICE in set_codegen_error, at graphite-isl-ast-to-gimple.c:206
Date: Thu, 07 Jun 2018 07:46:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'm testing a cleanup/fix in this area but ultimatively we have no way of
code-generating this 1:1 so unless we invent more magic pattern-matching a
code-generating failure and thus late abort is the correct thing to do.
We might want to revisit the fact that we punt on this by ICEing with
-fchecking...
Getting more testcase for this is nice though. Getting some brains
inventing patterns we could detect to code-generate expressions like
if (((-P_9 + 18446744073709551615) % 18446744073709551616) + P_1 <=
18446744073709551614 || ((-P_9 + 18446744073709551615) % 18446744073709551616)
+ P_1 >= 18446744073709551616)
with a data type that cannot represent the above would be nice as well.
Note that even a simple P_9 + P_9 might not be representable but wrap/overflow
in the type we code-generate in (which is fixed! to be the "largest" integer
type the target supports). So in reality some range information is needed
which we _may_ be able to recover. Still there will be obviously corner-cases
where we have to give up unless ISL can make guarantees on the value-space
of IVs and parameter expressions it generates.
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Subject: [Bug middle-end/86078] Documentation: missing param default values
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2018-06-07
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
There is -Wdisabled-optimization, unfortunately it is used in only 3 places
where we give up due to some limits.
Note not in all cases such warnings are warranted - it's often a concious
decision to limit algorithms to linear growth and warning when you hit
limits to enforce that would lead to the false impression that if you
lift the limit you will get more optimization. I'm thinking of the alias
stmt walkers for example.
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Subject: [Bug driver/86077] gcc does not recognize --param key=value when surrounded by single quotes
Date: Thu, 07 Jun 2018 08:05:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
You can use alternative syntax --param=max-inline-insns-sinle=500 (note the
space being replaced with a =).
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Subject: [Bug tree-optimization/86076] [7/8/9 Regression] ICE: verify_gimple failed (error: location references block not in block tree)
Date: Thu, 07 Jun 2018 08:07:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |openmp
Priority|P3 |P2
Target Milestone|--- |7.4
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks like some issue with autopar outlining.
Note such cases are a recipie for GC issues since the referenced BLOCK isn't
kept live by references from locations. The BLOCK in the other function can
get removed/GCed. Those issues are hard to track down which is why we have
this verifier...
>From gcc-bugs-return-606676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 08:09:55 2018
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Subject: [Bug tree-optimization/86075] dead store elimination defeats strlen optimization after memset zero followed by strcpy
Date: Thu, 07 Jun 2018 08:09:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
But then the strlen pass should see the zeroing and then notice the memcpy will
produce a 0-terminated string. The user might have written this w/o the
a[3] = 0 in place after all.
So IMHO not a DSE fault but possibly a dup of another strlen missed
optimization.
>From gcc-bugs-return-606677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 08:20:54 2018
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Subject: [Bug target/86073] -O3 arm generates calls to memset even for known at the compile time very small sizes (<=3)
Date: Thu, 07 Jun 2018 08:20:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Probably arm misses the setup to handle this via can_store_by_pieces or
set_storage_via_setmem. What arm subarchitecture are you creating code for?
On x86 with -m32 the 'size' loop isn't recognized as memset at the GIMPLE
level (it isn't a memset after all) and we expand the 'pro' loop as memset
call but not the 'rem' loop.
Note that pro seems to be MAX(size, <st> & 3) so it isn't really <= 3.
Thus, x86 is working fine but arm isn't.
>From gcc-bugs-return-606678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 08:27:10 2018
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Subject: [Bug tree-optimization/86072] Poor codegen with atomics
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Andrew is right. Still confirmed.
Somebody has to decide if it's worth optimizing them and has to sit down and
exactly specify what kind of optimizations are valid.
I guess it's worth optimizing them if these cases appear in real-world code
(and then we'd like to see examples).
As for validity not optimizing them leads to (wanted/required) side-effects
like being a barrier for a lot of compiler optimizations. Which may mor
may not be designed that way. I'm sitting on patches teaching points-to
about atomics, specifically making them not escape points or uses/clobbers
for all memory. Esp. the latter I'm not sure is a good idea to improve,
because there's nothing in the compiler making atomics "special", they
are just modeled as function calls.
>From gcc-bugs-return-606679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 08:28:16 2018
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Subject: [Bug libfortran/86070] [7 regression] gfortran.dg/fmt_zero_digits.f90 segmentation fault starting with r261077
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-606680-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 08:31:50 2018
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Subject: [Bug c++/86060] [6/7/8/9 Regression] g++ ICE at on with "c++03" in tsubst_copy, at cp/pt.c:15459
Date: Thu, 07 Jun 2018 08:31:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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CC| |clyon at gcc dot gnu.org
--- Comment #5 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Hi,
With the patch, I can see that
FAIL: g++.dg/cpp0x/range-for9.C -std=c++98
The log contains:
/gcc/testsuite/g++.dg/cpp0x/range-for9.C: In function 'void test()':
/gcc/testsuite/g++.dg/cpp0x/range-for9.C:8:18: error: range-based 'for' loops
only available with -std=c++11 or -std=gnu++11
/gcc/testsuite/g++.dg/cpp0x/range-for9.C:8:18: error: forming reference to
reference type 'int (&)[3]'
compiler exited with status 1
PASS: g++.dg/cpp0x/range-for9.C -std=c++98 (test for errors, line 8)
FAIL: g++.dg/cpp0x/range-for9.C -std=c++98 (test for excess errors)
>From gcc-bugs-return-606681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 08:50:52 2018
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Subject: [Bug preprocessor/86079] New: preprocessor fails to splice lines
Date: Thu, 07 Jun 2018 08:50:00 -0000
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Bug ID: 86079
Summary: preprocessor fails to splice lines
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While gcc 4.3 looks to still handle this correctly, at least all versions from
4.7 onwards (I don't have the intermediate versions readily available to check)
fail to splice lines where the first one ends in an escaped newline, at least
in the common case. Note the inconsistency with
unsigned \
int \\
u \\\
;
where the second and third lines are being spliced by "gcc -E", but none of the
others.
This is a clear violation of the standard's translation phase 2, making it
impossible to e.g. preprocess something like
https://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=xen/include/asm-x86/alternative-asm.h;h=0b6151634a01e9662ae4100dcaf3c0736885eb87;hb=refs/heads/staging
into code usable by the .s files produced by the compiler.
>From gcc-bugs-return-606682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 08:56:47 2018
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Subject: [Bug preprocessor/86079] preprocessor fails to splice lines
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--- Comment #1 from jbeulich at novell dot com ---
Interesting - with -P the problem goes away.
>From gcc-bugs-return-606683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 09:02:37 2018
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Subject: [Bug preprocessor/86079] preprocessor fails to splice lines
Date: Thu, 07 Jun 2018 09:02:00 -0000
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--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
I don't see any difference in the preprocessor out with or without -P apart
from the line comments.
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Subject: [Bug preprocessor/86079] preprocessor fails to splice lines
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--- Comment #3 from Andreas Schwab <schwab@linux-m68k.org> ---
Did you use -xassembler-with-cpp? Without that it's INVALID.
>From gcc-bugs-return-606685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 09:34:59 2018
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Subject: [Bug preprocessor/86079] preprocessor fails to splice lines
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--- Comment #4 from jbeulich at novell dot com ---
(In reply to Andreas Schwab from comment #3)
> Did you use -xassembler-with-cpp? Without that it's INVALID.
No, I did not, and the example given also is plain C code (minus the too many
backslashes, which I've added just for demonstrating the issue - if you reduce
them to one per line, I think you'll see the difference).
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Subject: [Bug fortran/49213] [OOP] gfortran rejects structure constructor expression
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janus at gcc dot gnu.org changed:
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--- Comment #28 from janus at gcc dot gnu.org ---
I guess I should take another look here. Seems I found some useful patchlets
back in the day. Hope they still work ...
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Subject: [Bug preprocessor/86079] preprocessor fails to splice lines
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--- Comment #5 from Andreas Schwab <schwab@linux-m68k.org> ---
It's not plain C since the stray backslashes are invalid.
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Subject: [Bug fortran/49213] [OOP] gfortran rejects structure constructor expression
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--- Comment #29 from janus at gcc dot gnu.org ---
Another very related test case:
program p
type tContainer
class(*), allocatable :: x
end type
integer, parameter :: i = 0
type(tContainer) :: cont
! compiler error: Can't convert INTEGER(4) to CLASS(*)
cont = tContainer(i)
! linker error: undefined reference to `__copy_INTEGER_4_.3804'
cont%x = i
end
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Subject: [Bug preprocessor/86079] preprocessor fails to splice lines
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--- Comment #6 from Andreas Schwab <schwab@linux-m68k.org> ---
In C mode, with line numbers, the newlines are required to preserve the line
number of the tokens.
>From gcc-bugs-return-606690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 09:46:26 2018
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--- Comment #7 from jbeulich at novell dot com ---
(In reply to Andreas Schwab from comment #5)
> It's not plain C since the stray backslashes are invalid.
As said - try with the stray ones removed, i.e.
unsigned \
int \
u \
;
This _is_ valid C from all I know, and pre-processes to
unsigned
int
u
;
instead of
unsigned int u ;
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Subject: [Bug preprocessor/86079] preprocessor fails to splice lines
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--- Comment #8 from jbeulich at novell dot com ---
(In reply to Andreas Schwab from comment #6)
> In C mode, with line numbers, the newlines are required to preserve the line
> number of the tokens.
I don't think preserving line numbers is more important than conforming to the
standard.
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Subject: [Bug preprocessor/86079] preprocessor fails to splice lines
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--- Comment #9 from Andreas Schwab <schwab@linux-m68k.org> ---
There is no conformance bug because the standard does not specify a textual
representation of the preprocessor phases. Also, your input is INVALID C
anyway.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86079
Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #10 from Andreas Schwab <schwab@linux-m68k.org> ---
Also, please read footnote 6 in 5.1.1.2. There is no requirement that the
translation phases correspondent to any part of what the implementation
actually does.
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Subject: [Bug tree-optimization/85588] [6/7 Regression] -fwrapv miscompilation
Date: Thu, 07 Jun 2018 10:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85588
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 7 10:10:00 2018
New Revision: 261269
URL: https://gcc.gnu.org/viewcvs?rev=261269&root=gcc&view=rev
Log:
2018-06-07 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-05-04 Richard Biener <rguenther@suse.de>
PR middle-end/85588
* fold-const.c (negate_expr_p): Restrict negation of operand
zero of a division to when we know that can happen without
overflow.
(fold_negate_expr_1): Likewise.
* gcc.dg/torture/pr85588.c: New testcase.
* gcc.dg/torture/pr57656.c: Use dg-additional-options.
2018-05-02 Richard Biener <rguenther@suse.de>
PR middle-end/85567
* gimplify.c (gimplify_save_expr): When in SSA form allow
SAVE_EXPRs to compute to SSA vars.
* gcc.dg/torture/pr85567.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/85597
* tree-vect-stmts.c (vectorizable_operation): For ternary SLP
do not use split vect_get_vec_defs call but call vect_get_slp_defs
directly.
* gcc.dg/vect/pr85597.c: New testcase.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr85567.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr85588.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/vect/pr85597.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/fold-const.c
branches/gcc-7-branch/gcc/gimplify.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr57656.c
branches/gcc-7-branch/gcc/tree-vect-stmts.c
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Subject: [Bug tree-optimization/85597] [6/7 Regression] internal compiler error: in compute_live_loop_exits, at tree-ssa-loop-manip.c:229
Date: Thu, 07 Jun 2018 10:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85597
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 7 10:10:00 2018
New Revision: 261269
URL: https://gcc.gnu.org/viewcvs?rev=261269&root=gcc&view=rev
Log:
2018-06-07 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-05-04 Richard Biener <rguenther@suse.de>
PR middle-end/85588
* fold-const.c (negate_expr_p): Restrict negation of operand
zero of a division to when we know that can happen without
overflow.
(fold_negate_expr_1): Likewise.
* gcc.dg/torture/pr85588.c: New testcase.
* gcc.dg/torture/pr57656.c: Use dg-additional-options.
2018-05-02 Richard Biener <rguenther@suse.de>
PR middle-end/85567
* gimplify.c (gimplify_save_expr): When in SSA form allow
SAVE_EXPRs to compute to SSA vars.
* gcc.dg/torture/pr85567.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/85597
* tree-vect-stmts.c (vectorizable_operation): For ternary SLP
do not use split vect_get_vec_defs call but call vect_get_slp_defs
directly.
* gcc.dg/vect/pr85597.c: New testcase.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr85567.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr85588.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/vect/pr85597.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/fold-const.c
branches/gcc-7-branch/gcc/gimplify.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr57656.c
branches/gcc-7-branch/gcc/tree-vect-stmts.c
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Subject: [Bug middle-end/85567] [7 Regression] internal compiler error: in gimplify_modify_expr, at gimplify.c:5797 when using sincos()
Date: Thu, 07 Jun 2018 10:10:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 7 10:10:00 2018
New Revision: 261269
URL: https://gcc.gnu.org/viewcvs?rev=261269&root=gcc&view=rev
Log:
2018-06-07 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-05-04 Richard Biener <rguenther@suse.de>
PR middle-end/85588
* fold-const.c (negate_expr_p): Restrict negation of operand
zero of a division to when we know that can happen without
overflow.
(fold_negate_expr_1): Likewise.
* gcc.dg/torture/pr85588.c: New testcase.
* gcc.dg/torture/pr57656.c: Use dg-additional-options.
2018-05-02 Richard Biener <rguenther@suse.de>
PR middle-end/85567
* gimplify.c (gimplify_save_expr): When in SSA form allow
SAVE_EXPRs to compute to SSA vars.
* gcc.dg/torture/pr85567.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/85597
* tree-vect-stmts.c (vectorizable_operation): For ternary SLP
do not use split vect_get_vec_defs call but call vect_get_slp_defs
directly.
* gcc.dg/vect/pr85597.c: New testcase.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr85567.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr85588.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/vect/pr85597.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/fold-const.c
branches/gcc-7-branch/gcc/gimplify.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr57656.c
branches/gcc-7-branch/gcc/tree-vect-stmts.c
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From: "vinibali1 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86080] New: Using FLTO ends up in huge package size (jansson zeromq zlib)
Date: Thu, 07 Jun 2018 10:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86080
Bug ID: 86080
Summary: Using FLTO ends up in huge package size (jansson
zeromq zlib)
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: vinibali1 at gmail dot com
Target Milestone: ---
Created attachment 44243
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44243&action=edit
jansson.7z
Hello there!
I used to play with the compiler options of GCC. These days I was recompiling
the packages of my machine using the PKGBUILD files provided by the Arch
community and I just found a few packages became bigger when using the flto=4
parameter.
0s 0s flto 02 02 flto
jansson 142,00 KiB 419,00 KiB 163,00 KiB 433,00 KiB
zeromq 2,15 MiB 8,04 MiB 2,46 MiB 7,30 MiB
zlib 293,00 KiB 717,00 KiB 327,00 KiB 752,00 KiB
For compiled packages and screenshots please look at the attachment.
AMD AthlonII X4 605e
Linux 4.16.13-2-zen
gcc 8.1.1+20180531-1
CFLAGS="-march=x86-64 -mtune=generic -[0s,O2] [-flto=4,] -pipe
-fstack-protector-strong -fno-plt"
PKGBUILDs
https://git.archlinux.org/svntogit/community.git/tree/trunk/PKGBUILD?h=packages/jansson
https://git.archlinux.org/svntogit/community.git/tree/trunk/PKGBUILD?h=packages/zeromq
https://git.archlinux.org/svntogit/packages.git/tree/trunk/PKGBUILD?h=packages/zlib
Thank you
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Subject: [Bug c/86080] Using FLTO ends up in huge package size (jansson zeromq zlib)
Date: Thu, 07 Jun 2018 10:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86080
--- Comment #1 from Balazs Vinarz <vinibali1 at gmail dot com> ---
Created attachment 44244
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44244&action=edit
zlib.7z
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From: "vinibali1 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86080] Using FLTO ends up in huge package size (jansson zeromq zlib)
Date: Thu, 07 Jun 2018 10:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86080
--- Comment #3 from Balazs Vinarz <vinibali1 at gmail dot com> ---
Created attachment 44246
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44246&action=edit
zeromq.png
>From gcc-bugs-return-606699-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 10:21:30 2018
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Subject: [Bug c/86080] Using FLTO ends up in huge package size (jansson zeromq zlib)
Date: Thu, 07 Jun 2018 10:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86080
--- Comment #2 from Balazs Vinarz <vinibali1 at gmail dot com> ---
Created attachment 44245
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44245&action=edit
jansson.png
>From gcc-bugs-return-606701-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 10:22:00 2018
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From: "vinibali1 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86080] Using FLTO ends up in huge package size (jansson zeromq zlib)
Date: Thu, 07 Jun 2018 10:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86080
--- Comment #4 from Balazs Vinarz <vinibali1 at gmail dot com> ---
Created attachment 44247
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44247&action=edit
zlib.png
>From gcc-bugs-return-606703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 10:23:37 2018
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From: "vinibali1 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86080] Using FLTO ends up in huge package size (jansson zeromq zlib)
Date: Thu, 07 Jun 2018 10:23:00 -0000
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--- Comment #5 from Balazs Vinarz <vinibali1 at gmail dot com> ---
Link for the zeromq.7z:
https://drive.google.com/open?id=15GwJ8EnlxYzFUHtzf30mf4gxqC74l1p6
>From gcc-bugs-return-606702-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 10:23:01 2018
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86072] Poor codegen with atomics
Date: Thu, 07 Jun 2018 10:23:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
As for the segfault mentioned in comment 0, this is not a compiler bug: it's
the assembler segfaulting, and it segfaults even with an empty source, so it's
probably an issue/misconfiguration on the godbolt.org side.
>From gcc-bugs-return-606704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 10:40:26 2018
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From: "ptdrnvqd at 10mail dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug pending/86081] New: expecting integer value - internal compiler error: Aborted
Date: Thu, 07 Jun 2018 10:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86081
Bug ID: 86081
Summary: expecting integer value - internal compiler error:
Aborted
Product: gcc
Version: 5.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: pending
Assignee: unassigned at gcc dot gnu.org
Reporter: ptdrnvqd at 10mail dot org
Target Milestone: ---
Created attachment 44248
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44248&action=edit
preprocessed file (*.i*) , -save-temps
not into programming enough to know what happened
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
5.5.0-12ubuntu1~16.04' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.5.0 20171010 (Ubuntu 5.5.0-12ubuntu1~16.04)
command:
(cd
/home/lmint-sgt2_usrnam-01/.cache/bazel/_bazel_lmint-sgt2_usrnam-01/4b7ce482992596b3314a677549b0daa3/execroot/org_tensorflow
&& \
> exec env - \
> ANDROID_BUILD_TOOLS_VERSION=28.0.0 \
> ANDROID_NDK_API_LEVEL=17 \
> ANDROID_NDK_HOME=/home/lmint-sgt2_usrnam-01/Android/Sdk/ndk-bundle \
> ANDROID_SDK_API_LEVEL=27 \
> ANDROID_SDK_HOME=/home/lmint-sgt2_usrnam-01/Android/Sdk \
> COMPUTECPP_TOOLKIT_PATH=/home/lmint-sgt2_usrnam-01/Downloads/programs/ComputeCpp-CE-0.8.0-Ubuntu-16.04-x86_64 \
> HOST_CXX_COMPILER=/usr/bin/g++ \
> HOST_C_COMPILER=/usr/bin/gcc \
> PATH=/home/lmint-sgt2_usrnam-01/.nix-profile/bin:/home/lmint-sgt2_usrnam-01/.cargo/bin:/opt/OpenPrinting-Gutenprint/sbin:/opt/OpenPrinting-Gutenprint/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin \
> PWD=/proc/self/cwd \
> PYTHON_BIN_PATH=/usr/bin/python3 \
> PYTHON_LIB_PATH=/usr/local/lib/python3.5/dist-packages \
> TF_DOWNLOAD_CLANG=0 \
> TF_NEED_COMPUTECPP=1 \
> TF_NEED_CUDA=0 \
> TF_NEED_OPENCL_SYCL=1 \
> /usr/bin/gcc -U_FORTIFY_SOURCE -v -save-temps -fstack-protector -Wall -B/usr/bin -B/usr/bin -Wunused-but-set-parameter -Wno-free-nonheap-object -fno-omit-frame-pointer -g0 -O2 -D_FORTIFY_SOURCE=1 -DNDEBUG -ffunction-sections -fdata-sections -MD -MF bazel-out/k8-opt/bin/external/gif_archive/_objs/gif/external/gif_archive/lib/gif_font.pic.d -fPIC -iquote external/gif_archive -iquote bazel-out/k8-opt/genfiles/external/gif_archive -iquote external/bazel_tools -iquote bazel-out/k8-opt/genfiles/external/bazel_tools -isystem external/gif_archive/lib -isystem bazel-out/k8-opt/genfiles/external/gif_archive/lib -isystem bazel-out/k8-opt/bin/external/gif_archive/lib -ffunction-sections -fdata-sections -Wl,--gc-sections -O3 -mtune=native -march=native -m64 -maccumulate-outgoing-args -m8bit-idiv -minline-stringops-dynamically -fipa-pta -fgraphite-identity -ftree-loop-distribution -fvariable-expansion-in-unroller -freorder-blocks-and-partition -fgcse-sm -fgcse-las -fgcse-after-reload --param omega-eliminate-redundant-constraints=1 -floop-interchange -floop-strip-mine -floop-block -floop-nest-optimize -pipe -g0 -s -Wl,-z,relro,-z,now -ftree-vectorize -v -Wl,-O1 -Wl,--relax -ffunction-sections -fdata-sections -Wl,--gc-sections -O3 -mtune=native -march=native -m64 -maccumulate-outgoing-args -m8bit-idiv -minline-stringops-dynamically -fipa-pta -fgraphite-identity -ftree-loop-distribution -fvariable-expansion-in-unroller -freorder-blocks-and-partition -fgcse-sm -fgcse-las -fgcse-after-reload -floop-nest-optimize -pipe -g0 -s -Wl,-z,relro,-z,now -ftree-vectorize -v -fno-canonical-system-headers -Wno-builtin-macro-redefined -D__DATE__="redacted" -D__TIMESTAMP__="redacted" -D__TIME__="redacted" -c external/gif_archive/lib/gif_font.c -o bazel-out/k8-opt/bin/external/gif_archive/_objs/gif/external/gif_archive/lib/gif_font.pic.o)
output:
gcc: warning: -pipe ignored because -save-temps specified
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
5.5.0-12ubuntu1~16.04' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.5.0 20171010 (Ubuntu 5.5.0-12ubuntu1~16.04)
COLLECT_GCC_OPTIONS='-U' '_FORTIFY_SOURCE' '-v' '-save-temps'
'-fstack-protector' '-Wall' '-B' '/usr/bin' '-B' '/usr/bin'
'-Wunused-but-set-parameter' '-Wno-free-nonheap-object'
'-fno-omit-frame-pointer' '-g0' '-O2' '-D' '_FORTIFY_SOURCE=1' '-D' 'NDEBUG'
'-MD' '-MF'
'bazel-out/k8-opt/bin/external/gif_archive/_objs/gif/external/gif_archive/lib/gif_font.pic.d'
'-fPIC' '-iquote' 'external/gif_archive' '-iquote'
'bazel-out/k8-opt/genfiles/external/gif_archive' '-iquote'
'external/bazel_tools' '-iquote'
'bazel-out/k8-opt/genfiles/external/bazel_tools' '-isystem'
'external/gif_archive/lib' '-isystem'
'bazel-out/k8-opt/genfiles/external/gif_archive/lib' '-isystem'
'bazel-out/k8-opt/bin/external/gif_archive/lib' '-O3' '-mtune=native'
'-march=native' '--param' 'omega-eliminate-redundant-constraints=1'
'-floop-interchange' '-floop-strip-mine' '-floop-block' '-pipe' '-g0' '-s' '-v'
'-ffunction-sections' '-fdata-sections' '-O3' '-mtune=native' '-march=native'
'-m64' '-maccumulate-outgoing-args' '-m8bit-idiv'
'-minline-stringops-dynamically' '-fipa-pta' '-fgraphite-identity'
'-ftree-loop-distribution' '-fvariable-expansion-in-unroller'
'-freorder-blocks-and-partition' '-fgcse-sm' '-fgcse-las' '-fgcse-after-reload'
'-floop-nest-optimize' '-pipe' '-g0' '-s' '-ftree-vectorize' '-v'
'-fno-canonical-system-headers' '-Wno-builtin-macro-redefined' '-D'
'__DATE__=redacted' '-D' '__TIMESTAMP__=redacted' '-D' '__TIME__=redacted' '-c'
'-o'
'bazel-out/k8-opt/bin/external/gif_archive/_objs/gif/external/gif_archive/lib/gif_font.pic.o'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1 -E -quiet -v -v -v -imultiarch
x86_64-linux-gnu -MD
bazel-out/k8-opt/bin/external/gif_archive/_objs/gif/external/gif_archive/lib/gif_font.pic.d
-MF
bazel-out/k8-opt/bin/external/gif_archive/_objs/gif/external/gif_archive/lib/gif_font.pic.d
-MQ
bazel-out/k8-opt/bin/external/gif_archive/_objs/gif/external/gif_archive/lib/gif_font.pic.o
-U _FORTIFY_SOURCE -D _FORTIFY_SOURCE=1 -D NDEBUG -D __DATE__=redacted -D
__TIMESTAMP__=redacted -D __TIME__=redacted -iquote external/gif_archive
-iquote bazel-out/k8-opt/genfiles/external/gif_archive -iquote
external/bazel_tools -iquote bazel-out/k8-opt/genfiles/external/bazel_tools
-isystem external/gif_archive/lib -isystem
bazel-out/k8-opt/genfiles/external/gif_archive/lib -isystem
bazel-out/k8-opt/bin/external/gif_archive/lib
external/gif_archive/lib/gif_font.c -march=haswell -mmmx -mno-3dnow -msse
-msse2 -msse3 -mssse3 -mno-sse4a -mcx16 -msahf -mmovbe -maes -mno-sha -mpclmul
-mpopcnt -mabm -mno-lwp -mfma -mno-fma4 -mno-xop -mbmi -mbmi2 -mno-tbm -mavx
-mavx2 -msse4.2 -msse4.1 -mlzcnt -mno-rtm -mno-hle -mrdrnd -mf16c -mfsgsbase
-mno-rdseed -mno-prfchw -mno-adx -mfxsr -mxsave -mxsaveopt -mno-avx512f
-mno-avx512er -mno-avx512cd -mno-avx512pf -mno-prefetchwt1 -mno-clflushopt
-mno-xsavec -mno-xsaves -mno-avx512dq -mno-avx512bw -mno-avx512vl
-mno-avx512ifma -mno-avx512vbmi -mno-clwb -mno-mwaitx --param l1-cache-size=32
--param l1-cache-line-size=64 --param l2-cache-size=8192 -mtune=haswell -m64
-maccumulate-outgoing-args -m8bit-idiv -minline-stringops-dynamically -Wall
-Wunused-but-set-parameter -Wno-free-nonheap-object
-Wno-builtin-macro-redefined -fstack-protector -fno-omit-frame-pointer -fPIC
-floop-interchange -floop-strip-mine -floop-block -ffunction-sections
-fdata-sections -fipa-pta -fgraphite-identity -ftree-loop-distribution
-fvariable-expansion-in-unroller -freorder-blocks-and-partition -fgcse-sm
-fgcse-las -fgcse-after-reload -floop-nest-optimize -ftree-vectorize
-fno-canonical-system-headers -O2 -O3 -O3 -fpch-preprocess -Wformat-security -o
gif_font.i
ignoring nonexistent directory
"bazel-out/k8-opt/genfiles/external/gif_archive/lib"
ignoring nonexistent directory "bazel-out/k8-opt/bin/external/gif_archive/lib"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/5/../../../../x86_64-linux-gnu/include"
ignoring nonexistent directory "bazel-out/k8-opt/genfiles/external/gif_archive"
ignoring nonexistent directory "bazel-out/k8-opt/genfiles/external/bazel_tools"
#include "..." search starts here:
external/gif_archive
external/bazel_tools
#include <...> search starts here:
external/gif_archive/lib
/usr/lib/gcc/x86_64-linux-gnu/5/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-U' '_FORTIFY_SOURCE' '-v' '-save-temps'
'-fstack-protector' '-Wall' '-B' '/usr/bin' '-B' '/usr/bin'
'-Wunused-but-set-parameter' '-Wno-free-nonheap-object'
'-fno-omit-frame-pointer' '-g0' '-O2' '-D' '_FORTIFY_SOURCE=1' '-D' 'NDEBUG'
'-MD' '-MF'
'bazel-out/k8-opt/bin/external/gif_archive/_objs/gif/external/gif_archive/lib/gif_font.pic.d'
'-fPIC' '-iquote' 'external/gif_archive' '-iquote'
'bazel-out/k8-opt/genfiles/external/gif_archive' '-iquote'
'external/bazel_tools' '-iquote'
'bazel-out/k8-opt/genfiles/external/bazel_tools' '-isystem'
'external/gif_archive/lib' '-isystem'
'bazel-out/k8-opt/genfiles/external/gif_archive/lib' '-isystem'
'bazel-out/k8-opt/bin/external/gif_archive/lib' '-O3' '-mtune=native'
'-march=native' '--param' 'omega-eliminate-redundant-constraints=1'
'-floop-interchange' '-floop-strip-mine' '-floop-block' '-pipe' '-g0' '-s' '-v'
'-ffunction-sections' '-fdata-sections' '-O3' '-mtune=native' '-march=native'
'-m64' '-maccumulate-outgoing-args' '-m8bit-idiv'
'-minline-stringops-dynamically' '-fipa-pta' '-fgraphite-identity'
'-ftree-loop-distribution' '-fvariable-expansion-in-unroller'
'-freorder-blocks-and-partition' '-fgcse-sm' '-fgcse-las' '-fgcse-after-reload'
'-floop-nest-optimize' '-pipe' '-g0' '-s' '-ftree-vectorize' '-v'
'-fno-canonical-system-headers' '-Wno-builtin-macro-redefined' '-D'
'__DATE__=redacted' '-D' '__TIMESTAMP__=redacted' '-D' '__TIME__=redacted' '-c'
'-o'
'bazel-out/k8-opt/bin/external/gif_archive/_objs/gif/external/gif_archive/lib/gif_font.pic.o'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1 -fpreprocessed gif_font.i -march=haswell
-mmmx -mno-3dnow -msse -msse2 -msse3 -mssse3 -mno-sse4a -mcx16 -msahf -mmovbe
-maes -mno-sha -mpclmul -mpopcnt -mabm -mno-lwp -mfma -mno-fma4 -mno-xop -mbmi
-mbmi2 -mno-tbm -mavx -mavx2 -msse4.2 -msse4.1 -mlzcnt -mno-rtm -mno-hle
-mrdrnd -mf16c -mfsgsbase -mno-rdseed -mno-prfchw -mno-adx -mfxsr -mxsave
-mxsaveopt -mno-avx512f -mno-avx512er -mno-avx512cd -mno-avx512pf
-mno-prefetchwt1 -mno-clflushopt -mno-xsavec -mno-xsaves -mno-avx512dq
-mno-avx512bw -mno-avx512vl -mno-avx512ifma -mno-avx512vbmi -mno-clwb
-mno-mwaitx --param l1-cache-size=32 --param l1-cache-line-size=64 --param
l2-cache-size=8192 -mtune=haswell -quiet -dumpbase gif_font.c -m64
-maccumulate-outgoing-args -m8bit-idiv -minline-stringops-dynamically
-auxbase-strip
bazel-out/k8-opt/bin/external/gif_archive/_objs/gif/external/gif_archive/lib/gif_font.pic.o
-g0 -g0 -g0 -O2 -O3 -O3 -Wall -Wunused-but-set-parameter
-Wno-free-nonheap-object -Wno-builtin-macro-redefined -version
-fstack-protector -fno-omit-frame-pointer -fPIC -floop-interchange
-floop-strip-mine -floop-block -ffunction-sections -fdata-sections -fipa-pta
-fgraphite-identity -ftree-loop-distribution -fvariable-expansion-in-unroller
-freorder-blocks-and-partition -fgcse-sm -fgcse-las -fgcse-after-reload
-floop-nest-optimize -ftree-vectorize -fno-canonical-system-headers --param
omega-eliminate-redundant-constraints=1 -Wformat-security -o gif_font.s
GNU C11 (Ubuntu 5.5.0-12ubuntu1~16.04) version 5.5.0 20171010
(x86_64-linux-gnu)
compiled by GNU C version 5.5.0 20171010, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (Ubuntu 5.5.0-12ubuntu1~16.04) version 5.5.0 20171010
(x86_64-linux-gnu)
compiled by GNU C version 5.5.0 20171010, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: a17d0cd9aea7093f02a2e3f3b1a39337
isl_constraint.c:627: expecting integer value
external/gif_archive/lib/gif_font.c: In function 'GifDrawBox':
external/gif_archive/lib/gif_font.c:177:1: internal compiler error: Aborted
GifDrawBox(SavedImage *Image,
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
>From gcc-bugs-return-606705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 10:43:12 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86080] Using FLTO ends up in huge package size (jansson zeromq zlib)
Date: Thu, 07 Jun 2018 10:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86080
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
The packages contain static archives. In that case those, when compiled with
-flto, will contain LTO bytecode and not object code.
You want to make sure to use -fno-lto on static archive builds.
>From gcc-bugs-return-606706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 10:46:54 2018
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Subject: [Bug pending/86081] expecting integer value - internal compiler error: Aborted
Date: Thu, 07 Jun 2018 10:46:00 -0000
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--- Comment #1 from ptdrnvqd at 10mail dot org ---
either might be a factor:
-floop-interchange -floop-strip-mine -floop-block
>From gcc-bugs-return-606707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 10:49:21 2018
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Subject: [Bug pending/86081] expecting integer value - internal compiler error: Aborted
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Known to work| |6.1.0
Resolution|--- |FIXED
Known to fail| |5.5.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
This has been fixed in GCC 6. A workaround is to not use -floop-block. Note
that GCC 5 is no longer maintained.
>From gcc-bugs-return-606708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 11:26:23 2018
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From: "pffang at vip dot qq.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/85684] output of instrinsic _xgetbv is wrongly overwritten
Date: Thu, 07 Jun 2018 11:26:00 -0000
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Fang Pengfei <pffang at vip dot qq.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pffang at vip dot qq.com
--- Comment #1 from Fang Pengfei <pffang at vip dot qq.com> ---
Yes, I found the same problem.
The function _xgetbv cann't produce correct machine code when optimization on.
>From gcc-bugs-return-606709-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 11:57:35 2018
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Subject: [Bug sanitizer/84761] AddressSanitizer is not compatible with glibc 2.27 on x86
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 7 11:56:25 2018
New Revision: 261272
URL: https://gcc.gnu.org/viewcvs?rev=261272&root=gcc&view=rev
Log:
2018-06-07 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-03-19 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/84761
* sanitizer_common/sanitizer_linux_libcdep.cc (__GLIBC_PREREQ):
Define if not defined.
(DL_INTERNAL_FUNCTION): Don't define.
(InitTlsSize): For __i386__ if not compiled against glibc 2.27+
determine at runtime whether to use regparm(3), stdcall calling
convention for older glibcs or normal calling convention for
newer glibcs for call to _dl_get_tls_static_info.
Modified:
branches/gcc-7-branch/libsanitizer/ChangeLog
branches/gcc-7-branch/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc
>From gcc-bugs-return-606710-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 11:58:37 2018
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Subject: [Bug sanitizer/84761] AddressSanitizer is not compatible with glibc 2.27 on x86
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.3.1, 8.1.0
Known to fail| |7.3.0
--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on the GCC 7 branch as well.
>From gcc-bugs-return-606711-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 12:01:06 2018
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Subject: [Bug middle-end/85567] [7 Regression] internal compiler error: in gimplify_modify_expr, at gimplify.c:5797 when using sincos()
Date: Thu, 07 Jun 2018 12:00:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |7.3.1
Resolution|--- |FIXED
Known to fail| |7.3.0
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-606712-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 12:16:51 2018
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Subject: [Bug target/85684] output of instrinsic _xgetbv is wrongly overwritten
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |uros at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This has been fixed with r260135 on the trunk.
https://gcc.gnu.org/ml/gcc-patches/2018-05/msg00515.html
Uros, are you going to backport at least the _xgetbv fix?
>From gcc-bugs-return-606713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 12:18:53 2018
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Subject: [Bug target/85684] output of instrinsic _xgetbv is wrongly overwritten
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #2)
> This has been fixed with r260135 on the trunk.
> https://gcc.gnu.org/ml/gcc-patches/2018-05/msg00515.html
> Uros, are you going to backport at least the _xgetbv fix?
Uh, yes - it looks I forgot to commit the backport.
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Subject: [Bug c++/86068] __cpp_transactional_memory is 210500
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--- Comment #2 from Rasmus Villemoes <rv at rasmusvillemoes dot dk> ---
The page https://gcc.gnu.org/projects/cxx-status.html probably needs to be
updated to say __cpp_transactional_memory >= 201500.
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Subject: [Bug debug/84342] Location views breaks cross builds of arm including gnueabihf
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
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--- Comment #11 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #10)
> GCC 8.1 has been released.
(In reply to Jeffrey A. Law from comment #9)
> Alex: I realize that's the point of the hook. But I'm pretty sure there's
> no way to fix the ARM port given the point at which lengths are set and the
> point at which ccfsm is valid are at two different times. We'd either need
> a revamp of ccfsm or some layering violations to allow dwarf2out to access
> the underlying routines for length query and bypass the cache.
>
> It's my view this BZ is resolved. But if you want to keep it open to track
> the incorrect lengths in the ARM port, that's fine. But it's certainly no
> longer a regression for gcc-8.
In which case should this still retain the P1 status ?
The builds are ok since Alex's patch and we need to look at this at some point
of time.
Richard E and I have been talking about whether ccfsm actually makes sense in
2018 and whether we should just rip it out anyway and make sure that the rtl
optimizers get it right rather than carry this in the far future. It's only
used in A32 state, it's probably not got a huge amount going for it and maybe
we should just rip it out.
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Subject: [Bug target/63177] Powerpc no-vfa-vect-depend-2.c and no-vfa-vect-depend-3.c failures
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--- Comment #12 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Thu Jun 7 13:59:37 2018
New Revision: 261275
URL: https://gcc.gnu.org/viewcvs?rev=261275&root=gcc&view=rev
Log:
Backport from mainline
2018-06-06 Peter Bergner <bergner@vnet.ibm.com>
PR target/63177
* /config/rs6000/rs6000.h (ASM_CPU_SPEC): Add support for -mpower9.
Don't handle -mcpu=power8 if -mpower9-vector is also used.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/rs6000/rs6000.h
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Subject: [Bug target/63177] Powerpc no-vfa-vect-depend-2.c and no-vfa-vect-depend-3.c failures
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--- Comment #13 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Thu Jun 7 14:01:57 2018
New Revision: 261276
URL: https://gcc.gnu.org/viewcvs?rev=261276&root=gcc&view=rev
Log:
Backport from mainline
2018-06-06 Peter Bergner <bergner@vnet.ibm.com>
PR target/63177
* /config/rs6000/rs6000.h (ASM_CPU_SPEC): Add support for -mpower9.
Don't handle -mcpu=power8 if -mpower9-vector is also used.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/rs6000/rs6000.h
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Subject: [Bug c/85318] -Wc90-c99-compat does not warn about for loop initial declarations
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #14 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Thu Jun 7 14:03:35 2018
New Revision: 261277
URL: https://gcc.gnu.org/viewcvs?rev=261277&root=gcc&view=rev
Log:
Backport from mainline
2018-06-06 Peter Bergner <bergner@vnet.ibm.com>
PR target/63177
* /config/rs6000/rs6000.h (ASM_CPU_SPEC): Add support for -mpower9.
Don't handle -mcpu=power8 if -mpower9-vector is also used.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/rs6000/rs6000.h
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Subject: [Bug fortran/85536] ICE on procedure pointer assignment for subroutine with procedure pointer argument
Date: Thu, 07 Jun 2018 14:16:00 -0000
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--- Comment #2 from Tiziano Müller <dev-zero at gentoo dot org> ---
Ok, I got around to generate a backtrace from gfortran:
[...]
Starting program: /home/tiziano/tmp/gfortran/gcc/f951 ice_minimal_rep.f90
-quiet -dumpbase ice_minimal_rep.f90 -mtune=generic -march=x86-64 -auxbase
ice_minimal_rep -fintrinsic-modules-path finclude -o /tmp/ccQdv1nJ.s
Program received signal SIGSEGV, Segmentation fault.
0x0000000000844729 in compare_type (s1=0x2d78570, s2=0x2d78570) at
../../gcc/gcc/fortran/interface.c:744
744 return gfc_compare_types (&s1->ts, &s2->ts) || s2->ts.type ==
BT_ASSUMED;
(gdb) bt
#0 0x0000000000844729 in compare_type (s1=0x2d78570, s2=0x2d78570) at
../../gcc/gcc/fortran/interface.c:744
#1 0x00000000008457e3 in gfc_check_dummy_characteristics (s1=0x2d78570,
s2=0x2d78570, type_must_agree=true, errmsg=0x7ffffbfff210 "", err_len=200)
at ../../gcc/gcc/fortran/interface.c:1294
#2 0x0000000000846b91 in gfc_compare_interfaces (s1=0x2d78570, s2=0x2d78570,
name2=0x7ffff6fe4370 "nextparser", generic_flag=0, strict_flag=1,
errmsg=0x7ffffbfff210 "", err_len=200, p1=0x0, p2=0x0) at
../../gcc/gcc/fortran/interface.c:1755
#3 0x0000000000845cb3 in gfc_check_dummy_characteristics (s1=0x2d78570,
s2=0x2d78570, type_must_agree=true, errmsg=0x7ffffbfff3c0 "", err_len=200)
at ../../gcc/gcc/fortran/interface.c:1384
#4 0x0000000000846b91 in gfc_compare_interfaces (s1=0x2d78570, s2=0x2d78570,
name2=0x7ffff6fe4370 "nextparser", generic_flag=0, strict_flag=1,
errmsg=0x7ffffbfff3c0 "", err_len=200, p1=0x0, p2=0x0) at
../../gcc/gcc/fortran/interface.c:1755
#5 0x0000000000845cb3 in gfc_check_dummy_characteristics (s1=0x2d78570,
s2=0x2d78570, type_must_agree=true, errmsg=0x7ffffbfff570 "", err_len=200)
at ../../gcc/gcc/fortran/interface.c:1384
#6 0x0000000000846b91 in gfc_compare_interfaces (s1=0x2d78570, s2=0x2d78570,
name2=0x7ffff6fe4370 "nextparser", generic_flag=0, strict_flag=1,
errmsg=0x7ffffbfff570 "", err_len=200, p1=0x0, p2=0x0) at
../../gcc/gcc/fortran/interface.c:1755
#7 0x0000000000845cb3 in gfc_check_dummy_characteristics (s1=0x2d78570,
s2=0x2d78570, type_must_agree=true, errmsg=0x7ffffbfff720 "", err_len=200)
at ../../gcc/gcc/fortran/interface.c:1384
#8 0x0000000000846b91 in gfc_compare_interfaces (s1=0x2d78570, s2=0x2d78570,
name2=0x7ffff6fe4370 "nextparser", generic_flag=0, strict_flag=1,
errmsg=0x7ffffbfff720 "", err_len=200, p1=0x0, p2=0x0) at
../../gcc/gcc/fortran/interface.c:1755
#9 0x0000000000845cb3 in gfc_check_dummy_characteristics (s1=0x2d78570,
s2=0x2d78570, type_must_agree=true, errmsg=0x7ffffbfff8d0 "", err_len=200)
at ../../gcc/gcc/fortran/interface.c:1384
[...]
which seems to be an endless loop between gfc_check_dummy_characteristics and
gfc_compare_interfaces.
What I find interesting is the fact that ifort (18.0.2) chokes the same way on
the same example:
$ ifort -o ice_minimal_rep ice_minimal_rep.f90
ice_minimal_rep.f90(19): internal error: Please visit
'http://www.intel.com/software/products/support' for assistance.
end program
^
[ Aborting due to internal error. ]
compilation aborted for ice_minimal_rep.f90 (code 1)
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Subject: [Bug target/63177] Powerpc no-vfa-vect-depend-2.c and no-vfa-vect-depend-3.c failures
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Peter Bergner <bergner at gcc dot gnu.org> changed:
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--- Comment #15 from Peter Bergner <bergner at gcc dot gnu.org> ---
Fixed everywhere.
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Subject: [Bug target/85755] PowerPC Gcc's -mupdate produces inefficient code on power8/power9 machines
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--- Comment #5 from Peter Bergner <bergner at gcc dot gnu.org> ---
Hmmm, it must be the extra use of rs6000_offsettable_memref_p() that disables
the update forms. I'll have a look.
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Subject: [Bug c++/85577] list-initialization chooses initializer-list constructor
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #2)
> Can the testcase be turned into a runtime test? I couldn't figure it out
> (how to construct A).
The point of the test is that GCC calls the vector(initializer_list<T>)
constructor (which I deleted so that we get an error if it's used, i.e. it
wasn't meant to be a runtime test, just compile-time).
I thought that v{std::move(v)} should have called the vector move constructor,
but actually https://wg21.link/cwg2137 says that GCC is right here (and Clang
and EDG don't implement that DR yet, in Clang's case because it was found to
create other problems).
But GCC seems to be doing the right thing here.
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Subject: [Bug c++/86082] New: user-defined literals are not converted to the execution charset
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Bug ID: 86082
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template <char... p> void q();
template <> void q<'1','2','3'>() {}
template <char... p> void operator""_test() { q<p...> (); }
int
main ()
{
123_test;
}
builds fine with 'g++ t.cpp'
but triggers a link error compiled with 'g++ t.cpp -fexec-charset=IBM1047'
In the specialization of q the string literals '1', '2', '3' get converted to
the target character set as expected. However, the call generated in the body
of the operator does still use the source character set:
10: 0000000000000000 2 FUNC GLOBAL DEFAULT 2 void q<(char)-15,
(char)-14, (char)-13>()
11: 0000000000000002 16 FUNC GLOBAL DEFAULT 2 main
12: 0000000000000000 12 FUNC WEAK DEFAULT 6 void operator""
_test<(char)49, (char)50, (char)51>()
13: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND void q<(char)49,
(char)50, (char)51>()
When converting a user-defined literal into string literals also a conversion
into the execution charset is required.
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Andreas Krebbel <krebbel at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target| |x86_64
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fails at least since r228905
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00403.html
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Subject: [Bug tree-optimization/86043] strlen after memcpy partially overwriting a string not optimized
Date: Thu, 07 Jun 2018 15:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86043
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-07
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00403.html
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Subject: [Bug target/85684] output of instrinsic _xgetbv is wrongly overwritten
Date: Thu, 07 Jun 2018 16:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85684
--- Comment #4 from uros at gcc dot gnu.org ---
Author: uros
Date: Thu Jun 7 16:37:01 2018
New Revision: 261283
URL: https://gcc.gnu.org/viewcvs?rev=261283&root=gcc&view=rev
Log:
PR target/85684
* config/i386/i386.c (ix86_expand_builtin) <case IX86_BUILTIN_RDPID>:
Generate SImode target register for null target.
<case IX86_BUILTIN_XGETBV>: Ditto.
<case IX86_BUILTIN_XSETBV>: Optimize LSHIFTRT generation.
* config/i386/xsaveintrin.h (_xgetbv): Add missing return.
testsuite/ChangeLog:
PR target/85684
* gcc.target/i386/xgetsetbv.c: Check also variable arguments.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/i386/i386.c
branches/gcc-8-branch/gcc/config/i386/xsaveintrin.h
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/xgetsetbv.c
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Subject: [Bug target/85684] output of instrinsic _xgetbv is wrongly overwritten
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85684
Uroš Bizjak <ubizjak at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed for 8.2+.
>From gcc-bugs-return-606731-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 17:14:00 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86083] New: handle non-constant assignments in strlen
Date: Thu, 07 Jun 2018 17:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86083
Bug ID: 86083
Summary: handle non-constant assignments in strlen
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
As discussed in pr57230, the strlen optimizing pass manages to track string
lengths across non-nul constant character stores, it doesn't do the same for
non-constant stores even if their value is known to be non-nul (i.e., it's in
some range that excludes nul). It's a trivial enhancement to have the pass
consider value ranges and implement the tracking in the non-constant case so
that the bodies of both functions below are eliminated and not just that of
f().
$ cat c.c && gcc -O2 -S -Wall -Wextra -fdump-tree-optimized=/dev/stdout c.c
void f (void)
{
char a[] = "123";
a[1] = '4';
if (__builtin_strlen (a) != 3) // folded
__builtin_abort ();
}
void g (unsigned i)
{
char a[] = "123";
a[1] = '0' + (i % 10);
if (__builtin_strlen (a) != 3) // not folded
__builtin_abort ();
}
;; Function f (f, funcdef_no=0, decl_uid=1956, cgraph_uid=0, symbol_order=0)
f ()
{
<bb 2> [local count: 1073741825]:
return;
}
;; Function g (g, funcdef_no=1, decl_uid=1960, cgraph_uid=1, symbol_order=1)
g (unsigned int i)
{
char a[4];
unsigned int _1;
unsigned char _2;
unsigned char _3;
char _4;
long unsigned int _5;
<bb 2> [local count: 1073741825]:
a = "123";
_1 = i_8(D) % 10;
_2 = (unsigned char) _1;
_3 = _2 + 48;
_4 = (char) _3;
a[1] = _4;
_5 = __builtin_strlen (&a);
if (_5 != 3)
goto <bb 3>; [0.00%]
else
goto <bb 4>; [99.96%]
<bb 3> [count: 0]:
__builtin_abort ();
<bb 4> [local count: 1073312327]:
a ={v} {CLOBBER};
return;
}
>From gcc-bugs-return-606732-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 17:34:21 2018
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Subject: [Bug fortran/85641] [7/8/9 Regression] ICE with string concatenate
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--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Jun 7 17:33:44 2018
New Revision: 261285
URL: https://gcc.gnu.org/viewcvs?rev=261285&root=gcc&view=rev
Log:
2018-06-07 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/85641
Backport from trunk.
* frontend-passes.c (is_fe_temp): Add prototype.
(realloc_string_callback): Early return for frontend-generated
temporary.
2018-06-07 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/85641
Backport from trunk.
* gfortran.dg/realloc_on_assign_30.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/realloc_on_assign_30.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/frontend-passes.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/86045] ICE in reduce_binary_ac, at fortran/arith.c:1308
Date: Thu, 07 Jun 2018 17:53:00 -0000
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--- Comment #6 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Thu Jun 7 17:53:11 2018
New Revision: 261286
URL: https://gcc.gnu.org/viewcvs?rev=261286&root=gcc&view=rev
Log:
2018-06-07 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86045
* simplify.c (gfc_simplify_mod): Re-arrange code to test whether
'P' is zero and issue an error if it is.
2018-06-07 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86045
* gfortran.dg/pr86045.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr86045.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/simplify.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 17:55:00 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84884] [DR 2244] [C++17] protected constructor and aggregate initialization of base
Date: Thu, 07 Jun 2018 17:55:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-07
CC| |mpolacek at gcc dot gnu.org
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>From gcc-bugs-return-606735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 18:03:36 2018
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Subject: [Bug target/86084] New: trunk/gcc/config/m32c/m32c.c:4368: suspicious comparison ?
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86084
Bug ID: 86084
Summary: trunk/gcc/config/m32c/m32c.c:4368: suspicious
comparison ?
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
Target: m32c
trunk/gcc/config/m32c/m32c.c:4368:2: warning: logical ‘or’ of equal expressions
[-Wlogical-op]
Source code is
if (GET_CODE (operands[0]) == MEM
|| GET_CODE (operands[0]) == MEM)
Maybe better code
if (GET_CODE (operands[0]) == MEM
|| GET_CODE (operands[1]) == MEM)
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Subject: [Bug fortran/85641] [7/8/9 Regression] ICE with string concatenate
Date: Thu, 07 Jun 2018 18:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85641
--- Comment #7 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Jun 7 18:13:33 2018
New Revision: 261289
URL: https://gcc.gnu.org/viewcvs?rev=261289&root=gcc&view=rev
Log:
2018-06-07 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/85641
Backport from trunk.
* frontend-passes.c (is_fe_temp): Add prototype.
(realloc_string_callback): Early return for frontend-generated
temporary.
2018-06-07 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/85641
Backport from trunk.
* gfortran.dg/realloc_on_assign_30.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/realloc_on_assign_30.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/frontend-passes.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/85641] [7/8/9 Regression] ICE with string concatenate
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85641
Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #8 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed on call branches, closing.
Thanks for the bug report!
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Subject: [Bug fortran/68241] [meta-bug] [F03] Deferred-length character
Date: Thu, 07 Jun 2018 18:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
Bug 68241 depends on bug 85641, which changed state.
Bug 85641 Summary: [7/8/9 Regression] ICE with string concatenate
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85641
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/86045] ICE in reduce_binary_ac, at fortran/arith.c:1308
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86045
--- Comment #7 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Thu Jun 7 18:17:49 2018
New Revision: 261290
URL: https://gcc.gnu.org/viewcvs?rev=261290&root=gcc&view=rev
Log:
2018-06-07 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86045
* simplify.c (gfc_simplify_mod): Re-arrange code to test whether
'P' is zero and issue an error if it is.
2018-06-07 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86045
* gfortran.dg/pr86045.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr86045.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/simplify.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/86045] ICE in reduce_binary_ac, at fortran/arith.c:1308
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86045
--- Comment #8 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Thu Jun 7 18:39:30 2018
New Revision: 261291
URL: https://gcc.gnu.org/viewcvs?rev=261291&root=gcc&view=rev
Log:
2018-06-07 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86045
Backport from trunk.
* simplify.c (gfc_simplify_mod): Re-arrange code to test whether
'P' is zero and issue an error if it is.
2018-06-07 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86045
Backport from trunk.
* gfortran.dg/pr86045.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr86045.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/simplify.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/86045] ICE in reduce_binary_ac, at fortran/arith.c:1308
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.4
--- Comment #9 from kargl at gcc dot gnu.org ---
Fixed on 7-branch, 8-branch, and trunk.
Thanks for the bug report.
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Subject: [Bug fortran/86051] internal compiler error: in conv_function_val, at fortran/trans-expr.c:3717
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Depends on| |85996
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85996
[Bug 85996] [8/9 Regression] ICE: gfc_trans_select(): Bad type for case expr.
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Subject: [Bug c/85318] -Wc90-c99-compat does not warn about for loop initial declarations
Date: Thu, 07 Jun 2018 19:16:00 -0000
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu Jun 7 19:15:45 2018
New Revision: 261293
URL: https://gcc.gnu.org/viewcvs?rev=261293&root=gcc&view=rev
Log:
PR c/85318
* c-decl.c (check_for_loop_decls): Add -Wc90-c99-compat warning about
for loop initial declarations.
* gcc.dg/Wc90-c99-compat-10.c: New test.
* gcc.dg/Wc90-c99-compat-11.c: New test.
* gcc.dg/Wc90-c99-compat-12.c: New test.
* gcc.dg/Wc90-c99-compat-9.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/Wc90-c99-compat-10.c
trunk/gcc/testsuite/gcc.dg/Wc90-c99-compat-11.c
trunk/gcc/testsuite/gcc.dg/Wc90-c99-compat-12.c
trunk/gcc/testsuite/gcc.dg/Wc90-c99-compat-9.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 19:17:06 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/85318] -Wc90-c99-compat does not warn about for loop initial declarations
Date: Thu, 07 Jun 2018 19:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85318
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed for GCC 9.
>From gcc-bugs-return-606745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 19:25:50 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/45879] strcpy returns unexpected result
Date: Thu, 07 Jun 2018 19:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45879
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
GCC 8.1 diagnoses the bug with -Wrestrict:
pr45879.c: In function ‘main’:
pr45879.c:12:7: warning: ‘strcpy’ accessing 5 bytes at offsets 4 and 5 overlaps
4 bytes at offset 5 [-Wrestrict]
strcpy(&data[4], &data[5]);
^~~~~~~~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-606746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 19:57:23 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86085] New: I/O built-ins considered argument clobbers
Date: Thu, 07 Jun 2018 19:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86085
Bug ID: 86085
Summary: I/O built-ins considered argument clobbers
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
The buggy test case in pr67610 should be diagnosed by -Wrestrict but isn't.
Debugging shows that the strlen pass discards the length information for the
array in g() in response to the alias oracle determining that the printf() call
might clobber the array argument. Except for printf with the %n directive,
standard output functions don't modify their arguments.
$ cat z.c && gcc -O2 -S -Wall -Wextra -fdump-tree-optimized=/dev/stdout z.c
void f (void)
{
char s[] = "123";
char d[sizeof s];
__builtin_sprintf (d, "%s", s); // eliminated (transformed to strcpy by
sprintf pass)
if (__builtin_strlen (s) != 3) // folded
__builtin_abort ();
if (__builtin_strlen (d) != 3) // also folded
__builtin_abort ();
}
void g (void)
{
char s[] = "123";
__builtin_puts (s);
if (__builtin_strlen (s) != 3) // not folded
__builtin_abort ();
}
;; Function f (f, funcdef_no=0, decl_uid=1956, cgraph_uid=0, symbol_order=0)
f ()
{
<bb 2> [local count: 1073741825]:
return;
}
;; Function g (g, funcdef_no=1, decl_uid=1961, cgraph_uid=1, symbol_order=1)
g ()
{
char s[4];
long unsigned int _1;
<bb 2> [local count: 1073741825]:
s = "123";
__builtin_puts (&s);
_1 = __builtin_strlen (&s);
if (_1 != 3)
goto <bb 3>; [0.00%]
else
goto <bb 4>; [99.96%]
<bb 3> [count: 0]:
__builtin_abort ();
<bb 4> [local count: 1073312327]:
s ={v} {CLOBBER};
return;
}
>From gcc-bugs-return-606747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 20:27:40 2018
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Subject: [Bug fortran/85631] [8/9 Regression] Runtime error message array bound mismatch with nonzero optimization
Date: Thu, 07 Jun 2018 20:27:00 -0000
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--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
The matmul inlining is only exposing a bug in reshape with
allocatable variables.
This also fails:
$ cat a.f90
implicit none
integer, parameter :: N=2
real, dimension(:,:), allocatable :: block_1
real, allocatable, dimension(:,:) :: var_1_mma
allocate(block_1(N,N))
block_1 = reshape([-2,3,-5,7], [2,2])
var_1_mma = transpose(block_1)
print *,var_1_mma
end program
$ gfortran -fcheck=bounds a.f90
$ ./a.out
At line 9 of file a.f90
Fortran runtime error: Array bound mismatch for dimension 1 of array
'var_1_mma' (140020497252353/2)
Error termination. Backtrace:
#0 0x400f95 in ???
#1 0x401445 in ???
#2 0x7f59b6c8d724 in ???
#3 0x4007f8 in ???
at ../sysdeps/x86_64/start.S:118
#4 0xffffffffffffffff in ???
>From gcc-bugs-return-606748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 20:40:59 2018
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From: "ptdrnvqd at 10mail dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/86086] New: lto1: internal compiler error: in odr_types_equivalent_p, at ipa-devirt.c:1256
Date: Thu, 07 Jun 2018 20:40:00 -0000
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Bug ID: 86086
Summary: lto1: internal compiler error: in
odr_types_equivalent_p, at ipa-devirt.c:1256
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
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gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.3.0-21ubuntu1~16.04' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.3.0 (Ubuntu 7.3.0-21ubuntu1~16.04)
command:
(cd
/home/lmint-sgt2_usrnam-01/.cache/bazel/_bazel_lmint-sgt2_usrnam-01/4b7ce482992596b3314a677549b0daa3/execroot/org_tensorflow
&& exec env - ANDROID_BUILD_TOOLS_VERSION=28.0.0
ANDROID_NDK_API_LEVEL=17
ANDROID_NDK_HOME=/home/lmint-sgt2_usrnam-01/Android/Sdk/ndk-bundle
ANDROID_SDK_API_LEVEL=27
ANDROID_SDK_HOME=/home/lmint-sgt2_usrnam-01/Android/Sdk
COMPUTECPP_TOOLKIT_PATH=/home/lmint-sgt2_usrnam-01/Downloads/programs/ComputeCpp-CE-0.8.0-Ubuntu-16.04-x86_64
HOST_CXX_COMPILER=/usr/bin/g++ HOST_C_COMPILER=/usr/bin/gcc
PATH=/home/lmint-sgt2_usrnam-01/.nix-profile/bin:/home/lmint-sgt2_usrnam-01/.cargo/bin:/opt/OpenPrinting-Gutenprint/sbin:/opt/OpenPrinting-Gutenprint/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
PWD=/proc/self/cwd PYTHON_BIN_PATH=/usr/bin/python3
PYTHON_LIB_PATH=/usr/local/lib/python3.5/dist-packages TF_DOWNLOAD_CLANG=0
TF_NEED_COMPUTECPP=1 TF_NEED_CUDA=0 TF_NEED_OPENCL_SYCL=1
/usr/bin/gcc -shared -o
bazel-out/k8-opt/bin/tensorflow/libtensorflow_framework.so
'-Wl,-rpath,$ORIGIN/../_solib_k8/_U@mkl_Ulinux_S_S_Cmkl_Ulibs_Ulinux___Uexternal_Smkl_Ulinux_Slib'
-Lbazel-out/k8-opt/bin/_solib_k8/_U@mkl_Ulinux_S_S_Cmkl_Ulibs_Ulinux___Uexternal_Smkl_Ulinux_Slib
'-Wl,-rpath,$ORIGIN/' -Wl,-soname,libtensorflow_framework.so -pthread
-save-temps '-fuse-ld=gold' -Wl,-no-as-needed -Wl,-z,relro,-z,now -B/usr/bin
-B/usr/bin -pass-exit-codes -Wl,--gc-sections -g0 -s -Wl,-z,relro,-z,now -v
-Wl,-O1 -Wl,--relax -Wl,--gc-sections -Wl,-S
-Wl,@bazel-out/k8-opt/bin/tensorflow/libtensorflow_framework.so-2.params)
output:
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.3.0-21ubuntu1~16.04' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.3.0 (Ubuntu 7.3.0-21ubuntu1~16.04)
COMPILER_PATH=/usr/bin/:/usr/bin/:/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/bin/:/usr/bin/:/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/7/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-shared' '-o'
'bazel-out/k8-opt/bin/tensorflow/libtensorflow_framework.so'
'-Lbazel-out/k8-opt/bin/_solib_k8/_U@mkl_Ulinux_S_S_Cmkl_Ulibs_Ulinux___Uexternal_Smkl_Ulinux_Slib'
'-pthread' '-save-temps' '-fuse-ld=gold' '-B' '/usr/bin' '-B' '/usr/bin' '-g0'
'-s' '-v' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/7/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/7/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
-plugin-opt=-fresolution=libtensorflow_framework.so-2.res
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lpthread -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --sysroot=/
--build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed -shared
-fuse-ld=gold -z relro -o
bazel-out/k8-opt/bin/tensorflow/libtensorflow_framework.so -s
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/crti.o
/usr/lib/gcc/x86_64-linux-gnu/7/crtbeginS.o
-Lbazel-out/k8-opt/bin/_solib_k8/_U@mkl_Ulinux_S_S_Cmkl_Ulibs_Ulinux___Uexternal_Smkl_Ulinux_Slib
-L/usr/bin -L/usr/bin -L/usr/lib/gcc/x86_64-linux-gnu/7
-L/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib -L/lib/x86_64-linux-gnu
-L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib
-L/usr/lib/gcc/x86_64-linux-gnu/7/../../.. -rpath
$ORIGIN/../_solib_k8/_U@mkl_Ulinux_S_S_Cmkl_Ulibs_Ulinux___Uexternal_Smkl_Ulinux_Slib
-rpath $ORIGIN/ -soname libtensorflow_framework.so -no-as-needed -z relro -z
now --gc-sections -z relro -z now -O1 --relax --gc-sections -S
@bazel-out/k8-opt/bin/tensorflow/libtensorflow_framework.so-2.params -lgcc
--push-state --as-needed -lgcc_s --pop-state -lpthread -lc -lgcc --push-state
--as-needed -lgcc_s --pop-state /usr/lib/gcc/x86_64-linux-gnu/7/crtendS.o
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/crtn.o
/usr/bin/gcc @/tmp/ccPaUa5v
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.3.0-21ubuntu1~16.04' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.3.0 (Ubuntu 7.3.0-21ubuntu1~16.04)
COLLECT_GCC_OPTIONS='-c' '-fmath-errno' '-fsigned-zeros' '-ftrapping-math'
'-fno-trapv' '-fno-openacc' '-march=haswell' '-mmmx' '-mno-3dnow' '-msse'
'-msse2' '-mssse3' '-mno-sse4a' '-mcx16' '-msahf' '-mmovbe' '-maes' '-mno-sha'
'-mpclmul' '-mpopcnt' '-mabm' '-mno-lwp' '-mfma' '-mno-fma4' '-mno-xop' '-mbmi'
'-mno-sgx' '-mbmi2' '-mno-tbm' '-mavx' '-mavx2' '-msse4.2' '-msse4.1' '-mlzcnt'
'-mno-rtm' '-mno-hle' '-mrdrnd' '-mf16c' '-mfsgsbase' '-mno-rdseed'
'-mno-prfchw' '-mno-adx' '-mfxsr' '-mxsave' '-mxsaveopt' '-mno-avx512f'
'-mno-avx512er' '-mno-avx512cd' '-mno-avx512pf' '-mno-prefetchwt1'
'-mno-clflushopt' '-mno-xsavec' '-mno-xsaves' '-mno-avx512dq' '-mno-avx512bw'
'-mno-avx512vl' '-mno-avx512ifma' '-mno-avx512vbmi' '-mno-avx5124fmaps'
'-mno-avx5124vnniw' '-mno-clwb' '-mno-mwaitx' '-mno-clzero' '-mno-pku'
'-mno-rdpid' '-mtune=haswell' '-m64' '-maccumulate-outgoing-args' '-m8bit-idiv'
'-minline-stringops-dynamically' '-msse3' '-O3' '-O3' '-O3' '-O3' '-fPIC'
'-fno-exceptions' '-fopenmp' '-shared'
'-Lbazel-out/k8-opt/bin/_solib_k8/_U@mkl_Ulinux_S_S_Cmkl_Ulibs_Ulinux___Uexternal_Smkl_Ulinux_Slib'
'-pthread' '-save-temps' '-fuse-ld=gold' '-B' '/usr/bin' '-B' '/usr/bin' '-g0'
'-s' '-v' '-mtune=generic' '-march=x86-64' '-dumpdir'
'bazel-out/k8-opt/bin/tensorflow/' '-dumpbase' 'libtensorflow_framework.so.wpa'
'-fltrans-output-list=libtensorflow_framework.so.ltrans.out' '-fwpa'
'-fresolution=libtensorflow_framework.so-2.res' '-flinker-output=dyn'
'-pthread'
/usr/lib/gcc/x86_64-linux-gnu/7/lto1 -quiet -dumpdir
bazel-out/k8-opt/bin/tensorflow/ -dumpbase libtensorflow_framework.so.wpa
-march=haswell -mmmx -mno-3dnow -msse -msse2 -mssse3 -mno-sse4a -mcx16 -msahf
-mmovbe -maes -mno-sha -mpclmul -mpopcnt -mabm -mno-lwp -mfma -mno-fma4
-mno-xop -mbmi -mno-sgx -mbmi2 -mno-tbm -mavx -mavx2 -msse4.2 -msse4.1 -mlzcnt
-mno-rtm -mno-hle -mrdrnd -mf16c -mfsgsbase -mno-rdseed -mno-prfchw -mno-adx
-mfxsr -mxsave -mxsaveopt -mno-avx512f -mno-avx512er -mno-avx512cd
-mno-avx512pf -mno-prefetchwt1 -mno-clflushopt -mno-xsavec -mno-xsaves
-mno-avx512dq -mno-avx512bw -mno-avx512vl -mno-avx512ifma -mno-avx512vbmi
-mno-avx5124fmaps -mno-avx5124vnniw -mno-clwb -mno-mwaitx -mno-clzero -mno-pku
-mno-rdpid -mtune=haswell -m64 -maccumulate-outgoing-args -m8bit-idiv
-minline-stringops-dynamically -msse3 -mtune=generic -march=x86-64 -auxbase
feature_util.pic -g0 -O3 -O3 -O3 -O3 -version -fmath-errno -fsigned-zeros
-ftrapping-math -fno-trapv -fno-openacc -fPIC -fno-exceptions -fopenmp
-fuse-ld=gold -fltrans-output-list=libtensorflow_framework.so.ltrans.out -fwpa
-fresolution=libtensorflow_framework.so-2.res -flinker-output=dyn
@/tmp/cciTagMw
GNU GIMPLE (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
compiled by GNU C version 7.3.0, GMP version 6.1.0, MPFR version 3.1.4,
MPC version 1.0.3, isl version isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU GIMPLE (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
compiled by GNU C version 7.3.0, GMP version 6.1.0, MPFR version 3.1.4,
MPC version 1.0.3, isl version isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
tensorflow/core/common_runtime/function.cc:56:8: warning: type 'struct
Endpoint' violates the C++ One Definition Rule [-Wodr]
struct Endpoint {
^
tensorflow/core/common_runtime/memory_types.cc:29:8: note: a different type is
defined in another translation unit
struct Endpoint {
^
tensorflow/core/common_runtime/function.cc:57:9: note: the first difference of
corresponding definitions is field 'node'
Node* node;
^
tensorflow/core/common_runtime/memory_types.cc:30:7: note: a field with
different name is defined in another translation unit
int node_id;
^
lto1: internal compiler error: in odr_types_equivalent_p, at ipa-devirt.c:1256
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
lto-wrapper: fatal error: /usr/bin/gcc returned 1 exit status
compilation terminated.
[Leaving LTRANS libtensorflow_framework.so.ltrans.out]
/usr/bin/ld.gold: fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status
>From gcc-bugs-return-606749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 21:28:57 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86059] ICE in reduce_binary_ac, at fortran/arith.c:1308 (and others)
Date: Thu, 07 Jun 2018 21:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86059
kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-07
CC| |kargl at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from kargl at gcc dot gnu.org ---
I have a patch for this, but I need to spend time
with the standard because I cannot find a prohibition
against NULL() in an array constructor (although it
makes absolutely no sense to allow it).
Watch for cut-n-paste tab corruption
Index: array.c
===================================================================
--- array.c (revision 261285)
+++ array.c (working copy)
@@ -1098,6 +1098,16 @@ match_array_cons_element (gfc_constructor_base *result
if (m != MATCH_YES)
return m;
+ if (expr->expr_type == EXPR_FUNCTION
+ && expr->ts.type == BT_UNKNOWN
+ && strcmp(expr->symtree->name, "null") == 0)
+ {
+ gfc_error ("NULL() at %L cannot appear in an array constructor",
+ &expr->where);
+ gfc_free_expr (expr);
+ return MATCH_ERROR;
+ }
+
gfc_constructor_append_expr (result, expr, &gfc_current_locus);
return MATCH_YES;
}
gfcx -c ~/tmp/a.f90
/safe/sgk/tmp/a.f90:2:32:
integer :: i(2) = [integer :: null(), 1]
1
Error: NULL() at (1) cannot appear in an array construct
/safe/sgk/tmp/a.f90:3:24:
integer :: j(2) = [1, null()]
1
Error: NULL() at (1) cannot appear in an array construct
/safe/sgk/tmp/a.f90:4:23:
integer :: k(2) = [(null(), n=1, 2)]
1
Error: NULL() at (1) cannot appear in an array construct
>From gcc-bugs-return-606750-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 23:05:03 2018
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/85620] Missing ENDBR after swapcontext
Date: Thu, 07 Jun 2018 23:05:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|WONTFIX |---
--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
We want to generate ENDBR after swapcontext. swapcontext didn't return the
first time. It was just kind of "suspended". Mark it return twice will
unnecessarily disable compiler optimization.
>From gcc-bugs-return-606751-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 23:05:04 2018
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Subject: [Bug target/81652] [meta-bug] -fcf-protection=full bugs
Date: Thu, 07 Jun 2018 23:05:00 -0000
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Bug 81652 depends on bug 85620, which changed state.
Bug 85620 Summary: Missing ENDBR after swapcontext
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85620
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|WONTFIX |---
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Subject: [Bug lto/86086] lto1: internal compiler error: in odr_types_equivalent_p, at ipa-devirt.c:1256
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--- Comment #1 from ptdrnvqd at 10mail dot org ---
Created attachment 44249
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44249&action=edit
redo -save-temps output for gcc 8.1.0, add flto to link flags
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Subject: [Bug lto/86086] lto1: internal compiler error: in odr_types_equivalent_p, at ipa-devirt.c:1256
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--- Comment #2 from ptdrnvqd at 10mail dot org ---
same error when gcc 8.1.0, (even though added -flto missing in link flags
earlier)
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
8.1.0-5ubuntu1~16.04' --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 --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 8.1.0 (Ubuntu 8.1.0-5ubuntu1~16.04)
command:
(cd
/home/lmint-sgt2_usrnam-01/.cache/bazel/_bazel_lmint-sgt2_usrnam-01/4b7ce482992596b3314a677549b0daa3/execroot/org_tensorflow
&& exec env - ANDROID_BUILD_TOOLS_VERSION=28.0.0
ANDROID_NDK_API_LEVEL=17
ANDROID_NDK_HOME=/home/lmint-sgt2_usrnam-01/Android/Sdk/ndk-bundle
ANDROID_SDK_API_LEVEL=27
ANDROID_SDK_HOME=/home/lmint-sgt2_usrnam-01/Android/Sdk
COMPUTECPP_TOOLKIT_PATH=/home/lmint-sgt2_usrnam-01/Downloads/programs/ComputeCpp-CE-0.8.0-Ubuntu-16.04-x86_64
HOST_CXX_COMPILER=/usr/bin/g++ HOST_C_COMPILER=/usr/bin/gcc
PATH=/home/lmint-sgt2_usrnam-01/.nix-profile/bin:/home/lmint-sgt2_usrnam-01/.cargo/bin:/opt/OpenPrinting-Gutenprint/sbin:/opt/OpenPrinting-Gutenprint/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
PWD=/proc/self/cwd PYTHON_BIN_PATH=/usr/bin/python3
PYTHON_LIB_PATH=/usr/local/lib/python3.5/dist-packages TF_DOWNLOAD_CLANG=0
TF_NEED_COMPUTECPP=1 TF_NEED_CUDA=0 TF_NEED_OPENCL_SYCL=1
/usr/bin/gcc -shared -o
bazel-out/k8-opt/bin/tensorflow/libtensorflow_framework.so
'-Wl,-rpath,$ORIGIN/../_solib_k8/_U@mkl_Ulinux_S_S_Cmkl_Ulibs_Ulinux___Uexternal_Smkl_Ulinux_Slib'
-Lbazel-out/k8-opt/bin/_solib_k8/_U@mkl_Ulinux_S_S_Cmkl_Ulibs_Ulinux___Uexternal_Smkl_Ulinux_Slib
'-Wl,-rpath,$ORIGIN/' -Wl,-soname,libtensorflow_framework.so -pthread
'-fuse-ld=gold' -save-temps -Wl,-no-as-needed -Wl,-z,relro,-z,now -B/usr/bin
-B/usr/bin -pass-exit-codes -Wl,--gc-sections -pipe -flto -fuse-linker-plugin
-g0 -s -Wl,-z,relro,-z,now -v -Wl,-O1 -Wl,--relax -Wl,--gc-sections -Wl,-S
-Wl,@bazel-out/k8-opt/bin/tensorflow/libtensorflow_framework.so-2.params)
>From gcc-bugs-return-606754-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 07 23:28:36 2018
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Subject: [Bug lto/86086] lto1: internal compiler error: in odr_types_equivalent_p, at ipa-devirt.c:1256
Date: Thu, 07 Jun 2018 23:28:00 -0000
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--- Comment #3 from ptdrnvqd at 10mail dot org ---
Created attachment 44250
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44250&action=edit
gcc 8.1.0 output
>From gcc-bugs-return-606755-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 01:12:41 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/63327] Poor caret location in error mesage
Date: Fri, 08 Jun 2018 01:12:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Component|fortran |libgomp
--- Comment #3 from kargl at gcc dot gnu.org ---
Changed component to libgomp as the error does not seem to be
coming from the Fortran frontend. At, grep of all files in
gcc/fortran with various phrases from "not specified in enclosing"
does not find a candidate error message.
>From gcc-bugs-return-606756-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 02:42:33 2018
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/86087] New: ICE in rtl_verify_fallthru, at cfgrtl.c:2911 (error: verify_flow_info: Incorrect fallthru 8->9; error: wrong insn in the fallthru edge)
Date: Fri, 08 Jun 2018 02:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86087
Bug ID: 86087
Summary: ICE in rtl_verify_fallthru, at cfgrtl.c:2911 (error:
verify_flow_info: Incorrect fallthru 8->9; error:
wrong insn in the fallthru edge)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: powerpc-*-linux-gnu*
gcc-9.0.0-alpha20180603 snapshot (r261132) ICEs when compiling the following
snippet w/ -O3 (-Ofast) -floop-parallelize-all -frename-registers
-freorder-blocks-and-partition -ftrapv -ftree-parallelize-loops=2
-fno-expensive-optimizations -fno-tree-coalesce-vars -fno-tree-dce
-fno-tree-loop-im:
long long int
bp (int *tp, int o3, int lv)
{
int cs = 0;
long long int nn = lv;
while (tp[0] + lv + nn != 0)
nn = tp[0] + 1;
while (cs < o3)
{
nn |= (tp[cs] + 1) / (!!tp[0] + 1);
++cs;
}
return nn;
}
% powerpc-e300c3-linux-gnu-gcc-9.0.0-alpha20180603 -O3 -floop-parallelize-all
-frename-registers -freorder-blocks-and-partition -ftrapv
-ftree-parallelize-loops=2 -fno-expensive-optimizations -fno-tree-coalesce-vars
-fno-tree-dce -fno-tree-loop-im -c l1fi3pyz.c
l1fi3pyz.c: In function 'bp':
l1fi3pyz.c:17:1: error: verify_flow_info: Incorrect fallthru 8->9
}
^
l1fi3pyz.c:17:1: error: wrong insn in the fallthru edge
(barrier 549 513 362)
during RTL pass: bbro
l1fi3pyz.c:17:1: internal compiler error: in rtl_verify_fallthru, at
cfgrtl.c:2911
0x556c7c _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/rtl-error.c:108
0x751063 rtl_verify_fallthru
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/cfgrtl.c:2911
0x751063 rtl_verify_flow_info
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/cfgrtl.c:3012
0x73061b verify_flow_info()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/cfghooks.c:263
0x74e581 checking_verify_flow_info
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/cfghooks.h:198
0x74e581 cfg_layout_finalize()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/cfgrtl.c:4333
0x1376de1 execute
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/bb-reorder.c:2646
>From gcc-bugs-return-606757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 03:40:47 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/63514] functions containing volatile are considered pure
Date: Fri, 08 Jun 2018 03:40:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #4 from kargl at gcc dot gnu.org ---
(In reply to Richard Biener from comment #2)
> The fortran frontend must do sth wrong here - it seems to mark the function
> pure itself and either fold or the FE even does the optimization (look at
> the .original dump).
A Fortran compiler is free to assume that a function does not have
side-effects. The Fortran standard does provide a programmer with
the PURE and IMPURE attribute that can be used to provide hints to
the compiler. If neither PURE nor IMPURE appears in a function
declaration, the standard does not specify how the function is
treated with respect to pureness of impureness. It is also noted
that only requirement on IMPURE is with an IMPURE ELEMENTAL
subprogram. In this situation, the array elements of an actual
argument must be handled in array element order.
There is, however, a bug with respect to F2018:
C1588 A local variable of a pure subprogram, or of a BLOCK construct
within a pure subprogram, shall not have the SAVE or VOLATILE attribute.
gfortran is required to issue an error message, which she doesn't at
the moment.
Other than fixing C1588, I think this should be closed as WONTFIX.
A programmer, who depends on function side-effects, should have
his or her programming card revoked.
>From gcc-bugs-return-606758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 04:04:49 2018
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From: "shibatch at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/86088] New: #pragma omp parallel for freezes if other processes are running
Date: Fri, 08 Jun 2018 04:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86088
Bug ID: 86088
Summary: #pragma omp parallel for freezes if other processes
are running
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgomp
Assignee: unassigned at gcc dot gnu.org
Reporter: shibatch at users dot sourceforge.net
CC: jakub at gcc dot gnu.org
Target Milestone: ---
The following small program takes more than 20 seconds to finish.
It quickly finishes if compiled with clang.
It finishes instantly without fork().
OS: Ubuntu 16.04.4 LTS
CPU: Core i7-6700
$ gcc-8.1.0 -fopenmp stall.c
$ time ./a.out
real 0m26.846s
user 1m47.288s
sys 0m0.004s
$ clang-6.0 -fopenmp stall.c
$ time ./a.out
real 0m0.423s
user 0m1.244s
sys 0m0.012s
--
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#define SIZEA 100
#define SIZEB 10000
unsigned char a[SIZEA * SIZEB], b[SIZEA * SIZEB];
int main(int argc, char **argv) {
fork();
int i;
for(i=0;i<1000;i++) {
int y;
#pragma omp parallel for
for(y=0;y<SIZEA;y++) memcpy(&a[y*SIZEB], &b[y*SIZEB], SIZEB);
}
}
>From gcc-bugs-return-606759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 06:08:32 2018
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/82479] missing popcount builtin detection
Date: Fri, 08 Jun 2018 06:08:00 -0000
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--- Comment #12 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Latest patch:
https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00358.html
>From gcc-bugs-return-606760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 07:08:21 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/63327] Poor caret location in error mesage
Date: Fri, 08 Jun 2018 07:08:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|libgomp |fortran
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Changing the component back, libgomp is just a library, the error is emitted by
the middle-end, but using location information from the FE, which is incorrect
in this case (the location_t on the OMP_PARALLEL when using !$OMP line
continuation).
>From gcc-bugs-return-606761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 07:26:09 2018
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Subject: [Bug libgomp/86088] #pragma omp parallel for freezes if other processes are running
Date: Fri, 08 Jun 2018 07:26:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
You are oversubscribing the machine this way in multiple processes and aren't
using OMP_DYNAMIC=true or omp_set_dynamic to even adjust it based on load
average (not that it would help in this case, because once a particular number
of threads is decided, it needs to be kept until a parallel with a different
num_threads etc. appears, not the case here, and the checks for loadavg might
happen in this case quite concurrently and not notice the oversubscribing yet).
So it is all about the OMP_WAIT_POLICY or GOMP_SPINCOUNT in this case, for
oversubscribed case you want to lower the spincount and at the expense of
bigger latencies.
So just use OMP_WAIT_POLICY=passive or GOMP_SPINCOUNT=some_low_number.
>From gcc-bugs-return-606762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 08:16:29 2018
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Subject: [Bug target/82092] [8/9 regression] gcc fails to link genmodes on darwin (cfiStartsArray[i] != cfiStartsArray[i-1])
Date: Fri, 08 Jun 2018 08:16:00 -0000
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Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |fxcoudert at gcc dot gnu.org
--- Comment #14 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
Homebrew has been shipping GCC 8.1.0 (unmatched) since release: it builds fine
on our CI machines, and we haven't had a user bug report since then. I wasn't
even aware that there was a potential issue.
>From gcc-bugs-return-606763-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 08:19:44 2018
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Subject: [Bug target/81497] [7/8 Regression] error compiling arm_acle.h
Date: Fri, 08 Jun 2018 08:19:00 -0000
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--- Comment #6 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Fri Jun 8 08:18:43 2018
New Revision: 261305
URL: https://gcc.gnu.org/viewcvs?rev=261305&root=gcc&view=rev
Log:
[arm] PR target/81497: Fix arm_acle.h for C++
Backport from mainline
2018-06-05 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR target/81497
* config/arm/arm-builtins.c (arm_type_qualifiers): Add
qualifier_void_pointer and qualifier_const_void_pointer.
(arm_ldc_qualifiers, arm_stc_qualifiers): Use the above.
(arm_init_builtins): Handle the above.
* config/arm/arm_acle.h (__arm_cdp, __arm_ldc, __arm_ldcl, __arm_stc,
__arm_stcl, __arm_mcr, __arm_cdp2, __arm_ldc2, __arm_ldcl2, __arm_stc2,
__arm_stcl2,__arm_mcr2, __arm_mcrr, __arm_mcrr2): Remove return for
void intrinsics.
* g++.target/arm/arm.exp: New file.
* g++.target/arm/pr81497.C: Likewise.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.target/arm/
branches/gcc-8-branch/gcc/testsuite/g++.target/arm/arm.exp
branches/gcc-8-branch/gcc/testsuite/g++.target/arm/pr81497.C
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/arm/arm-builtins.c
branches/gcc-8-branch/gcc/config/arm/arm_acle.h
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug lto/86086] lto1: internal compiler error: in odr_types_equivalent_p, at ipa-devirt.c:1256
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Thanks for the report. Can you please send me steps how to build that locally?
>From gcc-bugs-return-606765-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 10:32:47 2018
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Subject: [Bug fortran/45521] [F08] GENERIC resolution with ALLOCATABLE/POINTER and PROCEDURE
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--- Comment #17 from janus at gcc dot gnu.org ---
Another case that is not yet working is when polymorphic arguments are
involved:
type :: t
end type
interface test
procedure testAlloc
procedure testPtr
end interface
contains
logical function testAlloc(obj)
class(t), allocatable :: obj
testAlloc = .true.
end function
logical function testPtr(obj)
class(t), pointer :: obj
testPtr = .false.
end function
end
Using type(t) instead of class(t), this case is correctly accepted, but in the
above form gfortran wrongly complains:
Error: Ambiguous interfaces in generic interface 'test' for ‘testalloc’ at (1)
and ‘testptr’ at (2)
>From gcc-bugs-return-606766-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 10:33:07 2018
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Subject: [Bug fortran/45521] [F08] GENERIC resolution with ALLOCATABLE/POINTER and PROCEDURE
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janus at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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Target Milestone|--- |9.0
>From gcc-bugs-return-606767-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 10:44:48 2018
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Subject: [Bug fortran/86006] compile time error generic type bound procedure
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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CC| |janus at gcc dot gnu.org
--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Related to/duplicate of pr45521.
>From gcc-bugs-return-606768-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 10:46:07 2018
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Subject: [Bug fortran/45521] [F08] GENERIC resolution with ALLOCATABLE/POINTER and PROCEDURE
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--- Comment #18 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Related to pr86006.
>From gcc-bugs-return-606769-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 11:16:09 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/45521] [F08] GENERIC resolution with ALLOCATABLE/POINTER and PROCEDURE
Date: Fri, 08 Jun 2018 11:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45521
--- Comment #19 from janus at gcc dot gnu.org ---
There seem to be additional issues with ASSIGNMENT interfaces:
type :: t
end type
interface test ! accepted
procedure testAlloc
procedure testPtr
end interface
interface assignment(=) ! rejected as ambiguous
procedure testAlloc
procedure testPtr
end interface
contains
subroutine testAlloc(obj, val)
type(t), allocatable, intent(out) :: obj
integer, intent(in) :: val
end subroutine
subroutine testPtr(obj, val)
type(t), pointer, intent(out) :: obj
integer, intent(in) :: val
end subroutine
end
Error: Ambiguous interfaces in intrinsic assignment operator for ‘testalloc’ at
(1) and ‘testptr’ at (2)
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86006] compile time error generic type bound procedure
Date: Fri, 08 Jun 2018 11:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86006
janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #8 from janus at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #6)
> > here is the link:
> >
> > https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/779807
>
> What do you conclude from the posts?
I conclude that the test case is not valid Fortran and gfortran is right to
complain. IanH gives some very clear arguments for this.
Closing as invalid ...
>From gcc-bugs-return-606771-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 12:08:51 2018
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From: "mario-baumann at web dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86089] New: ICE in get_string_length, at tree-ssa-strlen.c:653
Date: Fri, 08 Jun 2018 12:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86089
Bug ID: 86089
Summary: ICE in get_string_length, at tree-ssa-strlen.c:653
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Reporter: mario-baumann at web dot de
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Created attachment 44251
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44251&action=edit
c-source
Hi, attached code fails with:
> /Gcc/9.0.0/bin/gcc -m64 -O2 -c hoo.c
during GIMPLE pass: strlen
hoo.c: In function 'hoo':
hoo.c:3:6: internal compiler error: in get_string_length, at
tree-ssa-strlen.c:653
void hoo (char* in)
^~~
libbacktrace could not find executable to open
> compilation with -01 works fine
> /Gcc/9.0.0/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/Gcc/9.0.0/bin/gcc
COLLECT_LTO_WRAPPER=/Gcc/9.0.0/libexec/gcc/x86_64-apple-darwin17/9.0.0/lto-wrapper
Target: x86_64-apple-darwin17
Configured with: /Gcc/9.0.0/.src/configure --prefix=/Gcc/9.0.0
--build=x86_64-apple-darwin17 --enable-languages=c,c++,fortran --enable-lto
--enable-stage1-checking --enable-libstdcxx-time --disable-nls
--disable-libquadmath --disable-libquadmath-support --with-ld=/opt/local/bin/ld
--with-ar=/opt/local/bin/ar --with-as=/opt/local/bin/as --with-system-zlib
--with-pkgversion=svn-revision-261305
Thread model: posix
gcc version 9.0.0 20180608 (experimental) (svn-revision-261305)
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Subject: [Bug other/84613] [meta-bug] SPEC compiler performance issues
Date: Fri, 08 Jun 2018 13:22:00 -0000
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Bug 84613 depends on bug 82804, which changed state.
Bug 82804 Summary: [7/8/9 Regression] SPEC CPU2006 470.lbm ~5% performance deviation with r237185
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82804
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |WONTFIX
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Subject: [Bug target/82804] [7/8/9 Regression] SPEC CPU2006 470.lbm ~5% performance deviation with r237185
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Martin Jambor <jamborm at gcc dot gnu.org> ---
This is a code layout issue with Zens (and a very quirky one, it is sometimes
measurable and sometimes not, depending how the function happens to be placed
on a particular system) and probably nothing that GCC can help with.
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Subject: [Bug middle-end/26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
Date: Fri, 08 Jun 2018 13:22:00 -0000
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Bug 26163 depends on bug 82804, which changed state.
Bug 82804 Summary: [7/8/9 Regression] SPEC CPU2006 470.lbm ~5% performance deviation with r237185
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82804
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
>From gcc-bugs-return-606775-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 13:27:14 2018
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/86024] Missed memcpy loop distribution with elementwise copy
Date: Fri, 08 Jun 2018 13:27:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Or we may want to un-"SRA" such patterns, generating aggregate copies.
I notice that store-merging does not merge these stores, I didn't check why.
SLP can do it for long but not for int (no vector of 2 ints) with
-fdisable-tree-vect.
(anyway that's too late for ldist, the DR / vectorizer approach sounds better,
just mentioning this as another possible missed optimization)
The testcase is a simplified version of boost::container::flat_map<int,int>.
The most important missing transformation is memmove, but it was easier to
report memcpy and I kind of expect that they may all be fixed together.
>From gcc-bugs-return-606776-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 13:36:48 2018
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/86024] Missed memcpy loop distribution with elementwise copy
Date: Fri, 08 Jun 2018 13:36:00 -0000
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--- Comment #3 from bin cheng <amker at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #2)
> (In reply to Richard Biener from comment #1)
> > Or we may want to un-"SRA" such patterns, generating aggregate copies.
>
> I notice that store-merging does not merge these stores, I didn't check why.
> SLP can do it for long but not for int (no vector of 2 ints) with
> -fdisable-tree-vect.
>
> (anyway that's too late for ldist, the DR / vectorizer approach sounds
> better, just mentioning this as another possible missed optimization)
Yes, merging and SRA are conflicting with each other here, and it's difficult
to get a model deciding when to do what. With DR improvement, we can identify
and connect two or more builtin partitions in ldist.
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From: "d.khalikov at partner dot samsung.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/86090] New: [ASAN] ASAN does not properly configure libbacktrace.
Date: Fri, 08 Jun 2018 14:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86090
Bug ID: 86090
Summary: [ASAN] ASAN does not properly configure libbacktrace.
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: d.khalikov at partner dot samsung.com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Created attachment 44252
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44252&action=edit
libsanitizer.patch
Since sanitizers build libbacktrace from source, sanitizer's configure should
check for lstat and readlink function directly, because by default libbacktrace
uses dummy versions which return -1 and therefore could not symbolize stripped
debuginfo with gnu-debuglink.
Steps to reproduce:
$g++ --version
output:
g++ (GCC) 9.0.0 20180606 (experimental)
$cat test.cc
int main () { int *ptr = new int[1]; return ptr[1]; }
$g++ -o test test.cc -fsanitize=address -g
$objcopy --only-keep-debug test test.debug
$strip -g test
$objcopy --add-gnu-debuglink=test.debug test
./test
output:
...
#0 0x4007af in main (/path/to/exe/test+0x4007af)
...
The backtrace is not symbolized.
Possible patch is attached.
>From gcc-bugs-return-606778-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 14:22:20 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/30373] Option for run-time checking for aliasing amoung dummy arguments
Date: Fri, 08 Jun 2018 14:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30373
Jürgen Reuter <juergen.reuter at desy dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |juergen.reuter at desy dot de
--- Comment #2 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Stumbled over this via c.l.f. Reconfirmed with latest trunk (r260633). However,
neither ifort nor NAG nor PGI detect any violation of the aliasing rules at run
time. Of course, this is desirable, but somehow it looks questionable whether
anybody puts this ever high enough on his or her priority list.
>From gcc-bugs-return-606779-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 14:31:14 2018
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From: "vasili.burdo at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86091] New: [fold expression] Slow compile time and high memory usage compared to initializer_list folds
Date: Fri, 08 Jun 2018 14:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86091
Bug ID: 86091
Summary: [fold expression] Slow compile time and high memory
usage compared to initializer_list folds
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vasili.burdo at gmail dot com
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Created attachment 44253
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44253&action=edit
Test program
Consider test program in attachment.
This program tries to validate large (1000 entries) user-defined literal using
c++17 fold expression - and its compile time is VERY slow.
For c++ version earlier than c++17 fold is emulated using intitalizer_list - in
this case compile time is MUCH better.
Please note execution times and memory usage reported by `time' in invocation
examples below.
When compiled with command line (buggy behavior)
"/usr/bin/time -v g++ -std=gnu++1z -Wall -Wextra -D BUG test.cpp" its output
is:
----------------------------------------------------------
Command being timed: "g++ -std=gnu++1z -Wall -Wextra -D BUG test.cpp"
User time (seconds): 30.40
System time (seconds): 1.72
Percent of CPU this job got: 99%
Elapsed (wall clock) time (h:mm:ss or m:ss): 0:32.12
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 6760368
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 0
Minor (reclaiming a frame) page faults: 1690547
Voluntary context switches: 13
Involuntary context switches: 42
Swaps: 0
File system inputs: 0
File system outputs: 136
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
----------------------------------------------------------
When compiled with command line (no `BUG' defined)
"/usr/bin/time -v g++ -std=gnu++1z -Wall -Wextra test.cpp" its output is:
----------------------------------------------------------
Command being timed: "g++ -std=gnu++1z -Wall -Wextra test.cpp"
User time (seconds): 0.14
System time (seconds): 0.02
Percent of CPU this job got: 99%
Elapsed (wall clock) time (h:mm:ss or m:ss): 0:00.16
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 47784
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 0
Minor (reclaiming a frame) page faults: 13603
Voluntary context switches: 12
Involuntary context switches: 5
Swaps: 0
File system inputs: 0
File system outputs: 880
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
----------------------------------------------------------
Compiler version (official Ubuntu GCC):
----------------------------------------------------------
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 7.3.0-16ubuntu3'
--with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --with-as=/usr/bin/x86_64-linux-gnu-as
--with-ld=/usr/bin/x86_64-linux-gnu-ld --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)
----------------------------------------------------------
OS Version:
----------------------------------------------------------
Linux epbyminw0019t2 4.15.0-22-generic #24-Ubuntu SMP Wed May 16 12:15:17 UTC
2018 x86_64 x86_64 x86_64 GNU/Linux
----------------------------------------------------------
I tried multiple GCC versions starting from 5.3 to 8.0.0 on Ubuntu and Windows
(MINGW) all of them have the same problem.
>From gcc-bugs-return-606780-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 14:46:27 2018
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From: "srinivas.sundar at vvdntech dot in" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86092] New: global constant pointer optimization
Date: Fri, 08 Jun 2018 14:46:00 -0000
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Bug ID: 86092
Summary: global constant pointer optimization
Product: gcc
Version: 5.3.0
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Here is my sample kernel code. which works fine in gcc-4, had an issue with
gcc-5. I get both the print even if I allocate the dynamic memory to
kern_buff_p.
Disassemble of code gives the constant variable is optimized in the If
statement. Can you provide me any FLAG to disable this optimization with this
constant pointers.
static char* const kern_buff_p;
static int __init hello_start(void)
{
if(!kern_buff_p)
printk(KERN_INFO "buffer is NULL for first time \n");
*((char**)(unsigned long
int)((&kern_buff_p)))=kmalloc(KERN_BUF_SIZE,GFP_KERNEL);
if(!kern_buff_p)
printk(KERN_INFO "buffer is NULL for second time \n");
}
>From gcc-bugs-return-606781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 15:16:04 2018
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Subject: [Bug target/82805] [7/8/9 Regression] SPEC CPU2006 454.calculix ~6% performance deviation in between 6.3 and 7.2
Date: Fri, 08 Jun 2018 15:16:00 -0000
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Martin Jambor <jamborm at gcc dot gnu.org> ---
According to my latest GCC 8 measurements, we have caught up at some point in
the final stages of GCC 8 development and in all but one option combination are
noticeably faster than GCC 6. In the only case where we aren't (-O2 and
generic march/mtune), we are not really slower (only 1%). So I'd consider this
FIXED.
>From gcc-bugs-return-606783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 15:16:09 2018
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Subject: [Bug other/84613] [meta-bug] SPEC compiler performance issues
Date: Fri, 08 Jun 2018 15:16:00 -0000
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Bug 84613 depends on bug 82805, which changed state.
Bug 82805 Summary: [7/8/9 Regression] SPEC CPU2006 454.calculix ~6% performance deviation in between 6.3 and 7.2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82805
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-606782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 15:16:05 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
Date: Fri, 08 Jun 2018 15:16:00 -0000
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Bug 26163 depends on bug 82805, which changed state.
Bug 82805 Summary: [7/8/9 Regression] SPEC CPU2006 454.calculix ~6% performance deviation in between 6.3 and 7.2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82805
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
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Subject: [Bug target/85755] PowerPC Gcc's -mupdate produces inefficient code on power8/power9 machines
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Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL|https://gcc.gnu.org/ml/gcc- |https://gcc.gnu.org/ml/gcc-
|patches/2018-06/msg00421.ht |patches/2018-06/msg00482.ht
|ml |ml
--- Comment #6 from Peter Bergner <bergner at gcc dot gnu.org> ---
Updated patch submitted.
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Subject: [Bug c/86092] global constant pointer optimization
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
static char* const kern_buff_p;
You told the compiler it is constant and won't change values and then you
changed the value behind its back. I think the kernel has a write once
attribute instead.
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
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Target Milestone|--- |9.0
Summary|ICE in get_string_length, |[9 Regression] ICE in
|at tree-ssa-strlen.c:653 |get_string_length, at
| |tree-ssa-strlen.c:653
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Subject: [Bug c/86092] global constant pointer optimization
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--- Comment #2 from Srinivas Achary <srinivas.sundar at vvdntech dot in> ---
Sorry that I am new to this.....
Is there any possibility to make this code work, without changing the variable
attribute. GCC-4 has no issue with this code. What special flags have been
included in the GCC-5.
During disassemble the
if(!kern_buff_p)
--
is changed to
if x0 is kern_buff_p
mov x0, #0
This should be
mov x0,[x0]
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Srinivas Achary <srinivas.sundar at vvdntech dot in> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Srinivas Achary <srinivas.sundar at vvdntech dot in> ---
I have tried disabling all ipa FLAGS
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Subject: [Bug c/86092] global constant pointer optimization
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Srinivas Achary from comment #2)
> Is there any possibility to make this code work,
Remove the 'const', or add 'volatile'.
> without changing the variable attribute.
-O0
> GCC-4 has no issue with this code. What special flags
> have been included in the GCC-5.
We don't add a new flag for every little optimization that might break invalid
code.
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Subject: [Bug c/86093] New: volatile ignored on pointer in C
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Bug ID: 86093
Summary: volatile ignored on pointer in C
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extern char*volatile i;
int f(){return i-i;}
gets simplified in C as 1 load and return 0. In C++ or if i has a non-pointer
type (say int), we do have 2 loads and a subtraction.
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Subject: [Bug sanitizer/86090] [ASAN] ASAN does not properly configure libbacktrace.
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Patches should be posted to gcc-patches mailing list.
You could as well add the lstat and readlink to the same AC_CHECK_FUNCS as the
other functions, no need for two AC_CHECK_FUNCS. LGTM otherwise.
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From: "srinivas.sundar at vvdntech dot in" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86092] global constant pointer optimization
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--- Comment #5 from Srinivas Achary <srinivas.sundar at vvdntech dot in> ---
thank you Marc.
What I have shown here is just an example sample code. But I have code which
makes use of kern_buff_p variable in many place.If I use volatile that might
reduce my code speed.
Any how the kern_buff_p initial value is NULL
and the variable have been allocated the memory during runtime without any
issue.
The problem is during compilation, the compiler optimizes all my conditional
statements used with this constant pointers. Due to this, I am not able to run
my code in New machines.
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Subject: [Bug c/86093] [8/9 Regression] volatile ignored on pointer in C
Date: Fri, 08 Jun 2018 17:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86093
Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-08
CC| |amonakov at gcc dot gnu.org
Known to work| |7.3.0
Summary|volatile ignored on pointer |[8/9 Regression] volatile
|in C |ignored on pointer in C
Ever confirmed|0 |1
Known to fail| |8.1.0, 9.0
--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
gcc-7 got this right.
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Subject: [Bug target/85755] PowerPC Gcc's -mupdate produces inefficient code on power8/power9 machines
Date: Fri, 08 Jun 2018 17:18:00 -0000
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--- Comment #7 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Fri Jun 8 17:17:45 2018
New Revision: 261340
URL: https://gcc.gnu.org/viewcvs?rev=261340&root=gcc&view=rev
Log:
gcc/
PR target/85755
* config/rs6000/rs6000.c (mem_operand_gpr): Enable PRE_INC and PRE_DEC
addresses.
gcc/testsuite/
PR target/85755
* gcc.target/powerpc/pr85755.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr85755.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/63327] Poor caret location in error mesage
Date: Fri, 08 Jun 2018 17:34:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P5
CC| |kargl at gcc dot gnu.org
--- Comment #5 from kargl at gcc dot gnu.org ---
Add note to close PR in 2 years when I cycle back through.
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86094] New: [8/9 Regression] Call ABI changed for small objects with defaulted ctor
Date: Fri, 08 Jun 2018 18:01:00 -0000
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Bug ID: 86094
Summary: [8/9 Regression] Call ABI changed for small objects
with defaulted ctor
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ABI, wrong-code
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When compiling the following with -O2 -std=c++11:
struct S {
S(S&&) = default;
int i;
};
S foo(S s)
{
return s;
}
gcc-7 and earlier emit
_Z3foo1S:
movl %edi, %eax
ret
but gcc-8 and trunk emit
_Z3foo1S:
movl (%rsi), %edx
movq %rdi, %rax
movl %edx, (%rdi)
ret
i.e. the object is now passed in memory rather than on register. This appears
to be a silent ABI change.
(Clang generates the same code as gcc-7)
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Subject: [Bug fortran/85631] [8/9 Regression] Runtime error message array bound mismatch with nonzero optimization
Date: Fri, 08 Jun 2018 18:01:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |27766
--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
The bouns checking is inserted in the wrong place, before
setting the descriptor:
$ cat b.f90
module x
contains
subroutine sub(a)
real, dimension(:,:), intent(in) :: a
real, allocatable, dimension(:,:) :: var_1_mma
var_1_mma = transpose(a)
end subroutine sub
end module x
program main
use x
implicit none
real, dimension(:,:), allocatable :: block_1
block_1 = reshape([-2,3,-5,7], [2,2])
call sub(block_1)
end program
$ grep mma b.f90.003t.original
struct array02_real(kind=4) var_1_mma;
var_1_mma.data = 0B;
D.3809 = (real(kind=4)[0:] * restrict) var_1_mma.data;
D.3810 = var_1_mma.offset;
D.3811 = var_1_mma.dim[0].lbound;
D.3812 = var_1_mma.dim[0].ubound;
D.3813 = var_1_mma.dim[1].lbound;
D.3814 = var_1_mma.dim[1].ubound;
if ((integer(kind=8)) (D.3811 <= D.3812 && var_1_mma.dim[0].lbound >
D.3811))
_gfortran_runtime_error_at (&"At line 6 of file b.f90"[1]{lb: 1 sz:
1}, &"Index \'%ld\' of dimension 1 of array \'var_1_mma\' outside of expected
range (%ld:%ld)"[1]{lb: 1 sz: 1}, D.3811, var_1_mma.dim[0].lbound,
var_1_mma.dim[0].ubound);
...
var_1_mma.dim[0].lbound = 1;
var_1_mma.dim[0].ubound = NON_LVALUE_EXPR <D.3807>;
var_1_mma.dim[0].stride = 1;
var_1_mma.dim[1].lbound = 1;
var_1_mma.dim[1].ubound = NON_LVALUE_EXPR <D.3808>;
var_1_mma.dim[1].stride = NON_LVALUE_EXPR <D.3807>;
As a matter of fact, we are taking the variables from
the assignmemt, there should be no checking at all.
Hmm...
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=27766
[Bug 27766] [meta-bug] -fbounds-check related bugs
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From: "gianni at scaramanga dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/85960] -fipa-pta and ifunc are incompatible
Date: Fri, 08 Jun 2018 18:41:00 -0000
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--- Comment #10 from Gianni Tedesco <gianni at scaramanga dot co.uk> ---
Confirmed. Code from trunk works splendidly on the code-base where this bug was
discovered.
>From gcc-bugs-return-606799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 18:54:20 2018
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/63514] functions containing volatile are considered pure
Date: Fri, 08 Jun 2018 18:54:00 -0000
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--- Comment #5 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Fri, Jun 08, 2018 at 03:40:40AM +0000, kargl at gcc dot gnu.org wrote:
> There is, however, a bug with respect to F2018:
>
> C1588 A local variable of a pure subprogram, or of a BLOCK construct
> within a pure subprogram, shall not have the SAVE or VOLATILE attribute.
>
A patch for the above has been submitted.
https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00492.html
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Subject: [Bug fortran/78571] ICE in create_character_initializer, at fortran/data.c:191
Date: Fri, 08 Jun 2018 19:06:00 -0000
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--- Comment #2 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Fri Jun 8 19:06:20 2018
New Revision: 261343
URL: https://gcc.gnu.org/viewcvs?rev=261343&root=gcc&view=rev
Log:
2018-06-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78571
* data.c (create_character_initializer): Return early if type is
incompatible with CHARACTER.
2018-06-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78571
* gfortran.dg/pr78571.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr78571.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/data.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/86059] ICE in reduce_binary_ac, at fortran/arith.c:1308 (and others)
Date: Fri, 08 Jun 2018 19:11:00 -0000
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--- Comment #2 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Fri Jun 8 19:11:21 2018
New Revision: 261344
URL: https://gcc.gnu.org/viewcvs?rev=261344&root=gcc&view=rev
Log:
2018-06-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86059
* array.c (match_array_cons_element): NULL() cannot be in an
array constructor.
2018-06-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86059
* gfortran.dg/associate_30.f90: Remove code tested ...
* gfortran.dg/pr67803.f90: Ditto.
* gfortran.dg/pr67805.f90: Ditto.
* gfortran.dg/pr86059.f90: ... here. New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr86059.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/array.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/associate_30.f90
trunk/gcc/testsuite/gfortran.dg/pr67803.f90
trunk/gcc/testsuite/gfortran.dg/pr67805.f90
>From gcc-bugs-return-606802-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 19:39:28 2018
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Subject: [Bug fortran/78278] ICE in gfc_wide_memset, at fortran/scanner.c:153
Date: Fri, 08 Jun 2018 19:39:00 -0000
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kargl at gcc dot gnu.org changed:
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CC| |kargl at gcc dot gnu.org
--- Comment #6 from kargl at gcc dot gnu.org ---
(In reply to Gerhard Steinmetz from comment #0)
> Down to at least 4.8 :
>
> $ cat z1.f90
> program p
> character, pointer :: x => null()
> data x /null()/
> end
>
> $ gfortran-7-20161106 z1.f90
> f951: internal compiler error: Segmentation fault
> 0xc3a64f crash_signal
> ../../gcc/toplev.c:338
> 0x700690 gfc_wide_memset(unsigned int*, unsigned int, unsigned long)
> ../../gcc/fortran/scanner.c:153
> 0x67741d create_character_initializer
> ../../gcc/fortran/data.c:195
> 0x67741d gfc_assign_data_value(gfc_expr*, gfc_expr*, __mpz_struct*,
> __mpz_struct (*) [1])
> ../../gcc/fortran/data.c:488
> 0x6f12a9 check_data_variable
> ../../gcc/fortran/resolve.c:15001
> 0x6f12a9 traverse_data_var
> ../../gcc/fortran/resolve.c:15130
> 0x6fbc91 resolve_data
> ../../gcc/fortran/resolve.c:15185
> 0x6fbc91 resolve_types
> ../../gcc/fortran/resolve.c:15939
> 0x6f76ac gfc_resolve(gfc_namespace*)
> ../../gcc/fortran/resolve.c:16027
> 0x6e1bba resolve_all_program_units
> ../../gcc/fortran/parse.c:5883
> 0x6e1bba gfc_parse_file()
> ../../gcc/fortran/parse.c:6130
> 0x725822 gfc_be_parse_file
> ../../gcc/fortran/f95-lang.c:198
This now compiles with trunk. I cannot force the
error message with -std=f95 (or any other -std= option).
>From gcc-bugs-return-606803-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 19:59:30 2018
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Subject: [Bug target/82092] [8/9 regression] gcc fails to link genmodes on darwin (cfiStartsArray[i] != cfiStartsArray[i-1])
Date: Fri, 08 Jun 2018 19:59:00 -0000
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--- Comment #15 from Ryan Schmidt <gcc at ryandesign dot com> ---
Yes, I noticed Homebrew had the update, and I didn't understand why it worked
there. But now I do.
Some more information has turned up in a new MacPorts ticket:
https://trac.macports.org/ticket/56521
In MacPorts gcc ports, we use --with-as=/opt/local/bin/as (this assembler is
provided by our cctools port). This change was made in MacPorts 6 years ago by
Jeremy who reported this bug, though I'm not entirely sure why.
I suspect the problem is that our cctools port is currently at version 895,
which corresponds to what's in Xcode 8.1, and that's apparently too old to work
properly in this case. I am able to get a more recent snapshot to build if I
instead use --with-as=/usr/bin/as, so perhaps we either need to do that in
MacPorts or we need to update our cctools port to a more recent version.
>From gcc-bugs-return-606804-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 20:58:38 2018
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Subject: [Bug other/86095] New: stale documentation for -Wunsafe-loop-optimizations
Date: Fri, 08 Jun 2018 20:58:00 -0000
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Bug ID: 86095
Summary: stale documentation for -Wunsafe-loop-optimizations
Product: gcc
Version: 8.1.0
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For the man page shipped with 8.1.0, the description of
-Wunsafe-loop-optimizations still references the -funsafe-loop-optimizations
option, however that optimization is neither described nor referenced anywhere
else in the documentation.
I dug up https://gcc.gnu.org/ml/gcc-patches/2016-07/threads.html#00956, which
seems to indicate the option was removed. It does not appear however that the
documentation for the warning was updated to reflect this (nor was Richard's
suggested alias added, which may have also cleared up confusion).
>From gcc-bugs-return-606805-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 22:04:48 2018
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Subject: [Bug fortran/85631] [8/9 Regression] Runtime error message array bound mismatch with nonzero optimization
Date: Fri, 08 Jun 2018 22:04:00 -0000
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Fri Jun 8 22:04:11 2018
New Revision: 261348
URL: https://gcc.gnu.org/viewcvs?rev=261348&root=gcc&view=rev
Log:
2018-06-08 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/85631
* trans.h (gfc_ss): Add field no_bounds_check.
* trans-array.c (gfc_conv_ss_startstride): If flag_realloc_lhs and
ss->no_bounds_check is set, do not use runtime checks.
* trans-expr.c (gfc_trans_assignment_1): Set lss->no_bounds_check
for reallocatable lhs.
2018-06-08 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/85631
* gfortran.dg/bounds_check_20.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/bounds_check_20.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans.h
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 22:06:29 2018
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Subject: [Bug other/86095] stale documentation for -Wunsafe-loop-optimizations
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |documentation
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-08
CC| |egallager at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-606807-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 08 23:21:58 2018
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Subject: [Bug libffi/84410] libffi doesn't support riscv now, but not disabled in configure.ac
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Jim Wilson <wilson at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jim Wilson <wilson at gcc dot gnu.org> ---
libffi builds now, and so does libgo compiler. So fixed for GCC 9.
>From gcc-bugs-return-606808-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 00:47:00 2018
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Subject: [Bug fortran/46783] [OOP] TRANSFER with polymorphic MOLDDate: Sat, 09 Jun 2018 00:46:00 -0000
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kargl at gcc dot gnu.org changed:
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--- Comment #4 from kargl at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #3)
> > Updated link
> >
> > http://mailman.j3-fortran.org/pipermail/j3/2010-December/004026.html
>
> Broken again!-(
>
> And I cannot find anything relevant in
>
> https://mailman.j3-fortran.org/doc/year/10
>
> AFAICT the situation has not changed in F2018.
>
> What should we do with this PR?
All of the URLs are broken in this PR.
Without a testcase that demonstrates the bug,
this PR is useless. Closing.
>From gcc-bugs-return-606809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 00:47:00 2018
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Subject: [Bug fortran/31237] [meta-bug] TRANSFER intrinsic
Date: Sat, 09 Jun 2018 00:47:00 -0000
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Bug 31237 depends on bug 46783, which changed state.
Bug 46783 Summary: [OOP] TRANSFER with polymorphic MOLD=
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46783
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WONTFIX
>From gcc-bugs-return-606810-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 01:27:55 2018
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/86070] [7 regression] gfortran.dg/fmt_zero_digits.f90 segmentation fault starting with r261077
Date: Sat, 09 Jun 2018 01:27:00 -0000
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--- Comment #2 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Well I am not seeing this on gcc112, so will try on gcc110. Bill were your
tests on a gcc compile farm machine?
>From gcc-bugs-return-606811-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 03:06:25 2018
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/86096] New: ICE: qsort checking failed (error: qsort comparator non-negative on sorted output: 0)
Date: Sat, 09 Jun 2018 03:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86096
Bug ID: 86096
Summary: ICE: qsort checking failed (error: qsort comparator
non-negative on sorted output: 0)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-checking, ice-on-invalid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: powerpc-*-linux-gnu*
Created attachment 44254
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44254&action=edit
Reduced testcase
gcc-9.0.0-alpha20180603 snapshot (r261132) ICEs when compiling the attached
snippet w/ -misel -Os -floop-parallelize-all -frename-registers
-fno-caller-saves -fno-gcse -fno-isolate-erroneous-paths-dereference
-fno-split-wide-types -fno-tree-dominator-opts -fno-tree-vrp -g:
% powerpc-e300c3-linux-gnu-gcc-9.0.0-alpha20180603 -misel -Os
-floop-parallelize-all -frename-registers -fno-caller-saves -fno-gcse
-fno-isolate-erroneous-paths-dereference -fno-split-wide-types
-fno-tree-dominator-opts -fno-tree-vrp -g -c layafnq7.c
layafnq7.c: In function 'os':
layafnq7.c:43:1: error: qsort comparator non-negative on sorted output: 0
}
^
during RTL pass: rnreg
layafnq7.c:43:1: internal compiler error: qsort checking failed
0x58cb34 qsort_chk_error
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/vec.c:201
0x15576f9 qsort_chk(void*, unsigned long, unsigned long, int (*)(void const*,
void const*))
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/vec.c:253
0x7b406a vec<df_mw_hardreg*, va_heap, vl_embed>::qsort(int (*)(void const*,
void const*))
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/vec.h:1099
0x7b406a vec<df_mw_hardreg*, va_heap, vl_ptr>::qsort(int (*)(void const*, void
const*))
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/vec.h:1862
0x7b406a df_sort_and_compress_mws
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/df-scan.c:2252
0x7b406a df_canonize_collection_rec
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/df-scan.c:2281
0x7b65cd df_insn_refs_collect
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/df-scan.c:3223
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/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/df-scan.c:4082
0x7b892f df_insn_rescan(rtx_insn*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/df-scan.c:1065
0x7bad9c df_process_deferred_rescans()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/df-scan.c:1246
0x7a175f df_finish_pass(bool)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/df-core.c:651
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Subject: [Bug fortran/85839] [F2018] warn for obsolescent features
Date: Sat, 09 Jun 2018 08:06:00 -0000
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--- Comment #3 from janus at gcc dot gnu.org ---
(In reply to janus from comment #0)
> * specific names for standard intrinsic functions
After r260705, only this one is still missing.
>From gcc-bugs-return-606813-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 09:17:58 2018
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Subject: [Bug fortran/85088] improve diagnostic for bad INTENT declaration ('Invalid character in name at')
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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Target Milestone|8.2 |9.0
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/86096] ICE: qsort checking failed (error: qsort comparator non-negative on sorted output: 0)
Date: Sat, 09 Jun 2018 10:59:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |amonakov at gcc dot gnu.org
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--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
df_mw_compare has:
if (mw1->mw_reg != mw2->mw_reg)
return mw1->mw_order - mw2->mw_order;
Note mw_reg in the 'if' vs mw_order in the 'return'. This is invalid.
It's simpler and more efficient to just use mw_order as the last tie-breaker
regardless of mw_reg value.
>From gcc-bugs-return-606815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 13:01:04 2018
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86097] New: [9 Regression] ICE: verify_gimple failed (error: mismatching comparison operand types)
Date: Sat, 09 Jun 2018 13:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86097
Bug ID: 86097
Summary: [9 Regression] ICE: verify_gimple failed (error:
mismatching comparison operand types)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
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gcc-9.0.0-alpha20180603 snapshot (r261132) ICEs when compiling the following
snippet w/ -O2 (-O3, -Ofast) -ftree-parallelize-loops=2 -fno-tree-dce:
int rp, vd;
void
p5 (int cd)
{
while (cd != 0)
{
for (rp = 0; rp < 4; ++rp)
for (vd = 0; vd < 1; ++vd)
{
g0:
;
}
++rp;
}
while (rp < 2)
{
for (cd = 0; cd < 1; ++cd)
for (rp = 1; rp != 0; ++rp)
{
}
++rp;
}
if (cd != 0)
goto g0;
}
% gcc-9.0.0-alpha20180603 -O2 -ftree-parallelize-loops=2 -fno-tree-dce -w -c
ipszbgfg.c
ipszbgfg.c: In function 'p5':
ipszbgfg.c:4:1: error: mismatching comparison operand types
p5 (int cd)
^~
signed int
unsigned int
if (ivtmp_32 < 3)
during GIMPLE pass: parloops
ipszbgfg.c:4:1: internal compiler error: verify_gimple failed
0xce3929 verify_gimple_in_cfg(function*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/tree-cfg.c:5401
0xbbecff execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/passes.c:1994
0xbbfc4e execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/passes.c:2048
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From: "eric.niebler at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86098] New: [concepts] canonical types differ for identical types
Date: Sat, 09 Jun 2018 13:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86098
Bug ID: 86098
Summary: [concepts] canonical types differ for identical types
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: eric.niebler at gmail dot com
Target Milestone: ---
Compile with -std=c++2a -O3 -fconcepts
namespace std {
template <class _Res> class future;
template <class _Res> class promise;
}
template <class T>
T&& declval() requires true;
template <class T>
void declval();
template<template <class...> class T>
struct construct_deduced {
template <class... AN>
using deduced_t = decltype(T{declval<AN>()...});
template<class... AN>
requires requires {typename deduced_t<AN...>;}
auto operator()(AN&&... an) const {
return T{(AN&&)an...};
}
};
template <class A>
concept bool Foo = true;
template<class T, class Out>
requires Foo<std::promise<T>>
std::future<T> future_from(Out singleSender);
Result:
<source>:26:29: internal compiler error: canonical types differ for identical
types '_Res' and 'T'
requires Foo<std::promise<T>>
^
mmap: Invalid argument
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1
See https://godbolt.org/g/4HkFdn
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Subject: [Bug fortran/85631] [8/9 Regression] Runtime error message array bound mismatch with nonzero optimization
Date: Sat, 09 Jun 2018 14:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85631
--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sat Jun 9 14:15:53 2018
New Revision: 261359
URL: https://gcc.gnu.org/viewcvs?rev=261359&root=gcc&view=rev
Log:
2018-06-09 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/85631
Backport from trunk.
* trans.h (gfc_ss): Add field no_bounds_check.
* trans-array.c (gfc_conv_ss_startstride): If flag_realloc_lhs and
ss->no_bounds_check is set, do not use runtime checks.
* trans-expr.c (gfc_trans_assignment_1): Set lss->no_bounds_check
for reallocatable lhs.
2018-06-09 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/85631
Backport from trunk.
* gfortran.dg/bounds_check_20.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/bounds_check_20.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/trans-array.c
branches/gcc-8-branch/gcc/fortran/trans-expr.c
branches/gcc-8-branch/gcc/fortran/trans.h
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/85631] [8/9 Regression] Runtime error message array bound mismatch with nonzero optimization
Date: Sat, 09 Jun 2018 14:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85631
--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed, closing.
Thanks for the bug report!
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Subject: [Bug fortran/60370] TRANSPOSE on rhs of allocatable array assignment gives error with -fcheck=bounds
Date: Sat, 09 Jun 2018 14:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60370
Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed by r261348.
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Subject: [Bug fortran/85631] [8/9 Regression] Runtime error message array bound mismatch with nonzero optimization
Date: Sat, 09 Jun 2018 15:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85631
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Fixed, closing.
Really closing!-) Thanks for the fix.
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Subject: [Bug fortran/27766] [meta-bug] -fbounds-check related bugs
Date: Sat, 09 Jun 2018 15:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=27766
Bug 27766 depends on bug 85631, which changed state.
Bug 85631 Summary: [8/9 Regression] Runtime error message array bound mismatch with nonzero optimization
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85631
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/63514] functions containing volatile are considered pure
Date: Sat, 09 Jun 2018 15:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63514
--- Comment #6 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 15:33:28 2018
New Revision: 261360
URL: https://gcc.gnu.org/viewcvs?rev=261360&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/63514
* symbol.c (gfc_add_volatile): Enforce F2008:C1282 and F2018:C1588.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/63514
* gfortran.dg/pr63514.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr63514.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/symbol.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/78278] ICE in gfc_wide_memset, at fortran/scanner.c:153
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78278
--- Comment #7 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 15:39:29 2018
New Revision: 261361
URL: https://gcc.gnu.org/viewcvs?rev=261361&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78278
* data.c (gfc_assign_data_value): Re-arrange code to allow for
an error for double initialization of CHARACTER entities.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78278
* gfortran.dg/data_bounds_1.f90: Add -std=gnu option.
* gfortran.dg/data_char_1.f90: Ditto.
* gfortran.dg/pr78571.f90: Ditto.
* gfortran.dg/pr78278.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr78278.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/data.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/data_bounds_1.f90
trunk/gcc/testsuite/gfortran.dg/data_char_1.f90
trunk/gcc/testsuite/gfortran.dg/pr78571.f90
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Subject: [Bug fortran/85996] [8/9 Regression] ICE: gfc_trans_select(): Bad type for case expr.
Date: Sat, 09 Jun 2018 15:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85996
--- Comment #9 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 15:47:40 2018
New Revision: 261362
URL: https://gcc.gnu.org/viewcvs?rev=261362&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* decl.c (gfc_match_char_spec): Use private namespace in attempt to
reduce a charlen to a constant.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* gfortran.dg/pr85138_1.f90: New test.
* gfortran.dg/pr85138_2.f90: Ditto.
* gfortran.dg/pr85996.f90: Ditto.
Added:
trunk/gcc/testsuite/gfortran.dg/pr85138_1.f90
trunk/gcc/testsuite/gfortran.dg/pr85138_2.f90
trunk/gcc/testsuite/gfortran.dg/pr85996.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/86051] internal compiler error: in conv_function_val, at fortran/trans-expr.c:3717
Date: Sat, 09 Jun 2018 15:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86051
--- Comment #5 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 15:47:40 2018
New Revision: 261362
URL: https://gcc.gnu.org/viewcvs?rev=261362&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* decl.c (gfc_match_char_spec): Use private namespace in attempt to
reduce a charlen to a constant.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* gfortran.dg/pr85138_1.f90: New test.
* gfortran.dg/pr85138_2.f90: Ditto.
* gfortran.dg/pr85996.f90: Ditto.
Added:
trunk/gcc/testsuite/gfortran.dg/pr85138_1.f90
trunk/gcc/testsuite/gfortran.dg/pr85138_2.f90
trunk/gcc/testsuite/gfortran.dg/pr85996.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/85138] [8/9 regression] ICE with generic function
Date: Sat, 09 Jun 2018 15:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85138
--- Comment #13 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 15:47:40 2018
New Revision: 261362
URL: https://gcc.gnu.org/viewcvs?rev=261362&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* decl.c (gfc_match_char_spec): Use private namespace in attempt to
reduce a charlen to a constant.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* gfortran.dg/pr85138_1.f90: New test.
* gfortran.dg/pr85138_2.f90: Ditto.
* gfortran.dg/pr85996.f90: Ditto.
Added:
trunk/gcc/testsuite/gfortran.dg/pr85138_1.f90
trunk/gcc/testsuite/gfortran.dg/pr85138_2.f90
trunk/gcc/testsuite/gfortran.dg/pr85996.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 15:59:00 2018
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Subject: [Bug fortran/38351] Poor error message for rank mismatch in operator args
Date: Sat, 09 Jun 2018 15:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38351
--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 15:58:24 2018
New Revision: 261363
URL: https://gcc.gnu.org/viewcvs?rev=261363&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/38351
* resolve.c (resolve_operator): Provide better error message for
derived type entity used in an binary intrinsic numeric operator.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/38351
* gfortran.dg/pr38351.f90: New test.
* gfortran.dg/typebound_operator_4.f03: Adjust for new error message.
Added:
trunk/gcc/testsuite/gfortran.dg/pr38351.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/typebound_operator_4.f03
>From gcc-bugs-return-606828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 16:47:01 2018
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/63327] Poor caret location in error mesage
Date: Sat, 09 Jun 2018 16:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63327
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #6 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #2)
> See also pr54224 comment 22 for other examples: Manuel López-Ibáñez wrote
>
> > You will get a more precise column info (and better location for '^')
> > if Fortran gives a more precise DECL_SOURCE_LOCATION() when generating
> > this tree.
>
The approach attempted in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54224#c29
could work if care is taken to not generate invalid locations. Also, David has
added new functions to line-map.h to dynamically generate locations.
However, in this case and other cases, the location of the error may be taken
from input_location or from a gimple location and not from
DECL_SOURCE_LOCATION().
Moreover, in this case, the bug seems to be caused by the continuation (&).
This seems totally different from the wrong locations in PR54224.
>From gcc-bugs-return-606829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 17:20:38 2018
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/86070] [7 regression] gfortran.dg/fmt_zero_digits.f90 segmentation fault starting with r261077
Date: Sat, 09 Jun 2018 17:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86070
--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
I am seeing a memory issue with valgrind....investigating
>From gcc-bugs-return-606830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 17:35:37 2018
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Subject: [Bug fortran/78571] ICE in create_character_initializer, at fortran/data.c:191
Date: Sat, 09 Jun 2018 17:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78571
--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 17:34:59 2018
New Revision: 261364
URL: https://gcc.gnu.org/viewcvs?rev=261364&root=gcc&view=rev
Log:
2018-06-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78571
* data.c (create_character_initializer): Return early if type is
incompatible with CHARACTER.
2018-06-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78571
* gfortran.dg/pr78571.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr78571.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/data.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/38351] Poor error message for rank mismatch in operator args
Date: Sat, 09 Jun 2018 17:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38351
--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 17:38:24 2018
New Revision: 261365
URL: https://gcc.gnu.org/viewcvs?rev=261365&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/38351
* resolve.c (resolve_operator): Provide better error message for
derived type entity used in an binary intrinsic numeric operator.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/38351
* gfortran.dg/pr38351.f90: New test.
* gfortran.dg/typebound_operator_4.f03: Adjust for new error message.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr38351.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/resolve.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/typebound_operator_4.f03
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Subject: [Bug fortran/78278] ICE in gfc_wide_memset, at fortran/scanner.c:153
Date: Sat, 09 Jun 2018 17:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78278
--- Comment #8 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 17:46:07 2018
New Revision: 261366
URL: https://gcc.gnu.org/viewcvs?rev=261366&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78278
Committed as part of r261364
* data.c (gfc_assign_data_value): Re-arrange code to allow for
an error for double initialization of CHARACTER entities.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78278
* gfortran.dg/data_bounds_1.f90: Add -std=gnu option.
* gfortran.dg/data_char_1.f90: Ditto.
* gfortran.dg/pr78278.f90: New test.
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/78278] ICE in gfc_wide_memset, at fortran/scanner.c:153
Date: Sat, 09 Jun 2018 17:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78278
--- Comment #9 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 17:47:06 2018
New Revision: 261367
URL: https://gcc.gnu.org/viewcvs?rev=261367&root=gcc&view=rev
Log:
Commit testcases ommitted in last commit.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78278
* gfortran.dg/data_bounds_1.f90: Add -std=gnu option.
* gfortran.dg/data_char_1.f90: Ditto.
* gfortran.dg/pr78278.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr78278.f90
Modified:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/data_bounds_1.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/data_char_1.f90
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Subject: [Bug fortran/63514] functions containing volatile are considered pure
Date: Sat, 09 Jun 2018 18:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63514
--- Comment #7 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 18:02:56 2018
New Revision: 261368
URL: https://gcc.gnu.org/viewcvs?rev=261368&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/63514
* symbol.c (gfc_add_volatile): Enforce F2008:C1282 and F2018:C1588.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/63514
* gfortran.dg/pr63514.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr63514.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/symbol.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/86059] ICE in reduce_binary_ac, at fortran/arith.c:1308 (and others)
Date: Sat, 09 Jun 2018 18:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86059
--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 18:06:04 2018
New Revision: 261369
URL: https://gcc.gnu.org/viewcvs?rev=261369&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86059
* array.c (match_array_cons_element): NULL() cannot be in an
array constructor.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86059
* gfortran.dg/associate_30.f90: Remove code tested ...
* gfortran.dg/pr67803.f90: Ditto.
* gfortran.dg/pr67805.f90: Ditto.
* gfortran.dg/pr86059.f90: ... here. New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr86059.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/array.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/associate_30.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr67803.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr67805.f90
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Subject: [Bug fortran/85996] [8/9 Regression] ICE: gfc_trans_select(): Bad type for case expr.
Date: Sat, 09 Jun 2018 18:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85996
--- Comment #10 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 18:09:00 2018
New Revision: 261370
URL: https://gcc.gnu.org/viewcvs?rev=261370&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* decl.c (gfc_match_char_spec): Use private namespace in attempt to
reduce a charlen to a constant.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* gfortran.dg/pr85138_1.f90: New test.
* gfortran.dg/pr85138_2.f90: Ditto.
* gfortran.dg/pr85996.f90: Ditto.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr85138_1.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr85138_2.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr85996.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/decl.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
Date: Sat, 09 Jun 2018 18:09:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-06-09
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
I cannot reproduce an ICE with a native Linux compiler or with an
x86_64-apple-darwin17 cross-compiler so there's probably something in the
Darwin headers that triggers it. Can you please attach a preprocessing
translation unit?
Line 653 has the following code:
651 /* BUILT_IN_CALLOC always has si->nonzero_chars set. */
652 default:
653 gcc_unreachable ();
654 break;
655 }
656 }
657
658 return si->nonzero_chars;
659 }
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Subject: [Bug fortran/85138] [8/9 regression] ICE with generic function
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--- Comment #14 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 18:09:00 2018
New Revision: 261370
URL: https://gcc.gnu.org/viewcvs?rev=261370&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* decl.c (gfc_match_char_spec): Use private namespace in attempt to
reduce a charlen to a constant.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* gfortran.dg/pr85138_1.f90: New test.
* gfortran.dg/pr85138_2.f90: Ditto.
* gfortran.dg/pr85996.f90: Ditto.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr85138_1.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr85138_2.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr85996.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/decl.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 18:09:38 2018
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Subject: [Bug fortran/86051] internal compiler error: in conv_function_val, at fortran/trans-expr.c:3717
Date: Sat, 09 Jun 2018 18:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86051
--- Comment #6 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 18:09:00 2018
New Revision: 261370
URL: https://gcc.gnu.org/viewcvs?rev=261370&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* decl.c (gfc_match_char_spec): Use private namespace in attempt to
reduce a charlen to a constant.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* gfortran.dg/pr85138_1.f90: New test.
* gfortran.dg/pr85138_2.f90: Ditto.
* gfortran.dg/pr85996.f90: Ditto.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr85138_1.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr85138_2.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr85996.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/decl.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606840-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 18:31:30 2018
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Subject: [Bug fortran/85138] [8/9 regression] ICE with generic function
Date: Sat, 09 Jun 2018 18:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85138
--- Comment #15 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 18:29:40 2018
New Revision: 261371
URL: https://gcc.gnu.org/viewcvs?rev=261371&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* decl.c (gfc_match_char_spec): Use private namespace in attempt to
reduce a charlen to a constant.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* gfortran.dg/pr85138_1.f90: New test.
* gfortran.dg/pr85138_2.f90: Ditto.
* gfortran.dg/pr85996.f90: Ditto.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr85138_1.f90
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr85138_2.f90
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr85996.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/decl.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606842-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 18:31:32 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86051] internal compiler error: in conv_function_val, at fortran/trans-expr.c:3717
Date: Sat, 09 Jun 2018 18:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86051
--- Comment #7 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 18:29:40 2018
New Revision: 261371
URL: https://gcc.gnu.org/viewcvs?rev=261371&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* decl.c (gfc_match_char_spec): Use private namespace in attempt to
reduce a charlen to a constant.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* gfortran.dg/pr85138_1.f90: New test.
* gfortran.dg/pr85138_2.f90: Ditto.
* gfortran.dg/pr85996.f90: Ditto.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr85138_1.f90
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr85138_2.f90
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr85996.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/decl.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 18:31:31 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85996] [8/9 Regression] ICE: gfc_trans_select(): Bad type for case expr.
Date: Sat, 09 Jun 2018 18:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85996
--- Comment #11 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 18:29:40 2018
New Revision: 261371
URL: https://gcc.gnu.org/viewcvs?rev=261371&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* decl.c (gfc_match_char_spec): Use private namespace in attempt to
reduce a charlen to a constant.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* gfortran.dg/pr85138_1.f90: New test.
* gfortran.dg/pr85138_2.f90: Ditto.
* gfortran.dg/pr85996.f90: Ditto.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr85138_1.f90
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr85138_2.f90
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr85996.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/decl.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606845-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 18:36:36 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86051] internal compiler error: in conv_function_val, at fortran/trans-expr.c:3717
Date: Sat, 09 Jun 2018 18:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86051
--- Comment #8 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 18:35:58 2018
New Revision: 261372
URL: https://gcc.gnu.org/viewcvs?rev=261372&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* decl.c (gfc_match_char_spec): Use private namespace in attempt to
reduce a charlen to a constant.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* gfortran.dg/pr85138_1.f90: New test.
* gfortran.dg/pr85138_2.f90: Ditto.
* gfortran.dg/pr85996.f90: Ditto.
Added:
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/pr85138_1.f90
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/pr85138_2.f90
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/pr85996.f90
Modified:
branches/gcc-6-branch/gcc/fortran/ChangeLog
branches/gcc-6-branch/gcc/fortran/decl.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 18:36:35 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85996] [8/9 Regression] ICE: gfc_trans_select(): Bad type for case expr.
Date: Sat, 09 Jun 2018 18:36:00 -0000
X-Bugzilla-Reason: CC
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85996
--- Comment #12 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 18:35:58 2018
New Revision: 261372
URL: https://gcc.gnu.org/viewcvs?rev=261372&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* decl.c (gfc_match_char_spec): Use private namespace in attempt to
reduce a charlen to a constant.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* gfortran.dg/pr85138_1.f90: New test.
* gfortran.dg/pr85138_2.f90: Ditto.
* gfortran.dg/pr85996.f90: Ditto.
Added:
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/pr85138_1.f90
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/pr85138_2.f90
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/pr85996.f90
Modified:
branches/gcc-6-branch/gcc/fortran/ChangeLog
branches/gcc-6-branch/gcc/fortran/decl.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 09 18:36:35 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85138] [8/9 regression] ICE with generic function
Date: Sat, 09 Jun 2018 18:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85138
--- Comment #16 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 18:35:58 2018
New Revision: 261372
URL: https://gcc.gnu.org/viewcvs?rev=261372&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* decl.c (gfc_match_char_spec): Use private namespace in attempt to
reduce a charlen to a constant.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85138
PR fortran/85996
PR fortran/86051
* gfortran.dg/pr85138_1.f90: New test.
* gfortran.dg/pr85138_2.f90: Ditto.
* gfortran.dg/pr85996.f90: Ditto.
Added:
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/pr85138_1.f90
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/pr85138_2.f90
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/pr85996.f90
Modified:
branches/gcc-6-branch/gcc/fortran/ChangeLog
branches/gcc-6-branch/gcc/fortran/decl.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/85996] [8/9 Regression] ICE: gfc_trans_select(): Bad type for case expr.
Date: Sat, 09 Jun 2018 18:37:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #13 from kargl at gcc dot gnu.org ---
Fixed on trunk and 6, 7, and 8 branches.
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Subject: [Bug fortran/85138] [8/9 regression] ICE with generic function
Date: Sat, 09 Jun 2018 18:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85138
Bug 85138 depends on bug 85996, which changed state.
Bug 85996 Summary: [8/9 Regression] ICE: gfc_trans_select(): Bad type for case expr.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85996
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/86051] internal compiler error: in conv_function_val, at fortran/trans-expr.c:3717
Date: Sat, 09 Jun 2018 18:37:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #9 from kargl at gcc dot gnu.org ---
Fixed on trunk and 6, 7, and 8 branches.
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Subject: [Bug fortran/86051] internal compiler error: in conv_function_val, at fortran/trans-expr.c:3717
Date: Sat, 09 Jun 2018 18:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86051
Bug 86051 depends on bug 85996, which changed state.
Bug 85996 Summary: [8/9 Regression] ICE: gfc_trans_select(): Bad type for case expr.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85996
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/85138] [8/9 regression] ICE with generic function
Date: Sat, 09 Jun 2018 18:38:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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Target Milestone|8.2 |6.5
--- Comment #17 from kargl at gcc dot gnu.org ---
Fixed on trunk and 6, 7, and 8 branches.
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Subject: [Bug fortran/86059] ICE in reduce_binary_ac, at fortran/arith.c:1308 (and others)
Date: Sat, 09 Jun 2018 18:55:00 -0000
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #5 from kargl at gcc dot gnu.org ---
Fixed on trunk and 7 and 8 branches.
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Subject: [Bug fortran/86059] ICE in reduce_binary_ac, at fortran/arith.c:1308 (and others)
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--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 18:54:56 2018
New Revision: 261373
URL: https://gcc.gnu.org/viewcvs?rev=261373&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86059
* array.c (match_array_cons_element): NULL() cannot be in an
array constructor.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86059
* gfortran.dg/associate_30.f90: Remove code tested ...
* gfortran.dg/pr67803.f90: Ditto.
* gfortran.dg/pr67805.f90: Ditto.
* gfortran.dg/pr86059.f90: ... here. New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr86059.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/array.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/associate_30.f90
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr67803.f90
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr67805.f90
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Subject: [Bug fortran/78571] ICE in create_character_initializer, at fortran/data.c:191
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
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CC| |kargl at gcc dot gnu.org
Resolution|--- |FIXED
Target Milestone|--- |8.2
--- Comment #4 from kargl at gcc dot gnu.org ---
Fixed on trunk and 8-branch. Patch does not apply to 7-branch.
Closing.
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Subject: [Bug fortran/33056] [Meta-bug] Data - statement related bugs
Date: Sat, 09 Jun 2018 18:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=33056
Bug 33056 depends on bug 78571, which changed state.
Bug 78571 Summary: ICE in create_character_initializer, at fortran/data.c:191
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78571
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/78278] ICE in gfc_wide_memset, at fortran/scanner.c:153
Date: Sat, 09 Jun 2018 19:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78278
--- Comment #10 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 19:57:29 2018
New Revision: 261374
URL: https://gcc.gnu.org/viewcvs?rev=261374&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78278
* data.c (gfc_assign_data_value): Re-arrange code to allow for
an error for double initialization of CHARACTER entities.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/78278
* gfortran.dg/data_bounds_1.f90: Add -std=gnu option.
* gfortran.dg/data_char_1.f90: Ditto.
* gfortran.dg/pr78571.f90: Ditto.
* gfortran.dg/pr78278.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr78278.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/data.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/data_bounds_1.f90
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/data_char_1.f90
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Subject: [Bug fortran/78278] ICE in gfc_wide_memset, at fortran/scanner.c:153
Date: Sat, 09 Jun 2018 19:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78278
kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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Status|WAITING |RESOLVED
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Target Milestone|--- |7.4
--- Comment #11 from kargl at gcc dot gnu.org ---
Fixed on trunk and 7 and 8 branches. Closing.
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Subject: [Bug fortran/38351] Poor error message for rank mismatch in operator args
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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CC| |kargl at gcc dot gnu.org
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Subject: [Bug fortran/63514] functions containing volatile are considered pure
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63514
--- Comment #8 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 20:10:34 2018
New Revision: 261375
URL: https://gcc.gnu.org/viewcvs?rev=261375&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/63514
* symbol.c (gfc_add_volatile): Enforce F2008:C1282 and F2018:C1588.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/63514
* gfortran.dg/pr63514.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr63514.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/symbol.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/63514] functions containing volatile are considered pure
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from kargl at gcc dot gnu.org ---
The missing check for a local volatile variable is fixed
on trunk and 7 and 8 branches. The issue with depending
on a side effect is not fixed as it is outside the scope
of the Fortran standard.
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Subject: [Bug fortran/38351] Poor error message for rank mismatch in operator args
Date: Sat, 09 Jun 2018 21:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38351
--- Comment #5 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Jun 9 21:54:45 2018
New Revision: 261376
URL: https://gcc.gnu.org/viewcvs?rev=261376&root=gcc&view=rev
Log:
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/38351
* resolve.c (resolve_operator): Provide better error message for
derived type entity used in an binary intrinsic numeric operator.
2018-06-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/38351
* gfortran.dg/pr38351.f90: New test.
* gfortran.dg/typebound_operator_4.f03: Adjust for new error message.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr38351.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/resolve.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/typebound_operator_4.f03
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Subject: [Bug fortran/38351] Poor error message for rank mismatch in operator args
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #6 from kargl at gcc dot gnu.org ---
Fixed on trunk and 7 and 8 branches.
Closing.
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Subject: [Bug c++/86099] New: internal compiler error: in cx_check_missing_mem_inits, at cp/constexpr.c:815
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86099
Bug ID: 86099
Summary: internal compiler error: in
cx_check_missing_mem_inits, at cp/constexpr.c:815
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: darpeer at hotmail dot com
Target Milestone: ---
>From gcc-bugs-return-606863-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 10 00:11:02 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86099] internal compiler error: in cx_check_missing_mem_inits, at cp/constexpr.c:815
Date: Sun, 10 Jun 2018 00:11:00 -0000
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--- Comment #1 from darpeer at hotmail dot com ---
Created attachment 44255
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44255&action=edit
Compresses source file.
/tmp/file.prepro.cpp: In instantiation of ‘constexpr std::pair<_T1,
_T2>::pair(std::pair<_T1, _T2>&&) [with _T1 = llvm::StringRef; _T2 = unsigned
int]’:
/tmp/file.prepro.cpp:3234:12: required from ‘struct
std::__is_nt_constructible_impl<std::pair<llvm::StringRef, unsigned int>,
std::pair<llvm::StringRef, unsigned int>&&>’
/tmp/file.prepro.cpp:2621:12: required from ‘struct
std::__and_<std::is_constructible<std::pair<llvm::StringRef, unsigned int>,
std::pair<llvm::StringRef, unsigned int>&&>,
std::__is_nt_constructible_impl<std::pair<llvm::StringRef, unsigned int>,
std::pair<llvm::StringRef, unsigned int>&&> >’
/tmp/file.prepro.cpp:3244:12: required from ‘struct
std::is_nothrow_constructible<std::pair<llvm::StringRef, unsigned int>,
std::pair<llvm::StringRef, unsigned int>&&>’
/tmp/file.prepro.cpp:3268:12: required from ‘struct
std::__is_nothrow_move_constructible_impl<std::pair<llvm::StringRef, unsigned
int>, true>’
/tmp/file.prepro.cpp:3273:12: required from ‘struct
std::is_nothrow_move_constructible<std::pair<llvm::StringRef, unsigned int> >’
/tmp/file.prepro.cpp:2630:31: [ skipping 2 instantiation contexts, use
-ftemplate-backtrace-limit=0 to disable ]
/tmp/file.prepro.cpp:4422:12: required from ‘struct
std::__move_if_noexcept_cond<std::pair<llvm::StringRef, unsigned int> >’
/tmp/file.prepro.cpp:8568:26: required by substitution of ‘template<class
_Tp, class _ReturnType> _ReturnType std::__make_move_if_noexcept_iterator(_Tp*)
[with _Tp = std::pair<llvm::StringRef, unsigned int>; _ReturnType = <missing>]’
/tmp/file.prepro.cpp:12864:40: required from ‘_ForwardIterator
std::__uninitialized_move_if_noexcept_a(_InputIterator, _InputIterator,
_ForwardIterator, _Allocator&) [with _InputIterator =
std::pair<llvm::StringRef, unsigned int>*; _ForwardIterator =
std::pair<llvm::StringRef, unsigned int>*; _Allocator =
std::allocator<std::pair<llvm::StringRef, unsigned int> >]’
/tmp/file.prepro.cpp:38837:6: required from ‘void std::vector<_Tp,
_Alloc>::_M_realloc_insert(std::vector<_Tp, _Alloc>::iterator, _Args&& ...)
[with _Args = {const char*, unsigned int}; _Tp = std::pair<llvm::StringRef,
unsigned int>; _Alloc = std::allocator<std::pair<llvm::StringRef, unsigned int>
>; std::vector<_Tp, _Alloc>::iterator =
__gnu_cxx::__normal_iterator<std::pair<llvm::StringRef, unsigned int>*,
std::vector<std::pair<llvm::StringRef, unsigned int> > >; typename
std::_Vector_base<_Tp, _Alloc>::pointer = std::pair<llvm::StringRef, unsigned
int>*]’
/tmp/file.prepro.cpp:38560:4: required from ‘void std::vector<_Tp,
_Alloc>::emplace_back(_Args&& ...) [with _Args = {const char*, unsigned int};
_Tp = std::pair<llvm::StringRef, unsigned int>; _Alloc =
std::allocator<std::pair<llvm::StringRef, unsigned int> >]’
/tmp/file.prepro.cpp:105254:63: required from here
/tmp/file.prepro.cpp:6644:12: internal compiler error: in
cx_check_missing_mem_inits, at cp/constexpr.c:815
struct pair
^~~~
0x5e955e cx_check_missing_mem_inits
../../../source/gcc/gcc/cp/constexpr.c:814
0x85af8c register_constexpr_fundef(tree_node*, tree_node*)
../../../source/gcc/gcc/cp/constexpr.c:874
0x899a02 maybe_save_function_definition
../../../source/gcc/gcc/cp/decl.c:15585
0x899a02 finish_function(bool)
../../../source/gcc/gcc/cp/decl.c:15716
0x8f0fea synthesize_method(tree_node*)
../../../source/gcc/gcc/cp/method.c:941
0x965ae3 instantiate_decl(tree_node*, bool, bool)
../../../source/gcc/gcc/cp/pt.c:24008
0x84d23f instantiate_cx_fn_r
../../../source/gcc/gcc/cp/constexpr.c:4833
0x112faab walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../../source/gcc/gcc/tree.c:11406
0x11301cf walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../../source/gcc/gcc/tree.c:11722
0x112f620 walk_tree_without_duplicates_1(tree_node**, tree_node*
(*)(tree_node**, int*, void*), void*, tree_node* (*)(tree_node**, int*,
tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*,
default_hash_traits<tree_node*> >*))
../../../source/gcc/gcc/tree.c:11748
0x85657d instantiate_constexpr_fns
../../../source/gcc/gcc/cp/constexpr.c:4852
0x85657d is_sub_constant_expr(tree_node*)
../../../source/gcc/gcc/cp/constexpr.c:5003
0x8c5397 check_noexcept_r
../../../source/gcc/gcc/cp/except.c:1044
0x112faab walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../../source/gcc/gcc/tree.c:11406
0x112fe23 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../../source/gcc/gcc/tree.c:11632
0x112f620 walk_tree_without_duplicates_1(tree_node**, tree_node*
(*)(tree_node**, int*, void*), void*, tree_node* (*)(tree_node**, int*,
tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*,
default_hash_traits<tree_node*> >*))
../../../source/gcc/gcc/tree.c:11748
0x8c4fdf expr_noexcept_p(tree_node*, int)
../../../source/gcc/gcc/cp/except.c:1122
0x8c5168 finish_noexcept_expr(tree_node*, int)
../../../source/gcc/gcc/cp/except.c:1107
0x95d7e7 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../../source/gcc/gcc/cp/pt.c:18096
0x968f87 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../../source/gcc/gcc/cp/pt.c:17414
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/86070] [7 regression] gfortran.dg/fmt_zero_digits.f90 segmentation fault starting with r261077
Date: Sun, 10 Jun 2018 00:26:00 -0000
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--- Comment #4 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Jerry DeLisle from comment #3)
> I am seeing a memory issue with valgrind....investigating
Had a variable being used unitialized specific to the flt_str_len that I added
in my offending patch and specific to the test case. The following fixes this
latent bug as shown with valgrind:
diff --git a/libgfortran/io/write_float.def b/libgfortran/io/write_float.def
index 177a568e041..25ea64beb21 100644
--- a/libgfortran/io/write_float.def
+++ b/libgfortran/io/write_float.def
@@ -135,6 +135,7 @@ build_float_string (st_parameter_dt *dtp, const fnode *f,
char *buffer,
w = f->u.real.w;
d = f->u.real.d;
p = dtp->u.p.scale_factor;
+ *len = 0;
rchar = '5';
Can you verify this fixes the originally reported problem which I could not
reproduce?
>From gcc-bugs-return-606865-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 10 01:03:06 2018
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Subject: [Bug target/80833] 32-bit x86 causes store-forwarding stalls for int64_t -> xmm
Date: Sun, 10 Jun 2018 01:02:00 -0000
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--- Comment #14 from Peter Cordes <peter at cordes dot ca> ---
I happened to look at this old bug again recently.
re: extracting high the low two 32-bit elements:
(In reply to Uroš Bizjak from comment #11)
> > Or without SSE4 -mtune=sandybridge (anything that excluded Nehalem and other
> > CPUs where an FP shuffle has bypass delay between integer ops)
> >
> > movd %xmm0, %eax
> > movshdup %xmm0, %xmm0 # saves 1B of code-size vs. psrldq, I think.
> > movd %xmm0, %edx
> >
> > Or without SSE3,
> >
> > movd %xmm0, %eax
> > psrldq $4, %xmm0 # 1 m-op cheaper than pshufd on K8
> > movd %xmm0, %edx
>
> The above two proposals are not suitable for generic moves. We should not
> clobber input value, and we are not allowed to use temporary.
SSE3 movshdup broadcasts the high element within each pair of 32-bit elements
so
movshdup %xmm0, %xmm1
movd %xmm1, %eax
saves a byte of code vs pshufd / movd, and saves a uop on Merom and avoids a
flt->int. (According to Agner Fog's tables, pshufd is flt->int domain, i.e. it
wants input in the float domain. While movshdup ironically is only an integer
shuffle.)
Probably not worth looking for that optimization, though, because it's not
worth using universally (Nehalem has worse latency for float shuffles between
int instructions).
With just SSE2, PSHUFLW is the same size as PSHUFD and faster on Merom / K8
(slowshuffle CPUs where PSHUFD is multiple uops). It's not slower on any
current CPUs. I could imagine some future CPU having better throughput for
32-bit element size shuffles than 16-bit, though. That's already the case for
wider lane-crossing shuffles (VPERMW YMM is multiple uops on Skylake-AVX512).
This would be a definite win for tune=core2 or k8, and Pentium M, but those are
so old it's probably not worth adding extra code to look for it.
I think it's pretty future-proof, though, unless Intel or AMD add an extra
shuffle unit for element sizes of 32-bit or wider on another port.
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Subject: [Bug middle-end/86095] [8/9 Regression] documentation for -Wunsafe-loop-optimizations references options which have no effect any more
Date: Sun, 10 Jun 2018 01:19:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|other |middle-end
Target Milestone|--- |8.2
Summary|stale documentation for |[8/9 Regression]
|-Wunsafe-loop-optimizations |documentation for
| |-Wunsafe-loop-optimizations
| |references options which
| |have no effect any more
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.2
Severity|normal |blocker
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/86070] [7 regression] gfortran.dg/fmt_zero_digits.f90 segmentation fault starting with r261077
Date: Sun, 10 Jun 2018 01:50:00 -0000
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--- Comment #5 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Sun Jun 10 01:49:02 2018
New Revision: 261382
URL: https://gcc.gnu.org/viewcvs?rev=261382&root=gcc&view=rev
Log:
2018-06-09 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/86070
* io/write_float.def (build_float_string): Initialize *len.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/write_float.def
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Subject: [Bug target/80820] _mm_set_epi64x shouldn't store/reload for -mtune=haswell, Zen should avoid store/reload, and generic should think about it.
Date: Sun, 10 Jun 2018 02:02:00 -0000
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--- Comment #5 from Peter Cordes <peter at cordes dot ca> ---
AVX512F with marge-masking for integer->vector broadcasts give us a single-uop
replacement for vpinsrq/d, which is 2 uops on Intel/AMD.
See my answer on
https://stackoverflow.com/questions/50779309/loading-an-xmm-from-gp-regs. I
don't have access to real hardware, but according to reported uop counts, this
should be very good: 1 uop per instruction on Skylake-avx512 or KNL
vmovq xmm0, rax 1 uop p5 2c latency
vpbroadcastq xmm0{k1}, rdx ; k1 = 0b0010 1 uop p5 3c latency
vpbroadcastq ymm0{k2}, rdi ; k2 = 0b0100 1 uop p5 3c latency
vpbroadcastq ymm0{k3}, rsi ; k3 = 0b1000 1 uop p5 3c latency
xmm vs. ymm vs. zmm makes no difference to latency, according to InstLatx64
(For a full ZMM vector, maybe start a 2nd dep chain and vinsert to combine
256-bit halves. Also means only 3 k registers instead of 7)
vpbroadcastq zmm0{k4}, rcx ; k4 =0b10000 3c latency
... filling up the ZMM reg
Starting with k1 = 2 = 0b0010, we can init the rest with KSHIFT:
mov eax, 0b0010 = 2
kmovw k1, eax
KSHIFTLW k2, k1, 1
KSHIFTLW k3, k1, 2
# KSHIFTLW k4, k1, 3
...
KSHIFT runs only on port 5 (SKX), but so does KMOV; moving from integer
registers would just cost extra instructions to set up integer regs first.
It's actually ok if the upper bytes of the vector are filled with broadcasts,
not zeros, so we could use 0b1110 / 0b1100 etc. for the masks. We could start
with kxnor to generate a -1 and left-shift that, but that's 2 port5 uops vs.
mov eax,2 / kmovw k1, eax being p0156 + p5.
Loading k registers from memory is not helpful: according to IACA, it costs 3
uops. (But that includes p237, and a store-AGU uop makes no sense, so it might
be wrong.)
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Subject: [Bug libfortran/86070] [7 regression] gfortran.dg/fmt_zero_digits.f90 segmentation fault starting with r261077
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--- Comment #6 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Sun Jun 10 02:26:57 2018
New Revision: 261383
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Log:
2018-06-09 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/86070
* io/write_float.def (build_float_string): Initialize *len.
Modified:
branches/gcc-8-branch/libgfortran/ChangeLog
branches/gcc-8-branch/libgfortran/io/write_float.def
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Subject: [Bug libfortran/86070] [7 regression] gfortran.dg/fmt_zero_digits.f90 segmentation fault starting with r261077
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--- Comment #7 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Sun Jun 10 03:10:00 2018
New Revision: 261384
URL: https://gcc.gnu.org/viewcvs?rev=261384&root=gcc&view=rev
Log:
2018-06-09 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Backport from trunk.
PR libgfortran/86070
* io/write_float.def (build_float_string): Initialize *len.
Modified:
branches/gcc-7-branch/libgfortran/ChangeLog
branches/gcc-7-branch/libgfortran/io/write_float.def
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Subject: [Bug testsuite/32064] ssp tests can't find libssp
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--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #6)
> (In reply to comment #5)
> > Still an issue, e.g. on Solaris 11.
> >
>
> You can try my patches from 2007 to see if they
> work for you.
They're almost 11 years old by this point...
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Subject: [Bug fortran/54687] Use gcc option machinery for gfortran
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #16 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #14)
> (In reply to Dominique d'Humieres from comment #13)
> > No activity since over two years. Any objection to close this PR as FIXED?
>
> I personally don't mind since I don't use gfortran and I am not planning to
> work on this
OK, closing then
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Subject: [Bug fortran/85088] improve diagnostic for bad INTENT declaration ('Invalid character in name at')
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--- Comment #8 from janus at gcc dot gnu.org ---
Author: janus
Date: Sun Jun 10 08:20:50 2018
New Revision: 261386
URL: https://gcc.gnu.org/viewcvs?rev=261386&root=gcc&view=rev
Log:
2018-06-10 Janus Weil <janus@gcc.gnu.org>
PR fortran/85088
* decl.c (match_attr_spec): Synchronize the DECL_* enum values with the
INTENT_* values from the enum 'sym_intent'. Call 'match_intent_spec'
and remove a TODO note.
* gfortran.h: Add a comment to sym_intent.
2018-06-10 Janus Weil <janus@gcc.gnu.org>
PR fortran/85088
* gfortran.dg/intent_decl_1.f90: New test case.
Added:
trunk/gcc/testsuite/gfortran.dg/intent_decl_1.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/fortran/gfortran.h
trunk/gcc/testsuite/ChangeLog
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janus at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #9 from janus at gcc dot gnu.org ---
Fixed with r261386. Closing.
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P5
Status|RESOLVED |ASSIGNED
Resolution|FIXED |---
Assignee|unassigned at gcc dot gnu.org |dominiq at lps dot ens.fr
--- Comment #17 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Let me have a deeper look at what can be done.
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Subject: [Bug fortran/79854] diagnostics: gfc_conv_constant_to_tree should be gfc_internal_error
Date: Sun, 10 Jun 2018 12:51:00 -0000
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--- Comment #6 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Sun Jun 10 12:50:03 2018
New Revision: 261387
URL: https://gcc.gnu.org/viewcvs?rev=261387&root=gcc&view=rev
Log:
2018-06-10 Dominique d'Humieres <dominiq@gcc.gnu.org>
PR fortran/79854
* trans-const.c: Remove include "diagnostic-core.h".
(gfc_conv_constant_to_tree): Replace fatal_error with gcc_unreachable.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-const.c
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Subject: [Bug fortran/79854] diagnostics: gfc_conv_constant_to_tree should be gfc_internal_error
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Closing.
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Subject: [Bug fortran/86100] New: Spurious error with -fcheck=bounds and allocatable class(*) array components
Date: Sun, 10 Jun 2018 13:17:00 -0000
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Bug ID: 86100
Summary: Spurious error with -fcheck=bounds and allocatable
class(*) array components
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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When compiled with -fcheck=bounds, the following example gives a spurious
runtime bound mismatch error on the 'b=a' assignment statement:
type any_matrix
class(*), allocatable :: m(:,:)
end type
type(any_matrix) :: a, b
allocate(a%m, source=reshape([3,5],shape=[1,2]))
b = a ! SPURIOUS RUNTIME ERROR with -fcheck=bounds
end
At line 6 of file gfortran-20180610.f90
Fortran runtime error: Array bound mismatch for dimension 1 of array
'<<unknown>>' (2/1)
Without the -fcheck=bounds option the assignment executes correctly (checked
via adding code to examine b%m).
There are no problems if the array component is rank-1, or if it is declared
integer instead of class(*). So this issue seems confined to allocatable
class(*) components of rank 2 (or greater?)
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Subject: [Bug tree-optimization/86101] New: [8/9 Regression] IEEE_UNDERFLOW_FLAG in 416.gamess with -Ofast -march=native on bdver4
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Bug ID: 86101
Summary: [8/9 Regression] IEEE_UNDERFLOW_FLAG in 416.gamess
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Starting from r259592 the benchmark fails:
****************************************
Contents of h2ocu2+.gradient.err
****************************************
Note: The following floating-point exceptions are signalling:
IEEE_UNDERFLOW_FLAG
****************************************
****************************************
Contents of triazolium.err
****************************************
Note: The following floating-point exceptions are signalling: IEEE_INVALID_FLAG
****************************************
*** Miscompare of cytosine.2.out; for details see
/home/gcc/buildworker/source/cpu2006/benchspec/CPU2006/416.gamess/run/run_peak_ref_amd64-m64-mine.0001/cytosine.2.out.mis
Flags:
-Ofast -march=native -g -std=legacy
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
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Subject: [Bug fortran/86100] Spurious error with -fcheck=bounds and allocatable class(*) array components
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-10
Blocks| |27766
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 6.4.0 up to trunk (9.0).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=27766
[Bug 27766] [meta-bug] -fbounds-check related bugs
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Subject: [Bug fortran/64397] [OOP] Runtime segfault with parenthesis expression passed to polymorphic dummy argument
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #8)
> AFAICT this PR is now fixed, likely r251949 (pr34640 and friends).
Well, for the original testcase, a=my_integer([1]) leaks memory.
If replaced with:
integer :: i(1) = [1]
a=my_integer(i)
the segfault at:
c = (a)
returns.
It seems that there is a way to go on this one :-(
Reverting to NEW and taking.
Paul
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Subject: [Bug fortran/64397] [OOP] Runtime segfault with parenthesis expression passed to polymorphic dummy argument
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Reverting to NEW and taking.
So ASSIGNED!-)
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Subject: [Bug fortran/85599] Prevent short-circuiting of logical expressions for non-pure functions
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #34 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I'll work on the warning.
>From gcc-bugs-return-606886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 10 18:21:55 2018
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Subject: [Bug tree-optimization/86101] [8/9 Regression] IEEE_UNDERFLOW_FLAG in 416.gamess with -Ofast -march=native on bdver4
Date: Sun, 10 Jun 2018 18:21:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
-fno-aggressive-loop-optimizations
*** This bug has been marked as a duplicate of bug 69368 ***
>From gcc-bugs-return-606885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 10 18:21:04 2018
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Subject: [Bug fortran/68544] ICE trying to pass derived type constructor as a function
Date: Sun, 10 Jun 2018 18:21:00 -0000
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>From gcc-bugs-return-606887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 10 18:22:00 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/69368] [6 Regression] spec2006 test case 416.gamess fails with the g++ 6.0 compiler starting with r232508
Date: Sun, 10 Jun 2018 18:21:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #96 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 86101 has been marked as a duplicate of this bug. ***
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Subject: [Bug middle-end/26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
Date: Sun, 10 Jun 2018 18:22:00 -0000
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Bug 26163 depends on bug 86101, which changed state.
Bug 86101 Summary: [8/9 Regression] IEEE_UNDERFLOW_FLAG in 416.gamess with -Ofast -march=native on bdver4
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86101
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>From gcc-bugs-return-606889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 10 19:45:48 2018
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From: "jg at jguk dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86102] New: Include argument name in warning
Date: Sun, 10 Jun 2018 19:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86102
Bug ID: 86102
Summary: Include argument name in warning
Product: gcc
Version: 8.1.0
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Could GCC list the parameter name please?
Current output
$ gcc -O2 -Wall -Wextra -Wpedantic -o main main.c
main.c: In function ‘main’:
main.c:9:12: warning: format ‘%zu’ expects argument of type ‘size_t’, but
argument 3 has type ‘char *’ [-Wformat=]
printf("result: %zu %zu %zu\n", value, "test", str);
^
main.c:9:12: warning: format ‘%zu’ expects argument of type ‘size_t’, but
argument 4 has type ‘char *’ [-Wformat=]
Improved output:
$ gcc -O2 -Wall -Wextra -Wpedantic -o main main.c
main.c: In function ‘main’:
main.c:9:12: warning: format ‘%zu’ expects argument of type ‘size_t’, but
argument 3 '"test"' has type ‘char *’ [-Wformat=]
printf("result: %zu %zu %zu\n", value, "test", str);
^
main.c:9:12: warning: format ‘%zu’ expects argument of type ‘size_t’, but
argument 4 'str' has type ‘char *’ [-Wformat=]
This example as a string-litteral (as I believe it is called) in arg 3, and a
char* pointer as arg 4.
//gcc -O2 -Wall -Wextra -Wpedantic -o main main.c
#include <stdio.h>
int main (void)
{
size_t value = 0;
char * str = "other";
printf("result: %zu %zu %zu\n", value, "test", str);
return 0;
}
>From gcc-bugs-return-606891-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 10 19:57:00 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
Date: Sun, 10 Jun 2018 19:56:00 -0000
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Jürgen Reuter <juergen.reuter at desy dot de> changed:
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--- Comment #2 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Possible duplicate: PR86103.
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86103] New: [9.0 Regression] ICE in in get_string_length, at tree-ssa-strlen.c:653
Date: Sun, 10 Jun 2018 19:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86103
Bug ID: 86103
Summary: [9.0 Regression] ICE in in get_string_length, at
tree-ssa-strlen.c:653
Product: gcc
Version: 9.0
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Created attachment 44256
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44256&action=edit
Reproducer for the ICE.
I get an ICE in get_string_length, at tree-sea-strlen.c:653. Possibly a
duplicate of PR86089. The code that triggers the error is attached. r260633
still worked, r261388. The problem appears on Darwin17.6.0, High Sierra 10.13.5
with Xcode 9.4.
The ICE error message is:
$ gcc -DPACKAGE_NAME=\"WHIZARD\" -DPACKAGE_TARNAME=\"whizard\"
-DPACKAGE_VERSION=\"2.6.4\" "-DPACKAGE_STRING=\"WHIZARD 2.6.4\""
-DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"whizard\"
-DVERSION=\"2.6.4\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1
-DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1
-DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1
-DLT_OBJDIR=\".libs/\" -DHAVE_QUADMATH_H=1 -DHAVE_DLFCN_H=1 -I. -I../../mcfio
-g -O2 -MT mcf_ntuBldDbinc.lo -MD -MP -MF .deps/mcf_ntuBldDbinc.Tpo -c
mcf_ntuBldDbinc.c -fno-common -DPIC -o .libs/mcf_ntuBldDbinc.o
during GIMPLE pass: strlen
mcf_ntuBldDbinc.c: In function 'mcf_ntubldRead':
mcf_ntuBldDbinc.c:475:6: internal compiler error: in get_string_length, at
tree-ssa-strlen.c:653
void mcf_ntubldRead(char* fname)
^~~~~~~~~~~~~~
libbacktrace could not find executable to open
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86102] Include argument name in warning
Date: Sun, 10 Jun 2018 19:59:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is a bad idea, trying to print arbitrary expressions results in them being
printed in whatever form the compiler has the expression at the point of the
warning, which is often different from what the user wrote.
The right thing is to print proper caret, and at least for me I'm getting
exactly that, I don't get what you printed, but instead:
gcc -S -Wall -W pr86102.c -O2
pr86102.c: In function ‘main’:
pr86102.c:7:27: warning: format ‘%zu’ expects argument of type ‘size_t’, but
argument 3 has type ‘char *’ [-Wformat=]
printf("result: %zu %zu %zu\n", value, "test", str);
~~^ ~~~~~~
%s
pr86102.c:7:31: warning: format ‘%zu’ expects argument of type ‘size_t’, but
argument 4 has type ‘char *’ [-Wformat=]
printf("result: %zu %zu %zu\n", value, "test", str);
~~^ ~~~
%s
and
g++ -S -Wall -W pr86102.C -O2
pr86102.C: In function ‘int main()’:
pr86102.C:6:18: warning: ISO C++ forbids converting a string constant to
‘char*’ [-Wwrite-strings]
char * str = "other";
^~~~~~~
pr86102.C:7:12: warning: format ‘%zu’ expects argument of type ‘size_t’, but
argument 3 has type ‘const char*’ [-Wformat=]
printf("result: %zu %zu %zu\n", value, "test", str);
^~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~
pr86102.C:7:12: warning: format ‘%zu’ expects argument of type ‘size_t’, but
argument 4 has type ‘char*’ [-Wformat=]
>From gcc-bugs-return-606893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 10 20:08:32 2018
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Subject: [Bug c/86102] Include argument name in warning
Date: Sun, 10 Jun 2018 20:08:00 -0000
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--- Comment #2 from Jonny Grant <jg at jguk dot org> ---
My bad apologies, I pasted the wrong compiler output from older gcc
If I fix that const error in my sample, I get same output as you, with correct
carat.
Could I check - do you mean callnig a function like
printf("result: %zu %zu %zu\n", value, "test", str);
There is no benefit from displaying 'value' '"test"' or 'str' ?
Some functions might have 10 arguments.. much clearer to print the name of the
one that is bad I feel :)
<source>: In function 'int main()':
<source>:9:12: error: format '%zu' expects argument of type 'size_t', but
argument 3 has type 'const char*' [-Werror=format=]
printf("result: %zu %zu %zu\n", value, "test", str);
^~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~
<source>:9:12: error: format '%zu' expects argument of type 'size_t', but
argument 4 has type 'const char*' [-Werror=format=]
cc1plus: all warnings being treated as errors
Compiler returned: 1
//gcc -O2 -Wall -Wextra -Wpedantic -o main main.c
#include <stdio.h>
int main (void)
{
size_t value = 0;
const char * str = "other";
printf("result: %zu %zu %zu\n", value, "test", str);
return 0;
}
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
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--- Comment #3 from Jürgen Reuter <juergen.reuter at desy dot de> ---
I can definitely confirm this problem. Works with -O0 and -O1. Fails with -O2.
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
Date: Sun, 10 Jun 2018 20:56:00 -0000
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--- Comment #4 from Jürgen Reuter <juergen.reuter at desy dot de> ---
This is the dump-tree-original file, which is produced despite of the ICE, and
which is identical for -O1 and -O2:
;; Function __sputc (null)
;; enabled by -tree-original
{
if ( --_p->_w >= 0 || _p->_w >= _p->_lbfsize && (signed char) _c != 10)
{
return (int) (*_p->_p++ = (unsigned char) _c);
}
else
{
return __swbuf (_c, _p);
}
}
;; Function hoo (null)
;; enabled by -tree-original
{
int slen;
char file[32];
int slen;
char file[32];
__builtin___strcpy_chk ((char *) &file, (const char *) in,
__builtin_object_size ((const void *) &file, 1));
slen = (int) strlen ((const char *) &file);
__builtin___sprintf_chk ((char *) &file + (sizetype) slen, 0,
__builtin_object_size ((const void *) &file + (sizetype) slen, 1), (const char
*) "1.out");
}
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
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--- Comment #5 from Jürgen Reuter <juergen.reuter at desy dot de> ---
And this is the assembler code when executing -S -O1 (cf. below), while for the
-O2
version the compilation leads to an assembler file showing only the .text line:
.text
.globl _hoo
_hoo:
LFB1:
subq $40, %rsp
LCFI0:
movq %rdi, %rsi
movq %rsp, %rdi
movl $32, %edx
call ___strcpy_chk
addq $40, %rsp
LCFI1:
ret
LFE1:
.section
__TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support
EH_frame1:
.set L$set$0,LECIE1-LSCIE1
.long L$set$0
LSCIE1:
.long 0
.byte 0x1
.ascii "zR\0"
.byte 0x1
.byte 0x78
.byte 0x10
.byte 0x1
.byte 0x10
.byte 0xc
.byte 0x7
.byte 0x8
.byte 0x90
.byte 0x1
.align 3
LECIE1:
LSFDE1:
.set L$set$1,LEFDE1-LASFDE1
.long L$set$1
LASFDE1:
.long LASFDE1-EH_frame1
.quad LFB1-.
.set L$set$2,LFE1-LFB1
.quad L$set$2
.byte 0
.byte 0x4
.set L$set$3,LCFI0-LFB1
.long L$set$3
.byte 0xe
.byte 0x30
.byte 0x4
.set L$set$4,LCFI1-LCFI0
.long L$set$4
.byte 0xe
.byte 0x8
.align 3
LEFDE1:
.subsections_via_symbols
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
CC| |marxin at gcc dot gnu.org
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Thanks for the dump. I can confirm the iCE with the simplified test case
below. It's caused by a typo in r261304 in the hunk below. The
BUILT_IN_STRCPY_CHK case needs to stay:
@@ -628,16 +617,8 @@ get_string_length (strinfo *si)
lhs = NULL_TREE;
/* FALLTHRU */
case BUILT_IN_STRCPY:
- case BUILT_IN_STRCPY_CHK:
- case BUILT_IN_STRCPY_CHKP:
- case BUILT_IN_STRCPY_CHK_CHKP:
gcc_assert (builtin_decl_implicit_p (BUILT_IN_STPCPY));
- if (gimple_call_num_args (stmt) == (with_bounds ? 4 : 2))
- fn = builtin_decl_implicit (BUILT_IN_STPCPY);
- else
- fn = builtin_decl_explicit (BUILT_IN_STPCPY_CHK);
- if (with_bounds)
- fn = chkp_maybe_create_clone (fn)->decl;
+ fn = builtin_decl_implicit (BUILT_IN_STPCPY);
gcc_assert (lhs == NULL_TREE);
if (dump_file && (dump_flags & TDF_DETAILS) != 0)
{
$ cat pr86089.c && gcc -O2 -S -Wall pr86089.c
extern char* stpcpy (char*, const char*);
int f (char* s)
{
char a[32];
__builtin___strcpy_chk (a, s, __builtin_object_size (a, 1));
return __builtin_strlen (a);
}
during GIMPLE pass: strlen
pr86089.c: In function ‘f’:
pr86089.c:3:5: internal compiler error: in get_string_length, at
tree-ssa-strlen.c:653
int f (char* s)
^
0x1233bb5 get_string_length
/ssd/src/gcc/git-svn/gcc/tree-ssa-strlen.c:653
0x1235343 handle_builtin_strlen
/ssd/src/gcc/git-svn/gcc/tree-ssa-strlen.c:1190
0x123bd1c strlen_check_and_optimize_stmt
/ssd/src/gcc/git-svn/gcc/tree-ssa-strlen.c:3330
0x123d4b3 strlen_dom_walker::before_dom_children(basic_block_def*)
/ssd/src/gcc/git-svn/gcc/tree-ssa-strlen.c:3683
0x1b3cea3 dom_walker::walk(basic_block_def*)
/ssd/src/gcc/git-svn/gcc/domwalk.c:353
0x123d744 execute
/ssd/src/gcc/git-svn/gcc/tree-ssa-strlen.c:3763
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
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--- Comment #7 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Ah I see, so when Martin Liska removed the MPX-support in r261304 you removed
too much from the tree-ssa-strlen.c file? Then a rather fast fix is hopefully
possible.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86083
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-10
Blocks| |83819
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00539.html
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83819
[Bug 83819] [meta-bug] missing strlen optimizations
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Subject: [Bug fortran/67883] ICE on empty array constructor of character function
Date: Sun, 10 Jun 2018 22:19:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #4 from kargl at gcc dot gnu.org ---
(In reply to Gerhard Steinmetz from comment #0)
> With an effectively empty (i=m,n and m>n) array constructor :
>
>
> $ cat z1.f90
> program p
> integer i
> print *, [(f(i), i=2,1)]
> contains
> function f(n)
> integer :: n
> character(:), allocatable :: f
> character(3) :: c = 'abc'
> f = c(n:n)
> end
> end
>
>
> $ gfortran -g -O0 -Wall -fcheck=all -fno-frontend-optimize z1.f90
> z1.f90:3:25:
>
> print *, [(f(i), i=2,1)]
> 1
> Warning: DO loop at (1) will be executed zero times [-Wzerotrip]
> f951: internal compiler error: in gfc_resolve_character_array_constructor,
> at fortran/array.c:1955
trunk can now compile this code.
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Subject: [Bug fortran/67883] ICE on empty array constructor of character function
Date: Sun, 10 Jun 2018 22:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67883
--- Comment #5 from kargl at gcc dot gnu.org ---
(In reply to Gerhard Steinmetz from comment #2)
> Another group of examples.
> First case is working in a sufficient manner.
> Concatenating two empty hulls (zero len and size, respectivly)
> gives an empty hull as result again.
>
>
> $ cat zz1.f90
> program p
> character(*), parameter :: c1(*) = [character(*) :: 'a'] // [character(*)
> :: 'z']
> character(*), parameter :: c2(*) = [character(0) ::] // [character(0) ::]
> character(*), parameter :: c3(*) = [character(0) ::] // [character(*) ::]
> character(*), parameter :: c4(*) = [character(0) ::]
> print *, 'c1: ', len(c1), size(c1), c1
> print *, 'c2: ', len(c2), size(c2), c2
> print *, 'c3: ', len(c3), size(c3), c3
> print *, 'c4: ', len(c4), size(c4), c4
> end
>
gfortran issues errors for this testcase. Some are run-on errors.
I'm showing the first two as I think gfortran might be correct.
a.f90:2:39:
character(*), parameter :: c1(*) = [character(*) :: 'a'] // [character(*)
:: 'z']
1
Error: Type-spec at (1) cannot contain an asterisk for a type parameter
a.f90:4:60:
character(*), parameter :: c3(*) = [character(0) ::] // [character(*) ::]
1
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86103] [9 Regression] ICE in in get_string_length, at tree-ssa-strlen.c:653
Date: Mon, 11 Jun 2018 00:05:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Component|c |tree-optimization
Target Milestone|--- |9.0
Summary|[9.0 Regression] ICE in in |[9 Regression] ICE in in
|get_string_length, at |get_string_length, at
|tree-ssa-strlen.c:653 |tree-ssa-strlen.c:653
>From gcc-bugs-return-606903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 00:12:23 2018
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From: "helloqirun at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/86104] New: gcc ICE at -O1 on x86_64-linux-gnu in "plus_constant", at explow.c:103
Date: Mon, 11 Jun 2018 00:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86104
Bug ID: 86104
Summary: gcc ICE at -O1 on x86_64-linux-gnu in "plus_constant",
at explow.c:103
Product: gcc
Version: unknown
Status: UNCONFIRMED
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It happens at 32-bit mode only.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 9.0.0 20180610 (experimental) [trunk revision 261387] (GCC)
$ gcc-trunk -m32 -O1 abc.c
during RTL pass: dse1
abc.c: In function ‘times_two’:
abc.c:16:1: internal compiler error: in plus_constant, at explow.c:103
}
^
0x61289b plus_constant(machine_mode, rtx_def*, poly_int<1u, long>, bool)
../../gcc/gcc/explow.c:103
0x13e5e47 record_store
../../gcc/gcc/dse.c:1505
0x13e6a92 scan_insn
../../gcc/gcc/dse.c:2548
0x13e7912 dse_step1
../../gcc/gcc/dse.c:2660
0x13e7912 rest_of_handle_dse
../../gcc/gcc/dse.c:3577
0x13e7912 execute
../../gcc/gcc/dse.c:3635
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ cat abc.c
int __RTL (startwith ("vregs")) times_two (int i)
{
(function ""
(param "i"
(DECL_RTL (mem(plus) [0 ]))
(DECL_RTL_INCOMING (reg di ))
) (insn-chain
(block 2
(edge-from entry )
(cnote 4 [bb 2] NOTE_INSN_BASIC_BLOCK)
(cinsn 2 (set (mem:SI (plus:DI (reg virtual-stack-vars)
(const_int 4)) [1 i+A32])
(reg:SI di )) )
(edge-to exit (flags "FALLTHRU"))
) ) )
}
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From: "johelegp at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86105] New: Conversion to ambiguous/inaccessible rvalue base is valid in unevaluated context
Date: Mon, 11 Jun 2018 03:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86105
Bug ID: 86105
Summary: Conversion to ambiguous/inaccessible rvalue base is
valid in unevaluated context
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Target Milestone: ---
In the following snippet, the assertions fail although the `static_cast` is
ill-formed in non-unevaluated context. See https://godbolt.org/g/45VJvp, and a
related Clang report https://bugs.llvm.org/show_bug.cgi?id=37691.
```C++
#include <utility>
template <class To, class From>
constexpr bool is_static_castable(...)
{
return false;
};
template <
class To, class From,
class = decltype(static_cast<To>(std::declval<From>()))>
constexpr bool is_static_castable(int)
{
return true;
};
struct B {
};
struct D : B {
};
struct D2
: D
, B {
};
static_assert(!is_static_castable<B&&, D2&>(0), "");
struct D3 : private B {
};
static_assert(!is_static_castable<B&&, D3&>(0), "");
void f()
{
D2 d2;
(void)static_cast<B&&>(d2);
D3 d3;
(void)static_cast<B&&>(d3);
}
```
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Subject: [Bug c/61579] -Wwrite-strings does not behave as a warning option
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #2)
> Confirmed. I might possibly get to this.
For gcc 9 maybe?
>From gcc-bugs-return-606906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 05:32:59 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/43432] Missed vectorization: "complicated access pattern" for increasing and decreasing data indexing
Date: Mon, 11 Jun 2018 05:32:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #4)
> (In reply to Michael Matz from comment #3)
> > Subject: Bug 43432
> >
> > Author: matz
> > Date: Fri Sep 17 13:26:43 2010
> > New Revision: 164367
> >
> > URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=164367
> > Log:
> > PR tree-optimization/43432
> > * tree-vect-data-refs.c (vect_analyze_data_ref_access):
> > Accept backwards consecutive accesses.
> > (vect_create_data_ref_ptr): If step is negative generate
> > decreasing IVs.
> > * tree-vect-stmts.c (vectorizable_store): Reject negative steps.
> > (perm_mask_for_reverse, reverse_vec_elements): New functions.
> > (vectorizable_load): Handle loads with negative steps when easily
> > possible.
> >
> > testsuite/
> > PR tree-optimization/43432
> > * lib/target-supports.exp (check_effective_target_vect_perm_byte,
> > check_effective_target_vect_perm_short): New predicates.
> > (check_effective_target_vect_perm): Include x86_64.
> > * gcc.dg/vect/pr43432.c: New test.
> > * gcc.dg/vect/vect-114.c: Adjust.
> > * gcc.dg/vect/vect-15.c: Ditto.
> > * gcc.dg/vect/slp-perm-8.c: Use new predicate.
> > * gcc.dg/vect/slp-perm-9.c: Ditto.
> >
> > Added:
> > trunk/gcc/testsuite/gcc.dg/vect/pr43432.c
> > Modified:
> > trunk/gcc/ChangeLog
> > trunk/gcc/testsuite/ChangeLog
> > trunk/gcc/testsuite/gcc.dg/vect/slp-perm-8.c
> > trunk/gcc/testsuite/gcc.dg/vect/slp-perm-9.c
> > trunk/gcc/testsuite/gcc.dg/vect/vect-114.c
> > trunk/gcc/testsuite/gcc.dg/vect/vect-15.c
> > trunk/gcc/testsuite/lib/target-supports.exp
> > trunk/gcc/tree-vect-data-refs.c
> > trunk/gcc/tree-vect-stmts.c
>
> Did this fix it?
Putting in WAITING on a reply
>From gcc-bugs-return-606907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 05:35:21 2018
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Subject: [Bug other/37210] Discourage Default Builds in the GCC Source Tree more strongly
Date: Mon, 11 Jun 2018 05:35:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-11
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=35619
Ever confirmed|0 |1
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #6)
> I'm going to confirm this with a slightly modified title
Oops, I didn't actually confirm this when I said so; hopefully it'll do it this
time.
>From gcc-bugs-return-606908-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 06:41:50 2018
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Subject: [Bug rtl-optimization/86104] gcc ICE at -O1 on x86_64-linux-gnu in "plus_constant", at explow.c:103
Date: Mon, 11 Jun 2018 06:41:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-11
CC| |marxin at gcc dot gnu.org
Version|unknown |9.0
Ever confirmed|0 |1
Known to fail| |7.3.0, 8.1.0, 9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with __RTL was added: r244878.
>From gcc-bugs-return-606909-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 06:46:30 2018
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Subject: [Bug rtl-optimization/86104] gcc ICE at -O1 on x86_64-linux-gnu in "plus_constant", at explow.c:103
Date: Mon, 11 Jun 2018 06:46:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Well DI is an invalid mode for mem address. I don't know if __RTL support
should be considered a valid input at all or even consider all invalid input as
not iceing a valid bug.
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 86103 has been marked as a duplicate of this bug. ***
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Subject: [Bug tree-optimization/86103] [9 Regression] ICE in in get_string_length, at tree-ssa-strlen.c:653
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |marxin at gcc dot gnu.org
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 86089 ***
>From gcc-bugs-return-606910-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 06:57:01 2018
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Sorry for the breakage. Thanks Martin for the analysis. Let me send a patch.
>From gcc-bugs-return-606913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 07:01:02 2018
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Subject: [Bug tree-optimization/86101] [8/9 Regression] IEEE_UNDERFLOW_FLAG in 416.gamess with -Ofast -march=native on bdver4
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> -fno-aggressive-loop-optimizations
>
> *** This bug has been marked as a duplicate of bug 69368 ***
Thanks Andrew!
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Subject: [Bug fortran/78571] ICE in create_character_initializer, at fortran/data.c:191
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Christophe Lyon <clyon at gcc dot gnu.org> ---
(In reply to kargl from comment #4)
> Fixed on trunk and 8-branch. Patch does not apply to 7-branch.
> Closing.
Hi,
On gcc-8-branch, I've noticed that this patch causes:
FAIL:gfortran.dg/data_bounds_1.f90 -O (test for excess errors)
FAIL:gfortran.dg/data_char_1.f90 -O0 (test for excess errors)
FAIL:gfortran.dg/data_char_1.f90 -O1 (test for excess errors)
FAIL:gfortran.dg/data_char_1.f90 -O2 (test for excess errors)
FAIL:gfortran.dg/data_char_1.f90 -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions (test for excess errors)
FAIL:gfortran.dg/data_char_1.f90 -O3 -g (test for excess errors)
FAIL:gfortran.dg/data_char_1.f90 -Os (test for excess errors)
The logs contain:
Excess errors:
/gcc/testsuite/gfortran.dg/data_bounds_1.f90:14:49: Warning: GNU Extension:
re-initialization of 'string2' at (1)
/gcc/testsuite/gfortran.dg/data_bounds_1.f90:14:54: Warning: GNU Extension:
re-initialization of 'string2' at (1)
/gcc/testsuite/gfortran.dg/data_bounds_1.f90:14:59: Warning: GNU Extension:
re-initialization of 'string2' at (1)
/gcc/testsuite/gfortran.dg/data_bounds_1.f90:10:33: Warning: GNU Extension:
re-initialization of 'string' at (1)
/gcc/testsuite/gfortran.dg/data_char_1.f90:10:25: Warning: GNU Extension:
re-initialization of 'b' at (1)
/gcc/testsuite/gfortran.dg/data_char_1.f90:10:30: Warning: GNU Extension:
re-initialization of 'b' at (1)
>From gcc-bugs-return-606915-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 07:03:48 2018
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
Date: Mon, 11 Jun 2018 07:03:00 -0000
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--- Comment #10 from Jürgen Reuter <juergen.reuter at desy dot de> ---
I can confirm that re-introducing the line
case BUILT_IN_STRCPY_CHK:
in lines 619/20 in tree-ssa-strlen.c does indeed solve this problem and also
the problem (ICE) with our code reported in PR86103.
>From gcc-bugs-return-606916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 07:06:06 2018
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
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--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
Patch candidate sent here:
https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00546.html
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Subject: [Bug c++/85963] [8/9 Regression] false positive "set but not used" warning [-Wunused-but-set-variable]
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Michael Cortez <mcortez at airpost dot net> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Michael Cortez <mcortez at airpost dot net> ---
Simplified test case:
template<typename T>
inline void foo(T& x) {
const bool bar = true;
x = bar ? (x*x) : T(0);
}
int main() {
double x = 123.4;
foo(x);
return 0;
}
g++ bug.cpp -Wall -O2
bug.cpp: In instantiation of ‘void foo(T&) [with T = double]’:
bug.cpp:9:8: required from here
bug.cpp:3:14: warning: variable ‘bar’ set but not used
[-Wunused-but-set-variable]
const bool bar = true;
^~~
>From gcc-bugs-return-606918-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 08:01:41 2018
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Subject: [Bug c++/85963] [8/9 Regression] false positive "set but not used" warning [-Wunused-but-set-variable]
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--- Comment #3 from Michael Cortez <mcortez at airpost dot net> ---
Created attachment 44257
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44257&action=edit
bug.cpp
simplified test case
>From gcc-bugs-return-606919-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 08:42:13 2018
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
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--- Comment #12 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Martin Liška from comment #11)
> Patch candidate sent here:
> https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00546.html
Thanks for the patch, Martin. I checked that our code works again also with
this (extended) patch including the check on the number of gimple arguments.
>From gcc-bugs-return-606920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 09:03:30 2018
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Subject: [Bug fortran/57160] short-circuit IF only with -ffrontend-optimize
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|RESOLVED |ASSIGNED
Resolution|DUPLICATE |---
Assignee|unassigned at gcc dot gnu.org |tkoenig at gcc dot gnu.org
--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
It is not actually a complete duplicate of PR 85599,
it is just similar.
I have a patch which introduces the ASSOCIATE warning, but not (yet)
the division part.
The problem there is what we should consider for a warning.
if (a != 0 .and. 1/a > 10.) ? Probably.
if (a>0 .and. b>0 .and 1/(a+b)) ? Hm.
Any suggestions?
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Subject: [Bug c/86106] New: powerpc: Suboptimal logical operation
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Bug ID: 86106
Summary: powerpc: Suboptimal logical operation
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unsigned int g(unsigned int val)
{
unsigned int mask = 0x7f7f7f7f;
return ~(((val & mask) + mask) | val | mask);
}
generates the following:
00000020 <g>:
20: 3d 20 7f 7f lis r9,32639
24: 61 29 7f 7f ori r9,r9,32639
28: 7c 69 48 38 and r9,r3,r9
2c: 3d 29 7f 7f addis r9,r9,32639
30: 39 29 7f 7f addi r9,r9,32639
34: 7d 23 1b 78 or r3,r9,r3
38: 64 63 7f 7f oris r3,r3,32639
3c: 60 63 7f 7f ori r3,r3,32639
40: 7c 63 18 f8 not r3,r3
44: 4e 80 00 20 blr
Whereas I'd expect something like:
lis r4,32639
ori r4,r4,32639
and r9,r3,r4
or r3,r3,r4
add r9,r9,r4
nor r3,r9,r3
blr
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Subject: [Bug c/86102] Include argument name in warning
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jonny Grant from comment #2)
> My bad apologies, I pasted the wrong compiler output from older gcc
>
> If I fix that const error in my sample, I get same output as you, with
> correct carat.
>
> Could I check - do you mean callnig a function like
>
> printf("result: %zu %zu %zu\n", value, "test", str);
>
> There is no benefit from displaying 'value' '"test"' or 'str' ?
Yes, there is no benefit in displaying that when it is printed already on the
caret line and can be highlighted with ~~~~s etc.
> Some functions might have 10 arguments.. much clearer to print the name of
It is not a name, but expression.
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Subject: [Bug target/81084] [8 Regression] powerpcspe port full of confusing configury / command-line options not related to SPE
Date: Mon, 11 Jun 2018 10:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81084
--- Comment #59 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Andrew Jenner from comment #58)
> Acknowledged. I will try to get to that later this week.
Any news on this?
News from Debian's side is that we have upgraded build capacity for powerpcspe
now with two additional e500v2 machines hosted by Turris in Czech Republic (the
guys who make those open source routers).
>From gcc-bugs-return-606924-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 10:54:47 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86099] [9 Regression] internal compiler error: in cx_check_missing_mem_inits, at cp/constexpr.c:815
Date: Mon, 11 Jun 2018 10:54:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-11
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Target Milestone|--- |9.0
Summary|internal compiler error: in |[9 Regression] internal
|cx_check_missing_mem_inits, |compiler error: in
|at cp/constexpr.c:815 |cx_check_missing_mem_inits,
| |at cp/constexpr.c:815
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r261086.
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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86107] New: ICE: in ix86_mitigate_rop, at config/i386/i386.c:42301 with -O -funroll-loops -mavx5124fmaps -mmitigate-rop --param=hot-bb-frequency-fraction=1
Date: Mon, 11 Jun 2018 11:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86107
Bug ID: 86107
Summary: ICE: in ix86_mitigate_rop, at config/i386/i386.c:42301
with -O -funroll-loops -mavx5124fmaps -mmitigate-rop
--param=hot-bb-frequency-fraction=1
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 44258
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44258&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -funroll-loops -mavx5124fmaps -mmitigate-rop
--param=hot-bb-frequency-fraction=1 testcase.c
during RTL pass: mach
testcase.c: In function 'foo':
testcase.c:16:1: internal compiler error: in ix86_mitigate_rop, at
config/i386/i386.c:42301
}
^
0x71c826 ix86_mitigate_rop
/repo/gcc-trunk/gcc/config/i386/i386.c:42301
0x71c826 ix86_reorg
/repo/gcc-trunk/gcc/config/i386/i386.c:42404
0xd4c519 execute
/repo/gcc-trunk/gcc/reorg.c:3975
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.
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-261377-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-261377-checking-yes-rtl-df-extra-amd64
Thread model: posix
gcc version 9.0.0 20180609 (experimental) (GCC)
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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/86102] Include argument name in warning
Date: Mon, 11 Jun 2018 11:06:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonny Grant from comment #2)
> There is no benefit from displaying 'value' '"test"' or 'str' ?
Right. In this case they're short strings, but the arguments to a function can
be arbitrary expressions:
printf("%zu %zu %zu", sizeof(C)+sizeof(D)*2, x.func1()+y.func2(), a-b);
What's the "argument name" here?
The caret diagnostics can highlight the expression, which is preferable to
trying to "name" something without a name, or trying to reconstruct the
expression to print:
... but argument 3 'sizeof(C)+sizeof(D)*2' has type ‘char *’
One of the major advantages of caret diagnostics is avoiding printing arbitrary
expressions in diagnostic text (especially after they've been parsed and munged
into an AST that doesn't necessarily resemble the original code).
>From gcc-bugs-return-606927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 11:34:28 2018
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Subject: [Bug tree-optimization/86097] [8/9 Regression] ICE: verify_gimple failed (error: mismatching comparison operand types)
Date: Mon, 11 Jun 2018 11:34:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-11
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |8.2
Summary|[9 Regression] ICE: |[8/9 Regression] ICE:
|verify_gimple failed |verify_gimple failed
|(error: mismatching |(error: mismatching
|comparison operand types) |comparison operand types)
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This first started to ICE in r254867, with:
internal compiler error: in transform_to_exit_first_loop, at
tree-parloops.c:2004
In r258713 it changed into a checking ICE:
error: mismatching comparison operand types
signed int
unsigned int
if (ivtmp_32 < 3)
during GIMPLE pass: parloops
pr86097.c:4:1: internal compiler error: verify_gimple failed
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
Date: Mon, 11 Jun 2018 11:39:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is controlled by -fabi-version=12 (the default in gcc 8).
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Subject: [Bug fortran/57160] short-circuit IF only with -ffrontend-optimize
Date: Mon, 11 Jun 2018 11:44:00 -0000
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> It is not actually a complete duplicate of PR 85599,
> it is just similar.
What is different?
IMO the two PRs should be closed as WONTFIX.
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
Date: Mon, 11 Jun 2018 11:47:00 -0000
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--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Jun 11 11:47:00 2018
New Revision: 261434
URL: https://gcc.gnu.org/viewcvs?rev=261434&root=gcc&view=rev
Log:
Fix typo done in MPX removal (PR tree-optimization/86089).
2018-06-11 Martin Liska <mliska@suse.cz>
PR tree-optimization/86089
* tree-ssa-strlen.c (get_string_length): Move back removed hunk.
2018-06-11 Martin Liska <mliska@suse.cz>
PR tree-optimization/86089
* gcc.dg/tree-ssa/pr86089.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr86089.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-strlen.c
>From gcc-bugs-return-606931-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 11:47:57 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
Date: Mon, 11 Jun 2018 11:47:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #14 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/85599] Prevent short-circuiting of logical expressions for non-pure functions
Date: Mon, 11 Jun 2018 11:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85599
--- Comment #35 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> gfc_warning(OPT_Wsurprising, "Impure function %qs at %L may not be
> evaluated", ...)
I am perfectly happy with the short-circuit evaluation and I don't want any
warning when I use -Wall.
>From gcc-bugs-return-606933-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 11:51:12 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
Date: Mon, 11 Jun 2018 11:51:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This changed with:
PR c++/80178 - parameter passing for uncopyable classes
* tree.c (type_has_nontrivial_copy_init): True for classes with
only
deleted copy/move ctors.
(remember_deleted_copy, maybe_warn_parm_abi): New.
* decl.c (require_complete_types_for_parms, check_function_type):
Call maybe_warn_parm_abi.
* call.c (convert_for_arg_passing, build_cxx_call): Likewise.
(Which didn't document -fabi-version=12 in invoke.texi)
>From gcc-bugs-return-606934-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 11:52:01 2018
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Subject: [Bug c++/86098] [concepts] canonical types differ for identical types
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-606935-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 11:54:55 2018
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
Date: Mon, 11 Jun 2018 11:54:00 -0000
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--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
-fabi-version=12 is not documented, not mentioned in release notes, and not
wired up in -Wabi.
>From gcc-bugs-return-606936-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 12:07:31 2018
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Subject: [Bug c++/82906] thread_local address not uniqued across shared libraries
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Anders <podbot88 at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Anders <podbot88 at gmail dot com> ---
I have run into this problem while using https://github.com/ReactiveX/RxCpp.
When building test.o with clang, it works.
clang++ --std=c++14 -c -O2 -fPIC test.cpp
readelf -r test.o
Relocation section '.rela.text' at offset 0x170 contains 2 entries:
Offset Info Type Sym. Value Sym. Name +
Addend
000000000005 000500000013 R_X86_64_TLSGD 0000000000000000 _ZZ3foovE1i - 4
00000000000d 000600000004 R_X86_64_PLT32 0000000000000000 __tls_get_addr -
4
Relocation section '.rela.eh_frame' at offset 0x1a0 contains 1 entries:
Offset Info Type Sym. Value Sym. Name +
Addend
000000000020 000300000002 R_X86_64_PC32 0000000000000000 .text + 0
/usr/bin/g++-8 --std=c++14 -c -O2 -fPIC test.cpp
readelf -r test.o
Relocation section '.rela.text' at offset 0x268 contains 3 entries:
Offset Info Type Sym. Value Sym. Name +
Addend
000000000007 000c00000014 R_X86_64_TLSLD 0000000000000000 _ZZ3foovE1i - 4
00000000000c 000d00000004 R_X86_64_PLT32 0000000000000000 __tls_get_addr -
4
000000000016 000c00000015 R_X86_64_DTPOFF32 0000000000000000 _ZZ3foovE1i + 0
Relocation section '.rela.eh_frame' at offset 0x2b0 contains 1 entries:
Offset Info Type Sym. Value Sym. Name +
Addend
000000000020 000200000002 R_X86_64_PC32 0000000000000000 .text + 0
g++ test.o -shared -o test.so
test.so if test.o is build with clang.
000000200fe0 000600000010 R_X86_64_DTPMOD64 0000000000000000 _ZZ3foovE1i + 0
000000200fe8 000600000011 R_X86_64_DTPOFF64 0000000000000000 _ZZ3foovE1i + 0
test.so if test.o is build with gcc.
000000200fc8 000000000010 R_X86_64_DTPMOD64 0
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Subject: [Bug c++/85400] invalid Local Dynamic TLS relaxation for symbol defined in method
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rafael.espindola at gmail dot com
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 82906 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/82906] thread_local address not uniqued across shared libraries
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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Resolution|--- |DUPLICATE
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems this got fixed on the trunk with r260106. The question is if we want to
backport that to release branches too.
*** This bug has been marked as a duplicate of bug 85400 ***
>From gcc-bugs-return-606939-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 14:32:38 2018
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Subject: [Bug c/86102] Include argument name in warning
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86102
--- Comment #5 from Jonny Grant <jg at jguk dot org> ---
Hi Jonathan
I can see what you mean, it doesn't make sense to add more info now I see.
Thank you for closing this request as invalid.
Jonny
>From gcc-bugs-return-606940-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 14:51:37 2018
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/78571] ICE in create_character_initializer, at fortran/data.c:191
Date: Mon, 11 Jun 2018 14:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78571
--- Comment #6 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, Jun 11, 2018 at 07:01:47AM +0000, clyon at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78571
>
> Christophe Lyon <clyon at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |clyon at gcc dot gnu.org
>
> --- Comment #5 from Christophe Lyon <clyon at gcc dot gnu.org> ---
> (In reply to kargl from comment #4)
> > Fixed on trunk and 8-branch. Patch does not apply to 7-branch.
> > Closing.
>
> Hi,
>
> On gcc-8-branch, I've noticed that this patch causes:
> FAIL:gfortran.dg/data_bounds_1.f90 -O (test for excess errors)
> FAIL:gfortran.dg/data_char_1.f90 -O0 (test for excess errors)
Update your branch. There was a 10 minute window
where a part of one patch was accidently committed
to the 8-branch as part of another commit.
>From gcc-bugs-return-606941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 14:57:47 2018
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From: "guillaume at morinfr dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86108] New: crash during unwinding with -O2
Date: Mon, 11 Jun 2018 14:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86108
Bug ID: 86108
Summary: crash during unwinding with -O2
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: guillaume at morinfr dot org
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Created attachment 44259
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44259&action=edit
reproducer
I have a program that crashes very reliably after an exception is thrown. The
code source is attached. It's not as small as I would like but trying to
simplify it significantly makes the crash go away. It crashes very early in
main() though.
Compile with "-std=c++17 -O2" on a GNU/Linux amd64 box, then run "-f RYz1q" to
reproduce.
Starting program: ./repro -f RYz1q
Catchpoint 1 (exception thrown), 0x00007ffff7aeaa4d in __cxa_throw () from
/usr/lib/x86_64-linux-gnu/libstdc++.so.6
(gdb) bt
#0 0x00007ffff7aeaa4d in __cxa_throw () from
/usr/lib/x86_64-linux-gnu/libstdc++.so.6
#1 0x0000000000406371 in RR::RR (this=<optimized out>, _readSize=<optimized
out>, maker=<optimized out>, headerCopy=<optimized out>, start=..., end=...,
_writer=0x0) at repro.cc:1370
#2 0x0000000000402353 in main () at repro.cc:1550
#3 0x00007ffff71bf2e1 in __libc_start_main (main=0x401bc0 <main>, argc=3,
argv=0x7fffffffe018, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fffffffe008) at ../csu/libc-start.c:291
#4 0x0000000000402a1a in _start () at repro.cc:1332
(gdb) c
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff754cdaf in _Unwind_Resume () from
/lib/x86_64-linux-gnu/libgcc_s.so.1
(gdb) bt
#0 0x00007ffff754cdaf in _Unwind_Resume () from
/lib/x86_64-linux-gnu/libgcc_s.so.1
#1 0x000000000040185c in main (argc=<optimized out>, argv=<optimized out>) at
repro.cc:1623
#2 0x00007ffff71bf2e1 in __libc_start_main (main=0x401bc0 <main>, argc=3,
argv=0x7fffffffe018, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fffffffe008) at ../csu/libc-start.c:291
#3 0x0000000000402a1a in _start () at repro.cc:1332
It seems to be a missing null pointer check:
==22653== Command: ./repro -f RYz1q
==22653==
==22653== Invalid read of size 8
==22653== at 0x54CDDAF: _Unwind_Resume (in
/lib/x86_64-linux-gnu/libgcc_s.so.1)
==22653== by 0x40185B: main.cold.131 (repro.cc:1543)
==22653== by 0x56F52E0: (below main) (libc-start.c:291)
==22653== Address 0x40 is not stack'd, malloc'd or (recently) free'd
Using g++ 7.x, -O1 or adding "-fno-reorder-blocks-and-partition" makes the code
work (the exception is caught and the program prints "CAUGHT EXCEPTION - IT
WORKED").
>From gcc-bugs-return-606942-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 14:58:40 2018
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Subject: [Bug fortran/78571] ICE in create_character_initializer, at fortran/data.c:191
Date: Mon, 11 Jun 2018 14:58:00 -0000
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--- Comment #7 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Right, this was fixed by r261367.
Thanks and sorry for the noise.
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Subject: [Bug target/85755] PowerPC Gcc's -mupdate produces inefficient code on power8/power9 machines
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--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Mon Jun 11 15:48:48 2018
New Revision: 261435
URL: https://gcc.gnu.org/viewcvs?rev=261435&root=gcc&view=rev
Log:
rs6000: Put constraints on the correct operand in movdi (PR85755)
Some of the mov* patterns use ^ and $ constraint modifiers, which mean
give a penalty to this alternative if this operand needs a reload. They
are meant here to give a penalty if a register operand needs reloading
(because it needs to be in a different kind of register), not when a
memory operand needs reloading (which is easy and cheap to do).
This patch fixes the movdi patterns. This fixes PR85755.
The following are changed (name, old constraints, new constraints):
FPR store ^m := d m := ^d
FPR move ^d := d ^d := ^d
AVX store ^wY := wb wY := ^wb
AVX store $Z := wv Z := $wv
VSX move ^wi := wi ^wi := ^wi
PR target/85755
* config/rs6000/rs6000.md (*movdi_internal32): Put constraint modifiers
on the correct operand.
(*movdi_internal64): Ditto.
---
gcc/config/rs6000/rs6000.md | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index a2605a0..f06591f 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -8567,16 +8567,16 @@ (define_insn_and_split "reload_gpr_from_vsxsf"
(define_insn "*movdi_internal32"
[(set (match_operand:DI 0 "nonimmediate_operand"
- "=Y, r, r, ^m, ^d, ^d,
- r, ^wY, $Z, ^wb, $wv, ^wi,
+ "=Y, r, r, m, ^d, ^d,
+ r, wY, Z, ^wb, $wv, ^wi,
*wo, *wo, *wv, *wi, *wi, *wv,
*wv")
(match_operand:DI 1 "input_operand"
- "r, Y, r, d, m, d,
- IJKnGHF, wb, wv, wY, Z, wi,
- Oj, wM, OjwM, Oj, wM, wS,
- wB"))]
+ "r, Y, r, ^d, m, ^d,
+ IJKnGHF, ^wb, $wv, wY, Z, ^wi,
+ Oj, wM, OjwM, Oj, wM, wS,
+ wB"))]
"! TARGET_POWERPC64
&& (gpc_reg_operand (operands[0], DImode)
@@ -8643,17 +8643,17 @@ (define_split
(define_insn "*movdi_internal64"
[(set (match_operand:DI 0 "nonimmediate_operand"
"=YZ, r, r, r, r, r,
- ^m, ^d, ^d, ^wY, $Z, $wb,
+ m, ^d, ^d, wY, Z, $wb,
$wv, ^wi, *wo, *wo, *wv, *wi,
*wi, *wv, *wv, r, *h, *h,
?*r, ?*wg, ?*r, ?*wj")
(match_operand:DI 1 "input_operand"
- "r, YZ, r, I, L, nF,
- d, m, d, wb, wv, wY,
- Z, wi, Oj, wM, OjwM, Oj,
- wM, wS, wB, *h, r, 0,
- wg, r, wj, r"))]
+ "r, YZ, r, I, L, nF,
+ ^d, m, ^d, ^wb, $wv, wY,
+ Z, ^wi, Oj, wM, OjwM, Oj,
+ wM, wS, wB, *h, r, 0,
+ wg, r, wj, r"))]
"TARGET_POWERPC64
&& (gpc_reg_operand (operands[0], DImode)
>From gcc-bugs-return-606944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 15:53:57 2018
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-11
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
Ever confirmed|0 |1
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Subject: [Bug target/85755] PowerPC Gcc's -mupdate produces inefficient code on power8/power9 machines
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--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Mon Jun 11 16:06:49 2018
New Revision: 261436
URL: https://gcc.gnu.org/viewcvs?rev=261436&root=gcc&view=rev
Log:
Backport from trunk
2018-06-11 Segher Boessenkool <segher@kernel.crashing.org>
PR target/85755
* config/rs6000/rs6000.md (*movdi_internal32): Put constraint modifiers
on the correct operand.
(*movdi_internal64): Ditto.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/rs6000/rs6000.md
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Subject: [Bug fortran/57160] short-circuit IF only with -ffrontend-optimize
Date: Mon, 11 Jun 2018 16:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57160
--- Comment #8 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #7)
> > It is not actually a complete duplicate of PR 85599,
> > it is just similar.
>
> What is different?
Is "different chunks of code are required" good enough? :-)
> IMO the two PRs should be closed as WONTFIX.
We will discuss it on the mailing list when I submit the patch,
I suppose.
>From gcc-bugs-return-606947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 17:01:44 2018
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/84342] Location views breaks cross builds of arm including gnueabihf
Date: Mon, 11 Jun 2018 17:01:00 -0000
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--- Comment #12 from Jeffrey A. Law <law at redhat dot com> ---
I'm not familiar enough with the ccfsm bits to know if there's something we
ought to be doing generically to improve CC handling further. I think
downgrading to P2 certainly makes sense though.
However, I wouldn't be surprised if we find other instances of this kind of
problem confusing the hell out of the location view support. So I wouldn't dig
at the ccfsm stuff just to allow the compiler to handle view support slightly
more efficiently -- removal of ccfsm should stand on its own.
>From gcc-bugs-return-606948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 17:28:02 2018
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From: "jasminekahuja at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug gcov-profile/86109] New: [GCOV] gcov reports lines in lambdas as not executable
Date: Mon, 11 Jun 2018 17:28:00 -0000
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Bug ID: 86109
Summary: [GCOV] gcov reports lines in lambdas as not executable
Product: gcc
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gcov doesn't report lines in lambdas as executable, so it won't properly report
coverage for lambdas.
$ /xyz/toolchain13/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/xyz/toolchain13/bin/g++
COLLECT_LTO_WRAPPER=/xyz/toolchain13/libexec/gcc/x86_64-pc-linux-gnu/8.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc_8_1_0/configure --prefix=/xyz/toolchain13
--enable-languages=c,c++ --enable-lto --disable-plugin --program-suffix=-8.1.0
--disable-multilib --disable-shared
Thread model: posix
gcc version 8.1.0 (GCC)
$ /xyz/toolchain13/bin/gcov -v
gcov (GCC) 8.1.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.
$ cat hello.cpp
int main()
{
auto partially_uncovered_lambda = [](int i) {
if (i > 10)
return 0;
return 1;
};
partially_uncovered_lambda(20);
}
$ /xyz/toolchain13/bin/g++ -w -fprofile-arcs -ftest-coverage -std=c++17
hello.cpp; ./a.out; /xyz/toolchain13/bin/gcov hello.cpp; cat hello.cpp.gcov
File 'hello.cpp'
Lines executed:100.00% of 3
Creating 'hello.cpp.gcov'
-: 0:Source:hello.cpp
-: 0:Graph:hello.gcno
-: 0:Data:hello.gcda
-: 0:Runs:1
-: 0:Programs:1
1: 1:int main()
-: 2:{
-: 3: auto partially_uncovered_lambda = [](int i) {
-: 4: if (i > 10)
-: 5: return 0;
-: 6: return 1;
-: 7: };
1: 8: partially_uncovered_lambda(20);
1: 9:}
Would expect to see line 6 show up as uncovered.
>From gcc-bugs-return-606949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 17:50:07 2018
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Subject: [Bug driver/80271] Support environment variable CLICOLOR_FORCE to enable -fdiagnostics-color
Date: Mon, 11 Jun 2018 17:50:00 -0000
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Adam Borowski <kilobyte at angband dot pl> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kilobyte at angband dot pl
--- Comment #6 from Adam Borowski <kilobyte at angband dot pl> ---
Created attachment 44260
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44260&action=edit
patch for CLICOLOR_FORCE
So, here's a patch.
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
Date: Mon, 11 Jun 2018 17:52:00 -0000
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Alexander Monakov from comment #3)
> -fabi-version=12 is not documented, not mentioned in release notes, and not
> wired up in -Wabi.
-Wabi=11 warns about this. With an incorrect message, since this is a bug.
I'll also fix the documentation.
>From gcc-bugs-return-606951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 18:24:26 2018
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Subject: [Bug target/85755] PowerPC Gcc's -mupdate produces inefficient code on power8/power9 machines
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--- Comment #10 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Mon Jun 11 18:23:28 2018
New Revision: 261441
URL: https://gcc.gnu.org/viewcvs?rev=261441&root=gcc&view=rev
Log:
gcc/
Backport from mainline
2018-06-08 Peter Bergner <bergner@vnet.ibm.com>
PR target/85755
* config/rs6000/rs6000.c (mem_operand_gpr): Enable PRE_INC and PRE_DEC
addresses.
gcc/testsuite/
Backport from mainline
2018-06-08 Peter Bergner <bergner@vnet.ibm.com>
PR target/85755
* gcc.target/powerpc/pr85755.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/pr85755.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/rs6000/rs6000.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-606952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 18:26:14 2018
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Subject: [Bug target/85755] PowerPC Gcc's -mupdate produces inefficient code on power8/power9 machines
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--- Comment #11 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Mon Jun 11 18:25:37 2018
New Revision: 261442
URL: https://gcc.gnu.org/viewcvs?rev=261442&root=gcc&view=rev
Log:
gcc/
Backport from mainline
2018-06-08 Peter Bergner <bergner@vnet.ibm.com>
PR target/85755
* config/rs6000/rs6000.c (mem_operand_gpr): Enable PRE_INC and PRE_DEC
addresses.
gcc/testsuite/
Backport from mainline
2018-06-08 Peter Bergner <bergner@vnet.ibm.com>
PR target/85755
* gcc.target/powerpc/pr85755.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr85755.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/rs6000/rs6000.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 18:38:52 2018
New Revision: 261444
URL: https://gcc.gnu.org/viewcvs?rev=261444&root=gcc&view=rev
Log:
PR c++/86094 - wrong code with defaulted move ctor.
* tree.c (type_has_nontrivial_copy_init): Fix move ctor handling.
Added:
trunk/gcc/testsuite/g++.dg/abi/invisiref2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/tree.c
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
Date: Mon, 11 Jun 2018 18:40:00 -0000
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--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 18:40:14 2018
New Revision: 261445
URL: https://gcc.gnu.org/viewcvs?rev=261445&root=gcc&view=rev
Log:
PR c++/86094 - wrong code with defaulted move ctor.
* tree.c (type_has_nontrivial_copy_init): Fix move ctor handling.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/abi/invisiref2.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/tree.c
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Subject: [Bug fortran/45521] [F08] GENERIC resolution with ALLOCATABLE/POINTER and PROCEDURE
Date: Mon, 11 Jun 2018 18:45:00 -0000
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--- Comment #20 from janus at gcc dot gnu.org ---
Author: janus
Date: Mon Jun 11 18:44:38 2018
New Revision: 261448
URL: https://gcc.gnu.org/viewcvs?rev=261448&root=gcc&view=rev
Log:
2018-06-11 Janus Weil <janus@gcc.gnu.org>
PR fortran/45521
* interface.c (compare_ptr_alloc): New function.
(generic_correspondence): Call it.
2018-06-11 Janus Weil <janus@gcc.gnu.org>
PR fortran/45521
* gfortran.dg/generic_32.f90: New test.
* gfortran.dg/generic_33.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/generic_32.f90
trunk/gcc/testsuite/gfortran.dg/generic_33.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/interface.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/45521] [F08] GENERIC resolution with ALLOCATABLE/POINTER and PROCEDURE
Date: Mon, 11 Jun 2018 18:47:00 -0000
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--- Comment #21 from janus at gcc dot gnu.org ---
r261448 fixed comments 16 and 17.
Still open: Comment 19.
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Subject: [Bug driver/80271] Support environment variable CLICOLOR_FORCE to enable -fdiagnostics-color
Date: Mon, 11 Jun 2018 18:50:00 -0000
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--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Adam Borowski from comment #6)
> Created attachment 44260 [details]
> patch for CLICOLOR_FORCE
>
> So, here's a patch.
Please send patches to the gcc-patches mailing list for review.
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Subject: [Bug target/85755] PowerPC Gcc's -mupdate produces inefficient code on power8/power9 machines
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Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #12 from Peter Bergner <bergner at gcc dot gnu.org> ---
The PRE_INC and PRE_DEC changes have been backported to GCC 8 and GCC 7, so
this is fixed everywhere.
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Subject: [Bug c++/80485] rejects-valid: constexpr static_cast of pointer-to-member-function to bool
Date: Mon, 11 Jun 2018 18:57:00 -0000
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 18:56:56 2018
New Revision: 261449
URL: https://gcc.gnu.org/viewcvs?rev=261449&root=gcc&view=rev
Log:
PR c++/80485 - inline function non-zero address.
* symtab.c (nonzero_address): Check DECL_COMDAT.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/expr/pmf-3.C
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/symtab.c
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Subject: [Bug fortran/83515] ICE: Invalid expression in gfc_element_size
Date: Mon, 11 Jun 2018 19:19:00 -0000
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G. Steinmetz <gscfq@t-online.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gscfq@t-online.de
--- Comment #3 from G. Steinmetz <gscfq@t-online.de> ---
Simplified :
$ cat z1.f90
module m
type t
contains
procedure :: g => s
end type
contains
function f(x) result(z)
class(*), pointer :: z
end
subroutine s(x, q)
class(t) :: x
procedure(f) :: q
call x%g(q=q)
end
end
$ gfortran-9-20180610 -c z1.f90
f951: internal compiler error: Invalid expression in gfc_element_size.
0x65bfef gfc_internal_error(char const*, ...)
../../gcc/fortran/error.c:1362
0x6f150b gfc_element_size(gfc_expr*)
../../gcc/fortran/target-memory.c:126
0x640228 find_intrinsic_vtab
../../gcc/fortran/class.c:2702
0x640228 gfc_find_vtab(gfc_typespec*)
../../gcc/fortran/class.c:2845
0x66a6d8 compare_actual_formal
../../gcc/fortran/interface.c:2946
0x66c5ae gfc_procedure_use(gfc_symbol*, gfc_actual_arglist**, locus*)
../../gcc/fortran/interface.c:3738
0x6cd415 resolve_specific_s0
../../gcc/fortran/resolve.c:3457
0x6cd415 resolve_specific_s
../../gcc/fortran/resolve.c:3477
0x6cd415 resolve_call
../../gcc/fortran/resolve.c:3631
0x6cd9c3 resolve_typebound_call
../../gcc/fortran/resolve.c:6232
0x6cba4d resolve_typebound_subroutine
../../gcc/fortran/resolve.c:6522
0x6cba4d gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.c:11328
0x6cc95a resolve_codes
../../gcc/fortran/resolve.c:16564
0x6cc857 resolve_codes
../../gcc/fortran/resolve.c:16548
0x6cca5e gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.c:16599
0x6b6464 gfc_parse_file()
../../gcc/fortran/parse.c:6262
0x6fd22f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug fortran/86110] New: ICE in gfc_resolve_character_array_constructor, at fortran/array.c:2044
Date: Mon, 11 Jun 2018 19:21:00 -0000
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Bug ID: 86110
Summary: ICE in gfc_resolve_character_array_constructor, at
fortran/array.c:2044
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
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With invalid code down to gfortran 5 :
$ cat z1.f90
program p
character(:), allocatable :: x, y
x = 'abc'
y = [x(:)]
end
$ cat z2.f90
program p
type t
character(:), allocatable :: c
end type
type(t) :: x, y
x%c = 'abc'
y%c = [x%c(:)]
end
$ gfortran-4.9 -c z1.f90
z1.f90:4.3:
y = [x(:)]
1
Error: Incompatible ranks 0 and 1 in assignment at (1)
$ gfortran-9-20180610 -c z1.f90
f951: internal compiler error: Segmentation fault
0xb4cecf crash_signal
../../gcc/toplev.c:324
0x62fd6a gfc_resolve_character_array_constructor(gfc_expr*)
../../gcc/fortran/array.c:2044
0x6c36c6 gfc_resolve_expr(gfc_expr*)
../../gcc/fortran/resolve.c:6778
0x6c9c0e gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.c:11120
0x6cc95a resolve_codes
../../gcc/fortran/resolve.c:16564
0x6cca5e gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.c:16599
0x6b5f3a resolve_all_program_units
../../gcc/fortran/parse.c:6060
0x6b5f3a gfc_parse_file()
../../gcc/fortran/parse.c:6310
0x6fd22f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-606962-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 19:22:10 2018
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Subject: [Bug fortran/86110] ICE in gfc_resolve_character_array_constructor, at fortran/array.c:2044
Date: Mon, 11 Jun 2018 19:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86110
--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
Detected :
$ cat z3.f90
program p
character(:), allocatable :: x, y
x = 'abc'
y = [x]
end
$ gfortran-9-20180610 -c z3.f90
z3.f90:4:3:
y = [x]
1
Error: Incompatible ranks 0 and 1 in assignment at (1)
>From gcc-bugs-return-606963-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 19:26:05 2018
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Subject: [Bug fortran/86111] New: ICE in gfc_arith_concat, at fortran/arith.c:985
Date: Mon, 11 Jun 2018 19:26:00 -0000
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Bug ID: 86111
Summary: ICE in gfc_arith_concat, at fortran/arith.c:985
Product: gcc
Version: 9.0
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With invalid code, down to at least gfortran 4.8 :
$ cat z1.f90
program p
character(2) :: c = 'a' // [character :: [1]]
end
$ cat z2.f90
program p
real :: c = 'a' // [character :: [1]]
end
$ cat z3.f90
program p
character(2) :: c = 'a' // [character :: 1.0]
end
# ...
$ gfortran-9-20180610 -c z1.f90
f951: internal compiler error: in gfc_arith_concat, at fortran/arith.c:985
0x629922 gfc_arith_concat
../../gcc/fortran/arith.c:985
0x6294b8 reduce_binary_ca
../../gcc/fortran/arith.c:1333
0x629482 reduce_binary_ca
../../gcc/fortran/arith.c:1335
0x6296c4 reduce_binary
../../gcc/fortran/arith.c:1418
0x629ffb eval_intrinsic
../../gcc/fortran/arith.c:1596
0x62a25e eval_intrinsic_f3
../../gcc/fortran/arith.c:1733
0x69204a match_level_3
../../gcc/fortran/matchexp.c:571
0x692134 match_level_4
../../gcc/fortran/matchexp.c:599
0x692134 match_and_operand
../../gcc/fortran/matchexp.c:693
0x6922f2 match_or_operand
../../gcc/fortran/matchexp.c:722
0x6923e2 match_equiv_operand
../../gcc/fortran/matchexp.c:765
0x6924d2 match_level_5
../../gcc/fortran/matchexp.c:811
0x691841 gfc_match_expr(gfc_expr**)
../../gcc/fortran/matchexp.c:870
0x662912 gfc_match_init_expr(gfc_expr**)
../../gcc/fortran/expr.c:2807
0x6504e9 variable_decl
../../gcc/fortran/decl.c:2681
0x6504e9 gfc_match_data_decl()
../../gcc/fortran/decl.c:5893
0x6ab509 match_word_omp_simd
../../gcc/fortran/parse.c:93
0x6aebfe match_word
../../gcc/fortran/parse.c:376
0x6aebfe decode_statement
../../gcc/fortran/parse.c:376
0x6b0b24 next_free
../../gcc/fortran/parse.c:1230
>From gcc-bugs-return-606964-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 20:02:19 2018
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Subject: [Bug tree-optimization/86083] handle non-constant assignments in strlen
Date: Mon, 11 Jun 2018 20:02:00 -0000
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Mon Jun 11 20:01:40 2018
New Revision: 261452
URL: https://gcc.gnu.org/viewcvs?rev=261452&root=gcc&view=rev
Log:
PR tree-optimization/86083 - handle non-constant assignments in strlen
gcc/ChangeLog:
PR tree-optimization/86083
* tree-ssa-strlen.c (handle_char_store): Use tree_expr_nonzero_p.
gcc/testsuite/ChangeLog:
PR tree-optimization/86083
* gcc.dg/strlenopt-44.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/strlenopt-44.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-strlen.c
>From gcc-bugs-return-606965-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 20:02:33 2018
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Subject: [Bug tree-optimization/86083] handle non-constant assignments in strlen
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch committed in r261452.
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Subject: [Bug tree-optimization/83819] [meta-bug] missing strlen optimizations
Date: Mon, 11 Jun 2018 20:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83819
Bug 83819 depends on bug 86083, which changed state.
Bug 86083 Summary: handle non-constant assignments in strlen
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86083
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-606967-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 20:04:41 2018
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Subject: [Bug c/61579] -Wwrite-strings does not behave as a warning option
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Wow, how has it been 4 years already? Maybe this time around then. :)
>From gcc-bugs-return-606968-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 20:19:16 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86111] ICE in gfc_arith_concat, at fortran/arith.c:985
Date: Mon, 11 Jun 2018 20:19:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-11
CC| |kargl at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from kargl at gcc dot gnu.org ---
This can be fixed in arith.c by inspecting the types of the operands, or in
array.c by walking array constructors and inspecting compatibility between a
type-spec and constructor elements.
>From gcc-bugs-return-606969-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 11 20:34:59 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86110] ICE in gfc_resolve_character_array_constructor, at fortran/array.c:2044
Date: Mon, 11 Jun 2018 20:34:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-11
CC| |kargl at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from kargl at gcc dot gnu.org ---
I have a patch.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86112] New: Python printers don't work on Python 2.6
Date: Mon, 11 Jun 2018 20:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86112
Bug ID: 86112
Summary: Python printers don't work on Python 2.6
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
Traceback (most recent call last):
File "blah/libstdc++.so.6.0.25-gdb.py", line 61, in <module>
register_libstdcxx_printers(gdb.current_objfile())
File "blah/../share/gcc-8.1.0/python/libstdcxx/v6/__init__.py", line 28, in
register_libstdcxx_printers
from .printers import register_libstdcxx_printers
File "blah/../share/gcc-8.1.0/python/libstdcxx/v6/printers.py", line 1441
defargs = { n: d.replace('std::', ns) for n,d in defargs.items() }
^
SyntaxError: invalid syntax
The dict comprehension syntax is only supported from Python 2.7 onwards.
It needs to be:
defargs = dict((n, d.replace('std::', ns)) for (n,d) in defargs.items())
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Subject: [Bug c++/85963] [8/9 Regression] false positive "set but not used" warning [-Wunused-but-set-variable]
Date: Mon, 11 Jun 2018 20:52:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
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From: "gfalcon at google dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86113] New: __builtin_nan has "const" attribute
Date: Mon, 11 Jun 2018 21:23:00 -0000
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Bug ID: 86113
Summary: __builtin_nan has "const" attribute
Product: gcc
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__builtin_nan and friends incorrectly have ATTR_CONST. This leads the
optimizer into generating incorrect code. This issue also infects std::nan()
and friends.
The two functions below return different answers in -O1 and above:
double a() {
char buf[4];
buf[0] = buf[1] = buf[2] = '9';
buf[3] = '\0';
return nan(buf);
}
double b() { return nan("999"); }
In a(), the optimizer thinks that nothing reads the contents of `buf`, and
eliminates the assignments. See https://godbolt.org/g/RGHnXQ.
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Subject: [Bug c++/85963] [8/9 Regression] false positive "set but not used" warning [-Wunused-but-set-variable]
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 21:49:30 2018
New Revision: 261458
URL: https://gcc.gnu.org/viewcvs?rev=261458&root=gcc&view=rev
Log:
PR c++/85963 - -Wunused-but-set with ?: in template.
* pt.c (tsubst_copy_and_build) [COND_EXPR]: Call mark_rvalue_use.
Added:
trunk/gcc/testsuite/g++.dg/warn/Wunused-var-34.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
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Subject: [Bug c++/85792] [8/9 Regression] #include <variant> triggers Wctor-dtor-privcay
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 21:49:36 2018
New Revision: 261459
URL: https://gcc.gnu.org/viewcvs?rev=261459&root=gcc&view=rev
Log:
PR c++/85792 -Wctor-dtor-privacy and inherited constructor.
* class.c (maybe_warn_about_overly_private_class): Handle inherited
constructors.
Added:
trunk/gcc/testsuite/g++.dg/warn/Wctor-dtor2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
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Subject: =?UTF-8?B?W0J1ZyBjKysvODU3NjRdIFs4LzkgUmVncmVzc2lvbl0gYm9ndXMg4oCYdGhp?= =?UTF-8?B?c+KAmSB3YXMgbm90IGNhcHR1cmVkIGZvciB0aGlzIGxhbWJkYSBmdW5jdGlv?= =?UTF-8?B?biBlcnJvcg==?Date: Mon, 11 Jun 2018 22:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85764
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 22:02:07 2018
New Revision: 261462
URL: https://gcc.gnu.org/viewcvs?rev=261462&root=gcc&view=rev
Log:
PR c++/85764 - bogus 'this' not captured error.
* lambda.c (resolvable_dummy_lambda): Use nonlambda_method_basetype.
(nonlambda_method_basetype): Handle NSDMI.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp1y/lambda-generic-this2.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/lambda.c
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Subject: [Bug c++/85765] [8/9 Regression] Missing SFINAE in default template argument
Date: Mon, 11 Jun 2018 22:02:00 -0000
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--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 22:02:13 2018
New Revision: 261463
URL: https://gcc.gnu.org/viewcvs?rev=261463&root=gcc&view=rev
Log:
PR c++/85765 - SFINAE and non-type default template arg.
* pt.c (type_unification_real): Do full semantic processing if
substituting a partial args list replaces all template parms.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/fntmpdefarg10.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/pt.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85815] [7/8/9 Regression] incorrect "invalid use of incomplete type" in a lambda on valid code
Date: Mon, 11 Jun 2018 22:02:00 -0000
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 22:01:55 2018
New Revision: 261460
URL: https://gcc.gnu.org/viewcvs?rev=261460&root=gcc&view=rev
Log:
PR c++/85815 - reference to member of enclosing template.
* search.c (lookup_base): Use currently_open_class.
(lookup_member): Use it regardless of -fconcepts.
* parser.c (cp_parser_postfix_dot_deref_expression): Check it.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-dependent1.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/class.c
branches/gcc-8-branch/gcc/cp/parser.c
branches/gcc-8-branch/gcc/cp/search.c
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Subject: [Bug c++/85807] [8/9 Regression] ICEs related to noexcept
Date: Mon, 11 Jun 2018 22:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85807
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 22:02:01 2018
New Revision: 261461
URL: https://gcc.gnu.org/viewcvs?rev=261461&root=gcc&view=rev
Log:
PR c++/85807 - ICE with call in template NSDMI.
* init.c (get_nsdmi): Use push_to/pop_from_top_level.
* tree.c (bot_manip): Don't set_flags_from_callee in a template.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/nsdmi-template17.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/init.c
branches/gcc-8-branch/gcc/cp/tree.c
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-ice14.C
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-nsdmi8.C
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Subject: [Bug c++/85792] [8/9 Regression] #include <variant> triggers Wctor-dtor-privcay
Date: Mon, 11 Jun 2018 22:03:00 -0000
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 22:02:37 2018
New Revision: 261467
URL: https://gcc.gnu.org/viewcvs?rev=261467&root=gcc&view=rev
Log:
PR c++/85792 -Wctor-dtor-privacy and inherited constructor.
* class.c (maybe_warn_about_overly_private_class): Handle inherited
constructors.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/warn/Wctor-dtor2.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/class.c
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Subject: [Bug c++/61806] [C++11] Expression sfinae w/o access gives hard error in partial template specializations
Date: Mon, 11 Jun 2018 22:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61806
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 22:02:19 2018
New Revision: 261464
URL: https://gcc.gnu.org/viewcvs?rev=261464&root=gcc&view=rev
Log:
PR c++/61806 - missed SFINAE with partial specialization.
* cp-tree.h (deferring_access_check_sentinel): Add deferring_kind
parameter to constructor.
* pt.c (instantiate_class_template_1): Enable access checking
before call to most_specialized_partial_spec.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/sfinae63.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/cp-tree.h
branches/gcc-8-branch/gcc/cp/pt.c
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Subject: [Bug c++/85963] [8/9 Regression] false positive "set but not used" warning [-Wunused-but-set-variable]
Date: Mon, 11 Jun 2018 22:03:00 -0000
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 22:02:31 2018
New Revision: 261466
URL: https://gcc.gnu.org/viewcvs?rev=261466&root=gcc&view=rev
Log:
PR c++/85963 - -Wunused-but-set with ?: in template.
* pt.c (tsubst_copy_and_build) [COND_EXPR]: Call mark_rvalue_use.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/warn/Wunused-var-34.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/pt.c
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Subject: [Bug c++/85710] [8/9 Regression] Enabling memset-elt-size warning causes ICE on memset of template member array
Date: Mon, 11 Jun 2018 22:03:00 -0000
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 11 22:02:25 2018
New Revision: 261465
URL: https://gcc.gnu.org/viewcvs?rev=261465&root=gcc&view=rev
Log:
PR c++/85710 - ICE with -Wmemset-elt-size.
c-family/
* c-warn.c (warn_for_memset): Don't crash on incomplete elt type.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/warn/Wmemset-elt-size1.C
Modified:
branches/gcc-8-branch/gcc/c-family/ChangeLog
branches/gcc-8-branch/gcc/c-family/c-warn.c
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86114] New: [8/9 Regression] ICE in gimple_fold_builtin_strlen with an invalid call to strnlen
Date: Mon, 11 Jun 2018 22:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86114
Bug ID: 86114
Summary: [8/9 Regression] ICE in gimple_fold_builtin_strlen
with an invalid call to strnlen
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
GCC 8.1 and 9.0 fail with an ICE on the following invalid test case:
$ cat z.c && gcc -O2 -S -Wall -fdump-tree-optimized=/dev/stdout z.c
extern char* strlen (const char*); // wrong return type
void* f (const char *s)
{
return strlen (s);
}
during GIMPLE pass: forwprop
z.c: In function ‘f’:
z.c:6:1: internal compiler error: in set_range_info, at tree-ssanames.c:378
}
^
0x1297a39 set_range_info(tree_node*, value_range_type,
generic_wide_int<wide_int_ref_storage<false, true> > const&,
generic_wide_int<wide_int_ref_storage<false, true> > const&)
/src/gcc/8-branch/gcc/tree-ssanames.c:378
0xbda3e1 gimple_fold_builtin_strlen
/src/gcc/8-branch/gcc/gimple-fold.c:3551
0xbda8fb gimple_fold_builtin
/src/gcc/8-branch/gcc/gimple-fold.c:3666
0xbdcb58 gimple_fold_call
/src/gcc/8-branch/gcc/gimple-fold.c:4158
0xbdfae8 fold_stmt_1
/src/gcc/8-branch/gcc/gimple-fold.c:4833
0xbe0274 fold_stmt(gimple_stmt_iterator*, tree_node* (*)(tree_node*))
/src/gcc/8-branch/gcc/gimple-fold.c:4986
0x11645f2 execute
/src/gcc/8-branch/gcc/tree-ssa-forwprop.c:2445
Please submit a full bug report,
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86114] [8/9 Regression] ICE in gimple_fold_builtin_strlen with an invalid call to strnlen
Date: Mon, 11 Jun 2018 22:19:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-11
Known to work| |7.3.0
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |8.1.0, 9.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The ICE was introduced in r256457:
r256457 | msebor | 2018-01-10 16:40:14 -0500 (Wed, 10 Jan 2018) | 21 lines
PR tree-optimization/83671 - Fix for false positive reported by
-Wstringop-overflow does not work with inlining
gcc/ChangeLog:
PR tree-optimization/83671
* builtins.c (c_strlen): Unconditionally return zero for the empty
string.
Use -Warray-bounds for warnings.
* gimple-fold.c (get_range_strlen): Handle non-constant lengths
for non-constant array indices with COMPONENT_REF, arrays of
arrays, and pointers to arrays.
(gimple_fold_builtin_strlen): Determine and set length range for
non-constant character arrays.
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Subject: [Bug fortran/44491] Diagnostic just shows "<During initialization>" instead of a locus
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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CC| |kargl at gcc dot gnu.org
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--- Comment #8 from kargl at gcc dot gnu.org ---
I have a patch.
>From gcc-bugs-return-606986-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 01:35:36 2018
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85710] [8/9 Regression] Enabling memset-elt-size warning causes ICE on memset of template member array
Date: Tue, 12 Jun 2018 01:35:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 8.2.
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Subject: [Bug c++/82728] [8 regression] Incorrect -Wunused-but-set-variable warning with a const
Date: Tue, 12 Jun 2018 01:36:00 -0000
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Bug 82728 depends on bug 85963, which changed state.
Bug 85963 Summary: [8/9 Regression] false positive "set but not used" warning [-Wunused-but-set-variable]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85963
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>From gcc-bugs-return-606989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 01:36:51 2018
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Subject: [Bug c++/85792] [8/9 Regression] #include <variant> triggers Wctor-dtor-privcay
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-606987-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 01:36:24 2018
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Subject: [Bug c++/85963] [8/9 Regression] false positive "set but not used" warning [-Wunused-but-set-variable]
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-606990-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 02:49:48 2018
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libfortran/86070] [7 regression] gfortran.dg/fmt_zero_digits.f90 segmentation fault starting with r261077
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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--- Comment #8 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Looking at test results the test results mailing list I see the regression went
away after I committed these patches, so closing as fixed.
>From gcc-bugs-return-606991-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 03:39:27 2018
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/80942] -Woverlength-strings should no longer be implied by -Wpedantic
Date: Tue, 12 Jun 2018 03:39:00 -0000
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--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #7)
> If this bug is fixed, then it should no longer be necessary to explicitly
> specify -Wno-overlength-strings when building GCC itself. I could submit a
> patch removing it from the relevant configure script(s).
Actually instead of just removing it, it might even be possible to switch
-Wno-overlength-strings to -Woverlength-strings; I remember doing a successful
build with it on once. But that's getting sidetracked from this bug...
>From gcc-bugs-return-606992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 03:46:19 2018
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Subject: [Bug c++/33979] support for char16_t, char32_t
Date: Tue, 12 Jun 2018 03:46:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #21 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #20)
> Compiler support for char16_t and char32_t has been complete for many years.
>
> The libstdc++ support required by the standard has been complete since GCC
> 5.1, but I don't know if Paolo had more in mind (we don't implement all
> locale facets for char16_t and char32_t, which means e.g.
> std::basic_stringstream<char16_t> doesn't work, but the standard doesn't
> require it to work).
Changing status to WAITING on Paolo...
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Subject: [Bug target/65416] xtensa: memory allocated by alloca is used before the stack pointer is updated
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jcmvbkbc at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-12
Assignee|unassigned at gcc dot gnu.org |jcmvbkbc at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from jcmvbkbc at gcc dot gnu.org ---
Created attachment 44261
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44261&action=edit
minimized reproducer source for gcc-8.1
cc1 -funsigned-char -fno-builtin -fno-asm -fmerge-all-constants -std=gnu99
-fno-stack-protector -Os -fstrict-aliasing -mlongcalls -mauto-litpools
-fno-omit-frame-pointer -fdump-tree-all ldso.i
produces assembly with the same pattern in it:
addi a8, sp, -16
l32i.n a10, a5, 4
s32i.n a9, a8, 0
l32i.n a9, a5, 8
movsp sp, a8
Configured with: ../gcc/configure --target=xtensa-buildroot-linux-uclibc
--disable-shared --disable-libssp --disable-libisl --enable-languages=c
--enable-debug CFLAGS='-O0 -g3' CXXFLAGS='-O0 -g3' LDFLAGS=-g3
>From gcc-bugs-return-606994-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 07:17:39 2018
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Subject: [Bug fortran/86115] New: move_alloc for class(*) containing value of type character(len=*) looses data
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86115
Bug ID: 86115
Summary: move_alloc for class(*) containing value of type
character(len=*) looses data
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: mscfd at gmx dot net
Target Milestone: ---
related: bug 72790
Applying move_alloc(x,y) for x and y both declared as class(*) and x currently
containing a string (character(len=...)) fails. The type seems to be
transfered, but the value is empty.
Test case, which shows that for integer variables move_alloc works as expected,
but which fails for strings:
program movealloc
class(*), allocatable :: x, y, s, t
allocate(x, source=1234)
allocate(s, source='5678')
call p(x)
call p(y)
call p(s)
call p(t)
call move_alloc(x, y)
call move_alloc(s, t)
print *,'---'
call p(x)
call p(y)
call p(s)
call p(t)
contains
subroutine p(z)
class(*), allocatable, intent(in) :: z
if (allocated(z)) then
select type(z)
type is (character(len=*))
print *, 'string: ', z
type is (integer)
print *, 'integer: ', z
class default
print *, 'unknown type'
end select
else
print *, 'not allocated'
end if
end subroutine p
end program
expected output (confirmed with ifort):
integer: 1234
not allocated
string: 5678
not allocated
---
not allocated
integer: 1234
not allocated
string: 5678
gfortran output:
integer: 1234
not allocated
string: 5678
not allocated
---
not allocated
integer: 1234
not allocated
string:
(not that it does not report 'unknown type')
>From gcc-bugs-return-606995-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 07:47:17 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86107] [9 Regression] ICE: in ix86_mitigate_rop, at config/i386/i386.c:42301 with -O -funroll-loops -mavx5124fmaps -mmitigate-rop --param=hot-bb-frequency-fraction=1
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-12
CC| |marxin at gcc dot gnu.org,
| |uros at gcc dot gnu.org
Known to work| |8.1.0
Summary|ICE: in ix86_mitigate_rop, |[9 Regression] ICE: in
|at config/i386/i386.c:42301 |ix86_mitigate_rop, at
|with -O -funroll-loops |config/i386/i386.c:42301
|-mavx5124fmaps |with -O -funroll-loops
|-mmitigate-rop |-mavx5124fmaps
|--param=hot-bb-frequency-fr |-mmitigate-rop
|action=1 |--param=hot-bb-frequency-fr
| |action=1
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r259701.
>From gcc-bugs-return-606996-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 07:55:19 2018
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Subject: [Bug gcov-profile/86109] [8/9 Regression] gcov reports lines in lambdas as not executable
Date: Tue, 12 Jun 2018 07:55:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-12
Known to work| |7.3.0
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Summary|[GCOV] gcov reports lines |[8/9 Regression] gcov
|in lambdas as not |reports lines in lambdas as
|executable |not executable
Ever confirmed|0 |1
Known to fail| |8.1.0, 9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, regressed with r254562.
>From gcc-bugs-return-606997-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 08:04:34 2018
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Subject: [Bug c++/33979] support for char16_t, char32_t
Date: Tue, 12 Jun 2018 08:04:00 -0000
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----------------------------------------------------------------------------
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--- Comment #22 from Paolo Carlini <paolo.carlini at oracle dot com> ---
I don't have much to add, I'm sure Jonathan will make the best decisions about
this issue.
>From gcc-bugs-return-606998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 08:43:59 2018
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Subject: [Bug fortran/86116] New: Ambiguous generic interface not recognised
Date: Tue, 12 Jun 2018 08:43:00 -0000
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Bug ID: 86116
Summary: Ambiguous generic interface not recognised
Product: gcc
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The following module should not compile. Calling sub(z) with z declared as
"type(t), allocatable :: z" shows the ambiguity.
Replacing "type(t) :: x" by "integer :: x" in the definition of s1 gives the
expected error "Ambiguous interfaces in generic interface 'sub' for ‘s1’ at (1)
and ‘s2’ at (2)".
module mod
private
public sub
type, public :: t
end type t
interface sub
module procedure s1
module procedure s2
end interface sub
contains
subroutine s1(x)
type(t) :: x
! with integer, gfortran recognises the ambiguity
! integer :: x
end subroutine s1
subroutine s2(x)
class(*), allocatable :: x
end subroutine s2
end module mod
>From gcc-bugs-return-606999-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 09:20:06 2018
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Subject: [Bug target/86107] [9 Regression] ICE: in ix86_mitigate_rop, at config/i386/i386.c:42301 with -O -funroll-loops -mavx5124fmaps -mmitigate-rop --param=hot-bb-frequency-fraction=1
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--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
For some reason, this part of x86_mitigate_rop:
int n_uses;
reg_class superclass = regrename_find_superclass (head, &n_uses,
&unavailable);
old_reg = head->regno;
best_reg = find_rename_reg (head, superclass, &unavailable,
old_reg, false);
bool ok = regrename_do_replace (head, best_reg);
gcc_assert (ok);
if (dump_file)
fprintf (dump_file, "Chain %d renamed as %s in %s\n", head->id,
reg_names[best_reg], reg_class_names[superclass]);
does not validate in regrename_do_replace.
The compiler wants to rename:
(insn 1264 1263 1265 5 (set (reg:DI 22 xmm1 [594])
(reg:DI 3 bx [594])) "pr86107.c":15 85 {*movdi_internal}
(expr_list:REG_DEAD (reg:DI 3 bx [594])
(nil)))
to:
(set (reg:DI 22 xmm1 [594])
(reg:DI 1 dx [594]))
and fails validation of new instruction.
The alternative 20 in *movdi_internal (*v->?r) is marked with
preferred_for_speed attribute:
(set (attr "preferred_for_speed")
(cond [(eq_attr "alternative" "10,17,19")
(symbol_ref "TARGET_INTER_UNIT_MOVES_FROM_VEC")
(eq_attr "alternative" "11,18,20")
(symbol_ref "TARGET_INTER_UNIT_MOVES_TO_VEC")
]
(symbol_ref "true")))
but should not fail verification even for !TARGET_INTER_UNIT_MOVES_TO_VEC
targets. As a matter of fact, the compilation works with -mtune=intel.
It looks to me that preferred_for_speed attribute handling is at fault here.
>From gcc-bugs-return-607000-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 09:21:41 2018
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Subject: [Bug debug/84342] Location views breaks cross builds of arm including gnueabihf
Date: Tue, 12 Jun 2018 09:21:00 -0000
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--- Comment #13 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #12)
> I'm not familiar enough with the ccfsm bits to know if there's something we
> ought to be doing generically to improve CC handling further. I think
> downgrading to P2 certainly makes sense though.
>
> However, I wouldn't be surprised if we find other instances of this kind of
> problem confusing the hell out of the location view support. So I wouldn't
> dig at the ccfsm stuff just to allow the compiler to handle view support
> slightly more efficiently -- removal of ccfsm should stand on its own.
Agreed about the removal of ccfsm support standing on it's own. I do wonder if
doing that will have the side benefit of not having these kinds of issues.
IIRC arc (from the days I worked on it) has ccfsm similar to arm, so maybe the
same problem will bite us on other ports as well.
>From gcc-bugs-return-607001-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 09:24:55 2018
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Subject: [Bug rtl-optimization/86107] [9 Regression] ICE: in ix86_mitigate_rop, at config/i386/i386.c:42301 with -O -funroll-loops -mavx5124fmaps -mmitigate-rop --param=hot-bb-frequency-fraction=1
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Uroš Bizjak <ubizjak at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |richard.sandiford at linaro dot or
| |g
Component|target |rtl-optimization
Target Milestone|--- |9.0
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
Looks like a rtl-optimization problem with handling of preferred-for-speed
attribute.
CC author.
>From gcc-bugs-return-607002-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 09:40:04 2018
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From: "mscfd at gmx dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86117] New: bogus warning maybe-uninitialized with class(*) and source argument in allocate
Date: Tue, 12 Jun 2018 09:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86117
Bug ID: 86117
Summary: bogus warning maybe-uninitialized with class(*) and
source argument in allocate
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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Compiling the following module with
gfortran -Og -Wall -fcheck=all -c mod.f90
gives
Warning: ‘<anonymous>’ may be used uninitialized in this function
[-Wmaybe-uninitialized]
When leaving out any one of the three options -Og, -Wall or -fcheck=all the
warning disappears.
When replacing class(*) with integer the warning also disappears.
When using scalars for a and b (omitting the dimension(:) part and the do loop)
the warning also disappears.
module mod
private
public sub
type, public :: generic
class(*), allocatable :: item
! with integer instead of class(*), there is no warning
! integer, allocatable :: item
end type generic
contains
subroutine sub(a, b)
type(generic), dimension(:), intent(in) :: a
type(generic), dimension(:), intent(out) :: b
integer :: i
do i = 1, 10
allocate(b(i)%item, source=a(i)%item)
end do
end subroutine sub
end module mod
>From gcc-bugs-return-607003-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 10:25:39 2018
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From: "oleksandr.krol at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86118] New: Gcc segfault for big c++ data compilation
Date: Tue, 12 Jun 2018 10:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86118
Bug ID: 86118
Summary: Gcc segfault for big c++ data compilation
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
5.4.0-6ubuntu1~16.04.9' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.9)
-----------------------------------------------------------------------
compilation command:
/usr/local/bin/mpic++ --save-temps -DQT_CORE_LIB -DQT_NO_DEBUG -isystem
/usr/include/x86_64-linux-gnu/qt5 -isystem
/usr/include/x86_64-linux-gnu/qt5/QtCore -isystem
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -Wall -Wextra -std=c++11
-O2 -fPIC -fPIC -o ./idfs.cc.o -c ./idfs.cc
-----------------------------------------------------------------------
compiler output:
g++: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
>From gcc-bugs-return-607004-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 10:49:41 2018
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Subject: [Bug c++/86118] Gcc segfault for big c++ data compilation
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--- Comment #1 from ÐлекÑандр Кроль <oleksandr.krol at gmail dot com> ---
Created attachment 44262
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44262&action=edit
preprocessed file that triggers the bug
Due to size limit following command sequence was done:
1. bzip2 -k ./idfs.ii
2. tar -c -M --tape-length=1000 --file=idfs1.tar.gz ./idfs.ii.bz2
^GPrepare volume #2 for ‘idfs1.tar.gz’ and hit return: n idfs2.tar.gz
>From gcc-bugs-return-607005-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 10:50:28 2018
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Subject: [Bug c++/86118] Gcc segfault for big c++ data compilation
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--- Comment #2 from ÐлекÑандр Кроль <oleksandr.krol at gmail dot com> ---
Created attachment 44263
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second volume of preprocessed file
Due to size limit following command sequence was done:
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>From gcc-bugs-return-607006-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 11:09:30 2018
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From: "hjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libitm/85988] Incorrect offsets of __private_tm and pointer_guard
Date: Tue, 12 Jun 2018 11:09:00 -0000
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--- Comment #2 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Jun 12 11:08:52 2018
New Revision: 261491
URL: https://gcc.gnu.org/viewcvs?rev=261491&root=gcc&view=rev
Log:
libitm/x86: Correct offsets of __private_tm and pointer_guard
In glibc, sysdeps/i386/nptl/tls.h has
typedef struct
{
void *tcb; /* Pointer to the TCB. Not necessarily the
thread descriptor used by libpthread. */
dtv_t *dtv;
void *self; /* Pointer to the thread descriptor. */
int multiple_threads;
uintptr_t sysinfo;
uintptr_t stack_guard;
uintptr_t pointer_guard;
int gscope_flag;
int __glibc_reserved1;
/* Reservation of some values for the TM ABI. */
void *__private_tm[4];
/* GCC split stack support. */
void *__private_ss;
} tcbhead_t;
and sysdeps/x86_64/nptl/tls.h has
typedef struct
{
void *tcb; /* Pointer to the TCB. Not necessarily the
thread descriptor used by libpthread. */
dtv_t *dtv;
void *self; /* Pointer to the thread descriptor. */
int multiple_threads;
int gscope_flag;
uintptr_t sysinfo;
uintptr_t stack_guard;
uintptr_t pointer_guard;
unsigned long int vgetcpu_cache[2];
int __glibc_reserved1;
int __glibc_unused1;
/* Reservation of some values for the TM ABI. */
void *__private_tm[4];
/* GCC split stack support. */
void *__private_ss;
long int __glibc_reserved2;
/* Must be kept even if it is no longer used by glibc since programs,
like AddressSanitizer, depend on the size of tcbhead_t. */
__128bits __glibc_unused2[8][4] __attribute__ ((aligned (32)));
void *__padding[8];
} tcbhead_t;
The offsets of __private_tm are
i386: 36 bytes
x32: 48 bytes
x86_64: 80 bytes
and the offsets of pointer_guard are:
i386: 24 bytes
x32: 28 bytes
x86_64: 48 bytes
But config/linux/x86/tls.h had
#ifdef __x86_64__
#ifdef __LP64__
# define SEG_READ(OFS) "movq\t%%fs:(" #OFS "*8),%0"
# define SEG_WRITE(OFS) "movq\t%0,%%fs:(" #OFS "*8)"
# define SEG_DECODE_READ(OFS) SEG_READ(OFS) "\n\t" \
"rorq\t$17,%0\n\t" \
"xorq\t%%fs:48,%0"
# define SEG_ENCODE_WRITE(OFS) "xorq\t%%fs:48,%0\n\t" \
"rolq\t$17,%0\n\t" \
SEG_WRITE(OFS)
#else
// For X32.
# define SEG_READ(OFS) "movl\t%%fs:(" #OFS "*4),%0"
# define SEG_WRITE(OFS) "movl\t%0,%%fs:(" #OFS "*4)"
# define SEG_DECODE_READ(OFS) SEG_READ(OFS) "\n\t" \
"rorl\t$9,%0\n\t" \
"xorl\t%%fs:24,%0"
# define SEG_ENCODE_WRITE(OFS) "xorl\t%%fs:24,%0\n\t" \
"roll\t$9,%0\n\t" \
SEG_WRITE(OFS)
#endif
#else
# define SEG_READ(OFS) "movl\t%%gs:(" #OFS "*4),%0"
# define SEG_WRITE(OFS) "movl\t%0,%%gs:(" #OFS "*4)"
# define SEG_DECODE_READ(OFS) SEG_READ(OFS) "\n\t" \
"rorl\t$9,%0\n\t" \
"xorl\t%%gs:24,%0"
# define SEG_ENCODE_WRITE(OFS) "xorl\t%%gs:24,%0\n\t" \
"roll\t$9,%0\n\t" \
SEG_WRITE(OFS)
#endif
static inline struct gtm_thread *gtm_thr(void)
{
struct gtm_thread *r;
asm volatile (SEG_READ(10) : "=r"(r));
return r;
}
static inline void set_gtm_thr(struct gtm_thread *x)
{
asm volatile (SEG_WRITE(10) : : "r"(x));
}
static inline struct abi_dispatch *abi_disp(void)
{
struct abi_dispatch *r;
asm volatile (SEG_DECODE_READ(11) : "=r"(r));
return r;
}
static inline void set_abi_disp(struct abi_dispatch *x)
{
void *scratch;
asm volatile (SEG_ENCODE_WRITE(11) : "=r"(scratch) : "0"(x));
}
SEG_READ, SEG_WRITE, SEG_DECODE_READ and SEG_ENCODE_WRITE were correct
only for x86-64.
Update SEG_READ and SEG_WRITE to use the offset of __private_tm as base
and correct the offset of pointer_guard for x32. This patch doesn't
change ABI of libitm.
PR libitm/85988
* config/linux/x86/tls.h (SEG_READ): Use the offset of
__private_tm as base.
(SEG_WRITE): Likewise.
(SEG_ENCODE_WRITE): Correct the offset of pointer_guard for x32.
(gtm_thr): Replace SEG_READ(10) with SEG_READ(0).
(set_gtm_thr): Replace SEG_WRITE(10) with SEG_WRITE(0).
(abi_disp): Replace SEG_DECODE_READ(11) with SEG_DECODE_READ(1).
(set_abi_disp): Replace SEG_ENCODE_WRITE(11) with
SEG_ENCODE_WRITE(1).
Modified:
trunk/libitm/ChangeLog
trunk/libitm/config/linux/x86/tls.h
>From gcc-bugs-return-607007-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 11:40:30 2018
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Subject: [Bug fortran/86119] New: Intrinsic len has wrong type if used within select type for a class(*) string
Date: Tue, 12 Jun 2018 11:40:00 -0000
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Bug ID: 86119
Summary: Intrinsic len has wrong type if used within select
type for a class(*) string
Product: gcc
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Target Milestone: ---
The following program, compiled with -Wall gives the warning
l2 = len(s)
1
Warning: Possible change of value in conversion from INTEGER(8) to INTEGER(4)
at (1) [-Wconversion]
(No warning for len_trim!)
This is directly related to the use of select type in conjunction with
class(*).
If s is declared as character(len=:) and the select type block is removed, then
there is no warning.
program proglen
implicit none
class(*), allocatable :: s
integer :: l1, l2
allocate(s, source = '123 ')
select type(s)
type is (character(len=*))
l1 = len_trim(s)
l2 = len(s)
end select
end program proglen
>From gcc-bugs-return-607008-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 12:09:19 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++/33979] support for char16_t, char32_t
Date: Tue, 12 Jun 2018 12:09:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #23 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #20)
> The libstdc++ support required by the standard has been complete since GCC
> 5.1, but I don't know if Paolo had more in mind (we don't implement all
> locale facets for char16_t and char32_t, which means e.g.
> std::basic_stringstream<char16_t> doesn't work, but the standard doesn't
> require it to work).
We have PR 78486 requesting that (but I have no plans to work on it myself).
Let's close this one, everything required by the standard works.
>From gcc-bugs-return-607009-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 14:48:53 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++/86118] Gcc segfault for big c++ data compilation
Date: Tue, 12 Jun 2018 14:48:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-06-12
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Can you please provide steps to merge it back and extract?
>From gcc-bugs-return-607010-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 15:32:18 2018
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From: "andrey.vihrov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/58646] ICE on a multidimensional VLA with an empty initializer list
Date: Tue, 12 Jun 2018 15:32:00 -0000
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Andrey Vihrov <andrey.vihrov at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andrey.vihrov at gmail dot com
--- Comment #8 from Andrey Vihrov <andrey.vihrov at gmail dot com> ---
Still happening with g++ (GCC) 8.1.1 20180531.
The first sample from description gives
x.cpp: In function 'void foo(int)':
x.cpp:3:7: internal compiler error: in make_decl_rtl, at varasm.c:1322
int a[2][n] = {};
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.archlinux.org/> for instructions.
>From gcc-bugs-return-607011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 15:35:55 2018
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for GCC 9.
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Subject: [Bug target/85990] Wrong TARGET_THREAD_SPLIT_STACK_OFFSET
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85990
--- Comment #2 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Jun 12 15:35:22 2018
New Revision: 261501
URL: https://gcc.gnu.org/viewcvs?rev=261501&root=gcc&view=rev
Log:
Linux/x86: Update TARGET_THREAD_SPLIT_STACK_OFFSET comments
Glibc 2.18 was changed by
commit ecbf434213c0333d81706074e4d107ac45011635
Author: Andreas Jaeger <aj@suse.de>
Date: Wed May 15 20:20:54 2013 +0200
Reserve new TLS field for x86 and x86_64
[BZ #10686]
* sysdeps/x86_64/tls.h (struct tcbhead_t): Add __private_ss
field.
* sysdeps/i386/tls.h (struct tcbhead_t): Likewise.
to reduce the size of __private_tm to make room for __private_ss, which
was supposed to be used for TARGET_THREAD_SPLIT_STACK_OFFSET:
typedef struct
{
void *tcb; /* Pointer to the TCB. Not necessarily the
thread descriptor used by libpthread. */
dtv_t *dtv;
void *self; /* Pointer to the thread descriptor. */
int multiple_threads;
uintptr_t sysinfo;
uintptr_t stack_guard;
uintptr_t pointer_guard;
int gscope_flag;
int __glibc_reserved1;
/* Reservation of some values for the TM ABI. */
void *__private_tm[4];
/* GCC split stack support. */
void *__private_ss;
} tcbhead_t;
But the offset of __private_ss for i386 was mistakenly set to 0x30,
instead of 0x34 and libgcc/config/i386/morestack.S has:
cmpl %gs:0x30,%eax # See if we have enough space.
movl %eax,%gs:0x30 # Save the new stack boundary.
movl %eax,%gs:0x30 # Save the new stack boundary.
movl %ecx,%gs:0x30 # Save new stack boundary.
movl %eax,%gs:0x30
movl %gs:0x30,%eax
movl %eax,%gs:0x30
Since update TARGET_THREAD_SPLIT_STACK_OFFSET changes split stack ABI,
glibc 2.28 has been changed by
commit 0221ce2a90be2d40fc90f0b5dcec77a1ec013f53
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Tue Jun 12 06:23:28 2018 -0700
i386: Change offset of __private_ss to 0x30 [BZ #23250]
to match GCC:
typedef struct
{
void *tcb; /* Pointer to the TCB. Not necessarily the
thread descriptor used by libpthread. */
dtv_t *dtv;
void *self; /* Pointer to the thread descriptor. */
int multiple_threads;
uintptr_t sysinfo;
uintptr_t stack_guard;
uintptr_t pointer_guard;
int gscope_flag;
int __glibc_reserved1;
/* Reservation of some values for the TM ABI. */
void *__private_tm[3];
/* GCC split stack support. */
void *__private_ss;
void *__glibc_reserved2;
} tcbhead_t;
PR target/85990
* config/i386/gnu-user.h (TARGET_THREAD_SPLIT_STACK_OFFSET):
Update comments.
* config/i386/gnu-user64.h (TARGET_THREAD_SPLIT_STACK_OFFSET):
Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/gnu-user.h
trunk/gcc/config/i386/gnu-user64.h
>From gcc-bugs-return-607013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 16:23:21 2018
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From: "simon.kluepfel at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86120] New: SIGSEGV without backtrace when using submodules
Date: Tue, 12 Jun 2018 16:23:00 -0000
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Bug ID: 86120
Summary: SIGSEGV without backtrace when using submodules
Product: gcc
Version: 7.3.0
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Created attachment 44264
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44264&action=edit
source code
The attached code does not run as expected when compiling with -O3 using
gfortran 6 and 7. For gfortran-6 a write statement to a file inside the routine
"fixes" the segfault. Works for gfortran-8.
Moving the submodule into the module, or not using the str_set routine avoids
the segfault as well.
compiled with:
gfortran-XXX -O3 -std=f2008 -g -fbacktrace -fcheck=all string.f03 dt.f03
dt_sub.f03 main.f03
for XXX=
gcc version 6.4.0 20180424 (Debian 6.4.0-17)
gcc version 7.3.0 (Debian 7.3.0-21)
gcc version 8.1.0 (Debian 8.1.0-5)
output expected / v. 8:
$ ./a.out
1 2
1 2
1 2
$
v. 7:
$ ./a.out
1 2
1 2
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
#0 0x7f8c0df6e0fd in ???
#1 0x7f8c0df6d343 in ???
#2 0x7f8c0d3e2eff in ???
#3 0x0 in ???
Segmentation fault
v. 6:
$ ./a.out
1 2
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
#0 0x7f1cbf72dced in ???
#1 0x7f1cbf72cf4d in ???
#2 0x7f1cbeba1eff in ???
#3 0x0 in ???
Segmentation fault
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/85931] -Wsizeof-pointer-memaccess for strncpy with size of source
Date: Tue, 12 Jun 2018 17:15:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Jun 12 17:14:31 2018
New Revision: 261515
URL: https://gcc.gnu.org/viewcvs?rev=261515&root=gcc&view=rev
Log:
PR c/85931 - -Wsizeof-pointer-memaccess for strncpy with size of source
gcc/c-family/ChangeLog:
PR c/85931
* c-warn.c (sizeof_pointer_memaccess_warning): Avoid warning when
sizeof source and destination yields the same value.
gcc/ChangeLog:
PR c/85931
* fold-const.c (operand_equal_p): Handle SAVE_EXPR.
gcc/testsuite/ChangeLog:
PR c/85931
* gcc.dg/Wstringop-truncation-3.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/Wstringop-truncation-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-warn.c
trunk/gcc/fold-const.c
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Subject: [Bug c/85931] -Wsizeof-pointer-memaccess for strncpy with size of source
Date: Tue, 12 Jun 2018 17:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85931
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Known to fail|9.0 |
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch committed into trunk in r261515.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/86121] New: [9 Regression] missing -Wstringop-overflow on strcpy followed by strcat
Date: Tue, 12 Jun 2018 17:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86121
Bug ID: 86121
Summary: [9 Regression] missing -Wstringop-overflow on strcpy
followed by strcat
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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GCC 7 and 8 correctly diagnose the buffer overflow in the test case below by
issuing -Wstringop-overflow. However, in the current trunk of GCC 9 the
warning fails to detect the same bug (GCC 9 issues -Warray-bounds instead).
$ cat c.c && gcc -O2 -S -Wstringop-overflow -fdump-tree-optimized=/dev/stdout
c.c
#define bos1(p) __builtin_object_size (p, 1)
#define strcat(d, s) __builtin___strcat_chk (d, s, bos1 (d))
#define strcpy(d, s) __builtin___strcpy_chk (d, s, bos1 (d))
char a[2];
void test_strcpy_strcat_2 (void)
{
strcpy (a, "12");
strcat (a, "3");
}
;; Function test_strcpy_strcat_2 (test_strcpy_strcat_2, funcdef_no=0,
decl_uid=1897, cgraph_uid=1, symbol_order=1)
test_strcpy_strcat_2 ()
{
<bb 2> [local count: 1073741825]:
MEM[(char * {ref-all})&a] = MEM[(char * {ref-all})"12"];
MEM[(char * {ref-all})&a + 2B] = MEM[(char * {ref-all})"3"];
return;
}
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Subject: [Bug fortran/44491] Diagnostic just shows "<During initialization>" instead of a locus
Date: Tue, 12 Jun 2018 17:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44491
--- Comment #9 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Tue Jun 12 17:55:24 2018
New Revision: 261516
URL: https://gcc.gnu.org/viewcvs?rev=261516&root=gcc&view=rev
Log:
2018-06-12 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/44491
* expr.c (gfc_check_assign): Select non-NULL locus.
2018-06-12 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/44491
* gfortran.dg/pr44491.f90: New testcase
Added:
trunk/gcc/testsuite/gfortran.dg/pr44491.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/86121] [9 Regression] missing -Wstringop-overflow on strcpy followed by strcat
Date: Tue, 12 Jun 2018 17:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86121
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The problem is due to the MEM_REF that the strcat() call is transformed into.
Prior to GCC 9 the strcat() call would be transformed to memcpy() like so:
MEM[(char * {ref-all})&a] = MEM[(char * {ref-all})"12"];
__builtin_memcpy (&MEM[(void *)&a + 2B], "3", 2); [tail call]
Bisection points to the following commit as the cause of the change:
r261061 | rguenth | 2018-06-01 06:49:54 -0400 (Fri, 01 Jun 2018) | 8 lines
2018-06-01 Richard Biener <rguenther@suse.de>
PR middle-end/86017
* gimple-fold.c (var_decl_component_p): Also allow offsetted
vars wrapped in MEM_REFs.
* gcc.dg/tree-ssa/pr86017.c: New testcase.
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Subject: [Bug middle-end/86121] [9 Regression] missing -Wstringop-overflow on strcpy followed by strcat
Date: Tue, 12 Jun 2018 18:01:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=85259
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The regression was uncovered by a test for the fix for bug 85259.
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Subject: [Bug fortran/44491] Diagnostic just shows "<During initialization>" instead of a locus
Date: Tue, 12 Jun 2018 18:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44491
--- Comment #10 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Tue Jun 12 18:05:05 2018
New Revision: 261517
URL: https://gcc.gnu.org/viewcvs?rev=261517&root=gcc&view=rev
Log:
2018-06-12 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/44491
* expr.c (gfc_check_assign): Select non-NULL locus.
2018-06-12 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/44491
* gfortran.dg/pr44491.f90: New testcase
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr44491.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/expr.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/85259] [8/9 Regression] Missing -Wstringop-overflow= since r256683
Date: Tue, 12 Jun 2018 18:05:00 -0000
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Jun 12 18:05:13 2018
New Revision: 261518
URL: https://gcc.gnu.org/viewcvs?rev=261518&root=gcc&view=rev
Log:
PR tree-optimization/85259 - Missing -Wstringop-overflow= since r256683
gcc/ChangeLog:
PR tree-optimization/85259
* builtins.c (compute_objsize): Handle constant offsets.
* gimple-ssa-warn-restrict.c (maybe_diag_offset_bounds): Return
true iff a warning has been issued.
* gimple.h (gimple_nonartificial_location): New function.
* tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Call
gimple_nonartificial_location and handle -Wno-system-headers.
(handle_builtin_stxncpy): Same.
gcc/testsuite/ChangeLog:
PR tree-optimization/85259
* gcc.dg/Wstringop-overflow-5.c: New test.
* gcc.dg/Wstringop-overflow-6.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/Wstringop-overflow-5.c
trunk/gcc/testsuite/gcc.dg/Wstringop-overflow-6.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/gimple-ssa-warn-restrict.c
trunk/gcc/gimple.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-strlen.c
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Subject: [Bug fortran/44491] Diagnostic just shows "<During initialization>" instead of a locus
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--- Comment #11 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Tue Jun 12 18:19:03 2018
New Revision: 261519
URL: https://gcc.gnu.org/viewcvs?rev=261519&root=gcc&view=rev
Log:
2018-06-12 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/44491
* gfortran.dg/pr44491.f90: Add dg-options omitted in previous commit.
Modified:
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr44491.f90
>From gcc-bugs-return-607023-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 18:21:11 2018
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Subject: [Bug fortran/67883] ICE on empty array constructor of character function
Date: Tue, 12 Jun 2018 18:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67883
G. Steinmetz <gscfq@t-online.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gscfq@t-online.de
--- Comment #6 from G. Steinmetz <gscfq@t-online.de> ---
(In reply to kargl from comment #4 and #5)
> trunk can now compile this code.
Confirming that ICE is gone for this group of sources.
> ... as I think gfortran might be correct.
Agreed, it's reasonable and necessary to reject character(*)
and character(:) as type-spec in an array constructor.
PR could be closed, thanks.
>From gcc-bugs-return-607025-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 18:23:28 2018
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/67883] ICE on empty array constructor of character function
Date: Tue, 12 Jun 2018 18:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67883
--- Comment #7 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Tue, Jun 12, 2018 at 06:21:06PM +0000, gscfq@t-online.de wrote:
>
> --- Comment #6 from G. Steinmetz <gscfq@t-online.de> ---
> (In reply to kargl from comment #4 and #5)
> > trunk can now compile this code.
> Confirming that ICE is gone for this group of sources.
>
> > ... as I think gfortran might be correct.
> Agreed, it's reasonable and necessary to reject character(*)
> and character(:) as type-spec in an array constructor.
>
> PR could be closed, thanks.
>
Thanks for confirmation. I'll likely convert
the codes to use dejagnu declarations and
commit them to the testsuite.
>From gcc-bugs-return-607024-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 18:23:07 2018
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Subject: [Bug c/86122] New: [8/9 Regression] ICE in useless_type_conversion_p, at gimple-expr.c:87
Date: Tue, 12 Jun 2018 18:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86122
Bug ID: 86122
Summary: [8/9 Regression] ICE in useless_type_conversion_p, at
gimple-expr.c:87
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gscfq@t-online.de
Target Milestone: ---
Changed between 20170618 and 20170716, at -O[gs123] :
$ cat z1.c
_Complex int f (_Complex int x)
{
x += __INT_MAX__;
x += 1;
return x;
}
$ cat z2.c
_Complex int f (_Complex int x)
{
x += 1;
x += __INT_MAX__;
return x;
}
$ gcc-7 -c z1.c -O2
$
$ gcc-9-20180610 -c z1.c -O2
during GIMPLE pass: ccp
z1.c: In function 'f':
z1.c:6:1: internal compiler error: Segmentation fault
}
^
0xa9cbbf crash_signal
../../gcc/toplev.c:324
0x8538d4 useless_type_conversion_p(tree_node*, tree_node*)
../../gcc/gimple-expr.c:87
0xda7f98 gimple_simplify_VIEW_CONVERT_EXPR
<...>/gcc/gimple-match.c:15232
0xd9d1b0 gimple_simplify
<...>/gcc/gimple-match.c:29642
0xd9f6de gimple_resimplify1(gimple**, gimple_match_op*, tree_node*
(*)(tree_node*))
../../gcc/gimple-match-head.c:101
0x5a6bd8 gimple_simplify_154
<...>/gcc/gimple-match.c:6971
0xe18869 gimple_simplify_PLUS_EXPR
<...>/gcc/gimple-match.c:31369
0xd90c3f gimple_simplify
<...>/gcc/gimple-match.c:80000
0xd92dd8 gimple_resimplify2(gimple**, gimple_match_op*, tree_node*
(*)(tree_node*))
../../gcc/gimple-match-head.c:155
0xe50041 gimple_simplify(gimple*, gimple_match_op*, gimple**, tree_node*
(*)(tree_node*), tree_node* (*)(tree_node*))
../../gcc/gimple-match-head.c:628
0x85a7e2 gimple_fold_stmt_to_constant_1(gimple*, tree_node* (*)(tree_node*),
tree_node* (*)(tree_node*))
../../gcc/gimple-fold.c:6097
0xb6eac5 ccp_fold
../../gcc/tree-ssa-ccp.c:1258
0xb6eac5 evaluate_stmt
../../gcc/tree-ssa-ccp.c:1785
0xb6faf5 visit_assignment
../../gcc/tree-ssa-ccp.c:2352
0xbe56e3 ssa_propagation_engine::simulate_stmt(gimple*)
../../gcc/tree-ssa-propagate.c:237
0xbe5a0a ssa_propagation_engine::simulate_block(basic_block_def*)
../../gcc/tree-ssa-propagate.c:371
0xbe66a9 ssa_propagation_engine::ssa_propagate()
../../gcc/tree-ssa-propagate.c:800
0xb66df7 do_ssa_ccp
../../gcc/tree-ssa-ccp.c:2471
0xb66df7 execute
../../gcc/tree-ssa-ccp.c:2515
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Subject: [Bug c/86123] New: [8/9 Regression] ICE in prepare_cmp_insn, at optabs.c:3967
Date: Tue, 12 Jun 2018 18:26:00 -0000
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Bug ID: 86123
Summary: [8/9 Regression] ICE in prepare_cmp_insn, at
optabs.c:3967
Product: gcc
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Introduced between 20170924 and 20171008, at -O[gs123] :
$ cat z1.c
_Bool f1(_Complex unsigned x, _Complex unsigned y)
{
_Complex unsigned t1 = x / y;
_Bool t2 = (t1 != 0);
return t2;
}
_Bool f2(_Complex unsigned x, _Complex unsigned y)
{
_Complex unsigned t1 = x / y;
_Bool t2 = (t1 == 0);
return t2;
}
$ gcc-8-20170924 -c z1.c -O2
$
$ gcc-9-20180610 -c z1.c -O2
during RTL pass: expand
z1.c: In function 'f1':
z1.c:5:10: internal compiler error: in prepare_cmp_insn, at optabs.c:3967
return t2;
^~
0x9b3ae3 prepare_cmp_insn
../../gcc/optabs.c:3967
0x9b3b65 emit_cmp_and_jump_insns(rtx_def*, rtx_def*, rtx_code, rtx_def*,
machine_mode, int, rtx_def*, profile_probability)
../../gcc/optabs.c:4113
0x76decb do_compare_rtx_and_jump(rtx_def*, rtx_def*, rtx_code, int,
machine_mode, rtx_def*, rtx_code_label*, rtx_code_label*, profile_probability)
../../gcc/dojump.c:1164
0x7e89a2 emit_store_flag_force(rtx_def*, rtx_code, rtx_def*, rtx_def*,
machine_mode, int, int)
../../gcc/expmed.c:6149
0x805c7f do_store_flag
../../gcc/expr.c:11582
0x805c7f expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../gcc/expr.c:9299
0x7f6ef4 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:9828
0x7052ce expand_expr
../../gcc/expr.h:279
0x7052ce expand_return
../../gcc/cfgexpand.c:3504
0x7052ce expand_gimple_stmt_1
../../gcc/cfgexpand.c:3607
0x7052ce expand_gimple_stmt
../../gcc/cfgexpand.c:3734
0x706243 expand_gimple_basic_block
../../gcc/cfgexpand.c:5762
0x70b5e6 execute
../../gcc/cfgexpand.c:6365
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/44491] Diagnostic just shows "<During initialization>" instead of a locus
Date: Tue, 12 Jun 2018 18:29:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.4
--- Comment #13 from kargl at gcc dot gnu.org ---
Fixed on trunk, 7-branch, and 8-branch.
Closing.
>From gcc-bugs-return-607029-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 18:29:22 2018
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Subject: [Bug c/86124] New: [9 Regression] ICE in create_variable_info_for, at tree-ssa-structalias.c:6123
Date: Tue, 12 Jun 2018 18:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86124
Bug ID: 86124
Summary: [9 Regression] ICE in create_variable_info_for, at
tree-ssa-structalias.c:6123
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
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Introduced between 20180527 and 20180603, at -O[gs123] :
$ cat z1.c
extern void a (void);
void b (void)
{
void *c;
c = a;
*(char *)c = 1;
}
$ gcc-9-20180527 -c z1.c -O2 -fopenacc
$ gcc-9-20180610 -c z1.c -O2
$
$ gcc-9-20180610 -c z1.c -O2 -fopenacc
during IPA pass: pta
z1.c:7:1: internal compiler error: Segmentation fault
}
^
0xa9cbbf crash_signal
../../gcc/toplev.c:324
0xc22f29 create_variable_info_for
../../gcc/tree-ssa-structalias.c:6123
0xc22f29 get_vi_for_tree
../../gcc/tree-ssa-structalias.c:2890
0xc232c7 get_constraint_for_ssa_var
../../gcc/tree-ssa-structalias.c:2971
0xc236fe get_constraint_for_1
../../gcc/tree-ssa-structalias.c:3559
0xc23d92 get_constraint_for_address_of
../../gcc/tree-ssa-structalias.c:3382
0xc2389b get_constraint_for_1
../../gcc/tree-ssa-structalias.c:3450
0xc24182 get_constraint_for_ptr_offset
../../gcc/tree-ssa-structalias.c:3106
0xc238c1 get_constraint_for_1
../../gcc/tree-ssa-structalias.c:3465
0xc24f3b find_func_aliases
../../gcc/tree-ssa-structalias.c:4896
0xc2d5a1 ipa_pta_execute
../../gcc/tree-ssa-structalias.c:8018
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Subject: [Bug fortran/44491] Diagnostic just shows "<During initialization>" instead of a locus
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44491
--- Comment #12 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Tue Jun 12 18:28:25 2018
New Revision: 261520
URL: https://gcc.gnu.org/viewcvs?rev=261520&root=gcc&view=rev
Log:
2018-06-12 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/44491
* expr.c (gfc_check_assign): Select non-NULL locus.
2018-06-12 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/44491
* gfortran.dg/pr44491.f90: New testcase
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr44491.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/expr.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/69968] RFC: Use Damerau-Levenshtein within spellcheck.c, rather than Levenshtein
Date: Tue, 12 Jun 2018 18:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69968
--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Tue Jun 12 18:28:37 2018
New Revision: 261521
URL: https://gcc.gnu.org/viewcvs?rev=261521&root=gcc&view=rev
Log:
spellcheck: support transpositions aka Damerau-Levenshtein (PR other/69968)
gcc/fortran/ChangeLog:
PR other/69968
* misc.c (gfc_closest_fuzzy_match): Update for renaming of
levenshtein_distance to get_edit_distance.
gcc/ChangeLog:
PR other/69968
* spellcheck-tree.c (levenshtein_distance): Rename to...
(get_edit_distance): ...this, and update for underlying renaming.
* spellcheck-tree.h (levenshtein_distance): Rename to...
(get_edit_distance): ...this.
* spellcheck.c (levenshtein_distance): Rename to...
(get_edit_distance): ...this. Convert from Levenshtein distance
to Damerau-Levenshtein distance by supporting transpositions of
adjacent characters. Rename "v1" to "v_next" and "v0" to
"v_one_ago".
(selftest::levenshtein_distance_unit_test_oneway): Rename to...
(selftest::test_edit_distance_unit_test_oneway): ...this, and
update for underlying renaming.
(selftest::levenshtein_distance_unit_test): Rename to...
(selftest::test_get_edit_distance_unit): ...this, and update for
underlying renaming.
(selftest::test_find_closest_string): Add example from PR 69968
where transposition helps
(selftest::test_metric_conditions): Update for renaming.
(selftest::test_metric_conditions): Likewise.
(selftest::spellcheck_c_tests): Likewise.
* spellcheck.h (levenshtein_distance): Rename both overloads to...
(get_edit_distance): ...this.
(best_match::consider): Update for renaming.
gcc/testsuite/ChangeLog:
PR other/69968
* gcc.dg/spellcheck-transposition.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/spellcheck-transposition.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/misc.c
trunk/gcc/spellcheck-tree.c
trunk/gcc/spellcheck-tree.h
trunk/gcc/spellcheck.c
trunk/gcc/spellcheck.h
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug other/69968] RFC: Use Damerau-Levenshtein within spellcheck.c, rather than Levenshtein
Date: Tue, 12 Jun 2018 18:31:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Implemented on trunk (for gcc 9) as r261521.
>From gcc-bugs-return-607032-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 18:31:27 2018
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78068
Bug 78068 depends on bug 69968, which changed state.
Bug 69968 Summary: RFC: Use Damerau-Levenshtein within spellcheck.c, rather than Levenshtein
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69968
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----------------------------------------------------------------------------
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>From gcc-bugs-return-607033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 18:36:44 2018
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From: "daniel.f.starke at freenet dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86048] [8/9 Regression] .seh_savexmm offset is negative error when compiling libpng
Date: Tue, 12 Jun 2018 18:36:00 -0000
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--- Comment #1 from Daniel Starke <daniel.f.starke at freenet dot de> ---
The error does not occur if I pass -fno-reorder-blocks-and-partition.
>From gcc-bugs-return-607034-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 18:46:44 2018
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Subject: [Bug c++/61806] [C++11] Expression sfinae w/o access gives hard error in partial template specializations
Date: Tue, 12 Jun 2018 18:46:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 8.2.
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Subject: [Bug c++/59002] [meta-bug] Access checking in templates
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Bug 59002 depends on bug 61806, which changed state.
Bug 61806 Summary: [C++11] Expression sfinae w/o access gives hard error in partial template specializations
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61806
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Subject: [Bug c++/85765] [8/9 Regression] Missing SFINAE in default template argument
Date: Tue, 12 Jun 2018 18:47:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 8.2.
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 8.2.
>From gcc-bugs-return-607038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 18:54:37 2018
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Subject: [Bug debug/86064] [8/9 Regression] compiling Linux kernel: Error: can't resolve `.text.unlikely' {.text.unlikely section} - `.LVL43x' {.text section}
Date: Tue, 12 Jun 2018 18:54:00 -0000
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Alexandre Oliva <aoliva at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Mine. Weird... the problem is caused by the following factors: (i) the
(indexed base,offset) loclist used for variable d crosses the hot/cold boundary
(we should never have a single range crossing that boundary); (ii) we use a
loclist because VTA is disabled (why? d is addressable, it's not a candidate
for VTA) and LVU is enabled (hmm, I guess this may be forcing a LLST so that
the range can get a view number); with VTA, or without LVU, we use a single
location expression that covers the entire function, as intended.
>From gcc-bugs-return-607039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 19:04:27 2018
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Subject: [Bug c/86125] New: missing -Wbuiltin-declaration-mismatch on a mismatched return type
Date: Tue, 12 Jun 2018 19:04:00 -0000
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Bug ID: 86125
Summary: missing -Wbuiltin-declaration-mismatch on a mismatched
return type
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
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Target Milestone: ---
GCC correctly diagnoses the strdup() declaration that differs from the
corresponding built-in in the type of its argument but fails to issue the same
warning for the declaration of strlen() that differs from the built-in in the
return type.
$ cat c.c && gcc -S -Wall c.c
char* strdup (int); // warning (good)
char* strlen (const char*); // missing warning
char* f (void)
{
return strlen ("123");
}
c.c:1:7: warning: conflicting types for built-in function ‘strdup’
[-Wbuiltin-declaration-mismatch]
char* strdup (int); // warning (good)
^~~~~~
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Subject: [Bug c/86125] missing -Wbuiltin-declaration-mismatch on a mismatched return type
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=83656,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=86114
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
See also pr83656 and pr86114.
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Subject: [Bug debug/86064] [8/9 Regression] compiling Linux kernel: Error: can't resolve `.text.unlikely' {.text.unlikely section} - `.LVL43x' {.text section}
Date: Tue, 12 Jun 2018 19:09:00 -0000
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--- Comment #9 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
In (i), that loclist format is used because of -gsplit-dwarf, I meant to say.
So we have 3 possible work-arounds immediately available: not using
-gsplit-dwarf, not disabling VTA, and disabling locviews.
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Subject: [Bug c++/85807] [8/9 Regression] ICEs related to noexcept
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 8.2.
>From gcc-bugs-return-607045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 19:53:52 2018
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Subject: [Bug c++/85815] [7/8/9 Regression] incorrect "invalid use of incomplete type" in a lambda on valid code
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Jun 12 19:53:10 2018
New Revision: 261524
URL: https://gcc.gnu.org/viewcvs?rev=261524&root=gcc&view=rev
Log:
PR c++/85815 - reference to member of enclosing template.
* parser.c (cp_parser_postfix_dot_deref_expression): Check
currently_open_class.
Added:
branches/gcc-7-branch/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-dependent1.C
Modified:
branches/gcc-7-branch/gcc/cp/ChangeLog
branches/gcc-7-branch/gcc/cp/parser.c
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Subject: [Bug c++/85815] [7/8/9 Regression] incorrect "invalid use of incomplete type" in a lambda on valid code
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 7.4/8.2.
>From gcc-bugs-return-607044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 19:53:39 2018
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Subject: [Bug c++/86060] [6/7/8/9 Regression] g++ ICE at on with "c++03" in tsubst_copy, at cp/pt.c:15459
Date: Tue, 12 Jun 2018 19:53:00 -0000
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--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Jun 12 19:53:02 2018
New Revision: 261523
URL: https://gcc.gnu.org/viewcvs?rev=261523&root=gcc&view=rev
Log:
PR c++/86060 - ICE on range for with -std=c++98.
* parser.c (cp_parser_init_statement): Don't clobber *decl after
pedwarn.
Added:
branches/gcc-7-branch/gcc/testsuite/g++.dg/cpp0x/range-for35.C
Modified:
branches/gcc-7-branch/gcc/cp/ChangeLog
branches/gcc-7-branch/gcc/cp/parser.c
branches/gcc-7-branch/gcc/testsuite/g++.dg/cpp0x/range-for9.C
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Subject: [Bug c++/86060] [6/7/8/9 Regression] g++ ICE at on with "c++03" in tsubst_copy, at cp/pt.c:15459
Date: Tue, 12 Jun 2018 19:54:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|6.5 |7.4
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 7.4/8.2.
>From gcc-bugs-return-607047-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 20:52:26 2018
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From: "gburca-gnu at ebixio dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86126] New: Note when linking libraries built with different -std options
Date: Tue, 12 Jun 2018 20:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86126
Bug ID: 86126
Summary: Note when linking libraries built with different -std
options
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gburca-gnu at ebixio dot com
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Created attachment 44265
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44265&action=edit
Bug demo
Linking together libraries that have been built with LTO and different -std
options causes g++ to issue notes of the form: type 'A' should match type 'A'.
Specifically, with code below, the output is:
..../gcc/8.1.0-1/include/c++/8.1.0/sstream:80:57: note: type ‘struct
__string_type’ should match type ‘struct __string_type’
typedef basic_string<char_type, _Traits, _Alloc> __string_type;
^
..../gcc/8.1.0-1/include/c++/8.1.0/sstream:540:57: note: type ‘struct
__stringbuf_type’ should match type ‘struct __stringbuf_type’
typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type;
^
I've tested with gcc 7.2.0 and it also issues a note about 'struct
__string_type'
Based on what I see at https://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html
and
https://stackoverflow.com/questions/46746878/is-it-safe-to-link-c17-c14-and-c11-objects/49119902#49119902
it should be possible to link together objects built with the same compiler but
different -std options.
The libraries are built with:
g++ -fPIC -c liba.cpp -std=gnu++14 -o a.o ${CFLAGS}
g++ -fPIC -c libb.cpp -std=gnu++17 -o b.o ${CFLAGS}
ar cru liba.a a.o
ar cru libb.a b.o
They are linked together with:
g++ main.cpp -std=gnu++17 -L. -la -lb -o main ${CFLAGS}
-Wl,-rpath,${CXX_PATH}/lib64
And:
CFLAGS := -flto -ffat-lto-objects
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Subject: [Bug debug/86064] [8/9 Regression] compiling Linux kernel: Error: can't resolve `.text.unlikely' {.text.unlikely section} - `.LVL43x' {.text section}
Date: Tue, 12 Jun 2018 21:17:00 -0000
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--- Comment #10 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Created attachment 44266
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44266&action=edit
candidate patch
Here's the patch I'm testing
>From gcc-bugs-return-607049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 21:31:03 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86114] [8/9 Regression] ICE in gimple_fold_builtin_strlen with an invalid call to strnlen
Date: Tue, 12 Jun 2018 21:31:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00718.html
>From gcc-bugs-return-607050-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 22:23:02 2018
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/86107] [9 Regression] ICE: in ix86_mitigate_rop, at config/i386/i386.c:42301 with -O -funroll-loops -mavx5124fmaps -mmitigate-rop --param=hot-bb-frequency-fraction=1
Date: Tue, 12 Jun 2018 22:23:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rsandifo at gcc dot gnu.org
--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #2)
> For some reason, this part of x86_mitigate_rop:
>
> int n_uses;
> reg_class superclass = regrename_find_superclass (head, &n_uses,
> &unavailable);
> old_reg = head->regno;
> best_reg = find_rename_reg (head, superclass, &unavailable,
> old_reg, false);
> bool ok = regrename_do_replace (head, best_reg);
> gcc_assert (ok);
> if (dump_file)
> fprintf (dump_file, "Chain %d renamed as %s in %s\n", head->id,
> reg_names[best_reg], reg_class_names[superclass]);
>
> does not validate in regrename_do_replace.
>
> The compiler wants to rename:
>
> (insn 1264 1263 1265 5 (set (reg:DI 22 xmm1 [594])
> (reg:DI 3 bx [594])) "pr86107.c":15 85 {*movdi_internal}
> (expr_list:REG_DEAD (reg:DI 3 bx [594])
> (nil)))
>
> to:
>
> (set (reg:DI 22 xmm1 [594])
> (reg:DI 1 dx [594]))
>
> and fails validation of new instruction.
>
> The alternative 20 in *movdi_internal (*v->?r) is marked with
> preferred_for_speed attribute:
>
> (set (attr "preferred_for_speed")
> (cond [(eq_attr "alternative" "10,17,19")
> (symbol_ref "TARGET_INTER_UNIT_MOVES_FROM_VEC")
> (eq_attr "alternative" "11,18,20")
> (symbol_ref "TARGET_INTER_UNIT_MOVES_TO_VEC")
> ]
> (symbol_ref "true")))
>
> but should not fail verification even for !TARGET_INTER_UNIT_MOVES_TO_VEC
> targets. As a matter of fact, the compilation works with -mtune=intel.
This is by design when the insn belongs to a block that is being
optimised for speed rather than size. It isn't recog per se that
fails, but the validate_change stuff, which is designed for doing
optional optimisations rather than required changes.
>From gcc-bugs-return-607051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 12 22:56:22 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86127] New: STL containers do not satisfy container.requirements.general clause 8
Date: Tue, 12 Jun 2018 22:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86127
Bug ID: 86127
Summary: STL containers do not satisfy
container.requirements.general clause 8
Product: gcc
Version: 7.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: fidget324 at gmail dot com
Target Milestone: ---
Clause 23.2.1.8 of n4140 states that for containers which obtain memory using
an allocator, "Move constructors obtain an allocator by move construction from
the allocator belonging to the container being copied." At least several STL
containers in libstdc++ do not satisfy this requirement, and in fact perform
several unnecessary copies. I recently reported a similar bug in libc++, which
has since been fixed: https://bugs.llvm.org/show_bug.cgi?id=37694
// test.cpp
#include <memory>
#include <forward_list>
#include <vector>
#include <map>
#include <iostream>
template <typename T>
class my_allocator {
std::allocator<T> __alloc;
public:
using value_type = T;
using propagate_on_container_move_assignment = std::true_type;
template <typename U> friend class my_allocator;
template <typename U>
struct rebind {
using other = my_allocator<U>;
};
my_allocator() = default;
template <typename U>
my_allocator(const my_allocator<U> &other) : __alloc(other.__alloc) {
std::cout << "template copy constructor\n";
}
my_allocator(const my_allocator &other) : __alloc(other.__alloc) {
std::cout << "copy constructor\n";
}
template <typename U>
my_allocator(my_allocator<U> &&other) noexcept : __alloc(other.__alloc) {
std::cout << "template move constructor\n";
}
my_allocator(my_allocator &&other) noexcept : __alloc(other.__alloc) {
std::cout << "move constructor\n";
}
value_type *allocate(std::size_t n) {
return __alloc.allocate(n);
}
void deallocate(value_type *p, std::size_t n) {
__alloc.deallocate(p, n);
}
};
int main() {
std::cout << "\nforward_list test\n==================\n";
std::forward_list<int, my_allocator<int>> l = {1, 2, 3, 4};
auto l1 = std::move(l);
std::cout << "\nmap test\n==================\n";
std::map<int, int, std::less<int>, my_allocator<std::pair<const int, int>>> m
= {{1, 2}, {3, 4}};
auto m1 = std::move(m);
std::cout << "\nvector test\n==================\n";
std::vector<int, my_allocator<int>> v = {1, 2, 3, 4};
auto v1 = std::move(v);
}
Compiling with libstdc++ 7.3.1:
$ clang++ -std=c++14 test.cpp
$ ./a.out
forward_list test
==================
template copy constructor
move constructor
template copy constructor
template copy constructor
template copy constructor
template copy constructor
move constructor
map test
==================
copy constructor
template copy constructor
move constructor
move constructor
vector test
==================
move constructor
template copy constructor
template copy constructor
template copy constructor
template copy constructor
The same test using the latest 'master' of libc++:
$ clang++ -stdlib=libc++ -std=c++14 test.cpp
$ ./a.out
forward_list test
==================
move constructor
map test
==================
move constructor
vector test
==================
move constructor
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86125] missing -Wbuiltin-declaration-mismatch on a mismatched return type
Date: Tue, 12 Jun 2018 23:18:00 -0000
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
It looks like this is on purpose. match_builtin_function_types, the function
that determines whether a declaration of a built-in matches its expected type,
has the following comment:
/* Subroutine of compare_decls. Allow harmless mismatches in return
and argument types provided that the type modes match. This function
returns a unified type given a suitable match, and 0 otherwise. */
and it uses TYPE_MODE (type) to decide whether return and argument types are
compatible. That makes size_t and char* match on targets where they are the
same size, and ditto for int and char*.
C++, on the other hand, handles this more sanely and diagnoses the mismatch in
both cases:
c.c:2:7: warning: declaration of ‘char* strdup(int)’ conflicts with built-in
declaration ‘char* strdup(const char*)’ [-Wbuiltin-declaration-mismatch]
char* strdup (int); // warning
^~~~~~
c.c:3:7: warning: declaration of ‘char* strlen(const char*)’ conflicts with
built-in declaration ‘long unsigned int strlen(const char*)’
[-Wbuiltin-declaration-mismatch]
char* strlen (const char*); // warning
^~~~~~
>From gcc-bugs-return-607053-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 00:04:50 2018
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Subject: [Bug c/86125] missing -Wbuiltin-declaration-mismatch on a mismatched return type
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-13
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Testing a patch.
>From gcc-bugs-return-607054-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 00:37:36 2018
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Subject: [Bug gcov-profile/83878] Line hit counts are sometimes wrong
Date: Wed, 13 Jun 2018 00:37:00 -0000
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--- Comment #2 from Marco Castelluccio <mcastelluccio at mozilla dot com> ---
Created attachment 44267
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44267&action=edit
Archive with GCNO, GCDA, source file and GCOV output
Sorry for replying late, but I just managed to find a reproducible small test
case.
g++ --coverage -fno-exceptions -O0 main.cpp
./a.out
gcov -u -b -c main.cpp
The relevant part is:
> function main called 1 returned 100% blocks executed 94%
> 1: 24:int main(void)
> -: 25:{
> 2: 26: Ciao ciao;
> call 0 returned 1
> call 1 returned 1
> unconditional 2 taken 1
> -: 27:
> 1: 28: ciao.setName("Marco");
Line 26 is clearly executed once, but gcov shows it as executed twice. The same
happens if you have an if block where you call a constructor.
>From gcc-bugs-return-607055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 01:52:46 2018
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Subject: [Bug middle-end/66240] RFE: extend -falign-xyz syntax
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #8 from Jeffrey A. Law <law at redhat dot com> ---
In response to c#2 and c#3, you're more likely to get that kind of "ideal"
solution by hacking the linker rather than the compiler or assembler. The
linker is in an ideal position to make these kinds of decisions.
You can even use the linker to fill in padding at the end of a function with a
nearby teeny-tiny function. You don't want to do that too aggressively though
because often functions in the same CU often call each other and you can easily
muck up locality if you move a teeny-tiny function too far from its parents or
children in the call graph/chain.
If you want to get really smart, you start collecting data about the call
graph, chains and frequencies, icache and itlb behavior and use that to drive
general code layout to improve icache/itlb behavior as well as smart alignments
of functions. Been there, done that :-)
>From gcc-bugs-return-607056-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 02:19:56 2018
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Subject: [Bug c++/86098] canonical types differ for identical types
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
Summary|[concepts] canonical types |canonical types differ for
|differ for identical types |identical types
--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
A reduced testcase that doesn't involve concepts:
template <class _Res> class future;
template <class T> T&& declval();
template<template <class...> class T>
struct construct_deduced {
template <class... AN>
using deduced_t = decltype(T{declval<AN>()...});
template<class... AN>
deduced_t<AN...> operator()(AN&&... an) const;
};
template<class T>
future<T> future_from(T singleSender);
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Subject: [Bug c++/86098] canonical types differ for identical types
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Jun 13 03:33:06 2018
New Revision: 261536
URL: https://gcc.gnu.org/viewcvs?rev=261536&root=gcc&view=rev
Log:
PR c++/86098 - ICE with template placeholder for TTP.
* typeck.c (structural_comptypes) [TEMPLATE_TYPE_PARM]: Check
CLASS_PLACEHOLDER_TEMPLATE.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/class-deduction58.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/typeck.c
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Subject: [Bug c++/86098] canonical types differ for identical types
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607059-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 04:47:43 2018
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Subject: [Bug target/86005] [RISCV] Invalid intermixing of __atomic_* libcalls and inline atomic instruction sequences
Date: Wed, 13 Jun 2018 04:47:00 -0000
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--- Comment #10 from James Y Knight <foom at fuhm dot net> ---
I suppose since it doesn't affect most common platforms, nobody's noticed the
brokenness yet?
ARM is probably the most common architecture which is missing atomics on common
CPU models, but when targeting common OSes (Linux, FreeBSD), you get to use the
kernel atomic cmpxchg helpers, so the issue doesn't arise there.
I haven't tested, but I don't think MIPS16 would be broken, since MIPS has
native atomics, just not in the MIPS16 ISA. So, it calls out-of-line libgcc
__sync_* routines, implemented in MIPS32 and which use LL/SC instructions.
There's no problem mixing those with native load/store instructions.
Anyways, for why mixing native load/store with __atomic_* functions is wrong,
consider,
int value = 4;
Thread1:
int oldval = __atomic_fetch_add(&value, 1, __ATOMIC_SEQ_CST);
Thread2:
__atomic_store_n(&value, 0, __ATOMIC_SEQ_CST);
The only allowable results after executing both threads should be:
oldval = 0, value = 1 -- if atomic_store executes first.
oldval = 4, value = 0 -- if atomic_fetch_add executes first.
But, if you implement __atomic_fetch_add with a lock, and implement
__atomic_store with a native store instruction, you may get the "impossible"
result,
oldval = 4, value = 5 -- if atomic_store executes *during* atomic_fetch_add,
between the load and store instructions. Oops.
>From gcc-bugs-return-607060-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 06:29:02 2018
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Subject: [Bug rtl-optimization/86107] [9 Regression] ICE: in ix86_mitigate_rop, at config/i386/i386.c:42301 with -O -funroll-loops -mavx5124fmaps -mmitigate-rop --param=hot-bb-frequency-fraction=1
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--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to rsandifo@gcc.gnu.org from comment #4)
> > but should not fail verification even for !TARGET_INTER_UNIT_MOVES_TO_VEC
> > targets. As a matter of fact, the compilation works with -mtune=intel.
>
> This is by design when the insn belongs to a block that is being
> optimised for speed rather than size. It isn't recog per se that
> fails, but the validate_change stuff, which is designed for doing
> optional optimisations rather than required changes.
Please note that regrename_do_replace fails, since the mentioned instruction
does not validate, although the compiler just wants to rename %bx to %dx in
(insn 1264); a simple register rename should not make the new insn invalid.
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Subject: [Bug tree-optimization/86076] [7/8/9 Regression] ICE: verify_gimple failed (error: location references block not in block tree)
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--- Comment #4 from paulhua at gcc dot gnu.org ---
Author: paulhua
Date: Wed Jun 13 06:50:12 2018
New Revision: 261538
URL: https://gcc.gnu.org/viewcvs?rev=261538&root=gcc&view=rev
Log:
2018-06-13 Chenghua Xu <paul.hua.gm@gmail.com>
PR target/86076
* config/mips/loongson.md (vec_setv4hi): Gen_lowpart for
operands[2] instead of operands[1].
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/mips/loongson.md
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Subject: [Bug target/86048] [8/9 Regression] .seh_savexmm offset is negative error when compiling libpng
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
I can reproduce.
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Subject: [Bug target/86048] [8/9 Regression] .seh_savexmm offset is negative error when compiling libpng
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Investigating.
>From gcc-bugs-return-607064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 06:58:46 2018
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Subject: [Bug middle-end/84184] gcc generates wrong relocations with negative offsets in struct arrays
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>From gcc-bugs-return-607065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 07:01:58 2018
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Subject: [Bug target/86067] [MIPS] ICE: scal-to-vec1.c:86:1: error: unrecognizable insn with -march=loongson3a
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Paul Hua <paul.hua.gm at gmail dot com> changed:
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--- Comment #3 from Paul Hua <paul.hua.gm at gmail dot com> ---
r261538 | paulhua | 2018-06-13 14:50:12 +0800 (Wed, 13 Jun 2018) | 6 lines
2018-06-13 Chenghua Xu <paul.hua.gm@gmail.com>
PR target/86076
* config/mips/loongson.md (vec_setv4hi): Gen_lowpart for
operands[2] instead of operands[1].
>From gcc-bugs-return-607066-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 07:33:17 2018
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Subject: [Bug c/86128] New: ice in get_string_length, at tree-ssa-strlen.c:653
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Bug ID: 86128
Summary: ice in get_string_length, at tree-ssa-strlen.c:653
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For the following reduced C code:
a;
*stpcpy(char *, char());
b() {
char c;
__builtin___strcpy_chk(c, a, 0);
strcat(c, b);
}
Somewhere between revision 261303 and 261388, it breaks with -O2.
[dcb@dhcppc0 dcbTest]$ ~/gcc/results.261303/bin/gcc -c -w -O2 bug444.c
[dcb@dhcppc0 dcbTest]$ ~/gcc/results.261388.ubsan/bin/gcc -c -w -O2 bug444.c
during GIMPLE pass: strlen
bug444.c: In function ‘b’:
bug444.c:3:1: internal compiler error: in get_string_length, at
tree-ssa-strlen.c:653
b() {
^
0x32e8707 get_string_length
../../trunk/gcc/tree-ssa-strlen.c:653
0x33044a2 handle_builtin_strcat
../../trunk/gcc/tree-ssa-strlen.c:2314
0x3309fe0 strlen_check_and_optimize_stmt
../../trunk/gcc/tree-ssa-strlen.c:3362
0x3309fe0 strlen_dom_walker::before_dom_children(basic_block_def*)
../../trunk/gcc/tree-ssa-strlen.c:3683
>From gcc-bugs-return-607067-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 08:32:17 2018
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Subject: [Bug c++/86130] New: Expect SIGBUS but program just silently exits
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Bug ID: 86130
Summary: Expect SIGBUS but program just silently exits
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Hi guys,
My first post here, hope I do things right.
The following code snippet just exits the program silently rather than
generating SIGBUS as you would expect it to. I don't think what doing that is
appropriate.
clang *does* generate SIGBUS, and although the code below is, strictly
speaking, UB, I don't think gcc should behave as it does, for obvious reasons.
OK, here's the code:
#include <iostream>
int main()
{
char *p = (char *) nullptr;
std::cout << "Watch the " << p << "birdie" << std::endl;
return 0;
}
And here's the output (note: no SIGBUS):
Watch the
Live demo here (where you can also try running it with clang)
https://wandbox.org/permlink/M1S74HqjT1HvLtr0
Sounds like an easy fix. Thanks.
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Subject: [Bug c++/86118] Gcc segfault for big c++ data compilation
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--- Comment #4 from ÐлекÑандр Кроль <oleksandr.krol at gmail dot com> ---
1. tar -x -M --file=idfs1.tar.gz ./idfs.ii.bz2
Prepare volume #2 for ‘idfs1.tar.gz’ and hit return: n idfs2.tar.gz
2. bunzip2 ./idfs.ii.bz2
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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: Wed, 13 Jun 2018 10:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85669
--- Comment #5 from Douglas Mencken <dougmencken at gmail dot com> ---
Bisecting is hard, because commits before
15adae8bbeb4579910eadf636e3b06f3dae4a342 “ PR bootstrap/82939
* line-map.c (linemap_init): Avoid broken value-init when compiling with GCC
4.2 â€
segfault on genmatch
echo timestamp > s-conditions
ccache /Developer/usr/bin/g++-4.2 -std=gnu++98 -c -g -mdynamic-no-pic
-DIN_GCC -fno-strict-aliasing -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wwrite-strings -Wcast-qual -Wno-format
-Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long
-Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H -DGENERATOR_FILE
-fno-PIE -I. -Ibuild -I../../gcc-git/gcc -I../../gcc-git/gcc/build
-I../../gcc-git/gcc/../include -I../../gcc-git/gcc/../libcpp/include \
-o build/gencondmd.o build/gencondmd.c
/bin/sh: line 1: 23267 Segmentation fault build/genmatch --gimple
../../gcc-git/gcc/match.pd > tmp-gimple-match.c
make[3]: *** [s-match] Error 139
make[3]: *** Waiting for unfinished jobs....
rm fsf-funding.pod gcov.pod gfdl.pod gpl.pod cpp.pod gcc.pod gcov-dump.pod
gcov-tool.pod
make[2]: *** [all-stage1-gcc] Error 2
make[1]: *** [stage1-bubble] Error 2
make: *** [all] Error 2
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From: "christophe.leroy@c-s.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86131] New: powerpc: gcc uses costly multiply instead of shift left
Date: Wed, 13 Jun 2018 10:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86131
Bug ID: 86131
Summary: powerpc: gcc uses costly multiply instead of shift
left
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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unsigned long f1(unsigned long a, unsigned long b)
{
return a >> ((4 - a) * 8);
}
unsigned long f2(unsigned long a, unsigned long b)
{
return a >> ((4 - a) << 3);
}
unsigned long g1(unsigned long a, unsigned long b)
{
return a >> (32 - a * 8);
}
unsigned long g2(unsigned long a, unsigned long b)
{
return a >> (32 - (a << 3));
}
when compiling with GCC 8.1 with -O2 -mcpu=860, the following result is
obtained:
00000000 <f1>:
0: 1d 23 ff f8 mulli r9,r3,-8
4: 39 29 00 20 addi r9,r9,32
8: 7c 63 4c 30 srw r3,r3,r9
c: 4e 80 00 20 blr
00000010 <f2>:
10: 21 23 00 04 subfic r9,r3,4
14: 55 29 18 38 rlwinm r9,r9,3,0,28
18: 7c 63 4c 30 srw r3,r3,r9
1c: 4e 80 00 20 blr
00000020 <g1>:
20: 1d 23 ff f8 mulli r9,r3,-8
24: 39 29 00 20 addi r9,r9,32
28: 7c 63 4c 30 srw r3,r3,r9
2c: 4e 80 00 20 blr
00000030 <g2>:
30: 54 69 18 38 rlwinm r9,r3,3,0,28
34: 21 29 00 20 subfic r9,r9,32
38: 7c 63 4c 30 srw r3,r3,r9
3c: 4e 80 00 20 blr
mulli requires 2 cycles, therefore it shouldn't be used, should it ?
The same code compiled with -mcpu=e300c2 gives:
00000000 <f1>:
0: 54 69 18 38 rlwinm r9,r3,3,0,28
4: 21 29 00 20 subfic r9,r9,32
8: 7c 63 4c 30 srw r3,r3,r9
c: 4e 80 00 20 blr
00000010 <f2>:
10: 21 23 00 04 subfic r9,r3,4
14: 55 29 18 38 rlwinm r9,r9,3,0,28
18: 7c 63 4c 30 srw r3,r3,r9
1c: 4e 80 00 20 blr
00000020 <g1>:
20: 54 69 18 38 rlwinm r9,r3,3,0,28
24: 21 29 00 20 subfic r9,r9,32
28: 7c 63 4c 30 srw r3,r3,r9
2c: 4e 80 00 20 blr
00000030 <g2>:
30: 54 69 18 38 rlwinm r9,r3,3,0,28
34: 21 29 00 20 subfic r9,r9,32
38: 7c 63 4c 30 srw r3,r3,r9
3c: 4e 80 00 20 blr
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Subject: [Bug middle-end/86132] New: Failure to elide condition known to be non-null
Date: Wed, 13 Jun 2018 11:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86132
Bug ID: 86132
Summary: Failure to elide condition known to be non-null
Product: gcc
Version: 8.0
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Created attachment 44268
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44268&action=edit
test case
x86_64 linux target using trunk:
trunk/obj/x86_64/gcc/cc1plus jay.ii -O3
Both single_slow() and single() implement a cache of an object that is
expensive to construct. We know if we call either once, subsequent calls will
return the same value -- can the compiler tell? (Ignore the problem of
operator new throwing, that's not important, alternatives that cannot thtor
show the same problem).
Yes and no. a() is optimized down to a single inlined call of single(). b()
is not so fortunate and contains two inlined calls of single().
single_slow() is annotated to return non-null. but its internals could well be
opaque. single() is inlineable, and expected to be so.
Thus the value propagator should be able to determine that the assignment to
single::object of the result of single_slow(), assigns a non-null value. It
manages to do this in the a() case, but not the b() case. My guess is it
thinks that the call to want_foo(Foo &) could affect the value of
single::object. But that's not possible. It's function-local, its address
does not escape, and it has a single assignment only reachable when it is NULL.
_Z1av:
cmpq $0, _ZZ6singlevE6object(%rip)
je .L15 ;; the only test
ret
.L15:
subq $8, %rsp
call _Z11single_slowv ; the one call
movq %rax, _ZZ6singlevE6object(%rip)
addq $8, %rsp
ret
_Z1bv:
subq $8, %rsp
movq _ZZ6singlevE6object(%rip), %rdi
testq %rdi, %rdi ;; test one.
je .L20
.L17:
call _Z8want_fooR3Foo
movq _ZZ6singlevE6object(%rip), %rdi
testq %rdi, %rdi ;; test two
je .L21
addq $8, %rsp
jmp _Z8want_fooR3Foo
.L20:
call _Z11single_slowv
movq %rax, %rdi
movq %rax, _ZZ6singlevE6object(%rip)
jmp .L17
.L21:
call _Z11single_slowv
movq %rax, _ZZ6singlevE6object(%rip)
movq %rax, %rdi
addq $8, %rsp
jmp _Z8want_fooR3Foo
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86048] [8/9 Regression] .seh_savexmm offset is negative error when compiling libpng
Date: Wed, 13 Jun 2018 11:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86048
--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Wed Jun 13 11:20:23 2018
New Revision: 261544
URL: https://gcc.gnu.org/viewcvs?rev=261544&root=gcc&view=rev
Log:
PR target/86048
* config/i386/winnt.c (i386_pe_seh_cold_init): Do not emit negative
offsets for register save directives. Emit a second batch of save
directives, if need be, when the function accesses prior frames.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr86048.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/winnt.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86048] [8/9 Regression] .seh_savexmm offset is negative error when compiling libpng
Date: Wed, 13 Jun 2018 11:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86048
--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Wed Jun 13 11:22:17 2018
New Revision: 261545
URL: https://gcc.gnu.org/viewcvs?rev=261545&root=gcc&view=rev
Log:
PR target/86048
* config/i386/winnt.c (i386_pe_seh_cold_init): Do not emit negative
offsets for register save directives. Emit a second batch of save
directives, if need be, when the function accesses prior frames.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr86048.c
- copied unchanged from r261544,
trunk/gcc/testsuite/gcc.target/i386/pr86048.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/i386/winnt.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86048] [8/9 Regression] .seh_savexmm offset is negative error when compiling libpng
Date: Wed, 13 Jun 2018 11:26:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
This will be fixed in the 8.2 release. Thanks for reporting the problem.
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Subject: [Bug target/86133] New: powerpc (-mcpu…48) internal compiler error for double variables
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Bug ID: 86133
Summary: powerpc (-mcpu=8548) internal compiler error for
double variables
Product: gcc
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86134] New: earlier error causes followup diagnostic about unknown -Wno-* options
Date: Wed, 13 Jun 2018 11:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86134
Bug ID: 86134
Summary: earlier error causes followup diagnostic about unknown
-Wno-* options
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
> echo 'int main(){' | gcc -S -x c -Wno-unknown-warning-option -
<stdin>: In function ‘main’:
<stdin>:1:1: error: expected declaration or statement at end of input
<stdin>: At top level:
cc1: warning: unrecognized command line option "-Wno-unknown-warning-option"
[enabled by default]
compared to
> echo 'int main(){}' | gcc -S -x c -Wno-unknown-warning-option -
with -Werror the diagnostic on the unrecognized command line option is an
error as well.
>From gcc-bugs-return-607077-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 11:33:19 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86134] earlier diagnostic causes followup diagnostic about unknown -Wno-* options
Date: Wed, 13 Jun 2018 11:33:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|earlier error causes |earlier diagnostic causes
|followup diagnostic about |followup diagnostic about
|unknown -Wno-* options |unknown -Wno-* options
Known to fail| |4.8.5, 8.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Also
> echo 'int main(){}' | gcc -S -x c -Wno-unknown-warning-option -Wall -Werror -Wno-error=return-type -
<stdin>: In function ‘main’:
<stdin>:1:1: warning: control reaches end of non-void function [-Wreturn-type]
<stdin>: At top level:
cc1: error: unrecognized command line option "-Wno-unknown-warning-option"
[-Werror]
cc1: all warnings being treated as errors
> echo $?
1
> echo 'int main(){}' | gcc -S -x c -Wno-unknown-warning-option -Wreturn-type -
<stdin>: In function ‘main’:
<stdin>:1:1: warning: control reaches end of non-void function [-Wreturn-type]
<stdin>: At top level:
cc1: warning: unrecognized command line option "-Wno-unknown-warning-option"
[enabled by default]
>From gcc-bugs-return-607078-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 11:39:30 2018
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From: "kiran0802 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86133] powerpc (-mcpu…48) internal compiler error for double variables
Date: Wed, 13 Jun 2018 11:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86133
--- Comment #1 from Kiran Alladi <kiran0802 at gmail dot com> ---
I am trying to compile the code with -mno-spe but still it seems that compiler
is generating spe instructions.
~/kiran$ cat test.c
double var_double = 0;
long var_long = 0;
void my_func( double var_val )
{
var_long = (long)(var_double);
}
~/kiran$ powerpc-eabi-gcc-6.4.0 -mcpu=8548 -G8 -msdata=eabi -mhard-float
-mno-spe -c test.c
test.c: In function ‘my_func’:
test.c:7:1: internal compiler error: output_operand: invalid %y value, try
using the 'Z' constraint
}
^
0x785f50 output_operand_lossage(char const*, ...)
../../gcc-6.4.0/gcc/final.c:3409
0x78628c output_operand(rtx_def*, int)
../../gcc-6.4.0/gcc/final.c:3843
0x786ddb output_asm_insn(char const*, rtx_def**)
../../gcc-6.4.0/gcc/final.c:3740
0x788344 final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
../../gcc-6.4.0/gcc/final.c:3015
0x788e41 final(rtx_insn*, _IO_FILE*, int)
../../gcc-6.4.0/gcc/final.c:2045
0x7892ed rest_of_handle_final
../../gcc-6.4.0/gcc/final.c:4441
0x7892ed execute
../../gcc-6.4.0/gcc/final.c:4516
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
~/kiran$ powerpc-eabi-gcc-6.4.0 -v
Using built-in specs.
COLLECT_GCC=powerpc-eabi-gcc-6.4.0
COLLECT_LTO_WRAPPER=/home/cross_compiler/powerpc-eabi/6.4.0/install/libexec/gcc/powerpc-eabi/6.4.0/lto-wrapper
Target: powerpc-eabi
Configured with: ../gcc-6.4.0/configure
--prefix=/home/powerpc-eabi/6.4.0/install --target=powerpc-eabi
--enable-languages=c,c++ --disable-multilib
Thread model: single
gcc version 6.4.0 (GCC)
----------------------------------------------------------------------------
Respective assembly(test.s):
.file "test.c"
.globl var_double
.section ".sbss","aw",@nobits
.align 3
var_double:
.zero 8
.size var_double, 8
.type var_double, @object
.globl var_long
.align 2
var_long:
.zero 4
.size var_long, 4
.type var_long, @object
.section ".text"
.align 2
.globl my_func
.type my_func, @function
my_func:
stwu 1,-24(1)
stw 31,20(1)
mr 31,1
evstdd 3,8(31)
evldd 9,
I had also tried with -G num size less than 8 and the compilation with through
without any errors. However, in this case compiler is generating spe
instruction even with -mno-spe option.
>From gcc-bugs-return-607079-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 12:31:36 2018
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Subject: [Bug libstdc++/86127] STL containers do not satisfy container.requirements.general clause 8
Date: Wed, 13 Jun 2018 12:31:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The allocator requirements say that move construction must be equivalent to
copy construction, and allocators should be cheap to copy anyway. I don't
consider this a bug.
>From gcc-bugs-return-607080-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 12:43:24 2018
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Subject: [Bug fortran/86120] SIGSEGV without backtrace when using submodules
Date: Wed, 13 Jun 2018 12:43:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-06-13
CC| |pault at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This PR seems to have been fixed around revision r257550.
>From gcc-bugs-return-607081-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 12:44:03 2018
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Subject: [Bug libstdc++/86127] STL containers do not satisfy container.requirements.general clause 8
Date: Wed, 13 Jun 2018 12:44:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Also your test is flawed.
(In reply to Scott Constable from comment #0)
> forward_list test
> ==================
These all come from the default constructor:
> template copy constructor
> move constructor
> template copy constructor
> template copy constructor
> template copy constructor
> template copy constructor
Only this comes from the move constructor:
> move constructor
> map test
> ==================
These all come from the default constructor:
> copy constructor
> template copy constructor
> move constructor
Only this comes from the move constructor:
> move constructor
>
> vector test
> ==================
Only this comes from the move constructor:
> move constructor
These all come from the destructors:
> template copy constructor
> template copy constructor
> template copy constructor
> template copy constructor
So the move constructors all perform exactly one move construction, as
required.
>From gcc-bugs-return-607082-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 12:46:49 2018
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Subject: [Bug fortran/86117] bogus warning maybe-uninitialized with class(*) and source argument in allocate
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 5.5.0 up to trunk (9.0).
I am pretty sure there is a duplicate somewhere.
>From gcc-bugs-return-607083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 12:49:44 2018
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Subject: [Bug libstdc++/86127] STL containers do not satisfy container.requirements.general clause 8
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #2)
> Also your test is flawed.
>
> (In reply to Scott Constable from comment #0)
> > forward_list test
> > ==================
>
> These all come from the default constructor:
Oops, I meant from the initializer-list constructor, not the default
constructor.
>From gcc-bugs-return-607084-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 12:49:46 2018
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Subject: [Bug fortran/86115] move_alloc for class(*) containing value of type character(len=*) looses data
Date: Wed, 13 Jun 2018 12:49:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-13
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.9.3 up to trunk (9.0) and I get an ICE with 4.8.5.
>From gcc-bugs-return-607085-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 12:55:20 2018
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Subject: [Bug fortran/86116] [6/7/8/9 Regression] Ambiguous generic interface not recognised
Date: Wed, 13 Jun 2018 12:55:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |4.8.5
Keywords| |accepts-invalid
Last reconfirmed| |2018-06-13
Ever confirmed|0 |1
Summary|Ambiguous generic interface |[6/7/8/9 Regression]
|not recognised |Ambiguous generic interface
| |not recognised
Target Milestone|--- |6.5
Known to fail| |4.9.3, 5.5.0, 6.4.0, 7.3.0,
| |8.1.0, 9.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.9.3 up to trunk (9.0), compiling the test with 4.8.5 gives
pr86116.f90:11.25:
module procedure s2
1
Error: Ambiguous interfaces 's2' and 's1' in generic interface 'sub' at (1)
>From gcc-bugs-return-607086-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 13:03:57 2018
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Subject: [Bug c++/86099] [9 Regression] internal compiler error: in cx_check_missing_mem_inits, at cp/constexpr.c:815
Date: Wed, 13 Jun 2018 13:03:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
template <int a> struct e { static constexpr int c = a; };
template <bool a> using d = e<a>;
template <bool, typename> struct aa;
template <typename...> struct j;
template <typename f, typename g> struct j<f, g> : aa<f::c, g>::h {};
template <typename i> struct n : d<i::c> {};
template <typename k, typename l = k> l m(int);
template <typename k> auto ab() -> decltype(m<k>(0));
template <typename...> struct p;
template <typename k, typename o> struct p<k, o> : e<noexcept(k(ab<o>()))> {};
template <typename> struct r;
class s;
template <typename, typename... q>
struct ac : j<d<__is_constructible(int)>, p<r<s>, q...>> {};
template <typename k> struct ae : ac<k, k> {};
template <bool, typename ad> struct aa { typedef ad h; };
template <typename k> struct w : j<n<ae<k>>, d<__is_constructible(int)>> {};
template <typename t> struct r {
t f;
int af;
r(r &&) = default;
};
template <typename k, typename = typename aa<w<k>::c, k>::h> void v(k *);
template <typename ag, typename ah, typename ai> ah aj(ag x, ah, ai) { v(x);
return 0; }
template <typename> struct y { typedef int ak; };
template <typename, typename = int> class z {
public:
template <typename...> void al();
};
template <typename k, typename am> template <typename...> void z<k, am>::al() {
r<s> *u;
typename y<am>::ak a = aj(u, a, int());
}
class s {
char *an = nullptr;
};
void ao() {
z<int> b;
b.al();
}
>From gcc-bugs-return-607087-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 13:09:14 2018
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Subject: [Bug libstdc++/86127] STL containers do not satisfy container.requirements.general clause 8
Date: Wed, 13 Jun 2018 13:09:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2018-06-13
Resolution|INVALID |---
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
We can avoid the "template copy constructor" lines with a trivial fix to
forward_list though, and then we get:
forward_list test
==================
template copy constructor
move constructor
move constructor
map test
==================
copy constructor
template copy constructor
move constructor
move constructor
vector test
==================
copy constructor
move constructor
All copies come from the initializer-list constructors.
>From gcc-bugs-return-607088-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 13:19:43 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86119] [8/9 Regression] Intrinsic len has wrong type if used within select type for a class(*) string
Date: Wed, 13 Jun 2018 13:19:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-13
CC| |jb at gcc dot gnu.org
Known to work| |6.4.0, 7.3.0
Target Milestone|--- |8.2
Summary|Intrinsic len has wrong |[8/9 Regression] Intrinsic
|type if used within select |len has wrong type if used
|type for a class(*) string |within select type for a
| |class(*) string
Ever confirmed|0 |1
Known to fail| |8.1.0, 9.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Likely revision r256284.
kind(len(s)) is 8 in this context, but
character(len=5) :: s
print *, kind(len(s))
end
gives 4.
>From gcc-bugs-return-607089-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 14:09:11 2018
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Subject: [Bug c++/86135] New: At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
Date: Wed, 13 Jun 2018 14:09:00 -0000
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Bug ID: 86135
Summary: At run time, when the constructor tries to construct
an objects element with a initializer-list (using
c++11 style) is giving segmentation fault. The old
style of initialize with parenthesis is working
properly.
Product: gcc
Version: 9.0
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Target Milestone: ---
Operating System Windows 8.
Compiler On internet wandbox.org gcc HEAD 9.0 2018O6
$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.67.0/gcc-head/include
-std=gnu++2a
Issue :
Initializing an element with angel brackets does not work. Paranthesis is
working.
struct TConcept {
virtual ~TConcept() = default;
virtual void ModelDraw(ostream& os) const = 0;
};
shared_ptr<const TConcept> Self;
template<typename T>
struct TModel final : TConcept {
TModel(T e) : Data { move(e) } { }
// It seems the issue is in this line, initiliazer list C++11 version does
not work
// TModel(T e) : Data ( move(e) ) { }
// C++98 style is working.
void ModelDraw(ostream& os) const {
Draw(os, Data);
}
T Data;
};
>From gcc-bugs-return-607090-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 14:17:25 2018
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Subject: [Bug c++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-06-13
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Can you please provide a working stand-alone testcase? Thanks.
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Subject: [Bug fortran/85702] [openacc] ICE in gfc_format_decoder, at fortran/error.c:943
Date: Wed, 13 Jun 2018 14:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85702
--- Comment #2 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Wed Jun 13 14:29:04 2018
New Revision: 261550
URL: https://gcc.gnu.org/viewcvs?rev=261550&root=gcc&view=rev
Log:
PR fortran/85702
gcc/fortran/
* openmp.c (gfc_match_oacc_wait): Use %C to report error location.
gcc/testsuite/
* gfortran.dg/goacc/pr85702.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/goacc/pr85702.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/openmp.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/85703] [openacc] ICE in resolve_fntype, at fortran/resolve.c:16313
Date: Wed, 13 Jun 2018 14:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85703
--- Comment #4 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Wed Jun 13 14:31:17 2018
New Revision: 261551
URL: https://gcc.gnu.org/viewcvs?rev=261551&root=gcc&view=rev
Log:
PR fortran/85703
gcc/fortran/
* parse.c (decode_oacc_directive): Set gfc_matching_function
to false.
(decode_omp_directive): Likewise.
gcc/testsuite/
* gfortran.dg/goacc/pr85703.f90: New test.
* gfortran.dg/gomp/pr85703.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/goacc/pr85703.f90
trunk/gcc/testsuite/gfortran.dg/gomp/pr85703.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/parse.c
trunk/gcc/testsuite/ChangeLog
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85577] list-initialization chooses initializer-list constructor
Date: Wed, 13 Jun 2018 14:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85577
Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |sabetaytoros at gmail dot com
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 86135 has been marked as a duplicate of this bug. ***
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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++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
Date: Wed, 13 Jun 2018 14:52:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |DUPLICATE
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is not a bug, GCC is correct. With list-initialization the compiler does
not always select a copy/move constructor even when the argument is the same
type as the object being constructed.
*** This bug has been marked as a duplicate of bug 85577 ***
>From gcc-bugs-return-607095-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 14:58:10 2018
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From: "mcccs at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86136] New: Modular multiplication optimization
Date: Wed, 13 Jun 2018 14:58:00 -0000
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Bug ID: 86136
Summary: Modular multiplication optimization
Product: gcc
Version: 9.0
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Optimization: Ofast
GCC can't see that
(a * n) % k = (a * (n % k)) % k
(even) when n is known at compile time.
As a result,
int k (int a) {
return (a * t) % 5;
}
always gives a different assembly for t = 1, 2, ...
you can also replace 5 with any number
Play with it here: https://godbolt.org/g/HkyHqg
Clang has this bug too.
>From gcc-bugs-return-607096-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 14:58:39 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++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
Date: Wed, 13 Jun 2018 14:58:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Based on the names I'm assuming your code is the same as a case I analysed
recently, which reduces to:
#include <vector>
#include <memory>
struct object_t {
template <class T>
object_t(T object)
: obj{std::make_shared<model_t<T>>(std::move(object))}
{ }
struct concept_t {
virtual ~concept_t() = default;
};
template <class T>
struct model_t : concept_t {
model_t(T value) : _data{std::move(value)} {}
T _data;
};
std::shared_ptr<const concept_t> obj;
};
int main() {
std::vector<object_t> d;
std::vector<object_t> d2;
d.push_back(d2);
}
This crashes with a stack overflow, due to Core DR 2137. GCC appears to be
implementing the standard correctly.
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Subject: [Bug fortran/85702] [openacc] ICE in gfc_format_decoder, at fortran/error.c:943
Date: Wed, 13 Jun 2018 15:02:00 -0000
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cesar at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #3 from cesar at gcc dot gnu.org ---
Fixed in trunk.
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/85703] [openacc] ICE in resolve_fntype, at fortran/resolve.c:16313
Date: Wed, 13 Jun 2018 15:02:00 -0000
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cesar at gcc dot gnu.org changed:
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--- Comment #5 from cesar at gcc dot gnu.org ---
Fixed in trunk.
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From: "mcccs at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86136] Modular multiplication optimization
Date: Wed, 13 Jun 2018 15:02:00 -0000
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--- Comment #1 from MCCCS <mcccs at gmx dot com> ---
Note: It can notice (a * n) % k = 0 if n is a multiple of k. The bug happens
only if n % k != 0.
>From gcc-bugs-return-607100-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:10:06 2018
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Subject: [Bug tree-optimization/86085] I/O built-ins considered argument clobbers
Date: Wed, 13 Jun 2018 15:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |alias, missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-13
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
Note that some conservatism is because of glibc allowing hooks into printf
formatting.
>From gcc-bugs-return-607101-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:12:08 2018
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Subject: [Bug sanitizer/86090] [ASAN] ASAN does not properly configure libbacktrace.
Date: Wed, 13 Jun 2018 15:12:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-607102-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:13:45 2018
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Subject: [Bug libstdc++/86130] Expect SIGBUS but program just silently exits
Date: Wed, 13 Jun 2018 15:13:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
Component|c++ |libstdc++
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The iostream inserters for char* require the pointer be non-null (and valid),
so their behavior is undefined otherwise. Libstdc++ detects the null pointer
and sets badbit in response which has the effect of discarding all subsequent
output sent to the stream.
If Clang/libc++ fails with a SEGV that's most likely because libc++ doesn't
have this feature.
FWIW, I don't think think detecting null pointers like this in the library is a
useful feature. They should be treated the same as any other invalid pointer:
i.e., let GCC decide what to do, which may be to issue a warning when it can
detect the pointer is null (and either let the code SEGV or drop the
dereference).
>From gcc-bugs-return-607103-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:15:49 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/86127] STL containers do not satisfy container.requirements.general clause 8
Date: Wed, 13 Jun 2018 15:15:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Jun 13 15:14:48 2018
New Revision: 261554
URL: https://gcc.gnu.org/viewcvs?rev=261554&root=gcc&view=rev
Log:
PR libstdc++/86127 avoid unnecessary allocator conversions
There is no need to use an allocator of the correct value_type when
calling allocator_traits::construct and allocator_traits::destroy. The
existing node allocator can be used, instead of constructing a new
allocator object every time.
There's also no benefit to using __gnu_cxx::__alloc_traits instead of
std::allocator_traits to get the pointer and const_pointer types.
std::forward_list is only available for C++11 and later, when
std::allocator_traits is available too.
PR libstdc++/86127
* include/bits/forward_list.h (_Fwd_list_base::_Tp_alloc_type): Remove
unused typedef.
(_Fwd_list_base::_Node_alloc_traits): Use allocator_traits instead of
__gnu_cxx::__alloc_traits.
(_Fwd_list_base::_M_create_node, _Fwd_list_base::_M_erase_after):
Use node allocator to create and destroy elements.
(forward_list::_Tp_alloc_type): Remove unused typedef.
(forward_list::_Alloc_traits): Use allocator_traits instead of
__gnu_cxx::__alloc_traits.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/forward_list.h
trunk/libstdc++-v3/include/bits/forward_list.tcc
>From gcc-bugs-return-607104-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:18:18 2018
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Subject: [Bug c++/86091] [fold expression] Slow compile time and high memory usage compared to initializer_list folds
Date: Wed, 13 Jun 2018 15:18:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I can't reproduce the slowness.
> /usr/bin/time g++-8 t.C -std=gnu++1z -Wall -Wextra
0.23user 0.04system 0:00.27elapsed 99%CPU (0avgtext+0avgdata 44028maxresident)k
0inputs+1568outputs (0major+14354minor)pagefaults 0swaps
> /usr/bin/time g++-8 t.C -std=gnu++1z -Wall -Wextra -DBUG
0.18user 0.03system 0:00.22elapsed 100%CPU (0avgtext+0avgdata
30476maxresident)k
0inputs+1408outputs (0major+10204minor)pagefaults 0swaps
>From gcc-bugs-return-607105-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:19:55 2018
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Subject: [Bug c/86092] global constant pointer optimization
Date: Wed, 13 Jun 2018 15:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
kern_buff_p could be allocated to .rodata as well and thus a write traps.
>From gcc-bugs-return-607106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:20:51 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86093] [8/9 Regression] volatile ignored on pointer in C
Date: Wed, 13 Jun 2018 15:20:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Target Milestone|--- |8.2
>From gcc-bugs-return-607107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:22:36 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
Date: Wed, 13 Jun 2018 15:22:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed?
>From gcc-bugs-return-607108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:23:14 2018
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note if there's any ABI change between 8.1 and 8.2 please adjust changes.html
to note this as a caveat (even if the 7.3 -> 8.1 change was unintended).
>From gcc-bugs-return-607109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:25:03 2018
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Subject: [Bug tree-optimization/86128] ice in get_string_length, at tree-ssa-strlen.c:653
Date: Wed, 13 Jun 2018 15:25:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Component|c |tree-optimization
Resolution|--- |DUPLICATE
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The test case is corrupted but I'm pretty sure the ICE has been fixed and this
report is a duplicate of bug 86089. Please reopen if it persists (and include
a valid test case).
*** This bug has been marked as a duplicate of bug 86089 ***
>From gcc-bugs-return-607111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:25:42 2018
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Subject: [Bug tree-optimization/86097] [8/9 Regression] ICE: verify_gimple failed (error: mismatching comparison operand types)
Date: Wed, 13 Jun 2018 15:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
CC| |rguenth at gcc dot gnu.org
>From gcc-bugs-return-607110-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:25:04 2018
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Subject: [Bug tree-optimization/86089] [9 Regression] ICE in get_string_length, at tree-ssa-strlen.c:653
Date: Wed, 13 Jun 2018 15:25:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #15 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 86128 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:27:37 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/86104] gcc ICE at -O1 on x86_64-linux-gnu in "plus_constant", at explow.c:103
Date: Wed, 13 Jun 2018 15:27:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yeah, I think ICE-on-invalid RTL input isn't something we want to track...
We might want to track it for the purpose of a not implemented RTL IL
verifier.
>From gcc-bugs-return-607113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:35:12 2018
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Subject: [Bug rtl-optimization/86108] [8/9 Regression] crash during unwinding with -O2
Date: Wed, 13 Jun 2018 15:35:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |7.3.0
Keywords| |EH, needs-bisection,
| |wrong-code
Last reconfirmed| |2018-06-13
Component|c++ |rtl-optimization
CC| |hubicka at gcc dot gnu.org
Ever confirmed|0 |1
Summary|crash during unwinding with |[8/9 Regression] crash
|-O2 |during unwinding with -O2
Target Milestone|--- |8.2
Known to fail| |8.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Note it works for 7.3 with -freorder-blocks-and-partition
>From gcc-bugs-return-607114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:35:26 2018
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Subject: [Bug gcov-profile/86109] [8/9 Regression] gcov reports lines in lambdas as not executable
Date: Wed, 13 Jun 2018 15:35:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-607115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:36:43 2018
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From: "sabetaytoros at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
Date: Wed, 13 Jun 2018 15:36:00 -0000
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--- Comment #4 from Sabetay Toros <sabetaytoros at gmail dot com> ---
*​" --- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org
<http://gnu.org/>> ---This is not a bug, GCC is correct. With
list-initialization the compiler doesnot always select a copy/move
constructor even when the argument is the sametype as the object being
constructed. ​"*
If it is not a bug then why the parenthesis version is working.
Moreover Strastroup advice is to use the initializer list version in
constructing objects not the parenthesis.
Besides Clang does not suffer with that kind of error. Both styles are
working.
Sabetay
On Wed, Jun 13, 2018 at 5:52 PM, redi at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86135
>
> Jonathan Wakely <redi at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ------------------------------------------------------------
> ----------------
> Status|WAITING |RESOLVED
> Resolution|--- |DUPLICATE
>
> --- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> This is not a bug, GCC is correct. With list-initialization the compiler
> does
> not always select a copy/move constructor even when the argument is the
> same
> type as the object being constructed.
>
> *** This bug has been marked as a duplicate of bug 85577 ***
>
> --
> You are receiving this mail because:
> You reported the bug.
>
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From: "p.sanders at alpinesoft dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
Date: Wed, 13 Jun 2018 15:38:00 -0000
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--- Comment #2 from Paul Sanders <p.sanders at alpinesoft dot co.uk> ---
Hi Martin,
Thanks very much for your prompt reply, and I completely agree with your
viewpoint.
I therefore hereby request that libstc++ stops behaving like that and just lets
the SIGSEGV happen. The current behaviour is very unfriendly.
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Subject: [Bug tree-optimization/86114] [8/9 Regression] ICE in gimple_fold_builtin_strlen with an invalid call to strnlen
Date: Wed, 13 Jun 2018 15:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86114
Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-607117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:41:16 2018
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Subject: [Bug middle-end/86113] __builtin_nan has "const" attribute
Date: Wed, 13 Jun 2018 15:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86113
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-13
Component|c |middle-end
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hum, confirmed. I guess they need to be either PURE or ".R".
>From gcc-bugs-return-607119-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:49:57 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 middle-end/86121] [9 Regression] missing -Wstringop-overflow on strcpy followed by strcat
Date: Wed, 13 Jun 2018 15:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86121
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-13
CC| |rguenth at gcc dot gnu.org
Version|8.0 |9.0
Target Milestone|--- |9.0
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. The change was desired and the outcome is desired as well. The
warning code needs to deal with this. We only optimize this after the
strlen pass which runs pretty late and transforms the two calls to memcpy_chk
calls (w/o folding them it seems so it takes until VRP/forwprop to finally
fold them).
There's a missed optimization opportunity in merging the two aggregate copies.
>From gcc-bugs-return-607120-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:53:06 2018
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Subject: [Bug middle-end/86122] [8/9 Regression] ICE in useless_type_conversion_p, at gimple-expr.c:87
Date: Wed, 13 Jun 2018 15:53:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-13
CC| |glisse at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Component|c |middle-end
Target Milestone|--- |8.2
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
/* (A +- CST1) +- CST2 -> A + CST3
Use view_convert because it is safe for vectors and equivalent for
scalars. */
(for outer_op (plus minus)
...
/* Last resort, use some unsigned type. */
(with { tree utype = unsigned_type_for (type); }
(view_convert (inner_op
(view_convert:utype @0)
(view_convert:utype
{ drop_tree_overflow (cst); })))))))))))))
but utype is NULL_TREE here. type is <complex_type 0x7ffff68b4e70 complex int>
signed_or_unsigned_type_for doesn't handle COMPLEX_TYPE.
>From gcc-bugs-return-607121-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:54:28 2018
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Subject: [Bug middle-end/86123] [8/9 Regression] ICE in prepare_cmp_insn, at optabs.c:3967
Date: Wed, 13 Jun 2018 15:54:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |7.3.1
Keywords| |ice-on-valid-code,
| |needs-bisection
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-607123-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:55:51 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 ipa/86124] [9 Regression] ICE in create_variable_info_for, at tree-ssa-structalias.c:6123
Date: Wed, 13 Jun 2018 15:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |ASSIGNED
Keywords| |ice-on-valid-code
Last reconfirmed| |2018-06-13
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CC| |marxin at gcc dot gnu.org
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with -O -fipa-pta. Mine.
>From gcc-bugs-return-607122-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:55:08 2018
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From: "guez at lmd dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82207] ieee_class identifies signaling NaNs as quiet NaNs
Date: Wed, 13 Jun 2018 15:55:00 -0000
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--- Comment #11 from Lionel GUEZ <guez at lmd dot ens.fr> ---
And what about my suggestion that ieee_support_nan(0.) should return false for
the time being?
>From gcc-bugs-return-607124-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 15:58:39 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 c++/86129] New: Expect SIGBUS but program just silently exits
Date: Wed, 13 Jun 2018 15:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86129
Bug ID: 86129
Summary: Expect SIGBUS but program just silently exits
Product: gcc
Version: 8.1.0
Status: RESOLVED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: p.sanders at alpinesoft dot co.uk
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Hi guys,
My first post here, hope I do things right.
The following code snippet just exits the program silently rather than
generating SIGBUS as you would expect it to. I don't think what doing that is
appropriate.
clang *does* generate SIGBUS, and although the code below is, strictly
speaking, UB, I don't think gcc should behave as it does, for obvious reasons.
OK, here's the code:
#include <iostream>
int main()
{
char *p = (char *) nullptr;
std::cout << "Watch the " << p << "birdie" << std::endl;
return 0;
}
And here's the output (note: no SIGBUS):
Watch the
Live demo here (where you can also try running it with clang)
https://wandbox.org/permlink/M1S74HqjT1HvLtr0
Sounds like an easy fix. Thanks.
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Probably some nonnull attribute somewhere. Anyway, GIGO.
>From gcc-bugs-return-607125-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 16:02:16 2018
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Subject: [Bug libstdc++/86127] STL containers do not satisfy container.requirements.general clause 8
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86127
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
Severity|normal |enhancement
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I've removed the converting copies from forward_list.
>From gcc-bugs-return-607126-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 16:04:19 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++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
Date: Wed, 13 Jun 2018 16:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86135
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Sabetay Toros from comment #4)
> If it is not a bug then why the parenthesis version is working.
Because the rules for direct-initialization (with parentheses) and
list-initialization (with braces) are different. Different rules means
different things happen.
> Moreover Strastroup advice is to use the initializer list version in
> constructing objects not the parenthesis.
That's not always good advice.
> Besides Clang does not suffer with that kind of error. Both styles are
> working.
Clang does not follow the standard correctly in this respect.
>From gcc-bugs-return-607127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 16:08:28 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
Date: Wed, 13 Jun 2018 16:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86130
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Arguably crashing the program is more unfriendly.
We could add the nonnull attribute to the relevant ostream members, or add
assertions that can be optionally enabled, but I'm not convinced that crashing
is necessarily an improvement.
>From gcc-bugs-return-607128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 16:52:05 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86048] [8/9 Regression] .seh_savexmm offset is negative error when compiling libpng
Date: Wed, 13 Jun 2018 16:52:00 -0000
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--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
To give a bit more information about the bug: it's a bad interaction between
SEH, -freorder-blocks-and-partition (default) and
__builtin_{frame,return}_address.
>From gcc-bugs-return-607129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 16:57:04 2018
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/86107] [9 Regression] ICE: in ix86_mitigate_rop, at config/i386/i386.c:42301 with -O -funroll-loops -mavx5124fmaps -mmitigate-rop --param=hot-bb-frequency-fraction=1
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--- Comment #6 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #5)
> (In reply to rsandifo@gcc.gnu.org from comment #4)
>
> > > but should not fail verification even for !TARGET_INTER_UNIT_MOVES_TO_VEC
> > > targets. As a matter of fact, the compilation works with -mtune=intel.
> >
> > This is by design when the insn belongs to a block that is being
> > optimised for speed rather than size. It isn't recog per se that
> > fails, but the validate_change stuff, which is designed for doing
> > optional optimisations rather than required changes.
>
> Please note that regrename_do_replace fails, since the mentioned instruction
> does not validate, although the compiler just wants to rename %bx to %dx in
> (insn 1264); a simple register rename should not make the new insn invalid.
Yeah, but "validate" in the "validate_change" sense rather than
"recog_memoized" sense. Like I say, that's by design: regrename
shouldn't be changing a "preferred for speed" alternative into
a "not preferred for speed" alternative if the block is being
optimised for speed. The renaming is a pure optimisation when
regrename does it, so returning false is the right thing to do.
>From gcc-bugs-return-607130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 17:17:20 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
Date: Wed, 13 Jun 2018 17:17:00 -0000
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--- Comment #6 from Sabetay Toros <sabetaytoros at gmail dot com> ---
Hi,
*Because the rules for direct-initialization (with parentheses)
andlist-initialization (with braces) are different. Different rules
meansdifferent things happen. *
the rules may be different but results must be the same.
There is a flaw here. If gcc is right in *list-initialization * then direct
initialization is wrong and should give the same result, the segmentation
fault. But it is not giving an error and it is working as expected.
If Clang is running both version without an error, sorry you can not
defend this.
It cant be a biased result for achieving the initialization of a member.
On Wed, Jun 13, 2018 at 7:04 PM, redi at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86135
>
> --- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> (In reply to Sabetay Toros from comment #4)
> > If it is not a bug then why the parenthesis version is working.
>
> Because the rules for direct-initialization (with parentheses) and
> list-initialization (with braces) are different. Different rules means
> different things happen.
>
> > Moreover Strastroup advice is to use the initializer list version in
> > constructing objects not the parenthesis.
>
> That's not always good advice.
>
> > Besides Clang does not suffer with that kind of error. Both styles are
> > working.
>
> Clang does not follow the standard correctly in this respect.
>
> --
> You are receiving this mail because:
> You reported the bug.
>
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Subject: [Bug libstdc++/86127] STL containers do not satisfy container.requirements.general clause 8
Date: Wed, 13 Jun 2018 17:36:00 -0000
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--- Comment #7 from Scott Constable <fidget324 at gmail dot com> ---
(In reply to Jonathan Wakely from comment #1)
> The allocator requirements say that move construction must be equivalent to
> copy construction, and allocators should be cheap to copy anyway. I don't
> consider this a bug.
To be nitpicky, it looks like this equivalence requirement was introduced
recently in the C++20 draft. I'm compiling using C++14.
I agree that allocators should be cheap to copy, but as a general principle I
think that all objects should be copied only when necessary. This is the
behavior I have observed in STL containers in libc++, as shown in my example
above. It just makes sense to me that when an STL container is moved, its
allocator should be moved, and no copying should be performed.
>From gcc-bugs-return-607132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 17:45:52 2018
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Subject: [Bug c++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Sabetay Toros from comment #6)
> the rules may be different but results must be the same.
No, that's not true. The point of the different rules is to do different
things.
> There is a flaw here. If gcc is right in *list-initialization * then direct
> initialization is wrong and should give the same result,
No.
>From gcc-bugs-return-607133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 17:49:57 2018
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Subject: [Bug libstdc++/86127] STL containers do not satisfy container.requirements.general clause 8
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Scott Constable from comment #7)
> (In reply to Jonathan Wakely from comment #1)
> > The allocator requirements say that move construction must be equivalent to
> > copy construction, and allocators should be cheap to copy anyway. I don't
> > consider this a bug.
>
> To be nitpicky, it looks like this equivalence requirement was introduced
> recently in the C++20 draft. I'm compiling using C++14.
It's a defect report, so applies to previous standards.
https://wg21.link/lwg2593
Applying that change selectively would be madness.
> I agree that allocators should be cheap to copy, but as a general principle
> I think that all objects should be copied only when necessary. This is the
> behavior I have observed in STL containers in libc++, as shown in my example
> above. It just makes sense to me that when an STL container is moved, its
> allocator should be moved, and no copying should be performed.
And that's exactly what libstdc++ does. Your test fails to distinguish between
copies/moves performed during move construction and other operations.
>From gcc-bugs-return-607134-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 17:53:26 2018
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Subject: [Bug c++/86129] Expect SIGBUS but program just silently exits
Date: Wed, 13 Jun 2018 17:53:00 -0000
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--- Comment #2 from Paul Sanders <p.sanders at alpinesoft dot co.uk> ---
The program should crash. That way, the developer (or the test department)
gets to find out about the problem before the customer.
I would have thought this was obvious.
>From gcc-bugs-return-607135-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 17:55:30 2018
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
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--- Comment #4 from Paul Sanders <p.sanders at alpinesoft dot co.uk> ---
@Johnathon Crashing the program is the right thing to do, because it means that
the developer (or the test department) will get to find out about the problem
before the customer does.
Does that help you see why I am pushing for it?
>From gcc-bugs-return-607136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 18:01:03 2018
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Subject: [Bug c++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
Date: Wed, 13 Jun 2018 18:01:00 -0000
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
http://en.cppreference.com/w/cpp/language/list_initialization#Notes shows a
similar example, demonstrating the different behaviour for initializer_list
constructors. std::vector has an initializer-list constructor, so trying to
move-construct a vector<object_t> when object_t can be constructed from
std::vector<object_t> will result in infinite recursion.
This special case only applies to list-initialization, because it's related to
constructors taking a std::initializer_list. It's totally wrong to say that
list-init and direct-init must do the same thing in the presence of
initializer-list constructors. If they did the same thing there would have been
no need to introduce list-initialization syntax in the first place.
>From gcc-bugs-return-607137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 18:02:11 2018
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Subject: [Bug c++/86129] Expect SIGBUS but program just silently exits
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|INVALID |DUPLICATE
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You've created two copies of this bug report, it doesn't help to continue two
discussions in separate places.
*** This bug has been marked as a duplicate of bug 86130 ***
>From gcc-bugs-return-607138-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 18:02:11 2018
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 86129 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 18:03:08 2018
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82207] ieee_class identifies signaling NaNs as quiet NaNs
Date: Wed, 13 Jun 2018 18:03:00 -0000
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--- Comment #12 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Wed, Jun 13, 2018 at 03:55:02PM +0000, guez at lmd dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82207
>
> --- Comment #11 from Lionel GUEZ <guez at lmd dot ens.fr> ---
> And what about my suggestion that ieee_support_nan(0.) should return false for
> the time being?
>
AFAIK, the original implementation for the IEEE support followed
either the the F95 Floating-Point Exceptions Tecnical Report (ISO/EIC
TR 15580:2001) or F2003. These refer to IEC 60599 (1989-01), aka
IEEE 754-1985. Someone needs to review the entirety of the IEEE
support with respect to the upcoming F2018 standard. F2018 refers
to ISO/IEC/IEEE 60559:2011. I know that 60599:2011 is a significant
revision to 60599 (1989-01). Unfortunately, there are not enough
"someone"s to go around to fix gfortran.
Given a very quick glance at F2003, I think that it may not
be a good idea for ieee_support_nan(0.) to return .false.
as this then means IEEE_IS_NAN(X) cannot be used to determine
if X is a NaN.
>From gcc-bugs-return-607141-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 18:11:20 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86129] Expect SIGBUS but program just silently exits
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--- Comment #4 from Paul Sanders <p.sanders at alpinesoft dot co.uk> ---
Sorry, that didn't happen on purpose. I edited the title, maybe that's what
caused it, or maybe it's because someone (Martin?) changed the component from
gcc to libstdc++.
Anyway, I won't post anything further here (I probably shouldn't have posted
that last one, but saying 'GIGO' is not a valid reason for ignoring this
issue).
>From gcc-bugs-return-607140-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 18:11:01 2018
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Subject: [Bug libstdc++/86127] STL containers do not satisfy container.requirements.general clause 8
Date: Wed, 13 Jun 2018 18:11:00 -0000
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--- Comment #9 from Scott Constable <fidget324 at gmail dot com> ---
(In reply to Jonathan Wakely from comment #8)
> (In reply to Scott Constable from comment #7)
> > (In reply to Jonathan Wakely from comment #1)
> > > The allocator requirements say that move construction must be equivalent to
> > > copy construction, and allocators should be cheap to copy anyway. I don't
> > > consider this a bug.
> >
> > To be nitpicky, it looks like this equivalence requirement was introduced
> > recently in the C++20 draft. I'm compiling using C++14.
>
> It's a defect report, so applies to previous standards.
>
> https://wg21.link/lwg2593
>
> Applying that change selectively would be madness.
Ah, I wasn't aware this was a defect correction. I should have figured that out
myself.
>
> > I agree that allocators should be cheap to copy, but as a general principle
> > I think that all objects should be copied only when necessary. This is the
> > behavior I have observed in STL containers in libc++, as shown in my example
> > above. It just makes sense to me that when an STL container is moved, its
> > allocator should be moved, and no copying should be performed.
>
> And that's exactly what libstdc++ does. Your test fails to distinguish
> between copies/moves performed during move construction and other operations.
I misstated my argument here. The STL container move invokes one move from the
allocator, and this is correct. What I don't understand is why the other
copies, e.g. from the container default constructor and destructor, are
necessary. Particularly when libc++ does not exhibit this behavior.
>From gcc-bugs-return-607142-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 18:35:30 2018
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
Date: Wed, 13 Jun 2018 18:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86130
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And they don't test for iostream operations failing?
The program has undefined behaviour, i.e. a bug. Whether it's better to
identify that and treat it as a corrupt stream state (setting badbit, and
optionally throwing an exception) or crash the program depends on the program.
There's no single choice that's correct for all programs.
>From gcc-bugs-return-607143-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 18:46:32 2018
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Subject: [Bug libstdc++/86127] STL containers do not satisfy container.requirements.general clause 8
Date: Wed, 13 Jun 2018 18:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86127
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
As I said in comment 6, I've already removed the copies that forward_list does
on destruction.
As I said in comment 3, there are no copies in the default constructor, they're
in the initializer-list constructors. The standard says the initializer-list
constructors look like:
vector(initializer_list<T>, const Allocator& = Allocator());
That default argument needs to get copied into the vector's allocator member
somehow.
It could be avoided by defining:
vector(initializer_list<T>);
vector(initializer_list<T>, const Allocator&);
But doing so just to avoid making copies of a cheap-to-copy object is not a
good justification, and would make it impossible to explicitly instantiate the
container with a non-default constructible allocator type.
Node-based containers such as forward_list and map neede to convert the
allocator from the value_type to the node type. That can either happen once on
construction, or every time elements are inserted or erased. Doing it on
construction is the obvious choice, and that's where you see the "template copy
constructor" lines for forward_list and map.
The standard allows those copies, and they should be cheap. There is no bug
here.
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
Date: Wed, 13 Jun 2018 18:54:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I don't know the original reason for handling null pointers here, but it's
consistent with glibc's printf which prints "(null)" when a null pointer is
provided for a %s specifier.
Removing this longstanding behaviour now could break an unnknown number of
programs which are (impicitly or explicitly) relying on this behaviour of
libstdc++.
It's not at all clear to me that crashing is preferable.
>From gcc-bugs-return-607145-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 19:01:20 2018
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Subject: [Bug tree-optimization/86085] I/O built-ins considered argument clobbers
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
To make use of the Glibc printf hooks users have to disable the GCC built-ins.
Otherwise the hooks might interfere with the sprintf optimization.
>From gcc-bugs-return-607146-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 19:10:03 2018
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Subject: [Bug c/86137] New: ubsan runtime error in c-format.c
Date: Wed, 13 Jun 2018 19:10:00 -0000
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Bug ID: 86137
Summary: ubsan runtime error in c-format.c
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For this C code, derived from
gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-18.c
a() { __builtin_sprintf(a, "%9223372036854775808i"); }
and a recent ubsan version of gcc trunk, I get
$ ~/gcc/results.261388.ubsan/bin/gcc -Wall -c bug445.c
../../trunk/gcc/c-family/c-format.c:1252:20: runtime error: signed integer
overflow: 922337203 * 10 cannot be represented in type 'int'
Source code is
nargnum = 10 * argnum + (*fcp - '0');
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
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--- Comment #8 from Paul Sanders <p.sanders at alpinesoft dot co.uk> ---
Thanks for your comments. I can see there are two sides to this.
I was in the middle of composing the tract below. I'll include that anyway
because it took me ages to type. There's a bit at the end about people who
might get bitten if you do make this change, but a plausible alternative to
crashing the program might be to (a) print "(null)", and (b) leave the badbit
alone. I think I'd settle for that, I actually quite like the way the printf
family behaves.
My view of the badbit, BTW, is that it's not there to catch programming errors
- it's there to report adverse events that come up at runtime (e.g. cannot open
file). I expand on that below.
-----
The code I posted was by way of example. I didn't realise at the time what was
causing the behaviour I was observing - this whole thing came up on
StackOverflow and you can see the thread here (please excuse me calling gcc
'naughty', I didn't have the full picture then):
https://stackoverflow.com/questions/50696746/c-template-class-instance-issue
I guess my point is that the way things are implemented currently is likely to
lead to subtle, undetected bugs. Not everyone checks for errors properly, and
not everyone (and that included me until just now) knows that if you want an
iostream to throw exceptions you have to tell it so. Result? People
innocently write code like that shown on in that thread and think they have
done all they need to. But they haven't.
So I see the current behaviour as being the worst of all worlds. After all,
ostream would likely crash if the pointer was invalid, so what's so special
about NULL? They are both programming errors, and not the sort of situation
you want to have to write extra code to handle explicitly. Throwing an
exception should be reserved for some external influence on the stream (such as
a remote file becoming inaccessible due to a network error, say), which you
*do* need to handle in your code.
To put it another way, what are you going to do in your exception handler if
you get a nullptr exception (whatever that is - is there even one?). Display
"nullptr encountered, operation aborted" to the user and bail out? That's not
going to impress your customer base. The reason I like bringing the program
down is that it provides an opportunity to generate a stack trace and post it
home somehow. But hopefully, the coding error is discovered before the code
even gets out into the field, if you do this.
[Additional note: I can see if you change the current behaviour you might get a
bit of flak from people whose programs "used to work fine". Well, they didn't,
and they should be grateful to you for alerting them to that fact.]
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Subject: [Bug fortran/86110] ICE in gfc_resolve_character_array_constructor, at fortran/array.c:2044
Date: Wed, 13 Jun 2018 19:38:00 -0000
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--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Wed Jun 13 19:37:50 2018
New Revision: 261561
URL: https://gcc.gnu.org/viewcvs?rev=261561&root=gcc&view=rev
Log:
2018-06-13 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86110
* array.c (gfc_resolve_character_array_constructor): Avoid NULL
pointer dereference.
2018-06-13 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86110
* gfortran.dg/pr86110.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr86110.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/array.c
trunk/gcc/testsuite/ChangeLog
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
Date: Wed, 13 Jun 2018 19:39:00 -0000
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Paul Sanders from comment #8)
> Thanks for your comments. I can see there are two sides to this.
>
> I was in the middle of composing the tract below. I'll include that anyway
> because it took me ages to type. There's a bit at the end about people who
> might get bitten if you do make this change, but a plausible alternative to
> crashing the program might be to (a) print "(null)", and (b) leave the
> badbit alone. I think I'd settle for that, I actually quite like the way
> the printf family behaves.
That would be another valid outcome of undefined behaviour, but would make it
much harder to detect the problem. Setting badbit makes it possible to detect
and take action (including calling std::abort() or throwing an exception, if
you want to).
> My view of the badbit, BTW, is that it's not there to catch programming
> errors - it's there to report adverse events that come up at runtime (e.g.
> cannot open file). I expand on that below.
Failure to open a file sets failbit, not badbit.
> After all, ostream would likely crash if the pointer was invalid, so what's
> so special about NULL?
It's detectable.
> [Additional note: I can see if you change the current behaviour you might
> get a bit of flak from people whose programs "used to work fine". Well,
> they didn't, and they should be grateful to you for alerting them to that
> fact.]
The program did work fine though, and anybody can verify that it does so
intentionally, not by accident:
https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=libstdc%2B%2B-v3/include/bits/ostream.tcc;h=e02ba55a6262b96ead90595e1aad56119a965844;hb=HEAD#l323
As the standard says:
Permissible undefined behavior ranges from ignoring the situation completely
with unpredictable results, to behaving during translation or program
execution in a documented manner characteristic of the environment (with or
without the issuance of a diagnostic message), to terminating a translation
or execution (with the issuance of a diagnostic message).
>From gcc-bugs-return-607150-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 19:40:04 2018
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86137] ubsan runtime error in c-format.c
Date: Wed, 13 Jun 2018 19:40:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
Yes, this code needs to be fixed to avoid undefined overflow (if argnum >
INT_MAX / 10 || (argnum == INT_MAX / 10 && *fcp - '0' > INT_MAX % 10),
record that overflow has occurred and don't do the arithmetic on argnum).
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
Date: Wed, 13 Jun 2018 19:40:00 -0000
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--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Jun 13 19:39:36 2018
New Revision: 261562
URL: https://gcc.gnu.org/viewcvs?rev=261562&root=gcc&view=rev
Log:
PR c++/86094 - wrong code with defaulted move ctor.
gcc/c-family/
* c-opts.c (c_common_post_options): Bump the current ABI version to
13. Set warn_abi_version and flag_abi_compat_version to the current
version rather than 0. Fix defaulting flag_abi_compat_version from
warn_abi_version.
gcc/cp/
* class.c (classtype_has_non_deleted_move_ctor): New.
* tree.c (maybe_warn_parm_abi, type_has_nontrivial_copy_init):
Handle v12 breakage.
Added:
trunk/gcc/testsuite/g++.dg/abi/invisiref2a.C
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-opts.c
trunk/gcc/common.opt
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/tree.c
trunk/gcc/doc/invoke.texi
trunk/gcc/testsuite/g++.dg/abi/macro0.C
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
Date: Wed, 13 Jun 2018 19:40:00 -0000
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--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Jun 13 19:39:53 2018
New Revision: 261563
URL: https://gcc.gnu.org/viewcvs?rev=261563&root=gcc&view=rev
Log:
PR c++/86094 - wrong code with defaulted move ctor.
gcc/c-family/
* c-opts.c (c_common_post_options): Bump the current ABI version to
13. Set warn_abi_version and flag_abi_compat_version to the current
version rather than 0. Fix defaulting flag_abi_compat_version from
warn_abi_version.
gcc/cp/
* class.c (classtype_has_non_deleted_move_ctor): New.
* tree.c (maybe_warn_parm_abi, type_has_nontrivial_copy_init):
Handle v12 breakage.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/abi/invisiref2a.C
Modified:
branches/gcc-8-branch/gcc/c-family/ChangeLog
branches/gcc-8-branch/gcc/c-family/c-opts.c
branches/gcc-8-branch/gcc/common.opt
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/class.c
branches/gcc-8-branch/gcc/cp/cp-tree.h
branches/gcc-8-branch/gcc/cp/tree.c
branches/gcc-8-branch/gcc/doc/invoke.texi
branches/gcc-8-branch/gcc/testsuite/g++.dg/abi/macro0.C
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
Date: Wed, 13 Jun 2018 19:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86130
--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
As a data point, calling printf ("%s", p) does lead to a segfault in Glibc for
a null p because GCC turns the call into puts(p) which doesn't have the same
feature (see https://sourceware.org/bugzilla/show_bug.cgi?id=5618 for the
background).
I think most users prefer invalid uses of pointers to fail loudly so they can
be caught early. Few users expect output functions to fail, and even fewer
bother to check for failures when writing to standard streams.
Besides the inserter without the test resulting in more efficient code and GCC
emitting a warning when a null pointer is passed to it (it doesn't now even
though it should because of the strlen call), leaving it to the compiler to
deal with can also lead to better code downstream thanks to
-fdelete-null-pointer-checks.
>From gcc-bugs-return-607154-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 19:52:23 2018
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From: "chefmax at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/86090] [ASAN] ASAN does not properly configure libbacktrace.
Date: Wed, 13 Jun 2018 19:52:00 -0000
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--- Comment #3 from chefmax at gcc dot gnu.org ---
Author: chefmax
Date: Wed Jun 13 19:51:42 2018
New Revision: 261564
URL: https://gcc.gnu.org/viewcvs?rev=261564&root=gcc&view=rev
Log:
2018-06-13 Denis Khalikov <d.khalikov@partner.samsung.com>
libsanitizer/
PR sanitizer/86090
* configure.ac: Check for lstat and readlink.
* configure, config.h.in: Rebuild.
Modified:
trunk/libsanitizer/ChangeLog
trunk/libsanitizer/config.h.in
trunk/libsanitizer/configure
trunk/libsanitizer/configure.ac
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From: "franke at computer dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86138] New: C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Wed, 13 Jun 2018 19:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86138
Bug ID: 86138
Summary: C++17: getline(istream, string) crashes on Cygwin
because incompatible C++14 function is called
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
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The function std::getline(istream &, string &, char) crashes if build with
Cygwin gcc-g++-7.3.0-2 and -std=gnu++17 enabled.
This is because there is a bogus prototype specialization in basic_string.h:
template<>
basic_istream<char>&
getline(basic_istream<char>& __in, basic_string<char>& __str,
char __delim);
There is no implementation for this specialization. This has apparently the
same effect as the 'extern template' which is disabled for C++17 in
basic_string.tcc:
#if _GLIBCXX_EXTERN_TEMPLATE > 0 && __cplusplus <= 201402L
...
extern template
basic_istream<char>&
getline(basic_istream<char>&, string&, char);
...
#endif
As a consequence, no C++17 compatible code for this getline() is generated and
the old getline() from cygstdc++-6.dll is called instead.
AFAICS the above still holds for current SVN trunk release 261563.
For a testcase and a proposed patch see:
https://cygwin.com/ml/cygwin/2018-06/msg00125.html
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From: "sabetaytoros at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
Date: Wed, 13 Jun 2018 20:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86135
--- Comment #9 from Sabetay Toros <sabetaytoros at gmail dot com> ---
I´ve examined your link. This is not the same case as you are stating. I am
not initializing a vector with an initializer list, rather I am trying to
initialize only one object member with a universal initialiazer. And all
modern C++ books suggest not to use C++98 style initiliazers, just because
they are confusing.
After constructing the object I am putting to a vector.
This is very very simple case.
And besides what is your solution to this issue.
How the user will be able to find that kind of errors.
In these cases gcc must not give a runtime error message but compiler
error message.
On Wed, Jun 13, 2018 at 9:00 PM, redi at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86135
>
> --- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> http://en.cppreference.com/w/cpp/language/list_initialization#Notes shows
> a
> similar example, demonstrating the different behaviour for initializer_list
> constructors. std::vector has an initializer-list constructor, so trying to
> move-construct a vector<object_t> when object_t can be constructed from
> std::vector<object_t> will result in infinite recursion.
>
> This special case only applies to list-initialization, because it's
> related to
> constructors taking a std::initializer_list. It's totally wrong to say that
> list-init and direct-init must do the same thing in the presence of
> initializer-list constructors. If they did the same thing there would have
> been
> no need to introduce list-initialization syntax in the first place.
>
> --
> You are receiving this mail because:
> You reported the bug.
>
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Subject: [Bug c++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
Date: Wed, 13 Jun 2018 20:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86135
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You didn't provide a proper testcase so nobody can possibly explain why your
code crashes.
If it's similar to the code in comment 3 then model_t<std::vector<object_t>>
tries to construct a vector<object_t> from a vector<object_t> using list-init
which chooses the initializer_list constructor because object_t can be
constructed from vector<object_t>. It's the same bug 85577.
>From gcc-bugs-return-607158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 20:18:35 2018
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Subject: [Bug fortran/86110] ICE in gfc_resolve_character_array_constructor, at fortran/array.c:2044
Date: Wed, 13 Jun 2018 20:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86110
--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Wed Jun 13 20:17:58 2018
New Revision: 261565
URL: https://gcc.gnu.org/viewcvs?rev=261565&root=gcc&view=rev
Log:
2018-06-13 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86110
* array.c (gfc_resolve_character_array_constructor): Avoid NULL
pointer dereference.
2018-06-13 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86110
* gfortran.dg/pr86110.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr86110.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/array.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/86114] [8/9 Regression] ICE in gimple_fold_builtin_strlen with an invalid call to strnlen
Date: Wed, 13 Jun 2018 20:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86114
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Wed Jun 13 20:29:04 2018
New Revision: 261567
URL: https://gcc.gnu.org/viewcvs?rev=261567&root=gcc&view=rev
Log:
PR tree-optimization/86114 - ICE in gimple_fold_builtin_strlen with an invalid
call to strnlen
gcc/testsuite/ChangeLog:
PR tree-optimization/86114
* gcc.dg/pr86114.c: New test.
gcc/ChangeLog:
PR tree-optimization/86114
* gimple-fold.c (gimple_fold_builtin_strlen): Only handle LHS
of integer types.
* tree-ssa-strlen.c (maybe_set_strlen_range): Same.
Added:
trunk/gcc/testsuite/gcc.dg/pr86114.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-fold.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-strlen.c
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Subject: [Bug tree-optimization/86114] [8/9 Regression] ICE in gimple_fold_builtin_strlen with an invalid call to strnlen
Date: Wed, 13 Jun 2018 20:30:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed by r261567.
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From: "p.sanders at alpinesoft dot co.uk" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
Date: Wed, 13 Jun 2018 20:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86130
--- Comment #11 from Paul Sanders <p.sanders at alpinesoft dot co.uk> ---
> I think most users prefer invalid uses of pointers to fail loudly so they can be caught early. Few users expect output functions to fail, and even fewer bother to check for failures when writing to standard streams.
Yes, that's very much my own personal preference, but as I dig into this more I
can see there are problems with doing what I'm asking for.
> Removing this longstanding behaviour now could break an unknown number of programs which are (implicitly or explicitly) relying on this behaviour of libstdc++.
I think they'd have to be relying on it explicitly (i.e. they turn on badbit
exceptions or check explicitly for badbit). Otherwise, they have a bug.
Question is, how many are there out there? I doubt many are testing badbit.
Not for this reason, anyway.
There is however, some info at
[cppreference](http://en.cppreference.com/w/cpp/io/ios_base/iostate) which
supports your view. Passing in quite a few types as nullptr sets badbit (too
many, IMO), but `char *` is not mentioned explicitly.
So I suppose it's reasonable for people to expect that _all_ null pointers
should be treated in the same way. It's a shame anyone on the standards
committee ever thought that testing for null pointers in this way was useful
but I suppose we're stuck with it now. Personally, I think it was a big
mistake.
> Failure to open a file sets failbit, not badbit.
Noted, thank you, I'm not very familiar with iostreams. Forget that bit then.
> The program did work fine though, and anybody can verify that it does so intentionally, not by accident.
Nice link, thank you, but that doesn't change the basic argument that many
programs will not be working quite right because they accidentally passed in a
null pointer and didn't expect the resulting behaviour of `ostream`. Still, I
might in the end have to say here, sadly: c'est la vie.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86114] [8/9 Regression] ICE in gimple_fold_builtin_strlen with an invalid call to strnlen
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Wed Jun 13 20:39:50 2018
New Revision: 261569
URL: https://gcc.gnu.org/viewcvs?rev=261569&root=gcc&view=rev
Log:
PR tree-optimization/86114 - ICE in gimple_fold_builtin_strlen with an invalid
call to strnlen
gcc/testsuite/ChangeLog:
PR tree-optimization/86114
* gcc.dg/pr86114.c: New test.
gcc/ChangeLog:
PR tree-optimization/86114
* gimple-fold.c (gimple_fold_builtin_strlen): Only handle LHS
of integer types.
* tree-ssa-strlen.c (maybe_set_strlen_range): Same.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr86114.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/gimple-fold.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-ssa-strlen.c
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Subject: [Bug tree-optimization/86114] ICE in gimple_fold_builtin_strlen with a call to an invalid strlen declaration
Date: Wed, 13 Jun 2018 20:41:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] ICE in |ICE in
|gimple_fold_builtin_strlen |gimple_fold_builtin_strlen
|with an invalid call to |with a call to an invalid
|strnlen |strlen declaration
Known to fail|9.0 |
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Backported to GCC 8 in r261569.
>From gcc-bugs-return-607164-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 20:54:18 2018
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From: "p.sanders at alpinesoft dot co.uk" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
Date: Wed, 13 Jun 2018 20:54:00 -0000
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--- Comment #12 from Paul Sanders <p.sanders at alpinesoft dot co.uk> ---
Sorry, I posted that in a bit of a rush. I took a proper look and the null
pointers that set badbit actually make excellent sense.
So I'll suggest a way out of the backwards compatibility conundrum when
`ostream::operator<<` is passed a null pointer (of any sort). The suggestion I
have is to test for a null pointer _only_ if the stream is set up to throw
badbit exceptions Otherwise, just blindly dereference the pointer and crash.
The rationale for this is that people who have set up an exception handler for
badbit _might_ just have done so to catch null pointers. I think it's unlikely
but it's possible. Those who haven't are probably getting away with something
they shouldn't.
Any interest?
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
Date: Wed, 13 Jun 2018 21:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86130
--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #10)
> As a data point, calling printf ("%s", p) does lead to a segfault in Glibc
> for a null p because GCC turns the call into puts(p)
Only when optimization is enabled.
I'm not suggesting we should print "(null)", that would be crazy, I'm just
demonstrating that expecting a segfault for this kind of error is not a safe or
valid assumption.
> which doesn't have the
> same feature (see https://sourceware.org/bugzilla/show_bug.cgi?id=5618 for
> the background).
>
> I think most users prefer invalid uses of pointers to fail loudly so they
> can be caught early. Few users expect output functions to fail, and even
> fewer bother to check for failures when writing to standard streams.
Agreed, but this code has been present since r53839 in 2002, and there's an
explicit test for that behaviour:
testsuite/27_io/basic_ostream/inserters_character/char/8.cc
This is not an accident, it's a supported feature (and arguably documented, by
the code and the test).
> Besides the inserter without the test resulting in more efficient code and
> GCC emitting a warning when a null pointer is passed to it (it doesn't now
> even though it should because of the strlen call), leaving it to the
> compiler to deal with can also lead to better code downstream thanks to
> -fdelete-null-pointer-checks.
I think there would need to be a period of deprecation and an optional
assertion enabled by _GLIBCXX_ASSERTIONS before we can do that (assuming we
want to).
If we were starting from scratch I wouldn't add the check (e.g. see the patch
at https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00768.html that I proposed
today) but it's far too late to just turn this into a segfault because somebody
on stackoverflow found it surprising and doesn't know how to check iostreams
for errors.
>From gcc-bugs-return-607166-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 21:32:46 2018
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86130
--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Paul Sanders from comment #12)
> Any interest?
Good grief, no.
That would generate even worse code than what we have now, and it's possible to
test for badbit without enabling exceptions. You keep making assumptions about
what everyone else's programs do, and we have no way of knowing what the
majority of libstdc++ users expect from this code, or how much code relies on
the current behaviour.
>From gcc-bugs-return-607167-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 21:55:00 2018
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86130
--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #13)
> This is not an accident, it's a supported feature (and arguably documented,
> by the code and the test).
See also Bug 6518 which changed the segfault to setting failbit (and introduced
a regression) and Bug 6750 which introduced the current behaviour.
>From gcc-bugs-return-607168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 22:03:24 2018
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Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Wed, 13 Jun 2018 22:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86138
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Christian Franke from comment #0)
> As a consequence, no C++17 compatible code for this getline() is generated
> and the old getline() from cygstdc++-6.dll is called instead.
Why is the one in the DLL not compatible?
The extern templates are disabled because std::basic_string has additional
member functions in C++17 mode, and they're not instantiated in the library. By
disabling the explicit instantiation declarations the compiler will emit
definitions for the C++17-only member functions.
But there's nothing wrong with the getline instantiation in the DLL, it's
identical to what would be defined for C++17.
> AFAICS the above still holds for current SVN trunk release 261563.
>
> For a testcase and a proposed patch see:
> https://cygwin.com/ml/cygwin/2018-06/msg00125.html
As requested at https://gcc.gnu.org/bugs testcases need to be provided here,
not as URLs.
>From gcc-bugs-return-607169-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 22:06:13 2018
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Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86138
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Only the std::string and std::wstring instantiations are problematic for C++17.
This should be a better fix, i.e. allow the getline instantiations to be used
even in C++17 mode:
--- a/libstdc++-v3/include/bits/basic_string.tcc
+++ b/libstdc++-v3/include/bits/basic_string.tcc
@@ -1597,8 +1597,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// Inhibit implicit instantiations for required instantiations,
// which are defined via explicit instantiations elsewhere.
-#if _GLIBCXX_EXTERN_TEMPLATE > 0 && __cplusplus <= 201402L
+#if _GLIBCXX_EXTERN_TEMPLATE > 0
+#if __cplusplus <= 201402L
extern template class basic_string<char>;
+#endif
extern template
basic_istream<char>&
operator>>(basic_istream<char>&, string&);
@@ -1613,7 +1615,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
getline(basic_istream<char>&, string&);
#ifdef _GLIBCXX_USE_WCHAR_T
+#if __cplusplus <= 201402L
extern template class basic_string<wchar_t>;
+#endif
extern template
basic_istream<wchar_t>&
operator>>(basic_istream<wchar_t>&, wstring&);
>From gcc-bugs-return-607170-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 22:07:54 2018
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From: "p.sanders at alpinesoft dot co.uk" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/86130] Expect SIGSEGV but program just silently exits
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86130
--- Comment #16 from Paul Sanders <p.sanders at alpinesoft dot co.uk> ---
Interesting, I can see why you don't want to change the behaviour again. It's
just a shame it ever did anything other than SEGFAULT in the first place but as
you point out, it's been the way it is for a long time now and changing it
would be foolhardy.
Just to finish off (I see that the decision is made):
> this code has been present since r53839 in 2002 ... [and] it's far too late to just turn this into a segfault because somebody on stackoverflow found it surprising and doesn't know how to check iostreams for errors.
I'm sure myself and the OP aren't the only ones ever to have been 'surprised'
by this, and more will follow. I will update my answer at SO to explain what
is really happening and how to fix it (the original code wasn't my own).
Thank you for taking the time to lay things out for me, I learnt a lot here,
even if I still don't like the way ostream behaves under these circumstances.
It seems to me that badbit's job is to reflect whether or not the stream is in
a usable state, and not get set just because something strange has been passed
to the stream which does it no actual harm. It (badbit) just got abused back
in 2002, so to speak, and now we're stuck with it.
And finally, I owe you an apology for ever thinking that ostream would silently
terminate your program like that; I posted one on SO. I hope it does some good,
I don't set out to aggravate you guys.
>From gcc-bugs-return-607171-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 22:41:50 2018
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Subject: [Bug fortran/86110] ICE in gfc_resolve_character_array_constructor, at fortran/array.c:2044
Date: Wed, 13 Jun 2018 22:41:00 -0000
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--- Comment #5 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Wed Jun 13 22:40:46 2018
New Revision: 261575
URL: https://gcc.gnu.org/viewcvs?rev=261575&root=gcc&view=rev
Log:
2018-06-13 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86110
* array.c (gfc_resolve_character_array_constructor): Avoid NULL
pointer dereference.
2018-06-13 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/86110
* gfortran.dg/pr86110.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr86110.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/array.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86134
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
I thought this was by design? I.e., that warnings about unknown -Wno- options
were suppressed unless/until a different kind of a warning is emitted.
>From gcc-bugs-return-607173-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 22:46:42 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86134] earlier diagnostic causes followup diagnostic about unknown -Wno-* options
Date: Wed, 13 Jun 2018 22:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86134
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
As per the recent discussion:
https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00422.html
>From gcc-bugs-return-607174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 22:50:29 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86110] ICE in gfc_resolve_character_array_constructor, at fortran/array.c:2044
Date: Wed, 13 Jun 2018 22:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86110
kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.4
--- Comment #6 from kargl at gcc dot gnu.org ---
Fixed on 7-branch, 8-branch, and trunk.
Thanks for the bug report.
>From gcc-bugs-return-607175-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 13 23:42:32 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 libstdc++/83982] [6/7/8/9 Regression] Exception guarantee of C++14 vector::resize(size_type) is not met
Date: Wed, 13 Jun 2018 23:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83982
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Known to work| |5.5.0
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Summary|Exception guarantee of |[6/7/8/9 Regression]
|C++14 |Exception guarantee of
|vector::resize(size_type) |C++14
|is not met |vector::resize(size_type)
| |is not met
Known to fail| |6.4.0, 7.3.0, 8.1.0, 9.0
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This testcase passes when compiled by GCC 5 with no option (because that means
-std=gnu++98 and so elements are copied not moved):
#include <vector>
#include <assert.h>
struct X
{
X() : data(1)
{
if (fail)
throw 1;
}
static bool fail;
std::vector<int> data;
};
bool X::fail = false;
void
test01()
{
std::vector<X> v(2);
X* const addr = &v[0];
bool caught = false;
try {
X::fail = true;
v.resize(v.capacity() + 1); // force reallocation
} catch (int) {
caught = true;
}
assert( caught );
assert( v.size() == 2 );
assert( &v[0] == addr );
// PR libstdc++/83982
assert( ! v[0].data.empty() );
assert( ! v[1].data.empty() );
}
int
main()
{
test01();
}
But it fails when compiled by GCC 6 or later (except in C++98 modes), because
the existing elements are moved from and left empty. That makes this a
regression.
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Subject: [Bug c++/86099] [9 Regression] internal compiler error: in cx_check_missing_mem_inits, at cp/constexpr.c:815
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
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Subject: [Bug c++/86099] [9 Regression] internal compiler error: in cx_check_missing_mem_inits, at cp/constexpr.c:815
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607178-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 00:03:40 2018
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Subject: [Bug c++/86099] [9 Regression] internal compiler error: in cx_check_missing_mem_inits, at cp/constexpr.c:815
Date: Thu, 14 Jun 2018 00:03:00 -0000
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Jun 14 00:02:42 2018
New Revision: 261576
URL: https://gcc.gnu.org/viewcvs?rev=261576&root=gcc&view=rev
Log:
PR c++/86099 - ICE with trivial copy and non-trivial default ctor.
* constexpr.c (instantiate_cx_fn_r): Don't synthesize trivial
constructors.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/nsdmi-template18.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
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From: "doko at debian dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86139] New: [7/8/9 Regression] ICE in in store_constructor, at expr.c:6849 on aarch64-linux-gnu and arm-linux-gnueabihf
Date: Thu, 14 Jun 2018 00:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86139
Bug ID: 86139
Summary: [7/8/9 Regression] ICE in in store_constructor, at
expr.c:6849 on aarch64-linux-gnu and
arm-linux-gnueabihf
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: doko at debian dot org
Target Milestone: ---
[forwarded from https://bugs.debian.org/901290]
seen when building a recent version of chromium-browser on aarch64-linux-gnu
and arm-linux-gnueabihf. The reduced test case was made with a gcc-8 cross
arm-linux-gnueabihf gcc.
according to the bug reporter it fails on armhf in 6, 7 and 8, on arm64 on 7
and 8.
$ cat preprocessed.i
typedef int a;
typedef int c;
typedef char d;
typedef unsigned short f;
typedef long long g;
typedef float __attribute__((vector_size(16))) aa;
typedef c bv;
typedef g __attribute__((vector_size(32))) bw;
typedef f __attribute__((vector_size(8))) bx;
bv h, i;
aa *l;
bx m, n, o;
char q;
f *s;
f u;
void *memcpy(void *v, void *w, a z) {
return __builtin___memcpy_chk(v, w, z, 0);
}
typedef struct {
} ac;
typedef struct {
} e;
typedef struct {
} agab(ac *);
typedef enum {
ao,
ad,
ab,
ar,
as,
ae,
af,
ag,
ak,
ah,
ai,
aj,
ba,
al,
am,
an,
be,
ap,
aq,
av,
aw,
at,
au,
az,
bm,
ax,
ay,
bp,
bq,
bb,
bc,
bd,
bi,
bf,
bg,
bh,
by,
bj,
bk,
bl,
ca,
bn,
bo,
bt,
bu,
br
} bs;
void bz(bx);
bx cc();
f cb();
bx cd(bv v) {
d *j = 0;
bx k = {cb(j, v)};
return k;
}
void ce() {
__attribute__((__vector_size__(4 * sizeof(short)))) unsigned short p = n,
k = p;
m = k;
o = cd(h);
}
bs t;
void x() {
aa r, b;
while (1)
switch (t) {
case ao:
case ad:
case ab:
case ar:
case as:
case ae:
case af:
case ag:
case ak: {
bw a;
__builtin_memcpy(&a, s, 4);
bx y = {(a & 5)[3]};
bz(y);
}
case ah:
case ai:
case aj:
case ba:
case al:
case am:
case an:
case be:
case ap:
case aq:
case av:
case aw:
case at:
case au:
case az:
case bm:
case ax:
case ay:
case bp:
case bq:
case bb:
case bc:
case bd:
case bi:
case bf:
case bg:
break;
case bh:
case by: {
bx c = (bx){r[2]} | (bx){b[2]};
__builtin_memcpy(&q + i, &c, 2 * 4);
}
case bj:
case bk:
case bl:
case ca:
case bn:
case bo:
return;
case bt: {
bx y = cc();
bw d = u | (bw){y[2]};
__builtin_memcpy(s, &d, 4);
}
case bu:
case br:;
}
}
void cf() {}
$ arm-linux-gnueabihf-gcc-8 -c -std=gnu11 -O0 -Wall -Wextra preprocessed.i
during RTL pass: expand
preprocessed.i: In function 'x':
preprocessed.i:88:6: internal compiler error: in store_constructor, at
expr.c:6849
void x() {
^
Please submit a full bug report,
with preprocessed source if appropriate.
gcc configured with
-v --with-pkgversion='Debian 8.1.0-4'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8 --enable-shared
--enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm
--disable-libquadmath --disable-libquadmath-support --enable-plugin
--enable-default-pie --with-system-zlib --with-target-system-zlib
--enable-multiarch --disable-sjlj-exceptions --with-arch=armv7-a
--with-fpu=vfpv3-d16 --with-float=hard --with-mode=thumb --disable-werror
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=arm-linux-gnueabihf --program-prefix=arm-linux-gnueabihf-
--includedir=/usr/arm-linux-gnueabihf/include
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From: "roland at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/77609] __attribute__((section(".note.foo"))) forces SHT_PROGBITS though the assembler would use SHT_NOTE
Date: Thu, 14 Jun 2018 01:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77609
--- Comment #5 from roland at gcc dot gnu.org ---
Author: roland
Date: Thu Jun 14 01:18:59 2018
New Revision: 261581
URL: https://gcc.gnu.org/viewcvs?rev=261581&root=gcc&view=rev
Log:
PR other/77609: Let the assembler choose ELF section types for miscellaneous
named sections
gcc/
PR other/77609
* varasm.c (default_section_type_flags): Set SECTION_NOTYPE for
any section for which we don't know a specific type it should have,
regardless of name. Previously this was done only for the exact
names ".init_array", ".fini_array", and ".preinit_array".
(default_elf_asm_named_section): Add comment about
relationship with default_section_type_flags and SECTION_NOTYPE.
(get_section): Don't consider it a type conflict if one side has
SECTION_NOTYPE and the other doesn't, as long as neither has the
SECTION_BSS et al used in the default_section_type_flags logic.
(cherry picked from commit db7548a2771bbf34cf7430712af7ac670b429958)
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/varasm.c
>From gcc-bugs-return-607181-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 03:17:32 2018
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From: "redbeard0531 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86140] New: constprop clones with identical bodies
Date: Thu, 14 Jun 2018 03:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86140
Bug ID: 86140
Summary: constprop clones with identical bodies
Product: gcc
Version: 9.0
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This was tweaked example code to demonstrate something totally unrelated, but I
noticed it was doing the constprop clone thing for functions with identical
instructions, which seemed odd. While this exact case doesn't matter, it seemed
like it might be a sign of a deeper bug.
https://godbolt.org/g/Zwpi7J
[[gnu::noinline]] void f(const int*){
asm volatile("");
}
void good() {
constexpr static int arr[1000] = {};
f(arr);
}
void bad() {
constexpr int arr[1000] = {};
f(arr);
}
f(int const*) [clone .constprop.0]:
ret
f(int const*) [clone .constprop.1]:
ret
f(int const*):
ret
good():
jmp f(int const*) [clone .constprop.0]
bad():
jmp f(int const*) [clone .constprop.1]
>From gcc-bugs-return-607182-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 05:42:42 2018
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From: "sabetaytoros at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
Date: Thu, 14 Jun 2018 05:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86135
--- Comment #11 from Sabetay Toros <sabetaytoros at gmail dot com> ---
Here is my test case. The issue is in line 30. Please change the line
commented with direct initilization.
It wont crash.
If you are right list initializers is not usable.
I hope you have an answer.
#include <iostream>using namespace std;#include <vector>#include
<algorithm> #include <limits>#include <math.h>#include
<memory>#include <assert.h>#include <sstream>template <typename T>void
Draw(ostream& os, const T& Entry) {
os << Entry << endl;}
struct TObject {
template<typename T>
TObject(T e) : Self(make_shared<TModel<T>>(move(e))) {}
friend void Draw(ostream& os, const TObject& Entry) {
Entry.Self->ModelDraw(os);
}
private :
struct TConcept {
virtual ~TConcept() = default;
virtual void ModelDraw(ostream& os) const = 0;
};
shared_ptr<const TConcept> Self;
template<typename T>
struct TModel final : TConcept {
TModel(T e) : Data { move(e) } { }
// It seems the issue is in this line, initiliazer list C++11
version does not work
// TModel(T e) : Data ( move(e) ) { }
// C++98 style is working.
void ModelDraw(ostream& os) const {
Draw(os, Data);
}
T Data;
};
};class TMyClass {public :
string s;
TMyClass(string e) : s(move(e)) {};
friend void Draw(ostream& os, const TMyClass& E) {
os << E.s << endl;
}};using TDocument = vector<TObject>;void Draw(ostream& os, const
TDocument& vDoc) {
os << " Document Print ------------------" << endl;
for(const auto& e: vDoc)
Draw(os,e);
os << endl;}using THistory = vector<TDocument>;TDocument&
GetCurrent(THistory& vHstry) {
return vHstry.back();}void SaveHistory(THistory& vHstry) {
vHstry.push_back(vHstry.back());}int main(int argc, char** argv) {
TDocument vDoc;
THistory vHstry(1);
GetCurrent(vHstry).emplace_back(1);
GetCurrent(vHstry).emplace_back(3.2);
GetCurrent(vHstry).emplace_back(" This is a try");
GetCurrent(vHstry).emplace_back(" My Class ");
GetCurrent(vHstry).emplace_back(GetCurrent(vHstry));
Draw(cout , GetCurrent(vHstry));
return 0;}
On Wed, Jun 13, 2018 at 11:04 PM, redi at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86135
>
> --- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> You didn't provide a proper testcase so nobody can possibly explain why
> your
> code crashes.
>
> If it's similar to the code in comment 3 then
> model_t<std::vector<object_t>>
> tries to construct a vector<object_t> from a vector<object_t> using
> list-init
> which chooses the initializer_list constructor because object_t can be
> constructed from vector<object_t>. It's the same bug 85577.
>
> --
> You are receiving this mail because:
> You reported the bug.
>
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86141] New: C++ Related Optimization Problem
Date: Thu, 14 Jun 2018 05:45:00 -0000
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Bug ID: 86141
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Created attachment 44269
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44269&action=edit
Source code which demonstrates the optimization problem
GCC does not optimize this code correctly however LLVM, ELLCC, ZAPCC, Intel and
Microsoft compilers do. I tried several optimization levels but none were able
to expand the function invocation inline where as the other compiler vendors
all did so with default optimization levels.
This was strictly experimental code which incidentally revealed the
optimization issue when I looked at the resulting Assembly on godbolt.org using
the various compilers. I do not require support for the bug, thank you.
>From gcc-bugs-return-607184-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 05:47:43 2018
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Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
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--- Comment #1 from ASA <aaron_sami_abassi at hotmail dot com> ---
Created attachment 44270
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Assembly output from GCC 7.3.0
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Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
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--- Comment #2 from ASA <aaron_sami_abassi at hotmail dot com> ---
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Assembly output from clang++ 5.0.0
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Subject: [Bug c++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.
Date: Thu, 14 Jun 2018 05:50:00 -0000
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--- Comment #12 from Sabetay Toros <sabetaytoros at gmail dot com> ---
Created attachment 44272
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Testi case for crashed initialiazer list
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
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--- Comment #3 from ASA <aaron_sami_abassi at hotmail dot com> ---
Comment on attachment 44271
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44271
Assembly output from clang++ 5.0.0
clang++ -O -S gccbug.cpp
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From: "aaron_sami_abassi at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
Date: Thu, 14 Jun 2018 05:51:00 -0000
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--- Comment #4 from ASA <aaron_sami_abassi at hotmail dot com> ---
Comment on attachment 44270
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Assembly output from g++ 7.3.0
g++ -O -S gccbug.cpp
>From gcc-bugs-return-607189-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 05:52:08 2018
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From: "ensadc at mailnesia dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86142] New: hard error for bad delete-expression in SFINAE context
Date: Thu, 14 Jun 2018 05:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86142
Bug ID: 86142
Summary: hard error for bad delete-expression in SFINAE context
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ensadc at mailnesia dot com
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https://wandbox.org/permlink/9gfZwtKZC9Tu92fs
----
template<class T, class = decltype(delete T())>
void f();
template<class T>
int f(...);
int x = f<int>();
int y = f<int(*)()>();
int z = f<void*>();
----
prog.cc: In substitution of 'template<class T, class> void f() [with T = int;
<template-parameter-1-2> = <missing>]':
prog.cc:7:16: required from here
prog.cc:1:19: error: type 'int' argument given to 'delete', expected pointer
template<class T, class = decltype(delete T())>
^~~~~
prog.cc: In substitution of 'template<class T, class> void f() [with T = int
(*)(); <template-parameter-1-2> = <missing>]':
prog.cc:8:21: required from here
prog.cc:1:19: error: cannot delete a function. Only pointer-to-objects are
valid arguments to 'delete'
prog.cc: In substitution of 'template<class T, class> void f() [with T = void*;
<template-parameter-1-2> = <missing>]':
prog.cc:9:18: required from here
prog.cc:1:19: warning: deleting 'void*' is undefined [-Wdelete-incomplete]
prog.cc:9:18: error: call of overloaded 'f<void*>()' is ambiguous
int z = f<void*>();
^
prog.cc:2:6: note: candidate: 'void f() [with T = void*;
<template-parameter-1-2> = void]'
void f();
^
prog.cc:4:5: note: candidate: 'int f(...) [with T = void*]'
int f(...);
^
----
These variable definitions should call the second overload of `f`. No warning
or error should be triggered.
The code is accepted by clang.
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Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
Date: Thu, 14 Jun 2018 05:58:00 -0000
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Try renaming main first. Gcc knows that main is only called once ever so gcc's
inling heuristics are different inside main.
>From gcc-bugs-return-607191-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 06:05:24 2018
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From: "aaron at aarongraham dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86143] New: ICE capturing constexpr chrono duration
Date: Thu, 14 Jun 2018 06:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86143
Bug ID: 86143
Summary: ICE capturing constexpr chrono duration
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: aaron at aarongraham dot com
Target Milestone: ---
The following test, compiled via 'g++ -c test.cc':
#include <chrono>
#include <thread>
using namespace std::chrono_literals;
extern void set_duration(std::chrono::nanoseconds);
int main() {
constexpr auto dur = 1ms;
std::thread([]{ set_duration(dur); }).join();
}
Result:
during RTL pass: expand
test.cc: In lambda function:
test.cc:9:32: internal compiler error: in make_decl_rtl, at varasm.c:1322
std::thread([]{ set_duration(dur); }).join();
^~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler built for ARM (arm-unknown-linux-gnueabi)
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Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
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--- Comment #6 from ASA <aaron_sami_abassi at hotmail dot com> ---
(In reply to Andrew Pinski from comment #5)
> Try renaming main first. Gcc knows that main is only called once ever so
> gcc's inling heuristics are different inside main.
Same result.
>From gcc-bugs-return-607193-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 07:00:32 2018
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Subject: [Bug target/86133] powerpc (-mcpu…48) internal compiler error for double variables
Date: Thu, 14 Jun 2018 07:00:00 -0000
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Arseny Solokha <asolokha at gmx dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |asolokha at gmx dot com
--- Comment #2 from Arseny Solokha <asolokha at gmx dot com> ---
I've reproduced the ICE w/ gcc-9.0.0-alpha20180610 snapshot (r261389) after
adding -mcall-eabi to the command line. As for generation of SPE instructions
even w/ -mno-spe, it's a separate issue and is likely a duplicate of PR37759.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/86136] Modular multiplication optimization
Date: Thu, 14 Jun 2018 07:22:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-14
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
So
(simplify
(trunc_mod (mult @0 INTEGER_CST@1) INTEGER_CST@2)
(trunc_mod (mult @0 (trunc_mod @1 @2)) @2))
if (trunc_mod @1 @2) is smaller than @1.
I suspect this doesn't hold if the multiplication may overflow?
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86139] [7/8/9 Regression] ICE in in store_constructor, at expr.c:6849 on aarch64-linux-gnu and arm-linux-gnueabihf
Date: Thu, 14 Jun 2018 07:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Target Milestone|--- |7.4
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Subject: [Bug middle-end/86140] constprop clones with identical bodies
Date: Thu, 14 Jun 2018 07:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86140
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
CC| |mliska at suse dot cz
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's only a missed optimization - ICF could have merged the functions again
and/or IPA SRA could have removed the unused parameter from f().
>From gcc-bugs-return-607197-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 07:41:08 2018
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Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
Date: Thu, 14 Jun 2018 07:41:00 -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| |2018-06-14
CC| |hubicka at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
When you rename main() to foo() the calls are inlined. GCC doesn't inline them
into main() because it knows they are executed exactly once which means they
are cold and thus code growth doesn't outweight performance increase.
With -Winline you see:
t.C: In function ‘int main()’:
t.C:31:1: warning: inlining failed in call to ‘void DisplayViewType(const
ViewType&)’: call is unlikely and code size would grow [-Winline]
DisplayViewType( const ViewType& view ) {
^~~~~~~~~~~~~~~
t.C:38:20: note: called from here
DisplayViewType( ViewType::view2( data ) );
~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
t.C:31:1: warning: inlining failed in call to ‘void DisplayViewType(const
ViewType&)’: call is unlikely and code size would grow [-Winline]
DisplayViewType( const ViewType& view ) {
^~~~~~~~~~~~~~~
t.C:37:20: note: called from here
DisplayViewType( ViewType::view1( data ) );
~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
of course in the end the size heuristics are off and inlining would reduce
code size.
>From gcc-bugs-return-607198-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 07:50:23 2018
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Subject: [Bug c/86134] earlier diagnostic causes followup diagnostic about unknown -Wno-* options
Date: Thu, 14 Jun 2018 07:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86134
--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 13 Jun 2018, msebor at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86134
>
> --- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
> As per the recent discussion:
> https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00422.html
But the warning should never be elided to an error with -Werror.
> echo 'int main(){}' | gcc -S -x c -Wno-unknown-warning-option -Wall
-Werror -Wno-error=return-type -
<stdin>: In function ‘main’:
<stdin>:1:1: warning: control reaches end of non-void function
[-Wreturn-type]
<stdin>: At top level:
cc1: error: unrecognized command line option "-Wno-unknown-warning-option"
[-Werror]
cc1: all warnings being treated as errors
fails the compile but with the warning not emitted the error isn't
emitted. Also we do know the warning is guarded by -Wreturn-type
so I see no point in warning that it wasn't silenced by
-Wno-unknown-warning-option?
>From gcc-bugs-return-607200-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 08:18:24 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86139] [7/8/9 Regression] ICE in in store_constructor, at expr.c:6849 on aarch64-linux-gnu and arm-linux-gnueabihf
Date: Thu, 14 Jun 2018 08:18:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ktkachov at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
CC|kyrylo.tkachov at arm dot com |
--- Comment #1 from ktkachov at gcc dot gnu.org ---
I've reproduced an ICE on arm-none-linux-gnueabihf from GCC 6 onwards but
haven't been able to reproduce it on aarch64-none-linux-gnu.
Furthermore, the ICE on arm appears to me in a different place:
during GIMPLE pass: veclower
full.c: In function ‘x’:
full.c:88:6: internal compiler error: Segmentation fault
void x() {
^
0xbd7faf crash_signal
$SRC/gcc/gcc/toplev.c:324
0xe4067f contains_struct_check
$SRC/gcc/gcc/tree.h:3230
0xe4067f expand_vector_parallel
$SRC/gcc/gcc/tree-vect-generic.c:328
0xe45928 expand_vector_operation
$SRC/gcc/gcc/tree-vect-generic.c:1007
0xe45928 expand_vector_operations_1
$SRC/gcc/gcc/tree-vect-generic.c:1801
0xe45928 expand_vector_operations
$SRC/gcc/gcc/tree-vect-generic.c:1832
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.
when compiled with (the equivalent to the given configure line) -std=gnu11 -O0
-Wall -Wextra -march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=hard -mthumb
Note that -mfpu=vfpv3-d16 means there's no NEON available.
With -mfpu=neon the ICE doesn't appear.
Looks like some kind of vec lowering bug when SIMD is not available on a
target?
>From gcc-bugs-return-607202-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 08:18:25 2018
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Subject: [Bug middle-end/86140] constprop clones with identical bodies
Date: Thu, 14 Jun 2018 08:18:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-14
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
I'll take a look.
>From gcc-bugs-return-607201-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 08:18:24 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/86132] Failure to elide condition known to be non-null
Date: Thu, 14 Jun 2018 08:18:00 -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| |2018-06-14
CC| |hubicka at gcc dot gnu.org,
| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Component|middle-end |ipa
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I see calls to want_foo () which can clobber 'object':
<bb 3> [local count: 187153200]:
_8 = single_slow ();
object = _8;
<bb 4> [local count: 1073741824]:
# prephitmp_16 = PHI <_8(3), object.1_7(2)>
want_foo (prephitmp_16);
object.1_4 = object;
if (object.1_4 == 0B)
goto <bb 5>; [17.43%]
else
goto <bb 6>; [82.57%]
that's the first issue we hit. Then I would expect jump threading to
eventually optimize this. I'm not sure returns_nonnull is handled
in the required places in optimizers though.
I'm not sure why IPA reference doesn't do its job here, it seems to be
confused by inlining?
>From gcc-bugs-return-607199-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 08:18:17 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86139] [7/8/9 Regression] ICE in in store_constructor, at expr.c:6849 on aarch64-linux-gnu and arm-linux-gnueabihf
Date: Thu, 14 Jun 2018 08:18:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ktkachov at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
--- Comment #1 from ktkachov at gcc dot gnu.org ---
I've reproduced an ICE on arm-none-linux-gnueabihf from GCC 6 onwards but
haven't been able to reproduce it on aarch64-none-linux-gnu.
Furthermore, the ICE on arm appears to me in a different place:
during GIMPLE pass: veclower
full.c: In function ‘x’:
full.c:88:6: internal compiler error: Segmentation fault
void x() {
^
0xbd7faf crash_signal
$SRC/gcc/gcc/toplev.c:324
0xe4067f contains_struct_check
$SRC/gcc/gcc/tree.h:3230
0xe4067f expand_vector_parallel
$SRC/gcc/gcc/tree-vect-generic.c:328
0xe45928 expand_vector_operation
$SRC/gcc/gcc/tree-vect-generic.c:1007
0xe45928 expand_vector_operations_1
$SRC/gcc/gcc/tree-vect-generic.c:1801
0xe45928 expand_vector_operations
$SRC/gcc/gcc/tree-vect-generic.c:1832
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.
when compiled with (the equivalent to the given configure line) -std=gnu11 -O0
-Wall -Wextra -march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=hard -mthumb
Note that -mfpu=vfpv3-d16 means there's no NEON available.
With -mfpu=neon the ICE doesn't appear.
Looks like some kind of vec lowering bug when SIMD is not available on a
target?
>From gcc-bugs-return-607203-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 08:21:56 2018
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Subject: [Bug ipa/86124] [9 Regression] ICE in create_variable_info_for, at tree-ssa-structalias.c:6123
Date: Thu, 14 Jun 2018 08:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testing patch.
>From gcc-bugs-return-607204-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 08:34:32 2018
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Subject: [Bug target/86139] [7/8/9 Regression] ICE in in store_constructor, at expr.c:6849 on aarch64-linux-gnu and arm-linux-gnueabihf
Date: Thu, 14 Jun 2018 08:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is that build_word_mode_vector_type uses type_hash_canon on already
canonicalized input which is something it doesn't expect.
Testing trivial patch.
>From gcc-bugs-return-607205-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 08:38:16 2018
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Subject: [Bug c++/86118] Gcc segfault for big c++ data compilation
Date: Thu, 14 Jun 2018 08:38:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Thanks, now please attach output of --verbose. I need to investigate -march
options.
>From gcc-bugs-return-607206-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 09:02:21 2018
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Subject: [Bug tree-optimization/86144] New: GCC is not generating vector math calls to svml/acml functions
Date: Thu, 14 Jun 2018 09:02:00 -0000
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Bug ID: 86144
Summary: GCC is not generating vector math calls to svml/acml
functions
Product: gcc
Version: 8.1.1
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As per GCC 8.1.0 Manual
---snip--
-mveclibabi=type
Specifies the ABI type to use for vectorizing intrinsics using an external
library. Supported values for type are ‘svml’ for the Intel short vector math
library and ‘acml’ for the AMD math core library. To use this option, both
-ftree-vectorize and -funsafe-math-optimizations have to be enabled, and an
SVML or ACML ABI-compatible library must be specified at link time.
GCC currently emits calls to vmldExp2, vmldLn2, vmldLog102, vmldLog102,
vmldPow2, vmldTanh2, vmldTan2, vmldAtan2, vmldAtanh2, vmldCbrt2, vmldSinh2,
vmldSin2, vmldAsinh2, vmldAsin2, vmldCosh2, vmldCos2, vmldAcosh2, vmldAcos2,
vmlsExp4, vmlsLn4, vmlsLog104, vmlsLog104, vmlsPow4, vmlsTanh4, vmlsTan4,
vmlsAtan4, vmlsAtanh4, vmlsCbrt4, vmlsSinh4, vmlsSin4, vmlsAsinh4, vmlsAsin4,
vmlsCosh4, vmlsCos4, vmlsAcosh4 and vmlsAcos4 for corresponding function type
when -mveclibabi=svml is used, and __vrd2_sin, __vrd2_cos, __vrd2_exp,
__vrd2_log, __vrd2_log2, __vrd2_log10, __vrs4_sinf, __vrs4_cosf, __vrs4_expf,
__vrs4_logf, __vrs4_log2f, __vrs4_log10f and __vrs4_powf for the corresponding
function type when -mveclibabi=acml is used.
--snip--
#include <math.h>
double test_vect_exp (double* __restrict__ A, double* __restrict__ B, int size
)
{
int i;
for (i = 0; i < size; i++)
A[i] = exp(B[i]);
return A[0];
}
gcc-5.4.0/bin/gcc -O3 -mveclibabi=acml -ffast-math exp.c -S generated vector
math calls to amdlibm/intel svml.
---Snip---
L8:
movapd (%r12), %xmm0
addl $1, %r15d
addq $16, %r12
addq $16, %rbx
call __vrd2_exp
movups %xmm0, -16(%rbx)
cmpl %r15d, 4(%rsp)
ja .L8
movl 12(%rsp), %eax
addl %eax, %ebp
cmpl %eax, 8(%rsp)
je .L10
---Snip--
from gcc-6.0 we don't generate calls to acml/svml by default.
What we generate is a call to glibC vector math function (libmvec)
---Snip---
.L8:
movapd (%r12), %xmm0
addl $1, %r15d
addq $16, %r12
addq $16, %rbx
call _ZGVbN2v___exp_finite
movups %xmm0, -16(%rbx)
cmpl %r15d, 4(%rsp)
ja .L8
movl 12(%rsp), %eax
addl %eax, %ebp
cmpl %eax, 8(%rsp)
je .L10
---Snip---
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Subject: [Bug c++/86118] Gcc segfault for big c++ data compilation
Date: Thu, 14 Jun 2018 09:24:00 -0000
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--- Comment #6 from ÐлекÑандр Кроль <oleksandr.krol at gmail dot com> ---
command: /usr/local/bin/mpic++ --verbose --save-temps -DQT_CORE_LIB
-DQT_NO_DEBUG -isystem /usr/include/x86_64-linux-gnu/qt5 -isystem
/usr/include/x86_64-linux-gnu/qt5/QtCore -isystem
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -Wall -Wextra -std=c++11
-O2 -fPIC -fPIC -o ./idfs.cc.o -c ./idfs.cc
------------------------------------------------------------------------------
output: Using built-in specs.
COLLECT_GCC=g++
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
5.4.0-6ubuntu1~16.04.9' --with-bugurl=file:///usr/share/doc/gc\
c-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++
--prefix=/usr --program-suffix=-5 --enable-shared\
--enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --libdir=/usr/lib --enable-\
nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --with-default-libstdcxx-abi=n\
ew --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx
--enable-plugin --with-system-zlib --disable-browser-pl\
ugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--w\
ith-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64 --with-ar\
ch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with\
-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32
--enable-multilib --with-tune=generic --enable-checking=releas\
e --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.9)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-D' 'QT_CORE_LIB' '-D' 'QT_NO_DEBUG'
'-isystem' '/usr/include/x86_64-linux-gnu/qt5' '\
-isystem' '/usr/include/x86_64-linux-gnu/qt5/QtCore' '-isystem'
'/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64' '-Wall' \
'-Wextra' '-std=c++11' '-O2' '-fPIC' '-o' './idfs.cc.o' '-c' '-I'
'/usr/local/include' '-shared-libgcc' '-mtune=generic' '-ma\
rch=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -E -quiet -v -I /usr/local/include
-imultiarch x86_64-linux-gnu -D_GNU_SOURCE -D QT_\
CORE_LIB -D QT_NO_DEBUG -isystem /usr/include/x86_64-linux-gnu/qt5 -isystem
/usr/include/x86_64-linux-gnu/qt5/QtCore -isystem\
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 ./idfs.cc -mtune=generic
-march=x86-64 -std=c++11 -Wall -Wextra -fPIC -O2\
-fpch-preprocess -fstack-protector-strong -Wformat-security -o idfs.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/5"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/5/../../../../x86_64-linux-gnu/include"
ignoring duplicate directory "/usr/local/include"
as it is a non-system directory that duplicates a system directory
#include "..." search starts here:
#include <...> search starts here:
/usr/include/x86_64-linux-gnu/qt5
/usr/include/x86_64-linux-gnu/qt5/QtCore
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64
/usr/include/c++/5
/usr/include/x86_64-linux-gnu/c++/5
/usr/include/c++/5/backward
/usr/lib/gcc/x86_64-linux-gnu/5/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-D' 'QT_CORE_LIB' '-D' 'QT_NO_DEBUG'
'-isystem' '/usr/include/x86_64-linux-gnu/qt5' '\
-isystem' '/usr/include/x86_64-linux-gnu/qt5/QtCore' '-isystem'
'/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64' '-Wall' \
'-Wextra' '-std=c++11' '-O2' '-fPIC' '-o' './idfs.cc.o' '-c' '-I'
'/usr/local/include' '-shared-libgcc' '-mtune=generic' '-ma\
rch=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -fpreprocessed idfs.ii -quiet
-dumpbase idfs.cc -mtune=generic -march=x86-64 -auxbas\
e-strip ./idfs.cc.o -O2 -Wall -Wextra -std=c++11 -version -fPIC
-fstack-protector-strong -Wformat-security -o idfs.s
GNU C++11 (Ubuntu 5.4.0-6ubuntu1~16.04.9) version 5.4.0 20160609
(x86_64-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR version
3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++11 (Ubuntu 5.4.0-6ubuntu1~16.04.9) version 5.4.0 20160609
(x86_64-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR version
3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: d8217bc73be730fa402b500d5726a5b4
g++: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/83982] [6/7/8/9 Regression] Exception guarantee of C++14 vector::resize(size_type) is not met
Date: Thu, 14 Jun 2018 09:27:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Jun 14 09:26:51 2018
New Revision: 261585
URL: https://gcc.gnu.org/viewcvs?rev=261585&root=gcc&view=rev
Log:
PR libstdc++/83982 fix exception-safety guarantee of std::vector::resize
Construct new elements before moving existing ones, so that if a default
constructor throws, the existing elements are not left in a moved-from
state.
2018-06-14 Daniel Trebbien <dtrebbien@gmail.com>
Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/83982
* include/bits/vector.tcc (vector::_M_default_append(size_type)):
Default-construct new elements before moving existing ones.
* testsuite/23_containers/vector/capacity/resize/strong_guarantee.cc:
New.
Added:
trunk/libstdc++-v3/testsuite/23_containers/vector/capacity/resize/strong_guarantee.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/vector.tcc
>From gcc-bugs-return-607209-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 09:37:16 2018
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Subject: [Bug tree-optimization/86144] GCC is not generating vector math calls to svml/acml functions
Date: Thu, 14 Jun 2018 09:37:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC does what it is told to, unlike the -mveclibabi= options the calls to glibc
libmvec are arranged through source changes.
So, if you want to avoid that, you need to ask the glibc folks to provide some
macro to disable the <bits/math-vector.h> stuff and use that macro in addition
to -mveclibabi=.
>From gcc-bugs-return-607210-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 09:44:57 2018
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86145] New: Inefficient homogeneous struct return
Date: Thu, 14 Jun 2018 09:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86145
Bug ID: 86145
Summary: Inefficient homogeneous struct return
Product: gcc
Version: unknown
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GCC currently does a suboptimal job of returning structs.
Consider the testcases:
typedef struct { double x, y; } D2;
typedef struct { double x, y, a; } D3;
typedef struct { double x, y, a, b; } D4;
typedef struct { float x, y; } F2;
typedef struct { float x, y, a; } F3;
typedef struct { float x, y, a, b; } F4;
D2 f1(double x, double y)
{
D2 s = { x, y }; //this is actually optimal!
return s;
}
D2 f1a(D2 *p)
{
return p[2];
}
D3 f1b(D3 *p)
{
return p[2];
}
D4 f1c(D4 *p)
{
return p[1];
}
F2 f2(float x, float y)
{
F2 s = { x, y };
return s;
}
F2 f2a(F2 *p)
{
return p[3];
}
F3 f2b(F3 *p)
{
return p[4];
}
F4 f2c(F4 *p)
{
return p[1];
}
For aarch64 we generate:
f1:
ret
f1a:
ldp x1, x0, [x0, 32]
fmov d1, x0
fmov d0, x1
ret
f1b:
sub sp, sp, #64
ldr x0, [x0, 64]
str x0, [sp, 56]
ldp d0, d1, [sp, 40]
ldr d2, [sp, 56]
add sp, sp, 64
ret
f1c:
sub sp, sp, #64
ldp d0, d1, [sp, 32]
ldp d2, d3, [sp, 48]
add sp, sp, 64
ret
f2:
fmov x1, d0
mov x0, 0
bfi x0, x1, 0, 32
fmov x1, d1
bfi x0, x1, 32, 32
lsr x1, x0, 32
lsr w0, w0, 0
fmov s1, w1
fmov s0, w0
ret
f2a:
ldr x0, [x0, 24]
lsr x1, x0, 32
lsr w0, w0, 0
fmov s1, w1
fmov s0, w0
ret
f2b:
sub sp, sp, #32
ldr x1, [x0, 48]
ldr w0, [x0, 56]
str x1, [sp, 16]
str w0, [sp, 24]
ldp s0, s1, [sp, 16]
ldr s2, [sp, 24]
add sp, sp, 32
ret
f2c:
ldp x1, x0, [x0, 16]
lsr x3, x1, 32
lsr x2, x0, 32
fmov s1, w3
fmov s3, w2
lsr w1, w1, 0
lsr w0, w0, 0
fmov s0, w1
fmov s2, w0
ret
This also appears on x86:
f1:
ret
f1a:
movq 32(%rdi), %rdx
movq 40(%rdi), %rax
movq %rdx, -8(%rsp)
movsd -8(%rsp), %xmm0
movq %rax, -8(%rsp)
movsd -8(%rsp), %xmm1
ret
f1b:
movdqu 48(%rsi), %xmm0
movq 64(%rsi), %rdx
movq %rdi, %rax
movups %xmm0, (%rdi)
movq %rdx, 16(%rdi)
ret
f1c:
movdqu 32(%rsi), %xmm0
movdqu 48(%rsi), %xmm1
movq %rdi, %rax
movups %xmm0, (%rdi)
movups %xmm1, 16(%rdi)
ret
f2:
movd %xmm1, %eax
salq $32, %rax
movq %rax, %rdx
movd %xmm0, %eax
orq %rdx, %rax
movq %rax, -8(%rsp)
movq -8(%rsp), %xmm0
ret
f2a:
movq 24(%rdi), %rax
movq %rax, -8(%rsp)
movq -8(%rsp), %xmm0
ret
f2b:
movq 48(%rdi), %rax
movl 56(%rdi), %edx
movq %rax, -48(%rsp)
movq -48(%rsp), %xmm0
movl %edx, -12(%rsp)
movss -12(%rsp), %xmm1
ret
f2c:
movq 16(%rdi), %rdx
movq 24(%rdi), %rax
movq %rdx, -8(%rsp)
movq -8(%rsp), %xmm0
movq %rax, -8(%rsp)
movq -8(%rsp), %xmm1
ret
The compiler does the structure load as an opaque TImode (or wider) move and
then tries to unpack with subregs later on. Can we get the expander to expand
struct components more intelligently?
>From gcc-bugs-return-607211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 10:10:43 2018
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Subject: [Bug c++/86118] Gcc segfault for big c++ data compilation
Date: Thu, 14 Jun 2018 10:10:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
Ok, I can see the ICE, but GCC 5.4.0 is out of support. Please try a newer
version. If you see it again, please reopen the issue.
>From gcc-bugs-return-607212-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 10:13:44 2018
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Subject: [Bug libgomp/86146] New: OpenMP not seeing more than 64 cores on Windows
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86146
Bug ID: 86146
Summary: OpenMP not seeing more than 64 cores on Windows
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgomp
Assignee: unassigned at gcc dot gnu.org
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CC: jakub at gcc dot gnu.org
Target Milestone: ---
Created attachment 44273
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44273&action=edit
Support Systems That Have More Than 64 Processors
Libgomp can't see more than 64 processors on Windows. Sample program:
#include <stdio.h>
#include <omp.h>
int main(void) {
printf("number of CPUs: %d\n", omp_get_num_procs());
return 0;
}
command line:
gcc -fopenmp -test_cpu.c -o test_cpu
This is relevant for dual CPU systems which have more than 64 logical
processors total. I've looked into libgomp implementation, proc.c file contains
this:
static unsigned int
count_avail_process_cpus ()
{
DWORD_PTR process_cpus;
DWORD_PTR system_cpus;
if (GetProcessAffinityMask (GetCurrentProcess (),
&process_cpus, &system_cpus))
{
unsigned int count;
for (count = 0; process_cpus != 0; process_cpus >>= 1)
if (process_cpus & 1)
count++;
return count;
}
return 1;
}
This is sadly incorrect way to count CPUs on Windows. As GetProcessAffinityMask
gets mask only for current processor group not all CPUs on the system.
See:
https://blogs.technet.microsoft.com/hardtofind/2018/01/29/windows-server-with-more-than-64-logical-processors/
https://msdn.microsoft.com/en-us/library/dd405527(VS.85).aspx
(also see attachment which contains explanation from Microsoft)
Clang 5.0.2 does counting correctly. It's done in kmp_affinity.cpp in Clang
source. Function:
void __kmp_affinity_entire_machine_mask(kmp_affin_mask_t *mask)
Sadly it seems omp is no longer included in Clang for Windows in 6.0.
I have no experience working on gcc or openmp. I am unable to diagnose how many
other functions need to be re-written to support more than 64 CPUs.
>From gcc-bugs-return-607213-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 10:18:13 2018
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Subject: [Bug libgomp/86146] OpenMP not seeing more than 64 cores on Windows
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--- Comment #1 from karolina1980 at realemail dot net ---
Of course it's not only about counting CPUs. They can't be used by the
application either.
>From gcc-bugs-return-607214-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 10:23:33 2018
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Subject: [Bug libgomp/86146] OpenMP not seeing more than 64 cores on Windows
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dannysmith at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
CCing author of mingw32/proc.c.
>From gcc-bugs-return-607215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 10:39:02 2018
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Subject: [Bug c++/82882] [8 regression] ICE Segmentation fault
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82882
--- Comment #9 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
The Qt problems are not fixed, this comes with the gcc-8 branch:
qtbase/include/QtCore/../../../../qtbase/src/corelib/tools/qstringliteral.h:82:30:
internal compiler error: Segmentation fault
([]() Q_DECL_NOEXCEPT -> QString { \
^~~~~~~
rep_model_merged.h:325:62: note: in expansion of macro ‘QStringLiteral’
MediaSourceAPI(ObjectType *object, const QString &name =
QStringLiteral("Media"))
^~~~~~~~~~~~~~
0xb6a1ff crash_signal
../../gcc/toplev.c:325
0x6e5e40 most_general_template(tree_node*)
../../gcc/cp/pt.c:22837
0x6e60fe enclosing_instantiation_of
../../gcc/cp/pt.c:13274
0x6fc0aa tsubst_function_decl
../../gcc/cp/pt.c:12824
0x6f6e5e tsubst_decl
../../gcc/cp/pt.c:13308
0x6f0ce7 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/cp/pt.c:14196
0x6fa6d4 lookup_template_class_1
../../gcc/cp/pt.c:9373
0x6fa6d4 lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
../../gcc/cp/pt.c:9650
0x6fb45d tsubst_aggr_type
../../gcc/cp/pt.c:12649
0x6f0812 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/cp/pt.c:14278
0x6f7190 tsubst_decl
../../gcc/cp/pt.c:13575
0x6f0ce7 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/cp/pt.c:14196
0x6f502b tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/cp/pt.c:16677
0x6f4418 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/cp/pt.c:16600
0x6f3ccb tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/cp/pt.c:16897
0x6f3ccb tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/cp/pt.c:16897
0x703fa8 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/cp/pt.c:16585
0x703fa8 tsubst_lambda_expr(tree_node*, tree_node*, int, tree_node*)
../../gcc/cp/pt.c:17648
0x70142f tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc/cp/pt.c:18938
0x701a36 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc/cp/pt.c:18260
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.
Makefile:1777: recipe for target '.obj/tst_modelreplicatest.o' failed
make[3]: *** [.obj/tst_modelreplicatest.o] Error 1
make[3]: Leaving directory
'/home/vivoutil/kuutti/qtremoteobjects/tests/auto/modelreplica'
Makefile:107: recipe for target 'sub-modelreplica-make_first' failed
make[2]: *** [sub-modelreplica-make_first] Error 2
make[2]: Leaving directory '/home/vivoutil/kuutti/qtremoteobjects/tests/auto'
Makefile:44: recipe for target 'sub-auto-make_first' failed
make[1]: *** [sub-auto-make_first] Error 2
make[1]: Leaving directory '/home/vivoutil/kuutti/qtremoteobjects/tests'
Makefile:125: recipe for target 'sub-tests-make_first' failed
make: *** [sub-tests-make_first] Error 2
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Subject: [Bug c++/86118] Gcc segfault for big c++ data compilation
Date: Thu, 14 Jun 2018 10:41:00 -0000
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--- Comment #8 from ÐлекÑандр Кроль <oleksandr.krol at gmail dot com> ---
Thank you. however I have not got the point of providing additional
information. I specified gcc version initially.
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Subject: [Bug driver/86030] specs file processing does not create response files for input directories
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Tamar Christina <tnfchris at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Fixed by https://gcc.gnu.org/ml/gcc-patches/2018-04/msg01172.html and r261474.
Thanks Eric.
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Subject: [Bug c++/82882] [8 regression] ICE Segmentation fault
Date: Thu, 14 Jun 2018 10:54:00 -0000
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--- Comment #10 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Reproducer:
template<typename = int>
void f(const char* a =
([]() noexcept -> const char* {
enum { Size = 42 - 1 };
return "";
}()));
void g()
{
f();
}
Looks like we don't handle lambda invocation as a default argument of a
function parameter of a function template.
>From gcc-bugs-return-607219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 10:55:37 2018
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Subject: [Bug ipa/86124] [9 Regression] ICE in create_variable_info_for, at tree-ssa-structalias.c:6123
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 14 10:55:00 2018
New Revision: 261587
URL: https://gcc.gnu.org/viewcvs?rev=261587&root=gcc&view=rev
Log:
2018-06-14 Richard Biener <rguenther@suse.de>
PR ipa/86124
* tree-ssa-struct-alias.c (create_variable_info_for): Handle
NULL cgraph_node.
* gcc.dg/pr86124.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr86124.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-structalias.c
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Subject: [Bug target/86139] [7/8/9 Regression] ICE in in store_constructor, at expr.c:6849 on aarch64-linux-gnu and arm-linux-gnueabihf
Date: Thu, 14 Jun 2018 10:56:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 14 10:55:31 2018
New Revision: 261588
URL: https://gcc.gnu.org/viewcvs?rev=261588&root=gcc&view=rev
Log:
2018-06-14 Richard Biener <rguenther@suse.de>
PR middle-end/86139
* tree-vect-generic.c (build_word_mode_vector_type): Remove
duplicate and harmful type_hash_canon.
* tree.c (type_hash_canon): Assert we didn't find ourselves.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-vect-generic.c
trunk/gcc/tree.c
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Subject: [Bug c++/82882] [8 regression] ICE Segmentation fault
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--- Comment #11 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Also happens with a member function of a class template, thus:
template<typename = int>
struct X {
void f(const char* a =
([]() noexcept -> const char* {
enum { Size = 42 - 1 };
return "";
}()));
};
void g()
{
X<int>().f();
}
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Subject: [Bug c++/86147] New: Lambda is capturing a non-ODR-used constexpr
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Bug ID: 86147
Summary: Lambda is capturing a non-ODR-used constexpr
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
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Minimal example:
#include<array>
struct A { static constexpr size_t value = 0; };
template<class C>
void foo() {
constexpr size_t N = C::value;
auto f = [&]{ std::array<int, N> a; };
};
int main() {
foo<A>();
return 0;
}
On gcc 8.0.1 and 8.1.1 (built from the latest revision on SVN), this code
produces an error:
error: use of ‘this’ in a constant expression
auto f = [&]{ std::array<int, N> a; };
^
Apparently N is captured despite it not being ODR-used, leading to the error.
The error is not reported on gcc 7, and it strangely disappears if C::value is
replaced with a literal.
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From: "karl.may0 at freenet dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86148] New: parameterized type compile time error
Date: Thu, 14 Jun 2018 11:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86148
Bug ID: 86148
Summary: parameterized type compile time error
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: karl.may0 at freenet dot de
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This does not compile:
Module AA
Type, abstract :: parent(k)
Integer, kind :: k
Real(k) :: b
End type parent
Type, extends(parent) :: child
contains
Procedure, Pass :: A1 => SubA1
end type child
Interface
Module Subroutine SubA1(this)
Class(child(8)), Intent(In) :: this
end Subroutine
End Interface
end Module AA
SubModule(AA) xx
contains
Module Procedure SubA1
End procedure
End SubModule xx
gfortran stops with
Procedure, Pass :: A1 => SubA1
1
Error: Argument ‘this’ of ‘suba1’ with PASS(this) at (1) must be of the
derived-type ‘child’
f951: Fatal Error: Module file ‘aa.smod’ has not been generated, either because
the module does not contain a MODULE PROCEDURE or there is an error in the
module.
compilation terminated.
Compiles with ifort 17.07 and 18.03
>From gcc-bugs-return-607224-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 11:35:58 2018
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From: "karl.may0 at freenet dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/86149] New: generic binding in derived types
Date: Thu, 14 Jun 2018 11:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86149
Bug ID: 86149
Summary: generic binding in derived types
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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According to the last post in this thread
https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/779807
this code should not compile but it does
Module Mod_Test
Implicit None
Private
Type, Public :: test
contains
Generic :: Get => GetA,GetB
Procedure, PAss :: GetA => SubGetA
Procedure, PAss :: GetB => SubGetB
End type test
contains
Subroutine SubGetA(this,iin)
Implicit None
Class(test), Intent(InOut) :: this
Integer(kind=8), Intent(In), Pointer :: iin
write(*,*) "a"
End Subroutine SubGetA
Subroutine SubGetB(this,iin)
Implicit None
Class(test), Intent(InOut) :: this
integer(kind=8), Intent(InOut), allocatable :: iin
write(*,*) "b"
End Subroutine SubGetB
End Module Mod_Test
Program AA
use Mod_Test, only: Test
Type(Test) :: x
integer(kind=8), pointer :: c
integer(kind=8), allocatable :: d
call x%get(c)
call x%get(d)
end Program AA
>From gcc-bugs-return-607225-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 11:58:45 2018
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81084] [8 Regression] powerpcspe port full of confusing configury / command-line options not related to SPE
Date: Thu, 14 Jun 2018 11:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81084
--- Comment #60 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
Ping?
>From gcc-bugs-return-607226-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 12:17:17 2018
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From: "mcccs at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86150] New: Trunk Segmentation Fault
Date: Thu, 14 Jun 2018 12:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86150
Bug ID: 86150
Summary: Trunk Segmentation Fault
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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This has been happening since ~5 days ago.
-v output:
Using built-in specs.
COLLECT_GCC=/opt/compiler-explorer/gcc-snapshot/bin/g++
COLLECT_LTO_WRAPPER=/opt/compiler-explorer/gcc-trunk-20180611/bin/../libexec/gcc/x86_64-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../gcc-trunk-20180611/configure
--prefix=/opt/compiler-explorer/gcc-build/staging --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu --disable-bootstrap
--enable-multiarch --with-abi=m64 --with-multilib-list=m32,m64,mx32
--enable-multilib --enable-clocale=gnu --enable-languages=c,c++,fortran
--enable-ld=yes --enable-gold=yes --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-linker-build-id --enable-lto
--enable-plugins --enable-threads=posix --with-pkgversion=GCC-Explorer-Build
Thread model: posix
gcc version 9.0.0 20180610 (experimental) (GCC-Explorer-Build)
COLLECT_GCC_OPTIONS='-g' '-o'
'/tmp/compiler-explorer-compiler118514-54-ka0j7a.n4wma/output.s' '-Wall' '-v'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
/opt/compiler-explorer/gcc-trunk-20180611/bin/../libexec/gcc/x86_64-linux-gnu/9.0.0/cc1plus
-quiet -v -imultiarch x86_64-linux-gnu -iprefix
/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/x86_64-linux-gnu/9.0.0/
-D_GNU_SOURCE <source> -quiet -dumpbase example.cpp -mtune=generic
-march=x86-64 -auxbase example -g -Wall -version -o /tmp/cclN2skN.s
GNU C++14 (GCC-Explorer-Build) version 9.0.0 20180610 (experimental)
(x86_64-linux-gnu)
compiled by GNU C version 7.3.0, GMP version 6.1.0, MPFR version 3.1.4,
MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
ignoring nonexistent directory
"/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/x86_64-linux-gnu/9.0.0/../../../../x86_64-linux-gnu/include"
ignoring duplicate directory
"/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.0.0/../../../../include/c++/9.0.0"
ignoring duplicate directory
"/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.0.0/../../../../include/c++/9.0.0/x86_64-linux-gnu"
ignoring duplicate directory
"/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.0.0/../../../../include/c++/9.0.0/backward"
ignoring duplicate directory
"/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.0.0/include"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring duplicate directory
"/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.0.0/include-fixed"
ignoring nonexistent directory
"/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.0.0/../../../../x86_64-linux-gnu/include"
ignoring duplicate directory "/usr/include/x86_64-linux-gnu"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/x86_64-linux-gnu
/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/x86_64-linux-gnu/9.0.0/../../../../include/c++/9.0.0
/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/x86_64-linux-gnu/9.0.0/../../../../include/c++/9.0.0/x86_64-linux-gnu
/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/x86_64-linux-gnu/9.0.0/../../../../include/c++/9.0.0/backward
/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/x86_64-linux-gnu/9.0.0/include
/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/x86_64-linux-gnu/9.0.0/include-fixed
/usr/local/include
/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/../../include
/usr/include
End of search list.
GNU C++14 (GCC-Explorer-Build) version 9.0.0 20180610 (experimental)
(x86_64-linux-gnu)
compiled by GNU C version 7.3.0, GMP version 6.1.0, MPFR version 3.1.4,
MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: ee1f9e5f6ad5942fe2c52b4ffb2106ba
COLLECT_GCC_OPTIONS='-g' '-o'
'/tmp/compiler-explorer-compiler118514-54-ka0j7a.n4wma/output.s' '-Wall' '-v'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
/opt/compiler-explorer/gcc-trunk-20180611/bin/../lib/gcc/x86_64-linux-gnu/9.0.0/../../../../x86_64-linux-gnu/bin/as
-v --64 -o /tmp/ccQCpaIE.o /tmp/cclN2skN.s
g++: internal compiler error: Segmentation fault signal terminated program as
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 4
The compiled code: Any valid C file, including a completely blank file and `int
main(void) {return 0;}`
>From gcc-bugs-return-607228-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 12:31:56 2018
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Subject: [Bug ipa/85960] -fipa-pta and ifunc are incompatible
Date: Thu, 14 Jun 2018 12:31:00 -0000
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Bug 85960 depends on bug 86124, which changed state.
Bug 86124 Summary: [9 Regression] ICE in create_variable_info_for, at tree-ssa-structalias.c:6123
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86124
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-607227-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 12:31:55 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/86124] [9 Regression] ICE in create_variable_info_for, at tree-ssa-structalias.c:6123
Date: Thu, 14 Jun 2018 12:31:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 12:32:23 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86139] [7/8/9 Regression] ICE in in store_constructor, at expr.c:6849 on aarch64-linux-gnu and arm-linux-gnueabihf
Date: Thu, 14 Jun 2018 12:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86139
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 14 12:31:46 2018
New Revision: 261591
URL: https://gcc.gnu.org/viewcvs?rev=261591&root=gcc&view=rev
Log:
2018-06-14 Richard Biener <rguenther@suse.de>
PR middle-end/86139
* tree-vect-generic.c (build_word_mode_vector_type): Remove
duplicate and harmful type_hash_canon.
* tree.c (type_hash_canon): Assert we didn't find ourselves.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/tree-vect-generic.c
branches/gcc-8-branch/gcc/tree.c
>From gcc-bugs-return-607230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 12:35:29 2018
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Subject: [Bug c/86150] Trunk Segmentation Fault
Date: Thu, 14 Jun 2018 12:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86150
Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |amonakov at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
This is the *assembler* segfaulting, not the *compiler*. The assembly produced
by trunk is not different from gcc-8 output on empty input, so it's probably
some weird issue with Binutils installation for gcc-trunk worker(s) on Godbolt
side.
>From gcc-bugs-return-607231-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 12:41:31 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/86090] [ASAN] ASAN does not properly configure libbacktrace.
Date: Thu, 14 Jun 2018 12:41:00 -0000
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Denis Khalikov <d.khalikov at partner dot samsung.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #4 from Denis Khalikov <d.khalikov at partner dot samsung.com> ---
Fixed on trunk.
>From gcc-bugs-return-607232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 12:43:07 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 target/86139] [7 Regression] ICE in in store_constructor, at expr.c:6849 on aarch64-linux-gnu and arm-linux-gnueabihf
Date: Thu, 14 Jun 2018 12:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86139
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.1.1, 9.0
Summary|[7/8/9 Regression] ICE in |[7 Regression] ICE in in
|in store_constructor, at |store_constructor, at
|expr.c:6849 on |expr.c:6849 on
|aarch64-linux-gnu and |aarch64-linux-gnu and
|arm-linux-gnueabihf |arm-linux-gnueabihf
Known to fail|8.1.1, 9.0 |8.1.0
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk/8 sofar.
>From gcc-bugs-return-607233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 12:44:50 2018
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From: "rbramley at letterboxes dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/86151] New: size() of unallocated array is nonzero
Date: Thu, 14 Jun 2018 12:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86151
Bug ID: 86151
Summary: size() of unallocated array is nonzero
Product: gcc
Version: 8.0.1
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Priority: P3
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Created attachment 44274
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44274&action=edit
version of code sizetest.f90
In the following program, gfortran 8.0.1 shows the size of an unallocated array
as being 1 in both dimensions, but a correct shape of [0 0]:
program sizetest
use iso_fortran_env, only: real8 => real64, stdout => output_unit
implicit none
integer, parameter:: n = 3, m = 4
real(real8), allocatable :: x(:,:)
real(real8), allocatable :: z(:,:)
allocate(x(m,n))
write(stdout,*) '==================================='
write(stdout,*) 'Allocated 2D array x: '
write(stdout,*) 'shape(x) = ', shape(x)
write(stdout,*) 'size(x) = ', size(x)
write(stdout,*) 'size(x,1) = ', size(x,1)
write(stdout,*) 'size(x,2) = ', size(x,2)
write(stdout,*) '==================================='
write(stdout,*) 'Unallocated 2D array z: '
write(stdout,*) 'shape(z) = ', shape(z)
write(stdout,*) 'size(z) = ', size(z)
write(stdout,*) 'size(z,1) = ', size(z,1)
write(stdout,*) 'size(z,2) = ', size(z,2)
end program sizetest
(I've also put the code as an attachment in case it's easier for you to extract
that way, versus using cut and paste.)
The output using gfortran with default options is:
===================================
Allocated 2D array x:
shape(x) = 4 3
size(x) = 12
size(x,1) = 4
size(x,2) = 3
===================================
Unallocated 2D array z:
shape(z) = 0 0
size(z) = 1
size(z,1) = 1
size(z,2) = 1
For the array x, all is as expected. For z, however, I expected all three
size() inquiries to yield 0. Intel fortran returns zeros for those. It's not
clear to me if the size of an unallocated array is specified by the Fortran
standard, or is in the category of "just don't do that".
Irrelevant addendum: I really appreciate the years of hard work and effort the
gfortran team has put into the project. And the patience you've show for fools
and noobs with dumb questions, a category this report may end up falling into.
In any case, thank you for creating a tool of great use to many people.
>From gcc-bugs-return-607234-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 13:03:30 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86076] [7/8/9 Regression] ICE: verify_gimple failed (error: location references block not in block tree)
Date: Thu, 14 Jun 2018 13:03:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
I have a patch.
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index 5f6defa6fe7..e7d16ca0a14 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -6742,7 +6742,16 @@ move_stmt_op (tree *tp, int *walk_subtrees, void *data)
;
else if (block == p->orig_block
|| p->orig_block == NULL_TREE)
- TREE_SET_BLOCK (t, p->new_block);
+ {
+ /* tree_node_can_be_shared says we can share invariant
+ addresses but unshare_expr copies them anyways. Make sure
+ to unshare before adjusting the block in place - we do not
+ always see a copy here. */
+ if (TREE_CODE (t) == ADDR_EXPR
+ && is_gimple_min_invariant (t))
+ *tp = t = unshare_expr (t);
+ TREE_SET_BLOCK (t, p->new_block);
+ }
else if (flag_checking)
{
while (block && TREE_CODE (block) == BLOCK && block != p->orig_block)
>From gcc-bugs-return-607235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 13:12:09 2018
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Subject: [Bug tree-optimization/86144] GCC is not generating vector math calls to svml/acml functions
Date: Thu, 14 Jun 2018 13:12:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-14
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note a workaround would be to re-arrange the vectorizer calls to
vectorizable_simd_clone_call and vectorizable_call. Can you check if
the following works? It gives precedence to what the target hook
(and thus -mveclibabi) provides.
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index 9f365e31e49..bdef56bf65e 100644
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -9543,13 +9543,13 @@ vect_analyze_stmt (gimple *stmt, bool
*need_to_vectorize, slp_tree node,
if (!bb_vinfo
&& (STMT_VINFO_RELEVANT_P (stmt_info)
|| STMT_VINFO_DEF_TYPE (stmt_info) == vect_reduction_def))
- ok = (vectorizable_simd_clone_call (stmt, NULL, NULL, node, cost_vec)
+ ok = (vectorizable_call (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_conversion (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_shift (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_operation (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_assignment (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_load (stmt, NULL, NULL, node, node_instance,
cost_vec)
- || vectorizable_call (stmt, NULL, NULL, node, cost_vec)
+ || vectorizable_simd_clone_call (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_store (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_reduction (stmt, NULL, NULL, node, node_instance,
cost_vec)
@@ -9559,14 +9559,14 @@ vect_analyze_stmt (gimple *stmt, bool
*need_to_vectorize, slp_tree node,
else
{
if (bb_vinfo)
- ok = (vectorizable_simd_clone_call (stmt, NULL, NULL, node, cost_vec)
+ ok = (vectorizable_call (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_conversion (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_shift (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_operation (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_assignment (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_load (stmt, NULL, NULL, node, node_instance,
cost_vec)
- || vectorizable_call (stmt, NULL, NULL, node, cost_vec)
+ || vectorizable_simd_clone_call (stmt, NULL, NULL, node,
cost_vec)
|| vectorizable_store (stmt, NULL, NULL, node, cost_vec)
|| vectorizable_condition (stmt, NULL, NULL, NULL, 0, node,
cost_vec)
>From gcc-bugs-return-607236-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 13:15:00 2018
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Subject: [Bug middle-end/86145] Inefficient homogeneous struct return
Date: Thu, 14 Jun 2018 13:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |8.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is that the ABI details are not exposed soon enough and thus
decisions on where to allocate locals are already committed to.
There are a bunch of dups for x86 returns/args of vectors and complex vars.
>From gcc-bugs-return-607237-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 13:16:21 2018
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Subject: [Bug c++/86147] [8/9 Regression] Lambda is capturing a non-ODR-used constexpr
Date: Thu, 14 Jun 2018 13:16:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Target Milestone|--- |8.2
Summary|Lambda is capturing a |[8/9 Regression] Lambda is
|non-ODR-used constexpr |capturing a non-ODR-used
| |constexpr
>From gcc-bugs-return-607239-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 13:35:43 2018
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Subject: [Bug target/85945] [6/7/8/9 Regression] ICE in resolve_subreg_use, at lower-subreg.c:751
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jun 14 13:35:06 2018
New Revision: 261593
URL: https://gcc.gnu.org/viewcvs?rev=261593&root=gcc&view=rev
Log:
PR target/85945
* lower-subreg.c (find_decomposable_subregs): Don't decompose float
subregs of multi-word pseudos unless the float mode has word size.
* gcc.c-torture/compile/pr85945.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr85945.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lower-subreg.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-607238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 13:35:09 2018
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/86151] size() of unallocated array is nonzero
Date: Thu, 14 Jun 2018 13:35:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-06-14
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
IMO this PR should be closed as INVALID: any use of unallocated allocatable
outside the intrinsic ALLOCATED is invalid.
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Subject: [Bug lto/86080] Using FLTO ends up in huge package size (jansson zeromq zlib)
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--- Comment #7 from Balazs Vinarz <vinibali1 at gmail dot com> ---
Thank you Richard
>From gcc-bugs-return-607240-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 13:37:22 2018
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Subject: [Bug target/85945] [6/7/8/9 Regression] ICE in resolve_subreg_use, at lower-subreg.c:751
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jun 14 13:36:43 2018
New Revision: 261594
URL: https://gcc.gnu.org/viewcvs?rev=261594&root=gcc&view=rev
Log:
PR target/85945
* lower-subreg.c (find_decomposable_subregs): Don't decompose float
subregs of multi-word pseudos unless the float mode has word size.
* gcc.c-torture/compile/pr85945.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.c-torture/compile/pr85945.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/lower-subreg.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-607242-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 13:54:45 2018
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Subject: [Bug middle-end/86122] [8/9 Regression] ICE in useless_type_conversion_p, at gimple-expr.c:87
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r249447. I'd go for:
--- match.pd.jj1 2018-05-25 14:34:42.268381974 +0200
+++ match.pd 2018-06-14 15:53:20.538712014 +0200
@@ -1771,10 +1771,11 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
(neg_inner_op @0 { wide_int_to_tree (type, wi::to_wide (cst)); })
/* Last resort, use some unsigned type. */
(with { tree utype = unsigned_type_for (type); }
- (view_convert (inner_op
- (view_convert:utype @0)
- (view_convert:utype
- { drop_tree_overflow (cst); })))))))))))))
+ (if (utype)
+ (view_convert (inner_op
+ (view_convert:utype @0)
+ (view_convert:utype
+ { drop_tree_overflow (cst); }))))))))))))))
/* (CST1 - A) +- CST2 -> CST3 - A */
(for outer_op (plus minus)
so that it is easily backportable and then we can discuss if we want
unsigned_type_for to support complex integer types or not.
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Subject: [Bug middle-end/86122] [8/9 Regression] ICE in useless_type_conversion_p, at gimple-expr.c:87
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Note, other uses of unsigned_type_for in match.pd seems to be guarded with
INTEGRAL_TYPE_P check or are on expressions that can't appear with complex
operands.
>From gcc-bugs-return-607244-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 13:59:30 2018
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Subject: [Bug middle-end/86122] [8/9 Regression] ICE in useless_type_conversion_p, at gimple-expr.c:87
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 14 Jun 2018, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86122
>
> --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Note, other uses of unsigned_type_for in match.pd seems to be guarded with
> INTEGRAL_TYPE_P check or are on expressions that can't appear with complex
> operands.
A patch along that line or your previously posted patch is OK.
>From gcc-bugs-return-607245-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 14:05:14 2018
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Subject: [Bug middle-end/86122] [8/9 Regression] ICE in useless_type_conversion_p, at gimple-expr.c:87
Date: Thu, 14 Jun 2018 14:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86122
--- Comment #5 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> if we want unsigned_type_for to support complex integer types or not.
I think we do (seems super easy). Testing utype can't hurt indeed.
(In reply to Jakub Jelinek from comment #3)
> Note, other uses of unsigned_type_for in match.pd seems to be guarded with
> INTEGRAL_TYPE_P check or are on expressions that can't appear with complex
> operands.
This transform is specifically written in a way that works for vectors (and
should work with complex if unsigned_type_for was extended), it would be sad to
disable it.
>From gcc-bugs-return-607246-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 14:25:50 2018
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From: "terra at gnome dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug demangler/86152] New: Failure to demange clone names with digits
Date: Thu, 14 Jun 2018 14:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86152
Bug ID: 86152
Summary: Failure to demange clone names with digits
Product: gcc
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See https://sourceware.org/bugzilla/show_bug.cgi?id=23283
which is the same issue filed for gdb.
There is a patch over there too.
The demangler fails to demangle the symbol names that gcc generates
when using, e.g., __attribute__((target("avx2"))). The trigger of
the problem is the digit.
welinder@dicentra:~> echo _Z3foov.avx2 | c++filt
_Z3foov.avx2
welinder@dicentra:~> echo _Z3foov.avx | c++filt
foo() [clone .avx]
welinder@dicentra:~> echo _Z3foov.mooooo | c++filt
foo() [clone .mooooo]
welinder@dicentra:~> echo _Z3foov.mooooo2 | c++filt
_Z3foov.mooooo2
Sample code that triggers the problem is below. Only the default and avx
versions are demangled correctly. This affects breakpoints in gdb.
__attribute__((target("default"))) inline int foo() { return 0; }
__attribute__((target("sse2"))) inline int foo() { return 1; }
__attribute__((target("avx"))) inline int foo() { return 2; }
__attribute__((target("avx2"))) inline int foo() { return 3; }
__attribute__((target("avx512f"))) inline int foo() { return 4; }
>From gcc-bugs-return-607247-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 14:41:13 2018
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Subject: [Bug other/86153] New: [9 regression] test case g++.dg/pr83239.C fails starting with r261585
Date: Thu, 14 Jun 2018 14:41:00 -0000
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Bug ID: 86153
Summary: [9 regression] test case g++.dg/pr83239.C fails
starting with r261585
Product: gcc
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make -k check-gcc RUNTESTFLAGS=dg.exp=g++.dg/pr83239.C
. . .
# of expected passes 7
# of unexpected failures 2
FAIL: g++.dg/pr83239.C -std=gnu++11 scan-tree-dump-not optimized
"_ZNSt6vectorIiSaIiEE17_M_default_appendEm"
FAIL: g++.dg/pr83239.C -std=gnu++14 scan-tree-dump-not optimized
"_ZNSt6vectorIiSaIiEE17_M_default_appendEm"
The revision changed the trees a bit and those checks now fail. If this is
working as expected the test cases need to be updated.
r261585 | redi | 2018-06-14 04:26:51 -0500 (Thu, 14 Jun 2018) | 14 lines
PR libstdc++/83982 fix exception-safety guarantee of std::vector::resize
Construct new elements before moving existing ones, so that if a default
constructor throws, the existing elements are not left in a moved-from
state.
2018-06-14 Daniel Trebbien <dtrebbien@gmail.com>
Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/83982
* include/bits/vector.tcc (vector::_M_default_append(size_type)):
Default-construct new elements before moving existing ones.
* testsuite/23_containers/vector/capacity/resize/strong_guarantee.cc:
New.
>From gcc-bugs-return-607248-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 14:44:05 2018
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Subject: [Bug middle-end/83239] False positive from -Wstringop-overflow on simple std::vector code
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--- Comment #22 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The new trunk/gcc/testsuite/g++.dg/pr83239.C test has started failing, due to a
change I made to std::vector, see PR 86153
>From gcc-bugs-return-607249-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 14:47:11 2018
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Subject: [Bug other/86153] [9 regression] test case g++.dg/pr83239.C fails starting with r261585
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It seems unfortunate that _M_default_append is no longer inlined, but the
function was incorrect and had to be changed.
I don't know enough about the failing test to know what can or should be done
to fix it.
>From gcc-bugs-return-607250-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 15:17:54 2018
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Subject: [Bug rtl-optimization/63281] powerpc64le creates 64 bit constants from scratch instead of loading them
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--- Comment #9 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Also reported by Donald Stence this week:
The compiler produces excessive sequences to synthesize some literal constants.
This contributes excess path length and potentially latency.
Constants requiring only 2 or 3 instructions is acceptable. More than 3 should
be optimized via a load from the GOT (i.e., data in GOT).
Compile test case either -O or -O3, default processor (AT-11.0-0).
Example constant from perlbench: 0x000800004100001.
Resulting sequence:
li 3,0
ori 3,3,0x8000
sldi 3,3,32
oris 3,3,0x410
ori 3,3,0x1
It was ~20% faster on the block of some 30 instructions prior to the switch in
the top function of perlbench (S_regmatch). That section of code contained two
longer sequences (one 4, the other 5 instructions - with the 5 one capable of
being done in 4 - as [Segher] pointed out), with the rest being 1 or 2
instruction constant synthesization or addi and a out-of-bounds check for the
switch. I replaced the two longer ones with ld off r2 to get the ~20%. Of
course this is in isolation, but I believe this to be sound.
>From gcc-bugs-return-607251-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 16:19:30 2018
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Subject: [Bug fortran/86149] generic binding in derived types
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-06-14
CC| |janus at gcc dot gnu.org
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The code compile up to revision r261447, but gives the error starting at
r261448.
I let Janus decide if it is the intended behavior (and why) or this is a
regression.
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Subject: [Bug fortran/86148] parameterized type compile time error
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82173
[Bug 82173] [meta-bug] Parameterized derived type errors
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From: "rebel at ameritech dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/86155] New: std::thread
Date: Thu, 14 Jun 2018 17:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86155
Bug ID: 86155
Summary: std::thread
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: rebel at ameritech dot net
Target Milestone: ---
Successful Compiler Build:
mingw-w64-v5.0.4:
../src/mingw-w64-libraries/winpthreads/configure --build=x86_64-w64-mingw32
--host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32
--prefix=/c/temp/gcc/dest/x86_64-w64-mingw32
--with-sysroot=/c/temp/gcc/dest/x86_64-w64-mingw32 --disable-shared
make -j4 -O all "CFLAGS=-s -O3"
../src/configure --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32
--target=x86_64-w64-mingw32 --disable-lib32
--prefix=/c/temp/gcc/dest/x86_64-w64-mingw32
--with-sysroot=/c/temp/gcc/dest/x86_64-w64-mingw32 --enable-wildcard
make -j4 -O all "CFLAGS=-s -O3"
gcc 8.1.0:
../src/configure --enable-languages=c,c++ --build=x86_64-w64-mingw32
--host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --disable-multilib
--prefix=/c/temp/gcc/dest --with-sysroot=/c/temp/gcc/dest
--disable-libstdcxx-pch --disable-libstdcxx-verbose --disable-nls
--disable-shared --disable-win32-registry --with-arch=native
--enable-threads=posix --enable-libgomp
make -j4 -O S bootstrap "CFLAGS=-g0 -O3" "CXXFLAGS=-g0 -O3"
"CFLAGS_FOR_TARGET=-g0 -O3" "CXXFLAGS_FOR_TARGET=-g0 -O3" "BOOT_CFLAGS=-g0 -O3"
"BOOT_CXXFLAGS=-g0 -O3"
Windows 10 (sandybridge CPU) Mutli-threaded C++ program compiles with GCC8.1.1
but crashes with a segmentation fault.
Same program compiles and runs successfully with GCC7.3 and with gcc version
8.1.0 (x86_64-posix-seh-rev0, Built by MinGW-W64 project)
test program source code:
#include <iostream>
#include <windows.h>
#include <thread>
#include <chrono>
void function_1()
{
for (int i = 0; i != 4; i++)
{
std::cout << "Function 1 i = "
<< i << std::endl;
std::chrono::milliseconds(1000);
}
}
void function_2()
{
for (int j = 0; j != 4; j++)
{
std::cout << " Function 2 j = "
<< j << std::endl;
std::chrono::milliseconds(500);
}
}
int wmain()
{
std::thread thread_1(function_1);
std::thread thread_2(function_2);
thread_1.join();
thread_2.join();
return 0;
}
Compiles with GCC 8.1.1 and GCC 7.3:
g++ -DUNICODE -D_DEBUG -DWIN32_LEAN_AND_MEAN -D_CRT_SECURE_NO_DEPRECATE -O0 -Og
-ggdb -Wall -c -fmessage-length=0 -Wno-unknown-pragmas -o HelloWorld.o
"..\\HelloWorld.cpp"
g++ -municode -mwindows -o thread.exe HelloWorld.o
When program runs successfully(GCC7.3)
Function 1 i = 0
Function 1 i = 1
Function 1 i = 2
Function 1 i = 3
Function 2 j = 0
Function 2 j = 1
Function 2 j = 2
Function 2 j = 3
When Program Crashes(GCC 8.1.1):
Segmentation fault
>From gcc-bugs-return-607254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 17:25:20 2018
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Subject: [Bug target/86155] std::thread
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-w64-mingw32
Component|libstdc++ |target
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It works for me with a mingw-w64 build from GCC trunk, and running under WINE.
>From gcc-bugs-return-607255-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 17:27:40 2018
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Subject: [Bug fortran/86149] generic binding in derived types
Date: Thu, 14 Jun 2018 17:27:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |janus at gcc dot gnu.org
Target Milestone|--- |9.0
--- Comment #2 from janus at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #1)
> The code compile up to revision r261447, but gives the error starting at
> r261448.
Yes, r261448 fixes exactly the intent(in) condition that is mentioned in the
Intel thread. See PR45521 for more details.
> I let Janus decide if it is the intended behavior (and why) or this is a
> regression.
It is definitely intended behavior, which makes this a bug that was fixed three
days before it was reported :D
In any case, thanks for reporting, Karl!
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Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
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Second version of source code, moved out of main function
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Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
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--- Comment #11 from ASA <aaron_sami_abassi at hotmail dot com> ---
(In reply to Richard Biener from comment #7)
> When you rename main() to foo() the calls are inlined. GCC doesn't inline
> them
> into main() because it knows they are executed exactly once which means they
> are cold and thus code growth doesn't outweight performance increase.
>
> With -Winline you see:
>
> t.C: In function ‘int main()’:
> t.C:31:1: warning: inlining failed in call to ‘void DisplayViewType(const
> ViewType&)’: call is unlikely and code size would grow [-Winline]
> DisplayViewType( const ViewType& view ) {
> ^~~~~~~~~~~~~~~
> t.C:38:20: note: called from here
> DisplayViewType( ViewType::view2( data ) );
> ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
> t.C:31:1: warning: inlining failed in call to ‘void DisplayViewType(const
> ViewType&)’: call is unlikely and code size would grow [-Winline]
> DisplayViewType( const ViewType& view ) {
> ^~~~~~~~~~~~~~~
> t.C:37:20: note: called from here
> DisplayViewType( ViewType::view1( data ) );
> ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> of course in the end the size heuristics are off and inlining would reduce
> code size.
The new version I uploaded moves the code out of main. I just generated the
Assembly output for the new source code version and GCC still does not expand
it inline.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86141
--- Comment #12 from ASA <aaron_sami_abassi at hotmail dot com> ---
I see what you're saying now.
Indeed I compiled it without a main function with
g++ -O -S -c gccbug.cpp
and it does expand DisplayViewType inline.
Thank you for clarifying the context of the optimization issue, good to know.
>From gcc-bugs-return-607261-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 19:08:25 2018
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Subject: [Bug middle-end/86122] [8/9 Regression] ICE in useless_type_conversion_p, at gimple-expr.c:87
Date: Thu, 14 Jun 2018 19:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86122
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jun 14 19:07:45 2018
New Revision: 261606
URL: https://gcc.gnu.org/viewcvs?rev=261606&root=gcc&view=rev
Log:
PR middle-end/86122
* match.pd ((A +- CST1) +- CST2): Punt if last resort
unsigned_type_for returns NULL.
* gcc.c-torture/compile/pr86122.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr86122.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/86122] [8/9 Regression] ICE in useless_type_conversion_p, at gimple-expr.c:87
Date: Thu, 14 Jun 2018 19:12:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jun 14 19:11:21 2018
New Revision: 261607
URL: https://gcc.gnu.org/viewcvs?rev=261607&root=gcc&view=rev
Log:
PR middle-end/86122
* match.pd ((A +- CST1) +- CST2): Punt if last resort
unsigned_type_for returns NULL.
* gcc.c-torture/compile/pr86122.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.c-torture/compile/pr86122.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/match.pd
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/86048] [8/9 Regression] .seh_savexmm offset is negative error when compiling libpng
Date: Thu, 14 Jun 2018 19:16:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jun 14 19:16:14 2018
New Revision: 261608
URL: https://gcc.gnu.org/viewcvs?rev=261608&root=gcc&view=rev
Log:
PR target/86048
* gcc.target/i386/pr86048.c: Require sse2 effective target. Add
-msse2 to dg-options.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr86048.c
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Subject: [Bug target/86048] [8/9 Regression] .seh_savexmm offset is negative error when compiling libpng
Date: Thu, 14 Jun 2018 19:17:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jun 14 19:16:52 2018
New Revision: 261609
URL: https://gcc.gnu.org/viewcvs?rev=261609&root=gcc&view=rev
Log:
PR target/86048
* gcc.target/i386/pr86048.c: Require sse2 effective target. Add
-msse2 to dg-options.
Modified:
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr86048.c
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From: "rebel at ameritech dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86155] std::thread
Date: Thu, 14 Jun 2018 19:25:00 -0000
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--- Comment #2 from RJE <rebel at ameritech dot net> ---
(In reply to Jonathan Wakely from comment #1)
> It works for me with a mingw-w64 build from GCC trunk, and running under
> WINE.
I get stage2 bootstrap errors when building official-gcc-trunk-e8005cb.tar.gz
on my windows10 machine. I had no problem building gcc 8.1.1.
>From gcc-bugs-return-607266-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 19:46:42 2018
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From: "gressd at vmware dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86156] New: ffmpeg clean clone fails
Date: Thu, 14 Jun 2018 19:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86156
Bug ID: 86156
Summary: ffmpeg clean clone fails
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gressd at vmware dot com
Target Milestone: ---
~/projects/FFmpeg ]# make
GEN libavutil/libavutil.version
GEN libswscale/libswscale.version
GEN libswresample/libswresample.version
GEN libavcodec/libavcodec.version
GEN libavformat/libavformat.version
GEN libavfilter/libavfilter.version
GEN libavdevice/libavdevice.version
CC libavdevice/alldevices.o
CC libavdevice/avdevice.o
libavdevice/avdevice.c: In function ‘device_next’:
libavdevice/avdevice.c:88:13: warning: ‘av_oformat_next’ is deprecated
[-Wdeprecated-declarations]
if (!(prev = av_oformat_next(prev)))
^~
In file included from libavdevice/avdevice.h:51:0,
from libavdevice/avdevice.c:23:
./libavformat/avformat.h:2088:17: note: declared here
AVOutputFormat *av_oformat_next(const AVOutputFormat *f);
^~~~~~~~~~~~~~~
libavdevice/avdevice.c:92:13: warning: ‘av_iformat_next’ is deprecated
[-Wdeprecated-declarations]
if (!(prev = av_iformat_next(prev)))
^~
In file included from libavdevice/avdevice.h:51:0,
from libavdevice/avdevice.c:23:
./libavformat/avformat.h:2080:17: note: declared here
AVInputFormat *av_iformat_next(const AVInputFormat *f);
^~~~~~~~~~~~~~~
CC libavdevice/fbdev_common.o
CC libavdevice/fbdev_dec.o
CC libavdevice/fbdev_enc.o
CC libavdevice/lavfi.o
CC libavdevice/oss.o
CC libavdevice/oss_dec.o
CC libavdevice/oss_enc.o
CC libavdevice/timefilter.o
CC libavdevice/utils.o
CC libavdevice/v4l2-common.o
CC libavdevice/v4l2.o
CC libavdevice/v4l2enc.o
AR libavdevice/libavdevice.a
GEN libavdevice/libavdevice.pc
CC libavfilter/aeval.o
CC libavfilter/af_acontrast.o
CC libavfilter/af_acopy.o
CC libavfilter/af_acrusher.o
CC libavfilter/af_adeclick.o
CC libavfilter/af_adelay.o
CC libavfilter/af_aderivative.o
CC libavfilter/af_aecho.o
CC libavfilter/af_aemphasis.o
CC libavfilter/af_afade.o
CC libavfilter/af_afftfilt.o
CC libavfilter/af_afir.o
libavfilter/af_afir.c: In function ‘filter_frame’:
libavfilter/af_afir.c:194:45: warning: assuming signed overflow does not occur
when assuming that (X - c) > X is always false [-Wstrict-overflow]
int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1;
~~~~~~~~~~~~^~~~
CC libavfilter/af_aformat.o
CC libavfilter/af_agate.o
CC libavfilter/af_aiir.o
libavfilter/af_aiir.c: In function ‘config_output’:
libavfilter/af_aiir.c:689:45: warning: assuming signed overflow does not occur
when assuming that (X - c) > X is always false [-Wstrict-overflow]
int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1;
~~~~~~~~~~~~^~~~
CC libavfilter/af_alimiter.o
CC libavfilter/af_amerge.o
CC libavfilter/af_amix.o
CC libavfilter/af_anequalizer.o
CC libavfilter/af_anull.o
CC libavfilter/af_apad.o
CC libavfilter/af_aphaser.o
CC libavfilter/af_apulsator.o
CC libavfilter/af_aresample.o
CC libavfilter/af_asetnsamples.o
CC libavfilter/af_asetrate.o
CC libavfilter/af_ashowinfo.o
CC libavfilter/af_astats.o
CC libavfilter/af_atempo.o
CC libavfilter/af_biquads.o
CC libavfilter/af_channelmap.o
CC libavfilter/af_channelsplit.o
CC libavfilter/af_chorus.o
CC libavfilter/af_compand.o
CC libavfilter/af_compensationdelay.o
CC libavfilter/af_crossfeed.o
CC libavfilter/af_crystalizer.o
CC libavfilter/af_dcshift.o
CC libavfilter/af_drmeter.o
CC libavfilter/af_dynaudnorm.o
CC libavfilter/af_earwax.o
CC libavfilter/af_extrastereo.o
CC libavfilter/af_firequalizer.o
CC libavfilter/af_flanger.o
CC libavfilter/af_haas.o
CC libavfilter/af_hdcd.o
CC libavfilter/af_headphone.o
CC libavfilter/af_join.o
CC libavfilter/af_loudnorm.o
CC libavfilter/af_mcompand.o
CC libavfilter/af_pan.o
CC libavfilter/af_replaygain.o
CC libavfilter/af_sidechaincompress.o
CC libavfilter/af_silencedetect.o
CC libavfilter/af_silenceremove.o
CC libavfilter/af_stereotools.o
CC libavfilter/af_stereowiden.o
CC libavfilter/af_superequalizer.o
CC libavfilter/af_surround.o
CC libavfilter/af_tremolo.o
CC libavfilter/af_vibrato.o
CC libavfilter/af_volume.o
CC libavfilter/af_volumedetect.o
CC libavfilter/allfilters.o
CC libavfilter/asink_anullsink.o
CC libavfilter/asrc_anoisesrc.o
CC libavfilter/asrc_anullsrc.o
CC libavfilter/asrc_hilbert.o
CC libavfilter/asrc_sine.o
CC libavfilter/audio.o
CC libavfilter/avf_abitscope.o
CC libavfilter/avf_ahistogram.o
libavfilter/avf_ahistogram.c: In function ‘filter_frame’:
libavfilter/avf_ahistogram.c:413:1: internal compiler error: Illegal
instruction
};
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [ffbuild/common.mak:60: libavfilter/avf_ahistogram.o] Error 1
root@photon-machine [ ~/projects/FFmpeg ]#
root@photon-machine [ ~/projects/FFmpeg ]# find . |grep avf_ahis
./libavfilter/avf_ahistogram.c
root@photon-machine [ ~/projects/FFmpeg ]# vi libavfilter/avf_ahistogram.c
root@photon-machine [ ~/projects/FFmpeg ]# make
CC libavfilter/avf_ahistogram.o
libavfilter/avf_ahistogram.c: In function ‘filter_frame’:
libavfilter/avf_ahistogram.c:413:1: internal compiler error: Illegal
instruction
};
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [ffbuild/common.mak:60: libavfilter/avf_ahistogram.o] Error 1
root@photon-machine [ ~/projects/FFmpeg ]# vi libavfilter/avf_ahistogram.c
root@photon-machine [ ~/projects/FFmpeg ]# make
CC libavfilter/avf_ahistogram.o
libavfilter/avf_ahistogram.c: In function ‘filter_frame’:
libavfilter/avf_ahistogram.c:413:1: internal compiler error: Illegal
instruction
};
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [ffbuild/common.mak:60: libavfilter/avf_ahistogram.o] Error 1
root@photon-machine [ ~/projects/FFmpeg ]# vi libavfilter/avf_ahistogram.c
root@photon-machine [ ~/projects/FFmpeg ]# make clean
root@photon-machine [ ~/projects/FFmpeg ]# make
GEN libavutil/libavutil.version
GEN libswscale/libswscale.version
GEN libswresample/libswresample.version
GEN libavcodec/libavcodec.version
GEN libavformat/libavformat.version
GEN libavfilter/libavfilter.version
GEN libavdevice/libavdevice.version
CC libavdevice/alldevices.o
CC libavdevice/avdevice.o
libavdevice/avdevice.c: In function ‘device_next’:
libavdevice/avdevice.c:88:13: warning: ‘av_oformat_next’ is deprecated
[-Wdeprecated-declarations]
if (!(prev = av_oformat_next(prev)))
^~
In file included from libavdevice/avdevice.h:51:0,
from libavdevice/avdevice.c:23:
./libavformat/avformat.h:2088:17: note: declared here
AVOutputFormat *av_oformat_next(const AVOutputFormat *f);
^~~~~~~~~~~~~~~
libavdevice/avdevice.c:92:13: warning: ‘av_iformat_next’ is deprecated
[-Wdeprecated-declarations]
if (!(prev = av_iformat_next(prev)))
^~
In file included from libavdevice/avdevice.h:51:0,
from libavdevice/avdevice.c:23:
./libavformat/avformat.h:2080:17: note: declared here
AVInputFormat *av_iformat_next(const AVInputFormat *f);
^~~~~~~~~~~~~~~
CC libavdevice/fbdev_common.o
CC libavdevice/fbdev_dec.o
CC libavdevice/fbdev_enc.o
CC libavdevice/lavfi.o
CC libavdevice/oss.o
CC libavdevice/oss_dec.o
CC libavdevice/oss_enc.o
CC libavdevice/timefilter.o
CC libavdevice/utils.o
CC libavdevice/v4l2-common.o
CC libavdevice/v4l2.o
CC libavdevice/v4l2enc.o
AR libavdevice/libavdevice.a
GEN libavdevice/libavdevice.pc
CC libavfilter/aeval.o
CC libavfilter/af_acontrast.o
CC libavfilter/af_acopy.o
CC libavfilter/af_acrusher.o
CC libavfilter/af_adeclick.o
CC libavfilter/af_adelay.o
CC libavfilter/af_aderivative.o
CC libavfilter/af_aecho.o
CC libavfilter/af_aemphasis.o
CC libavfilter/af_afade.o
CC libavfilter/af_afftfilt.o
CC libavfilter/af_afir.o
libavfilter/af_afir.c: In function ‘filter_frame’:
libavfilter/af_afir.c:194:45: warning: assuming signed overflow does not occur
when assuming that (X - c) > X is always false [-Wstrict-overflow]
int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1;
~~~~~~~~~~~~^~~~
CC libavfilter/af_aformat.o
CC libavfilter/af_agate.o
CC libavfilter/af_aiir.o
libavfilter/af_aiir.c: In function ‘config_output’:
libavfilter/af_aiir.c:689:45: warning: assuming signed overflow does not occur
when assuming that (X - c) > X is always false [-Wstrict-overflow]
int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1;
~~~~~~~~~~~~^~~~
CC libavfilter/af_alimiter.o
CC libavfilter/af_amerge.o
CC libavfilter/af_amix.o
CC libavfilter/af_anequalizer.o
CC libavfilter/af_anull.o
CC libavfilter/af_apad.o
CC libavfilter/af_aphaser.o
CC libavfilter/af_apulsator.o
CC libavfilter/af_aresample.o
CC libavfilter/af_asetnsamples.o
CC libavfilter/af_asetrate.o
CC libavfilter/af_ashowinfo.o
CC libavfilter/af_astats.o
CC libavfilter/af_atempo.o
CC libavfilter/af_biquads.o
CC libavfilter/af_channelmap.o
CC libavfilter/af_channelsplit.o
CC libavfilter/af_chorus.o
CC libavfilter/af_compand.o
CC libavfilter/af_compensationdelay.o
CC libavfilter/af_crossfeed.o
CC libavfilter/af_crystalizer.o
CC libavfilter/af_dcshift.o
CC libavfilter/af_drmeter.o
CC libavfilter/af_dynaudnorm.o
CC libavfilter/af_earwax.o
CC libavfilter/af_extrastereo.o
CC libavfilter/af_firequalizer.o
CC libavfilter/af_flanger.o
CC libavfilter/af_haas.o
CC libavfilter/af_hdcd.o
CC libavfilter/af_headphone.o
CC libavfilter/af_join.o
CC libavfilter/af_loudnorm.o
CC libavfilter/af_mcompand.o
CC libavfilter/af_pan.o
CC libavfilter/af_replaygain.o
CC libavfilter/af_sidechaincompress.o
CC libavfilter/af_silencedetect.o
CC libavfilter/af_silenceremove.o
CC libavfilter/af_stereotools.o
CC libavfilter/af_stereowiden.o
CC libavfilter/af_superequalizer.o
CC libavfilter/af_surround.o
CC libavfilter/af_tremolo.o
CC libavfilter/af_vibrato.o
CC libavfilter/af_volume.o
CC libavfilter/af_volumedetect.o
CC libavfilter/allfilters.o
CC libavfilter/asink_anullsink.o
CC libavfilter/asrc_anoisesrc.o
CC libavfilter/asrc_anullsrc.o
CC libavfilter/asrc_hilbert.o
CC libavfilter/asrc_sine.o
CC libavfilter/audio.o
CC libavfilter/avf_abitscope.o
CC libavfilter/avf_ahistogram.o
libavfilter/avf_ahistogram.c: In function ‘filter_frame’:
libavfilter/avf_ahistogram.c:413:1: internal compiler error: Illegal
instruction
};
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [ffbuild/common.mak:60: libavfilter/avf_ahistogram.o] Error 1
clone:
https://github.com/FFmpeg/FFmpeg.git
>From gcc-bugs-return-607267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 19:51:16 2018
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From: "gressd at vmware dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86156] ffmpeg clean clone fails
Date: Thu, 14 Jun 2018 19:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86156
--- Comment #1 from Dave Gress <gressd at vmware dot com> ---
add email
>From gcc-bugs-return-607268-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 19:54:54 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/86156] ffmpeg clean clone fails
Date: Thu, 14 Jun 2018 19:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86156
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-06-14
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Dave Gress from comment #1)
> add email
The submitter always receives all email on a bug anyway, you don't need to be
CC'd (and you don't need to say anything to add yourself either).
You haven't provided any of the necessary information, as requested by
https://gcc.gnu.org/bugs/
We need the preprocessed source and the output of 'gcc -v'
But "illegal instruction" suggests that you're using a GCC built for a
different machine, but running on an older processor which doesn't support that
build.
>From gcc-bugs-return-607269-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 20:33:14 2018
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From: "chantry.xavier at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86157] New: Wmisleading-indentation disabled after a #line directive
Date: Thu, 14 Jun 2018 20:33:00 -0000
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Bug ID: 86157
Summary: Wmisleading-indentation disabled after a #line
directive
Product: gcc
Version: 6.3.0
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Created attachment 44279
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44279&action=edit
test case with a block macro
Today at work an instance of the "goto fail" bug was discovered and fixed (4
years after being introduced).
We have a coding rule to enforce brackets even for single instructions, exactly
to avoid that kind of bug. It's quite well respected, but we have no tool to
check it.
I learned about the Wmisleading-indentation feature, that is awesome ! But we
already have gcc 6 and -Wall, and the bug was not found. That's because of that
exception : "The warning is not issued after a #line directive, since this
typically indicates autogenerated code, and no assumptions can be made about
the layout of the file that the directive references.".
That's a shame. We have a few #line directives in most of our files (compiled
by gcc) because we use an apple extension called blocks (a kind of closure).
More details at
https://techtalk.intersec.com/2014/11/blocks-rewriting-with-clang/
So it would be great to have the Wmisleading-indentation feature even for files
with #line directives, perhaps with another flag ?
Any idea or suggestion or workaround is welcome.
Well an easy workaround is to disable the #line directives just for running
that check from time to time. So I just did that but still no warning, there is
another problem, I just realized this case is more complex than it looked. See
attachment for a simplified test case. Since the first line hides a block
macro, the problem is not detected anyway.
>From gcc-bugs-return-607270-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 21:07:53 2018
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Subject: [Bug c++/86063] [6/7/8/9 Regression] g++ ICE at tree check: expected tree_list, have expr_pack_expansion in cp_check_const_attributes, at cp/decl2.c:1391
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu Jun 14 21:07:14 2018
New Revision: 261613
URL: https://gcc.gnu.org/viewcvs?rev=261613&root=gcc&view=rev
Log:
PR c++/86063
* decl2.c (cp_check_const_attributes): Skip trees that are not
TREE_LISTs.
* g++.dg/cpp0x/gen-attrs-65.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/gen-attrs-65.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl2.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/86063] [6/7/8/9 Regression] g++ ICE at tree check: expected tree_list, have expr_pack_expansion in cp_check_const_attributes, at cp/decl2.c:1391
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607272-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 21:36:42 2018
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Subject: [Bug c/55976] -Werror=return-type should error on returning a value from a void function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55976
--- Comment #12 from Dave Pagan <dave.pagan at oracle dot com> ---
New test pr55976-1.c is failing due to unaccounted for extraneous output from
the compiler. Test requires addition of dg-prune-output. Adding the directive
and will send patch shortly.
>From gcc-bugs-return-607273-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 22:19:00 2018
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Subject: [Bug testsuite/86158] New: [9 regression] gcc.c-torture/unsorted/dump-noaddr.c.*i.lto-stream-out fails starting with 261546
Date: Thu, 14 Jun 2018 22:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86158
Bug ID: 86158
Summary: [9 regression]
gcc.c-torture/unsorted/dump-noaddr.c.*i.lto-stream-out
fails starting with 261546
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
Looks like the test case needs to be updated.
make -k check-gcc
RUNTESTFLAGS=unsorted.exp=gcc.c-torture/unsorted/dump-noaddr.c
. . .
# of expected passes 1355
# of unexpected failures 2
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.*i.lto-stream-out, -O2 -flto
-fno-use-linker-plugin -flto-partition=none comparison
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.*i.lto-stream-out, -O2 -flto
-fuse-linker-plugin -fno-fat-lto-objects comparison
-
Executing on host: /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/ -fno-diagnostics-show-caret
-fdiagnostics-color=never -w -O2 -flto -fno-use-linker-plugin
-flto-partition=none -dumpbase dump2/dump-noaddr.c -DMASK=2 -x c
-fdump-ipa-all -fdump-rtl-all -fdump-tree-all -fdump-noaddr -c -o
/home/seurer/gcc/build/gcc-test2/gcc/testsuite/gcc/dump-noaddr.o
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.c-torture/unsorted/dump-noaddr.c
(timeout = 300)
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/ -fno-diagnostics-show-caret
-fdiagnostics-color=never -w -O2 -flto -fno-use-linker-plugin
-flto-partition=none -dumpbase dump2/dump-noaddr.c -DMASK=2 -x c -fdump-ipa-all
-fdump-rtl-all -fdump-tree-all -fdump-noaddr -c -o
/home/seurer/gcc/build/gcc-test2/gcc/testsuite/gcc/dump-noaddr.o
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.c-torture/unsorted/dump-noaddr.c
PASS: gcc.c-torture/unsorted/dump-noaddr.c, -O2 -flto -fno-use-linker-plugin
-flto-partition=none -dumpbase dump2/dump-noaddr.c -DMASK=2 -x c
-fdump-ipa-all -fdump-rtl-all -fdump-tree-all -fdump-noaddr
PASS: gcc.c-torture/unsorted/dump-noaddr.c.*i.cgraph, -O2 -flto
-fno-use-linker-plugin -flto-partition=none comparison
PASS: gcc.c-torture/unsorted/dump-noaddr.c.*i.ipa-clones, -O2 -flto
-fno-use-linker-plugin -flto-partition=none comparison
line #0
< Creating compressed section .gnu.lto_.profile.c056bc6c454c51b4
> Creating compressed section .gnu.lto_.profile.eda87b2a332733a2
line #2
< Creating compressed section .gnu.lto_.icf.c056bc6c454c51b4
> Creating compressed section .gnu.lto_.icf.eda87b2a332733a2
line #34
< Creating compressed section .gnu.lto_.jmpfuncs.c056bc6c454c51b4
> Creating compressed section .gnu.lto_.jmpfuncs.eda87b2a332733a2
line #36
< Creating compressed section .gnu.lto_.inline.c056bc6c454c51b4
> Creating compressed section .gnu.lto_.inline.eda87b2a332733a2
line #37
< Creating compressed section .gnu.lto_.pureconst.c056bc6c454c51b4
> Creating compressed section .gnu.lto_.pureconst.eda87b2a332733a2
line #154
< Creating compressed section .gnu.lto_f.c056bc6c454c51b4
> Creating compressed section .gnu.lto_f.eda87b2a332733a2
line #206
< Creating compressed section .gnu.lto_g.c056bc6c454c51b4
> Creating compressed section .gnu.lto_g.eda87b2a332733a2
line #217
< Creating compressed section .gnu.lto_CSWTCH.0.c056bc6c454c51b4
> Creating compressed section .gnu.lto_CSWTCH.0.eda87b2a332733a2
line #222
< Creating compressed section .gnu.lto_.symbol_nodes.c056bc6c454c51b4
> Creating compressed section .gnu.lto_.symbol_nodes.eda87b2a332733a2
line #223
< Creating compressed section .gnu.lto_.refs.c056bc6c454c51b4
> Creating compressed section .gnu.lto_.refs.eda87b2a332733a2
line #225
< Creating compressed section .gnu.lto_.decls.c056bc6c454c51b4
> Creating compressed section .gnu.lto_.decls.eda87b2a332733a2
line #382
< Creating section .gnu.lto_.symtab.c056bc6c454c51b4
> Creating section .gnu.lto_.symtab.eda87b2a332733a2
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.*i.lto-stream-out, -O2 -flto
-fno-use-linker-plugin -flto-partition=none comparison
. . .
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/ -fno-diagnostics-show-caret
-fdiagnostics-color=never -w -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects
-dumpbase dump2/dump-noaddr.c -DMASK=2 -x c -fdump-ipa-all -fdump-rtl-all
-fdump-tree-all -fdump-noaddr -c -o
/home/seurer/gcc/build/gcc-test2/gcc/testsuite/gcc/dump-noaddr.o
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.c-torture/unsorted/dump-noaddr.c
PASS: gcc.c-torture/unsorted/dump-noaddr.c, -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects -dumpbase dump2/dump-noaddr.c -DMASK=2 -x c
-fdump-ipa-all -fdump-rtl-all -fdump-tree-all -fdump-noaddr
PASS: gcc.c-torture/unsorted/dump-noaddr.c.*i.cgraph, -O2 -flto
-fuse-linker-plugin -fno-fat-lto-objects comparison
PASS: gcc.c-torture/unsorted/dump-noaddr.c.*i.ipa-clones, -O2 -flto
-fuse-linker-plugin -fno-fat-lto-objects comparison
line #0
< Creating compressed section .gnu.lto_.profile.57bb56b7c745abf6
> Creating compressed section .gnu.lto_.profile.bc5da02262074978
line #2
< Creating compressed section .gnu.lto_.icf.57bb56b7c745abf6
> Creating compressed section .gnu.lto_.icf.bc5da02262074978
line #34
< Creating compressed section .gnu.lto_.jmpfuncs.57bb56b7c745abf6
> Creating compressed section .gnu.lto_.jmpfuncs.bc5da02262074978
line #36
< Creating compressed section .gnu.lto_.inline.57bb56b7c745abf6
> Creating compressed section .gnu.lto_.inline.bc5da02262074978
line #37
< Creating compressed section .gnu.lto_.pureconst.57bb56b7c745abf6
> Creating compressed section .gnu.lto_.pureconst.bc5da02262074978
line #154
< Creating compressed section .gnu.lto_f.57bb56b7c745abf6
> Creating compressed section .gnu.lto_f.bc5da02262074978
line #206
< Creating compressed section .gnu.lto_g.57bb56b7c745abf6
> Creating compressed section .gnu.lto_g.bc5da02262074978
line #217
< Creating compressed section .gnu.lto_CSWTCH.0.57bb56b7c745abf6
> Creating compressed section .gnu.lto_CSWTCH.0.bc5da02262074978
line #222
< Creating compressed section .gnu.lto_.symbol_nodes.57bb56b7c745abf6
> Creating compressed section .gnu.lto_.symbol_nodes.bc5da02262074978
line #223
< Creating compressed section .gnu.lto_.refs.57bb56b7c745abf6
> Creating compressed section .gnu.lto_.refs.bc5da02262074978
line #225
< Creating compressed section .gnu.lto_.decls.57bb56b7c745abf6
> Creating compressed section .gnu.lto_.decls.bc5da02262074978
line #382
< Creating section .gnu.lto_.symtab.57bb56b7c745abf6
> Creating section .gnu.lto_.symtab.bc5da02262074978
FAIL: gcc.c-torture/unsorted/dump-noaddr.c.*i.lto-stream-out, -O2 -flto
-fuse-linker-plugin -fno-fat-lto-objects comparison
. . .
>From gcc-bugs-return-607274-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 22:33:58 2018
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From: "helloqirun at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86159] New: g++ ICE at -O1 and above on valid code: incorrect type of vector CONSTRUCTOR elements
Date: Thu, 14 Jun 2018 22:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86159
Bug ID: 86159
Summary: g++ ICE at -O1 and above on valid code: incorrect type
of vector CONSTRUCTOR elements
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: helloqirun at gmail dot com
Target Milestone: ---
It appears to be a recent regression.
It happens at "-O1" and above but g++-trunk compiles. g++-8.1 also compiles at
"-O1" and above.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 9.0.0 20180614 (experimental) [trunk revision 261591] (GCC)
$ g++-8.1 abc.c -c -O1
$ g++-trunk abc.c -c -O1
abc.c: In function ‘vec fn1()’:
abc.c:2:9: warning: AVX vector return without AVX enabled changes the ABI
[-Wpsabi]
vec fn1() {
^
abc.c:2:5: error: incorrect type of vector CONSTRUCTOR elements
vec fn1() {
^~~
{_7, _10, _13, _16, _19, _22, _25, _28}
_1 = {_7, _10, _13, _16, _19, _22, _25, _28};
during GIMPLE pass: veclower2
abc.c:2:5: internal compiler error: verify_gimple failed
0xee2941 verify_gimple_in_cfg(function*, bool)
../../gcc/gcc/tree-cfg.c:5405
0xdccf7f execute_function_todo
../../gcc/gcc/passes.c:1943
0xdcde8e execute_todo
../../gcc/gcc/passes.c:1997
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ cat abc.c
typedef int vec __attribute__((vector_size(32)));
vec fn1() {
vec x, zero{};
vec one = zero + 1;
return x < zero ? one : zero;
}
>From gcc-bugs-return-607275-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 22:41:03 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/64120] [F03] Wrong handling of allocatable character string
Date: Thu, 14 Jun 2018 22:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64120
Jürgen Reuter <juergen.reuter at desy dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |juergen.reuter at desy dot de
--- Comment #4 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Using the newest trunk version of gfortran I funnily get
a.out(95928,0x7fffaa769380) malloc: *** mach_vm_map(size=140732694323200)
failed (error code=3)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
Operating system error: Cannot allocate memory
Allocation would exceed memory limit
Error termination. Backtrace:
#0 0x10d7f8c6c
#1 0x10d7f98f5
#2 0x10d7f9af8
#3 0x10d7f2cd3
#4 0x10d7f2d95
#5 0x10d7f2dce
and only if I use -O3 then I get the old, buggy result `1 0`.
>From gcc-bugs-return-607276-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 22:42:19 2018
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86134] earlier diagnostic causes followup diagnostic about unknown -Wno-* options
Date: Thu, 14 Jun 2018 22:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86134
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #4)
> fails the compile but with the warning not emitted the error isn't
> emitted. Also we do know the warning is guarded by -Wreturn-type
> so I see no point in warning that it wasn't silenced by
> -Wno-unknown-warning-option?
I see what you mean: The warning that could have been silenced did not prevent
compilation but the warning about the unknown option did. However,
1) Given -Wno-foo, there is no way to know if you actually meant -Wno-foooo or,
-Wfoo is an alias for -Wreturn-type in some other version of GCC. Maybe you
really meant to write -Wno-return-type but you mistyped it as -Wno-foo. The
current behavior means "There is at least one diagnostic that could have been
silenced by -Wno-foo, but this GCC does not recognize -Wfoo, maybe you gave the
wrong option?"
2) The warning behaves like any other warning: It gets converted to an error
with -Werror. Imagine an example where GCC gives both a warning [-Wfooo] and a
warning converted to an error [-Werror=foooo], what should we report for
-Wno-fooooo ?
We can alleviate (2) by giving it a name (clang uses -Wunknown-warning-option)
so that you can do:
gcc -S -x c -Wall -Werror -Wno-error=return-type
-Wno-error=unknown-warning-option -Wno-foo
Another example:
gcc -S -x c -Wall -Werror -Wno-misleading-identation -Wno-future
If there is no warning emitted, there is no harm in the above -Wno- options.
If there is a warning emitted, it will get converted to an error, and GCC does
not know if you actually meant -Wno-misleading-indentation. And maybe you
really want to use -Wno-future for a future -Wfuture enabled by -Wall, and you
don't care but you want the same command-line to work on previous GCC versions
so giving an extra warning (or error) or may be you really meant the warning
used to be called -Wmisleading-identation, but it got renamed.
The long history can be found here: https://gcc.gnu.org/wiki/FAQ#wnowarning
>From gcc-bugs-return-607277-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 14 23:59:27 2018
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86160] New: Implement isinf on PowerPC
Date: Thu, 14 Jun 2018 23:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86160
Bug ID: 86160
Summary: Implement isinf on PowerPC
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: meissner at gcc dot gnu.org
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PowerPC with the VSX instruction set has the xststdcdp instruction that can be
used to test if a value is infinity (and the xststdcqp instruction for IEEE
128-bit). We should use this for the IEEE math builtins like __builtin_isinf.
>From gcc-bugs-return-607278-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 00:08:58 2018
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/86161] New: Add insn support for __builtin_isnormal and __builtin_fpclassify
Date: Fri, 15 Jun 2018 00:08:00 -0000
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Bug ID: 86161
Summary: Add insn support for __builtin_isnormal and
__builtin_fpclassify
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: meissner at gcc dot gnu.org
Target Milestone: ---
I was tracking down a bug in PowerPC with isnormal, and I noticed we don't have
optab support for doing either the isnormal or fpclassify builtins in-line.
Instead we generate a series of test (isnan, isinfinite, etc.) to calculate the
answer.
The PowerPC has an instruction (xststdcdp) that can simplify this operation.
There may be other backends that could improve their code if we add the optab
support for these operations.
>From gcc-bugs-return-607279-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 00:43:24 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/57965] [F03] Allocation of derived type containing an allocatable character component segfaults
Date: Fri, 15 Jun 2018 00:43:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #4 from kargl at gcc dot gnu.org ---
The original code compiles and executes. Adding some debugging
gives
(In reply to Harald Anlauf from comment #3)
> The dump tree of the allocation looks strange:
>
> a = (struct mytype *) __builtin_malloc (4);
> ...
> {
> struct mytype mytype.0;
>
> __builtin_memmove ((void *) mytype.0.str_value, (void *) &0B, 1);
> __builtin_memset ((void *) mytype.0.str_value + 1, 32, 41);
> *a = mytype.0;
> }
>
> Instead of setting the string's first character to zero,
> the memmove appears to access a null pointer.
>
> Or am I missing something?
First, the code compiles and executes without a problem.
Second, yes, that looks strange. a%str_value should be
an unallocated scalar string with a length of 42. The
__builtin_memmove looks to be setting the a%str_value to
a NULL C pointer, and then blank pads to a length of
42.
>From gcc-bugs-return-607280-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 01:03:24 2018
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Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
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ASA <aaron_sami_abassi at hotmail dot com> changed:
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--- Comment #13 from ASA <aaron_sami_abassi at hotmail dot com> ---
Created attachment 44280
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Source code which demonstrates a heuristic contrast from main
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Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
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ASA <aaron_sami_abassi at hotmail dot com> changed:
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----------------------------------------------------------------------------
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is obsolete| |
--- Comment #14 from ASA <aaron_sami_abassi at hotmail dot com> ---
Created attachment 44281
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Contrasted assembly output from g++ 7.3.0
>From gcc-bugs-return-607282-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 01:06:11 2018
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Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
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ASA <aaron_sami_abassi at hotmail dot com> changed:
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--- Comment #15 from ASA <aaron_sami_abassi at hotmail dot com> ---
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Assembly output from clang++ 5.0.0
>From gcc-bugs-return-607283-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 01:14:04 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86141] C++ Related Optimization Problem
Date: Fri, 15 Jun 2018 01:14:00 -0000
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--- Comment #16 from ASA <aaron_sami_abassi at hotmail dot com> ---
Please have a look at the new attachments (3) which demonstrate a contrast in
the heuristic determination. Acknowledging that the first method uses two
different functions and the second method uses the same function from two
distinct call points, I provide this information in case it is significant to
diagnostic analysis.
>From gcc-bugs-return-607284-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 03:32:20 2018
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Subject: [Bug c/86157] Wmisleading-indentation disabled after a #line directive
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
CC| |egallager at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=78352
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Xavier from comment #0)
>
> That's a shame. We have a few #line directives in most of our files
> (compiled by gcc) because we use an apple extension called blocks (a kind of
> closure).
Tangent, but the bug for adding blocks support to gcc is bug 78352
>
> More details at
> https://techtalk.intersec.com/2014/11/blocks-rewriting-with-clang/
>
>From gcc-bugs-return-607285-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 06:06:21 2018
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Subject: [Bug middle-end/86122] [8/9 Regression] ICE in useless_type_conversion_p, at gimple-expr.c:87
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.2+.
>From gcc-bugs-return-607286-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 06:07:35 2018
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Subject: [Bug middle-end/86123] [8/9 Regression] ICE in prepare_cmp_insn, at optabs.c:3967
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86123
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r253218.
>From gcc-bugs-return-607287-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 06:34:05 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86123] [8/9 Regression] ICE in prepare_cmp_insn, at optabs.c:3967
Date: Fri, 15 Jun 2018 06:34:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44283
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44283&action=edit
gcc9-pr86123.patch
Untested fix.
>From gcc-bugs-return-607288-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 06:34:20 2018
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From: "vekumar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86144] GCC is not generating vector math calls to svml/acml functions
Date: Fri, 15 Jun 2018 06:34:00 -0000
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--- Comment #3 from vekumar at gcc dot gnu.org ---
(In reply to Richard Biener from comment #2)
> Note a workaround would be to re-arrange the vectorizer calls to
> vectorizable_simd_clone_call and vectorizable_call. Can you check if
> the following works? It gives precedence to what the target hook
> (and thus -mveclibabi) provides.
>
> diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
> index 9f365e31e49..bdef56bf65e 100644
> --- a/gcc/tree-vect-stmts.c
> +++ b/gcc/tree-vect-stmts.c
> @@ -9543,13 +9543,13 @@ vect_analyze_stmt (gimple *stmt, bool
> *need_to_vectorize, slp_tree node,
> if (!bb_vinfo
> && (STMT_VINFO_RELEVANT_P (stmt_info)
> || STMT_VINFO_DEF_TYPE (stmt_info) == vect_reduction_def))
> - ok = (vectorizable_simd_clone_call (stmt, NULL, NULL, node, cost_vec)
> + ok = (vectorizable_call (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_conversion (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_shift (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_operation (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_assignment (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_load (stmt, NULL, NULL, node, node_instance,
> cost_vec)
> - || vectorizable_call (stmt, NULL, NULL, node, cost_vec)
> + || vectorizable_simd_clone_call (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_store (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_reduction (stmt, NULL, NULL, node, node_instance,
> cost_vec)
> @@ -9559,14 +9559,14 @@ vect_analyze_stmt (gimple *stmt, bool
> *need_to_vectorize, slp_tree node,
> else
> {
> if (bb_vinfo)
> - ok = (vectorizable_simd_clone_call (stmt, NULL, NULL, node, cost_vec)
> + ok = (vectorizable_call (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_conversion (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_shift (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_operation (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_assignment (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_load (stmt, NULL, NULL, node, node_instance,
> cost_vec)
> - || vectorizable_call (stmt, NULL, NULL, node, cost_vec)
> + || vectorizable_simd_clone_call (stmt, NULL, NULL, node,
> cost_vec)
> || vectorizable_store (stmt, NULL, NULL, node, cost_vec)
> || vectorizable_condition (stmt, NULL, NULL, NULL, 0, node,
> cost_vec)
Checked the patch now it give preference to -mveclibabi= option and generating
expected calls.
>From gcc-bugs-return-607289-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 07:16:26 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 c/86134] earlier diagnostic causes followup diagnostic about unknown -Wno-* options
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #5)
> (In reply to rguenther@suse.de from comment #4)
> > fails the compile but with the warning not emitted the error isn't
> > emitted. Also we do know the warning is guarded by -Wreturn-type
> > so I see no point in warning that it wasn't silenced by
> > -Wno-unknown-warning-option?
>
> I see what you mean: The warning that could have been silenced did not
> prevent compilation but the warning about the unknown option did. However,
>
> 1) Given -Wno-foo, there is no way to know if you actually meant -Wno-foooo
> or, -Wfoo is an alias for -Wreturn-type in some other version of GCC. Maybe
> you really meant to write -Wno-return-type but you mistyped it as -Wno-foo.
> The current behavior means "There is at least one diagnostic that could
> have been silenced by -Wno-foo, but this GCC does not recognize -Wfoo, maybe
> you gave the wrong option?"
>
> 2) The warning behaves like any other warning: It gets converted to an error
> with -Werror. Imagine an example where GCC gives both a warning [-Wfooo] and
> a warning converted to an error [-Werror=foooo], what should we report for
> -Wno-fooooo ?
>
> We can alleviate (2) by giving it a name (clang uses
> -Wunknown-warning-option) so that you can do:
>
> gcc -S -x c -Wall -Werror -Wno-error=return-type
> -Wno-error=unknown-warning-option -Wno-foo
There is no way to specify that the diagnostic about the unknown
-Wno-unknown-warning-option should not be promoted to an error.
-Wno-error=unknown-warning-option and variants do not work because
the option isn't known. The diagnostic lists [-Werror] so the only
option is to disable -Werror.
In general I question that we raise a diagnostic at all here but
I can live with that. But this diagnostic about unknown options
should never be promoted to errors from warnings IMHO.
> Another example:
>
> gcc -S -x c -Wall -Werror -Wno-misleading-identation -Wno-future
>
> If there is no warning emitted, there is no harm in the above -Wno- options.
>
> If there is a warning emitted, it will get converted to an error, and GCC
> does not know if you actually meant -Wno-misleading-indentation. And maybe
> you really want to use -Wno-future for a future -Wfuture enabled by -Wall,
> and you don't care but you want the same command-line to work on previous
> GCC versions so giving an extra warning (or error) or may be you really
> meant the warning used to be called -Wmisleading-identation, but it got
> renamed.
Sure. But if you come back to my case where I had -Werror and specifically
disabled promoting a specific warning to an error then I got what I wanted
and there's no point in erroring for the unknown warning option.
I guess a solution would be to not emit a warning about the unknown option
but a note (using inform).
Joseph, do you agree that the following shouldn't fail the compilation?
> echo 'int main(){}' | gcc -S -x c -Wno-unknown-warning-option -Wall -Werror -Wno-error=return-type -
<stdin>: In function ‘main’:
<stdin>:1:1: warning: control reaches end of non-void function [-Wreturn-type]
<stdin>: At top level:
cc1: error: unrecognized command line option "-Wno-unknown-warning-option"
[-Werror]
cc1: all warnings being treated as errors
>From gcc-bugs-return-607290-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 07:25:50 2018
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Subject: [Bug tree-optimization/86076] [7/8 Regression] ICE: verify_gimple failed (error: location references block not in block tree)
Date: Fri, 15 Jun 2018 07:25:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Jun 15 07:25:13 2018
New Revision: 261620
URL: https://gcc.gnu.org/viewcvs?rev=261620&root=gcc&view=rev
Log:
2018-06-15 Richard Biener <rguenther@suse.de>
PR middle-end/86076
* tree-cfg.c (move_stmt_op): unshare invariant addresses
before adjusting their block.
* gcc.dg/pr86076.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr86076.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-cfg.c
>From gcc-bugs-return-607291-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 07:36:34 2018
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Subject: [Bug target/85961] scratch register rsi used after function call
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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CC| |jsm28 at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Alexander Monakov from comment #3)
> You'd need to disable IPA-RA after forcing -O2 with the pragma, i.e.:
>
> #pragma GCC optimize "O2"
> #pragma GCC optimize "no-ipa-ra"
>
> We already have logic to disable IPA-RA when instrumentation/profiling is
> active, but it's done once in toplev.c. Here the pragma re-enables IPA-RA
> after toplev.c:process_options() has disabled it.
>
> Do we want to adjust it given that "pragma optimized" is documented as "not
> suitable for production use"?
Hmm, given that -pg -O2 on the command-line doesn't get you IPA-RA
enabled I would argue that the #pragma optimize behavior is bogus ...
The issue here is that all "special" processing in toplev.c is lost.
I'm not sure why we do all this in process_options () rather than
in finish_options () because that is called again after applying optimize
options AFAICS.
So - all process_options () option post-processing should go away and be moved
to finish_options ()?
Note that process_options () is only called from do_compile and we do
the postprocessing after lang_hooks.post_options which is applied only
after finish_options () post-processing...
>From gcc-bugs-return-607292-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 07:56:28 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/86108] [8/9 Regression] crash during unwinding with -O2
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with my r259378.
>From gcc-bugs-return-607293-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 07:59:51 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86159] [7/8/9 Regression] g++ ICE at -O1 and above on valid code: incorrect type of vector CONSTRUCTOR elements
Date: Fri, 15 Jun 2018 07:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86159
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |ASSIGNED
Known to work| |6.4.1
Version|unknown |8.1.1
Keywords| |ice-on-valid-code,
| |needs-bisection
Last reconfirmed| |2018-06-15
Component|c++ |tree-optimization
Ever confirmed|0 |1
Summary|g++ ICE at -O1 and above on |[7/8/9 Regression] g++ ICE
|valid code: incorrect type |at -O1 and above on valid
|of vector CONSTRUCTOR |code: incorrect type of
|elements |vector CONSTRUCTOR elements
Target Milestone|--- |7.4
Known to fail| |7.3.1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Works on the GCC 6 branch.
We have a mismatch between signed int vector and unsigned int elements in
the constructor. I will have a looksee.
>From gcc-bugs-return-607294-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 08:00:08 2018
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Subject: [Bug testsuite/86158] [9 regression] gcc.c-torture/unsorted/dump-noaddr.c.*i.lto-stream-out fails starting with 261546
Date: Fri, 15 Jun 2018 08:00:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-607295-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 08:01:46 2018
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Subject: [Bug c/86156] ffmpeg clean clone fails
Date: Fri, 15 Jun 2018 08:01:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Or a support library like gmp or mpfr or mpc is built for a different
architecture.
>From gcc-bugs-return-607297-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 08:03:58 2018
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Subject: [Bug bootstrap/86162] [6 Regression] ppc64le bootstrap fails with GCC 8
Date: Fri, 15 Jun 2018 08:03:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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>From gcc-bugs-return-607296-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 08:03:28 2018
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Subject: [Bug bootstrap/86162] New: [6 Regression] ppc64le bootstrap fails with GCC 8
Date: Fri, 15 Jun 2018 08:03:00 -0000
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Bug ID: 86162
Summary: [6 Regression] ppc64le bootstrap fails with GCC 8
Product: gcc
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It's clone of:
https://bugzilla.suse.com/show_bug.cgi?id=1097283&GoAheadAndLogIn=1
[ 171s] g++ -fmessage-length=0 -grecord-gcc-switches -O2 -D_FORTIFY_SOURCE=2
-funwind-tables -fasynchronous-unwind-tables -U_FORTIFY_SOURCE -DIN_GCC
-DCROSS_DIRECTORY_STRUCTURE -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H
-DGENERATOR_FILE -fno-PIE -static-libstdc++ -static-libgcc -no-pie -o
build/gentarget-def \
[ 171s] build/gentarget-def.o build/rtl.o build/read-rtl.o
build/ggc-none.o build/vec.o build/min-insn-modes.o build/gensupport.o
build/print-rtl.o build/hash-table.o build/read-md.o build/errors.o
../build-powerpc64le-suse-linux/libiberty/libiberty.a
[ 171s] build/genmatch --gimple ../../gcc/match.pd \
[ 171s] > tmp-gimple-match.c
[ 171s] ../../gcc/match.pd:120:1 error: expected (, got NAME
[ 171s] negative value by 0 gives -0, not +0. */
We are missing lex.c hunk from r256656.
>From gcc-bugs-return-607298-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 08:04:23 2018
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Subject: [Bug other/86153] [9 regression] test case g++.dg/pr83239.C fails starting with r261585
Date: Fri, 15 Jun 2018 08:04:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
The testcase says the absence of the warning depends on the inlining but it
seems it doesn't (no extra diagnostic reported). So maybe just remove this
dump-scanning.
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Subject: [Bug tree-optimization/86159] [6/7/8/9 Regression] g++ ICE at -O1 and above on valid code: incorrect type of vector CONSTRUCTOR elements
Date: Fri, 15 Jun 2018 08:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|7.4 |6.5
Summary|[7/8/9 Regression] g++ ICE |[6/7/8/9 Regression] g++
|at -O1 and above on valid |ICE at -O1 and above on
|code: incorrect type of |valid code: incorrect type
|vector CONSTRUCTOR elements |of vector CONSTRUCTOR
| |elements
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is just latent on the GCC 6 branch.
>From gcc-bugs-return-607300-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 08:36:55 2018
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From: "lopezibanez at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86134] earlier diagnostic causes followup diagnostic about unknown -Wno-* options
Date: Fri, 15 Jun 2018 08:36:00 -0000
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--- Comment #7 from Manuel López-Ibáñez <lopezibanez at gmail dot com> ---
What I'm suggesting is to add an option to control this warning, which is
currently enabled by default. Then you can use -Wno-error or even -Wno- to
make it always a warning or completely disable it. This what clang does.
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Subject: [Bug c/86134] earlier diagnostic causes followup diagnostic about unknown -Wno-* options
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86134
--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 15 Jun 2018, lopezibanez at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86134
>
> --- Comment #7 from Manuel López-Ibáñez <lopezibanez at gmail dot com> ---
> What I'm suggesting is to add an option to control this warning, which is
> currently enabled by default. Then you can use -Wno-error or even -Wno- to
> make it always a warning or completely disable it. This what clang does.
That sounds reasonable but then don't you have a chicken-and-egg
issue because you'd need to say
-Wno-unknown-warning-option
which when not known in old compilers will cause the very same issue
with -Werror ...
What's bad about changing the diagnostic to be emitted as a note
after the very first warning that is emitted? So
> echo 'int main(){}' | gcc -S -x c -Wno-unknown-warning-option -Wall
-Werror -Wno-error=return-type -
<stdin>: In function ‘main’:
<stdin>:1:1: warning: control reaches end of non-void function
[-Wreturn-type]
<stdin>: note: unrecognized command line option "-Wno-unknown-warning-option"
may have silenced this or further diagnostics
...
? Which also makes the intent of the warning more explicit.
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From: "TonyELewis at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80485] rejects-valid: constexpr static_cast of pointer-to-member-function to bool
Date: Fri, 15 Jun 2018 08:50:00 -0000
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--- Comment #5 from Tony E Lewis <TonyELewis at hotmail dot com> ---
Thanks to all for all work on this.
(Apologies if this isn't helpful but just in case it is...) I notice that the
original Godbolt snippet ( https://godbolt.org/g/JnrZss ) has regressed from a
rejects-valid in 8.1 to an ICE on trunk ("9.0.0 20180610") :
g++: internal compiler error: Segmentation fault signal terminated program as
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 4
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Subject: [Bug testsuite/86158] [9 regression] gcc.c-torture/unsorted/dump-noaddr.c.*i.lto-stream-out fails starting with 261546
Date: Fri, 15 Jun 2018 09:06:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #2 from Christophe Lyon <clyon at gcc dot gnu.org> ---
The problem appeared between r261472 and r261580
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Subject: [Bug testsuite/86158] [9 regression] gcc.c-torture/unsorted/dump-noaddr.c.*i.lto-stream-out fails starting with 261546
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--- Comment #3 from Jan Hubicka <hubicka at ucw dot cz> ---
The dumps contains addresses of tree nodes streamed. I will work out how to
silence them.
Honza
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Subject: [Bug rtl-optimization/86108] [8/9 Regression] crash during unwinding with -O2
Date: Fri, 15 Jun 2018 09:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86108
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The IL seems to be still correct in *.csa dump, where we have:
(code_label/s 1755 2240 1758 246 1802 (nil) [1 uses])
(note 1758 1755 1756 246 [bb 246] NOTE_INSN_BASIC_BLOCK)
(insn 1756 1758 1757 246 (set (reg:DI 41 r12 [469])
(reg:DI 0 ax)) 85 {*movdi_internal}
(expr_list:REG_DEAD (reg:DI 0 ax)
(nil)))
(insn 1757 1756 2081 246 (set (reg:DI 43 r14 [471])
(reg:DI 1 dx)) 85 {*movdi_internal}
(expr_list:REG_DEAD (reg:DI 1 dx)
(nil)))
(jump_insn/j 2081 1757 2082 246 (set (pc)
(label_ref 1284)) 683 {jump}
(nil)
...
(code_label 1284 2082 1285 247 1737 (nil) [1 uses])
(note 1285 1284 1286 247 [bb 247] NOTE_INSN_BASIC_BLOCK)
(insn 1286 1285 1287 247 (set (reg:DI 4 si)
(const_int 48 [0x30])) "pr86108.C":1553 85 {*movdi_internal}
(nil))
(insn 1287 1286 1288 247 (set (reg:DI 5 di)
(reg/f:DI 3 bx [orig:94 rLoad ] [94])) "pr86108.C":1553 85
{*movdi_internal}
(expr_list:REG_DEAD (reg/f:DI 3 bx [orig:94 rLoad ] [94])
(nil)))
(call_insn 1288 1287 1289 247 (call (mem:QI (symbol_ref:DI ("_ZdlPvm") [flags
0x41] <function_decl 0x7ff737519100 operator delete>) [0 operator de
(const_int 0 [0])) "pr86108.C":1553 689 {*call}
(expr_list:REG_DEAD (reg:DI 5 di)
(expr_list:REG_DEAD (reg:DI 4 si)
(expr_list:REG_CALL_DECL (symbol_ref:DI ("_ZdlPvm") [flags 0x41]
<function_decl 0x7ff737519100 operator delete>)
(expr_list:REG_EH_REGION (const_int 0 [0])
(nil)))))
(expr_list:DI (use (reg:DI 5 di))
(expr_list:DI (use (reg:DI 4 si))
(nil))))
(insn 1289 1288 1290 247 (set (reg:DI 0 ax [468])
(reg:DI 41 r12 [469])) 85 {*movdi_internal}
(expr_list:REG_DEAD (reg:DI 41 r12 [469])
(nil)))
(insn 1290 1289 2241 247 (set (reg:DI 1 dx [470])
(reg:DI 43 r14 [471])) 85 {*movdi_internal}
(expr_list:REG_DEAD (reg:DI 43 r14 [471])
(nil)))
(jump_insn 2241 1290 2242 247 (set (pc)
(label_ref 1443)) 683 {jump}
(nil)
-> 1443)
But *.jump2 breaks it by throwing away the saving/restoring of rax/rdx to/from
r12/r14, apparently during RTL fast DCE during that pass.
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Subject: [Bug bootstrap/86162] [6 Regression] ppc64le bootstrap fails with GCC 8
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Version|unknown |6.4.1
Resolution|--- |FIXED
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug rtl-optimization/86108] [8/9 Regression] crash during unwinding with -O2
Date: Fri, 15 Jun 2018 09:35:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Looking at csa dump in more detail, from the block with abnormal predecessor we
have a long series of quite short bbs ending with unconditional jumps, often
containing some call. The bb with abnormal predecessor gets the two EH regs in
ax/dx and copies them over to r12/r14. The next bb copies those back into
ax/dx. Next bb copies those to r14/bx. Next 6 do useless ax=r14;r14=ax, then
next bb does di=r14 and finally there is a bb that compares bx and
conditionally calls _Unwind_Resume with the di argument. DF info looks ok to
me in this dump. This chain of copying around the EH values is what the fast
RTL DCE during jump2 breaks.
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Subject: [Bug c++/86163] New: std::regex crashes when matching long lines
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Bug ID: 86163
Summary: std::regex crashes when matching long lines
Product: gcc
Version: 7.1.0
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Priority: P3
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Target Milestone: ---
std::regex crashes when matching long lines.
Here is an example:
#include <regex>
#include <iostream>
int main()
{
std::string s (100'000, '*');
std::smatch m;
std::regex r ("^(.*?)$");
std::regex_search (s, m, r);
std::cout << s .substr (0, 10) << std::endl;
std::cout << m .str (1) .substr (0, 10) << std::endl;
}
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86164
Bug ID: 86164
Summary: std::regex crashes when matching long lines
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: holger.seelig at yahoo dot de
Target Milestone: ---
std::regex crashes when matching long lines.
Here is an example:
#include <regex>
#include <iostream>
int main()
{
std::string s (100'000, '*');
std::smatch m;
std::regex r ("^(.*?)$");
std::regex_search (s, m, r);
std::cout << s .substr (0, 10) << std::endl;
std::cout << m .str (1) .substr (0, 10) << std::endl;
}
It turns out that std::regex_search operator .* is implemented recursively
which result in this example in a stack overflow.
>From gcc-bugs-return-607310-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 10:49:59 2018
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Subject: [Bug c++/86165] New: std::regex crashes when matching long lines.
Date: Fri, 15 Jun 2018 10:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86165
Bug ID: 86165
Summary: std::regex crashes when matching long lines.
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: holger.seelig at yahoo dot de
Target Milestone: ---
std::regex crashes when matching long lines.
Here is an example:
#include <regex>
#include <iostream>
int main()
{
std::string s (100'000, '*');
std::smatch m;
std::regex r ("^(.*?)$");
std::regex_search (s, m, r);
std::cout << s .substr (0, 10) << std::endl;
std::cout << m .str (1) .substr (0, 10) << std::endl;
}
It turns out that std::regex_search operator .* is implemented recursively
which result in this example in a stack overflow.
>From gcc-bugs-return-607311-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 11:09:11 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/86159] [6/7/8 Regression] g++ ICE at -O1 and above on valid code: incorrect type of vector CONSTRUCTOR elements
Date: Fri, 15 Jun 2018 11:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86159
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[6/7/8/9 Regression] g++ |[6/7/8 Regression] g++ ICE
|ICE at -O1 and above on |at -O1 and above on valid
|valid code: incorrect type |code: incorrect type of
|of vector CONSTRUCTOR |vector CONSTRUCTOR elements
|elements |
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-607312-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 11:11:04 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86159] [6/7/8 Regression] g++ ICE at -O1 and above on valid code: incorrect type of vector CONSTRUCTOR elements
Date: Fri, 15 Jun 2018 11:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|needs-bisection |
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Jun 15 11:08:30 2018
New Revision: 261622
URL: https://gcc.gnu.org/viewcvs?rev=261622&root=gcc&view=rev
Log:
2018-06-15 Richard Biener <rguenther@suse.de>
PR middle-end/86159
* tree-cfg.c (gimplify_build3): Do not strip sign conversions,
leave useless conversion stripping to force_gimple_operand_gsi.
(gimplify_build2): Likewise.
(gimplify_build1): Likewise.
* g++.dg/pr86159.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/pr86159.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-cfg.c
>From gcc-bugs-return-607313-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 11:16:31 2018
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Subject: [Bug c++/86163] std::regex crashes when matching long lines
Date: Fri, 15 Jun 2018 11:14:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Dup.
*** This bug has been marked as a duplicate of bug 86164 ***
>From gcc-bugs-return-607314-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 11:17:41 2018
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Subject: [Bug c++/86164] std::regex crashes when matching long lines
Date: Fri, 15 Jun 2018 11:16:00 -0000
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--- Comment #1 from ktkachov at gcc dot gnu.org ---
*** Bug 86163 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607316-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 11:17:48 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86164] std::regex crashes when matching long lines
Date: Fri, 15 Jun 2018 11:17:00 -0000
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
*** Bug 86165 has been marked as a duplicate of this bug. ***
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86165] std::regex crashes when matching long lines.
Date: Fri, 15 Jun 2018 11:17:00 -0000
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #1 from ktkachov at gcc dot gnu.org ---
Dup.
*** This bug has been marked as a duplicate of bug 86164 ***
>From gcc-bugs-return-607317-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 11:59:08 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/86108] [8/9 Regression] crash during unwinding with -O2
Date: Fri, 15 Jun 2018 11:59:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The problem is in cross-jumping, we have a landing pad with one EDGE_CROSSING
and some EH predecessor edges. The DF code treats the bb_has_eh_pred specially
and creates artificial generation of the EH_RETURN_DATA_REGNO blocks at the
start of those blocks, rather than making those regs visible on the in edge.
I've tried:
--- gcc/bb-reorder.c.jj 2018-05-31 21:51:18.508292965 +0200
+++ gcc/bb-reorder.c 2018-06-15 12:57:34.501095317 +0200
@@ -1507,8 +1507,11 @@ dw2_fix_up_crossing_landing_pad (eh_land
new_lp->landing_pad = gen_label_rtx ();
LABEL_PRESERVE_P (new_lp->landing_pad) = 1;
+ e = split_block_after_labels (old_bb);
+ old_bb = e->src;
+
/* Create the forwarder block. */
- basic_block new_bb = create_forwarder_block (new_lp->landing_pad, old_bb);
+ basic_block new_bb = create_forwarder_block (new_lp->landing_pad, e->dest);
/* Fix up the edges. */
for (ei = ei_start (old_bb->preds); (e = ei_safe_edge (ei)) != NULL; )
to make sure we don't have bbs with both EDGE_CROSSING and EH incoming edges.
Another possibility is to disallow cross-jumping of the bb_has_eh_pred basic
blocks, like:
--- gcc/cfgcleanup.c.jj 2018-04-25 09:41:37.753686037 +0200
+++ gcc/cfgcleanup.c 2018-06-15 13:18:43.173257421 +0200
@@ -1976,6 +1976,12 @@ try_crossjump_to_edge (int mode, edge e1
if (!outgoing_edges_match (mode, src1, src2))
return false;
+ /* The DF uses magic for EH landing pads where the EH_RETURN_DATA_REGNO
+ regs are artificially defined at the start. Avoid cross-jumping in
+ between the EH landing pads and other bbs. */
+ if (bb_has_eh_pred (src1) != bb_has_eh_pred (src2))
+ return false;
+
/* ... and part the second. */
nmatch = flow_find_cross_jump (src1, src2, &newpos1, &newpos2, &dir);
Either of the patches fix the testcase, there is some code growth though, but
maybe it is mainly about adding the missing register moves that are incorrectly
missing without them. Without the patches main has 3259 bytes and main.cold
1276 bytes, with the first path it is 3337/1371 bytes and with the second patch
instead 3337/1374 bytes.
Conceptually, I think the first patch is better, the DF info isn't incorrect
then (if we have bbs with both crossing and EH predecessors, we don't mention
the EH regs in lr/live in on the EH pad nor in lr/live out on the EH pad in the
other partition that just branches to it.
>From gcc-bugs-return-607318-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 12:10:40 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/86153] [9 regression] test case g++.dg/pr83239.C fails starting with r261585
Date: Fri, 15 Jun 2018 12:10:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target|powerpc64*-*-* |powerpc64*-*-* aarch64
CC| |clyon at gcc dot gnu.org
--- Comment #3 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Seen on aarch64 too.
>From gcc-bugs-return-607319-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 12:24:48 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Fri, 15 Jun 2018 12:24:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-607320-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 12:32:35 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86095] [8/9 Regression] documentation for -Wunsafe-loop-optimizations references options which have no effect any more
Date: Fri, 15 Jun 2018 12:32:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |amker at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Indeed, PR81408 r250304 removed the only remaining case of
-Wunsafe-loop-optimizations warning, so the warning option doesn't do anything.
We should remove its documentation at least, and make it
Common Ignore Warning
Does nothing. Preserved for backward compatibility.
in common.opt.
>From gcc-bugs-return-607321-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 12:42:35 2018
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Subject: [Bug c++/86094] [8/9 Regression] Call ABI changed for small objects with defaulted ctor
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 12:47:28 2018
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Subject: [Bug rtl-optimization/86108] [8/9 Regression] crash during unwinding with -O2
Date: Fri, 15 Jun 2018 12:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86108
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #5)
> The problem is in cross-jumping, we have a landing pad with one
> EDGE_CROSSING and some EH predecessor edges. The DF code treats the
> bb_has_eh_pred specially and creates artificial generation of the
> EH_RETURN_DATA_REGNO blocks at the start of those blocks, rather than making
> those regs visible on the in edge.
>
> I've tried:
> --- gcc/bb-reorder.c.jj 2018-05-31 21:51:18.508292965 +0200
> +++ gcc/bb-reorder.c 2018-06-15 12:57:34.501095317 +0200
> @@ -1507,8 +1507,11 @@ dw2_fix_up_crossing_landing_pad (eh_land
> new_lp->landing_pad = gen_label_rtx ();
> LABEL_PRESERVE_P (new_lp->landing_pad) = 1;
>
> + e = split_block_after_labels (old_bb);
> + old_bb = e->src;
> +
> /* Create the forwarder block. */
> - basic_block new_bb = create_forwarder_block (new_lp->landing_pad, old_bb);
> + basic_block new_bb = create_forwarder_block (new_lp->landing_pad,
> e->dest);
>
> /* Fix up the edges. */
> for (ei = ei_start (old_bb->preds); (e = ei_safe_edge (ei)) != NULL; )
> to make sure we don't have bbs with both EDGE_CROSSING and EH incoming edges.
> Another possibility is to disallow cross-jumping of the bb_has_eh_pred basic
> blocks, like:
> --- gcc/cfgcleanup.c.jj 2018-04-25 09:41:37.753686037 +0200
> +++ gcc/cfgcleanup.c 2018-06-15 13:18:43.173257421 +0200
> @@ -1976,6 +1976,12 @@ try_crossjump_to_edge (int mode, edge e1
> if (!outgoing_edges_match (mode, src1, src2))
> return false;
>
> + /* The DF uses magic for EH landing pads where the EH_RETURN_DATA_REGNO
> + regs are artificially defined at the start. Avoid cross-jumping in
> + between the EH landing pads and other bbs. */
> + if (bb_has_eh_pred (src1) != bb_has_eh_pred (src2))
> + return false;
> +
> /* ... and part the second. */
> nmatch = flow_find_cross_jump (src1, src2, &newpos1, &newpos2, &dir);
>
> Either of the patches fix the testcase, there is some code growth though,
> but maybe it is mainly about adding the missing register moves that are
> incorrectly missing without them. Without the patches main has 3259 bytes
> and main.cold 1276 bytes, with the first path it is 3337/1371 bytes and with
> the second patch instead 3337/1374 bytes.
> Conceptually, I think the first patch is better, the DF info isn't incorrect
> then (if we have bbs with both crossing and EH predecessors, we don't
> mention the EH regs in lr/live in on the EH pad nor in lr/live out on the EH
> pad in the other partition that just branches to it.
You mean without splitting the block the DF info is incorrect? If so should
we add sth to verify-flow-info that makes sure we do not have EDGE_CROSSING
and EH incoming edges? Can't an EH edge be EDGE_CROSSING itself?
>From gcc-bugs-return-607323-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 12:50:15 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/86108] [8/9 Regression] crash during unwinding with -O2
Date: Fri, 15 Jun 2018 12:50:00 -0000
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--- Comment #7 from Jan Hubicka <hubicka at ucw dot cz> ---
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86108
>
> --- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
> (In reply to Jakub Jelinek from comment #5)
> > The problem is in cross-jumping, we have a landing pad with one
> > EDGE_CROSSING and some EH predecessor edges. The DF code treats the
> > bb_has_eh_pred specially and creates artificial generation of the
> > EH_RETURN_DATA_REGNO blocks at the start of those blocks, rather than making
> > those regs visible on the in edge.
> >
> > I've tried:
> > --- gcc/bb-reorder.c.jj 2018-05-31 21:51:18.508292965 +0200
> > +++ gcc/bb-reorder.c 2018-06-15 12:57:34.501095317 +0200
> > @@ -1507,8 +1507,11 @@ dw2_fix_up_crossing_landing_pad (eh_land
> > new_lp->landing_pad = gen_label_rtx ();
> > LABEL_PRESERVE_P (new_lp->landing_pad) = 1;
> >
> > + e = split_block_after_labels (old_bb);
> > + old_bb = e->src;
> > +
> > /* Create the forwarder block. */
> > - basic_block new_bb = create_forwarder_block (new_lp->landing_pad, old_bb);
> > + basic_block new_bb = create_forwarder_block (new_lp->landing_pad,
> > e->dest);
> >
> > /* Fix up the edges. */
> > for (ei = ei_start (old_bb->preds); (e = ei_safe_edge (ei)) != NULL; )
> > to make sure we don't have bbs with both EDGE_CROSSING and EH incoming edges.
> > Another possibility is to disallow cross-jumping of the bb_has_eh_pred basic
> > blocks, like:
> > --- gcc/cfgcleanup.c.jj 2018-04-25 09:41:37.753686037 +0200
> > +++ gcc/cfgcleanup.c 2018-06-15 13:18:43.173257421 +0200
> > @@ -1976,6 +1976,12 @@ try_crossjump_to_edge (int mode, edge e1
> > if (!outgoing_edges_match (mode, src1, src2))
> > return false;
> >
> > + /* The DF uses magic for EH landing pads where the EH_RETURN_DATA_REGNO
> > + regs are artificially defined at the start. Avoid cross-jumping in
> > + between the EH landing pads and other bbs. */
> > + if (bb_has_eh_pred (src1) != bb_has_eh_pred (src2))
> > + return false;
> > +
> > /* ... and part the second. */
> > nmatch = flow_find_cross_jump (src1, src2, &newpos1, &newpos2, &dir);
> >
> > Either of the patches fix the testcase, there is some code growth though,
> > but maybe it is mainly about adding the missing register moves that are
> > incorrectly missing without them. Without the patches main has 3259 bytes
> > and main.cold 1276 bytes, with the first path it is 3337/1371 bytes and with
> > the second patch instead 3337/1374 bytes.
> > Conceptually, I think the first patch is better, the DF info isn't incorrect
> > then (if we have bbs with both crossing and EH predecessors, we don't
> > mention the EH regs in lr/live in on the EH pad nor in lr/live out on the EH
> > pad in the other partition that just branches to it.
>
> You mean without splitting the block the DF info is incorrect? If so should
> we add sth to verify-flow-info that makes sure we do not have EDGE_CROSSING
> and EH incoming edges? Can't an EH edge be EDGE_CROSSING itself?
With dwarf debug info EH edges needs to be non-crossing because they are
represented
by relative relocations. AFAIK
Honza
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
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Subject: [Bug rtl-optimization/86108] [8/9 Regression] crash during unwinding with -O2
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86108
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It is not about crossing or not crossing, but rather about EH predecessors
mixed with non-{EH,abnormal} edges or so.
Without the patch we have:
;; basic block 289, loop depth 0, count 0, probably never executed
;; prev block 288, next block 290, flags: (REACHABLE, COLD_PARTITION, RTL,
MODIFIED)
;; pred: 285 [always] count:0 (CROSSING)
;; 288 [never] count:0 (FALLTHRU)
;; 282 [always] count:0
;; 280 [always] count:0 (CROSSING)
...
;; bb 289 artificial_defs: { }
;; bb 289 artificial_uses: { u-1(6){ }u-1(7){ }}
;; lr in 0 [ax] 1 [dx] 6 [bp] 7 [sp] 16 [argp] 20 [frame]
;; lr use 0 [ax] 1 [dx] 6 [bp] 7 [sp]
;; lr def 3 [bx] 43 [r14]
;; live in 0 [ax] 1 [dx] 6 [bp] 7 [sp] 20 [frame]
;; live gen 3 [bx] 43 [r14]
;; live kill
(code_label 1443 2474 1444 289 1738 (nil) [28 uses])
(note 1444 1443 1445 289 [bb 289] NOTE_INSN_BASIC_BLOCK)
(insn 1445 1444 1446 289 (set (reg:DI 43 r14 [464])
(reg:DI 0 ax [468])) 85 {*movdi_internal}
(expr_list:REG_DEAD (reg:DI 0 ax [468])
(nil)))
(insn 1446 1445 2297 289 (set (reg:DI 3 bx [466])
(reg:DI 1 dx [470])) 85 {*movdi_internal}
(expr_list:REG_DEAD (reg:DI 1 dx [470])
(nil)))
(jump_insn 2297 1446 2298 289 (set (pc)
(label_ref 1447)) 683 {jump}
(nil)
-> 1447)
;; succ: 291 [always] count:0
;; lr out 3 [bx] 6 [bp] 7 [sp] 16 [argp] 20 [frame] 43 [r14]
;; live out 3 [bx] 6 [bp] 7 [sp] 20 [frame] 43 [r14]
;; basic block 290, loop depth 0, count 0, probably never executed
;; prev block 289, next block 291, flags: (REACHABLE, COLD_PARTITION, RTL,
MODIFIED)
;; pred: 311 [always] count:0 (CROSSING)
;; 94 [never] count:0 (ABNORMAL,ABNORMAL_CALL,EH)
;; bb 290 artificial_defs: { d32(0){ }d384(1){ }}
;; bb 290 artificial_uses: { u-1(6){ }u-1(7){ }u-1(16){ }u-1(20){ }}
;; lr in 6 [bp] 7 [sp] 16 [argp] 20 [frame]
;; lr use 6 [bp] 7 [sp] 16 [argp] 20 [frame]
;; lr def 0 [ax] 1 [dx] 3 [bx] 43 [r14]
;; live in 6 [bp] 7 [sp] 20 [frame]
;; live gen 0 [ax] 1 [dx] 3 [bx] 43 [r14]
;; live kill
(code_label/s 1739 2298 1744 290 1798 (nil) [2 uses])
(note 1744 1739 1740 290 [bb 290] NOTE_INSN_BASIC_BLOCK)
(insn 1740 1744 1741 290 (set (reg:DI 43 r14 [464])
(reg:DI 0 ax)) 85 {*movdi_internal}
(expr_list:REG_DEAD (reg:DI 0 ax)
(nil)))
(insn 1741 1740 1447 290 (set (reg:DI 3 bx [466])
(reg:DI 1 dx)) 85 {*movdi_internal}
(expr_list:REG_DEAD (reg:DI 1 dx)
(nil)))
;; succ: 291 [always] count:0 (FALLTHRU)
;; lr out 3 [bx] 6 [bp] 7 [sp] 16 [argp] 20 [frame] 43 [r14]
;; live out 3 [bx] 6 [bp] 7 [sp] 20 [frame] 43 [r14]
and
;; basic block 311, loop depth 0, count 0, probably never executed
;; prev block 310, next block 1, flags: (REACHABLE, HOT_PARTITION, RTL,
MODIFIED)
;; pred: 77 [never] count:0 (ABNORMAL,ABNORMAL_CALL,EH)
;; 80 [never] count:0 (ABNORMAL,ABNORMAL_CALL,EH)
;; 95 [never] count:0 (ABNORMAL,ABNORMAL_CALL,EH)
;; bb 311 artificial_defs: { d1(0){ }d359(1){ }}
;; bb 311 artificial_uses: { u-1(6){ }u-1(7){ }u-1(16){ }u-1(20){ }}
;; lr in 6 [bp] 7 [sp] 16 [argp] 20 [frame]
;; lr use 6 [bp] 7 [sp] 16 [argp] 20 [frame]
;; lr def 0 [ax] 1 [dx]
;; live in 6 [bp] 7 [sp] 20 [frame]
;; live gen 0 [ax] 1 [dx]
;; live kill
(code_label/s 2028 2505 2030 311 1833 (nil) [1 uses])
(note 2030 2028 2029 311 [bb 311] NOTE_INSN_BASIC_BLOCK)
(jump_insn/j 2029 2030 2031 311 (set (pc)
(label_ref 1739)) 683 {jump}
(nil)
-> 1739)
;; succ: 290 [always] count:0 (CROSSING)
;; lr out 6 [bp] 7 [sp] 16 [argp] 20 [frame]
;; live out 6 [bp] 7 [sp] 20 [frame]
so the fact that ax and dx need to be live on the edge from bb 311 to bb 290 is
not visible to DF and if cross-jumping decides to cross-jump bb 289 to 290, DF
will think the ax/dx registers are artificially generated at the start of that
bb, which is the case when arriving there from the EH edges, but not the case
when arriving there from other edges.
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Subject: [Bug target/86155] std::thread
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RJE <rebel at ameritech dot net> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from RJE <rebel at ameritech dot net> ---
Compilers Build on my machine wont build executable code
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Subject: [Bug c/86093] [8/9 Regression] volatile ignored on pointer in C
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |jakub at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r255021.
genmatch emits all checks as x == y || operand_equal_p (x, y, 0), the reason
why e.g.
long volatile i;
long foo (void) { return i - i; }
isn't optimized into 0 is that we actually wrap i into a NOP_EXPR to remove
quals and only do MINUS_EXPR on the result of those NOP_EXPRs, which don't
compare equal as pointers. So I think we should just do the same with
POINTER_DIFF_EXPR, cast the operands to unqualified pointers.
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Subject: [Bug c/86093] [8/9 Regression] volatile ignored on pointer in C
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44284
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44284&action=edit
gcc9-pr86093.patch
Untested fix.
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Subject: [Bug fortran/85701] [openacc] ICE in mark_scope_block_unused, at tree-ssa-live.c:364
Date: Fri, 15 Jun 2018 13:59:00 -0000
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--- Comment #5 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Fri Jun 15 13:59:14 2018
New Revision: 261629
URL: https://gcc.gnu.org/viewcvs?rev=261629&root=gcc&view=rev
Log:
PR fortran/85701
Backport from mainline
2018-06-05 Cesar Philippidis <cesar@codesourcery.com>
PR fortran/85701
gcc/fortran/
* openmp.c (gfc_resolve_oacc_declare): Error on functions and
subroutine data clause arguments.
gcc/testsuite/
* gfortran.dg/goacc/pr85701.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/goacc/pr85701.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/openmp.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/86166] New: ICE in convert_move, at expr.c:299 on aarch64-linux-gnu
Date: Fri, 15 Jun 2018 13:59:00 -0000
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Bug ID: 86166
Summary: ICE in convert_move, at expr.c:299 on
aarch64-linux-gnu
Product: gcc
Version: 6.4.1
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seen with 5.5.0 and the gcc-6-branch on aarch64-linux-gnu, works with newer
versions
$ cat Transform.c
typedef unsigned short a;
# 0 "" 3
__attribute__((__vector_size__(4 * sizeof(a)))) a b;
c() { b = b << 8 | b >> 8; }
$ aarch64-linux-gnu-gcc-6 -c Transform.c
: In function 'c':
:1:18: internal compiler error: in convert_move, at expr.c:299
Please submit a full bug report,
with preprocessed source if appropriate.
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Subject: [Bug fortran/85702] [openacc] ICE in gfc_format_decoder, at fortran/error.c:943
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--- Comment #4 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Fri Jun 15 14:01:00 2018
New Revision: 261630
URL: https://gcc.gnu.org/viewcvs?rev=261630&root=gcc&view=rev
Log:
PR fortran/85702
Backport from mainline
2018-06-13 Cesar Philippidis <cesar@codesourcery.com>
PR fortran/85702
gcc/fortran/
* openmp.c (gfc_match_oacc_wait): Use %C to report error location.
gcc/testsuite/
* gfortran.dg/goacc/pr85702.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/goacc/pr85702.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/openmp.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/86139] [7 Regression] ICE in in store_constructor, at expr.c:6849 on arm-linux-gnueabihf
Date: Fri, 15 Jun 2018 14:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86139
Matthias Klose <doko at debian dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|arm-linux-gnueabihf, |arm-linux-gnueabihf
|aarch64-linux-gnu |
Summary|[7 Regression] ICE in in |[7 Regression] ICE in in
|store_constructor, at |store_constructor, at
|expr.c:6849 on |expr.c:6849 on
|aarch64-linux-gnu and |arm-linux-gnueabihf
|arm-linux-gnueabihf |
--- Comment #6 from Matthias Klose <doko at debian dot org> ---
not seen on aarch64, different issue reported as PR86166.
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Subject: [Bug target/85945] [6/7 Regression] ICE in resolve_subreg_use, at lower-subreg.c:751
Date: Fri, 15 Jun 2018 14:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7/8/9 Regression] ICE in |[6/7 Regression] ICE in
|resolve_subreg_use, at |resolve_subreg_use, at
|lower-subreg.c:751 |lower-subreg.c:751
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.2+ so far.
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Subject: [Bug fortran/85703] [openacc] ICE in resolve_fntype, at fortran/resolve.c:16313
Date: Fri, 15 Jun 2018 14:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85703
--- Comment #6 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Fri Jun 15 14:03:00 2018
New Revision: 261631
URL: https://gcc.gnu.org/viewcvs?rev=261631&root=gcc&view=rev
Log:
PR fortran/85703
Backport from mainline
2018-06-13 Cesar Philippidis <cesar@codesourcery.com>
PR fortran/85703
gcc/fortran/
* parse.c (decode_oacc_directive): Set gfc_matching_function
to false.
(decode_omp_directive): Likewise.
gcc/testsuite/
* gfortran.dg/goacc/pr85703.f90: New test.
* gfortran.dg/gomp/pr85703.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/goacc/pr85703.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/gomp/pr85703.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/parse.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/86019] [8/9 Regression] Unref implementation using atomic_thread_fence generates worse code on x86-64 in gcc 8.1 than 7.3
Date: Fri, 15 Jun 2018 14:12:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-15
CC| |amonakov at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This broke with r251377 aka PR80640 fix.
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Subject: [Bug middle-end/86166] ICE in convert_move, at expr.c:299 on aarch64-linux-gnu
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |ktkachov at gcc dot gnu.org
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--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed with GCC 5 and 6 branches.
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From: "simon.kluepfel at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/86167] New: allocation variable length character array in derived type incorrect
Date: Fri, 15 Jun 2018 14:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86167
Bug ID: 86167
Summary: allocation variable length character array in derived
type incorrect
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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Created attachment 44285
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44285&action=edit
main.f03
Allocation of a member of the form
type a
character(len=:),dimension(:),allocatable :: a1
end type a
is not handled correctly.
---8<---
program main
implicit none
type a
character(len=:),dimension(:),allocatable :: a1
end type a
character(len=:),dimension(:),allocatable :: a1,a2
type(a) :: ta
type(a) :: tb
allocate(character(len=2) :: a1(2))
allocate(a2,source=a1)
allocate(character(len=2) :: ta%a1(2))
allocate(tb%a1,source=a2)
write(*,*) size(a1),len(a1),len(a1(1))
write(*,*) size(a2),len(a2),len(a1(1))
write(*,*) size(ta%a1),len(ta%a1),len(ta%a1(1))
write(*,*) size(tb%a1),len(tb%a1),len(tb%a1(1))
end program main
---8<---
$ ./a.out
2 2 2
2 2 2
2 0 2
2 0 2
the last two lines should be all 2's
gcc version 8.1.0 (Debian 8.1.0-5)
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Subject: [Bug c/82013] better error message for missing semicolon in prototype
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
Changing status to ASSIGNED because David marked himself as the assignee.
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Subject: [Bug middle-end/85878] [6/7/8/9 Regression] ICE in convert_mode_scalar, at expr.c:287
Date: Fri, 15 Jun 2018 14:55:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44286
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44286&action=edit
gcc9-pr85878.patch
Untested fix.
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Subject: [Bug c/16351] NULL dereference warnings
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--- Comment #57 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #56)
> I'd say any warning option with more than just a handful of pr's against it
> would benefit from having a meta-bug.
On second thought I think actually a meta-bug for -Wnull-dereference should be
a new, separate bug. There's a large cc-list for this bug and making it a
meta-bug would result in everyone on it getting way more emails than they
signed up for. So, with a new, separate meta-bug for remaining issues with
-Wnull-dereference, would it be okay to close this one?
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Subject: [Bug target/85860] [8/9 Regression] ICE: in lra_split_hard_reg_for, at lra-assigns.c:1810: unable to find a register to spill with -flive-range-shrinkage -mbmi2
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-15
CC| |jakub at gcc dot gnu.org,
| |vmakarov at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r257751.
>From gcc-bugs-return-607341-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 15:19:32 2018
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Subject: [Bug libstdc++/86168] New: [9 regression] libstdc++ tests fail with error: call of overloaded 'random_device()' is ambiguous
Date: Fri, 15 Jun 2018 15:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86168
Bug ID: 86168
Summary: [9 regression] libstdc++ tests fail with error: call
of overloaded 'random_device()' is ambiguous
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
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Reporter: wilco at gcc dot gnu.org
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New failures:
FAIL: 25_algorithms/make_heap/complexity.cc (test for excess errors)
FAIL: 25_algorithms/pop_heap/complexity.cc (test for excess errors)
FAIL: 25_algorithms/push_heap/complexity.cc (test for excess errors)
FAIL: 25_algorithms/sort_heap/complexity.cc (test for excess errors)
FAIL: 26_numerics/random/random_device/cons/default.cc (test for excess errors)
FAIL: experimental/random/randint.cc (test for excess errors)
Typical output is:
build/build-aarch64-none-elf/obj/gcc2/aarch64-none-elf/libstdc++-v3/include/experimental/random:45:
error: call of overloaded 'random_device(<brace-enclosed initializer list>)' is
ambiguous
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Subject: [Bug c/84195] newlines in deprecated diagnostics
Date: Fri, 15 Jun 2018 15:26:00 -0000
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--- Comment #4 from Nick Clifton <nickc at gcc dot gnu.org> ---
Author: nickc
Date: Fri Jun 15 15:25:16 2018
New Revision: 261633
URL: https://gcc.gnu.org/viewcvs?rev=261633&root=gcc&view=rev
Log:
Force user provided warning and error messages to only occupy one line.
PR 84195
gcc: * tree.c (escaped_string): New class. Converts an unescaped
string into its escaped equivalent.
(warn_deprecated_use): Use the new class to convert the
deprecation message, if present.
(test_escaped_strings): New self test.
(test_c_tests): Add test_escaped_strings.
* doc/extend.texi (deprecated): Add a note that the
deprecation message is affected by the -fmessage-length
option, and that control characters will be escaped.
(#pragma GCC error): Document this pragma.
(#pragma GCC warning): Likewise.
* doc/invoke.texi (-fmessage-length): Document this option's
effect on the #warning and #error preprocessor directives and
the deprecated attribute.
testsuite;
* gcc.c-torture/compile/pr84195.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr84195.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/extend.texi
trunk/gcc/doc/invoke.texi
trunk/gcc/testsuite/ChangeLog
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Nick Clifton <nickc at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Nick Clifton <nickc at gcc dot gnu.org> ---
A revised form of the patch has now been apoplied.
>From gcc-bugs-return-607344-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 16:06:51 2018
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Subject: [Bug target/86155] std::thread
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Resolution|WONTFIX |INVALID
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Then I think "INVALID" is the right resolution. Thanks for the follow-up.
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Subject: [Bug libstdc++/86168] [9 regression] libstdc++ tests fail with error: call of overloaded 'random_device()' is ambiguous
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-15
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
My fault, patch on the way ...
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Subject: [Bug libstdc++/86168] [9 regression] libstdc++ tests fail with error: call of overloaded 'random_device()' is ambiguous
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Jun 15 16:11:12 2018
New Revision: 261636
URL: https://gcc.gnu.org/viewcvs?rev=261636&root=gcc&view=rev
Log:
PR libstdc++/86168 fix ambiguous default constructor
PR libstdc++/86168
* include/bits/random.h (random_device(const string&)): Remove
default argument.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/random.h
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Subject: [Bug libstdc++/86168] [9 regression] libstdc++ tests fail with error: call of overloaded 'random_device()' is ambiguous
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Should be fixed at r261635
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86169] New: .data() fails to unshare strings
Date: Fri, 15 Jun 2018 16:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86169
Bug ID: 86169
Summary: .data() fails to unshare strings
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: mpolacek at gcc dot gnu.org
Target Milestone: ---
#include <string>
int main()
{
const std::string s0{"hello world"};
std::string s1 {s0};
std::string s2 {s0};
char* p = s1.data();
*p = ' ';
if (s0.compare ("hello world") != 0)
__builtin_abort ();
if (s2.compare ("hello world") != 0)
__builtin_abort ();
return 0;
}
$ g++ a.cpp -std=c++17 -D_GLIBCXX_USE_CXX11_ABI=1; ./a.out
$ g++ a.cpp -std=c++17 -D_GLIBCXX_USE_CXX11_ABI=0; ./a.out
Aborted (core dumped)
>From gcc-bugs-return-607349-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 16:42:31 2018
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Subject: [Bug libstdc++/86169] .data() fails to unshare strings
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-607350-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 16:46:09 2018
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Subject: [Bug c++/82882] [8 regression] ICE Segmentation fault
Date: Fri, 15 Jun 2018 16:46:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #12 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Did you file a new PR?
>From gcc-bugs-return-607351-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 16:50:43 2018
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80485] rejects-valid: constexpr static_cast of pointer-to-member-function to bool
Date: Fri, 15 Jun 2018 16:50:00 -0000
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Tony E Lewis from comment #5)
> Thanks to all for all work on this.
>
> (Apologies if this isn't helpful but just in case it is...) I notice that
> the original Godbolt snippet ( https://godbolt.org/g/JnrZss ) has regressed
> from a rejects-valid in 8.1 to an ICE on trunk ("9.0.0 20180610") :
I don't see that. This compiles fine with trunk:
struct dummy {
void nonnull() {};
};
typedef void (dummy::*safe_bool)();
constexpr safe_bool a = &dummy::nonnull;
static_assert( static_cast<bool>( a ), "" );
int main () { return 0; }
>From gcc-bugs-return-607352-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 17:41:37 2018
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Subject: [Bug c/86134] earlier diagnostic causes followup diagnostic about unknown -Wno-* options
Date: Fri, 15 Jun 2018 17:41:00 -0000
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--- Comment #9 from Manuel López-Ibáñez <lopezibanez at gmail dot com> ---
That makes sense as well. Adding further logic to silence the warning or to
make the warning not become an error is what I think is a bad idea. I like
also your more explicit wording.
>From gcc-bugs-return-607353-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 18:02:17 2018
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Subject: [Bug bootstrap/60160] Building with -flto in CFLAGS_FOR_TARGET / CXXFLAGS_FOR_TARGET
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
This came up on gcc-help, which I'll take as confirmation:
https://gcc.gnu.org/ml/gcc-help/2018-06/msg00060.html
>From gcc-bugs-return-607354-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 18:05:18 2018
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Subject: [Bug lto/48200] linking shared library with LTO results in different exported symbols
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=57703
--- Comment #24 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #16)
> (In reply to Xi Ruoyao from comment #15)
> > (In reply to Jan Hubicka from comment #13)
> > > Concerning comment #11, if you have toplevel asms you need to disable LTO
> > > for that unit, as there is no way to tell for gcc what the asm statement is
> > > doing. Perhaps attribute would be better way to do this?
> >
> > Well then this is PR 57703. Should we mark duplicate? :(
>
> I think the bug is sufficiently different and should have different
> workarounds.
>
Still worth putting under "See Also" at least...
>From gcc-bugs-return-607355-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 18:26:05 2018
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Subject: [Bug target/34484] libgcc should check if feclearexcept (and others) available for BID support on uclibc
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #13 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #9)
> DFP needs floating point exception support. If your C library doesn't
> support it, you can disable DFP.
Are you planning on staying the Assignee for this, H.J.?
>From gcc-bugs-return-607356-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 18:29:07 2018
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Subject: [Bug other/49194] Trivially stupid inlining decisions
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----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #9 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #8)
> GCC 4.7 has now shrink wrapping that should reduce effect of inlining large
> cold functions called once. Realistic testcases where we still kill code
> quality would be welcome.
>
> I tested patch to disable inlining once for cold calls, but it does not help
> in general. What happens is that we stop inlining
> constructors/destructors/initialization loops that eventually kills code
> quality of some benchmarks since known values are no longer propagated. I
> will do more tunning of this for 4.8.
>
> Honza
So are you still working on this then?
>From gcc-bugs-return-607357-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 18:30:50 2018
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Subject: [Bug testsuite/86170] New: New test case gcc.c-torture/compile/pr84195.c added in r261633 fails
Date: Fri, 15 Jun 2018 18:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86170
Bug ID: 86170
Summary: New test case gcc.c-torture/compile/pr84195.c added in
r261633 fails
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
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Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
make -k check-gcc RUNTESTFLAGS=compile.exp=gcc.c-torture/compile/pr84195.c
. . .
# of unexpected failures 14
FAIL: gcc.c-torture/compile/pr84195.c -O0 (test for warnings, line 15)
FAIL: gcc.c-torture/compile/pr84195.c -O0 (test for excess errors)
FAIL: gcc.c-torture/compile/pr84195.c -O1 (test for warnings, line 15)
FAIL: gcc.c-torture/compile/pr84195.c -O1 (test for excess errors)
FAIL: gcc.c-torture/compile/pr84195.c -O2 (test for warnings, line 15)
FAIL: gcc.c-torture/compile/pr84195.c -O2 (test for excess errors)
FAIL: gcc.c-torture/compile/pr84195.c -O3 -g (test for warnings, line 15)
FAIL: gcc.c-torture/compile/pr84195.c -O3 -g (test for excess errors)
FAIL: gcc.c-torture/compile/pr84195.c -Os (test for warnings, line 15)
FAIL: gcc.c-torture/compile/pr84195.c -Os (test for excess errors)
FAIL: gcc.c-torture/compile/pr84195.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none (test for warnings, line 15)
FAIL: gcc.c-torture/compile/pr84195.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none (test for excess errors)
FAIL: gcc.c-torture/compile/pr84195.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects (test for warnings, line 15)
FAIL: gcc.c-torture/compile/pr84195.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects (test for excess errors)
The excess warnings all seem to be this:
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.c-torture/compile/pr84195.c:13:12:
note: declared here
FAIL: gcc.c-torture/compile/pr84195.c -O0 (test for warnings, line 15)
FAIL: gcc.c-torture/compile/pr84195.c -O0 (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.c-torture/compile/pr84195.c:15:3:
warning: 'i' is deprecated: foo
bar [-Wdeprecated-declarations]
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Subject: [Bug target/34484] libgcc should check if feclearexcept (and others) available for BID support on uclibc
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|hjl.tools at gmail dot com |unassigned at gcc dot gnu.org
--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> ---
Unassign myself.
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Subject: [Bug libstdc++/86169] .data() fails to unshare strings
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86169
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Jun 15 18:47:29 2018
New Revision: 261642
URL: https://gcc.gnu.org/viewcvs?rev=261642&root=gcc&view=rev
Log:
PR libstdc++/86169 unshare COW string when non-const data() called
PR libstdc++/86169
* include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
(basic_string::data()): Unshare string.
* testsuite/21_strings/basic_string/operations/data/char/86169.cc:
New.
Added:
trunk/libstdc++-v3/testsuite/21_strings/basic_string/operations/data/char/86169.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/basic_string.h
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Subject: [Bug libstdc++/86169] .data() fails to unshare strings
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Jun 15 19:01:39 2018
New Revision: 261644
URL: https://gcc.gnu.org/viewcvs?rev=261644&root=gcc&view=rev
Log:
PR libstdc++/86169 unshare COW string when non-const data() called
PR libstdc++/86169
* include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
(basic_string::data()): Unshare string.
* testsuite/21_strings/basic_string/operations/data/char/86169.cc:
New.
Added:
branches/gcc-8-branch/libstdc++-v3/testsuite/21_strings/basic_string/operations/data/char/86169.cc
Modified:
branches/gcc-8-branch/libstdc++-v3/ChangeLog
branches/gcc-8-branch/libstdc++-v3/include/bits/basic_string.h
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Subject: [Bug libstdc++/86169] .data() fails to unshare strings
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Jun 15 19:19:04 2018
New Revision: 261646
URL: https://gcc.gnu.org/viewcvs?rev=261646&root=gcc&view=rev
Log:
PR libstdc++/86169 unshare COW string when non-const data() called
PR libstdc++/86169
* include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
(basic_string::data()): Unshare string.
* testsuite/21_strings/basic_string/operations/data/char/86169.cc:
New.
Added:
branches/gcc-7-branch/libstdc++-v3/testsuite/21_strings/basic_string/operations/data/char/86169.cc
Modified:
branches/gcc-7-branch/libstdc++-v3/ChangeLog
branches/gcc-7-branch/libstdc++-v3/include/bits/basic_string.h
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Subject: [Bug libstdc++/86169] .data() fails to unshare strings
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Status|ASSIGNED |RESOLVED
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 7.4, 8.2 and 9.0
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Subject: [Bug middle-end/86123] [8/9 Regression] ICE in prepare_cmp_insn, at optabs.c:3967
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Jun 15 19:30:58 2018
New Revision: 261647
URL: https://gcc.gnu.org/viewcvs?rev=261647&root=gcc&view=rev
Log:
PR middle-end/86123
* match.pd ((X / Y) == 0 -> X < Y): Don't transform complex divisions.
Fix up comment formatting.
* gcc.c-torture/compile/pr86123.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr86123.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/86123] [8/9 Regression] ICE in prepare_cmp_insn, at optabs.c:3967
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86123
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Jun 15 19:34:11 2018
New Revision: 261648
URL: https://gcc.gnu.org/viewcvs?rev=261648&root=gcc&view=rev
Log:
PR middle-end/86123
* match.pd ((X / Y) == 0 -> X < Y): Don't transform complex divisions.
Fix up comment formatting.
* gcc.c-torture/compile/pr86123.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.c-torture/compile/pr86123.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/match.pd
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/86123] [8/9 Regression] ICE in prepare_cmp_insn, at optabs.c:3967
Date: Fri, 15 Jun 2018 19:35:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.2+.
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Subject: [Bug c/86134] earlier diagnostic causes followup diagnostic about unknown -Wno-* options
Date: Fri, 15 Jun 2018 20:11:00 -0000
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--- Comment #10 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Fri, 15 Jun 2018, rguenth at gcc dot gnu.org wrote:
> Joseph, do you agree that the following shouldn't fail the compilation?
>
> > echo 'int main(){}' | gcc -S -x c -Wno-unknown-warning-option -Wall -Werror -Wno-error=return-type -
> <stdin>: In function ‘main’:
> <stdin>:1:1: warning: control reaches end of non-void function [-Wreturn-type]
> <stdin>: At top level:
> cc1: error: unrecognized command line option "-Wno-unknown-warning-option"
> [-Werror]
> cc1: all warnings being treated as errors
Yes.
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Subject: [Bug c++/82882] [8 regression] ICE Segmentation fault
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--- Comment #13 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Jun 15 20:22:44 2018
New Revision: 261654
URL: https://gcc.gnu.org/viewcvs?rev=261654&root=gcc&view=rev
Log:
PR c++/82882 - ICE with lambda in template default argument.
* lambda.c (record_null_lambda_scope): New.
* pt.c (tsubst_lambda_expr): Use it.
* name-lookup.c (do_pushtag): Don't give a lambda DECL_CONTEXT of a
function that isn't open.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-defarg8.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/lambda.c
trunk/gcc/cp/name-lookup.c
trunk/gcc/cp/pt.c
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Subject: [Bug c++/82882] [8 regression] ICE Segmentation fault
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--- Comment #14 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Jun 15 20:23:13 2018
New Revision: 261658
URL: https://gcc.gnu.org/viewcvs?rev=261658&root=gcc&view=rev
Log:
PR c++/82882 - ICE with lambda in template default argument.
* lambda.c (record_null_lambda_scope): New.
* pt.c (tsubst_lambda_expr): Use it.
* name-lookup.c (do_pushtag): Don't give a lambda DECL_CONTEXT of a
function that isn't open.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-defarg8.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/cp-tree.h
branches/gcc-8-branch/gcc/cp/lambda.c
branches/gcc-8-branch/gcc/cp/name-lookup.c
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Subject: [Bug c++/82882] [8 regression] ICE Segmentation fault
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--- Comment #15 from Jason Merrill <jason at gcc dot gnu.org> ---
A new testcase would have been good, but those testcases are also fixed, now.
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Subject: [Bug c++/82882] [8 regression] ICE Segmentation fault
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--- Comment #16 from Jason Merrill <jason at gcc dot gnu.org> ---
Er, a new PR.
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/85961] scratch register rsi used after function call
Date: Fri, 15 Jun 2018 20:29:00 -0000
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--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Fri, 15 Jun 2018, rguenth at gcc dot gnu.org wrote:
> So - all process_options () option post-processing should go away and be moved
> to finish_options ()?
I think reducing the amount done in process_options makes sense, yes
(watch out for any interations with lang_hooks.post_options or
targetm.target_option.override if you move anything to be executed before
the calls to those hooks).
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/85878] [6/7/8/9 Regression] ICE in convert_mode_scalar, at expr.c:287
Date: Fri, 15 Jun 2018 20:37:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Jun 15 20:36:38 2018
New Revision: 261659
URL: https://gcc.gnu.org/viewcvs?rev=261659&root=gcc&view=rev
Log:
PR middle-end/85878
* expr.c (expand_assignment): Remove now redundant COMPLEX_MODE_P
check from first store_expr, use to_mode instead of GET_MODE (to_rtx).
Only call store_expr for halves if the mode is the same.
* gfortran.fortran-torture/compile/pr85878.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.fortran-torture/compile/pr85878.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/85878] [6/7/8/9 Regression] ICE in convert_mode_scalar, at expr.c:287
Date: Fri, 15 Jun 2018 20:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85878
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Jun 15 20:37:46 2018
New Revision: 261660
URL: https://gcc.gnu.org/viewcvs?rev=261660&root=gcc&view=rev
Log:
PR middle-end/85878
* expr.c (expand_assignment): Remove now redundant COMPLEX_MODE_P
check from first store_expr, use to_mode instead of GET_MODE (to_rtx).
Only call store_expr for halves if the mode is the same.
* gfortran.fortran-torture/compile/pr85878.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.fortran-torture/compile/pr85878.f90
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/expr.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86093] [8/9 Regression] volatile ignored on pointer in C
Date: Fri, 15 Jun 2018 20:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86093
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Jun 15 20:53:54 2018
New Revision: 261663
URL: https://gcc.gnu.org/viewcvs?rev=261663&root=gcc&view=rev
Log:
PR c/86093
* c-typeck.c (pointer_diff): Cast both pointers to unqualified types
before doing POINTER_DIFF_EXPR.
* c-c++-common/pr86093.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/pr86093.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-typeck.c
trunk/gcc/testsuite/ChangeLog
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86147] [8/9 Regression] Lambda is capturing a non-ODR-used constexpr
Date: Fri, 15 Jun 2018 21:00:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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>From gcc-bugs-return-607376-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jun 15 22:30:03 2018
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From: "helloqirun at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86171] New: g++ ICE on valid code: tree check: expected var_decl or function_decl, have type_decl in duplicate_decls, at cp/decl.c:2291
Date: Fri, 15 Jun 2018 22:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86171
Bug ID: 86171
Summary: g++ ICE on valid code: tree check: expected var_decl
or function_decl, have type_decl in duplicate_decls,
at cp/decl.c:2291
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: helloqirun at gmail dot com
Target Milestone: ---
It appears to be a recent regression.
g++-8.1 compiles. g++-4.8 also compiles with "-std=c++11"
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 9.0.0 20180615 (experimental) [trunk revision 261626] (GCC)
$ g++-trunk abc.c
abc.c: In substitution of ‘template<class T> using B = typename A::A [with T =
short int]’:
abc.c:4:8: required from here
abc.c:2:46: internal compiler error: tree check: expected var_decl or
function_decl, have type_decl in duplicate_decls, at cp/decl.c:2291
template <class T> using B = typename A<T>::A;
^
0x78a200 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc/gcc/tree.c:9336
0x88f372 tree_check2(tree_node*, char const*, int, char const*, tree_code,
tree_code)
../../gcc/gcc/tree.h:3136
0x88f372 duplicate_decls(tree_node*, tree_node*, bool)
../../gcc/gcc/cp/decl.c:2291
0x951389 register_specialization
../../gcc/gcc/cp/pt.c:1625
0x96a81e tsubst_decl
../../gcc/gcc/cp/pt.c:13778
0x95efe7 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/gcc/cp/pt.c:14193
0x97b7f2 instantiate_template_1
../../gcc/gcc/cp/pt.c:19234
0x97b7f2 instantiate_template(tree_node*, tree_node*, int)
../../gcc/gcc/cp/pt.c:19290
0x95f38b instantiate_alias_template
../../gcc/gcc/cp/pt.c:19314
0x95f38b tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/gcc/cp/pt.c:14220
0x970637 lookup_template_class_1
../../gcc/gcc/cp/pt.c:9391
0x970637 lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
../../gcc/gcc/cp/pt.c:9646
0x9a069d finish_template_type(tree_node*, tree_node*, int)
../../gcc/gcc/cp/semantics.c:3240
0x91e0a4 cp_parser_template_id
../../gcc/gcc/cp/parser.c:15943
0x91e1a8 cp_parser_class_name
../../gcc/gcc/cp/parser.c:22478
0x92a90f cp_parser_qualifying_entity
../../gcc/gcc/cp/parser.c:6564
0x92a90f cp_parser_nested_name_specifier_opt
../../gcc/gcc/cp/parser.c:6250
0x933509 cp_parser_constructor_declarator_p
../../gcc/gcc/cp/parser.c:26629
0x933509 cp_parser_decl_specifier_seq
../../gcc/gcc/cp/parser.c:13694
0x938c7f cp_parser_simple_declaration
../../gcc/gcc/cp/parser.c:13015
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ cat abc.c
template <class> struct A;
template <class T> using B = typename A<T>::A;
template <class T> struct A { typedef B<T> U; };
B<short> b;
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/16351] NULL dereference warnings
Date: Fri, 15 Jun 2018 22:34:00 -0000
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--- Comment #58 from Martin Sebor <msebor at gcc dot gnu.org> ---
It's fine with me, just as long as we don't lose track of any outstanding bugs.
>From gcc-bugs-return-607378-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 01:31:40 2018
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Subject: [Bug middle-end/77432] warn about null check after pointer dereference
Date: Sat, 16 Jun 2018 01:31:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=77425,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=77421,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=16351
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> Hmm, there was a warning for this specific thing, I thought but I could be
> wrong. Maybe it only happens with optimization.
>
> Oh that is -Wnull-dereference which is slightly different, this case is when
> eliminating the conditional due to dereferencing rather than having a path
> which might deference a null pointer.
They could still be grouped under the same flag though.
>From gcc-bugs-return-607379-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 01:36:13 2018
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Subject: [Bug middle-end/86172] New: [meta-bug] issues with -Wnull-dereference
Date: Sat, 16 Jun 2018 01:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86172
Bug ID: 86172
Summary: [meta-bug] issues with -Wnull-dereference
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: diagnostic, meta-bug
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: egallager at gcc dot gnu.org
Depends on: 71157, 77432, 84316, 84315
Target Milestone: ---
Split off from bug 16351
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71157
[Bug 71157] -Wnull-dereference false alarm in wrong function
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77432
[Bug 77432] warn about null check after pointer dereference
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84315
[Bug 84315] missing -Wnonnull for trivial null pointer dereference
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84316
[Bug 84316] missing -Wnull-dereference on a variable null array reference with
LTO
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Subject: [Bug c/16351] NULL dereference warnings
Date: Sat, 16 Jun 2018 01:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16351
Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #59 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #58)
> It's fine with me, just as long as we don't lose track of any outstanding
> bugs.
The meta-bug is now bug 86172; closing this one.
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Subject: [Bug c++/86147] [8/9 Regression] Lambda is capturing a non-ODR-used constexpr
Date: Sat, 16 Jun 2018 06:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86147
--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Sat Jun 16 06:35:53 2018
New Revision: 261676
URL: https://gcc.gnu.org/viewcvs?rev=261676&root=gcc&view=rev
Log:
PR c++/86147 - wrong capture for template argument.
* expr.c (mark_use): Look through NOP_EXPR.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-const9.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/expr.c
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Subject: [Bug c++/86147] [8/9 Regression] Lambda is capturing a non-ODR-used constexpr
Date: Sat, 16 Jun 2018 06:36:00 -0000
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Sat Jun 16 06:36:19 2018
New Revision: 261677
URL: https://gcc.gnu.org/viewcvs?rev=261677&root=gcc&view=rev
Log:
PR c++/86147 - wrong capture for template argument.
* expr.c (mark_use): Look through NOP_EXPR.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-const9.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/expr.c
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Subject: [Bug c++/86147] [8/9 Regression] Lambda is capturing a non-ODR-used constexpr
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--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Sat Jun 16 06:35:53 2018
New Revision: 261676
URL: https://gcc.gnu.org/viewcvs?rev=261676&root=gcc&view=rev
Log:
PR c++/86147 - wrong capture for template argument.
* expr.c (mark_use): Look through NOP_EXPR.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-const9.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/expr.c
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Sat Jun 16 06:36:19 2018
New Revision: 261677
URL: https://gcc.gnu.org/viewcvs?rev=261677&root=gcc&view=rev
Log:
PR c++/86147 - wrong capture for template argument.
* expr.c (mark_use): Look through NOP_EXPR.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-const9.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/expr.c
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Subject: [Bug rtl-optimization/86108] [8/9 Regression] crash during unwinding with -O2
Date: Sat, 16 Jun 2018 06:51:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Jun 16 06:50:31 2018
New Revision: 261678
URL: https://gcc.gnu.org/viewcvs?rev=261678&root=gcc&view=rev
Log:
PR rtl-optimization/86108
* bb-reorder.c (create_forwarder_block): Renamed to ...
(create_eh_forwarder_block): ... this. Split OLD_BB after labels and
jump from new landing pad to the second part.
(sjlj_fix_up_crossing_landing_pad, dw2_fix_up_crossing_landing_pad):
Adjust callers.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/bb-reorder.c
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Subject: [Bug middle-end/86095] [8/9 Regression] documentation for -Wunsafe-loop-optimizations references options which have no effect any more
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Jun 16 06:51:32 2018
New Revision: 261679
URL: https://gcc.gnu.org/viewcvs?rev=261679&root=gcc&view=rev
Log:
PR middle-end/86095
* common.opt (Wunsafe-loop-optimizations): Add Ignore, remove Var,
documented as preserved for backward compatibility only.
* doc/invoke.texi: Remove -Wunsafe-loop-optimizations documentation.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/common.opt
trunk/gcc/doc/invoke.texi
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Subject: [Bug middle-end/86095] [8/9 Regression] documentation for -Wunsafe-loop-optimizations references options which have no effect any more
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Jun 16 06:52:17 2018
New Revision: 261680
URL: https://gcc.gnu.org/viewcvs?rev=261680&root=gcc&view=rev
Log:
PR middle-end/86095
* common.opt (Wunsafe-loop-optimizations): Add Ignore, remove Var,
documented as preserved for backward compatibility only.
* doc/invoke.texi: Remove -Wunsafe-loop-optimizations documentation.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/common.opt
branches/gcc-8-branch/gcc/doc/invoke.texi
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Subject: [Bug middle-end/86095] [8/9 Regression] documentation for -Wunsafe-loop-optimizations references options which have no effect any more
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.2+.
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86173] New: Default construction of a union (in std::optional)
Date: Sat, 16 Jun 2018 09:59:00 -0000
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Bug ID: 86173
Summary: Default construction of a union (in std::optional)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: glisse at gcc dot gnu.org
Target Milestone: ---
Default construction of std::optional<A> always starts with a memset of the
whole optional to 0, while it doesn't with clang using the same libstdc++.
#include <optional>
struct AA {
double a[1024];
#ifndef TRIVIAL
AA(); AA(AA const&); AA& operator=(AA const&); ~AA();
#endif
};
typedef std::optional<AA> O;
// O fff(){ return {}; }
O fff(){ O o; return o; }
The .original dump has
*<retval> = {.D.34926={._M_payload={.D.34026={._M_empty={}}, ._M_engaged=0}}}
which looks good, it says it is initializing the small _M_empty part of the
union, but the gimple dump has
*<retval> = {};
which eagerly zeroes everything.
>From gcc-bugs-return-607389-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 10:07:59 2018
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Subject: [Bug libstdc++/80335] perf of copying std::optional<trivial>
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
Looks like this is fixed. Although the limitations discussed are present:
optional<array<double,1024>> copies the whole array even if it is never
engaged.
>From gcc-bugs-return-607390-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 10:08:39 2018
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Subject: [Bug c++/86173] Default construction of a union (in std::optional)
Date: Sat, 16 Jun 2018 10:08:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Note that constructing optional from std::nullopt does avoid the memset.
>From gcc-bugs-return-607391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 11:27:07 2018
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Subject: [Bug c++/86171] [6/7/8/9 Regression] g++ ICE on valid code: tree check: expected var_decl or function_decl, have type_decl in duplicate_decls, at cp/decl.c:2291
Date: Sat, 16 Jun 2018 11:27:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Version|unknown |9.0
Keywords| |ice-checking
Last reconfirmed| |2018-06-16
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
Summary|g++ ICE on valid code: |[6/7/8/9 Regression] g++
|tree check: expected |ICE on valid code: tree
|var_decl or function_decl, |check: expected var_decl or
|have type_decl in |function_decl, have
|duplicate_decls, at |type_decl in
|cp/decl.c:2291 |duplicate_decls, at
| |cp/decl.c:2291
Target Milestone|--- |6.5
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r181118.
>From gcc-bugs-return-607392-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 12:06:49 2018
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Subject: [Bug libstdc++/80335] perf of copying std::optional<trivial>
Date: Sat, 16 Jun 2018 12:06:00 -0000
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--- Comment #3 from sgunderson at bigfoot dot com ---
Appears to have been fixed in GCC 8, indeed.
#include <optional>
std::optional<long> func()
{
return 3;
}
GCC 7 (-O2) compiles to:
0: 48 89 f8 mov %rdi,%rax
3: c7 07 03 00 00 00 movl $0x3,(%rdi)
9: c6 47 04 01 movb $0x1,0x4(%rdi)
d: c3 retq
GCC 8 (-O2):
0: 48 b8 03 00 00 00 01 movabs $0x100000003,%rax
7: 00 00 00
a: c3 retq
This is an ABI break, but I'll happily take it. :-)
>From gcc-bugs-return-607393-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 16:03:57 2018
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Subject: [Bug c/86174] New: Poor vectorization/register allocation with omp simd, FMA
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86174
Bug ID: 86174
Summary: Poor vectorization/register allocation with omp simd,
FMA
Product: gcc
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Created attachment 44287
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44287&action=edit
Source demonstrating poor optimization
The attached code produces lots of needless spills with gcc-8.1 on Linux.
$ gcc -O3 -Wall -march=skylake -ffast-math -fopenmp -c mm-gcc.c
0000000000000080 <mult+0x80> vbroadcastsd ymm2,QWORD PTR [rdx]
0000000000000085 <mult+0x85> vmovupd ymm1,YMMWORD PTR [rcx]
0000000000000089 <mult+0x89> vmovapd ymm0,ymm1
000000000000008d <mult+0x8d> vfmadd213pd ymm0,ymm2,YMMWORD PTR [rsp]
0000000000000093 <mult+0x93> vmovapd YMMWORD PTR [rsp],ymm0
0000000000000098 <mult+0x98> vmovupd ymm0,YMMWORD PTR [rcx+0x20]
000000000000009d <mult+0x9d> vfmadd213pd ymm2,ymm0,YMMWORD PTR [rsp+0x20]
00000000000000a4 <mult+0xa4> vmovapd YMMWORD PTR [rsp+0x20],ymm2
00000000000000aa <mult+0xaa> vbroadcastsd ymm2,QWORD PTR [rdx+0x400]
00000000000000b3 <mult+0xb3> vmovapd ymm3,ymm1
00000000000000b7 <mult+0xb7> vfmadd213pd ymm3,ymm2,YMMWORD PTR [rsp+0x40]
00000000000000be <mult+0xbe> vmovapd YMMWORD PTR [rsp+0x40],ymm3
00000000000000c4 <mult+0xc4> vfmadd213pd ymm2,ymm0,YMMWORD PTR [rsp+0x60]
00000000000000cb <mult+0xcb> vmovapd YMMWORD PTR [rsp+0x60],ymm2
00000000000000d1 <mult+0xd1> vbroadcastsd ymm2,QWORD PTR [rdx+0x800]
00000000000000da <mult+0xda> vmovapd ymm3,ymm1
00000000000000de <mult+0xde> vfmadd213pd ymm3,ymm2,YMMWORD PTR [rsp+0x80]
00000000000000e8 <mult+0xe8> vmovapd YMMWORD PTR [rsp+0x80],ymm3
00000000000000f1 <mult+0xf1> vfmadd213pd ymm2,ymm0,YMMWORD PTR [rsp+0xa0]
00000000000000fb <mult+0xfb> vmovapd YMMWORD PTR [rsp+0xa0],ymm2
0000000000000104 <mult+0x104> vbroadcastsd ymm2,QWORD PTR [rdx+0xc00]
000000000000010d <mult+0x10d> vfmadd213pd ymm1,ymm2,YMMWORD PTR [rsp+0xc0]
0000000000000117 <mult+0x117> vmovapd YMMWORD PTR [rsp+0xc0],ymm1
0000000000000120 <mult+0x120> vfmadd213pd ymm0,ymm2,YMMWORD PTR [rsp+0xe0]
000000000000012a <mult+0x12a> vmovapd YMMWORD PTR [rsp+0xe0],ymm0
0000000000000133 <mult+0x133> add rdx,0x8
0000000000000137 <mult+0x137> add rcx,0x400
000000000000013e <mult+0x13e> cmp rsi,rcx
0000000000000141 <mult+0x141> jne 0000000000000080 <mult+0x80>
GCC does not issue vector instructions if omp simd is removed. In contrast,
clang-6 vectorizes well with or without omp simd:
$ clang -O3 -Wall -march=haswell -ffast-math -c mm-gcc.c
00000000000000e0 <mult+0xe0> vmovapd ymm9,ymm6
00000000000000e4 <mult+0xe4> vbroadcastsd ymm10,QWORD PTR [rdi+rbx*8-0x800]
00000000000000ee <mult+0xee> vmovupd ymm6,YMMWORD PTR [rax-0x20]
00000000000000f3 <mult+0xf3> vmovupd ymm11,YMMWORD PTR [rax]
00000000000000f7 <mult+0xf7> vfmadd231pd ymm1,ymm6,ymm10
00000000000000fc <mult+0xfc> vfmadd231pd ymm7,ymm11,ymm10
0000000000000101 <mult+0x101> vbroadcastsd ymm10,QWORD PTR [rdi+rbx*8-0x400]
000000000000010b <mult+0x10b> vfmadd231pd ymm8,ymm6,ymm10
0000000000000110 <mult+0x110> vfmadd231pd ymm5,ymm11,ymm10
0000000000000115 <mult+0x115> vbroadcastsd ymm10,QWORD PTR [rdi+rbx*8]
000000000000011b <mult+0x11b> vfmadd231pd ymm2,ymm6,ymm10
0000000000000120 <mult+0x120> vfmadd231pd ymm3,ymm11,ymm10
0000000000000125 <mult+0x125> vbroadcastsd ymm10,QWORD PTR [rdi+rbx*8+0x400]
000000000000012f <mult+0x12f> vfmadd213pd ymm6,ymm10,ymm9
0000000000000134 <mult+0x134> vfmadd231pd ymm4,ymm11,ymm10
0000000000000139 <mult+0x139> add rax,0x400
000000000000013f <mult+0x13f> add rbx,0x1
0000000000000143 <mult+0x143> jne 00000000000000e0 <mult+0xe0>
(I used -march=haswell instead of -march=skylake due to
https://bugs.llvm.org/show_bug.cgi?id=37819.)
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Subject: [Bug lto/86175] New: LTO code generator does not respect ld -u option to force symbol inclusion in the link product
Date: Sat, 16 Jun 2018 16:58:00 -0000
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Bug ID: 86175
Summary: LTO code generator does not respect ld -u option to
force symbol inclusion in the link product
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
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Created attachment 44288
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44288&action=edit
Test case to demonstrate bug
Please see test case in attached file that contains
Makefile
test.c
GCC is 8.1.1
ld is from binutils 2.29.1
Compiling with -flto and attempting to force inclusion of a symbol with hidden
visibility. The symbol is discarded.
make
gcc -o test1 -fvisibility=default -ffunction-sections
-Wl,--gc-sections,-u,KeepMe test.c
strings test1 | grep This
This string should appear in the executable.
gcc -o test2 -flto -fvisibility=default -ffunction-sections
-Wl,--gc-sections,-u,KeepMe test.c
strings test2 | grep This
This string should appear in the executable.
gcc -o test3 -fvisibility=hidden -ffunction-sections
-Wl,--gc-sections,-u,KeepMe test.c
strings test3 | grep This
This string should appear in the executable.
gcc -o test4 -flto -fvisibility=hidden -ffunction-sections
-Wl,--gc-sections,-u,KeepMe test.c
strings test4 | grep This
make: [Makefile:18: test4] Error 1 (ignored)
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Subject: [Bug c++/86176] New: Wnull-dereference warning disappears with a call to std::cout on the line after
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86176
Bug ID: 86176
Summary: Wnull-dereference warning disappears with a call to
std::cout on the line after
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
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Hello
Some possible issues. Could you give your opinion please.
1. printf Wnull-dereference warning is only visible with -O2 (not -O0)
2. printf Wnull-dereference warning disappears if I uncomment the std::cout on
line after.
There is bug 86172 but I have not linked it.
note, I also tried g++8.1 x86-64, same results.
g++-8 --version
g++-8 (Ubuntu 8-20180414-1ubuntu2) 8.0.1 20180414 (experimental) [trunk
revision 259383]
jonny@asus:~/code$ g++-8 -O0 -Wall -Wextra -Wnull-dereference -Wpedantic -o
main.o -c main.cpp
jonny@asus:~/code$ g++-8 -O2 -Wall -Wextra -Wnull-dereference -Wpedantic -o
main.o -c main.cpp
main.cpp: In function ‘int main()’:
main.cpp:8:11: warning: null pointer dereference [-Wnull-dereference]
printf("%d\n", *i);
~~~~~~^~~~~~~~~~~~
jonny@asus:~/code$
#include <stdio.h>
#include <iostream>
void f(const int *i)
{
printf("%d\n", *i);
//std::cout << *i;
}
int main () {
f(nullptr);
return 0;
}
>From gcc-bugs-return-607396-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 17:20:19 2018
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Subject: [Bug c++/86177] New: Wnull-dereference warning for object file compile missing
Date: Sat, 16 Jun 2018 17:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86177
Bug ID: 86177
Summary: Wnull-dereference warning for object file compile
missing
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Hello
This doesn't give any warning that the pointer is not checked when being
compiled. If linked with second program example below, there is no issue
visible. Then crashes when runs:
jonny@asus:~/code$ ./main
Segmentation fault (core dumped)
//g++-8 -O2 -Wall -Wextra -Wnull-dereference -Wpedantic -o main -c main.cpp
void f(int *i)
{
*i = 1;
}
//g++-8 -O2 -Wall -Wextra -Wnull-dereference -Wpedantic main1.o -o main
main2.cpp
extern void f(int* i);
int main()
{
f(nullptr);
// return
}
>From gcc-bugs-return-607397-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 17:42:34 2018
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Subject: [Bug c/86174] Poor vectorization/register allocation with omp simd, FMA
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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 #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
It might be useful to note that what the testcase "wants" to happen is for the
compiler to notice that the temporary array 'double C[Si][Sk]' does not need to
live in memory - ideally it would correspond to 8 256-bit (or 4 512-bit)
registers.
>From gcc-bugs-return-607398-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 18:55:59 2018
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Subject: [Bug c++/80485] rejects-valid: constexpr static_cast of pointer-to-member-function to bool
Date: Sat, 16 Jun 2018 18:55:00 -0000
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--- Comment #7 from Tony E Lewis <TonyELewis at hotmail dot com> ---
Ah yes - I'm seeing it compiling cleanly now on Godbolt's trunk (9.0.0
20180615).
Must have been a temporary glitch in the build (and couldn't possibly have been
due to my error :P ).
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Subject: [Bug c++/86177] Wnull-dereference warning for object file compile missing
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--- Comment #1 from Jonny Grant <jg at jguk dot org> ---
If g++ compiles both main.cpp and main2.cpp at the same time (ie no separate
obj file stage) it also doesn't give the expected warning.
jonny@asus:~/code$ g++-8 -O2 -Wall -Wextra -Wnull-dereference -Wpedantic -o
main main2.cpp main.cpp
jonny@asus:~/code$
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Subject: [Bug c/86178] New: No warning when missing return from function main()
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Bug ID: 86178
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Hello, should GCC show an error when "return" is missing from function main()
below ? Maybe I am missing something...
jonny@asus:~/code$ g++ -O2 -Wreturn-type -Wall -Wextra -Wnull-dereference
-Wpedantic -o main main3.cpp
jonny@asus:~/code$
I expected:
In function ‘main’:
warning: control reaches end of non-void function [-Wreturn-type]
//g++-8 -O2 -Wreturn-type -Wall -Wextra -Wnull-dereference -Wpedantic -o main
main3.cpp
#include <stdio.h>
int main(void)
{
printf("hello\n");
// return
}
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Subject: [Bug c/86178] No warning when missing return from function main()
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You've set component=c but you're using g++ which means you're compiling C++
and so there's an implicit "return 0;" from main.
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Subject: [Bug c++/86177] Wnull-dereference warning for object file compile missing
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That's how C++ works. Each translation unit is compiled separately. It's your
job to prevent such errors.
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Subject: [Bug c/86178] No warning when missing return from function main()
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See 4) at http://en.cppreference.com/w/cpp/language/main_function#Explanation
There's also an implicit "return 0;" for C, but only since C99 and only when
the return type of main is compatible with int. See 3) at
http://en.cppreference.com/w/c/language/main_function
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Subject: [Bug middle-end/86172] [meta-bug] issues with -Wnull-dereference
Date: Sat, 16 Jun 2018 20:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86172
Bug 86172 depends on bug 86177, which changed state.
Bug 86177 Summary: Wnull-dereference warning for object file compile missing
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86177
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
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Subject: [Bug c++/86177] Wnull-dereference warning for object file compile missing
Date: Sat, 16 Jun 2018 20:07:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
If you compile with -flto then the link-time optimizations can see across
translation units and give a warning. Otherwise it's impossible.
Another alternative would be to decorate the function with
__attribute__((nonnull)) which says it requires a non-null pointer:
extern __attribute__((nonnull)) void f(int* i);
Now you'll get a warning when compiling main2.cpp because the compiler can see
you're passing a null pointer to a function that says it requires non-null
pointers:
b.cc: In function ‘int main()’:
b.cc:5:14: warning: null argument where non-null required (argument 1)
[-Wnonnull]
f(nullptr);
^
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Subject: [Bug c++/85471] closing a "thread" in "C++" using "pthread_exit(NULL)" creates a "SIGABRT"
Date: Sat, 16 Jun 2018 20:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85471
--- Comment #4 from Andreas Otto <aotto1968@t-online.de> ---
change my C++ wrapper from "embedded data" (large amount of data) to just an
embedded pointer (only 8byte pointer in the C++ class)
→ the error is still there…
==57730== Process terminating with default action of signal 6 (SIGABRT)
==57730== at 0x6BA2F67: raise (raise.c:55)
==57730== by 0x6BA4339: abort (abort.c:78)
==57730== by 0x4178DD: _Unwind_SetGR (unwind-dw2.c:273)
==57730== by 0x409B8C: __gxx_personality_v0 (eh_personality.cc:712)
==57730== by 0x72AC4A4: _Unwind_ForcedUnwind_Phase2 (unwind.inc:175)
==57730== by 0x72ACA64: _Unwind_ForcedUnwind (unwind.inc:207)
==57730== by 0x696098F: __pthread_unwind (unwind.c:126)
==57730== by 0x695A8B4: __do_cancel (pthreadP.h:283)
==57730== by 0x695A8B4: pthread_exit (pthread_exit.c:28)
==57730== by 0x506554E: libmsgque::SysExit(int, int) (sys.cc:1000)
==57730== by 0x5059987: libmsgque::MqSysExit(int, int) (msgque.h:2038)
==57730== by 0x505B4F8: libmsgque::MqExitP(libmsgque::MqS*, char const*,
char const*) (msgque.cc:440)
==57730== by 0x50B2FAA: ccmsgque::MqC::ExitP(char const*, char const*)
(MqC.cc:380)
==57730== by 0x405EF7: Filter6::EXIT() (Filter6.cc:80)
==57730== by 0x5099A15: ccmsgque::MqC::ProcCall(libmsgque::MqS*, void*)
(ccmisc.cc:50)
==57730== by 0x5043DA3: libmsgque::MqCallbackCall(libmsgque::MqS*,
libmsgque::MqCallbackS) (msgque_private.h:326)
==57730== by 0x5045368: libmsgque::pTokenInvoke(libmsgque::pTokenS const*)
(token.cc:342)
==57730== by 0x507836C: libmsgque::pServiceStart(libmsgque::MqS*,
libmsgque::MqErrorE (*)(void*, libmsgque::MqS**, libmsgque::MqEnvS*), void*)
(service.cc:244)
==57730== by 0x502D33B: libmsgque::pEventStart(libmsgque::MqS*,
libmsgque::MqEventS*, timeval const*) (event.cc:287)
==57730== by 0x5055AD3: libmsgque::pIoSelectStart(libmsgque::MqIoS*, timeval
const*) (io.cc:267)
==57730== by 0x5078B3E: libmsgque::MqProcessEvent(libmsgque::MqS*, long,
libmsgque::MqWaitOnEventE) (service.cc:377)
==57730== by 0x5063F70:
libmsgque::MqSysServerThreadMain(libmsgque::MqSysServerThreadMainS*)
(sys.cc:488)
==57730== by 0x5063FB7: libmsgque::sSysServerThreadInit(void*) (sys.cc:502)
==57730== by 0x6959723: start_thread (pthread_create.c:457)
==57730== by 0x6C5AE8C: clone (clone.S:109)
==57730==
==57730== HEAP SUMMARY:
==57730== in use at exit: 160,370 bytes in 184 blocks
==57730== total heap usage: 940 allocs, 756 frees, 677,695 bytes allocated
==57730==
==57922==
==57922== HEAP SUMMARY:
==57922== in use at exit: 72,944 bytes in 4 blocks
==57922== total heap usage: 487 allocs, 483 frees, 273,097 bytes allocated
==57922==
==57922== LEAK SUMMARY:
==57922== definitely lost: 0 bytes in 0 blocks
==57922== indirectly lost: 0 bytes in 0 blocks
==57922== possibly lost: 0 bytes in 0 blocks
==57922== still reachable: 72,944 bytes in 4 blocks
==57922== suppressed: 0 bytes in 0 blocks
==57922== Rerun with --leak-check=full to see details of leaked memory
==57922==
==57922== For counts of detected and suppressed errors, rerun with: -v
==57922== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==57730== LEAK SUMMARY:
but I have additional "leakcheck" data…
---- trans2-3-TE2-init-(3|binary|uds|cc.uds.thread) start
==67406== 672 bytes in 2 blocks are possibly lost in loss record 131 of 151
==67406== at 0x4C2C240: calloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==67406== by 0x40119E1: allocate_dtv (dl-tls.c:322)
==67406== by 0x401223D: _dl_allocate_tls (dl-tls.c:539)
==67406== by 0x695A180: allocate_stack (allocatestack.c:580)
==67406== by 0x695A180: pthread_create@@GLIBC_2.2.5 (pthread_create.c:654)
==67406== by 0x5064231: libmsgque::SysServerThread(libmsgque::MqS*,
libmsgque::MqFactoryS*, libmsgque::MqBufferLS**, libmsgque::MqBufferLS**, char
const*, int, libmsgque::MqIdS*) (sys.cc:562)
==67406== by 0x5057E6F: libmsgque::pIoStartServer(libmsgque::MqIoS*,
libmsgque::IoStartServerE, libmsgque::MqSockS*, libmsgque::MqIdS*) (io.cc:692)
==67406== by 0x5053294: libmsgque::GenericServer(libmsgque::GenericS*,
sockaddr*, unsigned int) (generic_io.cc:155)
==67406== by 0x5048FE9: libmsgque::UdsServer(libmsgque::UdsS*)
(uds_io.cc:129)
==67406== by 0x505421E: libmsgque::pIoCreate(libmsgque::MqS*,
libmsgque::MqIoS**) (io.cc:95)
==67406== by 0x5083507: libmsgque::MqLinkCreate(libmsgque::MqS*,
libmsgque::MqBufferLS*) (link.cc:1104)
==67406== by 0x5084730: libmsgque::MqLinkDefault(libmsgque::MqS*,
libmsgque::MqBufferLS*) (link.cc:1256)
==67406== by 0x5082279: libmsgque::MqLinkCreate(libmsgque::MqS*,
libmsgque::MqBufferLS*) (link.cc:971)
==67406== by 0x50B3ACD: ccmsgque::MqC::LinkCreate(ccmsgque::MqBufferLC*)
(MqC.cc:414)
==67406== by 0x5095DE2: ccmsgque::MqC::LinkCreate(ccmsgque::MqBufferLC)
(ccmsgque.cc:151)
==67406== by 0x40498B: main (Filter6.cc:176)
==67406==
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Subject: [Bug c/86179] New: ice in get_later_stmt, at tree-vectorizer.h:1108
Date: Sat, 16 Jun 2018 20:50:00 -0000
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Bug ID: 86179
Summary: ice in get_later_stmt, at tree-vectorizer.h:1108
Product: gcc
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Subject: [Bug c/86179] ice in get_later_stmt, at tree-vectorizer.h:1108
Date: Sat, 16 Jun 2018 20:53:00 -0000
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
For this C code
c(int *d, char *g) {
char *a, *b, *e;
int f;
for (; f; f -= 8) {
*d++ = *e++ | (unsigned)*g++ << 8 | (unsigned)*b++ << 16 |
(unsigned)*a++ << 24;
*d++ = *e++ | (unsigned)*g++ << 8 | (unsigned)*b++ << 16 |
(unsigned)*a++ << 24;
}
}
compiled by recent gcc trunk and flag -O3, I get:
$ ~/gcc/results/bin/gcc -c -w -O3 bug446.c
during GIMPLE pass: vect
bug446.c: In function ‘c’:
bug446.c:1:1: internal compiler error: in get_later_stmt, at
tree-vectorizer.h:1108
c(int *d, char *g) {
^
0x7df578 get_later_stmt
../../trunk/gcc/tree-vectorizer.h:1105
0x7df578 vect_find_last_scalar_stmt_in_slp(_slp_tree*)
../../trunk/gcc/tree-vect-slp.c:1819
0x31aaaa6 vect_find_last_scalar_stmt_in_slp(_slp_tree*)
../../trunk/gcc/tree-vect-slp.c:1815
0x31aaaa6 vect_schedule_slp_instance
$ ~/gcc/results/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/home/dcb/gcc/results/bin/gcc
COLLECT_LTO_WRAPPER=/home/dcb/gcc/results.261680.ubsan/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../trunk/configure --prefix=/home/dcb/gcc/results.261680.ubsan
--with-build-config=bootstrap-ubsan --disable-multilib --disable-werror
--enable-checking=df,extra,fold,rtl,yes --enable-languages=c,c++,fortran
Thread model: posix
gcc version 9.0.0 20180616 (experimental) (GCC)
$
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64946] [AArch64] gcc.target/aarch64/vect-abs-compile.c - "abs" vectorization fails for char/short types
Date: Sat, 16 Jun 2018 21:35:00 -0000
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--- Comment #24 from kugan at gcc dot gnu.org ---
Author: kugan
Date: Sat Jun 16 21:34:29 2018
New Revision: 261681
URL: https://gcc.gnu.org/viewcvs?rev=261681&root=gcc&view=rev
Log:
gcc/ChangeLog:
2018-06-16 Kugan Vivekanandarajah <kuganv@linaro.org>
PR middle-end/64946
* cfgexpand.c (expand_debug_expr): Hande ABSU_EXPR.
* config/i386/i386.c (ix86_add_stmt_cost): Likewise.
* dojump.c (do_jump): Likewise.
* expr.c (expand_expr_real_2): Check operand type's sign.
* fold-const.c (const_unop): Handle ABSU_EXPR.
(fold_abs_const): Likewise.
* gimple-pretty-print.c (dump_unary_rhs): Likewise.
* gimple-ssa-backprop.c (backprop::process_assign_use): Likesie.
(strip_sign_op_1): Likesise.
* match.pd: Add new pattern to generate ABSU_EXPR.
* optabs-tree.c (optab_for_tree_code): Handle ABSU_EXPR.
* tree-cfg.c (verify_gimple_assign_unary): Likewise.
* tree-eh.c (operation_could_trap_helper_p): Likewise.
* tree-inline.c (estimate_operator_cost): Likewise.
* tree-pretty-print.c (dump_generic_node): Likewise.
* tree-vect-patterns.c (vect_recog_sad_pattern): Likewise.
* tree.def (ABSU_EXPR): New.
gcc/c-family/ChangeLog:
2018-06-16 Kugan Vivekanandarajah <kuganv@linaro.org>
* c-common.c (c_common_truthvalue_conversion): Handle ABSU_EXPR.
gcc/c/ChangeLog:
2018-06-16 Kugan Vivekanandarajah <kuganv@linaro.org>
* c-typeck.c (build_unary_op): Handle ABSU_EXPR;
* gimple-parser.c (c_parser_gimple_statement): Likewise.
(c_parser_gimple_unary_expression): Likewise.
gcc/cp/ChangeLog:
2018-06-16 Kugan Vivekanandarajah <kuganv@linaro.org>
* constexpr.c (potential_constant_expression_1): Handle ABSU_EXPR.
* cp-gimplify.c (cp_fold): Likewise.
gcc/testsuite/ChangeLog:
2018-06-16 Kugan Vivekanandarajah <kuganv@linaro.org>
PR middle-end/64946
* gcc.dg/absu.c: New test.
* gcc.dg/gimplefe-29.c: New test.
* gcc.target/aarch64/pr64946.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/absu.c
trunk/gcc/testsuite/gcc.dg/gimplefe-29.c
trunk/gcc/testsuite/gcc.target/aarch64/pr64946.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-typeck.c
trunk/gcc/c/gimple-parser.c
trunk/gcc/cfgexpand.c
trunk/gcc/config/i386/i386.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/dojump.c
trunk/gcc/expr.c
trunk/gcc/fold-const.c
trunk/gcc/gimple-pretty-print.c
trunk/gcc/gimple-ssa-backprop.c
trunk/gcc/match.pd
trunk/gcc/optabs-tree.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-cfg.c
trunk/gcc/tree-eh.c
trunk/gcc/tree-inline.c
trunk/gcc/tree-pretty-print.c
trunk/gcc/tree-vect-patterns.c
trunk/gcc/tree.def
>From gcc-bugs-return-607410-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 21:40:09 2018
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Subject: [Bug middle-end/82479] missing popcount builtin detection
Date: Sat, 16 Jun 2018 21:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82479
--- Comment #13 from kugan at gcc dot gnu.org ---
Author: kugan
Date: Sat Jun 16 21:39:31 2018
New Revision: 261682
URL: https://gcc.gnu.org/viewcvs?rev=261682&root=gcc&view=rev
Log:
gcc/ChangeLog:
2018-06-16 Kugan Vivekanandarajah <kuganv@linaro.org>
PR middle-end/82479
* ipa-fnsummary.c (will_be_nonconstant_expr_predicate): Handle
CALL_EXPR.
* tree-scalar-evolution.c (interpret_expr): Likewise.
(expression_expensive_p): Likewise.
* tree-ssa-loop-ivopts.c (contains_abnormal_ssa_name_p): Likewise.
* tree-ssa-loop-niter.c (number_of_iterations_popcount): New.
(number_of_iterations_exit_assumptions): Use
number_of_iterations_popcount.
(ssa_defined_by_minus_one_stmt_p): New.
gcc/testsuite/ChangeLog:
2018-06-16 Kugan Vivekanandarajah <kuganv@linaro.org>
PR middle-end/82479
* gcc.dg/tree-ssa/popcount.c: New test.
* gcc.dg/tree-ssa/popcount2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/popcount.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/popcount2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-fnsummary.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-scalar-evolution.c
trunk/gcc/tree-ssa-loop-ivopts.c
trunk/gcc/tree-ssa-loop-niter.c
>From gcc-bugs-return-607411-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 23:06:04 2018
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Subject: [Bug c++/86177] Wnull-dereference warning for object file compile missing
Date: Sat, 16 Jun 2018 23:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86177
--- Comment #4 from Jonny Grant <jg at jguk dot org> ---
Thank you for your replies!
Could the -flto tip be added to the -Wnull-dereference documentation?
https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
>From gcc-bugs-return-607412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jun 16 23:10:29 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++/86177] Wnull-dereference warning for object file compile missing
Date: Sat, 16 Jun 2018 23:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86177
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Why add it there and not to every other warning option that depends on
interprocedural analysis and inlining?
If the dereference and the null pointer are in separate files, then of course
the compiler can't warn. That's just how C++ works.
>From gcc-bugs-return-607413-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 00:54:11 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86180] New: Friend function definition not instantiated in certain circumstances
Date: Sun, 17 Jun 2018 00:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86180
Bug ID: 86180
Summary: Friend function definition not instantiated in certain
circumstances
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
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The following code compiles fine on clang++:
template<typename T>
struct provide {
friend T f() { return T(); }
};
void g() {
void f();
provide<void> p;
f();
}
int main() {
g();
}
However, gcc++ reports that it cannot find the definition of f.
Indeed, a previous version of clang++ cannot compile the above code either. It
was fixed in https://bugs.llvm.org/show_bug.cgi?id=9518
I believe that gcc++ shall also fix the bug, right?
>From gcc-bugs-return-607414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 01:12:00 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86181] New: static object mangling conflicts
Date: Sun, 17 Jun 2018 01:12:00 -0000
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Bug ID: 86181
Summary: static object mangling conflicts
Product: gcc
Version: unknown
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I found that gcc+ produces errors when it compiles the following code:
extern "C" void abort();
static int i;
int *p = &i;
int main()
{
int i;
{
extern int i;
i = 1;
*p = 2;
if (i == 2)
abort ();
}
return 0;
}
When compiling the above code, clang++ does not produce any errors. The code
comes from https://bugs.llvm.org/show_bug.cgi?id=5966
Indeed, the situation is more complicated. The above bug report of clang says
that the code comes from a bug report of gcc:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31775
The gcc report has a long discussion on this issue. Perhaps, the bug is not
fully fixed?
>From gcc-bugs-return-607415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 01:26:32 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86182] New: gcc crashes when compiling the code
Date: Sun, 17 Jun 2018 01:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86182
Bug ID: 86182
Summary: gcc crashes when compiling the code
Product: gcc
Version: unknown
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Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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The code is as follow:
#include <stdio.h>
template<typename T> static char const * f(T *t) {
T u(*t);
u.x = "hello world";
printf("%s\n", u.x);
return "initialized";
}
int main() {
union { char const *x = f(this); };
printf("%s\n", x);
}
gcc++ produces errors messages:
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_10531/code0.c.cpp: In
function ‘const char* f(T*) [with T = main()::<unnamed union>]’:
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_10531/code0.c.cpp:3:42:
error：Local declaration from a different function
template<typename T> static char const * f(T *t) {
^
D.2918
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_10531/code0.c.cpp:4:4:
T u(*t);
^
_1 = &D.2918;
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_10531/code0.c.cpp:3:42:
error：Local declaration from a different function
template<typename T> static char const * f(T *t) {
^
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_10531/code0.c.cpp:3:42:
error：Local declaration from a different function
during GIMPLE pass: cfg
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_10531/code0.c.cpp:3:42:
internal error：verify_gimple 失败
0xf11023 verify_gimple_in_cfg(function*, bool)
../../code/gcc/tree-cfg.c:5585
0xdf808f execute_function_todo
../../code/gcc/passes.c:1994
0xdf8fde execute_todo
../../code/gcc/passes.c:2048
Please include the complete backtrace with any bug report.
The code comes from a bug report of clang++
https://bugs.llvm.org/show_bug.cgi?id=10531
The clang report can provide hints to understand the problem.
>From gcc-bugs-return-607416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 01:36:18 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86183] New: Scoped enumeration instantiated even if not required
Date: Sun, 17 Jun 2018 01:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86183
Bug ID: 86183
Summary: Scoped enumeration instantiated even if not required
Product: gcc
Version: unknown
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Severity: normal
Priority: P3
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gcc produces errors when compiling the following code:
template<typename T>
struct A {
enum class B {
X = T::value
};
};
int main() {
A<int> a;
}
A previous version of clang++ also produces errors when compiling the above
code, but it was fixed in https://bugs.llvm.org/show_bug.cgi?id=10044
Shall gcc also fix the problem?
>From gcc-bugs-return-607417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 01:49:50 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86184] New: Shall gcc support this feature?
Date: Sun, 17 Jun 2018 01:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86184
Bug ID: 86184
Summary: Shall gcc support this feature?
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
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gcc++ produces errors when compiling the following code:
#include <stdio.h>
int main(int argc, char **argv) {
printf("%p\n", (void *)0xdeadbeef ? : (void *)0xaaaaaa);
return 0;
}
This code comes from a bug report of clang:
https://bugs.llvm.org/show_bug.cgi?id=7726
The programmers of clang discuss the code in details. They mentioned that gcc
does not accept the above code, but after all, they decide to implement the
feature to compile the code.
Shall gcc also support this feature?
>From gcc-bugs-return-607418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 01:59:57 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86185] New: gcc does not reject the ill-formed code
Date: Sun, 17 Jun 2018 01:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86185
Bug ID: 86185
Summary: gcc does not reject the ill-formed code
Product: gcc
Version: unknown
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Severity: normal
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gcc++ does not produce any errors when it compiles the following code:
template<typename T>
void f() {
auto i = T(), j = 0;
}
int main() {
f<long>();
f<int>();
}
The code comes from a bug report of clang:
https://bugs.llvm.org/show_bug.cgi?id=9276
Johannes Schaub analyzed why clang shall reject the code.
Shall gcc also reject the code?
>From gcc-bugs-return-607419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 02:08:24 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86186] New: Unqualified calls of std::get lead to ADL issues
Date: Sun, 17 Jun 2018 02:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86186
Bug ID: 86186
Summary: Unqualified calls of std::get lead to ADL issues
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
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The sample code is as follow:
#include <tuple>
#include <utility>
namespace foo {
struct bar { bool operator==(bar) const { return true; } };
template <std::size_t I>
struct hard_error { static_assert(I > 0, ""); using type = void; };
template <std::size_t I, typename T>
typename hard_error<I>::type get(T) {}
}
int main()
{
std::tuple<foo::bar, int> t1, t2;
t1 == t2; // error: static_assert failed ""
// note: in instantiation of template class 'foo::hard_error<0>'
// note: while substituting explicitly-specified template arguments into
function template 'get'
}
A previous version of clang++ does not produce any error messages for the above
code, but it was fixed in https://bugs.llvm.org/show_bug.cgi?id=20092
>From gcc-bugs-return-607420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 02:44:49 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86187] New: Subscript operator applied to an temporary array results in an lvalue
Date: Sun, 17 Jun 2018 02:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86187
Bug ID: 86187
Summary: Subscript operator applied to an temporary array
results in an lvalue
Product: gcc
Version: unknown
Status: UNCONFIRMED
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The code is as follow:
using Y = int[10];
int main() {
(Y { })[0] = 1;
}
The code comes from a discussion on Stackoverflow:
http://stackoverflow.com/questions/33161003/using-a-temporary-array-as-an-lvalue
The problem was reported to clang and it was fixed:
https://bugs.llvm.org/show_bug.cgi?id=25357
Although now clang provides diagnostic, gcc++ still does not provide any error
messages. Please fix the problem.
>From gcc-bugs-return-607421-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 03:32:11 2018
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From: "joshua.r.marshall.1991 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86188] New: Enhancement to std::merge, constexpr check of iterator types
Date: Sun, 17 Jun 2018 03:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86188
Bug ID: 86188
Summary: Enhancement to std::merge, constexpr check of iterator
types
Product: gcc
Version: unknown
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Target Milestone: ---
Before I go in an submitting patches all willy-nilly, I've been poking at
std::merge and I think I see that it could catch some programming bugs better
with constexpr std::iterator_traits<Iterator>::iterator_category == <<relevant
tag here>>. This looks simple, but there may also be a reason it hasn't been
done.
>From gcc-bugs-return-607422-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 04:35:24 2018
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Subject: [Bug driver/40960] POSIX requires that option -D have a lower precedence than -U
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=80535
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #5)
>
> Confirmed, I think a configure option would be a good way to go about it.
Other options as mentioned in bug 80535 comment 1 include respecting the
POSIXLY_CORRECT environment variable, and/or adding a -posix-std= flag to
mirror the existing -std= flag for the language standard
>From gcc-bugs-return-607423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 04:37:11 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/29931] following argv[0] symlink in process_command breaks symlinked-together toolchain
Date: Sun, 17 Jun 2018 04:37:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |WAITING
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #6)
> (In reply to Jorn Wolfgang Rennecke from comment #4)
> > The bug is not fixed; the gcc.c patch has not been reviewed.
>
> What about now, after r169891? As mentioned in the comment after you:
>
> (In reply to simonb from comment #5)
> > Author: simonb
> > Date: Mon Feb 7 18:10:15 2011
> > New Revision: 169891
> >
> > URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=169891
> > Log:
> > Auto-detect suitable default behaviour for prefix canonicalization.
> >
> > Current gcc offers -no-canonical-prefixes to turn off realpath() for prefixes
> > generated from the path used to address the gcc driver. This allows gcc to
> > work in "symlink farm" installations, where every file in gcc is actually a
> > symlink to its real contents. However, the flag has to be given explicitly.
> > If not, the default is to use realpath() to create prefixes and the result
> > is usually failure to find cc1[plus], f951, etc.
> >
> > This patch adds a check for a file as a way to auto-detect whether prefix
> > canonicalization is appropriate or not. Detection can be overridden by
> > using the -[no-]canonical-prefixes flags.
> >
> > The patch also completes the fix for PR/29931, adding code that covers the
> > unadopted portion of this PR's attached patch.
> >
> > gcc/ChangeLog.google:
> > 2011-02-07 Simon Baldwin <simonb@google.com>
> >
> > PR driver/29931
> > * doc/invoke.texi: Adjust -[no-]canonical-prefixes documentation.
> > * gcc.c (display_help): Help text for -[no-]canonical-prefixes.
> > (driver_handle_option): Ignore OPT_canonical_prefixes.
> > (process_command): Handle OPT_[no_]canonical_prefixes, auto-detect
> > suitable default prefix canonicalization mode.
> > * common.opt (canonical-prefixes): New flag.
> >
> > Google ref: 40029, 38719
> >
> >
> > Modified:
> > branches/google/integration/gcc/ChangeLog.google-integration
> > branches/google/integration/gcc/common.opt
> > branches/google/integration/gcc/doc/invoke.texi
> > branches/google/integration/gcc/gcc.c
WAITING on a reply
>From gcc-bugs-return-607424-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 04:46:49 2018
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Subject: [Bug c++/68615] Unhelpful location when missing a semi-colon on a function declaration at the end of a header
Date: Sun, 17 Jun 2018 04:46:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
Since David put himself as the assignee for this, I'm changing the status to
ASSIGNED.
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Subject: [Bug c++/56084] poor error recovery for missing ";"
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Eric Gallager <egallager at gcc dot gnu.org> ---
ASSIGNED because it already has an assignee.
>From gcc-bugs-return-607426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 04:52:39 2018
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Subject: [Bug other/84904] Implement an option to attempt to auto-apply fix-it hints
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-17
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
Confirmed as an enhancement and ASSIGNED since you already assigned yourself
>From gcc-bugs-return-607427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 05:25:49 2018
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/84887] missing semicolon: further improvements
Date: Sun, 17 Jun 2018 05:25:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-17
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #3)
> (In reply to Eric Gallager from comment #2)
> > link to thread on reddit?
> >
>
> Never mind, I found it:
> https://www.reddit.com/r/programming/comments/84oizv/
> usability_improvements_in_gcc_8/dvr93d4/
> I'll confirm this bug after finding the Hacker News one, too.
Actually never mind again; that link isn't necessary to confirm this bug.
ASSIGNED since there's an assignee.
>From gcc-bugs-return-607429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 05:28:21 2018
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Subject: [Bug c++/85867] Subscript operator applied to an temporary array results in an lvalue
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Marc Glisse <glisse at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |zhonghao at pku dot org.cn
--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
*** Bug 86187 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 05:28:18 2018
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Subject: [Bug c++/86187] Subscript operator applied to an temporary array results in an lvalue
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Marc Glisse <glisse at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
It has the same exact title, code, SO link, clang link...
*** This bug has been marked as a duplicate of bug 85867 ***
>From gcc-bugs-return-607430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 08:37:29 2018
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Subject: [Bug c++/86177] Wnull-dereference warning for object file compile missing
Date: Sun, 17 Jun 2018 08:37:00 -0000
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--- Comment #6 from Jonny Grant <jg at jguk dot org> ---
Jonathan, This is a good point. Where is best to document it?
It's very useful to have these warnings, and I was unaware that -Wall would not
turn on such a necessary feature, or -O2
Could there be overall documentation on some default warning options that give
most useful warnings for safe code development?
BTW, I do feel the function could be warned when compiled as an object.
void f(int *i)
{
*i = 1;
}
There is an implied requirement that the pointer is never null.
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Subject: [Bug c/86178] No warning when missing return from function main()
Date: Sun, 17 Jun 2018 08:41:00 -0000
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--- Comment #3 from Jonny Grant <jg at jguk dot org> ---
oops, my bad
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/84195] newlines in deprecated diagnostics
Date: Sun, 17 Jun 2018 11:39:00 -0000
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Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2018-06-17
Resolution|FIXED |---
Ever confirmed|0 |1
--- Comment #6 from Andreas Schwab <schwab@linux-m68k.org> ---
FAIL: gcc.c-torture/compile/pr84195.c -O0 (test for warnings, line 15)
FAIL: gcc.c-torture/compile/pr84195.c -O0 (test for excess errors)
Excess errors:
/opt/gcc/gcc-20180616/gcc/testsuite/gcc.c-torture/compile/pr84195.c:15:3:
warning: 'i' is deprecated: foo
bar [-Wdeprecated-declarations]
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Subject: [Bug c++/86147] [8/9 Regression] Lambda is capturing a non-ODR-used constexpr
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 15:46:12 2018
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86171] [6/7/8/9 Regression] g++ ICE on valid code: tree check: expected var_decl or function_decl, have type_decl in duplicate_decls, at cp/decl.c:2291
Date: Sun, 17 Jun 2018 15:46:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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CC| |jason at gcc dot gnu.org
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>From gcc-bugs-return-607435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 20:07:36 2018
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From: "rianquinn at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86189] New: not equal allocators not behaving as expected
Date: Sun, 17 Jun 2018 20:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86189
Bug ID: 86189
Summary: not equal allocators not behaving as expected
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: rianquinn at gmail dot com
Target Milestone: ---
I think this is a bug, but I am dealing with allocators so I am not 100% sure
here. I have created a really simple allocator for testing. The allocators are
NOT equal, and I have instructed the containers to propagate the allocator
using the propagate_on_container_copy_assignment alias set to true. Propagation
occurs, but during the destruction of the containers, the old allocator is
somehow being used. Whats worse is the newly allocated memory that was created
using one allocator, is deallocated using another, even though they are not
equal. Seems like a bug.
Here is the allocator I have created:
template<typename T>
class myallocator4
{
public:
using value_type = T;
using pointer = T *;
using size_type = std::size_t;
using propagate_on_container_copy_assignment = std::true_type;
using is_always_equal = std::false_type;
public:
myallocator4() = default;
template <typename U>
myallocator4(const myallocator4<U> &other) noexcept
{ (void) other; }
pointer allocate(size_type n)
{
if (auto ptr = static_cast<pointer>(malloc(sizeof(T) * n))) {
std::cout << "A: " << this << " ptr: " << ptr << '\n';
return ptr;
}
throw std::bad_alloc();
}
void deallocate(pointer p, size_type n)
{
(void) n;
std::cout << "D: " << this << " ptr: " << p << '\n';
free(p);
}
};
template <typename T1, typename T2>
bool operator==(const myallocator4<T1> &, const myallocator4<T2> &)
{ return false; }
template <typename T1, typename T2>
bool operator!=(const myallocator4<T1> &, const myallocator4<T2> &)
{ return true; }
Here is the test case:
TEST_CASE("copy container, propogate")
{
std::cout << "copy container, propogate\n";
std::list<int, myallocator4<int>> mylist1;
std::list<int, myallocator4<int>> mylist2;
mylist1.push_back(1);
mylist1.push_back(2);
mylist1.push_back(3);
mylist2.push_back(4);
mylist2.push_back(5);
mylist2.push_back(6);
std::cout << "--------------------------" << '\n';
mylist2 = mylist1;
std::cout << "--------------------------" << '\n';
}
And here is the result:
copy container, propogate
A: 0x7ffce414af40 ptr: 0x562e4822ca30
A: 0x7ffce414af40 ptr: 0x562e4822cbf0
A: 0x7ffce414af40 ptr: 0x562e4822cc40
A: 0x7ffce414af60 ptr: 0x562e48237880
A: 0x7ffce414af60 ptr: 0x562e48233fe0
A: 0x7ffce414af60 ptr: 0x562e4822cc60
--------------------------
D: 0x7ffce414af60 ptr: 0x562e48237880
D: 0x7ffce414af60 ptr: 0x562e48233fe0
D: 0x7ffce414af60 ptr: 0x562e4822cc60
A: 0x7ffce414ae40 ptr: 0x562e4822cc60
A: 0x7ffce414ae40 ptr: 0x562e48233fe0
A: 0x7ffce414ae40 ptr: 0x562e48237880
--------------------------
D: 0x7ffce414af60 ptr: 0x562e4822cc60
D: 0x7ffce414af60 ptr: 0x562e48233fe0
D: 0x7ffce414af60 ptr: 0x562e48237880
D: 0x7ffce414af40 ptr: 0x562e4822ca30
D: 0x7ffce414af40 ptr: 0x562e4822cbf0
D: 0x7ffce414af40 ptr: 0x562e4822cc40
As can be seen, the allocator at 0x7ffce414af60 (which is the original
allocator for the second list) is used to deallocate memory from
0x7ffce414ae40, even though the allocators are not equal.
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Subject: [Bug c/84888] C/C++: Improve wording of unclosed paren/brace
Date: Sun, 17 Jun 2018 20:20:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=84887
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #2)
> (In reply to Eric Gallager from comment #1)
> >
> > As in bug 84887, I'd like a link to the reddit thread mentioned here, too
>
> Thread is here:
> https://www.reddit.com/r/programming/comments/84oizv/usability_improvements_in_gcc_8/dvr93d4/
> Confirming on the basis that your original bug was actually a confirmation
> of the linked comment.
Also ASSIGNED since you're the assignee.
>From gcc-bugs-return-607437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 20:22:24 2018
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Subject: [Bug c++/84897] Better handling of unqualified "string"
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
Changing status to ASSIGNED since there's an assignee.
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Subject: [Bug c++/84898] Fix-it hints for '.' vs '->'
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
assignee = ASSIGNED
>From gcc-bugs-return-607439-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 20:25:59 2018
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Subject: [Bug c++/84916] Tweaks to template type elision
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #0)
> In
> https://www.reddit.com/r/programming/comments/84oizv/usability_improvements_in_gcc_8/dvrdyhv/
> Reddit user "Liorithiel" pointed out:
>
> > Have you considered performing elision conditionally on the length on the
> > elided part? I see the benefits of changing, let say,
>
> std::map<some<long, and, nested<type>>, std::string>
>
> > into
>
> std::map<[...], std::string>,
>
> > but for me,
>
> std::map<int, int>
>
> > is clearer than
>
> std::map<[...], int>.
>
> (see the other comments downthread from thread).
>
> I'm filing this reminder to take a look at tweaking this for gcc 9.
Trunk is on gcc 9 now. Confirming since this originally came from someone else,
and changing status to ASSIGNED since you're the assignee.
>
> Maybe only elide common items if there's "more than one thing" e.g. if it's
> a template itself, or is multiple args?
>From gcc-bugs-return-607440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 20:28:38 2018
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Subject: [Bug c++/84360] unnecessary aka in error message
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> (In reply to David Malcolm from comment #3)
> > So should this ideally read:
> > return type ‘T’ {aka ‘class std::tuple<int, int, int>’} is incomplete
> > to express both the name the code used, and the underlying type?
>
> Yes.
Confirming and changing status to ASSIGNED since David put himself as the
assignee.
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Subject: [Bug c++/84917] Verbosity when dealing with nested template data structures
Date: Sun, 17 Jun 2018 20:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84917
Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-17
Ever confirmed|0 |1
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #0)
> In
> https://www.reddit.com/r/programming/comments/84oizv/usability_improvements_in_gcc_8/dvsa8dw/
> Reddit user "rifeid" reports excess verbosity...
>
> > [...] when dealing with nested template data structures. For example,
>
> #include <string>
> #include <vector>
> using vec = std::vector<std::string>;
> void blah() {
> vec x;
> x.foo();
> }
>
> > results in
>
> test.cpp: In function ‘void blah()’:
> test.cpp:6:4: error: ‘using vec = class
> std::vector<std::__cxx11::basic_string<char> > {aka class
> std::vector<std::__cxx11::basic_string<char> >}’ has no member named ‘foo’
> x.foo();
> ^~~
>
> > My issues with this:
> >
> > It may look better if the error: line just uses vec, and
> > have the full expansion relegated to a note: line. Not sure.
> >
> > The expansion is printed twice.
> >
> > As std::string is part of the C++ standard, I'd prefer it unexpanded.
>
> Confirmed on godbolt.org.
So, confirmed then. And ASSIGNED as with other bugs.
>
> I think parts of these are a dup (maybe of PR c++/84360) but it seems worth
> capturing here and fixing.
>From gcc-bugs-return-607442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Jun 17 20:33:38 2018
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/26061] error and warning count
Date: Sun, 17 Jun 2018 20:33:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #22 from Eric Gallager <egallager at gcc dot gnu.org> ---
Changing status to ASSIGNED since David Malcolm put himself as the assignee.
>From gcc-bugs-return-607443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 06:26:56 2018
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From: "woodroof at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86190] New: -Wsign-conversion ignores explicit conversion in some cases
Date: Mon, 18 Jun 2018 06:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86190
Bug ID: 86190
Summary: -Wsign-conversion ignores explicit conversion in some
cases
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: woodroof at gmail dot com
Target Milestone: ---
Created attachment 44289
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44289&action=edit
Preprocessed source file
Affected versions:
g++ (Ubuntu 8-20180414-1ubuntu2) 8.0.1 20180414 (experimental) [trunk revision
259383]
g++-7 (Ubuntu 7.3.0-16ubuntu3) 7.3.0
Command line:
g++ -Wsign-conversion -c 1.cpp
Output:
1.cpp: In member function ‘bool A::func()’:
1.cpp:10:23: warning: conversion to ‘std::vector<int>::size_type’ {aka ‘long
unsigned int’} from ‘int’ may change the sign of the result [-Wsign-conversion]
return vec.size() < static_cast<size_t>(var);
^~~~~~~~~~~~~~~~~~~~~~~~
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Subject: [Bug libstdc++/86168] [9 regression] libstdc++ tests fail with error: call of overloaded 'random_device()' is ambiguous
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/86171] [6/7/8/9 Regression] g++ ICE on valid code: tree check: expected var_decl or function_decl, have type_decl in duplicate_decls, at cp/decl.c:2291
Date: Mon, 18 Jun 2018 07:27:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
>From gcc-bugs-return-607446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 07:39:17 2018
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Subject: [Bug c++/86173] Default construction of a union (in std::optional)
Date: Mon, 18 Jun 2018 07:39:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-18
CC| |ebotcazou at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is because of gimplification interpreting a CONSTURCTOR with missing
elements as to clear them unless CONSTRUCTOR_NO_CLEARING is set (which isn't).
So the GENERIC _doesn't_ look good since it says (implicitely) that 'a' is
zeroed.
Confirmed as C++ issue.
There's also the following weak heuristic that might kick in if
CONSTRUCTOR_NO_CLEARING would be set:
else if (num_ctor_elements - num_nonzero_elements
> CLEAR_RATIO (optimize_function_for_speed_p (cfun))
&& num_nonzero_elements < num_ctor_elements / 4)
/* If there are "lots" of zeros, it's more efficient to clear
the memory and then set the nonzero elements. */
cleared = true;
with CONSTRUCTOR_NO_CLEARING this heuristic is off by not honoring
the constructor elements being not present (but for the testcase it
doesn't matter). CCing Eric for this specific issue (not the C++ one).
>From gcc-bugs-return-607447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 07:56:42 2018
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Subject: [Bug tree-optimization/86174] Poor vectorization/register allocation with omp simd, FMA
Date: Mon, 18 Jun 2018 07:56:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |alias, missed-optimization
Target| |x86_64-*-*, i?86-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-18
CC| |rguenth at gcc dot gnu.org
Component|c |tree-optimization
Blocks| |53947
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. There's two things in the way - first we transform the
#pragma omp simd
for (int kk=0; kk<Sk; kk++) {
c[(i+ii)*p+k+kk] = C[ii][kk];
}
loop to memcpy (we could simply avoid that for force_vectorize loops as a
hack).
And if we avoid that, for example with -fno-tree-loop-distribute-patterns then
we fail to elide the stores to C[]. That happens because unrolling doesn't
preserve restrict info and when vectorization makes C addressable it doesn't
make restrict info reflect that it doesn't alias with anything.
We also do not have a late enough scalarization pass that would elide
the array - we'd rely on LIM/DSE here.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
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Subject: [Bug lto/86175] LTO code generator does not respect ld -u option to force symbol inclusion in the link product
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
With ld 2.30 it seems to work for me with a simple
void foo () {}
int main() { return 0; }
> gcc-8 t.c -flto -O -Wl,-u,foo,--gc-sections -ffunction-sections
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Subject: [Bug c++/86182] [8/9 Regression] gcc crashes when compiling the code
Date: Mon, 18 Jun 2018 08:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86182
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |7.3.1
Version|unknown |8.1.1
Keywords| |accepts-invalid,
| |ice-on-invalid-code
Last reconfirmed| |2018-06-18
Ever confirmed|0 |1
Summary|gcc crashes when compiling |[8/9 Regression] gcc
|the code |crashes when compiling the
| |code
Target Milestone|--- |8.2
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. GCC 7 rejects it:
> g++-7 t.C -S
t.C: In instantiation of ‘const char* f(T*) [with T = main()::<unnamed
union>]’:
t.C:11:32: required from here
t.C:5:4: error: use of local variable with automatic storage from containing
function
u.x = "hello world";
~~^
t.C:4:4: note: ‘main()::<unnamed union> <anonymous>’ declared here
T u(*t);
^
t.C:6:19: error: use of local variable with automatic storage from containing
function
printf("%s\n", u.x);
~~^
t.C:4:4: note: ‘main()::<unnamed union> <anonymous>’ declared here
T u(*t);
^
>From gcc-bugs-return-607450-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 08:18:42 2018
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86173] Default construction of a union (in std::optional)
Date: Mon, 18 Jun 2018 08:18:00 -0000
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> There's also the following weak heuristic that might kick in if
> CONSTRUCTOR_NO_CLEARING would be set:
>
> else if (num_ctor_elements - num_nonzero_elements
> > CLEAR_RATIO (optimize_function_for_speed_p (cfun))
> && num_nonzero_elements < num_ctor_elements / 4)
> /* If there are "lots" of zeros, it's more efficient to clear
> the memory and then set the nonzero elements. */
> cleared = true;
>
> with CONSTRUCTOR_NO_CLEARING this heuristic is off by not honoring
> the constructor elements being not present (but for the testcase it
> doesn't matter). CCing Eric for this specific issue (not the C++ one).
Ugh. I didn't write this but, yes, there is an oversight, the check on the
flag should probably be on entry instead:
if (CONSTRUCTOR_NO_CLEARING (ctor))
cleared = false;
else if (int_size_in_bytes (TREE_TYPE (ctor)) < 0)
...
else if
>From gcc-bugs-return-607451-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 08:23:41 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 c++/86176] Wnull-dereference warning disappears with a call to std::cout on the line after
Date: Mon, 18 Jun 2018 08:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-18
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The warning depends on inlining which makes it require -O2 in your case and
with the cout line uncommented the inlining doesn't take place because of cost
reasons. Making f static shows
> g++-7 t.C -O2 -Wnull-dereference
t.C: In function ‘int main()’:
t.C:6:11: warning: null pointer dereference [-Wnull-dereference]
printf("%d\n", *i);
~~~~~~^~~~~~~~~~~~
t.C:7:19: warning: null pointer dereference [-Wnull-dereference]
std::cout << *i;
^
so confirmed but the issues are by design. GCC isn't a static analyzer.
>From gcc-bugs-return-607452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 08:34:11 2018
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Subject: [Bug tree-optimization/85804] [8/9 Regression][AArch64] Mis-compilation of loop with strided array access and xor reduction
Date: Mon, 18 Jun 2018 08:34:00 -0000
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ramana at gcc dot gnu.org
--- Comment #2 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Patch being discussed here.
https://gcc.gnu.org/ml/gcc-patches/2018-05/msg01026.html
>From gcc-bugs-return-607453-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 08:45:01 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/86179] [9 Regression] ice in get_later_stmt, at tree-vectorizer.h:1108
Date: Mon, 18 Jun 2018 08:45:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Version|8.0 |9.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2018-06-18
Component|c |tree-optimization
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Summary|ice in get_later_stmt, at |[9 Regression] ice in
|tree-vectorizer.h:1108 |get_later_stmt, at
| |tree-vectorizer.h:1108
Target Milestone|--- |9.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
pattern recognition ends up with stale STMT_VINFO_RELATED_STMT it sets during
analyses that later fail.
Mine.
>From gcc-bugs-return-607454-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 08:50:40 2018
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From: "ramana at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64946] [AArch64] gcc.target/aarch64/vect-abs-compile.c - "abs" vectorization fails for char/short types
Date: Mon, 18 Jun 2018 08:50:00 -0000
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--- Comment #25 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to kugan from comment #24)
> Author: kugan
> Date: Sat Jun 16 21:34:29 2018
> New Revision: 261681
>
> URL: https://gcc.gnu.org/viewcvs?rev=261681&root=gcc&view=rev
> Log:
> gcc/ChangeLog:
>
> 2018-06-16 Kugan Vivekanandarajah <kuganv@linaro.org>
>
> PR middle-end/64946
> * cfgexpand.c (expand_debug_expr): Hande ABSU_EXPR.
> * config/i386/i386.c (ix86_add_stmt_cost): Likewise.
> * dojump.c (do_jump): Likewise.
> * expr.c (expand_expr_real_2): Check operand type's sign.
> * fold-const.c (const_unop): Handle ABSU_EXPR.
> (fold_abs_const): Likewise.
> * gimple-pretty-print.c (dump_unary_rhs): Likewise.
> * gimple-ssa-backprop.c (backprop::process_assign_use): Likesie.
> (strip_sign_op_1): Likesise.
> * match.pd: Add new pattern to generate ABSU_EXPR.
> * optabs-tree.c (optab_for_tree_code): Handle ABSU_EXPR.
> * tree-cfg.c (verify_gimple_assign_unary): Likewise.
> * tree-eh.c (operation_could_trap_helper_p): Likewise.
> * tree-inline.c (estimate_operator_cost): Likewise.
> * tree-pretty-print.c (dump_generic_node): Likewise.
> * tree-vect-patterns.c (vect_recog_sad_pattern): Likewise.
> * tree.def (ABSU_EXPR): New.
>
> gcc/c-family/ChangeLog:
>
> 2018-06-16 Kugan Vivekanandarajah <kuganv@linaro.org>
>
> * c-common.c (c_common_truthvalue_conversion): Handle ABSU_EXPR.
>
> gcc/c/ChangeLog:
>
> 2018-06-16 Kugan Vivekanandarajah <kuganv@linaro.org>
>
> * c-typeck.c (build_unary_op): Handle ABSU_EXPR;
> * gimple-parser.c (c_parser_gimple_statement): Likewise.
> (c_parser_gimple_unary_expression): Likewise.
>
> gcc/cp/ChangeLog:
>
> 2018-06-16 Kugan Vivekanandarajah <kuganv@linaro.org>
>
> * constexpr.c (potential_constant_expression_1): Handle ABSU_EXPR.
> * cp-gimplify.c (cp_fold): Likewise.
>
> gcc/testsuite/ChangeLog:
>
> 2018-06-16 Kugan Vivekanandarajah <kuganv@linaro.org>
>
> PR middle-end/64946
> * gcc.dg/absu.c: New test.
> * gcc.dg/gimplefe-29.c: New test.
> * gcc.target/aarch64/pr64946.c: New test.
>
>
> Added:
> trunk/gcc/testsuite/gcc.dg/absu.c
> trunk/gcc/testsuite/gcc.dg/gimplefe-29.c
> trunk/gcc/testsuite/gcc.target/aarch64/pr64946.c
> Modified:
> trunk/gcc/ChangeLog
> trunk/gcc/c-family/ChangeLog
> trunk/gcc/c-family/c-common.c
> trunk/gcc/c/ChangeLog
> trunk/gcc/c/c-typeck.c
> trunk/gcc/c/gimple-parser.c
> trunk/gcc/cfgexpand.c
> trunk/gcc/config/i386/i386.c
> trunk/gcc/cp/ChangeLog
> trunk/gcc/cp/constexpr.c
> trunk/gcc/cp/cp-gimplify.c
> trunk/gcc/dojump.c
> trunk/gcc/expr.c
> trunk/gcc/fold-const.c
> trunk/gcc/gimple-pretty-print.c
> trunk/gcc/gimple-ssa-backprop.c
> trunk/gcc/match.pd
> trunk/gcc/optabs-tree.c
> trunk/gcc/testsuite/ChangeLog
> trunk/gcc/tree-cfg.c
> trunk/gcc/tree-eh.c
> trunk/gcc/tree-inline.c
> trunk/gcc/tree-pretty-print.c
> trunk/gcc/tree-vect-patterns.c
> trunk/gcc/tree.def
Doesn't this mean we unxfail the vect-abs-compile.c test ?
>From gcc-bugs-return-607455-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 09:11:05 2018
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Subject: [Bug c++/86181] static object mangling conflicts
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |rguenth at gcc dot gnu.org
Version|unknown |8.1.0
Resolution|--- |INVALID
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think the clang bug is incomplete and misses the 2nd TU which defines i. So
GCC works (and the testcase is in the testsuite).
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86190] -Wsign-conversion ignores explicit conversion in some cases
Date: Mon, 18 Jun 2018 09:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86190
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2018-06-18
CC| |rguenth at gcc dot gnu.org
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, what are you expecting? The warning seems legit to me.
>From gcc-bugs-return-607457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 09:14:13 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/86144] GCC is not generating vector math calls to svml/acml functions
Date: Mon, 18 Jun 2018 09:14:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to vekumar from comment #3)
> (In reply to Richard Biener from comment #2)
> > Note a workaround would be to re-arrange the vectorizer calls to
> > vectorizable_simd_clone_call and vectorizable_call. Can you check if
> > the following works? It gives precedence to what the target hook
> > (and thus -mveclibabi) provides.
> >
> > diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
> > index 9f365e31e49..bdef56bf65e 100644
> > --- a/gcc/tree-vect-stmts.c
> > +++ b/gcc/tree-vect-stmts.c
> > @@ -9543,13 +9543,13 @@ vect_analyze_stmt (gimple *stmt, bool
> > *need_to_vectorize, slp_tree node,
> > if (!bb_vinfo
> > && (STMT_VINFO_RELEVANT_P (stmt_info)
> > || STMT_VINFO_DEF_TYPE (stmt_info) == vect_reduction_def))
> > - ok = (vectorizable_simd_clone_call (stmt, NULL, NULL, node, cost_vec)
> > + ok = (vectorizable_call (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_conversion (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_shift (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_operation (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_assignment (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_load (stmt, NULL, NULL, node, node_instance,
> > cost_vec)
> > - || vectorizable_call (stmt, NULL, NULL, node, cost_vec)
> > + || vectorizable_simd_clone_call (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_store (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_reduction (stmt, NULL, NULL, node, node_instance,
> > cost_vec)
> > @@ -9559,14 +9559,14 @@ vect_analyze_stmt (gimple *stmt, bool
> > *need_to_vectorize, slp_tree node,
> > else
> > {
> > if (bb_vinfo)
> > - ok = (vectorizable_simd_clone_call (stmt, NULL, NULL, node, cost_vec)
> > + ok = (vectorizable_call (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_conversion (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_shift (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_operation (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_assignment (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_load (stmt, NULL, NULL, node, node_instance,
> > cost_vec)
> > - || vectorizable_call (stmt, NULL, NULL, node, cost_vec)
> > + || vectorizable_simd_clone_call (stmt, NULL, NULL, node,
> > cost_vec)
> > || vectorizable_store (stmt, NULL, NULL, node, cost_vec)
> > || vectorizable_condition (stmt, NULL, NULL, NULL, 0, node,
> > cost_vec)
>
> Checked the patch now it give preference to -mveclibabi= option and
> generating expected calls.
Jakub, are you fine with this change?
>From gcc-bugs-return-607458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 10:32:19 2018
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Subject: [Bug c++/86190] -Wsign-conversion ignores explicit conversion in some cases
Date: Mon, 18 Jun 2018 10:32:00 -0000
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--- Comment #2 from Danil Ilinykh <woodroof at gmail dot com> ---
I explicity said to compiler, what I want to convert int to size_t. And it
still produces warning.
If I replace static_cast to variable with the same initialization, warning will
be gone.
>From gcc-bugs-return-607459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 10:39:38 2018
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From: "nickc at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/84195] newlines in deprecated diagnostics
Date: Mon, 18 Jun 2018 10:39:00 -0000
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--- Comment #7 from Nick Clifton <nickc at gcc dot gnu.org> ---
Author: nickc
Date: Mon Jun 18 10:39:01 2018
New Revision: 261697
URL: https://gcc.gnu.org/viewcvs?rev=261697&root=gcc&view=rev
Log:
Ensure that control characters in user supplied error and warning messages are
escaped.
PR 84195
* tree.c (escaped_string): New class. Converts an unescaped
string into its escaped equivalent.
(warn_deprecated_use): Use the new class to convert the
deprecation message, if present.
(test_escaped_strings): New self test.
(test_c_tests): Add test_escaped_strings.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree.c
>From gcc-bugs-return-607460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 10:43:44 2018
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Subject: [Bug testsuite/86170] New test case gcc.c-torture/compile/pr84195.c added in r261633 fails
Date: Mon, 18 Jun 2018 10:43:00 -0000
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Nick Clifton <nickc at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Nick Clifton <nickc at gcc dot gnu.org> ---
Hi Guys,
Well this was interesting. The test was in fact performing perfectly.
It was testing for control characters in user warning messages and
failing because gcc was failing to convert them into escape sequences.
The real problem was that for some reason my patch to actually fix
PR 84195 had not been applied to the tree. I am not sure why it had
not gone in, but reapplied it and committed the change, so everything
should be working now.
Cheers
Nick
>From gcc-bugs-return-607461-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 10:58:44 2018
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Subject: [Bug c++/86176] Wnull-dereference warning disappears with a call to std::cout on the line after
Date: Mon, 18 Jun 2018 10:58:00 -0000
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--- Comment #2 from Jonny Grant <jg at jguk dot org> ---
I wonder, is there a way to configure GCC to perform in a way similar to static
analyser? GCC warnings are very useful.
>From gcc-bugs-return-607462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 11:08:17 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86191] New: A missing error message?
Date: Mon, 18 Jun 2018 11:08:00 -0000
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Bug ID: 86191
Summary: A missing error message?
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The code is as follow:
template<int i> struct g {};
template<int i, int j> void f(g<i/j>) { }
template<int i, int j> void f(g<j>) { }
int main()
{
f<4,2>(g<4/2>());
}
When clang++ compiles the code, it produces the following messages:
1gcc01.cpp:8:3: error: call to 'f' is ambiguous
1gcc01.cpp:3:29: note: candidate function [with i = 4, j = 2]
1gcc01.cpp:4:29: note: candidate function [with i = 4, j = 2]
template<int i, int j> void f(g<j>) { }
However, when g++ compiles the code, it does not produce any error messages. Is
the code legal or not? For me, it seems that the messages of clang++ are
reasonable.
>From gcc-bugs-return-607463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 11:11:28 2018
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Subject: [Bug tree-optimization/64946] [AArch64] gcc.target/aarch64/vect-abs-compile.c - "abs" vectorization fails for char/short types
Date: Mon, 18 Jun 2018 11:11:00 -0000
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--- Comment #26 from Wilco <wilco at gcc dot gnu.org> ---
Author: wilco
Date: Mon Jun 18 11:10:51 2018
New Revision: 261698
URL: https://gcc.gnu.org/viewcvs?rev=261698&root=gcc&view=rev
Log:
[testsuite] Remove xfail from vect-abs-compile.c
Since PR64946 has been fixed, we can remove the xfail from this test.
Committed as obvious.
testsuite/
PR tree-optimization/64946
* gcc.target/aarch64/vect-abs-compile.c: Remove xfail.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/aarch64/vect-abs-compile.c
>From gcc-bugs-return-607464-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 11:18:51 2018
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From: "wilco at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64946] [AArch64] gcc.target/aarch64/vect-abs-compile.c - "abs" vectorization fails for char/short types
Date: Mon, 18 Jun 2018 11:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64946
Wilco <wilco at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
CC| |wilco at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #27 from Wilco <wilco at gcc dot gnu.org> ---
Fixed and test updated.
>From gcc-bugs-return-607465-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 11:19:42 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86192] New: A not fully fixed bug?
Date: Mon, 18 Jun 2018 11:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86192
Bug ID: 86192
Summary: A not fully fixed bug?
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
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Assignee: unassigned at gcc dot gnu.org
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A previous bug report (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70377)
complains that g++ produces errors given a piece of valid code. The code is as
follow:
#include <array>
#include <cstddef>
#include <exception>
template <std::size_t N>
constexpr size_t simple_find(const std::array<int, N> &arg_array,
const int &arg_value
) {
for (size_t ctr = 0; ctr != N; ++ctr) {
if ( arg_array[ ctr ] == arg_value ) {
return ctr;
}
}
throw std::out_of_range( "" );
}
static constexpr std::array<int, 3> some_ints { { 10, 11 } };
static_assert( simple_find( some_ints, 10 ) == static_cast<size_t>( 0 ), "" );
static_assert( simple_find( some_ints, 11 ) == static_cast<size_t>( 1 ), "" );
int main() { }
It is said that the bug is fixed since 6.1.0. I used the latest g++ to compile
the code, but it still produces many errors.
BTW, clang++ compiles the above code without any error messages. Is this bug
fully fixed?
>From gcc-bugs-return-607466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 11:26:52 2018
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Subject: [Bug c++/86192] A not fully fixed bug?
Date: Mon, 18 Jun 2018 11:26:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You didn't read Bug 70377 comment 2.
*** This bug has been marked as a duplicate of bug 80061 ***
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Subject: [Bug c++/80061] error on constexpr function with an unevaluated throw
Date: Mon, 18 Jun 2018 11:26:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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CC| |zhonghao at pku dot org.cn
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 86192 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 11:34:52 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86193] New: A recurring bug?
Date: Mon, 18 Jun 2018 11:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86193
Bug ID: 86193
Summary: A recurring bug?
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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The code is as follow:
template <class T>
struct identity
{
typedef T type;
};
template <class T, typename T::type A>
struct foo {};
template <class T, T A>
struct foo<identity<T>, A> {};
int main()
{
foo<identity<int>,0> bar; // error here
}
It comes from a previous bug report
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44753).
It says that the code compiles on gcc-4.2/4.3/4.4, but does not compile on
gcc-4.5. It was fixed as Richard Biener said.
I tried the latest g++, but it does not accept the code. BTW, clang++ accepts
the code. Is this a recurring bug?
>From gcc-bugs-return-607468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 11:34:09 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/86188] Enhancement to std::merge, constexpr check of iterator types
Date: Mon, 18 Jun 2018 11:34:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See Bug 65861 which looks relevant, especially Bug 65861 comment 9
>From gcc-bugs-return-607470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 11:37:38 2018
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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86194] New: [8/9 Regression] ICE: SIGSEGV in avoid_constant_pool_reference (simplify-rtx.c:215) with -O -g -mavx512bw
Date: Mon, 18 Jun 2018 11:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86194
Bug ID: 86194
Summary: [8/9 Regression] ICE: SIGSEGV in
avoid_constant_pool_reference (simplify-rtx.c:215)
with -O -g -mavx512bw
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 44290
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44290&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -g -mavx512bw testcase.c -wrapper
valgrind,-q,--num-callers=50
==30755== Invalid read of size 2
==30755== at 0xCE11AB: avoid_constant_pool_reference(rtx_def*)
(simplify-rtx.c:215)
==30755== by 0xCD20BC: simplify_binary_operation(rtx_code, machine_mode,
rtx_def*, rtx_def*) (simplify-rtx.c:2162)
==30755== by 0xCD5559: simplify_gen_binary(rtx_code, machine_mode, rtx_def*,
rtx_def*) (simplify-rtx.c:194)
==30755== by 0x1004FAB: adjust_mems(rtx_def*, rtx_def const*, void*)
(var-tracking.c:1137)
==30755== by 0xCE3C17: simplify_replace_fn_rtx(rtx_def*, rtx_def const*,
rtx_def* (*)(rtx_def*, rtx_def const*, void*), void*) (simplify-rtx.c:429)
==30755== by 0xCE3413: simplify_replace_fn_rtx(rtx_def*, rtx_def const*,
rtx_def* (*)(rtx_def*, rtx_def const*, void*), void*) (simplify-rtx.c:553)
==30755== by 0xFFF255: adjust_mem_uses(rtx_def**, void*)
(var-tracking.c:1160)
==30755== by 0x1001EC8: adjust_insn(basic_block_def*, rtx_insn*) [clone
.isra.88] (var-tracking.c:1272)
==30755== by 0x101404A: vt_initialize() (var-tracking.c:10198)
==30755== by 0x101B1B7: variable_tracking_main_1 (var-tracking.c:10435)
==30755== by 0x101B1B7: variable_tracking_main (var-tracking.c:10488)
==30755== by 0x101B1B7: (anonymous
namespace)::pass_variable_tracking::execute(function*) (var-tracking.c:10525)
==30755== by 0xBDA4A3: execute_one_pass(opt_pass*) (passes.c:2446)
==30755== by 0xBDADD7: execute_pass_list_1(opt_pass*) (passes.c:2535)
==30755== by 0xBDADE9: execute_pass_list_1(opt_pass*) (passes.c:2536)
==30755== by 0xBDADE9: execute_pass_list_1(opt_pass*) (passes.c:2536)
==30755== by 0xBDAE34: execute_pass_list(function*, opt_pass*)
(passes.c:2546)
==30755== by 0x8416ED: cgraph_node::expand() (cgraphunit.c:2119)
==30755== by 0x842C3A: expand_all_functions (cgraphunit.c:2255)
==30755== by 0x842C3A: symbol_table::compile() [clone .part.55]
(cgraphunit.c:2606)
==30755== by 0x845597: compile (cgraphunit.c:2665)
==30755== by 0x845597: symbol_table::finalize_compilation_unit()
(cgraphunit.c:2699)
==30755== by 0xD06E6D: compile_file() (toplev.c:479)
==30755== by 0x688539: do_compile (toplev.c:2086)
==30755== by 0x688539: toplev::main(int, char**) (toplev.c:2221)
==30755== by 0x68AADA: main (main.c:39)
==30755== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==30755==
during RTL pass: vartrack
testcase.c: In function 'foo':
testcase.c:20:1: internal compiler error: Segmentation fault
}
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-261695-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-261695-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
gcc version 9.0.0 20180618 (experimental) (GCC)
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Subject: [Bug tree-optimization/64946] [AArch64] gcc.target/aarch64/vect-abs-compile.c - "abs" vectorization fails for char/short types
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
>From gcc-bugs-return-607472-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 11:52:57 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 c++/86193] [7/8/9 Regression] A recurring bug?
Date: Mon, 18 Jun 2018 11:52:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Known to work| |6.4.0
Version|unknown |8.1.0
Target Milestone|--- |7.4
Summary|A recurring bug? |[7/8/9 Regression] A
| |recurring bug?
>From gcc-bugs-return-607473-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 11:53:13 2018
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Subject: [Bug target/86194] [8/9 Regression] ICE: SIGSEGV in avoid_constant_pool_reference (simplify-rtx.c:215) with -O -g -mavx512bw
Date: Mon, 18 Jun 2018 11:53:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Priority|P3 |P2
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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++/86190] [6/7/8/9 Regression]-Wsign-conversion ignores explicit conversion in some cases
Date: Mon, 18 Jun 2018 11:57:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Known to work| |5.5.0
Summary|-Wsign-conversion ignores |[6/7/8/9
|explicit conversion in some |Regression]-Wsign-conversio
|cases |n ignores explicit
| |conversion in some cases
Known to fail| |6.4.0, 7.3.0, 8.1.0, 9.0
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The manual does say that an explicit cast should silence the warning. This is a
regression since GCC 5, and only seems to happen when there's an indirection
through a typedef:
using size_t = unsigned long;
template<typename T> struct vector {
using size_type = size_t;
size_type size();
};
struct A
{
int var;
vector<int> vec;
bool func()
{
return vec.size() < static_cast<size_t>(var);
}
};
int main()
{
A a;
a.func();
}
>From gcc-bugs-return-607475-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 11:59:19 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++/86190] [6/7/8/9 Regression] -Wsign-conversion ignores explicit conversion in some cases
Date: Mon, 18 Jun 2018 11:59:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Further reduced:
typedef unsigned long size_t;
struct vector {
typedef size_t size_type;
size_type size();
};
bool func(vector vec, int var)
{
return vec.size() < static_cast<size_t>(var);
}
sc.cc: In function 'bool func(vector, int)':
sc.cc:10:23: warning: conversion to 'vector::size_type {aka long unsigned int}'
from 'int' may change the sign of the result [-Wsign-conversion]
return vec.size() < static_cast<size_t>(var);
^~~~~~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-607476-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 12:01:09 2018
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Subject: [Bug c++/86176] Wnull-dereference warning disappears with a call to std::cout on the line after
Date: Mon, 18 Jun 2018 12:01:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
No, because GCC is not a static analyser.
>From gcc-bugs-return-607477-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 12:02:17 2018
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Subject: [Bug c++/86177] Wnull-dereference warning for object file compile missing
Date: Mon, 18 Jun 2018 12:02:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Lots of functions have such requirements and make it the caller's
responsibility to meet those requirements.
GCC is not a static analyser, you can't expect warnings about every possible
bug in your code.
>From gcc-bugs-return-607478-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 12:11:10 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++/86193] [7/8/9 Regression] A recurring bug?
Date: Mon, 18 Jun 2018 12:11:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-18
CC| |jason at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to zhonghao from comment #0)
> I tried the latest g++, but it does not accept the code. BTW, clang++
> accepts the code. Is this a recurring bug?
No, it's rejected for a different reason, so it's not the same bug.
It started to be rejected with r243868:
Check that a partial specialization is more specialized.
* pt.c (process_partial_specialization): Use
get_partial_spec_bindings to check that the partial specialization
is more specialized than the primary template.
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Subject: [Bug c++/86190] [6/7/8/9 Regression] -Wsign-conversion ignores explicit conversion in some cases
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86190
Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This regressed with r230365 "Merge C++ delayed folding branch."
>From gcc-bugs-return-607480-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 12:17:50 2018
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From: "wilco at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86076] [7/8 Regression] ICE: verify_gimple failed (error: location references block not in block tree)
Date: Mon, 18 Jun 2018 12:17:00 -0000
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--- Comment #7 from Wilco <wilco at gcc dot gnu.org> ---
Author: wilco
Date: Mon Jun 18 12:17:10 2018
New Revision: 261699
URL: https://gcc.gnu.org/viewcvs?rev=261699&root=gcc&view=rev
Log:
[testsuite] Add target pthread to pr86076.c
Add missing target pthread to ensure test doesn't fail on bare-metal
targets. Committed as obvious.
testsuite/
PR tree-optimization/86076
* gcc.dg/pr86076.c: Add target pthread for bare-metal targets.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pr86076.c
>From gcc-bugs-return-607481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 12:21:15 2018
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Subject: [Bug c++/86184] Shall gcc support this feature?
Date: Mon, 18 Jun 2018 12:21:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to zhonghao from comment #0)
> gcc++ produces errors when compiling the following code:
I don't see any errors. You didn't say which version of GCC you're using or
what options you're using, as requested by https://gcc.gnu.org/bugs/
>From gcc-bugs-return-607482-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 12:23:24 2018
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Subject: [Bug c++/86185] gcc does not reject the ill-formed code
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please search for duplicates before copying every clang bug into our bugzilla,
this is already known.
*** This bug has been marked as a duplicate of bug 79009 ***
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Subject: =?UTF-8?B?W0J1ZyBjKysvNzkwMDldIE1pc3NpbmcgJ2luY29uc2lzdGVudCBkZWR1Y3Rp?= =?UTF-8?B?b24gZm9yIOKAmGF1dG/igJknIGVycm9yIHdoZW4gaGF2aW5nIGEgZGVwZW5k?= =?UTF-8?B?ZW50IGluaXRpYWxpemVyIGFuZCBhIG5vbmRlcGVuZGVudCBvbmUgaW4gdGhl?= =?UTF-8?B?IHNhbWUgZGVjbGFyYXRpb24=?Date: Mon, 18 Jun 2018 12:23:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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CC| |zhonghao at pku dot org.cn
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 86185 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 12:28:46 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86183] Scoped enumeration instantiated even if not required
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The definition of a member scoped enumaration type should not be instantiated
by the implicit instantiation of the class template.
>From gcc-bugs-return-607485-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 12:31:44 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 libstdc++/86189] not equal allocators not behaving as expected
Date: Mon, 18 Jun 2018 12:31:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Rian Quinn from comment #0)
> template <typename T1, typename T2>
> bool operator==(const myallocator4<T1> &, const myallocator4<T2> &)
> { return false; }
>
> template <typename T1, typename T2>
> bool operator!=(const myallocator4<T1> &, const myallocator4<T2> &)
> { return true; }
Your allocators *always* compare unequal to all other instances of the same
allocator. This is invalid, a copy-constructed allocator must compare equal to
the original, and be able to deallocate its memory.
I haven't analysed any further, but I assume that the containers are using a
copy to deallocate, which is perfectly fine. If you think the problem lies
elsewhere please reopen this.
>From gcc-bugs-return-607487-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 12:33:33 2018
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Subject: [Bug libstdc++/86189] not equal allocators not behaving as expected
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Rian Quinn from comment #0)
> template <typename U>
> myallocator4(const myallocator4<U> &other) noexcept
> { (void) other; }
You know you can just not name a parameter, instead of casting it to void?
template <typename U>
myallocator4(const myallocator4<U> &) noexcept
{ }
>From gcc-bugs-return-607486-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 12:33:06 2018
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From: "yves.vandriessche at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/27557] OpenMP threadprivate directive does not work with non-POD types
Date: Mon, 18 Jun 2018 12:33:00 -0000
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Yves Vandriessche <yves.vandriessche at intel dot com> changed:
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----------------------------------------------------------------------------
CC| |yves.vandriessche at intel dot com
--- Comment #18 from Yves Vandriessche <yves.vandriessche at intel dot com> ---
As mentioned by Sameer, thread_local now works, but the threadprivate OpenMP
directive still fails with a "declared 'threadprivate' after first use" error.
My test fragment, is as follows. It should only print a single "ctor" and twice
the same set of distinct pointers:
#include <cstdio>
#include <omp.h>
struct Foo {
Foo() {puts("ctor");}
int a;
};
int bar() {
int sum=0;
// // alternative to omp threadprivate, works with gcc
// thread_local Foo local;
#pragma omp parallel reduction(+:sum)
{
static Foo local;
#pragma omp threadprivate(local)
local.a = omp_get_thread_num();
printf("%p\n", &local);
sum += local.a;
}
printf("%d\n", sum);
return sum;
}
int main(int argc, char** argv) {
bar();
bar();
return 0;
}
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/86189] not equal allocators not behaving as expected
Date: Mon, 18 Jun 2018 12:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86189
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> Your allocators *always* compare unequal to all other instances of the same
> allocator. This is invalid, a copy-constructed allocator must compare equal
> to the original, and be able to deallocate its memory.
See the rows defining equality comparison and copy construction at
http://en.cppreference.com/w/cpp/named_req/Allocator#Requirements
Allocator propagation rules do not mean that the same specific instance of the
allocator must be used for all allocations and deallocation, only one that
compares equal to the original one. With your allocator that's obviously
impossible, because no allocators ever compare equal (even when you compare an
allocator to itself!)
Stateful allocators need to be a lightweight handle for some allocation
resource managed elsewhere, and two allocators compare equal if they use the
same resource. That means that you should never depend on the identity (i.e.
address) of allocator objects, only on their equivalence (as determined by
operator==).
Having looked at your code further, the test is simply completely broken. When
an allocator propagates on copy assignment the allocator gets assigned, so that
the "value" of the new allocator replaces the "value" of the old allocator.
That doesn't change the allocator's address. The object still has the same
address, it just gets a new "value". But your allocators don't have any "value"
they only care about their identity (i.e. address). This report is INVALID.
(In reply to Jonathan Wakely from comment #2)
> You know you can just not name a parameter, instead of casting it to void?
Ah yes, I see you've done that elsewhere.
>From gcc-bugs-return-607489-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 12:52:24 2018
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Subject: [Bug target/81084] [8 Regression] powerpcspe port full of confusing configury / command-line options not related to SPE
Date: Mon, 18 Jun 2018 12:52:00 -0000
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--- Comment #61 from Andrew Jenner <andrewjenner at gcc dot gnu.org> ---
Sorry, once again I have been totally swamped by other work. It's now looking
like I should have some time to work on this in early July.
>From gcc-bugs-return-607490-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 12:59:50 2018
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Subject: [Bug c++/86191] A missing error message?
Date: Mon, 18 Jun 2018 12:59:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2018-06-18
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
GCC seems to treat the first overload as more specialized and calls that one. I
think that's a bug.
>From gcc-bugs-return-607491-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 13:01:18 2018
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Subject: [Bug c++/86191] A missing error message?
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This changed with GCC 4.5, it was ambiguous before then.
>From gcc-bugs-return-607492-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 13:08:39 2018
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Subject: [Bug c++/86182] [8/9 Regression] gcc crashes when compiling the code
Date: Mon, 18 Jun 2018 13:08:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|accepts-invalid, |ice-on-valid-code,
|ice-on-invalid-code |rejects-valid
CC| |jason at gcc dot gnu.org
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think the code is valid, so we regressed from rejects-valid to
ice-on-valid-code at r253600
Various small C++ fixes.
* typeck.c (condition_conversion): Assert
!processing_template_decl.
* semantics.c (finish_omp_clauses): Don't
fold_build_cleanup_point_expr if processing_template_decl.
(outer_var_p): A temporary can't be from an outer scope.
* pt.c (type_dependent_expression_p): Fix dependency checking of
functions without DECL_TEMPLATE_INFO.
(instantiate_decl): Use lss_copy.
* constexpr.c (is_valid_constexpr_fn): Fix lambdas before C++17.
>From gcc-bugs-return-607493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 13:25:02 2018
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Subject: [Bug c++/86191] [6/7/8/9 Regression] A missing error message?
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
Known to work| |4.4.7
Summary|A missing error message? |[6/7/8/9 Regression] A
| |missing error message?
Known to fail| |4.5.0, 6.4.0, 7.3.0, 8.1.0,
| |9.0
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It stopped being ambiguous with r153957
PR c++/41703
* pt.c (check_undeduced_parms): New subroutine of...
(more_specialized_fn): ...here. Undeduced template parms can make
a template less specialized than another.
>From gcc-bugs-return-607494-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 13:31:02 2018
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Subject: [Bug c++/78925] Inline friend template function not hidden during ADL
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is not a bug.
*** This bug has been marked as a duplicate of bug 86074 ***
>From gcc-bugs-return-607495-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 13:31:06 2018
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Subject: [Bug c++/86074] gcc fails to compile a code sample
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----------------------------------------------------------------------------
CC| |bluescarni at gmail dot com
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 78925 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 13:31:55 2018
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Subject: [Bug c++/86180] Friend function definition not instantiated in certain circumstances
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86180
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
An almost exact duplicate.
*** This bug has been marked as a duplicate of bug 82204 ***
>From gcc-bugs-return-607496-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 13:31:54 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++/82204] G++ doesn't connect friend and extern declarations
Date: Mon, 18 Jun 2018 13:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82204
Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |zhonghao at pku dot org.cn
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 86180 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607498-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 13:32:18 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/82204] G++ doesn't connect friend and extern declarations
Date: Mon, 18 Jun 2018 13:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82204
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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>From gcc-bugs-return-607499-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 13:34:02 2018
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From: "d.khalikov at partner dot samsung.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/80414] [UBSAN] segfault with -fsanitize=undefined
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80414
Denis Khalikov <d.khalikov at partner dot samsung.com> changed:
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--- Comment #2 from Denis Khalikov <d.khalikov at partner dot samsung.com> ---
Fixed.
>From gcc-bugs-return-607500-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 13:44:19 2018
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From: "rianquinn at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86189] not equal allocators not behaving as expected
Date: Mon, 18 Jun 2018 13:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86189
--- Comment #4 from Rian Quinn <rianquinn at gmail dot com> ---
Nope, I think that is the root of the issue. Where exactly does the spec
state that as this is the first I have heard of this.
Thanks a ton,
- Rian
On Mon, Jun 18, 2018 at 6:31 AM, redi at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86189
>
> Jonathan Wakely <redi at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ------------------------------------------------------------
> ----------------
> Status|UNCONFIRMED |WAITING
> Last reconfirmed| |2018-06-18
> Ever confirmed|0 |1
>
> --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> (In reply to Rian Quinn from comment #0)
> > template <typename T1, typename T2>
> > bool operator==(const myallocator4<T1> &, const myallocator4<T2> &)
> > { return false; }
> >
> > template <typename T1, typename T2>
> > bool operator!=(const myallocator4<T1> &, const myallocator4<T2> &)
> > { return true; }
>
> Your allocators *always* compare unequal to all other instances of the same
> allocator. This is invalid, a copy-constructed allocator must compare
> equal to
> the original, and be able to deallocate its memory.
>
> I haven't analysed any further, but I assume that the containers are using
> a
> copy to deallocate, which is perfectly fine. If you think the problem lies
> elsewhere please reopen this.
>
> --
> You are receiving this mail because:
> You reported the bug.
>From gcc-bugs-return-607501-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 14:01:54 2018
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From: "paolo.monteverde at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86195] New: Ref-qualified nested class member function issue
Date: Mon, 18 Jun 2018 14:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86195
Bug ID: 86195
Summary: Ref-qualified nested class member function issue
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: paolo.monteverde at gmail dot com
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#include <utility>
template<typename T>
struct A final {
struct B final {
template<typename P, typename... Args>
void foo(Args &&... args) && {
A::foo<P>(std::forward<Args>(args)...);
}
};
private:
template<typename P, typename... Args>
static auto foo(Args &&...) {}
};
int main() {
A<int>::B{}.foo<int>();
}
This code doesn't compile under GCC 8.1.1; it works on GCC 7.3.
If you rename the private static foo() member function (and its invocation) to
a name different than foo, the code will compile on GCC 8.1.1 too.
>From gcc-bugs-return-607502-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 14:13:21 2018
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From: "zenith432 at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/86175] LTO code generator does not respect ld -u option to force symbol inclusion in the link product
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
With ld 2.30 it seems to work for me with a simple
void foo () {}
int main() { return 0; }
> gcc-8 t.c -flto -O -Wl,-u,foo,--gc-sections -ffunction-sections
--- Comment #2 from zenith432 at users dot sourceforge.net ---
It's the visibility that breaks it.
Try
gcc-8 t.c -flto -O -Wl,-u,foo,--gc-sections -ffunction-sections
-fvisibility=hidden
Here's a full summary of observed behavior
Without '-u foo', foo gets discarded for both LTO, non-LTO build and with any
visibility.
With '-u foo'
On non-LTO build, foo always gets forced in regardless of visibility. The
symbol's visibility is not supposed to play a role in the decision-making of
applying the '-u foo'.
On LTO build
- if foo's visibility is either default or protected, it gets forced in.
- if foo's visibility is either hidden or internal, it gets discarded.
The reason I opened this bug against GCC and not LD - is that LD does not
complain about an undefined foo even if '--require-defined=foo' is used in
place of '-u foo'. LD believes it is force-including foo, but really gets an
empty blob from the LTO plugin for foo.
>From gcc-bugs-return-607503-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 14:49:17 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/86189] not equal allocators not behaving as expected
Date: Mon, 18 Jun 2018 14:49:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
[allocator.requirements]
>From gcc-bugs-return-607504-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 14:58:50 2018
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/86175] LTO code generator does not respect ld -u option to force symbol inclusion in the link product
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
> but really gets an empty blob from the LTO plugin for foo.
Are you sure about this? Compiling with -save-temps shows that the symbol is
present in GCC's assembly output; specifying --print-gc-sections also shows
that the linker is discarding it:
/usr/bin/ld.bfd: Removing unused section '.text.KeepMe' in file
'/tmp/ccWbtSKK.ltrans0.ltrans.o'
Gold linker does not exhibit this (try -fuse-ld=gold). Can you report it
against the BFD linker at sourceware.org/bugzilla?
>From gcc-bugs-return-607505-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 15:17:33 2018
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From: "sbergman at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86196] New: Bogus -Wrestrict on memcpy
Date: Mon, 18 Jun 2018 15:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86196
Bug ID: 86196
Summary: Bogus -Wrestrict on memcpy
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: sbergman at redhat dot com
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With recent trunk (on Linux x86_64), and doesn't seem to be covered by existing
bugs referenced from meta bug 84774:
> $ gcc --version
> gcc (GCC) 9.0.0 20180618 (experimental)
> Copyright (C) 2018 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> $ cat test.c
> #include <string.h>
> struct S {
> int n;
> void * p;
> };
> void f(struct S * a, size_t n) {
> size_t i = 0, j = 0;
> for (; i != n; ++i) {
> if (a[i].n == 0) {
> if (i != j) {
> memcpy(&a[j], &a[i], sizeof (struct S));
> }
> ++j;
> }
> }
> }
> $ gcc -Wall -c test.c
> test.c: In function ‘f’:
> test.c:11:17: warning: ‘memcpy’ accessing 16 bytes at offsets [0, 8] and [0, 8] overlaps between 8 and 16 bytes at offset [0, 8] [-Wrestrict]
> memcpy(&a[j], &a[i], sizeof (struct S));
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Also, I do not understand what that "offset [0, 8]" notation is supposed to
mean.
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Subject: [Bug target/86197] New: POWERPC: float128 parameter passing
Date: Mon, 18 Jun 2018 15:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86197
Bug ID: 86197
Summary: POWERPC: float128 parameter passing
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
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Float128 should be considered qualified vector arguments and should be passed
in vector registers for homogeneous aggregates of up to 8 members.
Currently for homogeneous aggregates of 5+, they are being passed via the
stack.
$ cat a.c
struct E5 {
__float128 a[5];
};
__float128 testfp128_05(struct E5 a) {
return a.a[4];
}
Generated asm:
testfp128_05:
std 3,32(1)
std 4,40(1)
std 5,48(1)
std 6,56(1)
std 7,64(1)
std 8,72(1)
std 9,80(1)
std 10,88(1)
lxv 34,96(1)
blr
Compiler version:
gcc (GCC) 7.3.0
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Subject: [Bug target/86197] POWERPC: float128 parameter passing
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |meissner at gcc dot gnu.org,
| |segher at gcc dot gnu.org,
| |wschmidt at gcc dot gnu.org
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>From gcc-bugs-return-607508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 15:29:50 2018
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Subject: [Bug target/86197] POWERPC: float128 parameter passing
Date: Mon, 18 Jun 2018 15:29:00 -0000
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--- Comment #1 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Note, this is restricted to powerpc64le using ELFv2 ABI.
>From gcc-bugs-return-607509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 15:49:11 2018
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Subject: [Bug target/86197] POWERPC: float128 parameter passing
Date: Mon, 18 Jun 2018 15:49:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed. Mine.
>From gcc-bugs-return-607510-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 16:03:44 2018
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Subject: [Bug c++/86195] Ref-qualified nested class member function issue
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This started to fail on trunk with r251438
It seems to have been fixed on the gcc-8-branch though. 8.1.1 is not a release,
we need to know exactly which version you're using (as requested by
https://gcc.gnu.org/bugs/ when submitting a new bug report).
>From gcc-bugs-return-607511-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 16:12:45 2018
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Subject: [Bug c++/86195] Ref-qualified nested class member function issue
Date: Mon, 18 Jun 2018 16:12:00 -0000
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--- Comment #2 from Paolo Monteverde <paolo.monteverde at gmail dot com> ---
(In reply to Jonathan Wakely from comment #1)
> This started to fail on trunk with r251438
>
> It seems to have been fixed on the gcc-8-branch though. 8.1.1 is not a
> release, we need to know exactly which version you're using (as requested by
> https://gcc.gnu.org/bugs/ when submitting a new bug report).
I spotted the original error on g++ (GCC) 8.1.1 20180531 running on Arch Linux.
The simplified example above is failing on
https://wandbox.org/permlink/VMBVdHgzkcH2xLlb. The only needed option is
-std=c++14 or above.
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Subject: [Bug tree-optimization/81384] built-in form of strnlen missing
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Mon Jun 18 16:32:59 2018
New Revision: 261705
URL: https://gcc.gnu.org/viewcvs?rev=261705&root=gcc&view=rev
Log:
PR tree-optimization/81384 - built-in form of strnlen missing
gcc/ChangeLog:
PR tree-optimization/81384
* builtin-types.def (BT_FN_SIZE_CONST_STRING_SIZE): New.
* builtins.c (expand_builtin_strnlen): New function.
(expand_builtin): Call it.
(fold_builtin_n): Avoid setting TREE_NO_WARNING.
* builtins.def (BUILT_IN_STRNLEN): New.
* calls.c (maybe_warn_nonstring_arg): Handle BUILT_IN_STRNLEN.
Warn for bounds in excess of maximum object size.
* tree-ssa-strlen.c (maybe_set_strlen_range): Return tree representing
single-value ranges. Handle strnlen.
(handle_builtin_strlen): Handle strnlen.
(strlen_check_and_optimize_stmt): Same.
* doc/extend.texi (Other Builtins): Document strnlen.
gcc/testsuite/ChangeLog:
PR tree-optimization/81384
* gcc.c-torture/execute/builtins/lib/strnlen.c: New test.
* gcc.c-torture/execute/builtins/strnlen-lib.c: New test.
* gcc.c-torture/execute/builtins/strnlen.c: New test.
* gcc.dg/attr-nonstring-2.c: New test.
* gcc.dg/attr-nonstring-3.c: New test.
* gcc.dg/attr-nonstring-4.c: New test.
* gcc.dg/strlenopt-45.c: New test.
* gcc.dg/strlenopt.h (strnlen): Declare.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/builtins/lib/strnlen.c
trunk/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen-lib.c
trunk/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c
trunk/gcc/testsuite/gcc.dg/attr-nonstring-2.c
trunk/gcc/testsuite/gcc.dg/attr-nonstring-3.c
trunk/gcc/testsuite/gcc.dg/attr-nonstring-4.c
trunk/gcc/testsuite/gcc.dg/strlenopt-45.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtin-types.def
trunk/gcc/builtins.c
trunk/gcc/builtins.def
trunk/gcc/calls.c
trunk/gcc/doc/extend.texi
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/attr-nonstring-3.c
trunk/gcc/testsuite/gcc.dg/strlenopt.h
trunk/gcc/tree-ssa-strlen.c
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/81384] built-in form of strnlen missing
Date: Mon, 18 Jun 2018 16:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81384
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Implemented in r261705.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/83819] [meta-bug] missing strlen optimizations
Date: Mon, 18 Jun 2018 16:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83819
Bug 83819 depends on bug 81384, which changed state.
Bug 81384 Summary: built-in form of strnlen missing
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81384
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-607515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 16:39:14 2018
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From: "zenith432 at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/86175] LTO code generator does not respect ld -u option to force symbol inclusion in the link product
Date: Mon, 18 Jun 2018 16:39:00 -0000
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zenith432 at users dot sourceforge.net changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from zenith432 at users dot sourceforge.net ---
Done.
https://sourceware.org/bugzilla/show_bug.cgi?id=23309
>From gcc-bugs-return-607516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 17:35:54 2018
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86171] [6/7/8/9 Regression] g++ ICE on valid code: tree check: expected var_decl or function_decl, have type_decl in duplicate_decls, at cp/decl.c:2291
Date: Mon, 18 Jun 2018 17:35:00 -0000
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
A well-formed variant:
template <class> struct A;
template <class T> using B = typename A<T>::X;
template <class T> struct A {
typedef int X;
typedef B<T> U;
};
B<short> b;
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From: "d.khalikov at partner dot samsung.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/86198] New: Libbacktrace does not properly work with ".note.gnu.build-id" section
Date: Mon, 18 Jun 2018 17:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86198
Bug ID: 86198
Summary: Libbacktrace does not properly work with
".note.gnu.build-id" section
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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An error happens when libbacktrace is reading ".note.gnu.build-id" section and
effects the feature which allows to read stripped debuginfo with build-id.
Steps to reproduce:
(I will use libasan in my test case, because it's easy and libbacktrace is a
default symbolizer for libasan in GCC).
1.$cat a.cc
int main () {
int *ptr = new int[1];
return ptr[1];
}
2.$g++ -o a a.cc -fsanitize=address -g
-Wl,--build-id=0x0123456789abcdef0123456789abcdef01234567
3.$objcopy --only-keep-debug a a.debug
4.$strip a
5. In this step we need a superuser rights:
#mkdir /usr/lib/debug/.build-id/01
#ln -s `pwd`/a.debug
/usr/lib/debug/.build-id/01/23456789abcdef0123456789abcdef01234567.debug
6. ./a
output:
...
#0 0x4007cf (/path/to/exe/a+0x4007cf)
...
The problem at the libbacktrace/elf.c line 2871
2866 buildid_view_valid = 1;
2867 note = (const b_elf_note *) buildid_view.data;
2868 if (note->type == NT_GNU_BUILD_ID
2869 && note->namesz == 4
2870 && strncmp (note->name, "GNU", 4) == 0
2871 && shdr->sh_size < 12 + ((note->namesz + 3) & ~ 3) +
note->descsz)
2872 {
2873 buildid_data = ¬e->name[0] + ((note->namesz + 3) & ~ 3);
2874 buildid_size = note->descsz;
2875 }
2876 }
The size for the ".note.gnu.build-id" section by default is 36 bytes (12 + 4 +
20)
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/developer_guide/compiling-build-id
So, the cmp on line 2871 should be changed from less to less or equal
2871 && shdr->sh_size <= 12 + ((note->namesz + 3) & ~ 3) +
note->descsz)
>From gcc-bugs-return-607518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 17:55:27 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++/86195] [9 Regression] Ref-qualified nested class member function issue
Date: Mon, 18 Jun 2018 17:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86195
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Known to work| |7.3.0, 8.1.1
Summary|Ref-qualified nested class |[9 Regression]
|member function issue |Ref-qualified nested class
| |member function issue
Known to fail| |8.1.0, 9.0
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It seems to be fixed in (In reply to Paolo Monteverde from comment #2)
> I spotted the original error on g++ (GCC) 8.1.1 20180531 running on Arch
> Linux.
OK, it seems to be fixed in 8.1.1 20180615
> The simplified example above is failing on
> https://wandbox.org/permlink/VMBVdHgzkcH2xLlb. The only needed option is
> -std=c++14 or above.
That's 8.1.0, which is even older.
I'll try to find what fixed it on the branch.
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Subject: [Bug tree-optimization/86199] New: warn on calls to strlen with same argument as in strnlen
Date: Mon, 18 Jun 2018 18:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86199
Bug ID: 86199
Summary: warn on calls to strlen with same argument as in
strnlen
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
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The the call to strlen() in the test case below is most likely unsafe because
the subsequent call to strnlen() suggests that the array need not be
nul-terminated. If it is nul-terminated, then the call to strnlen() can be
replaced by strlen(). Either way, the code looks suspicious and diagnosing it
would be helpful.
$ cat c.c && gcc -O2 -S -Wall -Wextra c.c
char a[4];
unsigned n0, n1;
void f (void)
{
n0 = __builtin_strlen (a); // possibly unsafe?
// ...
n1 = __builtin_strnlen (a, sizeof a); // could be replaced by strlen()?
}
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86199] warn on calls to strlen with same argument as in strnlen
Date: Mon, 18 Jun 2018 18:03:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-18
Ever confirmed|0 |1
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Subject: [Bug tree-optimization/86199] warn on calls to strlen with same argument as in strnlen
Date: Mon, 18 Jun 2018 18:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86199
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Severity|normal |enhancement
>From gcc-bugs-return-607522-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 18:17:14 2018
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Subject: [Bug c++/86171] [6/7/8/9 Regression] g++ ICE on valid code: tree check: expected var_decl or function_decl, have type_decl in duplicate_decls, at cp/decl.c:2291
Date: Mon, 18 Jun 2018 18:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86171
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun 18 18:16:38 2018
New Revision: 261709
URL: https://gcc.gnu.org/viewcvs?rev=261709&root=gcc&view=rev
Log:
PR c++/86171 - ICE with recursive alias instantiation.
* pt.c (tsubst_decl): Handle recursive alias instantiation.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/alias-decl-65.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
>From gcc-bugs-return-607523-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 18:19:57 2018
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Subject: [Bug c++/86171] [6/7/8/9 Regression] g++ ICE on valid code: tree check: expected var_decl or function_decl, have type_decl in duplicate_decls, at cp/decl.c:2291
Date: Mon, 18 Jun 2018 18:19:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|6.5 |9.0
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 9, not worth backporting since it already worked in release mode.
>From gcc-bugs-return-607524-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 18:32:35 2018
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Subject: [Bug target/71659] _xgetbv intrinsic missing
Date: Mon, 18 Jun 2018 18:32:00 -0000
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--- Comment #3 from Jeffrey Walton <noloader at gmail dot com> ---
(In reply to postmaster from comment #2)
> Portability is one main reason to add missing intrinsics... with combination
> of cpuid check and _xgetbv() we can cleanly check if AVX or MPX is available
> at run-time. We can also check specific instructions during configure
> process to see if we need to add workarounds for bad or missing
> functions/intrinsics.
+1. We were trying to use Intel's algorithm described at
https://software.intel.com/en-us/blogs/2011/04/14/is-avx-enabled . We should
only need __get_cpuid and _xgetbv. We should not need that nasty GCC inline
assembly.
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Subject: [Bug target/85905] cannot build for netbsd/alpha (with patch)
Date: Mon, 18 Jun 2018 18:34:00 -0000
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coypu <coypu at sdf dot org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from coypu <coypu at sdf dot org> ---
Committed in revision 261707.
>From gcc-bugs-return-607526-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 18:41:26 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86200] New: [8/9 Regression] ICE in dependent_type_p, at cp/pt.c:24634
Date: Mon, 18 Jun 2018 18:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86200
Bug ID: 86200
Summary: [8/9 Regression] ICE in dependent_type_p, at
cp/pt.c:24634
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
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Changed between 20180211 and 20180218.
Derived from g++.dg/cpp0x/lambda/lambda-variadic1.C :
$ cat z1.cc
template<typename ... Args>
static void foo()
{
[](Args, int x) {
x;
};
}
int main()
{
foo();
}
$ gcc-9-20180617 -c z1.cc
z1.cc: In instantiation of 'void foo() [with Args = {}]':
z1.cc:10:7: required from here
z1.cc:4:3: internal compiler error: in dependent_type_p, at cp/pt.c:24634
[](Args, int x) {
^
0x7163e0 dependent_type_p(tree_node*)
../../gcc/cp/pt.c:24634
0x67bff8 require_complete_types_for_parms
../../gcc/cp/decl.c:12556
0x67bff8 check_function_type
../../gcc/cp/decl.c:14722
0x67bff8 start_preparsed_function(tree_node*, tree_node*, int)
../../gcc/cp/decl.c:14936
0x6b2df4 start_lambda_function(tree_node*, tree_node*)
../../gcc/cp/lambda.c:1420
0x71a577 tsubst_lambda_expr(tree_node*, tree_node*, int, tree_node*)
../../gcc/cp/pt.c:17620
0x71b748 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc/cp/pt.c:18928
0x720357 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/cp/pt.c:17396
0x71ede5 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/cp/pt.c:16597
0x7201ec tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/cp/pt.c:16583
0x72005d tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/cp/pt.c:16880
0x71e961 instantiate_decl(tree_node*, bool, bool)
../../gcc/cp/pt.c:24027
0x739e0b instantiate_pending_templates(int)
../../gcc/cp/pt.c:24141
0x698f23 c_parse_final_cleanups()
../../gcc/cp/decl2.c:4707
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Subject: [Bug c++/86201] New: ICE: Error reporting routines re-entered
Date: Mon, 18 Jun 2018 18:44:00 -0000
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Bug ID: 86201
Summary: ICE: Error reporting routines re-entered
Product: gcc
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With option -std=c++11 or newer, down to at least gcc-4.8,
due to a missing return value :
$ cat z1.cc
template <class U, class V>
auto fn1 (V&& v) -> decltype(U(v))
{
return; ///
}
void fn2 ()
{
fn1<bool>(1.0);
}
$ gcc-9-20180617 -c z1.cc
'
Internal compiler error: Error reporting routines re-entered.
0x772d1f cp_build_binary_op(unsigned int, tree_code, tree_node*, tree_node*,
int)
../../gcc/cp/typeck.c:4739
0x66d73b ocp_convert(tree_node*, tree_node*, int, int, int)
../../gcc/cp/cvt.c:836
0x6349c1 convert_like_real
../../gcc/cp/call.c:7118
0x63f07a perform_direct_initialization_if_possible(tree_node*, tree_node*,
bool, int)
../../gcc/cp/call.c:10797
0x775836 build_static_cast_1
../../gcc/cp/typeck.c:7039
0x776497 cp_build_c_cast(tree_node*, tree_node*, int)
../../gcc/cp/typeck.c:7821
0x77e646 build_functional_cast(tree_node*, tree_node*, int)
../../gcc/cp/typeck2.c:2131
0x71bea9 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc/cp/pt.c:17864
0x7292e1 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/cp/pt.c:14899
0x69c900 dump_template_bindings
../../gcc/cp/error.c:397
0x69c900 dump_substitution
../../gcc/cp/error.c:1525
0x69d0f8 dump_substitution
../../gcc/cp/cp-tree.h:5955
0x69d0f8 dump_function_decl
../../gcc/cp/error.c:1681
0x6a2862 decl_to_string
../../gcc/cp/error.c:3056
0x6a2862 cp_printer
../../gcc/cp/error.c:4073
0x12f9eb3 pp_format(pretty_printer*, text_info*)
../../gcc/pretty-print.c:1375
0x12fad10 pp_format_verbatim(pretty_printer*, text_info*)
../../gcc/pretty-print.c:1437
0x12fade4 pp_verbatim(pretty_printer*, char const*, ...)
../../gcc/pretty-print.c:1641
0x69b816 print_instantiation_full_context
../../gcc/cp/error.c:3464
0x69b816 maybe_print_instantiation_context
../../gcc/cp/error.c:3607
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Subject: [Bug c++/86200] [8/9 Regression] ICE in dependent_type_p, at cp/pt.c:24634
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-18
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |8.2
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r257627.
>From gcc-bugs-return-607529-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 18:50:13 2018
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Subject: [Bug c/86202] New: [8/9 Regression] ICE in get_range_info, at tree-ssanames.c:407
Date: Mon, 18 Jun 2018 18:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86202
Bug ID: 86202
Summary: [8/9 Regression] ICE in get_range_info, at
tree-ssanames.c:407
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gscfq@t-online.de
Target Milestone: ---
Changed between 20170820 and 20170910 :
$ cat z1.c
void *memcpy (void *, void *, __SIZE_TYPE__ *);
void *a, *b;
void f (void)
{
long unsigned int c;
memcpy (a, b, c);
}
$ gcc-9-20180617 -c z1.c
z1.c: In function 'f':
z1.c:6:17: warning: passing argument 3 of 'memcpy' makes pointer from integer
without a cast [-Wint-conversion]
memcpy (a, b, c);
^
z1.c:1:7: note: expected 'long unsigned int *' but argument is of type 'long
unsigned int'
void *memcpy (void *, void *, __SIZE_TYPE__ *);
^~~~~~
z1.c:6:3: internal compiler error: in get_range_info, at tree-ssanames.c:407
memcpy (a, b, c);
^~~~~~~~~~~~~~~~
0xc57d65 get_range_info(tree_node const*, generic_wide_int<wide_int_storage>*,
generic_wide_int<wide_int_storage>*)
../../gcc/tree-ssanames.c:407
0x85e44c size_must_be_zero_p
../../gcc/gimple-fold.c:653
0x85e44c gimple_fold_builtin_memory_op
../../gcc/gimple-fold.c:690
0x85ff9f gimple_fold_builtin
../../gcc/gimple-fold.c:3644
0x862b5b gimple_fold_call
../../gcc/gimple-fold.c:4153
0x862b5b fold_stmt_1
../../gcc/gimple-fold.c:4817
0x884fc8 gimplify_call_expr
../../gcc/gimplify.c:3424
0x87c757 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11369
0x87e776 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6618
0x87baf3 gimplify_statement_list
../../gcc/gimplify.c:1763
0x87baf3 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11826
0x87e776 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6618
0x87f25f gimplify_bind_expr
../../gcc/gimplify.c:1331
0x87bda6 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gimplify.c:11598
0x87e776 gimplify_stmt(tree_node**, gimple**)
../../gcc/gimplify.c:6618
0x87fac8 gimplify_body(tree_node*, bool)
../../gcc/gimplify.c:12592
0x87fd95 gimplify_function_tree(tree_node*)
../../gcc/gimplify.c:12736
0x73c007 cgraph_node::analyze()
../../gcc/cgraphunit.c:669
0x73eb77 analyze_functions
../../gcc/cgraphunit.c:1123
0x73f172 symbol_table::finalize_compilation_unit()
../../gcc/cgraphunit.c:2673
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Confirmed.
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Subject: [Bug c/86202] [8/9 Regression] ICE in get_range_info, at tree-ssanames.c:407
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What |Removed |Added
----------------------------------------------------------------------------
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CC| |mpolacek at gcc dot gnu.org
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r251347.
>From gcc-bugs-return-607532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 19:02:58 2018
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Subject: [Bug c/86202] [8/9 Regression] ICE in get_range_info, at tree-ssanames.c:407
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What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Target Milestone|--- |8.2
>From gcc-bugs-return-607534-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 19:04:18 2018
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
>From gcc-bugs-return-607533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 19:04:02 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/86203] New: duplicate non-constant call to strlen() not folded
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86203
Bug ID: 86203
Summary: duplicate non-constant call to strlen() not folded
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
In the test case below, GCC emits two calls to strlen() even though only one is
necessary: the second call can be replaced by the assignment 'n1 = n0' Cl
$ cat d.c && gcc -O2 -S -Wall -Wextra -fdump-tree-optimized=/dev/stdout d.c
unsigned n0, n1;
void f (const char *s)
{
n0 = __builtin_strlen (s);
n1 = __builtin_strlen (s); // should substitute: n1 = n0;
}
;; Function f (f, funcdef_no=0, decl_uid=1958, cgraph_uid=0, symbol_order=2)
f (const char * s)
{
long unsigned int _1;
unsigned int _2;
long unsigned int _3;
unsigned int _4;
<bb 2> [local count: 1073741825]:
_1 = __builtin_strlen (s_6(D));
_2 = (unsigned int) _1;
n0 = _2;
_3 = __builtin_strlen (s_6(D)); // unnecessary strlen() call
_4 = (unsigned int) _3;
n1 = _4;
return;
}
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Subject: [Bug tree-optimization/86203] duplicate non-constant call to strlen() not folded
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=79547
Blocks| |83819
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Intel ICC emits just one call to __intel_sse2_strlen. Clang emits two calls
like GCC.
See also bug 79547 for a similar missed optimization (the bug was fixed in GCC
7).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83819
[Bug 83819] [meta-bug] missing strlen optimizations
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Subject: [Bug c++/86193] [7/8/9 Regression] A recurring bug?
Date: Mon, 18 Jun 2018 19:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86193
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |SUSPENDED
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> (In reply to zhonghao from comment #0)
> > I tried the latest g++, but it does not accept the code. BTW, clang++
> > accepts the code. Is this a recurring bug?
>
> No, it's rejected for a different reason, so it's not the same bug.
>
> It started to be rejected with r243868:
>
> Check that a partial specialization is more specialized.
Indeed.
[temp.class.spec]: The specialization shall be more specialized than the
primary template (17.6.5.2).
Checking that is equivalent to resolving the partial ordering of function
templates in
template <class T>
struct identity
{
typedef T type;
};
template <class T, typename T::type A>
struct foo {};
template <class T1, typename T1::type A1>
void fn(foo<T1,A1>) = delete;
template <class T2, T2 A2>
void fn(foo<identity<T2>,A2>);
int main()
{
fn(foo<identity<int>,0>()); // error here
}
which, similarly, G++ (and EDG) rejects, and clang accepts.
I think G++ is right here: when we try to deduce values for T1 and A1 in
partial ordering, we deduce T1 to identity<T2>, but we can't deduce anything
for A1 because we don't know that the types are compatible. You can work
around that by changing your partial specialization to
template <class T, typename identity<T>::type A>
struct foo<identity<T>, A> {};
This does seem like an underspecified area in the standard.
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/85358] PowerPC: Using -mabi=ieeelongdouble -mcpu=power9 breaks __ibm128
Date: Mon, 18 Jun 2018 19:10:00 -0000
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--- Comment #1 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Mon Jun 18 19:10:08 2018
New Revision: 261712
URL: https://gcc.gnu.org/viewcvs?rev=261712&root=gcc&view=rev
Log:
[gcc]
2018-06-18 Michael Meissner <meissner@linux.ibm.com>
PR target/85358
* config/rs6000/rs6000-modes.def (toplevel): Rework the 128-bit
floating point modes, so that IFmode is numerically greater than
TFmode, which is greater than KFmode using FRACTIONAL_FLOAT_MODE
to declare the ordering. This prevents IFmode from being
converted to TFmode when long double is IEEE 128-bit on an ISA 3.0
machine. Include rs6000-modes.h to share the fractional values
between genmodes* and the rest of the compiler.
(IFmode): Likewise.
(KFmode): Likewise.
(TFmode): Likewise.
* config/rs6000/rs6000-modes.h: New file.
* config/rs6000/rs6000.c (rs6000_debug_reg_global): Change the
meaning of rs6000_long_double_size so that 126..128 selects an
appropriate 128-bit floating point type.
(rs6000_option_override_internal): Likewise.
* config/rs6000/rs6000.h (toplevel): Include rs6000-modes.h.
(TARGET_LONG_DOUBLE_128): Change the meaning of
rs6000_long_double_size so that 126..128 selects an appropriate
128-bit floating point type.
(LONG_DOUBLE_TYPE_SIZE): Update comment.
* config/rs6000/rs6000.md (trunciftf2): Correct the modes of the
source and destination to match the standard usage.
(truncifkf2): Likewise.
(copysign<mode>3, IEEE iterator): Rework copysign of float128 on
ISA 2.07 to use an explicit clobber, instead of passing in a
temporary.
(copysign<mode>3_soft): Likewise.
[libgcc]
2018-06-18 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/t-float128 (FP128_CFLAGS_SW): Compile float128
support modules with -mno-gnu-attribute.
* config/rs6000/t-float128-hw (FP128_CFLAGS_HW): Likewise.
Added:
trunk/gcc/config/rs6000/rs6000-modes.h
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000-modes.def
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/config/rs6000/rs6000.h
trunk/gcc/config/rs6000/rs6000.md
trunk/libgcc/ChangeLog
trunk/libgcc/config/rs6000/t-float128
trunk/libgcc/config/rs6000/t-float128-hw
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86204] New: [9 Regression] wrong strlen result after prior strnlen
Date: Mon, 18 Jun 2018 19:11:00 -0000
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Bug ID: 86204
Summary: [9 Regression] wrong strlen result after prior strnlen
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
A bug in the strnlen() implementation committed in r261705 lets a strnlen()
result be substituted for the result of subsequent calls to strlen() with the
same argument:
$ cat c.c && gcc -O2 -Wall -Wextra -fdump-tree-optimized=/dev/stdout c.c &&
./a.out
char a[4] = "123";
int main (void)
{
unsigned n0 = __builtin_strnlen (a, 1);
unsigned n1 = __builtin_strlen (a);
if (n0 != 1 || n1 != 3)
__builtin_abort ();
}
;; Function main (main, funcdef_no=0, decl_uid=1899, cgraph_uid=1,
symbol_order=1) (executed once)
main ()
{
<bb 2> [count: 0]:
__builtin_abort ();
}
Aborted (core dumped)
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Subject: [Bug tree-optimization/86204] [9 Regression] wrong strlen result after prior strnlen
Date: Mon, 18 Jun 2018 19:12:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-18
Blocks| |83819
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83819
[Bug 83819] [meta-bug] missing strlen optimizations
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Subject: [Bug tree-optimization/86204] [9 Regression] wrong strlen result after prior strnlen
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2018-06/msg01087.html
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86191] Partial ordering with an expression involving non-type template parameters
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |SUSPENDED
Summary|[6/7/8/9 Regression] A |Partial ordering with an
|missing error message? |expression involving
| |non-type template
| |parameters
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to zhonghao from comment #0)
> The code is as follow:
>
> template<int i> struct g {};
>
> template<int i, int j> void f(g<i/j>) { }
> template<int i, int j> void f(g<j>) { }
>
> int main()
> {
> f<4,2>(g<4/2>());
> }
>
> When clang++ compiles the code, it produces the following messages:
> 1gcc01.cpp:8:3: error: call to 'f' is ambiguous
> 1gcc01.cpp:3:29: note: candidate function [with i = 4, j = 2]
> 1gcc01.cpp:4:29: note: candidate function [with i = 4, j = 2]
> template<int i, int j> void f(g<j>) { }
>
> However, when g++ compiles the code, it does not produce any error messages.
> Is the code legal or not? For me, it seems that the messages of clang++ are
> reasonable.
In partial ordering, it seems that we can deduce j#2 to i#1/j#1, but we can't
do any deduction in the other direction, so f#1 is more specialized. We don't
need to deduce a value for i#2 because it's not used in the function
parameters. I don't see why this would be ambiguous.
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Subject: [Bug c++/86200] [8/9 Regression] ICE in dependent_type_p, at cp/pt.c:24634
Date: Mon, 18 Jun 2018 19:38:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug c/86196] [9 Regression] Bogus -Wrestrict on memcpy between array elements at unequal indices
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86196
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |8.1.0
Keywords| |diagnostic
Last reconfirmed| |2018-06-18
CC| |msebor at gcc dot gnu.org
Blocks| |84774
Ever confirmed|0 |1
Summary|Bogus -Wrestrict on memcpy |[9 Regression] Bogus
| |-Wrestrict on memcpy
| |between array elements at
| |unequal indices
Known to fail| |9.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with the simplified test case below. The "offset [0, 8]" notation
indicates the range the offset into an array is determined to be in. The bug
is caused by GCC incorrectly computing the offset to be between 0 and 8 bytes
(the 8 is the size of the struct).
$ cat pr86196.c && gcc -O2 -S -Wall pr86196.c
struct S { int i; void *p; };
void g (struct S *a, int i, int j)
{
if (i != j)
__builtin_memcpy (&a[j], &a[i], sizeof (struct S));
}
pr86196.c: In function ‘g’:
pr86196.c:6:5: warning: ‘__builtin_memcpy’ accessing 16 bytes at offsets [0, 8]
and [0, 8] overlaps between 8 and 16 bytes at offset [0, 8] [-Wrestrict]
__builtin_memcpy (&a[j], &a[i], sizeof (struct S));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The regression was introduced in r260280:
r260280 | msebor | 2018-05-15 22:30:38 -0400 (Tue, 15 May 2018) | 15 lines
PR tree-optimization/85753 - missing -Wrestrict on memcpy into a member array
gcc/ChangeLog:
PR tree-optimization/85753
* gimple-ssa-warn-restrict.c (builtin_memref::builtin_memref): Handle
RECORD_TYPE in addition to ARRAY_TYPE.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84774
[Bug 84774] [meta-bug] bogus/missing -Wrestrict
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Subject: [Bug c/86196] [9 Regression] Bogus -Wrestrict on memcpy between array elements at unequal indices
Date: Mon, 18 Jun 2018 21:40:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
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Subject: [Bug middle-end/86202] [8/9 Regression] ICE in get_range_info, at tree-ssanames.c:407
Date: Mon, 18 Jun 2018 21:49:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=86114,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=86125
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Another similar bug is pr86114.
The invalid memcpy declaration will be diagnosed (and possibly even discarded
in favor of the correct one) once pr86125 has been fixed.
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Subject: [Bug tree-optimization/86199] warn on calls to strlen with same argument as in strnlen
Date: Mon, 18 Jun 2018 21:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86199
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Ditto for strdup vs strndup, although there it might be worth considering
diagnosing only calls where the strndup bound is equal the size of the source
array, as in:
char a[4], *p, *q;
void f (void)
{
p = __builtin_strdup (a); // possibly unsafe? if not then...
// ...
q = __builtin_strndup (a, sizeof a); // this could be replaced by strdup()
}
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Subject: [Bug middle-end/85602] -Wsizeof-pointer-memaccess for strncat with size of source
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85602
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Mon Jun 18 22:17:57 2018
New Revision: 261718
URL: https://gcc.gnu.org/viewcvs?rev=261718&root=gcc&view=rev
Log:
PR middle-end/85602 - -Wsizeof-pointer-memaccess for strncat with size of
source
gcc/c-family/ChangeLog:
PR middle-end/85602
* c-warn.c (sizeof_pointer_memaccess_warning): Check for attribute
nonstring.
gcc/ChangeLog:
PR middle-end/85602
* calls.c (maybe_warn_nonstring_arg): Handle strncat.
* tree-ssa-strlen.c (is_strlen_related_p): Make extern.
Handle integer subtraction.
(maybe_diag_stxncpy_trunc): Handle nonstring source arguments.
* tree-ssa-strlen.h (is_strlen_related_p): Declare.
gcc/testsuite/ChangeLog:
PR middle-end/85602
* gcc.dg/attr-nonstring-2.c: Adjust text of expected warning.
* c-c++-common/attr-nonstring-8.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/attr-nonstring-8.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-warn.c
trunk/gcc/calls.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/attr-nonstring-2.c
trunk/gcc/tree-ssa-strlen.c
trunk/gcc/tree-ssa-strlen.h
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Subject: [Bug middle-end/85602] -Wsizeof-pointer-memaccess for strncat with size of source
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Adjusted patch committed into trunk in r261718.
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Subject: [Bug c++/86205] New: ICE on valid C++11 code: in type_dependent_expression_p, at cp/pt.c:25193
Date: Mon, 18 Jun 2018 23:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86205
Bug ID: 86205
Summary: ICE on valid C++11 code: in
type_dependent_expression_p, at cp/pt.c:25193
Product: gcc
Version: unknown
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Severity: normal
Priority: P3
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It appears to be a recent regression.
$ g++tk -v
Using built-in specs.
COLLECT_GCC=g++tk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 9.0.0 20180618 (experimental) [trunk revision 261707] (GCC)
$
$ g++-8.1.0 -c tmp.cpp
$
$ g++tk -c tmp.cpp
tmp.cpp:8:68: internal compiler error: in type_dependent_expression_p, at
cp/pt.c:25193
template < class T > auto g () -> decltype (b ? f < int > : throw 0)
^
0x82c691 type_dependent_expression_p(tree_node*)
../../gcc-source-trunk/gcc/cp/pt.c:25192
0x831f97 instantiation_dependent_r
../../gcc-source-trunk/gcc/cp/pt.c:25322
0x1195df4 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../gcc-source-trunk/gcc/tree.c:11407
0x1195870 walk_tree_without_duplicates_1(tree_node**, tree_node*
(*)(tree_node**, int*, void*), void*, tree_node* (*)(tree_node**, int*,
tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*,
default_hash_traits<tree_node*> >*))
../../gcc-source-trunk/gcc/tree.c:11749
0x826127 instantiation_dependent_uneval_expression_p(tree_node*)
../../gcc-source-trunk/gcc/cp/pt.c:25352
0x8b0533 finish_decltype_type(tree_node*, bool, int)
../../gcc-source-trunk/gcc/cp/semantics.c:8751
0x7ff66d cp_parser_decltype
../../gcc-source-trunk/gcc/cp/parser.c:14252
0x7fd95f cp_parser_simple_type_specifier
../../gcc-source-trunk/gcc/cp/parser.c:17158
0x7ee741 cp_parser_type_specifier
../../gcc-source-trunk/gcc/cp/parser.c:16945
0x7ef6e2 cp_parser_type_specifier_seq
../../gcc-source-trunk/gcc/cp/parser.c:21219
0x7fb261 cp_parser_type_id_1
../../gcc-source-trunk/gcc/cp/parser.c:21062
0x7face7 cp_parser_trailing_type_id
../../gcc-source-trunk/gcc/cp/parser.c:21153
0x7face7 cp_parser_late_return_type_opt
../../gcc-source-trunk/gcc/cp/parser.c:20978
0x7face7 cp_parser_direct_declarator
../../gcc-source-trunk/gcc/cp/parser.c:20151
0x7face7 cp_parser_declarator
../../gcc-source-trunk/gcc/cp/parser.c:19982
0x808ff1 cp_parser_init_declarator
../../gcc-source-trunk/gcc/cp/parser.c:19499
0x80a141 cp_parser_single_declaration
../../gcc-source-trunk/gcc/cp/parser.c:27400
0x80a27c cp_parser_template_declaration_after_parameters
../../gcc-source-trunk/gcc/cp/parser.c:26999
0x80ab83 cp_parser_explicit_template_declaration
../../gcc-source-trunk/gcc/cp/parser.c:27233
0x80ab83 cp_parser_template_declaration_after_export
../../gcc-source-trunk/gcc/cp/parser.c:27251
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.
$
--------------------------------------------------
bool b;
template < class T > int f ()
{
return 0;
}
template < class T > auto g () -> decltype (b ? f < int > : throw 0)
{
return 0;
}
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82063
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Mon Jun 18 23:31:53 2018
New Revision: 261719
URL: https://gcc.gnu.org/viewcvs?rev=261719&root=gcc&view=rev
Log:
PR c/82063 - issues with arguments enabled by -Wall
gcc/ChangeLog:
PR c/82063
* calls.c (alloc_max_size): Correct a logic error/typo.
Treat excessive arguments as infinite. Warn for invalid arguments.
* doc/invoke.texi (-Walloc-size-larger-than): Update.
gcc/testsuite/ChangeLog:
PR c/82063
* gcc.dg/Walloc-size-larger-than-1.c: New test.
* gcc.dg/Walloc-size-larger-than-10.c: New test.
* gcc.dg/Walloc-size-larger-than-11.c: New test.
* gcc.dg/Walloc-size-larger-than-12.c: New test.
* gcc.dg/Walloc-size-larger-than-13.c: New test.
* gcc.dg/Walloc-size-larger-than-14.c: New test.
* gcc.dg/Walloc-size-larger-than-15.c: New test.
* gcc.dg/Walloc-size-larger-than-16.c: New test.
* gcc.dg/Walloc-size-larger-than-2.c: New test.
* gcc.dg/Walloc-size-larger-than-3.c: New test.
* gcc.dg/Walloc-size-larger-than-4.c: New test.
* gcc.dg/Walloc-size-larger-than-5.c: New test.
* gcc.dg/Walloc-size-larger-than-6.c: New test.
* gcc.dg/Walloc-size-larger-than-7.c: New test.
* gcc.dg/Walloc-size-larger-than-8.c: New test.
* gcc.dg/Walloc-size-larger-than-9.c: New test.
* gcc.dg/Walloc-size-larger-than.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-1.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-10.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-11.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-12.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-13.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-14.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-15.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-16.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-2.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-3.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-4.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-5.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-6.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-7.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-8.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-9.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/calls.c
branches/gcc-8-branch/gcc/doc/invoke.texi
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-607551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 23:34:42 2018
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84920] Better handling of unmatched/ambiguous calls
Date: Mon, 18 Jun 2018 23:34:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-18
CC| |egallager at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #0)
> As reported by user "jcoffland" on Hacker News:
> https://news.ycombinator.com/item?id=16598071
>
> > One improvement I'd like to see is a simplified error message
> > for mismatched overloaded calls. If you make an overloaded call
> > for which the is no matching conversion or if the conversation is
> > ambiguous the compiler will "helpfully" dump a list of possibly
> > matching overloaded function signatures. The list can be hundreds
> > of lines long.
> >
> > For example, when you try to pipe a class to std::cout that
> > doesn't have an std::ostream &operator<<(std::ostream &, const X &).
> > Perhaps instead of dumping the complete function signatures it
> > could show one function signature followed by a list of types
> > accepted as the second parameter. Since the signatures are
> > otherwise the same. Such improvements could also reduce
> > template error spew.
>
> I hope to have a look at this in the GCC 9 timeframe, so filing this here.
OK, changing status to ASSIGNED then
>From gcc-bugs-return-607552-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 23:37:42 2018
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84918] Better handling of "std::cout >> 42;"
Date: Mon, 18 Jun 2018 23:37:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-18
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #0)
> https://www.reddit.com/r/cpp/comments/84op5c/usability_improvements_in_gcc_8/dvs5hjj/
> points out:
>
> > What is the current error message for
>
> std::cout >> 42;
>
> > On older compilers this would generate roughly 100 lines of unreadable
> > error messages, so I detect and fix it in the static analyzer I wrote.
>
> Checking on godbolt.org:
>
> #include <iostream>
> void test ()
> {
> std::cout >> 42;
> }
>
> we currently spew dozens of lines of diagnostics.
>
> May be worth special-casing this, and offering a fix-it hint to convert ">>"
> to "<<", if sane (and vice-versa).
Confirmed...
(In reply to Jonathan Wakely from comment #1)
> This seems pretty low priority though
...as an enhancement then. (also ASSIGNED since there's an assignee)
>From gcc-bugs-return-607553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 18 23:45:04 2018
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From: "joshua.r.marshall.1991 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86188] Enhancement to std::merge, constexpr check of iterator types
Date: Mon, 18 Jun 2018 23:45:00 -0000
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--- Comment #2 from Josh Marshall <joshua.r.marshall.1991 at gmail dot com> ---
That looks similar enough. But I think the Bidirectional iterator tag in the
case of sorting is expressive enough and for std::merge, either forward
iterator tags or output iterator tags would express the desired characteristics
suitably. If someone can't create an iterator without those needed tags but
can create an iterator with the required characteristics I would be very
surprised.
>From gcc-bugs-return-607554-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 00:03:19 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/82063] issues with arguments enabled by -Wall
Date: Tue, 19 Jun 2018 00:03:00 -0000
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--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Jun 19 00:02:30 2018
New Revision: 261720
URL: https://gcc.gnu.org/viewcvs?rev=261720&root=gcc&view=rev
Log:
PR middle-end/82063 - issues with arguments enabled by -Wall
gcc/ChangeLog:
PR middle-end/82063
* calls.c (alloc_max_size): Correct a logic error/typo.
Treat excessive arguments as infinite. Warn for invalid arguments.
* doc/invoke.texi (-Walloc-size-larger-than): Update.
gcc/testsuite/ChangeLog:
PR middle-end/82063
* gcc.dg/Walloc-size-larger-than-1.c: New test.
* gcc.dg/Walloc-size-larger-than-10.c: New test.
* gcc.dg/Walloc-size-larger-than-11.c: New test.
* gcc.dg/Walloc-size-larger-than-12.c: New test.
* gcc.dg/Walloc-size-larger-than-13.c: New test.
* gcc.dg/Walloc-size-larger-than-14.c: New test.
* gcc.dg/Walloc-size-larger-than-15.c: New test.
* gcc.dg/Walloc-size-larger-than-16.c: New test.
* gcc.dg/Walloc-size-larger-than-2.c: New test.
* gcc.dg/Walloc-size-larger-than-3.c: New test.
* gcc.dg/Walloc-size-larger-than-4.c: New test.
* gcc.dg/Walloc-size-larger-than-5.c: New test.
* gcc.dg/Walloc-size-larger-than-6.c: New test.
* gcc.dg/Walloc-size-larger-than-7.c: New test.
* gcc.dg/Walloc-size-larger-than-8.c: New test.
* gcc.dg/Walloc-size-larger-than-9.c: New test.
* gcc.dg/Walloc-size-larger-than.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-10.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-11.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-12.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-13.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-14.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-15.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-16.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-2.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-3.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-4.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-5.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-6.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-7.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-8.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than-9.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/Walloc-size-larger-than.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/calls.c
branches/gcc-7-branch/gcc/doc/invoke.texi
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-607555-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 00:05:37 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++/86201] ICE: Error reporting routines re-entered
Date: Tue, 19 Jun 2018 00:05:00 -0000
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The problem here is that we report the missing return value:
9224 permerror (input_location, "return-statement with no value, in "
9225 "function returning %qT", valtype);
but permerror will end up calling print_instantiation_full_context, which ends
up calling dump_template_bindings and then tsubst -> tsubst_copy_and_build ->
build_functional_cast -> ... -> ocp_convert
which has (complain is tf_none)
829 if (complain & tf_warning)
830 return cp_truthvalue_conversion (e);
831 else
832 {
833 /* Prevent bogus -Wint-in-bool-context warnings coming
834 from c_common_truthvalue_conversion down the line. */
835 warning_sentinel w (warn_int_in_bool_context);
836 return cp_truthvalue_conversion (e);
837 }
So we call cp_truthvalue_conversion -> c_common_truthvalue_conversion ->
build_binary_op which only calls cp_build_binary_op but with
tf_warning_or_error. So even though the warning
4736 if ((complain & tf_warning)
4737 && (FLOAT_TYPE_P (type0) || FLOAT_TYPE_P (type1)))
4738 warning (OPT_Wfloat_equal,
4739 "comparing floating point with == or != is unsafe");
is properly guarded, we still re-enter the diagnostic routines.
>From gcc-bugs-return-607559-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 00:39:37 2018
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Subject: [Bug c++/86200] [8/9 Regression] ICE in dependent_type_p, at cp/pt.c:24634
Date: Tue, 19 Jun 2018 00:39:00 -0000
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Jun 19 00:38:58 2018
New Revision: 261730
URL: https://gcc.gnu.org/viewcvs?rev=261730&root=gcc&view=rev
Log:
PR c++/86200 - ICE with unexpanded pack in lambda parameter.
* pt.c (find_parameter_packs_r) [LAMBDA_EXPR]: Also look into the
function type.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-variadic7.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/pt.c
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Subject: [Bug c++/86200] [8/9 Regression] ICE in dependent_type_p, at cp/pt.c:24634
Date: Tue, 19 Jun 2018 00:39:00 -0000
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Jun 19 00:38:32 2018
New Revision: 261726
URL: https://gcc.gnu.org/viewcvs?rev=261726&root=gcc&view=rev
Log:
PR c++/86200 - ICE with unexpanded pack in lambda parameter.
* pt.c (find_parameter_packs_r) [LAMBDA_EXPR]: Also look into the
function type.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-variadic7.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
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Subject: [Bug c++/81060] [8 Regression] ICE with un-expanded parameter pack
Date: Tue, 19 Jun 2018 00:39:00 -0000
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Jun 19 00:38:52 2018
New Revision: 261729
URL: https://gcc.gnu.org/viewcvs?rev=261729&root=gcc&view=rev
Log:
PR c++/81060 - ICE with unexpanded parameter pack.
* pt.c (check_for_bare_parameter_packs): Add loc parameter.
* decl.c (grokdeclarator): Call it for qualifying_scope.
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/cp-tree.h
branches/gcc-8-branch/gcc/cp/decl.c
branches/gcc-8-branch/gcc/cp/pt.c
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/pr81060.C
branches/gcc-8-branch/gcc/testsuite/g++.dg/cpp0x/variadic-ex2.C
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Subject: [Bug c++/81060] [8 Regression] ICE with un-expanded parameter pack
Date: Tue, 19 Jun 2018 00:39:00 -0000
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Jun 19 00:38:26 2018
New Revision: 261725
URL: https://gcc.gnu.org/viewcvs?rev=261725&root=gcc&view=rev
Log:
PR c++/81060 - ICE with unexpanded parameter pack.
* pt.c (check_for_bare_parameter_packs): Add loc parameter.
* decl.c (grokdeclarator): Call it for qualifying_scope.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl.c
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/g++.dg/cpp0x/pr81060.C
trunk/gcc/testsuite/g++.dg/cpp0x/variadic-ex2.C
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Subject: [Bug c++/86200] [8/9 Regression] ICE in dependent_type_p, at cp/pt.c:24634
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/86182] [8/9 Regression] gcc crashes when compiling the code
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
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Subject: [Bug c++/86205] [9 Regression] ICE on valid C++11 code: in type_dependent_expression_p, at cp/pt.c:25193
Date: Tue, 19 Jun 2018 01:37:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-19
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |9.0
Summary|ICE on valid C++11 code: in |[9 Regression] ICE on valid
|type_dependent_expression_p |C++11 code: in
|, at cp/pt.c:25193 |type_dependent_expression_p
| |, at cp/pt.c:25193
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r260272.
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Subject: [Bug target/83831] [RX] Unused bclr,bnot,bset insns
Date: Tue, 19 Jun 2018 04:14:00 -0000
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Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #43266|0 |1
is obsolete| |
--- Comment #6 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Created attachment 44291
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44291&action=edit
Patch for GCC 6
Updated patch for GCC 6
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Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #43270|0 |1
is obsolete| |
--- Comment #7 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Created attachment 44292
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44292&action=edit
Patch for GCC 7
Updated patch for GCC 7
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Subject: [Bug target/83831] [RX] Unused bclr,bnot,bset insns
Date: Tue, 19 Jun 2018 04:16:00 -0000
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Oleg Endo <olegendo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Fixed on GCC 8. Patches for GCC 6 and GCC 7 available here.
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From: "franke at computer dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Tue, 19 Jun 2018 06:21:00 -0000
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--- Comment #3 from Christian Franke <franke at computer dot org> ---
(In reply to Jonathan Wakely from comment #1)
> Why is the one in the DLL not compatible?
I don't know.
> The extern templates are disabled because std::basic_string has additional
> member functions in C++17 mode, and they're not instantiated in the library.
> By disabling the explicit instantiation declarations the compiler will emit
> definitions for the C++17-only member functions.
This has no effect due to the bogus specialization in basic_string.h (see patch
below).
> As requested at https://gcc.gnu.org/bugs testcases need to be provided here,
> not as URLs.
Sorry. New testcase below:
$ uname -srvmo
CYGWIN_NT-10.0 2.10.0(0.325/5/3) 2018-02-02 15:16 x86_64 Cygwin
$ g++ --version
g++ (GCC) 7.3.0
$ cygcheck -f /bin/cygstdc++-6.dll
libstdc++6-7.3.0-2
$ cat getlinetest.cpp
#include <sstream>
int main()
{
std::string line;
std::istringstream stream("*");
std::getline(stream, line, '\n');
return (int)line.c_str()[0];
}
$ g++ -o getlinetest getlinetest.cpp && ./getlinetest; echo $?
42
$ g++ -std=c++17 -o getlinetest getlinetest.cpp && ./getlinetest; echo $?
Aborted (core dumped)
134
$ g++ -std=c++17 -static -o getlinetest getlinetest.cpp && ./getlinetest;\
echo $?
42
Interestingly the statically linked version works. Is there possibly some
template function called by getline() which is not C++17 compatible? In the
static case the new version of this function from getline.o is used instead of
the old one in the lib*.a file.
Possible fix (char only, should also be done for wchar_t):
$ cat basic_string.h.patch
--- basic_string.h.orig 2018-05-03 06:22:46.000000000 +0200
+++ basic_string.h 2018-06-19 07:49:50.190322000 +0200
@@ -6329,11 +6329,6 @@
{ return std::getline(__is, __str); }
#endif
- template<>
- basic_istream<char>&
- getline(basic_istream<char>& __in, basic_string<char>& __str,
- char __delim);
-
#ifdef _GLIBCXX_USE_WCHAR_T
template<>
basic_istream<wchar_t>&
$ (cd /usr/lib/gcc/x86_64-pc-cygwin/7.3.0/include/c++/bits && patch) \
< basic_string.h.patch
patching file basic_string.h
$ g++ -std=c++17 -o getlinetest getlinetest.cpp && ./getlinetest; echo $?
42
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Subject: [Bug tree-optimization/86179] [9 Regression] ice in get_later_stmt, at tree-vectorizer.h:1108
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/86179] [9 Regression] ice in get_later_stmt, at tree-vectorizer.h:1108
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jun 19 06:53:04 2018
New Revision: 261731
URL: https://gcc.gnu.org/viewcvs?rev=261731&root=gcc&view=rev
Log:
2018-06-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/86179
* tree-vect-patterns.c (vect_pattern_recog_1): Clean up
after failed recognition.
* gcc.dg/pr86179.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr86179.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-patterns.c
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Subject: [Bug c++/86195] [9 Regression] Ref-qualified nested class member function issue
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Version|8.1.1 |9.0
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Subject: [Bug tree-optimization/86196] [9 Regression] Bogus -Wrestrict on memcpy between array elements at unequal indices
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug middle-end/86202] [8/9 Regression] ICE in get_range_info, at tree-ssanames.c:407
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is that the frontend ends up with
<function_decl 0x7ffff6939200 memcpy
type <function_type 0x7ffff69bd690
...
arg-types <tree_list 0x7ffff69ba938 value <pointer_type 0x7ffff68b4000>
chain <tree_list 0x7ffff69ba910 value <pointer_type 0x7ffff68b4000>
chain <tree_list 0x7ffff69ba8e8 value <pointer_type
0x7ffff68b8e70>
chain <tree_list 0x7ffff68a8820 value <void_type
0x7ffff68acf18 void>>>>>
^^^
pointer_to_this <pointer_type 0x7ffff69bd9d8>>
addressable used nothrow public external built-in decl_3 decl_5 QI t.c:1:7
align:8 warn_if_not_align:0 built-in: BUILT_IN_NORMAL:BUILT_IN_MEMCPY
context <translation_unit_decl 0x7ffff68a1258 t.c>
^^^
so it puts BUILT_IN_NORMAL:BUILT_IN_MEMCPY on a decl with argument
types that do not match that of the MEMCPY builtin.
I think this is a more general issue with decl merging and not an issue
of rejecting incompatible declarations.
If we accept _any_ mismatch then we need to keep two decls and _not_
merge them.
Note that the original builtin decl is still there and it does have the
correct types. So eventually the only issue is that we set the
BUILT_IN_NORMAL:BUILT_IN_MEMCPY attribution to mismatched decls.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86202
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Actually I forgot we have two copies of the builtin decl. The implicit one
gets its type "adjusted" by the duplicate via merge_decls
/ composite_type (newtype, oldtype)
eventually we can simply do composite_type (oldtype, newtype) here ...
>From gcc-bugs-return-607573-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 07:14:44 2018
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Subject: [Bug tree-optimization/86203] duplicate non-constant call to strlen() not folded
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is that s may point to n0 so this optimization isn't valid.
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Subject: [Bug tree-optimization/83819] [meta-bug] missing strlen optimizations
Date: Tue, 19 Jun 2018 07:14:00 -0000
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Bug 83819 depends on bug 86203, which changed state.
Bug 86203 Summary: duplicate non-constant call to strlen() not folded
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86203
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>From gcc-bugs-return-607576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 07:17:44 2018
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Subject: [Bug tree-optimization/86204] [9 Regression] wrong strlen result after prior strnlen
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>From gcc-bugs-return-607575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 07:17:15 2018
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Subject: [Bug tree-optimization/86203] duplicate non-constant call to strlen() not folded
Date: Tue, 19 Jun 2018 07:17:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
It works if you make n0 static btw. (only in late FRE because early
TREE_ADDRESSABLE of n0 is not yet cleared)
>From gcc-bugs-return-607577-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 07:26:01 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86206] New: ICE in forall
Date: Tue, 19 Jun 2018 07:26:00 -0000
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Bug ID: 86206
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This is from c.l.f. posted by Beliavsky on April 27, 2016, it gave (at that
time) an ICE in gfortran 5.3, and still does so in the actual trunk. I think
this was never reported here on bugzilla. Here is the code:
module zero_mod
implicit none
contains
!
pure function zero_vec(xx) result(ret)
real , intent(in) :: xx(:)
real :: ret(size(xx))
integer :: i
forall (i=1:size(xx)) ret(i) = 0.0
end function zero_vec
!
pure function zero_mat(xx) result(ret)
real , intent(in) :: xx(:,:)
real :: ret(size(xx,1),size(xx,2))
integer :: i
forall (i=1:size(xx,2)) ret(:,i) = zero_vec(xx(:,i))
end function zero_mat
end module zero_mod
>From gcc-bugs-return-607578-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 07:53:55 2018
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Subject: [Bug c++/86207] New: A recurring bug?
Date: Tue, 19 Jun 2018 07:53:00 -0000
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The code is as follow:
constexpr int f(){
if(true) return 0;
throw 0;
}
int main(){
constexpr auto i = f();
}
It comes from a previous report:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67371
Benjamin Buch said that the fixed code accepts the above code. I tried the
latest gcc, but it still produces error messages:
expression ‘<throw expression>’ is not a constant expression
throw 0;
Is this a recurring bug?
>From gcc-bugs-return-607579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 07:54:42 2018
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Subject: [Bug c++/86207] A recurring bug?
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--- Comment #1 from zhonghao at pku dot org.cn ---
BTW, clang++ accepts the above code.
>From gcc-bugs-return-607580-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 08:14:51 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86208] New: improper handling of an extern declared inline function
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Bug ID: 86208
Summary: improper handling of an extern declared inline
function
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The code is as follow:
class X {
public:
int i;
};
inline const int& OHashKey(const X& x) {
return x.i;
}
int main() {
extern const int& OHashKey(const X& x);
X x;
return OHashKey(x);
}
It comes from a previous bug report
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3698).
It says that g++3.0 produces a error message when compiling the code:
undefined reference to `OHashKey(X const&)'
I tried the latest g++, and it still produces the identical error message.
Is this a recurring bug?
>From gcc-bugs-return-607581-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 09:25:26 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 c++/86208] [6/7/8/9 Regression] improper handling of an extern declared inline function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86208
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |3.4.6
Version|unknown |8.1.1
Keywords| |link-failure
Last reconfirmed| |2018-06-19
Ever confirmed|0 |1
Summary|improper handling of an |[6/7/8/9 Regression]
|extern declared inline |improper handling of an
|function |extern declared inline
| |function
Target Milestone|--- |6.5
Known to fail| |4.0.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. clang++ compiles the code OK. We do so only when optimizing (and
then probably inlining the call). Seems to be an old regression.
>From gcc-bugs-return-607582-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 09:25:32 2018
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Subject: [Bug fortran/86206] ICE in gfc_resolve_forall, at fortran/resolve.c:9989
Date: Tue, 19 Jun 2018 09:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-19
Summary|ICE in forall |ICE in gfc_resolve_forall,
| |at fortran/resolve.c:9989
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-607583-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 09:28:44 2018
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Subject: [Bug target/86209] New: Peephole does not happen because the type of zero/sign extended operands is not the same.
Date: Tue, 19 Jun 2018 09:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86209
Bug ID: 86209
Summary: Peephole does not happen because the type of zero/sign
extended operands is not the same.
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: sameerad at gcc dot gnu.org
Target Milestone: ---
While implementing peephole2 for combining shorter types loads/stores into
larger type load/store, following testcase was found for aarch64 for which
peephole does not happen because the type of zero/sign extended operands is not
the same.
Test program:
unsigned short
subus (unsigned short *array)
{
return array[0] + array[1];
}
Expander generated RTL:
(insn 6 3 7 2 (set (reg:HI 96)
(mem:HI (reg/v/f:DI 94 [ array ]) [1 *array_4(D)+0 S2 A16]))
(nil))
(insn 7 6 8 2 (set (reg:HI 97)
(mem:HI (plus:DI (reg/v/f:DI 94 [ array ])
(const_int 2 [0x2])) [1 MEM[(short unsigned int *)array_4(D) +
2B]+0 S2 A16]))
(nil))
(insn 8 7 9 2 (set (reg:SI 99)
(subreg:SI (reg:HI 97) 0))
(nil))
(insn 9 8 10 2 (set (reg:SI 98)
(plus:SI (subreg:SI (reg:HI 96) 0)
(reg:SI 99)))
(expr_list:REG_EQUAL (plus:SI (subreg:SI (reg:HI 96) 0)
(subreg:SI (reg:HI 97) 0))
(nil)))
The combiner combines insn 7 and 8 to generate zero extension to SI mode.
(insn 8 7 9 2 (set (reg:SI 99 [ MEM[(short unsigned int *)array_4(D) + 2B] ])
(zero_extend:SI (mem:HI (plus:DI (reg/v/f:DI 94 [ array ])
(const_int 2 [0x2])) [1 MEM[(short unsigned int
*)array_4(D) + 2B]+0 S2 A16]))) {*zero_extendhisi2_aarch64}
(expr_list:REG_DEAD (reg/v/f:DI 94 [ array ])
(nil)))
The reload pass removes SUBREGs, which holds information about desired type,
because of which HImode regs are zero extended to DImode.
(insn 8 7 6 2 (set (reg:SI 1 x1 [orig:99 MEM[(short unsigned int *)array_4(D) +
2B] ] [99])
(zero_extend:SI (mem:HI (plus:DI (reg/v/f:DI 0 x0 [orig:94 array ]
[94])
(const_int 2 [0x2])) [1 MEM[(short unsigned int
*)array_4(D) + 2B]+0 S2 A16]))) {*zero_extendhisi2_aarch64}
(nil))
(insn 6 8 9 2 (set (reg:DI 0 x0)
(zero_extend:DI (mem:HI (reg/v/f:DI 0 x0 [orig:94 array ] [94]) [1
*array_4(D)+0 S2 A16]))) {*zero_extendhidi2_aarch64}
(nil))
(insn 9 6 14 2 (set (reg:SI 0 x0 [98])
(plus:SI (reg:SI 0 x0 [orig:96 *array_4(D) ] [96])
(reg:SI 1 x1 [orig:99 MEM[(short unsigned int *)array_4(D) + 2B] ]
[99]))){*addsi3_aarch64}
(nil))
(insn 14 9 15 2 (set (reg/i:HI 0 x0)
(reg:HI 0 x0 [98])) {*movhi_aarch64}
(nil))
(insn 15 14 17 2 (use (reg/i:HI 0 x0))
(nil))
(note 17 15 18 NOTE_INSN_DELETED)
(note 18 17 0 NOTE_INSN_DELETED)
Now as both memory accesses have different extended types, they cannot be
combined by peephole.
Because of this, even when sched_fusion has brought the loads/stores closer,
they cannot be merged.
>From gcc-bugs-return-607584-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 09:51:34 2018
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Subject: [Bug target/86209] Peephole does not happen because the type of zero/sign extended operands is not the same.
Date: Tue, 19 Jun 2018 09:51:00 -0000
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ramana at gcc dot gnu.org
--- Comment #1 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to sameerad from comment #0)
> While implementing peephole2 for combining shorter types loads/stores into
> larger type load/store, following testcase was found for aarch64 for which
> peephole does not happen because the type of zero/sign extended operands is
> not the same.
>
> Test program:
> unsigned short
> subus (unsigned short *array)
> {
> return array[0] + array[1];
> }
>
> Expander generated RTL:
> (insn 6 3 7 2 (set (reg:HI 96)
> (mem:HI (reg/v/f:DI 94 [ array ]) [1 *array_4(D)+0 S2 A16]))
> (nil))
> (insn 7 6 8 2 (set (reg:HI 97)
> (mem:HI (plus:DI (reg/v/f:DI 94 [ array ])
> (const_int 2 [0x2])) [1 MEM[(short unsigned int *)array_4(D)
> + 2B]+0 S2 A16]))
> (nil))
> (insn 8 7 9 2 (set (reg:SI 99)
> (subreg:SI (reg:HI 97) 0))
> (nil))
> (insn 9 8 10 2 (set (reg:SI 98)
> (plus:SI (subreg:SI (reg:HI 96) 0)
> (reg:SI 99)))
> (expr_list:REG_EQUAL (plus:SI (subreg:SI (reg:HI 96) 0)
> (subreg:SI (reg:HI 97) 0))
> (nil)))
>
> The combiner combines insn 7 and 8 to generate zero extension to SI mode.
>
> (insn 8 7 9 2 (set (reg:SI 99 [ MEM[(short unsigned int *)array_4(D) + 2B] ])
> (zero_extend:SI (mem:HI (plus:DI (reg/v/f:DI 94 [ array ])
> (const_int 2 [0x2])) [1 MEM[(short unsigned int
> *)array_4(D) + 2B]+0 S2 A16]))) {*zero_extendhisi2_aarch64}
> (expr_list:REG_DEAD (reg/v/f:DI 94 [ array ])
> (nil)))
>
> The reload pass removes SUBREGs, which holds information about desired
> type, because of which HImode regs are zero extended to DImode.
>
> (insn 8 7 6 2 (set (reg:SI 1 x1 [orig:99 MEM[(short unsigned int
> *)array_4(D) + 2B] ] [99])
> (zero_extend:SI (mem:HI (plus:DI (reg/v/f:DI 0 x0 [orig:94 array ]
> [94])
> (const_int 2 [0x2])) [1 MEM[(short unsigned int
> *)array_4(D) + 2B]+0 S2 A16]))) {*zero_extendhisi2_aarch64}
> (nil))
> (insn 6 8 9 2 (set (reg:DI 0 x0)
> (zero_extend:DI (mem:HI (reg/v/f:DI 0 x0 [orig:94 array ] [94]) [1
> *array_4(D)+0 S2 A16]))) {*zero_extendhidi2_aarch64}
> (nil))
> (insn 9 6 14 2 (set (reg:SI 0 x0 [98])
> (plus:SI (reg:SI 0 x0 [orig:96 *array_4(D) ] [96])
> (reg:SI 1 x1 [orig:99 MEM[(short unsigned int *)array_4(D) + 2B]
> ] [99]))){*addsi3_aarch64}
> (nil))
> (insn 14 9 15 2 (set (reg/i:HI 0 x0)
> (reg:HI 0 x0 [98])) {*movhi_aarch64}
> (nil))
> (insn 15 14 17 2 (use (reg/i:HI 0 x0))
> (nil))
> (note 17 15 18 NOTE_INSN_DELETED)
> (note 18 17 0 NOTE_INSN_DELETED)
>
> Now as both memory accesses have different extended types, they cannot be
> combined by peephole.
>
> Because of this, even when sched_fusion has brought the loads/stores closer,
> they cannot be merged.
Hmmm,
ldr w0, [x0]
ldr w1, [x0, 2]
is not the same as
ldp w0, w1, [x0]
ldp w0, w1, [x0] is the same as merging
ldr w0, [x0]
ldr w1, [x0, 4]
Am I missing something ? That would mean it isn't possible to merge this
combination.
Thoughts ...
>From gcc-bugs-return-607586-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 10:05:46 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Tue, 19 Jun 2018 10:05:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |UNCONFIRMED
Ever confirmed|1 |0
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Christian Franke from comment #3)
> > The extern templates are disabled because std::basic_string has additional
> > member functions in C++17 mode, and they're not instantiated in the library.
> > By disabling the explicit instantiation declarations the compiler will emit
> > definitions for the C++17-only member functions.
> This has no effect due to the bogus specialization in basic_string.h (see
> patch below).
What's bogus about it?
> Sorry. New testcase below:
Thanks.
> $ g++ -std=c++17 -o getlinetest getlinetest.cpp && ./getlinetest; echo $?
> Aborted (core dumped)
> 134
Could you please debug this to find where it's crashing and why?
> $ g++ -std=c++17 -static -o getlinetest getlinetest.cpp && ./getlinetest;\
> echo $?
> 42
>
> Interestingly the statically linked version works. Is there possibly some
> template function called by getline() which is not C++17 compatible?
There should be nothing in libstdc++ which is not C++17 compatible.
> Possible fix (char only, should also be done for wchar_t):
This patch won't be accepted, it's papering over some other problem not fixing
anything.
>From gcc-bugs-return-607585-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 10:05:44 2018
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Subject: [Bug target/86209] Peephole does not happen because the type of zero/sign extended operands is not the same.
Date: Tue, 19 Jun 2018 10:05:00 -0000
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--- Comment #2 from sameerad at gcc dot gnu.org ---
Ramana, it is another peephole that I am trying to explore for falkor. It
combines loads/stores of shorter types (QI/HI/SI) into single load/store of
larger type (SI/DI).
>From gcc-bugs-return-607587-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 10:07:32 2018
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Subject: [Bug c++/86208] [6/7/8/9 Regression] improper handling of an extern declared inline function
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Possibly related to Bug 82204
>From gcc-bugs-return-607588-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 10:16:59 2018
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Subject: [Bug target/86209] Peephole does not happen because the type of zero/sign extended operands is not the same.
Date: Tue, 19 Jun 2018 10:16:00 -0000
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--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to sameerad from comment #2)
> Ramana, it is another peephole that I am trying to explore for falkor. It
> combines loads/stores of shorter types (QI/HI/SI) into single load/store of
> larger type (SI/DI).
Ah I see. Sorry , not enough coffee yet.
>From gcc-bugs-return-607589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 10:21:03 2018
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Subject: [Bug target/86209] Peephole does not happen because the type of zero/sign extended operands is not the same.
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ktkachov at gcc dot gnu.org changed:
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--- Comment #4 from ktkachov at gcc dot gnu.org ---
I see this effect too.
Note that if you want to combine two LDRHs into an LDR you will be creating an
unaligned access in a lot of cases, so it may not always be profitable.
Also, I think the GIMPLE store merging pass can also merge loads these days.
Would be good to check why it doesn't handle this case.
>From gcc-bugs-return-607590-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 10:27:44 2018
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Subject: [Bug target/86209] Peephole does not happen because the type of zero/sign extended operands is not the same.
Date: Tue, 19 Jun 2018 10:27:00 -0000
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--- Comment #5 from sameerad at gcc dot gnu.org ---
The gimple store merging pass performs load/store merging only if the LHS is
memory or constant. I am also working on the GIMPLE pass which will enhance
this to merge other stores as well. However, wanted to do the performance
measurement, that is why using the peephole2 pass.
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Subject: [Bug c++/86207] A recurring bug?
Date: Tue, 19 Jun 2018 10:35:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is the same as Bug 86192 that you already reported, which is a duplicate
of Bug 80061
In fact it's almost identical to Bug 80061 comment 1. Please search for
duplicates before filing bugs.
*** This bug has been marked as a duplicate of bug 80061 ***
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Subject: [Bug c++/80061] error on constexpr function with an unevaluated throw
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 86207 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 10:44:34 2018
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/86004] [9 regression] Several lto test cases begin failing with r260963
Date: Tue, 19 Jun 2018 10:44:00 -0000
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--- Comment #6 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
If I recall correctly, old binutils issue warning when plugin produce IL file
which is done for incremental linking. I do not think there is a way to prevent
this message from gcc side other than requiring binutils 2.27+
One way to silence the warning would be simply to add -flinker-output=nolto-rel
to all the testcases (so we do not do incremental IL linking) but it will make
it still harder to add testcases for incremental link IL linking if we want to
support them on older binutils somehow (i.e. by disabling the tests or
tolerating false warning)
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Subject: [Bug c++/86210] New: [6/7/8/9 Regression] Missing -Wnonnull warning for function defined in the same TU
Date: Tue, 19 Jun 2018 10:51:00 -0000
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Bug ID: 86210
Summary: [6/7/8/9 Regression] Missing -Wnonnull warning for
function defined in the same TU
Product: gcc
Version: 8.1.1
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void * declared_not_defined(void * p) __attribute__((nonnull));
inline void * declared_and_defined(void * p) __attribute__((nonnull));
int main()
{
int * const p = 0;
declared_not_defined(p);
declared_and_defined(p);
}
void * declared_and_defined(void * p) { return p; }
G++ 5 and 6 fail to give any warnings at all, at any optimisation level.
G++ 7 and 8 and trunk only warn at -O1 and higher, and only for one of the two
calls:
x.cc: In function ‘int main()’:
x.cc:8:25: warning: argument 1 null where non-null expected [-Wnonnull]
declared_not_defined(p);
~~~~~~~~~~~~~~~~~~~~^~~
x.cc:1:8: note: in a call to function ‘void* declared_not_defined(void*)’
declared here
void * declared_not_defined(void * p) __attribute__((nonnull));
^~~~~~~~~~~~~~~~~~~~
G++ 4.7, 4.8 and 4.9 warns about both calls, without any optimisation:
x.cc: In function ‘int main()’:
x.cc:8:27: warning: null argument where non-null required (argument 1)
[-Wnonnull]
declared_not_defined(p);
^
x.cc:9:27: warning: null argument where non-null required (argument 1)
[-Wnonnull]
declared_and_defined(p);
^
Compiling it as C gives almost the opposite results! I get no warnings for any
release before 7.1, and a warning for only one function with 7.1 but only with
optimisation, and warnings for both function for 8.1 with optimisation. So for
C thigns have been getting gradually better, but worse for C++.
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86197] POWERPC: float128 parameter passing
Date: Tue, 19 Jun 2018 10:53:00 -0000
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Tue Jun 19 10:52:39 2018
New Revision: 261738
URL: https://gcc.gnu.org/viewcvs?rev=261738&root=gcc&view=rev
Log:
rs6000: Fix vector homogeneous aggregates (PR86197)
The existing code allows only 4 vectors worth of ieee128 homogeneous
aggregates, but it should be 8. This happens because at one spot it
is mistakenly qualified as being passed in floating point registers.
PR target/86197
* config/rs6000/rs6000.md (rs6000_discover_homogeneous_aggregate): An
ieee128 argument takes up only one (vector) register, not two (floating
point) registers.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/86211] New: GCC 8 ada cannot build GCC 7 ada
Date: Tue, 19 Jun 2018 11:28:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: ada
X-Bugzilla-Version: 8.1.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86211
Bug ID: 86211
Summary: GCC 8 ada cannot build GCC 7 ada
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
Not sure whether this can be worked around for GCC 7 or GCC 8 but it's
unfortunate
that the GCC 8 ada compiler cannot be used to bootstrap GCC 7 with ada enabled.
Yes, I know this isn't really supported but it's unfortunate because it makes
me unable to bootstrap/test patches with ada on the GCC 6 and 7 branches on
the systems that have the system compiler updated to GCC 8.
The specific error I am getting is
[ 154s] gcc -c -g -O2 -gnatp -gnatws -nostdinc -I- -I. -Iada/generated -Iada
-I../../gcc/ada -I../../gcc/ada/gcc-interface \
[ 154s] ada/b_gnat1.adb -o ada/b_gnat1.o
[ 154s] b_gnat1.adb:174:79: "SS_Stack" not declared in "Secondary_Stack"
[ 154s] b_gnat1.adb:174:89: incorrect constraint for this kind of type
[ 154s] b_gnat1.adb:268:56: "Runtime_Default_Sec_Stack_Size" not declared in
"Parameters"
[ 154s] make[3]: *** [../../gcc/ada/gcc-interface/Make-lang.in:949:
ada/b_gnat1.o] Error 1
maybe there's a workaround available?
Using system GCC 7 was fine for bootstrapping and testing patches on the GCC 6
branch.
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Subject: [Bug c++/86212] New: ICE in tsubst_copy, at cp/pt.c:15935
Date: Tue, 19 Jun 2018 12:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86212
Bug ID: 86212
Summary: ICE in tsubst_copy, at cp/pt.c:15935
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 44293
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44293&action=edit
rename to .gz and gunzip
% uname -a
FreeBSD <SNIP> 11.1-RELEASE-p4 FreeBSD 11.1-RELEASE-p4 #0: Tue Nov 14 06:12:40
UTC 2017 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
amd64
% g++9 --version
g++9 (FreeBSD Ports Collection) 9.0.0 20180603 (experimental)
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
The ICE does not occur on GCC7 and GCC8. I have attached intermediate files.
This is the build error log:
/home/mi/h4nn3s/devel/seqan3/submodules/range-v3/include/range/v3/view_adaptor.hpp:
In instantiation of 'constexpr
ranges::v3::adaptor_cursor<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >,
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >::adaptor<true>
>::adaptor_cursor(Args&& ...) [with Args =
{__gnu_cxx::__normal_iterator<seqan3::dna4*, std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> > >,
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >::adaptor<true>};
typename
meta::v1::detail::_if_<meta::v1::list<std::is_same<std::integer_sequence<bool,
std::is_constructible<Ts, Args>::type::value ...>, std::integer_sequence<bool,
(std::is_constructible<Ts, Args>::type::value) || true ...> >, int>,
std::integral_constant<bool, true> >::type <anonymous> = 0][inherited from
ranges::v3::compressed_tuple_detail::compressed_tuple_<meta::v1::list<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4, std::allocator<seqan3::dna4> > >,
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >::adaptor<true> >,
std::integer_sequence<long unsigned int, 0, 1> >]':
/home/mi/h4nn3s/devel/seqan3/submodules/range-v3/include/range/v3/view_adaptor.hpp:405:50:
required from 'static constexpr ranges::v3::adaptor_cursor_t<D>
ranges::v3::view_adaptor<Derived, BaseRng, C>::begin_cursor_(D&) [with D =
const
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >; Derived =
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >; BaseRng =
ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >; ranges::v3::cardinality Cardinality =
(ranges::v3::cardinality)-1; ranges::v3::adaptor_cursor_t<D> =
ranges::v3::adaptor_cursor<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >,
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >::adaptor<true> >;
typename std::decay<decltype
(ranges::v3::range_access::begin_adaptor(declval<D&>(), 42))>::type =
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >::adaptor<true>;
typename std::decay<decltype (declval<typename std::decay<decltype
(ranges::v3::range_access::begin_adaptor(declval<D&>(),
42))>::type>().begin(declval<D&>()))>::type =
__gnu_cxx::__normal_iterator<seqan3::dna4*, std::vector<seqan3::dna4> >]'
/home/mi/h4nn3s/devel/seqan3/submodules/range-v3/include/range/v3/view_adaptor.hpp:423:193:
required by substitution of 'template<class D, int _concept_requires_421,
typename std::enable_if<((_concept_requires_421 == 43) || (typename
ranges::v3::concepts::Same::same<C,
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4, std::allocator<seqan3::dna4> > >,
__gnu_cxx::__normal_iterator<seqan3::dna4*, std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> > > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > > >::type() &&
ranges::v3::concepts::models<ranges::v3::concepts::Range, const
ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4, std::allocator<seqan3::dna4> > >,
__gnu_cxx::__normal_iterator<seqan3::dna4*, std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> > > > >())), int>::type <anonymous> > constexpr
decltype
(ranges::v3::view_adaptor<ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >,
ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
(ranges::v3::cardinality)-1>::begin_cursor_<D>(declval<const D&>()))
ranges::v3::view_adaptor<ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >,
ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >, (ranges::v3::cardinality)-1>::begin_cursor<D,
_concept_requires_421, <enumerator> >() const [with D =
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >; int
_concept_requires_421 = 42; typename std::enable_if<((_concept_requires_421 ==
43) || (typename ranges::v3::concepts::Same::same<C,
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4, std::allocator<seqan3::dna4> > >,
__gnu_cxx::__normal_iterator<seqan3::dna4*, std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> > > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > > >::type() &&
ranges::v3::concepts::models<ranges::v3::concepts::Range, const
ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4, std::allocator<seqan3::dna4> > >,
__gnu_cxx::__normal_iterator<seqan3::dna4*, std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> > > > >())), int>::type <anonymous> = 0]'
/home/mi/h4nn3s/devel/seqan3/submodules/range-v3/include/range/v3/range_access.hpp:175:35:
required by substitution of 'template<class Rng> static constexpr decltype
(static_cast<const Rng&>(rng).begin_cursor())
ranges::v3::range_access::begin_cursor(Rng&, int) [with Rng = const
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >]'
/home/mi/h4nn3s/devel/seqan3/submodules/range-v3/include/range/v3/view_facade.hpp:35:68:
required by substitution of 'template<class Derived> using facade_iterator_t
= ranges::v3::_basic_iterator_::basic_iterator<typename std::decay<decltype
(ranges::v3::range_access::begin_cursor(declval<Derived&>(), 42))>::type> [with
Derived = const
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >]'
/home/mi/h4nn3s/devel/seqan3/submodules/range-v3/include/range/v3/view_facade.hpp:91:48:
required by substitution of 'template<class D, int _concept_requires_90,
typename std::enable_if<((_concept_requires_113 == 43) || typename
ranges::v3::concepts::Same::same<C,
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4, std::allocator<seqan3::dna4> > >,
__gnu_cxx::__normal_iterator<seqan3::dna4*, std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> > > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > > >::type()),
int>::type <anonymous> > ranges::v3::detail::facade_iterator_t<const D>
ranges::v3::view_facade<ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >,
(ranges::v3::cardinality)-1>::begin<D, _concept_requires_90, <enumerator> >()
const [with D =
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> >, __gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4> > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > >; int
_concept_requires_90 = 42; typename std::enable_if<((_concept_requires_113 ==
43) || typename ranges::v3::concepts::Same::same<C,
ranges::v3::iter_transform_view<ranges::v3::iterator_range<__gnu_cxx::__normal_iterator<seqan3::dna4*,
std::vector<seqan3::dna4, std::allocator<seqan3::dna4> > >,
__gnu_cxx::__normal_iterator<seqan3::dna4*, std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> > > >,
ranges::v3::indirected<seqan3::view::<lambda(auto:7)> > > >::type()),
int>::type <anonymous> = 0]'
/home/mi/h4nn3s/devel/seqan3/test/unit/io/detail/output_iterator_conversion_adaptor_test.cpp:69:50:
required from 'auto oiter_conversion_adaptor<T>::get_output() [with T =
std::tuple<ranges::v3::back_insert_iterator<std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> > >, std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> >, seqan3::dna4>]'
/home/mi/h4nn3s/devel/seqan3/test/unit/io/detail/output_iterator_conversion_adaptor_test.cpp:104:160:
required from 'void
oiter_conversion_adaptor_assign_Test<gtest_TypeParam_>::TestBody() [with
gtest_TypeParam_ =
std::tuple<ranges::v3::back_insert_iterator<std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> > >, std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> >, seqan3::dna4>]'
/home/mi/h4nn3s/devel/seqan3/test/unit/io/detail/output_iterator_conversion_adaptor_test.cpp:97:1:
required from here
/home/mi/h4nn3s/devel/seqan3/submodules/range-v3/include/range/v3/view_adaptor.hpp:365:27:
internal compiler error: in tsubst_copy, at cp/pt.c:15935
using base_t::base_t;
^~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
gmake[2]: ***
[io/detail/CMakeFiles/output_iterator_conversion_adaptor_test.dir/build.make:63:
io/detail/CMakeFiles/output_iterator_conversion_adaptor_test.dir/output_iterator_conversion_adaptor_test.cpp.o]
Fehler 1
gmake[1]: *** [CMakeFiles/Makefile2:1289:
io/detail/CMakeFiles/output_iterator_conversion_adaptor_test.dir/all] Fehler 2
gmake: *** [Makefile:95: all] Fehler 2
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Subject: [Bug c++/86212] ICE in tsubst_copy, at cp/pt.c:15935
Date: Tue, 19 Jun 2018 12:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86212
--- Comment #1 from Hannes Hauswedell <h2+bugs at fsfe dot org> ---
Created attachment 44294
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44294&action=edit
second intermediate file
>From gcc-bugs-return-607599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 12:21:59 2018
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Subject: [Bug ada/86211] GCC 8 ada cannot build GCC 7 ada
Date: Tue, 19 Jun 2018 12:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86211
Arnaud Charlet <charlet at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |charlet at gcc dot gnu.org
--- Comment #1 from Arnaud Charlet <charlet at gcc dot gnu.org> ---
As you said, this combination isn't guaranteed to work, although I'm surprising
by the gcc command line you showed, which doesn't include -Iada/libgnat or
-I../../gcc/ada/libgnat as per ADA_INCLUDES in gcc-interface/Make-lang.in:
ADA_INCLUDES = -nostdinc -I- -I. -Iada/generated -Iada -I$(srcdir)/ada
-I$(srcdir)/ada/gcc-interface -Iada/libgnat -I$(srcdir)/ada/libgnat
So I'd suggest double checking your source tree here, maybe you have some local
changes that are modifying ADA_INCLUDES?
>From gcc-bugs-return-607600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 12:28:03 2018
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/86211] GCC 8 ada cannot build GCC 7 ada
Date: Tue, 19 Jun 2018 12:28:00 -0000
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--- Comment #2 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 19 Jun 2018, charlet at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86211
>
> Arnaud Charlet <charlet at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |charlet at gcc dot gnu.org
>
> --- Comment #1 from Arnaud Charlet <charlet at gcc dot gnu.org> ---
> As you said, this combination isn't guaranteed to work, although I'm surprising
> by the gcc command line you showed, which doesn't include -Iada/libgnat or
> -I../../gcc/ada/libgnat as per ADA_INCLUDES in gcc-interface/Make-lang.in:
>
> ADA_INCLUDES = -nostdinc -I- -I. -Iada/generated -Iada -I$(srcdir)/ada
> -I$(srcdir)/ada/gcc-interface -Iada/libgnat -I$(srcdir)/ada/libgnat
>
> So I'd suggest double checking your source tree here, maybe you have some local
> changes that are modifying ADA_INCLUDES?
I'm building the GCC 7 branch which has the following in
gcc-interface/Make-lang.in:
ADA_INCLUDES = -nostdinc -I- -I. -Iada/generated -Iada -I$(srcdir)/ada
-I$(srcdir)/ada/gcc-interface
The GCC 7 branch doesn't seem to have a libgnat subdirectory under ada/
>From gcc-bugs-return-607602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 12:32:41 2018
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From: "charlet at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/86211] GCC 8 ada cannot build GCC 7 ada
Date: Tue, 19 Jun 2018 12:32:00 -0000
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Arnaud Charlet <charlet at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #3 from Arnaud Charlet <charlet at gcc dot gnu.org> ---
Ah yes, so basically you're doomed: this is a pretty fundamental change which
has zero chance to work with GCC 7, sorry.
>From gcc-bugs-return-607601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 12:32:33 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 c++/86210] [6/7/8/9 Regression] Missing -Wnonnull warning for function defined in the same TU
Date: Tue, 19 Jun 2018 12:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.5
>From gcc-bugs-return-607603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 12:37:08 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86209] Peephole does not happen because the type of zero/sign extended operands is not the same.
Date: Tue, 19 Jun 2018 12:37:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Since you are trying to combine loads you may run afoul of STLF issues on
modern CPU architectures which generally cannot forward from separate stores to
a
larger load. Not sure if that applies to ARM but I would be surprised if
at least high-performance cores do not have store-to-load forwarding
capabilities.
Merging stores is generally fine (well, x86 knowledge only...) since
forwarding from larger stores to smaller loads can work.
>From gcc-bugs-return-607604-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 12:54:05 2018
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Subject: [Bug other/86198] Libbacktrace does not properly work with ".note.gnu.build-id" section
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Ian Lance Taylor <ian at airs dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ian at airs dot com
--- Comment #1 from Ian Lance Taylor <ian at airs dot com> ---
I think you're right but it's interesting to note that I was just copying this
code more or less from gdb, and in bfd/opncls.c the code says
/* FIXME: Should we support smaller build-id notes ? */
if (size < 0x24)
{
bfd_set_error (bfd_error_invalid_operation);
return NULL;
}
I wonder if that should also be <=.
>From gcc-bugs-return-607605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 13:17:21 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/82644] Non-standard hypergeometric special functions defined in strict modes
Date: Tue, 19 Jun 2018 13:17:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Jun 19 13:16:44 2018
New Revision: 261743
URL: https://gcc.gnu.org/viewcvs?rev=261743&root=gcc&view=rev
Log:
PR libstdc++/82644 define TR1 hypergeometric functions in strict modes
Following a recent change for PR 82644 the non-standard hypergeomtric
functions are not defined by <cmath> when __STRICT_ANSI__ is defined
(e.g. for -std=c++17, or -std=c++14 -D__STDCPP_WANT_MATH_SPEC_FUNCS__).
That caused errors in <tr1/cmath> because the using-declarations for
tr1::hyperg et al are invalid in strict modes.
The solution is to define the TR1 hypergeometric functions inline in
<tr1/cmath> if __STRICT_ANSI__ is defined.
Backport from mainline
2018-05-03 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/82644
* include/tr1/cmath [__STRICT_ANSI__] (hypergf, hypergl, hyperg): Use
inline definitions instead of using-declarations.
[__STRICT_ANSI__] (conf_hypergf, conf_hypergl, conf_hyperg): Likewise.
* testsuite/tr1/5_numerical_facilities/special_functions/
07_conf_hyperg/compile_cxx17.cc: New.
* testsuite/tr1/5_numerical_facilities/special_functions/
17_hyperg/compile_cxx17.cc: New.
Added:
branches/gcc-8-branch/libstdc++-v3/testsuite/tr1/5_numerical_facilities/special_functions/07_conf_hyperg/compile_cxx17.cc
branches/gcc-8-branch/libstdc++-v3/testsuite/tr1/5_numerical_facilities/special_functions/17_hyperg/compile_cxx17.cc
Modified:
branches/gcc-8-branch/libstdc++-v3/ChangeLog
branches/gcc-8-branch/libstdc++-v3/include/tr1/cmath
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Subject: [Bug libstdc++/82644] Non-standard hypergeometric special functions defined in strict modes
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.2
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 8.2
I'm not going to backport this to gcc-7-branch now, as it only affects C++17
mode and I think it's reasonable to tell people to use gcc-8 or trunk if they
need these fixes.
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Subject: [Bug c++/86212] ICE in tsubst_copy, at cp/pt.c:15935
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-19
CC| |mpolacek at gcc dot gnu.org
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed. Has to be compiled with -fconcepts.
>From gcc-bugs-return-607608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 13:29:08 2018
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Subject: [Bug c++/86212] [9 Regression] ICE in tsubst_copy, at cp/pt.c:15935
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Target Milestone|--- |9.0
Summary|ICE in tsubst_copy, at |[9 Regression] ICE in
|cp/pt.c:15935 |tsubst_copy, at
| |cp/pt.c:15935
>From gcc-bugs-return-607609-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 13:36:10 2018
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Subject: [Bug c++/86212] [9 Regression] ICE in tsubst_copy, at cp/pt.c:15935
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r258755.
>From gcc-bugs-return-607610-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 13:46:37 2018
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From: "d.khalikov at partner dot samsung.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/86198] Libbacktrace does not properly work with ".note.gnu.build-id" section
Date: Tue, 19 Jun 2018 13:46:00 -0000
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--- Comment #2 from Denis Khalikov <d.khalikov at partner dot samsung.com> ---
Looks like that feature was implemented by this patch:
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blobdiff;f=bfd/opncls.c;h=b4d4dcf64643145e71e70dba29cd8208c945ddec;hp=10684d2682da7623f4b2f3426eaa2d2ba0cd85b0;hb=2425a30e406a0523020b7e70abb864a06a45bb97;hpb=620214f742f7816e2844e1bb7f78a7a684431927
As I understood that code right, it takes "error" branch if size of the section
less than 0x24.
if (size < 0x24)
{
bfd_set_error (bfd_error_invalid_operation);
return NULL;
}
The libbacktrace instead verifies the section to be less than 0x24, should we
change it
from:
2871 && shdr->sh_size < 12 + ((note->namesz + 3) & ~ 3) +
note->descsz)
to:
2871 && shdr->sh_size == 12 + ((note->namesz + 3) & ~ 3) +
note->descsz)
?
>From gcc-bugs-return-607611-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 13:57:59 2018
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Subject: [Bug c++/86195] [9 Regression] Ref-qualified nested class member function issue
Date: Tue, 19 Jun 2018 13:57:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This was fixed on gcc-8-branch by r261197
PR c++/85731 - wrong error with qualified-id in template.
* semantics.c (finish_qualified_id_expr): build_qualified_name
for unbound names in the current class.
And it's also fixed on current trunk, presumably by r261196
I'm going to close this as a dup of Bug 85731 since it started to fail with the
same revision, and was fixed by the same revision.
*** This bug has been marked as a duplicate of bug 85731 ***
>From gcc-bugs-return-607612-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 13:58:01 2018
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Subject: [Bug c++/85731] [8/9 Regression] Inner class method declaration changes meaning of outer template class template method
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |paolo.monteverde at gmail dot com
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 86195 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607613-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 13:59:03 2018
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Subject: [Bug libstdc++/70940] pmr::resource_adaptor requires optional allocator requirements and incorrectly aligns returned pointers.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-607614-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 14:44:59 2018
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From: "ian at airs dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/86198] Libbacktrace does not properly work with ".note.gnu.build-id" section
Date: Tue, 19 Jun 2018 14:44:00 -0000
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--- Comment #3 from Ian Lance Taylor <ian at airs dot com> ---
I don't a reason to change the test to ==. I don't see what would be helped by
that. Note that Richi already approved the change to <=.
>From gcc-bugs-return-607615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 15:41:49 2018
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Subject: [Bug middle-end/85602] -Wsizeof-pointer-memaccess for strncat with size of source
Date: Tue, 19 Jun 2018 15:41:00 -0000
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seurer at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |seurer at gcc dot gnu.org
--- Comment #8 from seurer at gcc dot gnu.org ---
The new test cases fails in some cases:
make -k check-gcc RUNTESTFLAGS=dg.exp=c-c++-common/attr-nonstring-8.c
# of expected passes 17
# of expected passes 45
# of unexpected failures 6
FAIL: c-c++-common/attr-nonstring-8.c -std=gnu++98 (test for warnings, line
63)
FAIL: c-c++-common/attr-nonstring-8.c -std=gnu++98 (test for excess errors)
FAIL: c-c++-common/attr-nonstring-8.c -std=gnu++11 (test for warnings, line
63)
FAIL: c-c++-common/attr-nonstring-8.c -std=gnu++11 (test for excess errors)
FAIL: c-c++-common/attr-nonstring-8.c -std=gnu++14 (test for warnings, line
63)
FAIL: c-c++-common/attr-nonstring-8.c -std=gnu++14 (test for excess errors)
FAIL: c-c++-common/attr-nonstring-8.c -std=gnu++98 (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-test2/gcc/testsuite/c-c++-common/attr-nonstring-8.c:63:3:
warning: argument to 'sizeof' in 'char* strncat(char*, const char*, long
unsigned int)' call is the same expression as the source; did you mean to
provide an explicit length? [-Wsizeof-pointer-memaccess]
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From: "thanm at google dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/86213] New: -fsplit-stack runtime may clobber SSE input param reg
Date: Tue, 19 Jun 2018 16:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86213
Bug ID: 86213
Summary: -fsplit-stack runtime may clobber SSE input param reg
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
Reporter: thanm at google dot com
Target Milestone: ---
Created attachment 44295
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44295&action=edit
tar file with reproducer sources and makefile
The runtime code in libgcc that supports the -fsplit-stack flag can in some
cases clobber an SSE register that is being used for parameter passing.
The scenario is as follows:
- routine A calls routine B, passing a floating point argument (which does in
xmm0)
- the routine B (compiled with -fsplit-stack) invokes "__morestack", which in
turn may wind up calling out to other system routines (mmap for example)
- routine B then does something with its floating point argument (xmm0)
The code as written in __morestack does not save incoming SSE registers, so if
something gets calls that uses SSE, it can lose param values.
At the moment the only way to trigger this problem is to insure that the very
first call made to __morestack is from a routine with a live floating point
input argument (since the SSE clobbering takes place during a call to
"getenv", which typically only is invoked on the first pass through the code).
So this qualifies as a pretty obscure bug.
Reproducer case attached (written for linux/x86). Example of failing run:
$ make clean ; make run
rm -f *.o *.so main
gcc -c -O -fPIC -o main.o main.c
gcc -c -fsplit-stack -O -fPIC -o m1.o m1.c
gcc -c -O -fPIC -o m2.o m2.c
gcc -O -fuse-ld=gold -fPIC -shared m1.o m2.o -o m1.so
gcc -O -fuse-ld=gold main.o -o main m1.so
LD_LIBRARY_PATH=`pwd` ./main
in main
noframe(64.000000) = 0.000000
Last value should be 64.0, not 0.0. Example of passing run (here with -m32):
$ make clean ; make run EXTRA=-m32
rm -f *.o *.so main
gcc -c -O -m32 -fPIC -o main.o main.c
gcc -c -fsplit-stack -O -m32 -fPIC -o m1.o m1.c
gcc -c -O -m32 -fPIC -o m2.o m2.c
gcc -O -m32 -fuse-ld=gold -fPIC -shared m1.o m2.o -o m1.so
gcc -O -m32 -fuse-ld=gold main.o -o main m1.so
LD_LIBRARY_PATH=`pwd` ./main
in main
noframe(64.000000) = 64.000000
>From gcc-bugs-return-607617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 16:49:08 2018
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From: "sgunderson at bigfoot dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86214] New: [8 Regression] Strongly increased stack usage
Date: Tue, 19 Jun 2018 16:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86214
Bug ID: 86214
Summary: [8 Regression] Strongly increased stack usage
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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Created attachment 44296
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44296&action=edit
Test case
Hi,
We noticed that MySQL does not pass its test suite when compiled with GCC 8; it
runs out of stack. (GCC 7 is fine.) A reduced test case is included (mostly by
C-Reduce, but it needed some help by hand); most of it appears to be fluff that
keeps the compiler from just optimizing away the entire thing, but the gist of
it seems to be that it inlines the bg::bl() function several times without
caring that it balloons the stack size, and then doesn't manage to shrink the
stack again by overlapping variables. Putting the noinline attribute on
bg::bl() seems to be a workaround for now.
For comparison:
> g++-7 -O2 -Wstack-usage=1 -Wno-return-type -Wno-unused-result -c stack.i
stack.i: In function ‘void c()’:
stack.i:34:6: warning: stack usage is 8240 bytes [-Wstack-usage=]
void c() {
^
> g++-8 -O2 -Wstack-usage=1 -Wno-return-type -Wno-unused-result -c stack.i
stack.i: In function ‘void c()’:
stack.i:34:6: warning: stack usage is 32816 bytes [-Wstack-usage=]
void c() {
^
The actual, unreduced file can be found at
https://github.com/mysql/mysql-server/blob/8.0/storage/innobase/row/row0ins.cc#L926
(the line is positioned on a function whose adding noinline helps, although I
don't think it corresponds directly to bg::bl; I think bg::bl might be
ib::error, and the 8192-sized buffer comes from ib::logger::msg).
>From gcc-bugs-return-607618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 17:14:36 2018
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From: "franke at computer dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Tue, 19 Jun 2018 17:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86138
--- Comment #5 from Christian Franke <franke at computer dot org> ---
(In reply to Jonathan Wakely from comment #4)
> (In reply to Christian Franke from comment #3)
> > > The extern templates are disabled because std::basic_string has additional
> > > member functions in C++17 mode, and they're not instantiated in the library.
> > > By disabling the explicit instantiation declarations the compiler will emit
> > > definitions for the C++17-only member functions.
> > This has no effect due to the bogus specialization in basic_string.h (see
> > patch below).
>
> What's bogus about it?
Here a simple example which demonstrates the same situation:
$ cat bug.cpp
template<typename T> void f(T & x) { x = T(); }
#ifndef FIXED
template<> void f(int &);
// no visible implementation => same effect as extern template below!
#endif
#if __cplusplus <= 201402L
extern template void f(int &);
#endif
void call_f(int & i) {
f(i);
}
$ g++ -std=c++14 -c -o bug-14.o bug.cpp
$ g++ -std=c++17 -c -o bug-17.o bug.cpp
$ g++ -std=c++17 -DFIXED -c -o bug-17-fixed.o bug.cpp
$ diff -qs bug-14.o bug-17.o ; diff -qs bug-17.o bug-17-fixed.o
Files bug-14.o and bug-17.o are identical
Files bug-17.o and bug-17-fixed.o differ
$ nm -C bug-17.o | grep ' [TU] '
U void f<int>(int&)
0000000000000000 T call_f(int&)
$ nm -C bug-17-fixed.o | grep ' [TU] '
0000000000000000 T void f<int>(int&)
0000000000000000 T call_f(int&)
> This patch won't be accepted, it's papering over some other problem not
> fixing anything.
I disagree. This should be fixed anyway, see above.
>From gcc-bugs-return-607619-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 17:20:46 2018
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From: "franke at computer dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Tue, 19 Jun 2018 17:20:00 -0000
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--- Comment #6 from Christian Franke <franke at computer dot org> ---
(In reply to Jonathan Wakely from comment #4)
> Could you please debug this to find where it's crashing and why?
It segfaults with a bogus pointer below std::string::_Rep::_M_dispose().
A comparison of assembly output and object file symbols leads to the root of
the problem:
1) -std=c++14: string::string() and getline() are called from cygstdc++6.dll.
OK.
2) -std=c++17: getline() is called from cygstdc++6.dll. All code for
string::string() is part of the executable. The empty string is initialized
with the static std::string::_Rep::_S_empty_rep_storage[] from the executable.
But getline() uses the string() implementation from the DLL which checks
against the DLL version of _S_empty_rep_storage[] here:
_M_dispose(const _Alloc& __a) _GLIBCXX_NOEXCEPT
{
#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
if (__builtin_expect(this != &_S_empty_rep(), false))
#endif
{ ... }
This finally results in a bogus delete[] of the _S_empty_rep_storage[] from the
executable.
2) -std=c++17 -static: The linker does not pull another _S_empty_rep_storage[]
from the static library because it already exists in the object file. OK.
This version of the testcase does not crash because _S_empty_rep_storage[] is
not used:
int main()
{
std::string line("x");
std::istringstream stream("*");
std::getline(stream, line, '\n');
return (int)line.c_str()[0];
}
>From gcc-bugs-return-607620-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 17:31:28 2018
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Subject: [Bug middle-end/85602] -Wsizeof-pointer-memaccess for strncat with size of source
Date: Tue, 19 Jun 2018 17:31:00 -0000
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--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
Thanks, r261751 should take care of it.
>From gcc-bugs-return-607621-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 17:31:32 2018
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Subject: [Bug middle-end/85602] -Wsizeof-pointer-memaccess for strncat with size of source
Date: Tue, 19 Jun 2018 17:31:00 -0000
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--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
Thanks, r261751 should take care of it.
--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Jun 19 17:30:47 2018
New Revision: 261751
URL: https://gcc.gnu.org/viewcvs?rev=261751&root=gcc&view=rev
Log:
gcc/testsuite/ChangeLog:
PR middle-end/85602
* c-c++-common/attr-nonstring-8.c: Adjust text of expected warning
to also match C++.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/attr-nonstring-8.c
>From gcc-bugs-return-607622-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 17:37:03 2018
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Subject: [Bug tree-optimization/86203] duplicate non-constant call to strlen() not folded
Date: Tue, 19 Jun 2018 17:37:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
You're right, a strict reading of the standard does imply that the pointer
argument to strlen could point to the integer. I keep forgetting about this
unfortunate loophole. Ironically, the equivalent code using snprintf could be
optimized because the argument to %s "shall be a pointer to the initial element
of an array of character type." I.e., it cannot point to an int object:
int n;
int f (char *s)
{
n = __builtin_snprintf (0, 0, "%s", s);
return __builtin_snprintf (0, 0, "%s", s); // could be replaced by return
n;
}
>From gcc-bugs-return-607623-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 17:44:38 2018
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Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Tue, 19 Jun 2018 17:44:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
OK, so then this is the whack Windows linker model, where every DLL has its own
address space, and probably the same as PR 81522.
Does Cygwin default to _GLIBCXX_USE_CXX11_ABI=0?
>From gcc-bugs-return-607624-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 17:47:02 2018
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Subject: [Bug c++/86190] [6/7/8/9 Regression] -Wsign-conversion ignores explicit conversion in some cases
Date: Tue, 19 Jun 2018 17:47:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The warning is produced in
5350 if (! converted)
5351 {
5352 if (TREE_TYPE (op0) != result_type)
5353 op0 = cp_convert_and_check (result_type, op0, complain);
5354 if (TREE_TYPE (op1) != result_type)
5355 op1 = cp_convert_and_check (result_type, op1, complain);
which we didn't enter before, because of this hunk:
@@ -5028,20 +5022,12 @@ cp_build_binary_op (location_t location,
if (short_compare)
{
- /* Don't write &op0, etc., because that would prevent op0
- from being kept in a register.
- Instead, make copies of the our local variables and
- pass the copies by reference, then copy them back afterward. */
- tree xop0 = op0, xop1 = op1, xresult_type = result_type;
+ /* We call shorten_compare only for diagnostic-reason. */
+ tree xop0 = fold_simple (op0), xop1 = fold_simple (op1),
+ xresult_type = result_type;
enum tree_code xresultcode = resultcode;
- tree val
- = shorten_compare (location, &xop0, &xop1, &xresult_type,
+ shorten_compare (location, &xop0, &xop1, &xresult_type,
&xresultcode);
- if (val != 0)
- return cp_convert (boolean_type_node, val, complain);
- op0 = xop0, op1 = xop1;
- converted = 1;
- resultcode = xresultcode;
}
if ((short_compare || code == MIN_EXPR || code == MAX_EXPR)
so converted is now 0 whereas before it was 1.
>From gcc-bugs-return-607625-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 17:51:49 2018
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Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Tue, 19 Jun 2018 17:51:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Christian Franke from comment #5)
> (In reply to Jonathan Wakely from comment #4)
> > What's bogus about it?
>
> Here a simple example which demonstrates the same situation:
>
> $ cat bug.cpp
> template<typename T> void f(T & x) { x = T(); }
>
> #ifndef FIXED
> template<> void f(int &);
> // no visible implementation => same effect as extern template below!
Not true. Declaring the specialization says there is an explicit
specialization. That's not the same as declaring an explicit instantiation.
Both will prevent the implicit instantiation of the primary template, but they
still mean different things.
You still haven't explained why declaring the specialization is bogus. The
explicit specialization is defined at
https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=libstdc%2B%2B-v3/src/c%2B%2B98/istream-string.cc;h=feb3569c8be48539af52b66d6462c455dfd09a47;hb=HEAD#l120
Why do you think it's bogus to declare that?
"It fixes my crash" doesn't make it bogus.
> > This patch won't be accepted, it's papering over some other problem not
> > fixing anything.
>
> I disagree. This should be fixed anyway, see above.
There's nothing to fix.
If Cygwin doesn't correctly ensure uniqueness of static objects across DLLs
then we can't workaround that, but simply deleting the declaration of the
specialization is wrong (and will result in worse performance because the
specialization for 'char' will not be used when it could be).
Does Cygwin's binutils not support STB_GNU_UNIQUE or the equivalent?
>From gcc-bugs-return-607626-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 17:58:02 2018
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Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Tue, 19 Jun 2018 17:58:00 -0000
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Christian Franke from comment #0)
> This is because there is a bogus prototype specialization in basic_string.h:
>
> template<>
> basic_istream<char>&
> getline(basic_istream<char>& __in, basic_string<char>& __str,
> char __delim);
>
> There is no implementation for this specialization.
As stated above, tThis is wrong, see src/c++98/istream-string.cc where the
specialization is defined.
> This has apparently the
> same effect as the 'extern template' which is disabled for C++17 in
> basic_string.tcc:
>
> #if _GLIBCXX_EXTERN_TEMPLATE > 0 && __cplusplus <= 201402L
> ...
> extern template
> basic_istream<char>&
> getline(basic_istream<char>&, string&, char);
> ...
> #endif
>
> As a consequence, no C++17 compatible code for this getline() is generated
> and the old getline() from cygstdc++-6.dll is called instead.
The problem is nothing to do with "C++17 compatible code" it's entirely to do
with whether the std::string template is instantiated in the current
translation unit, or only in the DLL. Cygwin apparently can't combine
definitions of static objects across DLLs, and so fails when anything is
instantiated in the current translation unit (so presumably would also happen
with Debug Mode, and if _GLIBCXX_EXTERN_TEMPLATE=0, independent of C++14 vs
C++17 modes).
>From gcc-bugs-return-607627-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 18:00:58 2018
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Subject: [Bug libgcc/86215] New: Exceptions are broken on OSX when linking with -static-libgcc
Date: Tue, 19 Jun 2018 18:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86215
Bug ID: 86215
Summary: Exceptions are broken on OSX when linking with
-static-libgcc
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
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Target Milestone: ---
If I compile program below with g++-7 main.cpp -static-libgcc -static-libstdc++
and run it on OSX, I get
$ ./a.out
Abort trap: 6
$ echo $?
134
instead of printing abc123 as expected
/////////// main.cpp
#include <exception>
#include <iostream>
int main() try {
throw std::runtime_error{"abc123"};
return 0;
} catch (const std::runtime_error& e) {
std::cout << e.what() << "\n";
return 0;
}
//////////////////////
Additional information about the environment
$ uname -a
Darwin Ryans-MacBook-Pro.local 16.7.0 Darwin Kernel Version 16.7.0: Thu Jun 15
17:36:27 PDT 2017; root:xnu-3789.70.16~2/RELEASE_X86_64 x86_64
$ g++-7 --version
g++-7 (Homebrew GCC 7.3.0_1) 7.3.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See also https://stackoverflow.com/q/50920999/4447365
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Subject: [Bug c++/81668] LTO ODR warnings are not helpful
Date: Tue, 19 Jun 2018 18:07:00 -0000
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--- Comment #12 from sgunderson at bigfoot dot com ---
The spurious warning seems to be gone in GCC 8.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/65416] xtensa: memory allocated by alloca is used before the stack pointer is updated
Date: Tue, 19 Jun 2018 18:26:00 -0000
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--- Comment #3 from jcmvbkbc at gcc dot gnu.org ---
Author: jcmvbkbc
Date: Tue Jun 19 18:26:07 2018
New Revision: 261755
URL: https://gcc.gnu.org/viewcvs?rev=261755&root=gcc&view=rev
Log:
xtensa: fix PR target/65416
The issue is caused by reordering of stack pointer update after stack
space allocation with instructions that write to the allocated stack
space. In windowed ABI register spill area for the previous call frame
is located just below the stack pointer and may be reloaded back into
the register file on movsp.
Implement allocate_stack pattern for windowed ABI configuration and
insert an instruction that prevents reordering of frame memory access
and stack pointer update.
gcc/
2018-06-19 Max Filippov <jcmvbkbc@gmail.com>
* config/xtensa/xtensa.md (UNSPEC_FRAME_BLOCKAGE): New unspec
constant.
(allocate_stack, frame_blockage, *frame_blockage): New patterns.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/xtensa/xtensa.md
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86216] New: g++ ICE on valid code: verify_ssa failed
Date: Tue, 19 Jun 2018 18:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86216
Bug ID: 86216
Summary: g++ ICE on valid code: verify_ssa failed
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: helloqirun at gmail dot com
Target Milestone: ---
g++8.1 emits yet another error...
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 9.0.0 20180619 (experimental) [trunk revision 261742] (GCC)
$ g++-trunk -c abc.c
abc.c: In lambda function:
abc.c:11:23: error: definition in block 2 follows the use
int main() { b(2, 3); }
^
for SSA_NAME: _1 in statement:
_1 = _1 + 1;
during GIMPLE pass: ssa
abc.c:11:23: internal compiler error: verify_ssa failed
0x108c557 verify_ssa(bool, bool)
../../gcc/gcc/tree-ssa.c:1188
0xdcc8ad execute_function_todo
../../gcc/gcc/passes.c:1950
0xdcd6be execute_todo
../../gcc/gcc/passes.c:1997
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.
$ g++-8.1 abc.c
during RTL pass: expand
abc.c: In lambda function:
abc.c:7:5: internal compiler error: in expand_expr_real_1, at expr.c:10001
n = sizeof(buffer1[n]);
^
0x5d5fbe expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc-8.1.0/gcc/expr.c:9995
0x8e9202 expand_expr
../../gcc-8.1.0/gcc/expr.h:280
0x8e9202 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifi er)
../../gcc-8.1.0/gcc/expr.c:8466
0x7e9151 expand_gimple_stmt_1
../../gcc-8.1.0/gcc/cfgexpand.c:3729
0x7e9151 expand_gimple_stmt
../../gcc-8.1.0/gcc/cfgexpand.c:3790
0x7ea0df expand_gimple_basic_block
../../gcc-8.1.0/gcc/cfgexpand.c:5819
0x7ef4e6 execute
../../gcc-8.1.0/gcc/cfgexpand.c:6425
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ cat abc.c
typedef int intptr_t;
template <typename T> void b(intptr_t n, T arg) {
typedef intptr_t ArrTy[arg];
ArrTy buffer2;
ArrTy buffer1[arg];
[&] {
n = sizeof(buffer1[n]);
[&] { n = sizeof(buffer2); }();
}();
}
int main() { b(2, 3); }
>From gcc-bugs-return-607631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 18:31:11 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++/86216] g++ ICE on valid code: verify_ssa failed
Date: Tue, 19 Jun 2018 18:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86216
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-19
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed. Even GCC 5 ICEs.
>From gcc-bugs-return-607632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 18:34:23 2018
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From: "hans.buchmann at fhnw dot ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86217] New: option aux-info
Date: Tue, 19 Jun 2018 18:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86217
Bug ID: 86217
Summary: option aux-info
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: hans.buchmann at fhnw dot ch
Target Milestone: ---
Created attachment 44297
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44297&action=edit
The output file
Compiling the code
----------------------------
static inline int arch_within_stack_frames(const void * const stack,
const void * const stackend,
const void *obj, unsigned long len)
{
return 0;
}
static int arch_within_stack_frames(const void * const stack,
const void * const stackend,
const void *obj, unsigned long len);
---------------------------
with
gcc -aux-info aux-info.data \
-c \
-oaux-info.o \
aux-info.c
yields for aux-info.data:
---------------------------------------------------
/* compiled from: . */
/* aux-info.c:2:NF */
static int arch_within_stack_frames (const void *const const stack, const void
*const const stackend, const void *obj, long unsigned int len);
// !!!!!!twice
const
/* (stack, stackend, obj, len) const void *const const stack; const void *const
const stackend; const void *obj; long unsigned int len; */
/* aux-info.c:10:NC */
static int arch_within_stack_frames (const void *const , const void *const ,
const void *, long unsigned int);
--------------------------------------------
it seems that the keyword 'inline' doubles the keyword const.
gcc -v:
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
Thread model: posix
gcc version 8.1.1 20180531 (GCC)
Sincerely
Hans Buchmann
>From gcc-bugs-return-607633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 18:46:48 2018
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Subject: [Bug target/65416] xtensa: memory allocated by alloca is used before the stack pointer is updated
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jcmvbkbc at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from jcmvbkbc at gcc dot gnu.org ---
The fix is committed to trunk.
>From gcc-bugs-return-607634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 18:47:30 2018
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86192] A not fully fixed bug?
Date: Tue, 19 Jun 2018 18:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86192
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Jun 19 18:46:51 2018
New Revision: 261757
URL: https://gcc.gnu.org/viewcvs?rev=261757&root=gcc&view=rev
Log:
PR c++/86192 - ICE with anonymous union passed to template.
* pt.c (tsubst_expr) [DECL_EXPR]: Handle an anonymous union type
used to declare a named variable.
Added:
trunk/gcc/testsuite/g++.dg/template/anonunion3.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
>From gcc-bugs-return-607635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 18:47:42 2018
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From: "gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86218] New: [9 Regression] ICE in compare_ics, at cp/call.c:9769
Date: Tue, 19 Jun 2018 18:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86218
Bug ID: 86218
Summary: [9 Regression] ICE in compare_ics, at cp/call.c:9769
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Changed recently, between 20180603 and 20180610 :
$ cat z1.cc
template <int a>
void f (const char (&)[a]) { }
void f (int) { }
template <class...a>
void
g ()
{
f ({2.0});
}
$ gcc-9-20180603 -c z1.cc
$
$ gcc-9-20180617 -c z1.cc
z1.cc: In function 'void g()':
z1.cc:8:11: internal compiler error: Segmentation fault
f ({2.0});
^
0xbabeff crash_signal
../../gcc/toplev.c:324
0x632448 compare_ics
../../gcc/cp/call.c:9769
0x635552 joust
../../gcc/cp/call.c:10158
0x636433 joust
../../gcc/cp/call.c:10094
0x636433 tourney
../../gcc/cp/call.c:10560
0x63ccf8 perform_overload_resolution
../../gcc/cp/call.c:4209
0x63e0d2 build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../../gcc/cp/call.c:4274
0x74ae15 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
../../gcc/cp/semantics.c:2544
0x6f8ced cp_parser_postfix_expression
../../gcc/cp/parser.c:7219
0x700507 cp_parser_unary_expression
../../gcc/cp/parser.c:8295
0x6e0e72 cp_parser_cast_expression
../../gcc/cp/parser.c:9063
0x6e1511 cp_parser_binary_expression
../../gcc/cp/parser.c:9164
0x6e1bc3 cp_parser_assignment_expression
../../gcc/cp/parser.c:9459
0x6e2264 cp_parser_expression
../../gcc/cp/parser.c:9628
0x6e4d94 cp_parser_expression_statement
../../gcc/cp/parser.c:11106
0x6ec8b7 cp_parser_statement
../../gcc/cp/parser.c:10910
0x6ed5b7 cp_parser_statement_seq_opt
../../gcc/cp/parser.c:11249
0x6ed68f cp_parser_compound_statement
../../gcc/cp/parser.c:11203
0x6fed01 cp_parser_function_body
../../gcc/cp/parser.c:21886
0x6fed01 cp_parser_ctor_initializer_opt_and_function_body
../../gcc/cp/parser.c:21921
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86219] New: [8/9 Regression] ICE in coerce_template_parms, at cp/pt.c:8515
Date: Tue, 19 Jun 2018 18:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86219
Bug ID: 86219
Summary: [8/9 Regression] ICE in coerce_template_parms, at
cp/pt.c:8515
Product: gcc
Version: 9.0
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Changed between 20180318 and 20180325 :
$ cat z1.cc
template <int a> struct t;
template <int a>
void f ()
{
const int b = "";
t<b>::c;
}
$ gcc-8-20180318 -c z1.cc
$
$ gcc-9-20180617 -c z1.cc
z1.cc: In function 'void f()':
z1.cc:6:7: internal compiler error: in coerce_template_parms, at cp/pt.c:8515
t<b>::c;
^
0x725621 coerce_template_parms
../../gcc/cp/pt.c:8515
0x72d802 lookup_template_class_1
../../gcc/cp/pt.c:9295
0x72d802 lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
../../gcc/cp/pt.c:9647
0x74a71d finish_template_type(tree_node*, tree_node*, int)
../../gcc/cp/semantics.c:3240
0x6f12a2 cp_parser_template_id
../../gcc/cp/parser.c:15943
0x6f13a5 cp_parser_class_name
../../gcc/cp/parser.c:22478
0x6f9ef7 cp_parser_qualifying_entity
../../gcc/cp/parser.c:6564
0x6f9ef7 cp_parser_nested_name_specifier_opt
../../gcc/cp/parser.c:6250
0x6f7dde cp_parser_simple_type_specifier
../../gcc/cp/parser.c:17270
0x6eae95 cp_parser_type_specifier
../../gcc/cp/parser.c:16945
0x6fc399 cp_parser_decl_specifier_seq
../../gcc/cp/parser.c:13709
0x703381 cp_parser_simple_declaration
../../gcc/cp/parser.c:13018
0x704e89 cp_parser_declaration_statement
../../gcc/cp/parser.c:12556
0x6eca95 cp_parser_statement
../../gcc/cp/parser.c:10900
0x6ed5b7 cp_parser_statement_seq_opt
../../gcc/cp/parser.c:11249
0x6ed68f cp_parser_compound_statement
../../gcc/cp/parser.c:11203
0x6fed01 cp_parser_function_body
../../gcc/cp/parser.c:21886
0x6fed01 cp_parser_ctor_initializer_opt_and_function_body
../../gcc/cp/parser.c:21921
0x6ff4d0 cp_parser_function_definition_after_declarator
../../gcc/cp/parser.c:26937
0x7024e1 cp_parser_function_definition_from_specifiers_and_declarator
../../gcc/cp/parser.c:26854
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86220] New: [9 Regression] ICE in gfc_conv_structure, at fortran/trans-expr.c:7789
Date: Tue, 19 Jun 2018 18:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86220
Bug ID: 86220
Summary: [9 Regression] ICE in gfc_conv_structure, at
fortran/trans-expr.c:7789
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gscfq@t-online.de
Target Milestone: ---
Introduced between 20180520 and 20180527.
Inspired by gfortran.dg/data_stmt_pointer.f90 :
$ cat z1.f90
program p
type t
real :: a = 1
integer, pointer :: b
end type
type(t) :: z
integer, save, target :: x = 789
data z%b /x/
end
$ gfortran-9-20180520 -c z1.f90
z1.f90:8:14:
data z%b /x/
1
Error: Symbol 'x' must be a PARAMETER in DATA statement at (1)
$ gfortran-9-20180617 -c z1.f90
z1.f90:1:0:
program p
internal compiler error: Segmentation fault
0xb4d14f crash_signal
../../gcc/toplev.c:324
0x7392f0 gfc_conv_structure(gfc_se*, gfc_expr*, int)
../../gcc/fortran/trans-expr.c:7789
0x738ec1 gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
../../gcc/fortran/trans-expr.c:6951
0x7232fa gfc_get_symbol_decl(gfc_symbol*)
../../gcc/fortran/trans-decl.c:1795
0x726007 generate_local_decl
../../gcc/fortran/trans-decl.c:5558
0x6ead4b do_traverse_symtree
../../gcc/fortran/symbol.c:4167
0x7270fc generate_local_vars
../../gcc/fortran/trans-decl.c:5758
0x7270fc gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6402
0x6b63e0 translate_all_program_units
../../gcc/fortran/parse.c:6125
0x6b63e0 gfc_parse_file()
../../gcc/fortran/parse.c:6328
0x6fd4ff gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-607638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 18:57:18 2018
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From: "tydeman at tybor dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86221] New: _Generic not match function return that has _Atomic
Date: Tue, 19 Jun 2018 18:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86221
Bug ID: 86221
Summary: _Generic not match function return that has _Atomic
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: tydeman at tybor dot com
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static int * f1(void){return NULL;}
int main(void){
int i = _Generic(f1, int * _Atomic (*)(void): 1, default: 0);
return i;
}
The above _Generic() should match, but does not.
If _Atomic is replaced with any of: const, volatile, restrict,
then it works as expected.
>From gcc-bugs-return-607639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 18:57:27 2018
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Subject: [Bug c++/86218] [9 Regression] ICE in compare_ics, at cp/call.c:9769
Date: Tue, 19 Jun 2018 18:57:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-19
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r261241.
>From gcc-bugs-return-607640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 19:01:34 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86219] [8/9 Regression] ICE in coerce_template_parms, at cp/pt.c:8515
Date: Tue, 19 Jun 2018 19:01:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-19
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |8.2
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r258659.
>From gcc-bugs-return-607641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 19:05:36 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/38658] trivial try/catch statement not eliminated
Date: Tue, 19 Jun 2018 19:05:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|INVALID |---
Summary|inefficient code on trivial |trivial try/catch statement
|try/catch statement |not eliminated
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
There are situations when throwing an exception is required to result in a call
to std::terminate() but those require the exception to escape the function
where it's thrown from. Outside of those, it seems to me that as long as the
observable effect of the optimized code is indistinguishable from the original
(such as in the test case) removing try/catch statements should be a valid
optimization.
Allocating memory is not an observable effect of throwing an exception so it
doesn't count. std::uncaught_exception() has to be called along the way so
that is also out to the extent that GCC can see the code between the throw
expression and the catch block.
It's clear that not all cases can be optimized as I suggest but I believe at
least some of them can (the one in the test case in comment #0). I'm going to
reopen this request. If it turns out that there's something I'm missing we can
close it once it's made clear in a test case that the optimization would either
be invalid even in that subset of cases, or if it looks like it would not be
profitable enough to bother.
>From gcc-bugs-return-607642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 19:55:45 2018
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86221] _Generic not match function return that has _Atomic
Date: Tue, 19 Jun 2018 19:55:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
The C17 specification for function return types says "function returning
the unqualified version of T", not "function returning the unqualified,
non-atomic version of T". I believe the normal rule applies that _Atomic,
although syntactically a qualifier, is not treated as such unless
explicitly stated otherwise (in line with the possibility that an atomic
type has different size and alignment, for example, so a function
returning an atomic type could quite possibly have a different ABI from a
function returning the corresponding non-atomic type). So I believe GCC
is correct to have the _Generic match with const, volatile and restrict
but not _Atomic.
>From gcc-bugs-return-607643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 19:58:01 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86220] [9 Regression] ICE in gfc_conv_structure, at fortran/trans-expr.c:7789
Date: Tue, 19 Jun 2018 19:58:00 -0000
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--- Comment #1 from kargl at gcc dot gnu.org ---
(In reply to G. Steinmetz from comment #0)
> Introduced between 20180520 and 20180527.
It wasn't introduced. It wa uncovered. :-)
>
> $ cat z1.f90
> program p
> type t
> real :: a = 1
> integer, pointer :: b
> end type
> type(t) :: z
> integer, save, target :: x = 789
> data z%b /x/
> end
>
The code is invalid Fortran, so technically gfortran
can do anything including ICE.
>From gcc-bugs-return-607644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 20:20:07 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/86222] New: ICE in final_scan_insn_1 calling strncmp() with a bound of PTRDIFF_MAX + 1
Date: Tue, 19 Jun 2018 20:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86222
Bug ID: 86222
Summary: ICE in final_scan_insn_1 calling strncmp() with a
bound of PTRDIFF_MAX + 1
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
The following test case was reduced from a powerpc-ibm-aix7.2 ICE in the
gcc.dg/attr-nonstring-3.c test case added in r261704:
$ cat c.i && /ssd/build/powerpc-ibm-aix7.2/gcc-8-branch/gcc/xgcc -B
/ssd/build/powerpc-ibm-aix7.2/gcc-8-branch/gcc -S -O2 -Wall -Wextra
-fdump-tree-optimized=/dev/stdout c.i
typedef typeof (sizeof 0) size_t;
extern int strncmp (const char*, const char*, size_t);
int f (void)
{
size_t n = 0x7fffffffL; // PTRDIFF_MAX
extern char a[];
extern char b[16];
return strncmp (a, b, n + 1);
}
;; Function f (f, funcdef_no=0, decl_uid=2619, cgraph_uid=0, symbol_order=0)
f ()
{
int _2;
<bb 2> [local count: 1073741825]:
_2 = strncmp (&a, &b, 2147483648); [tail call]
return _2;
}
c.i: In function ‘f’:
c.i:12:1: error: could not split insn
}
^
(insn 116 118 194 (set (reg:SI 5 5)
(const_int -2147483680 [0xffffffff7fffffe0])) "c.i":11 485
{*movsi_internal1}
(nil))
during RTL pass: final
c.i:12:1: internal compiler error: in final_scan_insn_1, at final.c:3142
0xfed675 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/src/gcc/8-branch/gcc/rtl-error.c:108
0xb5c13c final_scan_insn_1
/src/gcc/8-branch/gcc/final.c:3142
0xb5c7a9 final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
/src/gcc/8-branch/gcc/final.c:3221
0xb58a26 final_1
/src/gcc/8-branch/gcc/final.c:2091
0xb616ce rest_of_handle_final
/src/gcc/8-branch/gcc/final.c:4674
0xb61b56 execute
/src/gcc/8-branch/gcc/final.c:4748
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-607645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 20:58:26 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/65416] xtensa: memory allocated by alloca is used before the stack pointer is updated
Date: Tue, 19 Jun 2018 20:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65416
--- Comment #5 from jcmvbkbc at gcc dot gnu.org ---
Author: jcmvbkbc
Date: Tue Jun 19 20:57:46 2018
New Revision: 261763
URL: https://gcc.gnu.org/viewcvs?rev=261763&root=gcc&view=rev
Log:
xtensa: fix PR target/65416
The issue is caused by reordering of stack pointer update after stack
space allocation with instructions that write to the allocated stack
space. In windowed ABI register spill area for the previous call frame
is located just below the stack pointer and may be reloaded back into
the register file on movsp.
Implement allocate_stack pattern for windowed ABI configuration and
insert an instruction that prevents reordering of frame memory access
and stack pointer update.
gcc/
2018-06-19 Max Filippov <jcmvbkbc@gmail.com>
Backport from mainline
2018-06-19 Max Filippov <jcmvbkbc@gmail.com>
* config/xtensa/xtensa.md (UNSPEC_FRAME_BLOCKAGE): New unspec
constant.
(allocate_stack, frame_blockage, *frame_blockage): New patterns.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/xtensa/xtensa.md
>From gcc-bugs-return-607646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 21:01:59 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/65416] xtensa: memory allocated by alloca is used before the stack pointer is updated
Date: Tue, 19 Jun 2018 21:01:00 -0000
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--- Comment #6 from jcmvbkbc at gcc dot gnu.org ---
Author: jcmvbkbc
Date: Tue Jun 19 21:01:22 2018
New Revision: 261764
URL: https://gcc.gnu.org/viewcvs?rev=261764&root=gcc&view=rev
Log:
xtensa: fix PR target/65416
The issue is caused by reordering of stack pointer update after stack
space allocation with instructions that write to the allocated stack
space. In windowed ABI register spill area for the previous call frame
is located just below the stack pointer and may be reloaded back into
the register file on movsp.
Implement allocate_stack pattern for windowed ABI configuration and
insert an instruction that prevents reordering of frame memory access
and stack pointer update.
gcc/
2018-06-19 Max Filippov <jcmvbkbc@gmail.com>
Backport from mainline
2018-06-19 Max Filippov <jcmvbkbc@gmail.com>
* config/xtensa/xtensa.md (UNSPEC_FRAME_BLOCKAGE): New unspec
constant.
(allocate_stack, frame_blockage, *frame_blockage): New patterns.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/xtensa/xtensa.md
>From gcc-bugs-return-607647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 21:02:41 2018
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Subject: [Bug fortran/86206] ICE in gfc_resolve_forall, at fortran/resolve.c:9989
Date: Tue, 19 Jun 2018 21:02:00 -0000
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Harald Anlauf <anlauf at gmx dot de> changed:
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----------------------------------------------------------------------------
CC| |anlauf at gmx dot de
--- Comment #2 from Harald Anlauf <anlauf at gmx dot de> ---
4.8 and 4.9 work, thus 5 regression.
>From gcc-bugs-return-607648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 21:09:23 2018
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From: "jcmvbkbc at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/65416] xtensa: memory allocated by alloca is used before the stack pointer is updated
Date: Tue, 19 Jun 2018 21:09:00 -0000
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--- Comment #7 from jcmvbkbc at gcc dot gnu.org ---
Author: jcmvbkbc
Date: Tue Jun 19 21:08:46 2018
New Revision: 261765
URL: https://gcc.gnu.org/viewcvs?rev=261765&root=gcc&view=rev
Log:
xtensa: fix PR target/65416
The issue is caused by reordering of stack pointer update after stack
space allocation with instructions that write to the allocated stack
space. In windowed ABI register spill area for the previous call frame
is located just below the stack pointer and may be reloaded back into
the register file on movsp.
Implement allocate_stack pattern for windowed ABI configuration and
insert an instruction that prevents reordering of frame memory access
and stack pointer update.
gcc/
2018-06-19 Max Filippov <jcmvbkbc@gmail.com>
Backport from mainline
2018-06-19 Max Filippov <jcmvbkbc@gmail.com>
* config/xtensa/xtensa.md (UNSPEC_FRAME_BLOCKAGE): New unspec
constant.
(allocate_stack, frame_blockage, *frame_blockage): New patterns.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/xtensa/xtensa.md
>From gcc-bugs-return-607649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 21:11:05 2018
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From: "dblaikie at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/48665] type of const member function
Date: Tue, 19 Jun 2018 21:11:00 -0000
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David Blaikie <dblaikie at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |dblaikie at gmail dot com,
| |richard-gccbugzilla@metafoo
| |.co.uk
--- Comment #15 from David Blaikie <dblaikie at gmail dot com> ---
(jumping in here from https://bugs.llvm.org/show_bug.cgi?id=37846 )
Rejecting 'typeid(void() const)' seems like rejecting valid (if uncommon) code.
Perhaps this should be fixed to accept the code, rather than reject it?
"The compiler still reuses the same representation for const/volatile and for
some attributes, sometimes misinterpreting one for the other." - sounds like
rejecting this valid code is a workaround for that choice of representation?
>From gcc-bugs-return-607650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 21:12:41 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++/86218] [9 Regression] ICE in compare_ics, at cp/call.c:9769
Date: Tue, 19 Jun 2018 21:12:00 -0000
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Is this really valid though?
clang++ says
86218.C:8:7: error: type 'double' cannot be narrowed to 'char' in initializer
list [-Wc++11-narrowing]
and if I use
f ({static_cast<char>(2.0)});
then g++ compiles it fine.
>From gcc-bugs-return-607651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 21:46:30 2018
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Subject: [Bug middle-end/85602] -Wsizeof-pointer-memaccess for strncat with size of source
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--- Comment #11 from seurer at gcc dot gnu.org ---
It is fixed now. Thanks!
>From gcc-bugs-return-607653-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 21:47:30 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 libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Tue, 19 Jun 2018 21:47:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |irfanadilovic at gmail dot com
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 81522 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 21:47:29 2018
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Subject: [Bug libstdc++/81522] c++17/old-abi/cygwin empty stringstream invalid memory access
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Looks like Bug 86138
*** This bug has been marked as a duplicate of bug 86138 ***
>From gcc-bugs-return-607654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 21:59:57 2018
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Subject: [Bug c++/48665] type of const member function
Date: Tue, 19 Jun 2018 21:59:00 -0000
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--- Comment #16 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's not valid.
[expr.typeid] p5 says typeid(cv T) is the same as typeid(T) but that isn't
relevant here. 'void () const' is not the cv-qualified version of 'void ()',
because there are no cv-qualified function types. See [dcl.fct] p7.
'void () const' is a function type with a cv-qualifier-seq and can only appear
in a few specific places, which does not include a typeid expression. See
[dcl.fct] p6.
>From gcc-bugs-return-607655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 22:05:25 2018
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Subject: [Bug c++/48665] type of const member function
Date: Tue, 19 Jun 2018 22:05:00 -0000
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--- Comment #17 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to David Blaikie from comment #15)
> "The compiler still reuses the same representation for const/volatile and
> for some attributes, sometimes misinterpreting one for the other." - sounds
> like rejecting this valid code is a workaround for that choice of
> representation?
That comment you quoted is explaining why the diagnostic printed "void ()
__attribute__((const))" insetad of "void () const", not why the code should be
rejected. It's not rejected because of a limitation in GCC.
>From gcc-bugs-return-607656-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 22:11:12 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86223] New: missing -Warray-bounds on an access to an implicitly zeroed out array
Date: Tue, 19 Jun 2018 22:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86223
Bug ID: 86223
Summary: missing -Warray-bounds on an access to an implicitly
zeroed out array
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
When both bounds of an array index are out of range, GCC diagnoses the use of
the index to refer beyond the bounds of a local array whose elements have all
been explicitly initialized, but it fails to diagnose the same out-of-bounds
access when the array has not been fully initialized.
$ cat d.c && gcc -O2 -S -Wall d.c
void f (int);
void g (unsigned i)
{
if (i < 5 || 123 < i)
i = 5;
int a[3] = { 0 };
f (a[i]); // missing -Warray-bounds
}
void h (unsigned i)
{
if (i < 5 || 123 < i)
i = 5;
int a[3] = { 0, 0, 0 };
f (a[i]); // -Warray-bounds (good)
}
d.c: In function ‘h’:
d.c:18:3: warning: array subscript 5 is above array bounds of ‘int[3]’
[-Warray-bounds]
f (a[i]); // -Warray-bounds (good)
^~~~~~~~
>From gcc-bugs-return-607657-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 22:14:42 2018
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Subject: [Bug tree-optimization/86223] missing -Warray-bounds on an access to an implicitly zeroed out array
Date: Tue, 19 Jun 2018 22:14:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Known to fail| |4.8.4, 4.9.4, 5.5.0, 6.4.0,
| |7.2.0, 8.1.0, 9.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
This was never diagnosed so not a regression.
>From gcc-bugs-return-607658-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 22:34:38 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/48560] [4.6/4.7 Regression] -Warray-bounds fails to detect the out of bound array access
Date: Tue, 19 Jun 2018 22:34:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
CC| |msebor at gcc dot gnu.org
Known to work| |4.5.3, 5.1.0
Blocks| |56456
Resolution|WONTFIX |FIXED
Known to fail| |4.7.4
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The code is diagnosed by recent versions of GCC:
$ cat pr48560.c && gcc -O2 -S -Wall pr48560.c
char
foo1 (int i)
{
static char s[] = "foo";
switch (i)
{
case 30:
return s[30];
}
return s[i];
}
pr48560.c: In function ‘foo1’:
pr48560.c:8:13: warning: array subscript 30 is above array bounds of ‘char[4]’
[-Warray-bounds]
return s[30];
~^~~~
Bisection points to r213045 (gcc 5.1.0) as the commit that restored the
warning. Let me add the test case to the test suite and change the resolution
to fixed.
r213045 | rguenth | 2014-07-25 03:44:57 -0400 (Fri, 25 Jul 2014) | 22 lines
2014-07-25 Richard Biener <rguenther@suse.de>
PR middle-end/61762
PR middle-end/61894
* fold-const.c (native_encode_int): Add and handle offset
parameter to do partial encodings of expr.
(native_encode_fixed): Likewise.
(native_encode_real): Likewise.
(native_encode_complex): Likewise.
(native_encode_vector): Likewise.
(native_encode_string): Likewise.
(native_encode_expr): Likewise.
* fold-const.c (native_encode_expr): Add offset parameter
defaulting to -1.
* gimple-fold.c (fold_string_cst_ctor_reference): Remove.
(fold_ctor_reference): Handle all reads from tcc_constant
ctors.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56456
[Bug 56456] [meta-bug] bogus/missing -Warray-bounds
>From gcc-bugs-return-607660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 22:36:38 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70129] [6 Regression] stdlib.h: No such file or directory when using -isystem /usr/include
Date: Tue, 19 Jun 2018 22:36:00 -0000
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Shaun Jackman <sjackman at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sjackman at gmail dot com
--- Comment #7 from Shaun Jackman <sjackman at gmail dot com> ---
Thanks for reporting and trouble shooting this issue, Markus. This issue also
affects the Linuxbrew package manager. See the downstream issue at
https://github.com/Linuxbrew/brew/issues/724. It'd be great if this issue were
addressed by GCC. Thanks to the trouble shooting here, we can work around the
issue in the mean time.
Cheers,
Shaun
>From gcc-bugs-return-607659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 22:36:21 2018
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Subject: [Bug middle-end/85602] -Wsizeof-pointer-memaccess for strncat with size of source
Date: Tue, 19 Jun 2018 22:36:00 -0000
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--- Comment #12 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Jun 19 22:35:45 2018
New Revision: 261774
URL: https://gcc.gnu.org/viewcvs?rev=261774&root=gcc&view=rev
Log:
PR middle-end/85602 - -Warray-bounds fails to detect the out of bound array
access
gcc/testsuite/ChangeLog:
* c-c++-common/attr-nonstring-8.c: Adjust text of expected warning
to also match C++.
Added:
trunk/gcc/testsuite/gcc.dg/Warray-bounds-28.c
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-607661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 22:37:59 2018
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Subject: [Bug target/86222] ICE in final_scan_insn_1 calling strncmp() with a bound of PTRDIFF_MAX + 1
Date: Tue, 19 Jun 2018 22:37:00 -0000
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David Edelsohn <dje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc-ibm-aix7.2 |powerpc-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-19
CC| |bergner at gcc dot gnu.org,
| |segher at gcc dot gnu.org,
| |wschmidt at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from David Edelsohn <dje at gcc dot gnu.org> ---
Fails for all 32 bit PowerPC.
>From gcc-bugs-return-607662-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 19 23:02:21 2018
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Subject: [Bug libstdc++/70129] [6 Regression] stdlib.h: No such file or directory when using -isystem /usr/include
Date: Tue, 19 Jun 2018 23:02:00 -0000
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to chuck cranor from comment #3)
> I think you'll find most build systems that do "-isystem /usr/include"
> instead of "-I /usr/include" are only using "-isystem" for the change
> in the warning behavior. The change in the include path order is not
> wanted...
Then they should stop (mis)using -isystem, since it's clearly documented to
affect the order directories are searched:
If a standard system include directory, or a directory specified with
-isystem, is also specified with -I, the -I option is ignored. The directory
is still searched but as a system directory at its normal position in the
system include chain. This is to ensure that GCC's procedure to fix buggy
system headers and the ordering for the "#include_next" directive are not
inadvertently changed. If you really need to change the search order for
system directories, use the -nostdinc and/or -isystem options.
The corollary is that you shouldn't use it unless you really need to change the
search order for system directories!
>From gcc-bugs-return-607663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 00:55:20 2018
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Subject: [Bug libfortran/85906] Conditional jump depends on uninitialized value in write_decimal / write_integer
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Fixed
>From gcc-bugs-return-607664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 00:56:59 2018
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Subject: [Bug libstdc++/70966] new_delete_resource() has deinit lifetime issues.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-607665-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 01:12:04 2018
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Subject: [Bug libfortran/78549] Very slow formatted internal file output
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #34 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Closing, have done enough.
>From gcc-bugs-return-607666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 01:59:56 2018
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Subject: [Bug target/86222] ICE in final_scan_insn_1 calling strncmp() with a bound of PTRDIFF_MAX + 1
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Peter Bergner <bergner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |acsawdey at gcc dot gnu.org
--- Comment #2 from Peter Bergner <bergner at gcc dot gnu.org> ---
CCimg Aaron since he's worked on strncmp expansion recently.
>From gcc-bugs-return-607667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 02:07:52 2018
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From: "bugdal at aerifal dot cx" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/86224] New: [m68k] textrels in libgcc
Date: Wed, 20 Jun 2018 02:07:00 -0000
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Bug ID: 86224
Summary: [m68k] textrels in libgcc
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
Reporter: bugdal at aerifal dot cx
Target Milestone: ---
The lb1sf68.S math asm makes calls to its own functions via the PICCALL macro,
which expands to a PC-relative branch. However, the symbols have default
visibilty, and thus are not bound at link-time, leaving R_68K_PC32 textrels in
the output libgcc_s and potentially in PIE programs or shared libraries linked
to the static libgcc.a.
Hidden aliases are probably the best solution. Alternatively the PICCALL macro
could be adjusted to use the @PLT form of the target.
>From gcc-bugs-return-607668-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 02:12:15 2018
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Subject: [Bug c++/86225] New: Missing error message
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86225
Bug ID: 86225
Summary: Missing error message
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
Target Milestone: ---
The code is as follow:
struct A
{
virtual ~A () {}
};
struct B : public A
{
virtual ~B () {}
};
template < int > void foo ()
{
B *b = new B;
b->~A ();
}
int main ()
{
foo < 0 > ();
return 0;
}
g++ accepts the code, but clang++ rejects it. The error message is as follow:
error: destructor type 'A' in object destruction expression does not match the
type 'B' of the object being destroyed
b->~A ();
note: type 'A' is declared here
struct A
^
1 error generated.
Shall g++ present similar error messages?
>From gcc-bugs-return-607669-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 02:23:11 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86226] New: A bug seems to be not fully fixed
Date: Wed, 20 Jun 2018 02:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86226
Bug ID: 86226
Summary: A bug seems to be not fully fixed
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
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The code is as follow:
int main() {
auto l = []<typename>(){};
l.operator()<void>();
}
It was reported in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77914. Michele
Caini complains that g++ does not produce any warnings for this ill-formed
code.
The report is said to be resolved, since 7+.
I tried on 8.0.1 with the same flags, -Wall -pedantic. I got a warning:
lambda templates are only available with -std=c++2a or -std=gnu++2a
So, I change the flag to -std=c++2a. This time, g++ accepts it without any
messages.
I also tried clang++. It produces the following error messages:
error: expected body of lambda expression
auto l = []<typename>(){};
error: expected a qualified name after 'typename'
auto l = []<typename>(){};
It seems that the bug is not fixed, right?
>From gcc-bugs-return-607670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 02:57:59 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86227] New: invalid suffix on floating constant
Date: Wed, 20 Jun 2018 02:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86227
Bug ID: 86227
Summary: invalid suffix on floating constant
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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The code sample is as follow:
#include <typeinfo>
int main() {
typeid( 0.dd );
}
g++ accepts this code, but clang++ rejects it with a message:
error: invalid suffix 'dd' on floating constant
typeid( 0.dd );
Shall g++ reject the code as well?
>From gcc-bugs-return-607671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 03:01:46 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86228] New: ordered comparison between pointer and zero
Date: Wed, 20 Jun 2018 03:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86228
Bug ID: 86228
Summary: ordered comparison between pointer and zero
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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The code is as follow:
extern void* p;
int main() { return ( p<0 ? 1 : 0 ); }
clang++ rejects it with an error message:
error: ordered comparison between pointer and zero ('void *' and 'int')
int main() { return ( p<0 ? 1 : 0 ); }
However, g++ accepts it without any warnings.
Is this code ill-formed?
>From gcc-bugs-return-607672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 04:54:12 2018
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Subject: [Bug c++/86227] invalid suffix on floating constant
Date: Wed, 20 Jun 2018 04:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86227
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Did you add -pedantic-error or use -std=c++11 ? This is the decimal floating
point extension that gcc supports that llvm does not.
>From gcc-bugs-return-607673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 05:04:40 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86227] invalid suffix on floating constant
Date: Wed, 20 Jun 2018 05:04:00 -0000
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--- Comment #2 from zhonghao at pku dot org.cn ---
(In reply to Andrew Pinski from comment #1)
> Did you add -pedantic-error or use -std=c++11 ? This is the decimal
> floating point extension that gcc supports that llvm does not.
I tried.g++ still accepts it and does not produce any error messages.
>From gcc-bugs-return-607674-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 05:07:28 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86227] invalid suffix on floating constant
Date: Wed, 20 Jun 2018 05:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86227
--- Comment #3 from zhonghao at pku dot org.cn ---
(In reply to zhonghao from comment #2)
> (In reply to Andrew Pinski from comment #1)
> > Did you add -pedantic-error or use -std=c++11 ? This is the decimal
> > floating point extension that gcc supports that llvm does not.
>
> I tried.g++ still accepts it and does not produce any error messages.
With the flag, -pedantic -error, g++ produces a warning message, but the
message seems to be irrelevant.
>From gcc-bugs-return-607675-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 05:12:27 2018
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From: "mitranopeter at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/86229] New: ASAN Reports "alloc-dealloc mismatch" intsead of "attempted delete without new"
Date: Wed, 20 Jun 2018 05:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86229
Bug ID: 86229
Summary: ASAN Reports "alloc-dealloc mismatch" intsead of
"attempted delete without new"
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: mitranopeter at gmail dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
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Created attachment 44298
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44298&action=edit
preprocessed file
GCC version: 8.0.1 20180311
System Type: Ubuntu 16.04
GCC Build options: defaults
Compile command: g++ -std=c++11 -fsanitize=address main.cpp
First time reporting here, so forgive me if this out of scope of wontfix. ASAN
gives me different (true) error messages depending on some very strange small
changes to my code.
I either get (1)
alloc-dealloc-mismatch (INVALID vs operator delete)
Or (2)
attempting free on address which was not malloc()-ed:
In the attached preprocessed file, you should see error (1) which isn't very
helpful. What's super weird is that if I make my struct have less than three
ints, or if I remove the iostream business, I get (2) which I believe to be a
much more useful error message.
If I could attach more than one file I'd give you both *.cpp files to
demonstrate, but hopefully this is clear as is.
>From gcc-bugs-return-607676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 05:19:55 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86230] New: missing exception specification
Date: Wed, 20 Jun 2018 05:19:00 -0000
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Bug ID: 86230
Summary: missing exception specification
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The code sample is as follow:
#include <vector>
#include <cassert>
#define VERIFY assert
struct T { int i; };
int swap_calls;
namespace std
{
// Should be most specialized.
#if 1
template<>
#endif
inline void
swap(vector<T, allocator<T> >&, vector<T, allocator<T> >&)
{ ++swap_calls; }
}
void test01()
{
bool test __attribute__((unused)) = true;
std::vector<T> A;
std::vector<T> B;
swap_calls = 0;
std::swap(A, B);
VERIFY(1 == swap_calls); // XXX fails
}
void test02()
{
bool test __attribute__((unused)) = true;
using namespace std;
vector<T> A;
vector<T> B;
swap_calls = 0;
swap(A, B);
VERIFY(1 == swap_calls);
}
int main()
{
test01();
test02();
return 0;
}
g++ accepts the code, but clang++ rejects it with an error message:
error: 'swap<T, std::allocator<T> >' is missing exception specification
'noexcept(noexcept(__x.swap(__y)))'
swap(vector<T, allocator<T> >&, vector<T, allocator<T> >&)
Is this a piece of ill-formed code?
>From gcc-bugs-return-607677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 06:57:30 2018
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Subject: [Bug c++/86184] Shall gcc support this feature?
Date: Wed, 20 Jun 2018 06:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86184
--- Comment #2 from zhonghao at pku dot org.cn ---
(In reply to Jonathan Wakely from comment #1)
> (In reply to zhonghao from comment #0)
> > gcc++ produces errors when compiling the following code:
>
> I don't see any errors. You didn't say which version of GCC you're using or
> what options you're using, as requested by https://gcc.gnu.org/bugs/
I am sorry. I provide a wrong code sample from the clang bug report. The
correct code sample is:
#include <stdio.h>
struct X {
X() { printf("X(): this=%p\n", this); }
X(const X& other) { printf("X(const &X):this=%p, other=%p\n", this, &other); }
~X() { printf("~X(): this=%p\n", this); }
operator bool() { printf("X::operator bool(): this=%p\n", this); return true;
}
};
int main() {
X x = X()? : X();
}
g++ rejects the above code, and the error message is:
error: lvalue required as unary '&' operand
X x = X()? : X();
clang++ accepts the code.
>From gcc-bugs-return-607678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 07:14:50 2018
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Subject: [Bug c++/86183] Scoped enumeration instantiated even if not required
Date: Wed, 20 Jun 2018 07:14:00 -0000
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--- Comment #2 from zhonghao at pku dot org.cn ---
(In reply to Jonathan Wakely from comment #1)
> The definition of a member scoped enumaration type should not be
> instantiated by the implicit instantiation of the class template.
Is the code illegal? The latest clang++ still accepts the code. If the code is
illegal, I will report the problem to clang.
>From gcc-bugs-return-607679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 07:16:25 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86231] New: [8/9 Regression] vrp_meet causes wrong-code
Date: Wed, 20 Jun 2018 07:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86231
Bug ID: 86231
Summary: [8/9 Regression] vrp_meet causes wrong-code
Product: gcc
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#define ONE ((void *) 1)
#define TWO ((void *) 2)
__attribute__((noipa)) int
foo (void *p, int x)
{
if (p == ONE) return 0;
if (!p)
p = x ? TWO : ONE;
return p == ONE ? 0 : 1;
}
int v[8];
int
main ()
{
if (foo ((void *) 0, 0) != 0
|| foo ((void *) 0, 1) != 1
|| foo (ONE, 0) != 0
|| foo (ONE, 1) != 0
|| foo (TWO, 0) != 1
|| foo (TWO, 1) != 1
|| foo (&v[7], 0) != 1
|| foo (&v[7], 1) != 1)
__builtin_abort ();
return 0;
}
is miscompiled starting with r251264, which just triggers a latent bug.
The bug is in:
Meeting
[1B, 2B]
and
~[0B, 1B] EQUIVALENCES: { p_4(D) p_8 } (2 elements)
to
~[0B, -1B]
Found new range for p_2: ~[0B, -1B]
which obviously isn't a correct range, the result of vrp_meet [1B, 2B] and
~[0B, 1B] should be ~[0B, 0B].
--- gcc/tree-vrp.c.jj 2018-05-31 20:53:31.200438223 +0200
+++ gcc/tree-vrp.c 2018-06-20 08:52:16.218963382 +0200
@@ -5922,9 +5922,9 @@ union_ranges (enum value_range_type *vr0
if (TREE_CODE (*vr0min) == INTEGER_CST)
{
*vr0type = vr1type;
- *vr0min = vr1min;
*vr0max = int_const_binop (MINUS_EXPR, *vr0min,
build_int_cst (TREE_TYPE (*vr0min),
1));
+ *vr0min = vr1min;
}
else
goto give_up;
fixes this.
>From gcc-bugs-return-607680-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 07:19:16 2018
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Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
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--- Comment #11 from Christian Franke <franke at computer dot org> ---
(In reply to Jonathan Wakely from comment #8)
> You still haven't explained why declaring the specialization is bogus. The
> explicit specialization is defined at
> https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=libstdc%2B%2B-v3/src/c%2B%2B98/
> istream-string.cc;h=feb3569c8be48539af52b66d6462c455dfd09a47;hb=HEAD#l120
I missed that. Forget the patch. Sorry for the noise.
>From gcc-bugs-return-607681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 07:19:31 2018
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Subject: [Bug tree-optimization/86231] [8/9 Regression] vrp_meet causes wrong-code
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-607682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 07:38:11 2018
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Subject: [Bug tree-optimization/86203] duplicate non-constant call to strlen() not folded
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #4)
> You're right, a strict reading of the standard does imply that the pointer
> argument to strlen could point to the integer. I keep forgetting about this
> unfortunate loophole. Ironically, the equivalent code using snprintf could
> be optimized because the argument to %s "shall be a pointer to the initial
> element
> of an array of character type." I.e., it cannot point to an int object:
>
> int n;
>
> int f (char *s)
> {
> n = __builtin_snprintf (0, 0, "%s", s);
> return __builtin_snprintf (0, 0, "%s", s); // could be replaced by
> return n;
> }
I would guess it could be folded all the way to return 0?
>From gcc-bugs-return-607683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 07:52:50 2018
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Subject: [Bug tree-optimization/86231] [8/9 Regression] vrp_meet causes wrong-code
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44299
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44299&action=edit
gcc9-pr86231.patch
Full untested patch.
>From gcc-bugs-return-607685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 08:44:22 2018
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Subject: [Bug middle-end/86166] ICE in convert_move, at expr.c:299 on aarch64-linux-gnu
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
#1 0x000000000095260a in convert_move (to=0x7ffff6a60e28,
from=0x7ffff6a60c18, unsignedp=1)
at /space/rguenther/src/svn/gcc-6-branch/gcc/expr.c:299
299 gcc_assert (GET_MODE_BITSIZE (from_mode) == GET_MODE_BITSIZE
(to_mode));
(gdb) p debug_rtx (to)
(reg:HI 79)
$1 = void
(gdb) p debug_rtx (from)
(reg:V4HI 73 [ b.0_2 ])
$2 = void
...
#7 0x0000000000baaf12 in expand_unop (mode=HImode, unoptab=bswap_optab,
op0=0x7ffff6a60c18, target=0x0, unsignedp=1)
at /space/rguenther/src/svn/gcc-6-branch/gcc/optabs.c:2705
2705 temp = expand_unop_direct (mode, unoptab, op0, target, unsignedp);
(gdb) p op0
$3 = (rtx) 0x7ffff6a60c18
(gdb) p debug_rtx (op0)
(reg:V4HI 73 [ b.0_2 ])
$4 = void
so bswap:HI on a V4HI operand.
/* Rotation of 16bit values by 8 bits is effectively equivalent to a bswaphi.
Note that this is not the case for bigger values. For instance a rotation
of 0x01020304 by 16 bits gives 0x03040102 which is different from
0x04030201 (bswapsi). */
if (rotate
&& CONST_INT_P (op1)
&& INTVAL (op1) == BITS_PER_UNIT
&& GET_MODE_SIZE (scalar_mode) == 2
&& optab_handler (bswap_optab, HImode) != CODE_FOR_nothing)
return expand_unop (HImode, bswap_optab, shifted, NULL_RTX,
unsignedp);
where trunk passes mode instead of HImode.
PR83623.
*** This bug has been marked as a duplicate of bug 83623 ***
>From gcc-bugs-return-607684-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 08:44:22 2018
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Subject: [Bug middle-end/83623] [8 Regression] ICE: in convert_move, at expr.c:248 with -march=knl and 16bit vector bswap/rotate
Date: Wed, 20 Jun 2018 08:44:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |doko at debian dot org
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 86166 has been marked as a duplicate of this bug. ***
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Wed, 20 Jun 2018 08:47:00 -0000
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--- Comment #12 from Christian Franke <franke at computer dot org> ---
(In reply to Jonathan Wakely from comment #7)
> OK, so then this is the whack Windows linker model, where every DLL has its
> own address space, and probably the same as PR 81522.
Yes. Likely also affects MinGW libstdc++6.dll.
> Does Cygwin default to _GLIBCXX_USE_CXX11_ABI=0?
Yes.
Possible fix for Cygwin:
- Rebuild cygstdc++6.dll with C++17 enabled
- Disable/Remove '__cplusplus <= 201402L' condition around the extern template
block in this case.
>From gcc-bugs-return-607687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 08:51:46 2018
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Subject: [Bug target/81921] [6 Regression] Fails to always-inline intrinsics with -flto
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
WONTFIX for GCC 6 which doesn't have the required infrastructure.
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Subject: [Bug c++/86082] user-defined literals are not converted to the execution charset
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--- Comment #2 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Created attachment 44300
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44300&action=edit
experimental patch
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Subject: [Bug middle-end/83623] [8 Regression] ICE: in convert_move, at expr.c:248 with -march=knl and 16bit vector bswap/rotate
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
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--- Comment #8 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Seems to need a fix for gcc 6 branch based on PR86166
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Subject: [Bug debug/86194] [8/9 Regression] ICE: SIGSEGV in avoid_constant_pool_reference (simplify-rtx.c:215) with -O -g -mavx512bw
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44301
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44301&action=edit
gcc9-pr86194.patch
Untested fix.
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Subject: [Bug debug/86194] [8/9 Regression] ICE: SIGSEGV in avoid_constant_pool_reference (simplify-rtx.c:215) with -O -g -mavx512bw
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r250397, latent before.
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Subject: [Bug tree-optimization/86232] New: ICE in record_estimate, at tree-ssa-loop-niter.c:3258
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Bug ID: 86232
Summary: ICE in record_estimate, at tree-ssa-loop-niter.c:3258
Product: gcc
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This short creduced snippet
enum { a = 1 } b;
int c() {
int d = a;
for (; d;)
d &= d - 1;
return b;
}
compiled with "gcc-9 -c -W -Wall -O2 test-loop-ICE.c" produces this ICE:
during GIMPLE pass: cddce
test-loop-ICE.c: In function 'c':
test-loop-ICE.c:7:1: internal compiler error: in record_estimate, at
tree-ssa-loop-niter.c:3258
}
^
0x850415 record_estimate
../../gcc/tree-ssa-loop-niter.c:3258
0x11a3ddc estimate_numbers_of_iterations(loop*)
../../gcc/tree-ssa-loop-niter.c:4109
0x11a9dc0 max_loop_iterations(loop*,
generic_wide_int<fixed_wide_int_storage<192> >*)
../../gcc/tree-ssa-loop-niter.c:4181
0x11a9dc0 finite_loop_p(loop*)
../../gcc/tree-ssa-loop-niter.c:2714
0x1171c3d find_obviously_necessary_stmts
../../gcc/tree-ssa-dce.c:420
0x1171c3d perform_tree_ssa_dce
../../gcc/tree-ssa-dce.c:1555
0x1171c3d tree_ssa_cd_dce
../../gcc/tree-ssa-dce.c:1612
0x1171c3d execute
../../gcc/tree-ssa-dce.c:1677
This is a recent regression between r261589 and r261688, still present in
r261783.
The backtrace with the original source looks different, but ends up in the same
place:
during GIMPLE pass: cunrolli
test-loop-ICE-full.cpp: In member function 'void MyClass12::initState()':
test-loop-ICE-full.cpp:246:6: internal compiler error: in record_estimate, at
tree-ssa-loop-niter.c:3258
void MyClass12::initState()
^~~~~~~~~
0x9620d5 record_estimate
../../gcc/tree-ssa-loop-niter.c:3258
0x13b093c estimate_numbers_of_iterations(loop*)
../../gcc/tree-ssa-loop-niter.c:4109
0x13b8502 estimate_numbers_of_iterations(function*)
../../gcc/tree-ssa-loop-niter.c:4329
0x16922f6 tree_unroll_loops_completely
../../gcc/tree-ssa-loop-ivcanon.c:1441
0x139c7ae execute
../../gcc/tree-ssa-loop-ivcanon.c:1668
>From gcc-bugs-return-607693-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 09:23:08 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/86108] [8 Regression] crash during unwinding with -O2
Date: Wed, 20 Jun 2018 09:23:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|needs-bisection |
Summary|[8/9 Regression] crash |[8 Regression] crash during
|during unwinding with -O2 |unwinding with -O2
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Should be fixed on the trunk so far. I'll wait a few days before backporting
to 8.2.
>From gcc-bugs-return-607694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 09:38:50 2018
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Subject: [Bug c++/86227] invalid suffix on floating constant
Date: Wed, 20 Jun 2018 09:38:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Try -pedantic-errors not -pedantic -error
This is a supported extension:
https://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html
>From gcc-bugs-return-607695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 09:41:24 2018
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Subject: [Bug c++/86183] Scoped enumeration instantiated even if not required
Date: Wed, 20 Jun 2018 09:41:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The code is valid. It should not give an error, because the definition of the
scoped enumeration type should be instantiated by the implicit instantiation of
the class template. I changed the status to NEW and set the keyword
rejects-valid, I wouldn't have done that if it was invalid.
>From gcc-bugs-return-607696-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 09:49:03 2018
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Subject: [Bug c++/86210] [6/7/8/9 Regression] Missing -Wnonnull warning for function defined in the same TU
Date: Wed, 20 Jun 2018 09:49:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For C we've started warning for the declared_not_defined function with r243661,
because the warning is done during expansion, if you inline the call, then no
warning is emitted. Perhaps we could also warn during inlining if we inline
and pass integer_zerop to a nonnull argument of the inline function. It
wouldn't warn if something isn't simplified into the constant yet (especially a
problem during early inlining), but perhaps better than nothing.
>From gcc-bugs-return-607697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 10:16:22 2018
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Subject: [Bug tree-optimization/86097] [8/9 Regression] ICE: verify_gimple failed (error: mismatching comparison operand types)
Date: Wed, 20 Jun 2018 10:16:00 -0000
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--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Earliest point of detection:
...
@@ -1570,6 +1570,7 @@ canonicalize_loop_ivs (struct loop *loop, tree *nit, bool
bump_in_latch)
fe->flags = EDGE_TRUE_VALUE;
}
gimple_cond_set_code (stmt, LT_EXPR);
+ gcc_assert (TREE_TYPE (var_before) == TREE_TYPE (*nit));
gimple_cond_set_lhs (stmt, var_before);
gimple_cond_set_rhs (stmt, *nit);
update_stmt (stmt);
...
>From gcc-bugs-return-607698-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 10:20:04 2018
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Subject: [Bug tree-optimization/86097] [8/9 Regression] ICE: verify_gimple failed (error: mismatching comparison operand types)
Date: Wed, 20 Jun 2018 10:20:00 -0000
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--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
Tentative patch:
...
diff --git a/gcc/tree-ssa-loop-manip.c b/gcc/tree-ssa-loop-manip.c
index bf425afd436..555842b8420 100644
--- a/gcc/tree-ssa-loop-manip.c
+++ b/gcc/tree-ssa-loop-manip.c
@@ -1542,7 +1542,7 @@ canonicalize_loop_ivs (struct loop *loop, tree *nit, bool
bump_in_latc
h)
precision = GET_MODE_PRECISION (mode);
type = build_nonstandard_integer_type (precision, unsigned_p);
- if (original_precision != precision)
+ if (original_precision != precision || type != TREE_TYPE (*nit))
{
*nit = fold_convert (type, *nit);
*nit = force_gimple_operand (*nit, &stmts, true, NULL_TREE);
...
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86097] [8/9 Regression] ICE: verify_gimple failed (error: mismatching comparison operand types)
Date: Wed, 20 Jun 2018 10:20:00 -0000
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 20 Jun 2018, vries at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86097
>
> --- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
> Earliest point of detection:
> ...
> @@ -1570,6 +1570,7 @@ canonicalize_loop_ivs (struct loop *loop, tree *nit, bool
> bump_in_latch)
> fe->flags = EDGE_TRUE_VALUE;
> }
> gimple_cond_set_code (stmt, LT_EXPR);
> + gcc_assert (TREE_TYPE (var_before) == TREE_TYPE (*nit));
> gimple_cond_set_lhs (stmt, var_before);
> gimple_cond_set_rhs (stmt, *nit);
> update_stmt (stmt);
> ...
So I wonder why we can assume that *nit has type 'type' (I assume
var_before gets type 'type' via create_iv getting zero and one of that
type). That is, we do
if (original_precision != precision)
{
*nit = fold_convert (type, *nit);
*nit = force_gimple_operand (*nit, &stmts, true, NULL_TREE);
if (stmts)
gsi_insert_seq_on_edge_immediate (loop_preheader_edge (loop),
stmts);
}
but that misses checking for signedness match.
>From gcc-bugs-return-607700-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 10:21:26 2018
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Subject: [Bug tree-optimization/86097] [8/9 Regression] ICE: verify_gimple failed (error: mismatching comparison operand types)
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--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 20 Jun 2018, vries at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86097
>
> --- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
> Tentative patch:
> ...
> diff --git a/gcc/tree-ssa-loop-manip.c b/gcc/tree-ssa-loop-manip.c
> index bf425afd436..555842b8420 100644
> --- a/gcc/tree-ssa-loop-manip.c
> +++ b/gcc/tree-ssa-loop-manip.c
> @@ -1542,7 +1542,7 @@ canonicalize_loop_ivs (struct loop *loop, tree *nit, bool
> bump_in_latc
> h)
> precision = GET_MODE_PRECISION (mode);
> type = build_nonstandard_integer_type (precision, unsigned_p);
>
> - if (original_precision != precision)
> + if (original_precision != precision || type != TREE_TYPE (*nit))
|| TYPE_UNSIGNED (*nit) != unsigned_p
>From gcc-bugs-return-607701-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 10:22:12 2018
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86209] Peephole does not happen because the type of zero/sign extended operands is not the same.
Date: Wed, 20 Jun 2018 10:22:00 -0000
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--- Comment #7 from ktkachov at gcc dot gnu.org ---
The other thing to consider with merging loads is how the result is used.
In your example if you merge the 16-bit loads into a single 32-bit register
load you'll have to add instructions to extract the low and high parts into
separate registers in order to add them together and that can end up be more
expensive overall.
>From gcc-bugs-return-607702-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 10:35:21 2018
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From: "sameerad at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86209] Peephole does not happen because the type of zero/sign extended operands is not the same.
Date: Wed, 20 Jun 2018 10:35:00 -0000
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--- Comment #8 from sameerad at gcc dot gnu.org ---
Currently, we are not planning to restrict load/store merging to specific
cases. Restricted merging of loads and stores is already handled by GIMPLE
store-merging pass.
We are combining loads/stores, and then generating extract instructions with
appropriate sign/zero extensions.
W.r.t codesize, it is definitely expensive, and should be avoided. However, for
performance, we want to experiment.
>From gcc-bugs-return-607703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 10:39:38 2018
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Subject: [Bug c++/86210] [6/7/8/9 Regression] Missing -Wnonnull warning for function defined in the same TU
Date: Wed, 20 Jun 2018 10:39:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-20
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44302
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44302&action=edit
gcc9-pr86210.patch
Untested patch to fix the C++ FE regression (presumably started with delayed
folding).
The enhancement to warn during inlining can be done incrementally (but that one
certainly shouldn't be backported).
>From gcc-bugs-return-607704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 10:52:23 2018
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Subject: [Bug c++/86233] New: A tricky code sample
Date: Wed, 20 Jun 2018 10:52:00 -0000
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Bug ID: 86233
Summary: A tricky code sample
Product: gcc
Version: unknown
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he code is as follow:
#define _GLIBCXX_DEBUG
#include <vector>
struct T { int i; };
int swap_calls;
namespace std
{
template<>
void
vector<T, allocator<T> >::swap(vector<T, allocator<T> >&)
{ ++swap_calls; }
}
// Should use vector specialization for swap.
int main()
{
std::vector<T> A;
std::vector<T> B;
swap_calls = 0;
std::swap(A, B);
return swap_calls;
}
It comes from a gcc bug report:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16021
I tried the latest g++, and it accepts the above code, but clang++ rejects it.
The error message is as follow:
code0.c.cpp:12:28: error: 'swap' is missing exception specification
'noexcept(noexcept(declval<std::__debug::vector<T, std::allocator<T> >::_Base
&>().swap(__x)))'
vector<T, allocator<T> >::swap(vector<T, allocator<T> >&)
^
noexcept(noexcept(declval<std::__debug::vector<T, std::allocator<T> >::_Base
&>().swap(__x)))
/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.0.1/../../../../include/c++/8.0.1/debug/vector:688:7:
note: previous declaration is here
swap(vector& __x)
^
1 error generated.
I reported the difference as a bug to clang:
https://bugs.llvm.org/show_bug.cgi?id=37852
Richard Smith believe that clang++ is correct. So, shall g++ reject the code?
>From gcc-bugs-return-607705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 10:56:47 2018
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Subject: [Bug c++/86234] New: non-type template argument is not a constant expression
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Summary: non-type template argument is not a constant
expression
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The code is as follow:
template <class T> struct B;
template <bool b>
struct C { };
template <class T>
struct A: C<B<A<T>>::value>
{
typedef T Type;
};
template<class T>
struct B
{
template<typename X> static int check(typename X::Type*);
template<typename> static char check(...);
static const bool value = (sizeof(check<T>(0)) == sizeof(int));
};
int main()
{
return B<A<int>>::value;
}
clang++ rejects the code with error messages:
error: non-type template argument is not a constant expression
struct A: C<B<A<T>>::value>
The code sample comes from a gcc bug report:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62255
A previous version of g++ also rejects the code, but it is fixed. g++ accepts
the code.
I reported the difference as a bug to clang:
https://bugs.llvm.org/show_bug.cgi?id=37863
However, my reported bug was determined as an invalid bug. Shall g++ reject the
code as clang++ did?
>From gcc-bugs-return-607709-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:10:10 2018
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Subject: [Bug tree-optimization/82402] [6 Regression] error: SSA_NAME_OCCURS_IN_ABNORMAL_PHI should be set
Date: Wed, 20 Jun 2018 11:10:00 -0000
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jun 20 11:09:28 2018
New Revision: 261799
URL: https://gcc.gnu.org/viewcvs?rev=261799&root=gcc&view=rev
Log:
2018-06-20 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-01-01 Jakub Jelinek <jakub@redhat.com>
PR middle-end/83623
* expmed.c (expand_shift_1): For 2-byte rotates by BITS_PER_UNIT,
check for bswap in mode rather than HImode and use that in expand_unop
too.
* gcc.dg/pr83623.c: New test.
2017-09-26 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-09-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/82264
* tree-ssa-sccvn.c (vn_phi_eq): Use safe_dyn_cast to check
for GIMPLE_CONDs.
(vn_phi_lookup): Likewise.
(vn_phi_insert): Likewise.
* is-a.h (safe_dyn_cast): New.
* gcc.dg/torture/pr82264.c: New testcase.
2017-09-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/82285
* tree-vect-patterns.c (vect_recog_bool_pattern): Also handle
enumeral types.
* gcc.dg/torture/pr82285.c: New testcase.
2017-11-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82402
* tree-vect-loop-manip.c (create_lcssa_for_virtual_phi): Properly
set SSA_NAME_OCCURS_IN_ABNORMAL_PHI.
* gcc.dg/torture/pr82402.c: New testcase.
2017-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82697
* tree-ssa-phiopt.c (cond_store_replacement): Use alias-set
zero for conditional load and unconditional store.
* gcc.dg/torture/pr82697.c: New testcase.
2017-11-02 Richard Biener <rguenther@suse.de>
PR middle-end/82765
* varasm.c (decode_addr_const): Make offset HOST_WIDE_INT.
Truncate ARRAY_REF index and element size.
* gcc.dg/pr82765.c: New testcase.
2018-01-08 Richard Biener <rguenther@suse.de>
PR middle-end/83713
* convert.c (do_narrow): Properly guard TYPE_OVERFLOW_WRAPS checks.
* g++.dg/torture/pr83713.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr83713.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr82765.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr83623.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82264.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82285.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82402.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82697.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/convert.c
branches/gcc-6-branch/gcc/expmed.c
branches/gcc-6-branch/gcc/is-a.h
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-alias.c
branches/gcc-6-branch/gcc/tree-ssa-phiopt.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
branches/gcc-6-branch/gcc/tree-vect-loop-manip.c
branches/gcc-6-branch/gcc/tree-vect-patterns.c
branches/gcc-6-branch/gcc/varasm.c
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Subject: [Bug c++/83713] [6 Regression] ICE in do_narrow at gcc/convert.c:474
Date: Wed, 20 Jun 2018 11:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83713
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jun 20 11:09:28 2018
New Revision: 261799
URL: https://gcc.gnu.org/viewcvs?rev=261799&root=gcc&view=rev
Log:
2018-06-20 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-01-01 Jakub Jelinek <jakub@redhat.com>
PR middle-end/83623
* expmed.c (expand_shift_1): For 2-byte rotates by BITS_PER_UNIT,
check for bswap in mode rather than HImode and use that in expand_unop
too.
* gcc.dg/pr83623.c: New test.
2017-09-26 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-09-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/82264
* tree-ssa-sccvn.c (vn_phi_eq): Use safe_dyn_cast to check
for GIMPLE_CONDs.
(vn_phi_lookup): Likewise.
(vn_phi_insert): Likewise.
* is-a.h (safe_dyn_cast): New.
* gcc.dg/torture/pr82264.c: New testcase.
2017-09-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/82285
* tree-vect-patterns.c (vect_recog_bool_pattern): Also handle
enumeral types.
* gcc.dg/torture/pr82285.c: New testcase.
2017-11-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82402
* tree-vect-loop-manip.c (create_lcssa_for_virtual_phi): Properly
set SSA_NAME_OCCURS_IN_ABNORMAL_PHI.
* gcc.dg/torture/pr82402.c: New testcase.
2017-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82697
* tree-ssa-phiopt.c (cond_store_replacement): Use alias-set
zero for conditional load and unconditional store.
* gcc.dg/torture/pr82697.c: New testcase.
2017-11-02 Richard Biener <rguenther@suse.de>
PR middle-end/82765
* varasm.c (decode_addr_const): Make offset HOST_WIDE_INT.
Truncate ARRAY_REF index and element size.
* gcc.dg/pr82765.c: New testcase.
2018-01-08 Richard Biener <rguenther@suse.de>
PR middle-end/83713
* convert.c (do_narrow): Properly guard TYPE_OVERFLOW_WRAPS checks.
* g++.dg/torture/pr83713.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr83713.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr82765.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr83623.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82264.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82285.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82402.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82697.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/convert.c
branches/gcc-6-branch/gcc/expmed.c
branches/gcc-6-branch/gcc/is-a.h
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-alias.c
branches/gcc-6-branch/gcc/tree-ssa-phiopt.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
branches/gcc-6-branch/gcc/tree-vect-loop-manip.c
branches/gcc-6-branch/gcc/tree-vect-patterns.c
branches/gcc-6-branch/gcc/varasm.c
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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/82697] [6 Regression] Wrong optimization with aliasing and "if"
Date: Wed, 20 Jun 2018 11:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82697
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jun 20 11:09:28 2018
New Revision: 261799
URL: https://gcc.gnu.org/viewcvs?rev=261799&root=gcc&view=rev
Log:
2018-06-20 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-01-01 Jakub Jelinek <jakub@redhat.com>
PR middle-end/83623
* expmed.c (expand_shift_1): For 2-byte rotates by BITS_PER_UNIT,
check for bswap in mode rather than HImode and use that in expand_unop
too.
* gcc.dg/pr83623.c: New test.
2017-09-26 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-09-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/82264
* tree-ssa-sccvn.c (vn_phi_eq): Use safe_dyn_cast to check
for GIMPLE_CONDs.
(vn_phi_lookup): Likewise.
(vn_phi_insert): Likewise.
* is-a.h (safe_dyn_cast): New.
* gcc.dg/torture/pr82264.c: New testcase.
2017-09-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/82285
* tree-vect-patterns.c (vect_recog_bool_pattern): Also handle
enumeral types.
* gcc.dg/torture/pr82285.c: New testcase.
2017-11-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82402
* tree-vect-loop-manip.c (create_lcssa_for_virtual_phi): Properly
set SSA_NAME_OCCURS_IN_ABNORMAL_PHI.
* gcc.dg/torture/pr82402.c: New testcase.
2017-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82697
* tree-ssa-phiopt.c (cond_store_replacement): Use alias-set
zero for conditional load and unconditional store.
* gcc.dg/torture/pr82697.c: New testcase.
2017-11-02 Richard Biener <rguenther@suse.de>
PR middle-end/82765
* varasm.c (decode_addr_const): Make offset HOST_WIDE_INT.
Truncate ARRAY_REF index and element size.
* gcc.dg/pr82765.c: New testcase.
2018-01-08 Richard Biener <rguenther@suse.de>
PR middle-end/83713
* convert.c (do_narrow): Properly guard TYPE_OVERFLOW_WRAPS checks.
* g++.dg/torture/pr83713.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr83713.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr82765.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr83623.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82264.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82285.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82402.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82697.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/convert.c
branches/gcc-6-branch/gcc/expmed.c
branches/gcc-6-branch/gcc/is-a.h
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-alias.c
branches/gcc-6-branch/gcc/tree-ssa-phiopt.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
branches/gcc-6-branch/gcc/tree-vect-loop-manip.c
branches/gcc-6-branch/gcc/tree-vect-patterns.c
branches/gcc-6-branch/gcc/varasm.c
>From gcc-bugs-return-607713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:10:23 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/82264] [6 Regression] ICE in vn_phi_lookup at gcc/tree-ssa-sccvn.c:3125
Date: Wed, 20 Jun 2018 11:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82264
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82285] [6 Regression] Optimizing error when using enumeration
Date: Wed, 20 Jun 2018 11:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82285
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jun 20 11:09:28 2018
New Revision: 261799
URL: https://gcc.gnu.org/viewcvs?rev=261799&root=gcc&view=rev
Log:
2018-06-20 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-01-01 Jakub Jelinek <jakub@redhat.com>
PR middle-end/83623
* expmed.c (expand_shift_1): For 2-byte rotates by BITS_PER_UNIT,
check for bswap in mode rather than HImode and use that in expand_unop
too.
* gcc.dg/pr83623.c: New test.
2017-09-26 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-09-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/82264
* tree-ssa-sccvn.c (vn_phi_eq): Use safe_dyn_cast to check
for GIMPLE_CONDs.
(vn_phi_lookup): Likewise.
(vn_phi_insert): Likewise.
* is-a.h (safe_dyn_cast): New.
* gcc.dg/torture/pr82264.c: New testcase.
2017-09-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/82285
* tree-vect-patterns.c (vect_recog_bool_pattern): Also handle
enumeral types.
* gcc.dg/torture/pr82285.c: New testcase.
2017-11-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82402
* tree-vect-loop-manip.c (create_lcssa_for_virtual_phi): Properly
set SSA_NAME_OCCURS_IN_ABNORMAL_PHI.
* gcc.dg/torture/pr82402.c: New testcase.
2017-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82697
* tree-ssa-phiopt.c (cond_store_replacement): Use alias-set
zero for conditional load and unconditional store.
* gcc.dg/torture/pr82697.c: New testcase.
2017-11-02 Richard Biener <rguenther@suse.de>
PR middle-end/82765
* varasm.c (decode_addr_const): Make offset HOST_WIDE_INT.
Truncate ARRAY_REF index and element size.
* gcc.dg/pr82765.c: New testcase.
2018-01-08 Richard Biener <rguenther@suse.de>
PR middle-end/83713
* convert.c (do_narrow): Properly guard TYPE_OVERFLOW_WRAPS checks.
* g++.dg/torture/pr83713.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr83713.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr82765.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr83623.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82264.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82285.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82402.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82697.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/convert.c
branches/gcc-6-branch/gcc/expmed.c
branches/gcc-6-branch/gcc/is-a.h
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-alias.c
branches/gcc-6-branch/gcc/tree-ssa-phiopt.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
branches/gcc-6-branch/gcc/tree-vect-loop-manip.c
branches/gcc-6-branch/gcc/tree-vect-patterns.c
branches/gcc-6-branch/gcc/varasm.c
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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/82264] [6 Regression] ICE in vn_phi_lookup at gcc/tree-ssa-sccvn.c:3125
Date: Wed, 20 Jun 2018 11:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82264
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jun 20 11:09:28 2018
New Revision: 261799
URL: https://gcc.gnu.org/viewcvs?rev=261799&root=gcc&view=rev
Log:
2018-06-20 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-01-01 Jakub Jelinek <jakub@redhat.com>
PR middle-end/83623
* expmed.c (expand_shift_1): For 2-byte rotates by BITS_PER_UNIT,
check for bswap in mode rather than HImode and use that in expand_unop
too.
* gcc.dg/pr83623.c: New test.
2017-09-26 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-09-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/82264
* tree-ssa-sccvn.c (vn_phi_eq): Use safe_dyn_cast to check
for GIMPLE_CONDs.
(vn_phi_lookup): Likewise.
(vn_phi_insert): Likewise.
* is-a.h (safe_dyn_cast): New.
* gcc.dg/torture/pr82264.c: New testcase.
2017-09-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/82285
* tree-vect-patterns.c (vect_recog_bool_pattern): Also handle
enumeral types.
* gcc.dg/torture/pr82285.c: New testcase.
2017-11-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82402
* tree-vect-loop-manip.c (create_lcssa_for_virtual_phi): Properly
set SSA_NAME_OCCURS_IN_ABNORMAL_PHI.
* gcc.dg/torture/pr82402.c: New testcase.
2017-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82697
* tree-ssa-phiopt.c (cond_store_replacement): Use alias-set
zero for conditional load and unconditional store.
* gcc.dg/torture/pr82697.c: New testcase.
2017-11-02 Richard Biener <rguenther@suse.de>
PR middle-end/82765
* varasm.c (decode_addr_const): Make offset HOST_WIDE_INT.
Truncate ARRAY_REF index and element size.
* gcc.dg/pr82765.c: New testcase.
2018-01-08 Richard Biener <rguenther@suse.de>
PR middle-end/83713
* convert.c (do_narrow): Properly guard TYPE_OVERFLOW_WRAPS checks.
* g++.dg/torture/pr83713.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr83713.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr82765.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr83623.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82264.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82285.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82402.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82697.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/convert.c
branches/gcc-6-branch/gcc/expmed.c
branches/gcc-6-branch/gcc/is-a.h
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-alias.c
branches/gcc-6-branch/gcc/tree-ssa-phiopt.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
branches/gcc-6-branch/gcc/tree-vect-loop-manip.c
branches/gcc-6-branch/gcc/tree-vect-patterns.c
branches/gcc-6-branch/gcc/varasm.c
>From gcc-bugs-return-607712-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:10:12 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82765] [6 Regression] ICE at -Os on valid code on x86_64-linux-gnu: in tree_to_shwi, at tree.c:6611
Date: Wed, 20 Jun 2018 11:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82765
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jun 20 11:09:28 2018
New Revision: 261799
URL: https://gcc.gnu.org/viewcvs?rev=261799&root=gcc&view=rev
Log:
2018-06-20 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-01-01 Jakub Jelinek <jakub@redhat.com>
PR middle-end/83623
* expmed.c (expand_shift_1): For 2-byte rotates by BITS_PER_UNIT,
check for bswap in mode rather than HImode and use that in expand_unop
too.
* gcc.dg/pr83623.c: New test.
2017-09-26 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-09-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/82264
* tree-ssa-sccvn.c (vn_phi_eq): Use safe_dyn_cast to check
for GIMPLE_CONDs.
(vn_phi_lookup): Likewise.
(vn_phi_insert): Likewise.
* is-a.h (safe_dyn_cast): New.
* gcc.dg/torture/pr82264.c: New testcase.
2017-09-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/82285
* tree-vect-patterns.c (vect_recog_bool_pattern): Also handle
enumeral types.
* gcc.dg/torture/pr82285.c: New testcase.
2017-11-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82402
* tree-vect-loop-manip.c (create_lcssa_for_virtual_phi): Properly
set SSA_NAME_OCCURS_IN_ABNORMAL_PHI.
* gcc.dg/torture/pr82402.c: New testcase.
2017-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82697
* tree-ssa-phiopt.c (cond_store_replacement): Use alias-set
zero for conditional load and unconditional store.
* gcc.dg/torture/pr82697.c: New testcase.
2017-11-02 Richard Biener <rguenther@suse.de>
PR middle-end/82765
* varasm.c (decode_addr_const): Make offset HOST_WIDE_INT.
Truncate ARRAY_REF index and element size.
* gcc.dg/pr82765.c: New testcase.
2018-01-08 Richard Biener <rguenther@suse.de>
PR middle-end/83713
* convert.c (do_narrow): Properly guard TYPE_OVERFLOW_WRAPS checks.
* g++.dg/torture/pr83713.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr83713.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr82765.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr83623.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82264.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82285.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82402.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82697.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/convert.c
branches/gcc-6-branch/gcc/expmed.c
branches/gcc-6-branch/gcc/is-a.h
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-alias.c
branches/gcc-6-branch/gcc/tree-ssa-phiopt.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
branches/gcc-6-branch/gcc/tree-vect-loop-manip.c
branches/gcc-6-branch/gcc/tree-vect-patterns.c
branches/gcc-6-branch/gcc/varasm.c
>From gcc-bugs-return-607707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:10:07 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/83623] [8 Regression] ICE: in convert_move, at expr.c:248 with -march=knl and 16bit vector bswap/rotate
Date: Wed, 20 Jun 2018 11:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83623
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jun 20 11:09:28 2018
New Revision: 261799
URL: https://gcc.gnu.org/viewcvs?rev=261799&root=gcc&view=rev
Log:
2018-06-20 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-01-01 Jakub Jelinek <jakub@redhat.com>
PR middle-end/83623
* expmed.c (expand_shift_1): For 2-byte rotates by BITS_PER_UNIT,
check for bswap in mode rather than HImode and use that in expand_unop
too.
* gcc.dg/pr83623.c: New test.
2017-09-26 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-09-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/82264
* tree-ssa-sccvn.c (vn_phi_eq): Use safe_dyn_cast to check
for GIMPLE_CONDs.
(vn_phi_lookup): Likewise.
(vn_phi_insert): Likewise.
* is-a.h (safe_dyn_cast): New.
* gcc.dg/torture/pr82264.c: New testcase.
2017-09-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/82285
* tree-vect-patterns.c (vect_recog_bool_pattern): Also handle
enumeral types.
* gcc.dg/torture/pr82285.c: New testcase.
2017-11-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82402
* tree-vect-loop-manip.c (create_lcssa_for_virtual_phi): Properly
set SSA_NAME_OCCURS_IN_ABNORMAL_PHI.
* gcc.dg/torture/pr82402.c: New testcase.
2017-10-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/82697
* tree-ssa-phiopt.c (cond_store_replacement): Use alias-set
zero for conditional load and unconditional store.
* gcc.dg/torture/pr82697.c: New testcase.
2017-11-02 Richard Biener <rguenther@suse.de>
PR middle-end/82765
* varasm.c (decode_addr_const): Make offset HOST_WIDE_INT.
Truncate ARRAY_REF index and element size.
* gcc.dg/pr82765.c: New testcase.
2018-01-08 Richard Biener <rguenther@suse.de>
PR middle-end/83713
* convert.c (do_narrow): Properly guard TYPE_OVERFLOW_WRAPS checks.
* g++.dg/torture/pr83713.C: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr83713.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr82765.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr83623.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82264.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82285.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82402.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr82697.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/convert.c
branches/gcc-6-branch/gcc/expmed.c
branches/gcc-6-branch/gcc/is-a.h
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-alias.c
branches/gcc-6-branch/gcc/tree-ssa-phiopt.c
branches/gcc-6-branch/gcc/tree-ssa-sccvn.c
branches/gcc-6-branch/gcc/tree-vect-loop-manip.c
branches/gcc-6-branch/gcc/tree-vect-patterns.c
branches/gcc-6-branch/gcc/varasm.c
>From gcc-bugs-return-607715-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:11:07 2018
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Subject: [Bug tree-optimization/82402] [6 Regression] error: SSA_NAME_OCCURS_IN_ABNORMAL_PHI should be set
Date: Wed, 20 Jun 2018 11:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
Known to fail| |6.4.0
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:11:56 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 c/82765] [6 Regression] ICE at -Os on valid code on x86_64-linux-gnu: in tree_to_shwi, at tree.c:6611
Date: Wed, 20 Jun 2018 11:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
Known to fail| |6.4.0
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:11:34 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82697] [6 Regression] Wrong optimization with aliasing and "if"
Date: Wed, 20 Jun 2018 11:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
Known to fail| |6.4.0
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:11:02 2018
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Subject: [Bug tree-optimization/82285] [6 Regression] Optimizing error when using enumeration
Date: Wed, 20 Jun 2018 11:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
Known to fail| |6.4.0
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:12:21 2018
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Subject: [Bug c++/83713] [6 Regression] ICE in do_narrow at gcc/convert.c:474
Date: Wed, 20 Jun 2018 11:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83713
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607719-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:16:25 2018
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Subject: [Bug c++/86235] New: g++ accept an erroneous code sample
Date: Wed, 20 Jun 2018 11:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86235
Bug ID: 86235
Summary: g++ accept an erroneous code sample
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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The code sample is as follow:
template< int mydim, typename Traits >
class BasicGeometry
{
typedef int some_type_t;
};
template<class ctype, int mydim, int coorddim>
class MockGeometry : BasicGeometry<mydim, int>{
using typename BasicGeometry<mydim, int>::operator[]; // expected-error
{{typename is allowed for identifiers only}}
};
int main() {
return 0;
}
g++ accepts it, but clang++ rejects it. I thought that this is a clang bug, so
I reported it to https://bugs.llvm.org/show_bug.cgi?id=37719
After reading my report, David Blaikie and Richard Smith agree that this is a
gcc bug. Shall gcc repair the problem?
>From gcc-bugs-return-607720-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:17:01 2018
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Subject: [Bug target/86236] New: -mstackrealign prologue clobbers %edi for fastcall functions with global register variable
Date: Wed, 20 Jun 2018 11:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86236
Bug ID: 86236
Summary: -mstackrealign prologue clobbers %edi for fastcall
functions with global register variable
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
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#include <xmmintrin.h>
void f1 (void *, int);
register int edi __asm__ ("edi");
__attribute__ ((fastcall))
void
f2 (void)
{
// Force stack alignment.
__m128i m;
f1 (&m, edi);
}
Compile with “-m32 -O2 -march=x86-64 -msse2 -mfpmath=sse -mstackrealignâ€:
.globl f2
.type f2, @function
f2:
.LFB504:
.cfi_startproc
leal 4(%esp), %edi
.cfi_def_cfa 7, 0
andl $-16, %esp
pushl -4(%edi)
pushl %ebp
.cfi_escape 0x10,0x5,0x2,0x75,0
movl %esp, %ebp
pushl %edi
.cfi_escape 0xf,0x3,0x75,0x7c,0x6
leal -24(%ebp), %eax
subl $28, %esp
pushl %edi
pushl %eax
call f1
movl -4(%ebp), %edi
.cfi_def_cfa 7, 0
addl $16, %esp
leave
.cfi_restore 5
leal -4(%edi), %esp
.cfi_def_cfa 4, 4
ret
.cfi_endproc
The value of %edi is clobbered before it is saved on the stack. I think %edi
is callee-saved even for fastcall functions, so this is wrong on multiple
levels.
>From gcc-bugs-return-607721-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:22:36 2018
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Subject: [Bug c++/86237] New: Narrowing from int to bool is not allowed in a non type template argument
Date: Wed, 20 Jun 2018 11:22:00 -0000
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Bug ID: 86237
Summary: Narrowing from int to bool is not allowed in a non
type template argument
Product: gcc
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The code sample is as follow:
enum { E = 2 };
template <bool> void f(int) {}
template <int> void f() {}
int
main ()
{
f<1 * 1>();
f<1 << 1>();
f<1 ? 3 : 2>();
f<E>();
f<1 * 1>(0);
f<1 << 1>(0);
f<1 ? 3 : 2>(0);
f<E>(0);
}
clang++ rejects it with error messages:
error: no matching function for call to 'f'
f<1 << 1>(0);
error: no matching function for call to 'f'
f<1 ? 3 : 2>(0);
The code comes from the test suite of gcc
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79184)
I tried g++ -std=c++11, but it still accepts the code.
I thought that this is a bug in clang, and reported it to
https://bugs.llvm.org/show_bug.cgi?id=37866
Richard Smith believe that this is a gcc bug. Shall gcc repair the problem?
>From gcc-bugs-return-607722-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:29:29 2018
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Subject: [Bug c++/86238] New: a vtable layout bug
Date: Wed, 20 Jun 2018 11:29:00 -0000
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Bug ID: 86238
Summary: a vtable layout bug
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Created attachment 44303
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44303&action=edit
testcase
The code sample is attached.
clang++ produces many errors when compiling the attached code, but g++ does not
produce any errors.
I thought that this is clang bug, so I reported it to
https://bugs.llvm.org/show_bug.cgi?id=37720.
Richard Smith said that the errors of clang are correct. So, is this a bug in
g++?
>From gcc-bugs-return-607723-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:29:55 2018
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Subject: [Bug target/86236] Stack alignment prologue clobbers %edi for fastcall functions with global register variable
Date: Wed, 20 Jun 2018 11:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86236
Florian Weimer <fw at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|-mstackrealign prologue |Stack alignment prologue
|clobbers %edi for fastcall |clobbers %edi for fastcall
|functions with global |functions with global
|register variable |register variable
--- Comment #1 from Florian Weimer <fw at gcc dot gnu.org> ---
Jakub observed that any stack realignment triggers this, e.g. this uses %edi
even without -mstackrealign:
void f1 (void *, int);
register int edi __asm__ ("edi");
__attribute__ ((fastcall))
void
f2 (void)
{
// Force stack alignment.
char buf[256] __attribute__ ((aligned (256)));
f1 (buf, edi);
}
And -ffixed-edi does not make a difference.
>From gcc-bugs-return-607724-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:38:00 2018
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Subject: [Bug target/86236] -mstackrealign prologue clobbers %edi for fastcall functions with global register variable
Date: Wed, 20 Jun 2018 11:38:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com,
| |jakub at gcc dot gnu.org,
| |law at gcc dot gnu.org,
| |uros at gcc dot gnu.org
Summary|Stack alignment prologue |-mstackrealign prologue
|clobbers %edi for fastcall |clobbers %edi for fastcall
|functions with global |functions with global
|register variable |register variable
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
/* Find an available register to be used as dynamic realign argument
pointer regsiter. Such a register will be written in prologue and
used in begin of body, so it must not be
1. parameter passing register.
2. GOT pointer.
We reuse static-chain register if it is available. Otherwise, we
use DI for i386 and R13 for x86-64. We chose R13 since it has
shorter encoding.
Return: the regno of chosen register. */
static unsigned int
find_drap_reg (void)
...
Nothing checks if those chosen registers aren't fixed_regs (it doesn't work
even with -ffixed-edi), nor if they are global registers. Similarly for the
static chain (though, that one is part of the ABI, so if we can't use it we
need to error out).
>From gcc-bugs-return-607725-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 11:40:35 2018
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Subject: [Bug target/86236] Stack alignment prologue clobbers %edi for fastcall functions with global register variable
Date: Wed, 20 Jun 2018 11:40:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Though, obviously with -m32 we are getting -><- this close to getting rid out
of all usable registers with fastcall, static chain and drap, especially if
also -fpic.
>From gcc-bugs-return-607726-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 12:11:40 2018
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From: "pattakosn at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86239] New: Suggestion: Improve "set but not used variable" warning
Date: Wed, 20 Jun 2018 12:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86239
Bug ID: 86239
Summary: Suggestion: Improve "set but not used variable"
warning
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: pattakosn at yahoo dot com
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Created attachment 44304
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44304&action=edit
compiled with gcc -Wall -Wextra -pedantic
Hi,
I am not sure if I am right on this, but I noticed that having code like this:
useless = 0;
useless = useless;
silences the set but not used variable warning (assume that useless is a local
variable and is not used anywhere else). Now, I would agree that the second
line is useless and a terrible thing to do, but still, wouldn't it better if
the compiler still complained about the set but not used variable (perhaps
about the useless command as well, but I do not know if it would be easy to
classify identity/"useless" commands.
I attach a very small file that I used to test the compiler warnings.
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86173] Default construction of a union (in std::optional)
Date: Wed, 20 Jun 2018 12:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86173
--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
Recent related commits: r261758 r261735 (they don't fix the issue).
>From gcc-bugs-return-607728-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 13:07:49 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++/86228] ordered comparison between pointer and zero
Date: Wed, 20 Jun 2018 13:07:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2018-06-20
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The standard says:
The usual arithmetic conversions (8.3) are performed on operands of arithmetic
or enumeration type. If both operands are pointers, pointer conversions (7.11)
and qualification conversions (7.5) are performed to bring them to their
composite pointer type (8.2). After conversions, the operands shall have the
same type.
Although 0 is a null pointer constant, its type is 'int' not a pointer type, so
I think Clang is right, and this should be ill-formed.
>From gcc-bugs-return-607729-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 13:10:46 2018
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Subject: [Bug c/84873] [6 Regression] ICE: verify_ssa failed (error: definition in block 3 does not dominate use in block 4)
Date: Wed, 20 Jun 2018 13:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607730-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 13:11:03 2018
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Subject: [Bug tree-optimization/85597] [6 Regression] internal compiler error: in compute_live_loop_exits, at tree-ssa-loop-manip.c:229
Date: Wed, 20 Jun 2018 13:11:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jun 20 13:10:21 2018
New Revision: 261800
URL: https://gcc.gnu.org/viewcvs?rev=261800&root=gcc&view=rev
Log:
2018-06-20 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-03-16 Richard Biener <rguenther@suse.de>
PR c/84873
* c-gimplify.c (c_gimplify_expr): Revert previous change. Instead
unshare the possibly folded expression.
2018-03-15 Richard Biener <rguenther@suse.de>
PR c/84873
* c-gimplify.c (c_gimplify_expr): Do not fold expressions.
* c-c++-common/pr84873.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/85597
* tree-vect-stmts.c (vectorizable_operation): For ternary SLP
do not use split vect_get_vec_defs call but call vect_get_slp_defs
directly.
* gcc.dg/vect/pr85597.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/c-c++-common/pr84873.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/vect/pr85597.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/c-family/ChangeLog
branches/gcc-6-branch/gcc/c-family/c-gimplify.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-vect-stmts.c
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Subject: [Bug c/84873] [6 Regression] ICE: verify_ssa failed (error: definition in block 3 does not dominate use in block 4)
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jun 20 13:10:21 2018
New Revision: 261800
URL: https://gcc.gnu.org/viewcvs?rev=261800&root=gcc&view=rev
Log:
2018-06-20 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-03-16 Richard Biener <rguenther@suse.de>
PR c/84873
* c-gimplify.c (c_gimplify_expr): Revert previous change. Instead
unshare the possibly folded expression.
2018-03-15 Richard Biener <rguenther@suse.de>
PR c/84873
* c-gimplify.c (c_gimplify_expr): Do not fold expressions.
* c-c++-common/pr84873.c: New testcase.
2018-05-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/85597
* tree-vect-stmts.c (vectorizable_operation): For ternary SLP
do not use split vect_get_vec_defs call but call vect_get_slp_defs
directly.
* gcc.dg/vect/pr85597.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/c-c++-common/pr84873.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/vect/pr85597.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/c-family/ChangeLog
branches/gcc-6-branch/gcc/c-family/c-gimplify.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-vect-stmts.c
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Subject: [Bug tree-optimization/85597] [6 Regression] internal compiler error: in compute_live_loop_exits, at tree-ssa-loop-manip.c:229
Date: Wed, 20 Jun 2018 13:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
Known to fail| |6.4.0
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/78244] Narrowing conversion is accepted in a function template, but it should be rejected
Date: Wed, 20 Jun 2018 13:18:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2016-11-08 00:00:00 |2018-6-20
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=57891
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Closely related to PR 57891 but that relates to narrowing of a non-type
template argument, whereas this is narrowing during substitution so let's keep
it open.
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Subject: [Bug c++/86237] Narrowing from int to bool is not allowed in a non type template argument
Date: Wed, 20 Jun 2018 13:19:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
dup
*** This bug has been marked as a duplicate of bug 57891 ***
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Subject: [Bug c++/57891] No diagnostic of narrowing conversion in non-type template argument
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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CC| |zhonghao at pku dot org.cn
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 86237 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 13:20:24 2018
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Subject: [Bug c++/86230] missing exception specification
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86230
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Isn't this the same as PR 86233 ?
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Subject: [Bug c++/86235] g++ accept an erroneous code sample
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
dup
*** This bug has been marked as a duplicate of bug 65969 ***
>From gcc-bugs-return-607738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 13:25:05 2018
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Subject: [Bug c++/65969] typename allowed in using declaration of non-types names
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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CC| |zhonghao at pku dot org.cn
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 86235 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 13:27:20 2018
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Subject: [Bug c++/86230] missing exception specification
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Looks like a dup of your own bug.
*** This bug has been marked as a duplicate of bug 86233 ***
>From gcc-bugs-return-607739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 13:27:20 2018
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Subject: [Bug middle-end/83623] [8 Regression] ICE: in convert_move, at expr.c:248 with -march=knl and 16bit vector bswap/rotate
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/86233] A tricky code sample
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 86230 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 13:32:57 2018
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Subject: [Bug c++/65969] typename allowed in using declaration of non-types names
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-607743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 13:45:05 2018
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Subject: [Bug c++/86218] [9 Regression] ICE in compare_ics, at cp/call.c:9769
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86218
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Which I guess is Bug 78244.
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Subject: [Bug c++/86240] New: ice: unexpected expression absu_expr
Date: Wed, 20 Jun 2018 13:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86240
Bug ID: 86240
Summary: ice: unexpected expression absu_expr
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Somewhere between revisions 261680 and 261730, this C++ code
causes trouble:
extern "C" int abs(int);
class a {
public:
short b;
};
short c;
void d() {
a e;
abs(c) >= e.b;
}
$ ~/gcc/results.261730/bin/gcc -c -w bug447.cc
bug447.cc: In function ‘void d()’:
bug447.cc:9:15: internal compiler error: unexpected expression ‘#‘absu_expr’
not supported by dump_expr#<expression error>’ of kind absu_expr
abs(c) >= e.b;
^
0x822d5d cxx_eval_constant_expression
../../trunk/gcc/cp/constexpr.c:4815
0x820019 cxx_eval_constant_expression
../../trunk/gcc/cp/constexpr.c:4612
0x820019 cxx_eval_constant_expression
../../trunk/gcc/cp/constexpr.c:4612
>From gcc-bugs-return-607745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 13:53:33 2018
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Subject: [Bug c++/86233] A tricky code sample
Date: Wed, 20 Jun 2018 13:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86233
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-20
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I can't find the relevant standarese but I think the code should be rejected
because the specialization has a weaker exception-specification.
Reduced:
template<typename T> struct X {
void f() noexcept { }
};
template<> void X<int>::f() { }
EDG says:
"es.cc", line 5: error: allowing all exceptions is incompatible with function
"X<T>::f" (declared at line 2)
template<> void X<int>::f() { }
^
1 error detected in the compilation of "es.cc".
Clang says:
es.cc:5:25: error: 'f' is missing exception specification 'noexcept'
template<> void X<int>::f() { }
^
noexcept
es.cc:2:8: note: previous declaration is here
void f() noexcept { }
^
1 error generated.
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Subject: [Bug c++/86240] ice: unexpected expression absu_expr
Date: Wed, 20 Jun 2018 13:53:00 -0000
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David Binderman <dcb314 at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
From svn blame, it looks like Jason may be able to help.
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Subject: [Bug c++/86233] explicit specialization of function template accepted with weaker exception specification
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|A tricky code sample |explicit specialization of
| |function template accepted
| |with weaker exception
| |specification
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced further:
template<typename T> void f() noexcept { }
template<> void f<int>() { }
>From gcc-bugs-return-607748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 14:02:05 2018
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Subject: [Bug c++/86240] ice: unexpected expression absu_expr
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-20
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed. I'll take a look.
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Subject: [Bug c++/86238] a vtable layout bug
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Clang's errors have absolutely nothing to do with a vtable bug (that was a
completely different bug that was demonstrated by the same code).
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Subject: [Bug c++/86240] [9 Regression] ice: unexpected expression absu_expr
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
Summary|ice: unexpected expression |[9 Regression] ice:
|absu_expr |unexpected expression
| |absu_expr
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r261681.
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Subject: [Bug c++/86238] No diagnostic for virtual base class with inaccessible destructor
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
Summary|a vtable layout bug |No diagnostic for virtual
| |base class with
| |inaccessible destructor
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please try to provide meaningful bug titles, and reduce the code to remove
everything that isn't relevant.
This bug reduces from a 72kB testcase to simply:
struct s2 { ~s2() {} };
class s3 : virtual protected s2 { };
class s4 : private s3 { };
class s11 : s4 { } a11;
C++ and EDG accept this, but Clang prints:
test.cc:4:7: error: inherited virtual base class 's2' has private destructor
class s11 : s4 { } a11;
^
test.cc:4:20: note: in implicit default constructor for 's11' first required
here
class s11 : s4 { } a11;
^
test.cc:3:12: note: constrained by private inheritance here
class s4 : private s3 { };
^~~~~~~~~~
test.cc:4:7: error: inherited virtual base class 's2' has private destructor
class s11 : s4 { } a11;
^
test.cc:4:20: note: in implicit destructor for 's11' first required here
class s11 : s4 { } a11;
^
test.cc:3:12: note: constrained by private inheritance here
class s4 : private s3 { };
^~~~~~~~~~
2 errors generated.
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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++/86240] [9 Regression] ice: unexpected expression absu_expr
Date: Wed, 20 Jun 2018 14:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86240
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
>From gcc-bugs-return-607753-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 14:29:07 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86241] New: duplicate strlen-like snprintf calls not folded
Date: Wed, 20 Jun 2018 14:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86241
Bug ID: 86241
Summary: duplicate strlen-like snprintf calls not folded
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
The calls to snprintf in the function below compute the length of the string s
without storing any output. As mentioned in bug 86203 comment #4, the result
of the function with the same arguments (and a null destination) is constant so
the duplicate snprintf call could be replaced by the result of the first,
analogously to how the strlen optimization pass folds the corresponding call to
strlen().
$ cat c.c && gcc -S -O2 -Wall -Wextra -fdump-tree-optimized=/dev/stdout c.c
int f (char *s)
{
int n = __builtin_strlen (s);
int m = __builtin_strlen (s); // folded into m = n;
return m + n;
}
int g (char *s)
{
int n = __builtin_snprintf (0, 0, "%s", s);
int m = __builtin_snprintf (0, 0, "%s", s); // could be folded into m = n
return m + n;
}
;; Function f (f, funcdef_no=0, decl_uid=1956, cgraph_uid=0, symbol_order=0)
f (char * s)
{
int n;
long unsigned int _1;
int _5;
<bb 2> [local count: 1073741825]:
_1 = __builtin_strlen (s_3(D));
n_4 = (int) _1;
_5 = n_4 * 2;
return _5;
}
;; Function g (g, funcdef_no=1, decl_uid=1961, cgraph_uid=1, symbol_order=1)
g (char * s)
{
int m;
int n;
int _7;
<bb 2> [local count: 1073741825]:
n_4 = __builtin_snprintf (0B, 0, "%s", s_2(D));
m_6 = __builtin_snprintf (0B, 0, "%s", s_2(D));
_7 = n_4 + m_6;
return _7;
}
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86203] duplicate non-constant call to strlen() not folded
Date: Wed, 20 Jun 2018 14:29:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=86241
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
snprintf (0, 0, "%s", s) returns the length of s without storing any
characters. I opened bug 86241 to implement that optimization.
>From gcc-bugs-return-607755-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 14:32:03 2018
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From: "cfd@mnet-mail.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86242] New: [F03] ICE for derived type with allocatable class component
Date: Wed, 20 Jun 2018 14:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86242
Bug ID: 86242
Summary: [F03] ICE for derived type with allocatable class
component
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: cfd@mnet-mail.de
Target Milestone: ---
The following Fortran 2003 code (which compiles with flang 6.0,
pgfortran 17.10, and ifort 19.0.0.070 Beta) generates an internal compiler
error (ICE) with gfortran 8.0.1:
$ cat test.F90
module test
implicit none
private
public :: tester
type :: wrapper
integer(4) :: n
end type wrapper
type :: output
real(8) :: dummy
end type output
type :: tester
class(wrapper), allocatable :: wrap
procedure(proc1), pointer :: ptr => null()
end type tester
abstract interface
function proc1(self) result(uc)
import :: tester, output
class(tester), intent(in) :: self
class(output), allocatable :: uc
end function proc1
end interface
end module test
$ gfortran-8 -c test.F90
test.F90:29:0:
end module test
internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-8/README.Bugs> for instructions.
Gfortran version output is:
$ gfortran-8 -v
Using built-in specs.
COLLECT_GCC=gfortran-8
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
8-20180424-0ubuntu1~16.04.1'
--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 --with-as=/usr/bin/x86_64-linux-gnu-as
--with-ld=/usr/bin/x86_64-linux-gnu-ld --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 --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 8.0.1 20180424 (experimental) [trunk revision 259590] (Ubuntu
8-20180424-0ubuntu1~16.04.1)
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85634] [8/9 Regression] ICE in tsubst_copy, at cp/pt.c:15483
Date: Wed, 20 Jun 2018 14:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85634
--- Comment #7 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed trunk r261802
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/85634] [8/9 Regression] ICE in tsubst_copy, at cp/pt.c:15483
Date: Wed, 20 Jun 2018 14:34:00 -0000
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--- Comment #8 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Wed Jun 20 14:34:06 2018
New Revision: 261802
URL: https://gcc.gnu.org/viewcvs?rev=261802&root=gcc&view=rev
Log:
[PR c++/85634] Fix tsubst ICE
https://gcc.gnu.org/ml/gcc-patches/2018-06/msg01237.html
PR c++/85634
* cp-tree.h (lookup_keep): Drop KEEP parm.
(lookup_list_keep): Delete.
(maybe_get_fns): Declare.
* parser.c (cp_parser_primary_expression): Call lookup_keep here.
(cp_parser_template_id): Not here ...
* decl.c (cp_finish_decl): ... nor here ...
* init.c (build_raw_new_expr): ... nor here ...
* pt.c (process_template_parm): ... nor here ...
* semantics.c (perform_koenig_lookup): Call lookup_keep.
(finish_call_expr): Not here.
* tree.c (ovl_cache): Delete.
(ovl_make, ovl_copy): No cache.
(lookup_keep): Always keep.
(lookup_list_keep): Delete.
(maybe_get_fns): New, broken out of ...
(get_fns): ... here. Call it.
(built_min_nt_loc, build_min, build_min_non_dep): Drop lookup_keep.
(build_min_nt_call_vec): Likewise.
PR c++/85634
* g++.dg/lookup/pr85634.C: New.
Added:
trunk/gcc/testsuite/g++.dg/lookup/pr85634.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl.c
trunk/gcc/cp/init.c
trunk/gcc/cp/parser.c
trunk/gcc/cp/pt.c
trunk/gcc/cp/semantics.c
trunk/gcc/cp/tree.c
trunk/gcc/testsuite/ChangeLog
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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++/86184] Conditional expression with omitted operand cannot use rvalue of type convertible to bool
Date: Wed, 20 Jun 2018 14:34:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|WAITING |NEW
Summary|Shall gcc support this |Conditional expression with
|feature? |omitted operand cannot use
| |rvalue of type convertible
| |to bool
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:
struct X {
operator bool() { return true; }
};
X x;
X y = X() ? X() : x;
X z = X() ? : y;
tern.cc:7:15: error: lvalue required as unary ‘&’ operand
X z = X() ? : y;
^
tern.cc:7:7: error: could not convert ‘X()’ from ‘X’ to ‘bool’
X z = X() ? : y;
^~~
The manual says the conditional expression with the omitted operand should
"perfectly equivalent" to the first one.
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Subject: [Bug tree-optimization/86097] [8/9 Regression] ICE: verify_gimple failed (error: mismatching comparison operand types)
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #6 from Tom de Vries <vries at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2018-06/msg01240.html
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Subject: [Bug tree-optimization/86097] [8/9 Regression] ICE: verify_gimple failed (error: mismatching comparison operand types)
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--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Wed Jun 20 14:44:45 2018
New Revision: 261804
URL: https://gcc.gnu.org/viewcvs?rev=261804&root=gcc&view=rev
Log:
Generate correctly typed compare in canonicalize_loop_ivs
2018-06-20 Tom de Vries <tdevries@suse.de>
PR tree-optimization/86097
* tree-ssa-loop-manip.c (canonicalize_loop_ivs): Also convert *nit to
iv type if signedness of iv type is not the same as that of *nit.
* gcc.dg/autopar/pr86097.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/autopar/pr86097.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-loop-manip.c
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Subject: [Bug tree-optimization/86231] [8/9 Regression] vrp_meet causes wrong-code
Date: Wed, 20 Jun 2018 14:48:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jun 20 14:47:28 2018
New Revision: 261805
URL: https://gcc.gnu.org/viewcvs?rev=261805&root=gcc&view=rev
Log:
PR tree-optimization/86231
* tree-vrp.c (union_ranges): For ( [ ) ] or ( )[ ] range and
anti-range don't overwrite *vr0min before using it to compute *vr0max.
* gcc.dg/tree-ssa/vrp119.c: New test.
* gcc.c-torture/execute/pr86231.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr86231.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp119.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c
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Subject: [Bug tree-optimization/86231] [8/9 Regression] vrp_meet causes wrong-code
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jun 20 14:50:09 2018
New Revision: 261806
URL: https://gcc.gnu.org/viewcvs?rev=261806&root=gcc&view=rev
Log:
PR tree-optimization/86231
* tree-vrp.c (union_ranges): For ( [ ) ] or ( )[ ] range and
anti-range don't overwrite *vr0min before using it to compute *vr0max.
* gcc.dg/tree-ssa/vrp119.c: New test.
* gcc.c-torture/execute/pr86231.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.c-torture/execute/pr86231.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/tree-ssa/vrp119.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-vrp.c
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Subject: [Bug debug/86194] [8/9 Regression] ICE: SIGSEGV in avoid_constant_pool_reference (simplify-rtx.c:215) with -O -g -mavx512bw
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jun 20 14:51:04 2018
New Revision: 261807
URL: https://gcc.gnu.org/viewcvs?rev=261807&root=gcc&view=rev
Log:
PR debug/86194
* var-tracking.c (use_narrower_mode_test): Check if shift amount can
be narrowed.
* gcc.target/i386/pr86194.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr86194.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/var-tracking.c
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Subject: [Bug tree-optimization/86231] [6/7 Regression] vrp_meet causes wrong-code
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|8.2 |6.5
Summary|[8/9 Regression] vrp_meet |[6/7 Regression] vrp_meet
|causes wrong-code |causes wrong-code
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 8.2+. The bug exists in 6.x and 7.x too, so keeping open for
backporting consideration.
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Subject: [Bug debug/86194] [8/9 Regression] ICE: SIGSEGV in avoid_constant_pool_reference (simplify-rtx.c:215) with -O -g -mavx512bw
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jun 20 14:57:55 2018
New Revision: 261808
URL: https://gcc.gnu.org/viewcvs?rev=261808&root=gcc&view=rev
Log:
PR debug/86194
* var-tracking.c (use_narrower_mode_test): Check if shift amount can
be narrowed.
* gcc.target/i386/pr86194.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr86194.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/var-tracking.c
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Subject: [Bug tree-optimization/86097] [8/9 Regression] ICE: verify_gimple failed (error: mismatching comparison operand types)
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--- Comment #8 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> This first started to ICE in r254867, with:
That commit is part of gcc-8-branch, and was committed to trunk before the
gcc-8-branch branch point, so that probably means this ICE reproduces as well
for the 8 branch.
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Subject: [Bug tree-optimization/86097] [8 Regression] ICE: verify_gimple failed (error: mismatching comparison operand types)
Date: Wed, 20 Jun 2018 15:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86097
Arseny Solokha <asolokha at gmx dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] ICE: |[8 Regression] ICE:
|verify_gimple failed |verify_gimple failed
|(error: mismatching |(error: mismatching
|comparison operand types) |comparison operand types)
--- Comment #9 from Arseny Solokha <asolokha at gmx dot com> ---
I believe it's fixed on trunk now.
>From gcc-bugs-return-607768-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 15:05:17 2018
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Subject: [Bug tree-optimization/86097] [8 Regression] ICE: verify_gimple failed (error: mismatching comparison operand types)
Date: Wed, 20 Jun 2018 15:05:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Sure, that is why this is an 8/9 regression. Checking needs to be enabled to
reproduce on the 8.x branch.
>From gcc-bugs-return-607769-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 15:11:42 2018
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Subject: [Bug c++/86243] New: unknown attributes causing hard error
Date: Wed, 20 Jun 2018 15:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86243
Bug ID: 86243
Summary: unknown attributes causing hard error
Product: gcc
Version: 7.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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The following code (based on
http://open-std.org/JTC1/SC22/WG21/docs/papers/2017/p0479r1.html)
int main()
{
if (1 == 2) [[unlikely]]
throw int{};
return 2;
}
produces an error:
% g++7 -std=c++17 test.cpp
test.cpp: In function 'int main()':
test.cpp:3:18: error: expected identifier before '[' token
if (1 == 2) [[unlikely]]
^
test.cpp: In lambda function:
test.cpp:4:9: error: expected '{' before 'throw'
throw int{};
^~~~~
test.cpp: In function 'int main()':
test.cpp:4:9: error: expected ';' before 'throw'
This strongly looks like a bug. If one encloses the if-block in braces, I
instead get a warning:
int main()
{
if (1 == 2) [[unlikely]]
{
throw int{};
}
return 2;
}
results in:
% g++7 -std=c++17 test.cpp
test.cpp: In function 'int main()':
test.cpp:3:17: warning: attributes at the beginning of statement are ignored
[-Wattributes]
if (1 == 2) [[unlikely]]
^
Note that I am not even setting -Wall or -Wextra. Even then I would think that
unknown attributes should just be silently ignored as suggested by the
standard, or not?
Thanks for your help!
Tested versions:
g++7 (FreeBSD Ports Collection) 7.3.1 20180531
g++8 (FreeBSD Ports Collection) 8.1.1 20180608
g++9 (FreeBSD Ports Collection) 9.0.0 20180603 (experimental)
>From gcc-bugs-return-607770-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 15:23:17 2018
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Subject: [Bug c++/86243] unknown attributes causing hard error
Date: Wed, 20 Jun 2018 15:23:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Hannes Hauswedell from comment #0)
> Note that I am not even setting -Wall or -Wextra.
As documented, -Wattributes is enabled by default and you need to use
-Wno-attributes to disable it.
>From gcc-bugs-return-607771-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 15:25:42 2018
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Subject: [Bug tree-optimization/85859] [6/7/8/9 Regression] wrong code with -fno-isolate-erroneous-paths-dereference
Date: Wed, 20 Jun 2018 15:25:00 -0000
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--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 44305
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44305&action=edit
Tentative patch
>From gcc-bugs-return-607772-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 15:29:58 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86244] New: misleading use of "may be too large" in -Walloca-larger-than and -Wvla-larger-than warnings involving ranges
Date: Wed, 20 Jun 2018 15:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86244
Bug ID: 86244
Summary: misleading use of "may be too large" in
-Walloca-larger-than and -Wvla-larger-than warnings
involving ranges
Product: gcc
Version: 8.0
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While testing some changes to -Walloca-larger-than and -Wvla-larger-than I
noticed that the messages issued by the warnings are somewhat misleading in
cases when the alloca/VLA argument is in a range whose lower bound exceeds the
specified threshold. The message uses the phrase "may be too large" even
though the argument definitely is too large.
For comparison, the test case below shows the different format and wording of
the three diagnostics. It would be nice to make them all consistent (maybe
even by using the same function to issue them).
$ cat d.c && gcc -S -O2 -Wall -Walloc-size-larger-than=1 -Walloca-larger-than=1
-Wvla-larger-than=1 d.c
void f (void*);
void g (unsigned n)
{
if (n < 5 || 7 < n)
n = 5;
void *p = __builtin_malloc (n); // warning: n exceeds object size (good)
f (p);
}
void h (unsigned n)
{
n = 5;
void *p = __builtin_alloca (n); // warning: n is too large (good)
f (p);
}
void i (unsigned n)
{
if (n < 5 || 7 < n)
n = 5;
char a[n]; // warning: n may be too large even though it definitely is
f (a);
}
d.c: In function ‘g’:
d.c:8:13: warning: argument 1 range [5, 7] exceeds maximum object size 1
[-Walloc-size-larger-than=]
void *p = __builtin_malloc (n); // warning: n exceeds object size (good)
^~~~~~~~~~~~~~~~~~~~
d.c:8:13: note: in a call to built-in allocation function ‘__builtin_malloc’
d.c: In function ‘h’:
d.c:16:13: warning: argument to ‘alloca’ is too large [-Walloca-larger-than=]
void *p = __builtin_alloca (n); // warning: n is too large (good)
^~~~~~~~~~~~~~~~~~~~
d.c:16:13: note: limit is 1 bytes, but argument is 5
d.c: In function ‘i’:
d.c:26:8: warning: argument to variable-length array may be too large
[-Wvla-larger-than=]
char a[n]; // warning: n may be too large even though it definitely is
^
d.c:26:8: note: limit is 1 bytes, but argument may be as large as 7
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Subject: [Bug tree-optimization/86244] misleading use of "may be too large" in -Walloca-larger-than and -Wvla-larger-than warnings involving ranges
Date: Wed, 20 Jun 2018 15:32:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Severity|normal |minor
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Subject: [Bug c++/86240] [9 Regression] ice: unexpected expression absu_expr
Date: Wed, 20 Jun 2018 15:46:00 -0000
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Jun 20 15:46:02 2018
New Revision: 261809
URL: https://gcc.gnu.org/viewcvs?rev=261809&root=gcc&view=rev
Log:
PR c++/86240
* constexpr.c (cxx_eval_constant_expression): Handle ABSU_EXPR.
(fold_simple_1): Likewise.
* error.c (dump_expr): Likewise.
* g++.dg/pr86240.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/pr86240.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/cp/error.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86210] [6/7/8/9 Regression] Missing -Wnonnull warning for function defined in the same TU
Date: Wed, 20 Jun 2018 15:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86210
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
WIP patch to warn also during inlining, with the intent to handle e.g.
int *p = 0;
declared_and_defined(p);
for both C/C++. Unfortunately if it is inlined during early inlining, we still
don't warn, because no forward propagation etc. is done before early inlining.
With -fno-early-inlining -O2 -Wnonnull we don't warn either, because the call
is optimized away, as it is determined const and doesn't use return value.
With a side-effect in there it warns without early inlining.
Is this still worth doing?
--- gcc/tree-ssa-ccp.c.jj 2018-06-13 10:05:30.357110986 +0200
+++ gcc/tree-ssa-ccp.c 2018-06-20 17:14:00.374389421 +0200
@@ -3391,6 +3391,41 @@ make_pass_fold_builtins (gcc::context *c
return new pass_fold_builtins (ctxt);
}
+/* Emit -Wnonnull warnings for call STMT. */
+
+void
+warn_nonnull_call (gcall *stmt)
+{
+ bitmap nonnullargs = get_nonnull_args (gimple_call_fntype (stmt));
+ if (!nonnullargs)
+ return;
+
+ for (unsigned i = 0; i < gimple_call_num_args (stmt); i++)
+ {
+ tree arg = gimple_call_arg (stmt, i);
+ if (TREE_CODE (TREE_TYPE (arg)) != POINTER_TYPE)
+ continue;
+ if (!integer_zerop (arg))
+ continue;
+ if (!bitmap_empty_p (nonnullargs) && !bitmap_bit_p (nonnullargs, i))
+ continue;
+
+ location_t loc = gimple_location (stmt);
+ if (warning_at (loc, OPT_Wnonnull,
+ "%Gargument %u null where non-null expected",
+ stmt, i + 1))
+ {
+ tree fndecl = gimple_call_fndecl (stmt);
+ if (fndecl && DECL_IS_BUILTIN (fndecl))
+ inform (loc, "in a call to built-in function %qD", fndecl);
+ else if (fndecl)
+ inform (DECL_SOURCE_LOCATION (fndecl),
+ "in a call to function %qD declared here", fndecl);
+ }
+ }
+ BITMAP_FREE (nonnullargs);
+}
+
/* A simple pass that emits some warnings post IPA. */
namespace {
@@ -3437,41 +3474,7 @@ pass_post_ipa_warn::execute (function *f
continue;
if (warn_nonnull)
- {
- bitmap nonnullargs
- = get_nonnull_args (gimple_call_fntype (stmt));
- if (nonnullargs)
- {
- for (unsigned i = 0; i < gimple_call_num_args (stmt); i++)
- {
- tree arg = gimple_call_arg (stmt, i);
- if (TREE_CODE (TREE_TYPE (arg)) != POINTER_TYPE)
- continue;
- if (!integer_zerop (arg))
- continue;
- if (!bitmap_empty_p (nonnullargs)
- && !bitmap_bit_p (nonnullargs, i))
- continue;
-
- location_t loc = gimple_location (stmt);
- if (warning_at (loc, OPT_Wnonnull,
- "%Gargument %u null where non-null "
- "expected", as_a <gcall *>(stmt), i + 1))
- {
- tree fndecl = gimple_call_fndecl (stmt);
- if (fndecl && DECL_IS_BUILTIN (fndecl))
- inform (loc, "in a call to built-in function %qD",
- fndecl);
- else if (fndecl)
- inform (DECL_SOURCE_LOCATION (fndecl),
- "in a call to function %qD declared here",
- fndecl);
-
- }
- }
- BITMAP_FREE (nonnullargs);
- }
- }
+ warn_nonnull_call (as_a <gcall *>(stmt));
}
}
return 0;
--- gcc/tree-ssa-ccp.h.jj 2018-01-03 10:19:54.257533814 +0100
+++ gcc/tree-ssa-ccp.h 2018-06-20 17:14:38.915447584 +0200
@@ -26,4 +26,6 @@ void bit_value_binop (enum tree_code, si
void bit_value_unop (enum tree_code, signop, int, widest_int *, widest_int *,
signop, int, const widest_int &, const widest_int &);
+void warn_nonnull_call (gcall *);
+
#endif
--- gcc/tree-inline.c.jj 2018-06-20 08:15:41.224868655 +0200
+++ gcc/tree-inline.c 2018-06-20 17:34:39.676261250 +0200
@@ -60,6 +60,7 @@ along with GCC; see the file COPYING3.
#include "stringpool.h"
#include "attribs.h"
#include "sreal.h"
+#include "tree-ssa-ccp.h"
/* I'm not real happy about this, but we need to handle gimple and
non-gimple trees. */
@@ -4409,6 +4410,9 @@ expand_call_inline (basic_block bb, gimp
}
id->src_node = cg_edge->callee;
+ if (warn_nonnull && !gimple_no_warning_p (call_stmt))
+ warn_nonnull_call (call_stmt);
+
/* If callee is thunk, all we need is to adjust the THIS pointer
and redirect to function being thunked. */
if (id->src_node->thunk.thunk_p)
>From gcc-bugs-return-607776-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 15:48:01 2018
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Subject: [Bug c++/86240] [9 Regression] ice: unexpected expression absu_expr
Date: Wed, 20 Jun 2018 15:48:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607777-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 16:01:30 2018
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Subject: [Bug libstdc++/86245] New: _GLIBCXX_LONG_DOUBLE_COMPAT GLIBCXX_3.4.21 issues
Date: Wed, 20 Jun 2018 16:01:00 -0000
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Bug ID: 86245
Summary: _GLIBCXX_LONG_DOUBLE_COMPAT GLIBCXX_3.4.21 issues
Product: gcc
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The powerpc64-linux basic_symbols.txt shows a couple of problematic symbols:
FUNC:_ZNKSt7__cxx119money_getIcSt19istreambuf_iteratorIcSt11char_traitsIcEEE3getES4_S4_bRSt8ios_baseRSt12_Ios_IostateRg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_getIcSt19istreambuf_iteratorIcSt11char_traitsIcEEE6do_getES4_S4_bRSt8ios_baseRSt12_Ios_IostateRg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE3getES4_S4_bRSt8ios_baseRSt12_Ios_IostateRg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE6do_getES4_S4_bRSt8ios_baseRSt12_Ios_IostateRg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE3putES4_bRSt8ios_basecg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE6do_putES4_bRSt8ios_basecg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE3putES4_bRSt8ios_basewg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE6do_putES4_bRSt8ios_basewg@@GLIBCXX_3.4.21
One issue is that those really should have been added in the
_GLIBCXX_LONG_DOUBLE_COMPAT != 0 configurations to GLIBCXX_LDBL_3.4.21 symver
rather than GLIBCXX_3.4.21. Perhaps it is a waste to add alias for those
though and we can just live with that glitch. The bigger problem is that using
those symbols will not work in programs compiled with -mlong-double-64, because
nothing exports the corresponding e mangled symbols. I think that needs
fixing, either they can be implemented with a double argument and aliases (and
make the d mangled symbols hidden), or in separate source files that are
compiled with -mlong-double-64.
>From gcc-bugs-return-607778-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 16:01:54 2018
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Subject: [Bug c++/86243] unknown attributes causing hard error
Date: Wed, 20 Jun 2018 16:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86243
--- Comment #2 from Hannes Hauswedell <h2+bugs at fsfe dot org> ---
(In reply to Jonathan Wakely from comment #1)
> (In reply to Hannes Hauswedell from comment #0)
> > Note that I am not even setting -Wall or -Wextra.
>
> As documented, -Wattributes is enabled by default and you need to use
> -Wno-attributes to disable it.
Hm, IMHO this could maybe be reconsidered now that attributes are a
standardised feature of the language and the standard explicitly states:
"Any attribute-token that is not recognized by the implementation is ignored."
I think this was added precisely to make upgrades to new attributes seamless
and to support different platform-specific ones. This is not the case if they
produce warnings, especially by default.
BUT this bug report is primarily about the error and not the warning!
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Subject: [Bug c++/86210] [6/7/8/9 Regression] Missing -Wnonnull warning for function defined in the same TU
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jun 20 16:07:21 2018
New Revision: 261811
URL: https://gcc.gnu.org/viewcvs?rev=261811&root=gcc&view=rev
Log:
PR c++/86210
* c-common.c (check_nonnull_arg): Use fold_for_warn. Adjust obsolete
comment.
* g++.dg/warn/Wnonnull4.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/warn/Wnonnull4.C
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/86210] [6/7/8/9 Regression] Missing -Wnonnull warning for function defined in the same TU
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jun 20 16:08:14 2018
New Revision: 261812
URL: https://gcc.gnu.org/viewcvs?rev=261812&root=gcc&view=rev
Log:
PR c++/86210
* c-common.c (check_nonnull_arg): Use fold_for_warn. Adjust obsolete
comment.
* g++.dg/warn/Wnonnull4.C: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/warn/Wnonnull4.C
Modified:
branches/gcc-8-branch/gcc/c-family/ChangeLog
branches/gcc-8-branch/gcc/c-family/c-common.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/86210] [6/7/8/9 Regression] Missing -Wnonnull warning for function defined in the same TU
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Regression fixed for 8.2+ so far by the above changes, for the enhancement see
above comment.
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Subject: [Bug c++/86225] Missing error message
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is a dup of an existing bug.
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Subject: [Bug c++/85634] [8/9 Regression] ICE in tsubst_copy, at cp/pt.c:15483
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--- Comment #10 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Wed Jun 20 16:54:44 2018
New Revision: 261814
URL: https://gcc.gnu.org/viewcvs?rev=261814&root=gcc&view=rev
Log:
[PR c++/85634] Fix tsubst ICE
https://gcc.gnu.org/ml/gcc-patches/2018-06/msg01269.html
PR c++/85634 - tsubst ICE on unmarked lookup
* parser.c (cp_parser_primary_expression): Keep lookup in template.
PR c++/85634 - tsubst ICE on unmarked lookup
* g++.dg/lookup/pr85634.C: New.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/lookup/pr85634.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/parser.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/85634] [8/9 Regression] ICE in tsubst_copy, at cp/pt.c:15483
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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--- Comment #9 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed gcc-8 r261814
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Subject: [Bug c++/85634] [8/9 Regression] ICE in tsubst_copy, at cp/pt.c:15483
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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--- Comment #11 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Bah, there's another bug lurking in the original testcase ...
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Subject: [Bug c++/53109] e.E::~E() should compile without error in c++ 2011
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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Keywords| |rejects-valid
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Last reconfirmed| |2018-06-20
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think the code is valid and should be accepted.
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Subject: [Bug c++/38087] g++ accepts invalid destructor call
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CC| |zhonghao at pku dot org.cn
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 86225 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/86225] Missing error message
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
.
*** This bug has been marked as a duplicate of bug 38087 ***
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Subject: [Bug c++/86226] A bug seems to be not fully fixed
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to zhonghao from comment #0)
> It seems that the bug is not fixed, right?
Wrong. The old bug was fixed by making it a "pedwarn" i.e. diagnosing the
extension when -pedantic is used. That was fixed.
In C++2a the code is now valid, not a GNU extension, so you get no warning with
-std=c++2a, as expected.
This is not a bug.
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Subject: [Bug target/85918] Conversions to/from [unsigned] long long are not vectorized for AVX512DQ target
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85918
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.1+.
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Subject: [Bug tree-optimization/53947] [meta-bug] vectorizer missed-optimizations
Date: Wed, 20 Jun 2018 18:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
Bug 53947 depends on bug 85918, which changed state.
Bug 85918 Summary: Conversions to/from [unsigned] long long are not vectorized for AVX512DQ target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85918
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Subject: [Bug c++/85634] [8/9 Regression] ICE in tsubst_copy, at cp/pt.c:15483
Date: Wed, 20 Jun 2018 19:23:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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--- Comment #12 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Regression caused by first patch fixed in r261817.
No regression on gcc-8 branch.
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Subject: [Bug c++/85634] [8/9 Regression] ICE in tsubst_copy, at cp/pt.c:15483
Date: Wed, 20 Jun 2018 19:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85634
--- Comment #13 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Wed Jun 20 19:22:53 2018
New Revision: 261817
URL: https://gcc.gnu.org/viewcvs?rev=261817&root=gcc&view=rev
Log:
[PR c++/85634] Fix tsubst ICE
https://gcc.gnu.org/ml/gcc-patches/2018-06/msg01274.html
PR c++/85634
* friend.c (add_friend): Keep lookup sets of tempate sets.
PR c++/85634
* g++.dg/lookup/pr85634-2.C: New.
Added:
trunk/gcc/testsuite/g++.dg/lookup/pr85634-2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/friend.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug libstdc++/70966] new_delete_resource() has deinit lifetime issues.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug libstdc++/70966] new_delete_resource() has deinit lifetime issues.
Date: Wed, 20 Jun 2018 19:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70966
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Jun 20 19:34:53 2018
New Revision: 261818
URL: https://gcc.gnu.org/viewcvs?rev=261818&root=gcc&view=rev
Log:
PR libstdc++/70966 make pmr::new_delete_resource() immortal
Construct the program-wide resource objects using placement new. This
means they have dynamic storage duration and won't be destroyed during
termination.
PR libstdc++/70966
* include/experimental/memory_resource (__resource_adaptor_imp): Add
static assertions to enforce requirements on pointer types.
(__resource_adaptor_imp::get_allocator()): Add noexcept.
(new_delete_resource, null_memory_resource): Return address of an
object with dynamic storage duration.
(__null_memory_resource): Remove.
* testsuite/experimental/memory_resource/70966.cc: New.
Added:
trunk/libstdc++-v3/testsuite/experimental/memory_resource/70966.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/experimental/memory_resource
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From: "tqchen at cs dot washington.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86246] New: Template dispatching error inside a template function
Date: Wed, 20 Jun 2018 20:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86246
Bug ID: 86246
Summary: Template dispatching error inside a template function
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
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See bellow minimum reproducible example. There is also evidence that it still
exists in gcc-8.1, gcc-7 or prior versions do not have this problem
#include <type_traits>
class MyClass {
public:
operator double() const {
return 1;
}
template<typename T>
operator T() const {
static_assert(std::is_class<T>::value, "problem");
return T();
}
};
template<typename T>
void SetValue(const MyClass& obj, T* value) {
// always dispatches to operator T even if T is double
*value = obj.operator T();
}
int main() {
MyClass obj;
// works fine
obj.operator double();
double x;
// error, when operator T is called in SetValue
SetValue(obj, &x);
}
>From gcc-bugs-return-607797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 20:39:37 2018
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Subject: [Bug tree-optimization/86247] New: warning on alloca within a loop overly restrictive for constant loops
Date: Wed, 20 Jun 2018 20:39:00 -0000
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Bug ID: 86247
Summary: warning on alloca within a loop overly restrictive for
constant loops
Product: gcc
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The usability of the-Walloca-larger-than= warnings could be improved by taking
into consideration the product of the upper bound on the number of iterations
of the loop and the alloca argument. For example, the loop in the following
test case effectively results in allocating just 32 * 17 or 544 bytes, well
below the 4K limit set by the -Walloca-larger-than=4096 option. The warning
could be avoided in this case.
$ cat c.c && gcc -S -O2 -Wall -Wextra -Walloca-larger-than=4096 c.c
void f (void*, ...);
void g (void)
{
for (int i = 0; i != 17; ++i)
f (__builtin_alloca (32));
}
c.c: In function ‘g’:
c.c:6:5: warning: use of ‘alloca’ within a loop [-Walloca-larger-than=]
f (__builtin_alloca (32));
^~~~~~~~~~~~~~~~~~~~~~~~~
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Subject: [Bug rtl-optimization/86108] [8 Regression] crash during unwinding with -O2
Date: Wed, 20 Jun 2018 20:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86108
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jun 20 20:41:12 2018
New Revision: 261821
URL: https://gcc.gnu.org/viewcvs?rev=261821&root=gcc&view=rev
Log:
Backported from mainline
2018-06-16 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/86108
* bb-reorder.c (create_forwarder_block): Renamed to ...
(create_eh_forwarder_block): ... this. Split OLD_BB after labels and
jump from new landing pad to the second part.
(sjlj_fix_up_crossing_landing_pad, dw2_fix_up_crossing_landing_pad):
Adjust callers.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/bb-reorder.c
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86093] [8/9 Regression] volatile ignored on pointer in C
Date: Wed, 20 Jun 2018 20:41:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jun 20 20:40:33 2018
New Revision: 261820
URL: https://gcc.gnu.org/viewcvs?rev=261820&root=gcc&view=rev
Log:
Backported from mainline
2018-06-15 Jakub Jelinek <jakub@redhat.com>
PR c/86093
* c-typeck.c (pointer_diff): Cast both pointers to unqualified types
before doing POINTER_DIFF_EXPR.
* c-c++-common/pr86093.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/c-c++-common/pr86093.c
Modified:
branches/gcc-8-branch/gcc/c/ChangeLog
branches/gcc-8-branch/gcc/c/c-typeck.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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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++/86184] Conditional expression with omitted operand cannot use rvalue of type convertible to bool
Date: Wed, 20 Jun 2018 20:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86184
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
It looks like we should avoid wrapping a TARGET_EXPR in SAVE_EXPR:
4806 /* Make sure that lvalues remain lvalues. See g++.oliva/ext1.C.
*/
4807 if (lvalue_p (arg1))
4808 arg2 = arg1 = cp_stabilize_reference (arg1);
4809 else
4810 arg2 = arg1 = cp_save_expr (arg1);
because that makes the clk_class expression a clk_none.
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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++/86246] [8/9 Regression] Template dispatching error inside a template function
Date: Wed, 20 Jun 2018 20:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86246
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |7.3.0
Version|8.0.1 |8.1.0
Keywords| |rejects-valid
Last reconfirmed| |2018-06-20
CC| |nathan at gcc dot gnu.org
Ever confirmed|0 |1
Summary|Template dispatching error |[8/9 Regression] Template
|inside a template function |dispatching error inside a
| |template function
Known to fail| |8.1.0, 9.0
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Tianqi Chen from comment #0)
> There is also evidence that it
> still exists in gcc-8.1
We're really not interested in bugs reported against pre-release 8.0.1 builds
now that there's an actual 8.1 release. It's very easy to check the 8.1 release
using an online compiler such as https://wandbox.org
It does fail with 8.1 though.
Reduced:
namespace std {
template<typename T> struct is_class {
static constexpr bool value = true;
};
template<> struct is_class<double> {
static constexpr bool value = false;
};
}
class MyClass {
public:
operator double() const {
return 1;
}
template<typename T>
operator T() const {
static_assert(std::is_class<T>::value, "problem");
return T();
}
};
template<typename T>
void SetValue(const MyClass& obj, T* value) {
// always dispatches to operator T even if T is double
*value = obj.operator T();
}
int main() {
MyClass obj;
// works fine
obj.operator double();
double x;
// error, when operator T is called in SetValue
SetValue(obj, &x);
}
This compiled OK until r255605 when it started to ICE:
86246.cc: In instantiation of ‘void SetValue(const MyClass&, T*) [with T =
double]’:
86246.cc:34:19: required from here
86246.cc:25:25: internal compiler error: in tsubst_baselink, at cp/pt.c:14471
*value = obj.operator T();
~~~~~~~~~~~~~^
0xa0090e tsubst_baselink
../../gcc/cp/pt.c:14471
0xa14c27 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc/cp/pt.c:17980
0xa1270a tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc/cp/pt.c:17592
0xa11b30 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc/cp/pt.c:17433
0xa0e93c tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/cp/pt.c:16767
0xa08d23 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/cp/pt.c:16008
0xa0aadb tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/cp/pt.c:16251
0xa2be19 instantiate_decl(tree_node*, bool, bool)
../../gcc/cp/pt.c:23302
0xa2c7ca instantiate_pending_templates(int)
../../gcc/cp/pt.c:23416
0x8cfdc2 c_parse_final_cleanups()
../../gcc/cp/decl2.c:4666
0xb3f0b8 c_common_parse_file()
../../gcc/c-family/c-opts.c:1149
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.
Then at r256986 the ICE was fixed but it started calling the wrong function:
86246.cc: In instantiation of ‘MyClass::operator T() const [with T = double]’:
86246.cc:25:10: required from ‘void SetValue(const MyClass&, T*) [with T =
double]’
86246.cc:34:19: required from here
86246.cc:17:19: error: static assertion failed: problem
static_assert(std::is_class<T>::value, "problem");
^~~
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From: "longb at cray dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86248] New: LEN_TRIM in specification expression causes link failure
Date: Wed, 20 Jun 2018 21:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86248
Bug ID: 86248
Summary: LEN_TRIM in specification expression causes link
failure
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: longb at cray dot com
Target Milestone: ---
> cat modu6.f90
module test_module
implicit none
public :: func_1
integer :: string_length = 3
character(len=*),parameter :: fixed_string = "el_"
character(len=3),dimension(0:2),parameter :: darray_fixed =
(/"el0","el1","el2"/)
character(len=*),dimension(0:2),parameter :: darray = (/"el0","el1","el2"/)
contains
function func_1(func_1_input)
!Declaration section
integer, intent(in) :: func_1_input
!Test6
character(len=len_trim(darray_fixed(func_1_input))) :: func_1
func_1=darray(func_1_input)
end function func_1
end module test_module
> cat test.f90
program test
use test_module
implicit none
write(*,*) "Accessing Element index : ",0,"inside value : ",func_1(0)
write(*,*) "Accessing Element index : ",1,"inside value : ",func_1(1)
write(*,*) "Accessing Element index : ",2,"inside value : ",func_1(2)
end program test
> diff modu6.f90 modu8.f90
15c15
< character(len=len_trim(darray_fixed(func_1_input))) :: func_1
---
> character(len=len(darray_fixed(func_1_input))) :: func_1
>
Using LEN in specification works as expected:
> gfortran -c modu8.f90
> gfortran test.f90 modu8.o
> ./a.out
Accessing Element index : 0 inside value : el0
Accessing Element index : 1 inside value : el1
Accessing Element index : 2 inside value : el2
Using LEN_TRIM instead of LEN fails:
> gfortran -c modu6.f90
> gfortran test.f90 modu6.o
/lus/scratch/tmp/ccljHL3g.o: In function `MAIN__':
test.f90:(.text+0xaf): undefined reference to `__test_PROC_darray_fixed'
test.f90:(.text+0x212): undefined reference to `__test_PROC_darray_fixed'
test.f90:(.text+0x375): undefined reference to `__test_PROC_darray_fixed'
collect2: error: ld returned 1 exit status
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Subject: [Bug fortran/86248] LEN_TRIM in specification expression causes link failure
Date: Wed, 20 Jun 2018 21:04:00 -0000
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--- Comment #1 from Bill Long <longb at cray dot com> ---
Possibly related to 44265.
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From: "ian at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/86213] -fsplit-stack runtime may clobber SSE input param reg
Date: Wed, 20 Jun 2018 21:12:00 -0000
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--- Comment #1 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Wed Jun 20 21:11:23 2018
New Revision: 261823
URL: https://gcc.gnu.org/viewcvs?rev=261823&root=gcc&view=rev
Log:
libgcc/:
PR libgcc/86213
* generic-morestack.c (allocate_segment): Move calls to getenv and
getpagesize to __morestack_load_mmap.
(__morestack_load_mmap) Initialize static_pagesize and
use_guard_page here so as to avoid clobbering SSE regs during a
__morestack call.
gcc/testsuite/:
* gcc.dg/split-8.c: New.
Added:
trunk/gcc/testsuite/gcc.dg/split-8.c
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/libgcc/ChangeLog
trunk/libgcc/generic-morestack.c
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Subject: [Bug tree-optimization/85859] [6/7/8/9 Regression] wrong code with -fno-isolate-erroneous-paths-dereference
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85859
Tom de Vries <vries at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |patch
--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2018-06/msg01277.html
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/57005] alias template's pseudo-destructor is rejected
Date: Wed, 20 Jun 2018 21:50:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Last reconfirmed|2013-04-20 00:00:00 |2018-6-20
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
G++ still rejects this (as does EDG) but Clang accepts it.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/38087] g++ accepts invalid destructor call
Date: Wed, 20 Jun 2018 21:53:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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CC| |su at cs dot ucdavis.edu
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 71765 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/71765] incorrectly accepts invalid C++ code that invokes base class dtor
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
dup
*** This bug has been marked as a duplicate of bug 38087 ***
>From gcc-bugs-return-607809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 21:58:25 2018
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From: "ian at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgcc/86213] -fsplit-stack runtime may clobber SSE input param reg
Date: Wed, 20 Jun 2018 21:58:00 -0000
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--- Comment #2 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Wed Jun 20 21:57:44 2018
New Revision: 261826
URL: https://gcc.gnu.org/viewcvs?rev=261826&root=gcc&view=rev
Log:
libgcc/:
PR libgcc/86213
* generic-morestack.c (allocate_segment): Move calls to getenv and
getpagesize to __morestack_load_mmap.
(__morestack_load_mmap) Initialize static_pagesize and
use_guard_page here so as to avoid clobbering SSE regs during a
__morestack call.
gcc/testsuite/:
* gcc.dg/split-8.c: New.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/split-8.c
Modified:
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/libgcc/ChangeLog
branches/gcc-8-branch/libgcc/generic-morestack.c
>From gcc-bugs-return-607810-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 22:09:49 2018
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Subject: [Bug c++/48665] type of const member function
Date: Wed, 20 Jun 2018 22:09:00 -0000
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--- Comment #18 from David Blaikie <dblaikie at gmail dot com> ---
Thanks - looks like this got hashed out on the C++ reflector in favor of this
being invalid. The Clang bug has been re-opened to work on the fix there.
Thanks! Sorry for the noise.
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Subject: [Bug libgcc/86213] -fsplit-stack runtime may clobber SSE input param reg
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Ian Lance Taylor <ian at airs dot com> changed:
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--- Comment #3 from Ian Lance Taylor <ian at airs dot com> ---
Should be fixed.
>From gcc-bugs-return-607812-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 20 23:00:04 2018
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Subject: [Bug c++/48665] type of const member function
Date: Wed, 20 Jun 2018 23:00:00 -0000
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--- Comment #19 from Jonathan Wakely <redi at gcc dot gnu.org> ---
No problem, now that Richard raised it on the core reflector we should see the
implementation divergence fixed, which is a Good Thing.
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Subject: [Bug c++/86238] No diagnostic for virtual base class with inaccessible destructor
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-21
Ever confirmed|0 |1
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Subject: [Bug c++/86238] No diagnostic for virtual base class with inaccessible destructor
Date: Thu, 21 Jun 2018 00:10:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Simplified further:
struct B { ~B() {} };
struct C : private virtual B {};
struct D : C {} d;
>From gcc-bugs-return-607815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 01:23:02 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86249] New: declaration conflicts with target of using declaration already in scope
Date: Thu, 21 Jun 2018 01:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86249
Bug ID: 86249
Summary: declaration conflicts with target of using declaration
already in scope
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
Target Milestone: ---
The code is as follow:
namespace Name {
template <class T> class Point;
}
using Name::Point;
template <class T> class Point {
public:
Point() {}
protected:
T member;
};
int main(void) {
Name::Point<double> d;
return(0);
}
clang++ rejects the code with error messages:
error: declaration conflicts with target of using declaration already in scope
template <class T> class Point {
error: implicit instantiation of undefined template 'Name::Point<double>'
Name::Point<double> d;
g++ accepts the code. The code comes from a gcc bug report:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=1876
I thought that it is a clang++ bug, and reported it to
https://bugs.llvm.org/show_bug.cgi?id=37867
Richard Smith determined that this is a gcc bug. Shall gcc repair the bug, if
it is?
>From gcc-bugs-return-607816-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 01:36:18 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86250] New: addition of default argument on redeclaration makes this constructor a default constructor
Date: Thu, 21 Jun 2018 01:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86250
Bug ID: 86250
Summary: addition of default argument on redeclaration makes
this constructor a default constructor
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
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The code is as follow:
//#include <iostream>
//using namespace std;
class Z {
public:
// gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release) allows to
// write Z(int) while gcc version 2.97 20010205 wants Z(int j=43)
Z(int);
//void print ();
private:
int i;
};
Z::Z(int j=43): i(j){}
//void Z::print(void){ cout << "Z : i= " << i << ".\n";}
int main()
{
Z zobject=Z();
//zobject.print();
}
clang++ rejects, and produces the following error messages:
error: addition of default argument on redeclaration makes this constructor a
default constructor
Z::Z(int j=43): i(j){}
^ ~~
note: previous declaration is here
A previous version of gcc also rejects the code. The bug report is
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=2189
I reported this problem to clang: https://bugs.llvm.org/show_bug.cgi?id=37869
Richard Smith determined that the test case is ill-formed. So, is this a bug in
gcc, since it accepts ill-formed code?
>From gcc-bugs-return-607817-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 01:51:01 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86251] New: legal or illegal code?
Date: Thu, 21 Jun 2018 01:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86251
Bug ID: 86251
Summary: legal or illegal code?
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
Target Milestone: ---
Clang++ compiles the following code without any error messages:
#include <utility>
#include <iostream>
using namespace std;
template <typename _T, _T _V>
void foo()
{
cout << __PRETTY_FUNCTION__ << endl;
}
int a = 0;
int b() { cout << __PRETTY_FUNCTION__ << endl; }
int main()
{
foo<int, 9>();
foo<int (), b>();
}
In the contrast, gcc produces the following error message:
‘int()’ is not a valid type for a template non-type parameter foo<int (), b>();
A bug report of gcc (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=6030)
discusses more details of this issue.
I believed that clang++ shall add the error message as g++ does, and reported
the bug to https://bugs.llvm.org/show_bug.cgi?id=37829
However, Richard Smith believes that the code is legal, since int() decays to
int(*)(), which is valid.
His analysis seems to be contrary to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=6030. Is this a bug in g++?
>From gcc-bugs-return-607818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 01:57:26 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86252] New: Abstract class in function return type
Date: Thu, 21 Jun 2018 01:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86252
Bug ID: 86252
Summary: Abstract class in function return type
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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The code is as follow:
template<typename T>
struct S{};
struct A
{
virtual void f() = 0;
};
int main()
{
S<A(int)> s;
}
An abstract class shall not be used as a function return type, but clang++
accepts the code.
The code comes from a gcc bug report
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51184).
I reported the problem to clang: https://bugs.llvm.org/show_bug.cgi?id=37833
Richard Smith told me that the language rule changed recently.
Will g++ catch up the so-called rule change?
>From gcc-bugs-return-607819-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 02:01:36 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86253] New: N3639 array of runtime bound
Date: Thu, 21 Jun 2018 02:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86253
Bug ID: 86253
Summary: N3639 array of runtime bound
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
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The code is as follow:
int main(int argc, char** argv)
{
int x[1][argc];
[&x](int i)
{
x[0][i] = 0;
}(5);
return 0;
}
clang++ accepts the code, but g++ produces error messages:
capture of variably-modified type ‘int [1][argc]’ that is not an N3639 array of
runtime bound
because the array element type ‘int [argc]’ has variable size
I thought that this is a bug in clang, and reported it to
https://bugs.llvm.org/show_bug.cgi?id=37843
However, Richard Smith told me that clang++ can produce this message, since
clang++ has a feature that GCC's extension lacks. Does gcc have plan to
implement that feature?
>From gcc-bugs-return-607820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 02:04:21 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86254] New: g++ rejects legal code?
Date: Thu, 21 Jun 2018 02:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86254
Bug ID: 86254
Summary: g++ rejects legal code?
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
Target Milestone: ---
The code is as follow:
namespace N {
extern "C" {
extern const int foobar;
const int foobar = 1;
struct S { static const int foobar; };
const int S::foobar = 2;
}
}
int main () { return !(N::foobar + 1 == N::S::foobar); }
clang++ accepts the code, but g++ produces error messages:
conflicting declaration of ‘const int N::S::foobar’ with ‘C’ linkage
const int S::foobar = 2;
previous declaration with ‘C++’ linkage
struct S { static const int foobar; };
Indeed, the code comes from a bug report of gcc
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=33786). A previous version of g++
produces a different error message, but was fixed in the latest version.
I reported this as a bug in clang: https://bugs.llvm.org/show_bug.cgi?id=37844
However, Richard Smith told me that gcc is wrong. He cited a sentence "A C
language linkage is ignored in determining the language linkage of the names of
class members" to support his statement. This sounds like a specification. So,
is this really a bug in gcc?
>From gcc-bugs-return-607821-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 02:18:10 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86255] New: addition of default argument on redeclaration makes this constructor a default constructor
Date: Thu, 21 Jun 2018 02:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86255
Bug ID: 86255
Summary: addition of default argument on redeclaration makes
this constructor a default constructor
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
Target Milestone: ---
The code is as follow:
# 3 "bug3.cc"
class Z {
public:
Z(int);
private:
int i;
};
Z::Z(int j=43): i(j){}
int main()
{
Z zobject=Z();
}
clang++ produces the following errors:
bug3.cc:12:10: error: addition of default argument on redeclaration makes this
constructor a default constructor
Z::Z(int j=43): i(j){}
^ ~~
bug3.cc:7:2: note: previous declaration is here
The code comes from a gcc bug report:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=2189
I reported the difference to clang:https://bugs.llvm.org/show_bug.cgi?id=37850
Richard Smith told me that Clang's diagnostic is correct. So, is this a
recurring bug in g++?
>From gcc-bugs-return-607822-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 04:07:29 2018
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From: "kangchuanbo at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86256] New: Lambda will not add ref count for class intelligent pointer member when capture 'this' or & as argument
Date: Thu, 21 Jun 2018 04:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86256
Bug ID: 86256
Summary: Lambda will not add ref count for class intelligent
pointer member when capture 'this' or & as argument
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: kangchuanbo at 126 dot com
Target Milestone: ---
For example:
#include <iostream>
#include <memory>
class A {
public:
A(){
tmp = std::make_shared<int>(1);
}
void start() {
std::cout << "ref count : " << tmp.use_count() << std::endl;
std::shared_ptr<int> tmp2 = tmp;
std::cout << "ref count : " << tmp.use_count() << std::endl;
auto xxfunca = [this]() { std::cout<<"func1 ref count :
"<<tmp.use_count() << std::endl; };
std::cout << "ref count : " << tmp.use_count() << std::endl;
auto xxfuncb = [tmp2]() { std::cout<<"func2 ref count :
"<<tmp2.use_count() << std::endl; };
std::cout << "ref count : " << tmp.use_count() << std::endl;
auto xxfuncc = [&]() { std::cout<<"func2 ref count : "<<tmp.use_count()
<< std::endl; };
std::cout << "ref count : " << tmp.use_count() << std::endl;
}
private:
std::shared_ptr<int> tmp;
};
int main()
{
A a;
a.start();
return 0;
}
result and analyse：
[root~]]# ./test
ref count : 1 // tmp init ref count = 1
ref count : 2 // copy to tmp2，tmp ref count will incrase to 2
ref count : 2 // Lambda capture this，tmp ref count no incrase
ref count : 3 // Lambda capture tmp2，tmp ref count incrase to 3
ref count : 3 // Lambda capture &，tmp ref count no incrase
==========
The compiler will not copy class member, may feel too complex to check class
member, but should give warning or error to user when lambda capture Class with
intelligent member, or user may meet null pointer which lead to coredump.
Thanks.
>From gcc-bugs-return-607823-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 04:46:35 2018
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From: "jlangan at progress dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/86257] New: Program compiled with fPIC crashes while stepping over thread-local variable GDB
Date: Thu, 21 Jun 2018 04:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86257
Bug ID: 86257
Summary: Program compiled with fPIC crashes while stepping over
thread-local variable GDB
Product: gcc
Version: 4.4.7
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: jlangan at progress dot com
Target Milestone: ---
A detailed description (not mine) and workaround can be found at the following
address: (credit goes to those contributors). However, I need an official patch
for this - hence this request
The description starts with:
This is a very strange problem which occurs only when the program is compiled
with -fPIC option.
Using gdb I'm able to print thread local variables but stepping over them leads
to crash.
https://stackoverflow.com/questions/33429912/program-compiled-with-fpic-crashes-while-stepping-over-thread-local-variable-in/33557963#comment54798247_334
I am also seeing the same issue on the following:
Platform information
Linux 2.6.32-504.el6.x86_64 #1 SMP Wed Oct 15 04:27:16 UTC 2014 x86_64 x86_64
x86_64 GNU/Linux
gcc -v
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-ppl --with-cloog --with-tune=generic --with-arch_32=i686
--build=x86_64-redhat-linux
Thread model: posix
gcc version 4.4.7 20120313 (Red Hat 4.4.7-16) (GCC)
I also tried this with the following
$/opt/rh/devtoolset-3/root/usr/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/opt/rh/devtoolset-3/root/usr/bin/gcc
COLLECT_LTO_WRAPPER=/opt/rh/devtoolset-3/root/usr/libexec/gcc/x86_64-redhat-linux/4.9.2/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/opt/rh/devtoolset-3/root/usr
--mandir=/opt/rh/devtoolset-3/root/usr/share/man
--infodir=/opt/rh/devtoolset-3/root/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap
--enable-shared --enable-threads=posix --enable-checking=release
--enable-multilib --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --enable-languages=c,c++,fortran,lto --enable-plugin
--with-linker-hash-style=gnu --enable-initfini-array --disable-libgcj
--with-isl=/builddir/build/BUILD/gcc-4.9.2-20150212/obj-x86_64-redhat-linux/isl-install
--with-cloog=/builddir/build/BUILD/gcc-4.9.2-20150212/obj-x86_64-redhat-linux/cloog-install
--with-mpc=/builddir/build/BUILD/gcc-4.9.2-20150212/obj-x86_64-redhat-linux/mpc-install
--with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.9.2 20150212 (Red Hat 4.9.2-6) (GCC)
>From gcc-bugs-return-607824-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 04:56:08 2018
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From: "jlangan at progress dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/86258] New: Program compiled with fPIC crashes while stepping over thread-local variable GDB
Date: Thu, 21 Jun 2018 04:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86258
Bug ID: 86258
Summary: Program compiled with fPIC crashes while stepping over
thread-local variable GDB
Product: gcc
Version: 4.4.7
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: jlangan at progress dot com
Target Milestone: ---
A detailed description (not mine) and workaround can be found at the address
seen below: (credit goes to those contributors). However, I need an official
patch for this - hence this request
The description starts with:
-----------------------------------------------------
This is a very strange problem which occurs only when the program is compiled
with -fPIC option.
Using gdb I'm able to print thread local variables but stepping over them leads
to crash.
https://stackoverflow.com/questions/33429912/program-compiled-with-fpic-crashes-while-stepping-over-thread-local-variable-in/33557963#comment54798247_334
------------------------------------------------------
I am also seeing the same issue on the following:
Platform information
Linux 2.6.32-504.el6.x86_64 #1 SMP Wed Oct 15 04:27:16 UTC 2014 x86_64 x86_64
x86_64 GNU/Linux
gcc -v
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-ppl --with-cloog --with-tune=generic --with-arch_32=i686
--build=x86_64-redhat-linux
Thread model: posix
gcc version 4.4.7 20120313 (Red Hat 4.4.7-16) (GCC)
and also with the following
$/opt/rh/devtoolset-3/root/usr/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/opt/rh/devtoolset-3/root/usr/bin/gcc
COLLECT_LTO_WRAPPER=/opt/rh/devtoolset-3/root/usr/libexec/gcc/x86_64-redhat-linux/4.9.2/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/opt/rh/devtoolset-3/root/usr
--mandir=/opt/rh/devtoolset-3/root/usr/share/man
--infodir=/opt/rh/devtoolset-3/root/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap
--enable-shared --enable-threads=posix --enable-checking=release
--enable-multilib --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --enable-languages=c,c++,fortran,lto --enable-plugin
--with-linker-hash-style=gnu --enable-initfini-array --disable-libgcj
--with-isl=/builddir/build/BUILD/gcc-4.9.2-20150212/obj-x86_64-redhat-linux/isl-install
--with-cloog=/builddir/build/BUILD/gcc-4.9.2-20150212/obj-x86_64-redhat-linux/cloog-install
--with-mpc=/builddir/build/BUILD/gcc-4.9.2-20150212/obj-x86_64-redhat-linux/mpc-install
--with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.9.2 20150212 (Red Hat 4.9.2-6) (GCC)
>From gcc-bugs-return-607825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 05:43:30 2018
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From: "chefmax at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/86198] Libbacktrace does not properly work with ".note.gnu.build-id" section
Date: Thu, 21 Jun 2018 05:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86198
--- Comment #4 from chefmax at gcc dot gnu.org ---
Author: chefmax
Date: Thu Jun 21 05:42:53 2018
New Revision: 261832
URL: https://gcc.gnu.org/viewcvs?rev=261832&root=gcc&view=rev
Log:
libbacktrace/
2018-06-21 Denis Khalikov <d.khalikov@partner.samsung.com>
PR other/86198
* elf.c (elf_add): Increase ".note.gnu.build-id" section size
checking up to 36 bytes.
Modified:
trunk/libbacktrace/ChangeLog
trunk/libbacktrace/elf.c
>From gcc-bugs-return-607826-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 06:03:25 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86259] New: min(4, strlen(s)) optimized to strlen(s) with -flto
Date: Thu, 21 Jun 2018 06:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86259
Bug ID: 86259
Summary: min(4, strlen(s)) optimized to strlen(s) with -flto
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Keywords: lto, wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: gcc at thecybershadow dot net
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Build: x86_64-pc-linux-gnu
////////////////// test.c /////////////////
#include <stdio.h>
#include <string.h>
#define min(a, b) (((a) < (b)) ? (a) : (b))
char buf[32];
void fun1(char *s)
{
memcpy(buf, s, min(4, strlen(s)));
memcpy(buf, s, min(4, strlen(s)));
}
typedef struct
{
char s[4];
char s2;
} T;
void fun2(char* s)
{
T *t = (T *) s;
fun1(t->s);
}
int main()
{
fun2("abcdefghijklmnopqrstuvwxyz");
puts(buf);
return 0;
}
///////////////////////////////////////////
Gives different results with `gcc test.c` and `gcc -O2 -flto test.c`.
The buffer in the example above fits the entire string in either case, but in
the non-reduced application, this causes a heap buffer overflow.
Can be reproduced with 8.1.1 and current trunk (r261830).
>From gcc-bugs-return-607827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 06:21:45 2018
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Subject: [Bug tree-optimization/86259] min(4, strlen(s)) optimized to strlen(s) with -flto
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This code is undefined. Try -fno-strict-aliasing .
But that might not even cause the undefined code to be resolved to bring
defined as you are accessing outside the bounds of an array.
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Subject: [Bug tree-optimization/86259] min(4, strlen(s)) optimized to strlen(s) with -flto
Date: Thu, 21 Jun 2018 06:26:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note gcc thinks strlen(s) is less than or equal to 3 as s is really T.s which
is an array of 4 in size and there for the last element has to be a null char.
>From gcc-bugs-return-607829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 06:32:55 2018
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Subject: [Bug fortran/83118] [7/8/9 Regression] Bad intrinsic assignment of class(*) array component of derived type
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--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 44306
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44306&action=edit
Patch for comment #6.
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Subject: [Bug tree-optimization/86259] min(4, strlen(s)) optimized to strlen(s) with -flto
Date: Thu, 21 Jun 2018 06:42:00 -0000
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--- Comment #3 from Vladimir Panteleev <gcc at thecybershadow dot net> ---
(In reply to Andrew Pinski from comment #1)
> This code is undefined.
What's the problem? Might be just a bad reduction. Original code is Xorg:
https://cgit.freedesktop.org/xorg/xserver/tree/xkb/XKBGAlloc.c#n818
https://cgit.freedesktop.org/xorg/xserver/tree/xkb/xkb.c#n5140
> Try -fno-strict-aliasing .
No effect.
(In reply to Andrew Pinski from comment #2)
> Note gcc thinks strlen(s) is less than or equal to 3 as s is really T.s
> which is an array of 4 in size and there for the last element has to be a
> null char.
(In reply to Andrew Pinski from comment #2)
> Note gcc thinks strlen(s) is less than or equal to 3 as s is really T.s
> which is an array of 4 in size and there for the last element has to be a
> null char.
The original code looks closer to this:
typedef struct
{
unsigned char s[4];
unsigned char t[4];
} T;
void fun2(char* s)
{
T *t = (T *) s;
fun1((char*)t->s);
}
> there for the last element has to be a null char
Why is that? Is that specific to "char"? Is there a signed 8-bit type without
that property, then?
I can try to re-reduce, but I'm not sure what the restrictions are.
>From gcc-bugs-return-607831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 06:44:47 2018
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Subject: [Bug tree-optimization/86259] min(4, strlen(s)) optimized to strlen(s) with -flto
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--- Comment #4 from Vladimir Panteleev <gcc at thecybershadow dot net> ---
(In reply to Andrew Pinski from comment #2)
> Note gcc thinks strlen(s) is less than or equal to 3 as s is really T.s
> which is an array of 4 in size and there for the last element has to be a
> null char.
Why does that apply only to the second strcpy, then?
>From gcc-bugs-return-607832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 06:47:05 2018
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Subject: [Bug c++/71484] Class with implicit public constructor triggers `-Wctor-dtor-privacy`
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Olivier Kannengieser <okannen at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |okannen at gmail dot com
--- Comment #2 from Olivier Kannengieser <okannen at gmail dot com> ---
In GCC 8.1,
#pragma GCC diagnostic ignored "-Wctor-dtor-privacy",
does not fully disable the diagnostic message:
----------> without ignored diagnostic:
test.cpp:2:8: warning: ‘struct S’ only defines private constructors and
has no friends [-Wctor-dtor-privacy]
struct S{
^
test.cpp:4:3: note: ‘constexpr S::S(const S&)’ is public, but requires
an existing ‘struct S’ object
S(const S&) = default;
-----------> with ignored diagnostic:
test.cpp:4:3: note: ‘constexpr S::S(const S&)’ is public, but requires
an existing ‘struct S’ object
S(const S&) = default;
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Subject: [Bug tree-optimization/86259] min(4, strlen(s)) optimized to strlen(s) with -flto
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--- Comment #5 from Vladimir Panteleev <gcc at thecybershadow dot net> ---
(In reply to Andrew Pinski from comment #2)
> Note gcc thinks strlen(s) is less than or equal to 3 as s is really T.s
> which is an array of 4 in size and there for the last element has to be a
> null char.
Hmm. Here is a simpler example which illustrates this:
/////////////////// test.c ///////////////////
#include <stdio.h>
#include <string.h>
struct S
{
int x[1];
};
union U
{
struct S arr[64];
char s[256];
};
int main()
{
union U u;
strcpy(u.s, "abcdefghijklmnopqrstuvwxyz");
size_t len = strlen((char*)&u.arr[1].x);
puts(len > 10 ? "YES" : "NO");
return 0;
}
//////////////////////////////////////////////
This prints "NO" with -O1 and above. clang always prints "YES".
Are you sure this is an optimization the compiler is allowed to make, though? I
would think that the explicit cast to char* removes all bets as to how long the
string really is.
>From gcc-bugs-return-607835-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 07:25:30 2018
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Subject: [Bug tree-optimization/81884] [6 Regression] Invalid code generation with zero size arrays or flexible array members
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607836-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 07:25:59 2018
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Subject: [Bug tree-optimization/85244] [6 Regression] Bad optimisation with flexible array member (may be related to -ftree-dominator-opts)
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 21 07:24:06 2018
New Revision: 261833
URL: https://gcc.gnu.org/viewcvs?rev=261833&root=gcc&view=rev
Log:
2018-06-21 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-08-21 Richard Biener <rguenther@suse.de>
PR middle-end/81884
* tree-ssa-alias.c (stmt_kills_ref_p): Handle array accesses
at struct end conservatively when comparing common bases.
* g++.dg/torture/pr81884.C: New testcase.
2017-05-04 Richard Biener <rguenther@suse.de>
* tree.c (array_at_struct_end_p): Handle arrays at struct
end with flexarrays more conservatively. Refactor and treat
arrays of arrays or aggregates more strict. Fix
VIEW_CONVERT_EXPR handling.
2018-04-06 Richard Biener <rguenther@suse.de>
PR middle-end/85244
* tree-dfa.c (get_ref_base_and_extent): Reset seen_variable_array_ref
after seeing a component reference with an adjacent field. Treat
refs to arrays at struct end of external decls similar to
refs to unconstrained commons.
* gcc.dg/torture/pr85244-1.c: New testcase.
* gcc.dg/torture/pr85244-2.c: Likewise.
* gcc.dg/tree-prof/pr66295.c: Remove unsupported dg-error scanning.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr81884.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr85244-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr85244-2.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/testsuite/gcc.dg/tree-prof/pr66295.c
branches/gcc-6-branch/gcc/tree-dfa.c
branches/gcc-6-branch/gcc/tree-ssa-alias.c
branches/gcc-6-branch/gcc/tree.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85244
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
Known to fail| |6.4.0
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607837-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 07:26:00 2018
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Subject: [Bug tree-optimization/81884] [6 Regression] Invalid code generation with zero size arrays or flexible array members
Date: Thu, 21 Jun 2018 07:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81884
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 21 07:24:06 2018
New Revision: 261833
URL: https://gcc.gnu.org/viewcvs?rev=261833&root=gcc&view=rev
Log:
2018-06-21 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-08-21 Richard Biener <rguenther@suse.de>
PR middle-end/81884
* tree-ssa-alias.c (stmt_kills_ref_p): Handle array accesses
at struct end conservatively when comparing common bases.
* g++.dg/torture/pr81884.C: New testcase.
2017-05-04 Richard Biener <rguenther@suse.de>
* tree.c (array_at_struct_end_p): Handle arrays at struct
end with flexarrays more conservatively. Refactor and treat
arrays of arrays or aggregates more strict. Fix
VIEW_CONVERT_EXPR handling.
2018-04-06 Richard Biener <rguenther@suse.de>
PR middle-end/85244
* tree-dfa.c (get_ref_base_and_extent): Reset seen_variable_array_ref
after seeing a component reference with an adjacent field. Treat
refs to arrays at struct end of external decls similar to
refs to unconstrained commons.
* gcc.dg/torture/pr85244-1.c: New testcase.
* gcc.dg/torture/pr85244-2.c: Likewise.
* gcc.dg/tree-prof/pr66295.c: Remove unsupported dg-error scanning.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr81884.C
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr85244-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr85244-2.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/testsuite/gcc.dg/tree-prof/pr66295.c
branches/gcc-6-branch/gcc/tree-dfa.c
branches/gcc-6-branch/gcc/tree-ssa-alias.c
branches/gcc-6-branch/gcc/tree.c
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From: "ladis@linux-mips.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/85966] New: [ARM] No unwinding support for division functions
Date: Thu, 21 Jun 2018 07:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85966
Bug ID: 85966
Summary: [ARM] No unwinding support for division functions
Product: gcc
Version: unknown
Status: RESOLVED
Severity: normal
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
Reporter: ladis@linux-mips.org
Target Milestone: ---
Status: RESOLVED
Resolution: DUPLICATE
__aeabi_idiv is missing unwinding info, so backtrace stops there not providing
information where division by zero happened. Tested with gcc-5.4.0 and
gcc-7.3.1, but given the fact libgcc/config/arm/lib1funcs.S is not receiving
any updates, all gcc versions are affected.
Test case compiled with gcc-5.4.0:
$ arm-v7a-linux-gnueabi-gcc -o test -g -rdynamic -funwind-tables
-fasynchronous-unwind-tables -fno-omit-frame-pointer sigfpe_div0_bt.c
./test
Stack trace:
/lib/libc.so.6(+0x16a66) [0xb6e39a66]
/lib/libc.so.6(gsignal+0x23) [0xb6e47600]
The same test case using gcc-7.3.1 on x86_64:
$ gcc -o test -g -rdynamic -funwind-tables -fasynchronous-unwind-tables
-fno-omit-frame-pointer sigfpe_div0_bt.c
$ ./test
Stack trace:
./test(baz+0x16) [0x55ef13367dd0]
./test(bar+0x15) [0x55ef13367dfe]
./test(foo+0x15) [0x55ef13367e16]
./test(main+0xb8) [0x55ef13367ed1]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7ff3e4402a87]
./test(_start+0x2a) [0x55ef13367b5a]
Using following naive patch in attachment makes things better...
--- a/libgcc/config/arm/lib1funcs.S 2018-05-29 01:20:17.816878829 +0200
+++ b/libgcc/config/arm/lib1funcs.S 2018-05-29 01:28:04.697491881 +0200
@@ -1344,7 +1344,9 @@
ARM_FUNC_START div0
#endif
+ .fnstart
do_push {r1, lr}
+ .save {r1, lr}
mov r0, #SIGFPE
bl SYM(raise) __PLT__
RETLDM r1
@@ -1355,6 +1357,7 @@
#else
FUNC_END div0
#endif
+ .fnend
#endif /* L_dvmd_lnx */
#ifdef L_clear_cache
Stack trace:
/lib/libc.so.6(+0x16a66) [0xb6e19a66]
/lib/libc.so.6(gsignal+0x23) [0xb6e27600]
./test() [0x10eea]
./test(baz+0x13) [0x10b64]
I would welcome if ARM could unwind in this situation too as it makes
backtraces more meaningful given limited environment of typical arm embedded
board.
--- Comment #1 from Ladislav Michl <ladis@linux-mips.org> ---
Not really sure why this bug was submitted twice. Marking this one as duplicate
with apologies. Thank you.
*** This bug has been marked as a duplicate of bug 85967 ***
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Subject: [Bug libgcc/85967] [ARM] No unwinding support for division functions
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--- Comment #2 from Ladislav Michl <ladis@linux-mips.org> ---
*** Bug 85966 has been marked as a duplicate of this bug. ***
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Subject: [Bug tree-optimization/86214] [8/9 Regression] Strongly increased stack usage
Date: Thu, 21 Jun 2018 08:42:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target Milestone|--- |8.2
Summary|[8 Regression] Strongly |[8/9 Regression] Strongly
|increased stack usage |increased stack usage
>From gcc-bugs-return-607842-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 08:42:48 2018
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Subject: [Bug c++/86216] g++ ICE on valid code: verify_ssa failed
Date: Thu, 21 Jun 2018 08:42:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|NEW |ASSIGNED
Version|unknown |9.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think GCC 9 has a fix for the issue you see with GCC 8. And earlier GCC ICE
differently again...
I suspect the GCC 9 issue is mine (gimplifcation into "SSA"). .gimple has:
b(intptr_t, T) [with T = int]::<lambda()>::<lambda()>::operator() (const struct
__lambda3 * const this)
{
intptr_t & n [value-expr: this->__n];
{
_1 = _1 + 1;
_2 = (unsigned int) _1;
_3 = _2 * 4;
_4 = this->__n;
_5 = (int) _3;
*_4 = _5;
}
>From gcc-bugs-return-607841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 08:42:47 2018
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Subject: [Bug c++/56958] Spurious set but not used variable warning in empty pack expansion
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Will Benfold <will at benfold dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |will at benfold dot com
--- Comment #5 from Will Benfold <will at benfold dot com> ---
Still present in 7.3.0:
----------------------------------------------------------------
$ cat test.cpp
template<int...Is>
int foo (int n)
{
return (( (n) + Is ) + ... + 0);
}
int main (int, char *[])
{
foo<1>(0);
foo<>(0);
return 0;
}
$ g++ -std=c++17 -Wall -Wextra -o test test.cpp
test.cpp: In instantiation of ‘int foo(int) [with int ...Is = {}]’:
test.cpp:10:10: required from here
test.cpp:2:14: warning: parameter ‘n’ set but not used
[-Wunused-but-set-parameter]
int foo (int n)
----------------------------------------------------------------
The warning goes away if the parentheses are removed from (n), or if it's
changed to (n+0).
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Subject: [Bug fortran/86220] [9 Regression] ICE in gfc_conv_structure, at fortran/trans-expr.c:7789
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86220
Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-607844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 08:55:08 2018
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Subject: [Bug tree-optimization/86223] missing -Warray-bounds on an access to an implicitly zeroed out array
Date: Thu, 21 Jun 2018 08:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86223
Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |rguenth at gcc dot gnu.org
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
We gimplify g to
a = {};
_2 = a[i];
but h to
a[0] = 0;
a[1] = 0;
a[2] = 0;
_2 = a[i];
that is IMHO a missed optimization. With the g IL we fold a[i] to zero
while with the h IL we do not (that's somewhat inconsistent I agree).
If you do
int a[3] = { 1 };
you get the desired warning.
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Subject: [Bug tree-optimization/86223] missing -Warray-bounds on an access to an implicitly zeroed out array
Date: Thu, 21 Jun 2018 09:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86223
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
That's because of
else if (!complete_p)
/* If the constructor isn't complete, clear the whole object
beforehand, unless CONSTRUCTOR_NO_CLEARING is set on it.
??? This ought not to be needed. For any element not present
in the initializer, we should simply set them to zero. Except
we'd need to *find* the elements that are not present, and that
requires trickery to avoid quadratic compile-time behavior in
large cases or excessive memory use in small cases. */
cleared = !CONSTRUCTOR_NO_CLEARING (ctor);
but for the complete case
else if (num_ctor_elements - num_nonzero_elements
> CLEAR_RATIO (optimize_function_for_speed_p (cfun))
&& num_nonzero_elements < num_ctor_elements / 4)
/* If there are "lots" of zeros, it's more efficient to clear
the memory and then set the nonzero elements. */
cleared = true;
doesn't trigger. I believe that the gimplifier deciding on elementwise
vs. copy-from-initializer is premature (but that's another story).
So to make the behavior consistent the easiest approach would be to
emit {} for all-zero initializers always. Not sure if that's the best
for optimization. A different fix would be to fix that ??? comment.
diff --git a/gcc/gimplify.c b/gcc/gimplify.c
index 97543ed5f70..ccdc127143d 100644
--- a/gcc/gimplify.c
+++ b/gcc/gimplify.c
@@ -4805,6 +4805,10 @@ gimplify_init_constructor (tree *expr_p, gimple_seq
*pre_p, gimple_seq *post_p,
requires trickery to avoid quadratic compile-time behavior in
large cases or excessive memory use in small cases. */
cleared = !CONSTRUCTOR_NO_CLEARING (ctor);
+ else if (num_nonzero_elements == 0)
+ /* If all elements are zero it is most efficient to block-clear
+ things. */
+ cleared = true;
else if (num_ctor_elements - num_nonzero_elements
> CLEAR_RATIO (optimize_function_for_speed_p (cfun))
&& num_nonzero_elements < num_ctor_elements / 4)
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86261] New: [8/9 Regression] incorrect -Wformat-truncation warning
Date: Thu, 21 Jun 2018 09:02:00 -0000
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Bug ID: 86261
Summary: [8/9 Regression] incorrect -Wformat-truncation warning
Product: gcc
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#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
struct octet_string {
char *data;
size_t length;
};
static int time2generalizedtime(time_t t, struct octet_string *s, int gtimep)
{
struct tm *tm = NULL;
const size_t len = gtimep ? 15 : 13;
s->data = malloc(len + 1);
if (s->data == NULL)
return ENOMEM;
s->length = len;
tm = gmtime(&t);
if (gtimep)
snprintf (s->data, len + 1, "%04d%02d%02d%02d%02d%02dZ",
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
else
snprintf (s->data, len + 1, "%02d%02d%02d%02d%02d%02dZ",
tm->tm_year % 100, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
return 0;
}
int main(void)
{
struct octet_string data;
time_t now = time(0);
int rc;
rc = time2generalizedtime(now, &data, 0);
if (rc != 0) {
return 1;
}
return 0;
}
prints (also with -O2 or -O3):
gcc -O -Wall -Werror=format-truncation gcc_snprintf.c
gcc_snprintf.c: In function ‘main’:
gcc_snprintf.c:28:47: error: ‘%02d’ directive output may be truncated writing
between 2 and 11 bytes into a region of size between 0 and 10
[-Werror=format-truncation=]
snprintf (s->data, len + 1, "%02d%02d%02d%02d%02d%02dZ",
^~~~
gcc_snprintf.c:28:10: note: ‘snprintf’ output between 14 and 60 bytes into a
destination of size 14
snprintf (s->data, len + 1, "%02d%02d%02d%02d%02d%02dZ",
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tm->tm_year % 100, tm->tm_mon + 1, tm->tm_mday,
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tm->tm_hour, tm->tm_min, tm->tm_sec);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
I don't really see how this can print 60 bytes as the integers are limited.
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Subject: [Bug tree-optimization/86241] duplicate strlen-like snprintf calls not folded
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |missed-optimization
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The alias machinery knows nothing about "type" rules for function calls so I
don't see how this is possible w/o running into the same issue as with removing
the redundant strlen call.
That is, for g() hopefully we fold the snprintf to strlen. Not sure why
that's done only late during the strlen pass and not by gimple_fold ().
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Subject: [Bug c++/86246] [8/9 Regression] Template dispatching error inside a template function
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----------------------------------------------------------------------------
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Subject: [Bug c++/86253] N3639 array of runtime bound
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Subject: [Bug debug/86257] Program compiled with fPIC crashes while stepping over thread-local variable GDB
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code, wrong-debug
Target| |x86_64-*-*
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testcase from stackoverflow
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#define MAX_NUMBER_OF_THREADS 2
struct mystruct {
int x;
int y;
};
__thread struct mystruct obj;
void* threadMain(void *args) {
obj.x = 1;
obj.y = 2;
printf("obj.x = %d\n", obj.x);
printf("obj.y = %d\n", obj.y);
return NULL;
}
int main(int argc, char *arg[]) {
pthread_t tid[MAX_NUMBER_OF_THREADS];
int i = 0;
for(i = 0; i < MAX_NUMBER_OF_THREADS; i++) {
pthread_create(&tid[i], NULL, threadMain, NULL);
}
for(i = 0; i < MAX_NUMBER_OF_THREADS; i++) {
pthread_join(tid[i], NULL);
}
return 0;
}
and my reproduction with GCC 8:
> gcc-8 t.c -g -lpthread -fPIC
> gdb ./a.out
GNU gdb (GDB; devel:gcc) 8.1
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
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For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from ./a.out...done.
(gdb) b threadMain
Breakpoint 1 at 0x4006cf: file t.c, line 15.
(gdb) r
Starting program: /tmp/a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7ffff781d700 (LWP 12830)]
[New Thread 0x7ffff701c700 (LWP 12831)]
[Switching to Thread 0x7ffff781d700 (LWP 12830)]
Thread 2 "a.out" hit Breakpoint 1, threadMain (args=0x0) at t.c:15
15 obj.x = 1;
(gdb) p obj.x
$1 = 0
(gdb) n
Thread 2 "a.out" received signal SIGSEGV, Segmentation fault.
threadMain (args=0x0) at t.c:15
15 obj.x = 1;
>From gcc-bugs-return-607851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 09:25:07 2018
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Subject: [Bug debug/86258] Program compiled with fPIC crashes while stepping over thread-local variable GDB
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
dup
*** This bug has been marked as a duplicate of bug 86257 ***
>From gcc-bugs-return-607852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 09:25:11 2018
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Subject: [Bug debug/86257] Program compiled with fPIC crashes while stepping over thread-local variable GDB
Date: Thu, 21 Jun 2018 09:25:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 86258 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 09:34:22 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/86259] [8/9 Regression] min(4, strlen(s)) optimized to strlen(s) with -flto
Date: Thu, 21 Jun 2018 09:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Keywords|lto |
Last reconfirmed| |2018-06-21
CC| |msebor at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Summary|min(4, strlen(s)) optimized |[8/9 Regression] min(4,
|to strlen(s) with -flto |strlen(s)) optimized to
| |strlen(s) with -flto
Target Milestone|--- |8.2
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Vladimir Panteleev from comment #5)
> (In reply to Andrew Pinski from comment #2)
> > Note gcc thinks strlen(s) is less than or equal to 3 as s is really T.s
> > which is an array of 4 in size and there for the last element has to be a
> > null char.
>
> Hmm. Here is a simpler example which illustrates this:
>
> /////////////////// test.c ///////////////////
> #include <stdio.h>
> #include <string.h>
>
> struct S
> {
> int x[1];
> };
>
> union U
> {
> struct S arr[64];
> char s[256];
> };
>
> int main()
> {
> union U u;
> strcpy(u.s, "abcdefghijklmnopqrstuvwxyz");
> size_t len = strlen((char*)&u.arr[1].x);
> puts(len > 10 ? "YES" : "NO");
> return 0;
> }
> //////////////////////////////////////////////
>
> This prints "NO" with -O1 and above. clang always prints "YES".
>
> Are you sure this is an optimization the compiler is allowed to make,
> though? I would think that the explicit cast to char* removes all bets as to
> how long the string really is.
the explicit conversion to char * is unimportant (strlen formal argument
is of type const char * already). Indeed strlen may read any memory
and thus is not bound to type layout.
GCC optimizes this during CCP which nowadays uses get_range_strlen (),
IMHO indeed a questionable optimization we shouldn't perform. The
optimization happens because of
if (tree lhs = gimple_call_lhs (stmt))
if (TREE_CODE (lhs) == SSA_NAME
&& INTEGRAL_TYPE_P (TREE_TYPE (lhs)))
set_range_info (lhs, VR_RANGE, minlen, maxlen);
and we compute maxlen to 3.
That function was designed for warnings we may not use it for optimization.
>From gcc-bugs-return-607854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 09:44:46 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86232] [9 Regression] ICE in record_estimate, at tree-ssa-loop-niter.c:3258
Date: Thu, 21 Jun 2018 09:44:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Known to work| |8.1.1
Keywords| |ice-on-valid-code
Last reconfirmed| |2018-06-21
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Summary|ICE in record_estimate, at |[9 Regression] ICE in
|tree-ssa-loop-niter.c:3258 |record_estimate, at
| |tree-ssa-loop-niter.c:3258
Target Milestone|--- |9.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
3258 gcc_checking_assert (i_bound == wi::to_widest (bound));
(gdb) l
3253 /* If the I_BOUND is just an estimate of BOUND, it rarely is close to
the
3254 real number of iterations. */
3255 if (TREE_CODE (bound) != INTEGER_CST)
3256 realistic = false;
3257 else
3258 gcc_checking_assert (i_bound == wi::to_widest (bound));
3259
3260 /* If we have a guaranteed upper bound, record it in the appropriate
3261 list, unless this is an !is_exit bound (i.e. undefined behavior in
3262 at_stmt) in a loop with known constant number of iterations. */
(gdb) p i_bound
$1 = (const widest_int &) @0x7fffffffd738: {<fixed_wide_int_storage<192>> = {
val = {32, 140737330801152, 140737330854096, 140737329677800}, len = 1},
static is_sign_extended = <optimized out>}
(gdb) p bound
$2 = <integer_cst 0x7ffff69cb8d0>
(gdb) p debug_generic_expr (bound)
1
$3 = void
that's because we compute niter to constant 1 but specify a max of 32.
Fix:
diff --git a/gcc/tree-ssa-loop-niter.c b/gcc/tree-ssa-loop-niter.c
index 936591502d0..f5ffc0f19ad 100644
--- a/gcc/tree-ssa-loop-niter.c
+++ b/gcc/tree-ssa-loop-niter.c
@@ -2575,9 +2575,6 @@ number_of_iterations_popcount (loop_p loop, edge exit,
return false;
/* Update NITER params accordingly */
- max = TYPE_PRECISION (TREE_TYPE (src));
- if (adjust)
- max = max - 1;
tree utype = unsigned_type_for (TREE_TYPE (src));
src = fold_convert (utype, src);
tree call = fold_convert (utype, build_call_expr (fn, 1, src));
@@ -2588,6 +2585,15 @@ number_of_iterations_popcount (loop_p loop, edge exit,
else
iter = call;
+ if (TREE_CODE (call) == INTEGER_CST)
+ max = tree_to_uhwi (call);
+ else
+ {
+ max = TYPE_PRECISION (TREE_TYPE (src));
+ if (adjust)
+ max = max - 1;
+ }
+
niter->niter = iter;
niter->assumptions = boolean_true_node;
if (adjust)
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Subject: [Bug tree-optimization/85588] [6 Regression] -fwrapv miscompilation
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 21 09:50:36 2018
New Revision: 261839
URL: https://gcc.gnu.org/viewcvs?rev=261839&root=gcc&view=rev
Log:
2018-06-21 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-02-28 Richard Biener <rguenther@suse.de>
PR middle-end/84607
* genmatch.c (capture_info::walk_match): Do not mark
captured expressions without operands as expr_p given
they act more like predicates and should be subject to
"lost tail" side-effect preserving.
* gcc.dg/pr84607.c: New testcase.
2018-05-04 Richard Biener <rguenther@suse.de>
PR middle-end/85588
* fold-const.c (negate_expr_p): Restrict negation of operand
zero of a division to when we know that can happen without
overflow.
(fold_negate_expr_1): Likewise.
* gcc.dg/torture/pr85588.c: New testcase.
* gcc.dg/torture/pr57656.c: Use dg-additional-options.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr84607.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr85588.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/genmatch.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr57656.c
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Subject: [Bug tree-optimization/85588] [6 Regression] -fwrapv miscompilation
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
Known to fail| |6.4.0
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c/84607] [6 Regression] Side effects discarded in address computation inside 'if'
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84607
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 21 09:50:36 2018
New Revision: 261839
URL: https://gcc.gnu.org/viewcvs?rev=261839&root=gcc&view=rev
Log:
2018-06-21 Richard Biener <rguenther@suse.de>
Backport from mainline
2018-02-28 Richard Biener <rguenther@suse.de>
PR middle-end/84607
* genmatch.c (capture_info::walk_match): Do not mark
captured expressions without operands as expr_p given
they act more like predicates and should be subject to
"lost tail" side-effect preserving.
* gcc.dg/pr84607.c: New testcase.
2018-05-04 Richard Biener <rguenther@suse.de>
PR middle-end/85588
* fold-const.c (negate_expr_p): Restrict negation of operand
zero of a division to when we know that can happen without
overflow.
(fold_negate_expr_1): Likewise.
* gcc.dg/torture/pr85588.c: New testcase.
* gcc.dg/torture/pr57656.c: Use dg-additional-options.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr84607.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr85588.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/genmatch.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr57656.c
>From gcc-bugs-return-607857-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 09:51:19 2018
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Subject: [Bug c/84607] [6 Regression] Side effects discarded in address computation inside 'if'
Date: Thu, 21 Jun 2018 09:51:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
Known to fail| |6.4.0
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 09:54:49 2018
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From: "simon.kluepfel at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86262] New: allocation with non-parameter array expression as SOURCE sets LBOUND to 0
Date: Thu, 21 Jun 2018 09:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86262
Bug ID: 86262
Summary: allocation with non-parameter array expression as
SOURCE sets LBOUND to 0
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: simon.kluepfel at gmail dot com
Target Milestone: ---
Created attachment 44307
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44307&action=edit
source code
If a variable expression is used as SOURCE in an allocate statement, the lower
bound is not set correctly to one.
The most exemplary lines in the attached code are the different results for
allocate(rarr1,source= rarr )
and
allocate(rarr2,source=(rarr))
For an expression of a parameter as SOURCE all seems to work as expected.
The output using gfortran 6 to 8 is for me:
1 2 2
1 2 2
0 2 1
1 2 2
1 2 2
1 2 2
0 2 1
0 2 1
It should be all as the first line I would think.
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Subject: [Bug fortran/86262] allocation with non-parameter array expression as SOURCE sets LBOUND to 0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86262
--- Comment #1 from Simon Klüpfel <simon.kluepfel at gmail dot com> ---
Though I did search, right after I submitted the bug I saw it is already filed,
e.g. as Bug 85534. Sorry for that, I guess my report does not add much.
>From gcc-bugs-return-607861-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 10:01:11 2018
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Subject: [Bug target/86263] New: [nvptx] casesi, tablejump
Date: Thu, 21 Jun 2018 10:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86263
Bug ID: 86263
Summary: [nvptx] casesi, tablejump
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
CC: marxin at gcc dot gnu.org, vries at gcc dot gnu.org
Target Milestone: ---
Target: nvptx
As of trunk r261793 "Switch other switch expansion methods into classes"
(Martin CCed, but this might have been a latent bug already?) GCC for nvptx
target fails to build its target libraries: "internal compiler error: in
emit_case_dispatch_table, at stmt.c:851". That's emit_case_dispatch_table
complaining that neither casesi or tablejump are implemented for nvptx, which
is documented there as a requirement (is that for this code patch only, now
taken erroneously?):
First we try "casesi". If that
fails, try "tablejump". A target *must* have one of them (or both).
>From gcc-bugs-return-607862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 10:12:36 2018
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Subject: [Bug other/86198] Libbacktrace does not properly work with ".note.gnu.build-id" section
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Denis Khalikov <d.khalikov at partner dot samsung.com> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #5 from Denis Khalikov <d.khalikov at partner dot samsung.com> ---
Fixed on trunk.
>From gcc-bugs-return-607863-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 10:19:00 2018
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Subject: [Bug c++/86252] Abstract class in function return type
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to zhonghao from comment #0)
> Will g++ catch up the so-called rule change?
Yes, but failure to implement a rule that only changed two weeks ago is not a
bug, the updated working draft is not even published yet.
https://wg21.link/p0929r2
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Subject: [Bug c++/86254] g++ rejects legal code?
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-21
Ever confirmed|0 |1
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Subject: [Bug c++/86255] addition of default argument on redeclaration makes this constructor a default constructor
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2018-06-21
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Subject: [Bug target/82092] [8/9 regression] gcc fails to link genmodes on darwin (cfiStartsArray[i] != cfiStartsArray[i-1])
Date: Thu, 21 Jun 2018 10:27:00 -0000
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--- Comment #16 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Ryan Schmidt from comment #15)
> Yes, I noticed Homebrew had the update, and I didn't understand why it
> worked there. But now I do.
>
> Some more information has turned up in a new MacPorts ticket:
>
> https://trac.macports.org/ticket/56521
>
> In MacPorts gcc ports, we use --with-as=/opt/local/bin/as (this assembler is
> provided by our cctools port). This change was made in MacPorts 6 years ago
> by Jeremy who reported this bug, though I'm not entirely sure why.
>
> I suspect the problem is that our cctools port is currently at version 895,
> which corresponds to what's in Xcode 8.1, and that's apparently too old to
> work properly in this case. I am able to get a more recent snapshot to build
> if I instead use --with-as=/usr/bin/as, so perhaps we either need to do that
> in MacPorts or we need to update our cctools port to a more recent version.
Please let us know how your update goes!
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Subject: [Bug c++/86251] legal or illegal code?
Date: Thu, 21 Jun 2018 10:35:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86251] legal or illegal code?
Date: Thu, 21 Jun 2018 10:36:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this is a duplicate but I can't find it now.
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Subject: [Bug c++/66670] "template argument deduction/substitution failed" with function pointers and multiple parameter packs
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Subject: [Bug c++/66670] "template argument deduction/substitution failed" with function pointers and multiple parameter packs
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Clang bug: https://bugs.llvm.org/show_bug.cgi?id=23949
>From gcc-bugs-return-607871-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 10:39:02 2018
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Subject: [Bug c++/86250] addition of default argument on redeclaration makes this constructor a default constructor
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>From gcc-bugs-return-607872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 10:43:45 2018
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Subject: [Bug c++/29027] template conversion specialization found by using declaration
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Clang also accepts the code. EDG rejects it.
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Subject: [Bug c++/86249] declaration conflicts with target of using declaration already in scope
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Possibly related to Bug 84589
>From gcc-bugs-return-607874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 10:47:38 2018
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Subject: [Bug c++/86246] [8/9 Regression] Template dispatching error inside a template function
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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Subject: [Bug tree-optimization/79920] [6 Regression] Incorrect floating point results when compiling with -O3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79920
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
Known to fail| |6.4.0
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607875-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 11:19:32 2018
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Subject: [Bug target/82108] [7 Regression] Wrong vectorized code generated for x86_64
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82108
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 21 11:18:50 2018
New Revision: 261842
URL: https://gcc.gnu.org/viewcvs?rev=261842&root=gcc&view=rev
Log:
2018-06-21 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-09-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/82108
* tree-vect-stmts.c (vectorizable_load): Fix pointer adjustment
for gap in the non-permutation SLP case.
* gcc.dg/vect/pr82108.c: New testcase.
2017-06-18 Richard Biener <rguenther@suse.de>
PR tree-optimization/81410
* tree-vect-stmts.c (vectorizable_load): Properly adjust for
the gap in the ! slp_perm SLP case after each group.
* gcc.dg/vect/pr81410.c: New testcase.
2017-03-08 Richard Biener <rguenther@suse.de>
PR tree-optimization/79920
* tree-vect-slp.c (vect_create_mask_and_perm): Remove and inline
with ncopies == 1 to ...
(vect_transform_slp_perm_load): ... here. Properly compute
all element loads by iterating VF times over the group. Do
not handle ncopies (computed in a broken way) in
vect_create_mask_and_perm.
* gcc.dg/vect/pr79920.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/vect/pr79920.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/vect/pr81410.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/vect/pr82108.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-vect-slp.c
branches/gcc-6-branch/gcc/tree-vect-stmts.c
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Subject: [Bug tree-optimization/79920] [6 Regression] Incorrect floating point results when compiling with -O3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79920
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 21 11:18:50 2018
New Revision: 261842
URL: https://gcc.gnu.org/viewcvs?rev=261842&root=gcc&view=rev
Log:
2018-06-21 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-09-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/82108
* tree-vect-stmts.c (vectorizable_load): Fix pointer adjustment
for gap in the non-permutation SLP case.
* gcc.dg/vect/pr82108.c: New testcase.
2017-06-18 Richard Biener <rguenther@suse.de>
PR tree-optimization/81410
* tree-vect-stmts.c (vectorizable_load): Properly adjust for
the gap in the ! slp_perm SLP case after each group.
* gcc.dg/vect/pr81410.c: New testcase.
2017-03-08 Richard Biener <rguenther@suse.de>
PR tree-optimization/79920
* tree-vect-slp.c (vect_create_mask_and_perm): Remove and inline
with ncopies == 1 to ...
(vect_transform_slp_perm_load): ... here. Properly compute
all element loads by iterating VF times over the group. Do
not handle ncopies (computed in a broken way) in
vect_create_mask_and_perm.
* gcc.dg/vect/pr79920.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/vect/pr79920.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/vect/pr81410.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/vect/pr82108.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-vect-slp.c
branches/gcc-6-branch/gcc/tree-vect-stmts.c
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Subject: [Bug tree-optimization/81410] [6 Regression] -O3 breaks code
Date: Thu, 21 Jun 2018 11:19:00 -0000
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--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 21 11:18:50 2018
New Revision: 261842
URL: https://gcc.gnu.org/viewcvs?rev=261842&root=gcc&view=rev
Log:
2018-06-21 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-09-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/82108
* tree-vect-stmts.c (vectorizable_load): Fix pointer adjustment
for gap in the non-permutation SLP case.
* gcc.dg/vect/pr82108.c: New testcase.
2017-06-18 Richard Biener <rguenther@suse.de>
PR tree-optimization/81410
* tree-vect-stmts.c (vectorizable_load): Properly adjust for
the gap in the ! slp_perm SLP case after each group.
* gcc.dg/vect/pr81410.c: New testcase.
2017-03-08 Richard Biener <rguenther@suse.de>
PR tree-optimization/79920
* tree-vect-slp.c (vect_create_mask_and_perm): Remove and inline
with ncopies == 1 to ...
(vect_transform_slp_perm_load): ... here. Properly compute
all element loads by iterating VF times over the group. Do
not handle ncopies (computed in a broken way) in
vect_create_mask_and_perm.
* gcc.dg/vect/pr79920.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/vect/pr79920.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/vect/pr81410.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/vect/pr82108.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-vect-slp.c
branches/gcc-6-branch/gcc/tree-vect-stmts.c
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Subject: [Bug tree-optimization/81410] [6 Regression] -O3 breaks code
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.4.1
Resolution|--- |FIXED
--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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From: "franke at computer dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Thu, 21 Jun 2018 11:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86138
--- Comment #13 from Christian Franke <franke at computer dot org> ---
This patch prevents duplicate _S_empty_rep_storage[] even on Cygwin (char only,
wchar_t missing). Testcase works as expected then:
--- basic_string.tcc.orig 2018-05-03 06:22:46.000000000 +0200
+++ basic_string.tcc 2018-06-21 13:00:03.370070700 +0200
@@ -1597,7 +1597,8 @@
// Inhibit implicit instantiations for required instantiations,
// which are defined via explicit instantiations elsewhere.
-#if _GLIBCXX_EXTERN_TEMPLATE > 0 && __cplusplus <= 201402L
+#if _GLIBCXX_EXTERN_TEMPLATE > 0
+#if __cplusplus <= 201402L
extern template class basic_string<char>;
extern template
basic_istream<char>&
@@ -1627,6 +1628,12 @@
basic_istream<wchar_t>&
getline(basic_istream<wchar_t>&, wstring&);
#endif
+
+#else
+ extern template
+ basic_string<char>::size_type
+ basic_string<char>::_Rep::_S_empty_rep_storage[];
+#endif
#endif
On Linux and other platforms using ELF the problem does not occur because
template static data members use the GNU extension ".type ...
@gnu_unique_object" (nm command prints 'u').
Are there possibly other platforms affected?
For example:
- ELF based platforms were dynamic linker does not support this GNU extension,
or
- non ELF based platforms without a similar feature.
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86246] [8/9 Regression] Template dispatching error inside a template function
Date: Thu, 21 Jun 2018 11:22:00 -0000
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--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
This no longer ices. and I am not sure the code is well formed. The code is
explicitly naming a conversion operator 'obj.operator T()', which is not the
same as relying on the conversion mechanism of 'static_cast <T> (obj)'. do we
perform the lookup at template-definition time (using 'T'), or do we defer to
instantiation time and use 'double'.
If you want to specialize 'operator T' for T == double, provide an explicit
specialization:
template<>
MyClass::operator double () const
{
return 2;
}
(this has to be outside the class definition, because thems the rules on
specializations). That compiles without error.
The rules for when naming a conversion operator finds just set using those
names is not the clearest, and I could be wrong. I know we get things like
'operator auto () const {return 1;} wrong -- that remains 'operator auto', it
doesn;t turn into 'operator int'.
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Subject: [Bug tree-optimization/86232] [9 Regression] ICE in record_estimate, at tree-ssa-loop-niter.c:3258
Date: Thu, 21 Jun 2018 11:22:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jun 21 11:22:12 2018
New Revision: 261843
URL: https://gcc.gnu.org/viewcvs?rev=261843&root=gcc&view=rev
Log:
2018-06-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/86232
* tree-ssa-loop-niter.c (number_of_iterations_popcount): Adjust
max for constant niter.
* gcc.dg/torture/pr86232.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr86232.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-loop-niter.c
>From gcc-bugs-return-607883-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 11:26:37 2018
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Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Thu, 21 Jun 2018 11:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86138
--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #8)
> If Cygwin doesn't correctly ensure uniqueness of static objects across DLLs
> then we can't workaround that,
Oops, typo, I meant to say we *can* work around that.
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Subject: [Bug libstdc++/86138] C++17: getline(istream, string) crashes on Cygwin because incompatible C++14 function is called
Date: Thu, 21 Jun 2018 11:28:00 -0000
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--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Christian Franke from comment #13)
> This patch prevents duplicate _S_empty_rep_storage[] even on Cygwin (char
> only, wchar_t missing). Testcase works as expected then:
>
> --- basic_string.tcc.orig 2018-05-03 06:22:46.000000000 +0200
> +++ basic_string.tcc 2018-06-21 13:00:03.370070700 +0200
> @@ -1597,7 +1597,8 @@
>
> // Inhibit implicit instantiations for required instantiations,
> // which are defined via explicit instantiations elsewhere.
> -#if _GLIBCXX_EXTERN_TEMPLATE > 0 && __cplusplus <= 201402L
> +#if _GLIBCXX_EXTERN_TEMPLATE > 0
> +#if __cplusplus <= 201402L
> extern template class basic_string<char>;
> extern template
> basic_istream<char>&
> @@ -1627,6 +1628,12 @@
> basic_istream<wchar_t>&
> getline(basic_istream<wchar_t>&, wstring&);
> #endif
> +
> +#else
> + extern template
> + basic_string<char>::size_type
> + basic_string<char>::_Rep::_S_empty_rep_storage[];
> +#endif
> #endif
This will only work for the old ABI, if you compile with
_GLIBCXX_USE_CXX11_ABI=1 those declarations are invalid.
But I like the basic idea, that will ensure that the part that must be unique
is unique, but the member functions that are C++17-only will still be
implicitly instantiated as needed.
I'll prepare a complete and correct version of this patch.
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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/86263] [9 Regression] [nvptx] casesi, tablejump
Date: Thu, 21 Jun 2018 11:32:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-06-21
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Summary|[nvptx] casesi, tablejump |[9 Regression] [nvptx]
| |casesi, tablejump
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Mine, I wrongly ported following function:
https://github.com/gcc-mirror/gcc/blob/44511ab2471c1f88b755a5b0998fc47a8653d8c2/gcc/tree-switch-conversion.c#L1297
static bool
expand_switch_as_decision_tree_p (tree range,
unsigned int uniq ATTRIBUTE_UNUSED,
unsigned int count)
{
int max_ratio;
/* If neither casesi or tablejump is available, or flag_jump_tables
over-ruled us, we really have no choice. */
if (!targetm.have_casesi () && !targetm.have_tablejump ())
return true;
if (!flag_jump_tables)
return true;
#ifndef ASM_OUTPUT_ADDR_DIFF_ELT
if (flag_pic)
return true;
#endif
...
>From gcc-bugs-return-607886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 11:36:49 2018
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86264] New: [ARM] unsupported v2/v3 code remaining
Date: Thu, 21 Jun 2018 11:36:00 -0000
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Bug ID: 86264
Summary: [ARM] unsupported v2/v3 code remaining
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
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As discussed in https://gcc.gnu.org/ml/gcc-patches/2018-06/msg01290.html, there
is some code for arm v2/v3 still present while we dropped support for these old
architectures a while ago.
I've noticed:
include/longlong.h
libffi/src/arm/sysv.S
Since the latter belongs to a separate project, it's not immediately clear if
we can drop this support or if they want to keep supporting older GCC releases.
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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/86232] [9 Regression] ICE in record_estimate, at tree-ssa-loop-niter.c:3258
Date: Thu, 21 Jun 2018 11:42:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-607888-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 11:47:27 2018
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Subject: [Bug c++/86256] Lambda will not add ref count for class intelligent pointer member when capture 'this' or & as argument
Date: Thu, 21 Jun 2018 11:47:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
N.B. GCC 5.4 is no longer supported or maintained.
I don't understand your bug report, GCC is compiling the code correctly.
What do you think should happen?
>From gcc-bugs-return-607889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 11:59:17 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/86265] New: Wrong code on an invalid code starting with r255790
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Bug ID: 86265
Summary: Wrong code on an invalid code starting with r255790
Product: gcc
Version: unknown
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Priority: P3
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Starting from the mentioned revision we do:
$ cat tester.c
#include <stdio.h>
#include <string.h>
#define min(a, b) (((a) < (b)) ? (a) : (b))
struct S {
char data[4];
char fallout[100];
};
int main(int argc, char **argv) {
struct S s;
strncpy(s.data, argv[1], 4 + 100);
int length = min(strlen(s.data), 4);
printf("length: %d\n", length);
return 0;
}
$ gcc tester.c -O3 && ./a.out 123456
length: 6
before the mentioned revision we did:
length: 4.
optimized dumps:
after revision:
;; Function main (main, funcdef_no=11, decl_uid=2580, cgraph_uid=11,
symbol_order=11) (executed once)
main (int argc, char * * argv)
{
struct S s;
char * _1;
long unsigned int _2;
int iftmp.0_3;
<bb 2> [local count: 1073741825]:
_1 = MEM[(char * *)argv_4(D) + 8B];
strncpy (&s.data, _1, 104);
_2 = strlen (&s.data);
iftmp.0_3 = (int) _2;
printf ("length: %d\n", iftmp.0_3);
s ={v} {CLOBBER};
return 0;
}
before:
;; Function main (main, funcdef_no=11, decl_uid=2580, cgraph_uid=11,
symbol_order=11) (executed once)
main (int argc, char * * argv)
{
struct S s;
char * _1;
long unsigned int _2;
int iftmp.0_3;
long unsigned int _10;
<bb 2> [local count: 1073741825]:
_1 = MEM[(char * *)argv_4(D) + 8B];
strncpy (&s.data, _1, 104);
_2 = strlen (&s.data);
if (_2 <= 3)
goto <bb 4>; [50.00%]
else
goto <bb 3>; [50.00%]
<bb 3> [local count: 536870913]:
<bb 4> [local count: 1073741825]:
# _10 = PHI <_2(2), 4(3)>
iftmp.0_3 = (int) _10;
printf ("length: %d\n", iftmp.0_3);
s ={v} {CLOBBER};
return 0;
}
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86265] Wrong code on an invalid code starting with r255790
Date: Thu, 21 Jun 2018 12:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86265
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
It's invalid because we properly identify that strlen (s.data) <= 4, thus no
check is needed.
>From gcc-bugs-return-607891-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 12:45:54 2018
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/85859] [6/7/8/9 Regression] wrong code with -fno-isolate-erroneous-paths-dereference
Date: Thu, 21 Jun 2018 12:45:00 -0000
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--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Thu Jun 21 12:44:38 2018
New Revision: 261844
URL: https://gcc.gnu.org/viewcvs?rev=261844&root=gcc&view=rev
Log:
[tail-merge] Fix side-effect test in stmt_local_def
2018-06-21 Tom de Vries <tdevries@suse.de>
PR tree-optimization/85859
* tree-ssa-tail-merge.c (stmt_local_def): Copy gimple_is_call
test with comment from bb_no_side_effects_p.
* gcc.dg/pr85859.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr85859.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-tail-merge.c
>From gcc-bugs-return-607892-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 12:47:50 2018
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Subject: [Bug target/86264] [ARM] unsupported v2/v3 code remaining
Date: Thu, 21 Jun 2018 12:47:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-21
CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed. We should remove what we can for GCC 9
>From gcc-bugs-return-607893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 12:50:12 2018
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Subject: [Bug tree-optimization/86265] Wrong code on an invalid code starting with r255790
Date: Thu, 21 Jun 2018 12:50:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2018-06-21
Resolution|INVALID |---
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #1)
> It's invalid because we properly identify that strlen (s.data) <= 4, thus no
> check is needed.
No, we can't conclude that. See PR86259.
>From gcc-bugs-return-607894-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 12:51:30 2018
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Subject: [Bug tree-optimization/86265] Wrong code on an invalid code starting with r255790
Date: Thu, 21 Jun 2018 12:51:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Duplicate even.
*** This bug has been marked as a duplicate of bug 86259 ***
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Subject: [Bug tree-optimization/86259] [8/9 Regression] min(4, strlen(s)) optimized to strlen(s) with -flto
Date: Thu, 21 Jun 2018 12:51:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 86265 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-607897-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 13:09:52 2018
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From: "kretz at kde dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/86267] New: detect conversions between bitmasks and vector masks
Date: Thu, 21 Jun 2018 13:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86267
Bug ID: 86267
Summary: detect conversions between bitmasks and vector masks
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
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Testcase (cf. https://godbolt.org/g/gi6f7V):
#include <x86intrin.h>
auto f(__m256i a, __m256i b) {
__m256i k = a < b;
long long bitmask = _mm256_movemask_pd((__m256d)k) & 0xf;
return _mm256_cmpgt_epi64(
__m256i{bitmask, bitmask, bitmask, bitmask} & __m256i{1, 2, 4, 8},
__m256i()
);
}
This should be optimized to "return a < b;".
A more complex case also allows conversion of the vector mask (cf.
https://godbolt.org/g/FLAEgC):
#include <x86intrin.h>
auto f(__m256i a, __m256i b) {
using V [[gnu::vector_size(16)]] = int;
__m256i k = a < b;
int bitmask = _mm256_movemask_pd((__m256d)k) & 0xf;
return (V{bitmask, bitmask, bitmask, bitmask} & V{1, 2, 4, 8}) != 0;
}
I believe the most portable and readable strategy would be to introduce new
builtins that convert between bitmasks and vector masks. (This can be
especially helpful with AVX512, where the builtin comparison operators return
vector masks, but Intel intrinsics require bitmasks.)
E.g.:
using W [[gnu::vector_size(32)]] = long long;
using V [[gnu::vector_size(16)]] = int;
V f(W a, W b) {
unsigned bitmask = __builtin_vector_to_bitmask(a < b);
return __builtin_bitmask_to_vector(bitmask, V);
}
I'd define __builtin_vector_to_bitmask to only consider the MSB of each
element. And, to make optimization simpler, consider all remaining input bits
to be whatever the canonical mask representation on the target system is.
>From gcc-bugs-return-607896-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 13:09:52 2018
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug regression/86266] New: [6 regression] r261799 causes failure on gcc.dg/tree-ssa/ssa-dse-16.c
Date: Thu, 21 Jun 2018 13:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86266
Bug ID: 86266
Summary: [6 regression] r261799 causes failure on
gcc.dg/tree-ssa/ssa-dse-16.c
Product: gcc
Version: 6.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: regression
Assignee: unassigned at gcc dot gnu.org
Reporter: clyon at gcc dot gnu.org
Target Milestone: ---
Hi,
Since r261799, I've noticed:
FAIL: gcc.dg/tree-ssa/ssa-dse-16.c scan-tree-dump dse1 "Deleted dead store"
on arm and aarch64
This commit contains a series of backports, I don't know which one introduced
the regression.
>From gcc-bugs-return-607898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 13:18:49 2018
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86246] [8/9 Regression] Template dispatching error inside a template function
Date: Thu, 21 Jun 2018 13:18:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Nathan Sidwell from comment #2)
> This no longer ices. and I am not sure the code is well formed. The code
> is explicitly naming a conversion operator 'obj.operator T()', which is not
> the same as relying on the conversion mechanism of 'static_cast <T> (obj)'.
> do we perform the lookup at template-definition time (using 'T'), or do we
> defer to instantiation time and use 'double'.
I think [temp.mem] is reasonably clear about this:
6 A specialization of a conversion function template is not found by name
lookup. Instead, any conversion function templates visible in the context of
the use are considered. For each such operator, if argument deduction succeeds
(17.9.2.3), the resulting specialization is used as if found by name lookup.
This sounds to me like we should defer to instantiation time.
>From gcc-bugs-return-607899-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 13:35:24 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 regression/86266] [6 regression] r261799 causes failure on gcc.dg/tree-ssa/ssa-dse-16.c
Date: Thu, 21 Jun 2018 13:35:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
There was an accidentially committed hunk which I've reverted (and later
re-applied with the correct dependences).
>From gcc-bugs-return-607900-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 13:47:11 2018
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86192] A not fully fixed bug?
Date: Thu, 21 Jun 2018 13:47:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #2)
> Author: jason
> Date: Tue Jun 19 18:46:51 2018
> New Revision: 261757
>
> URL: https://gcc.gnu.org/viewcvs?rev=261757&root=gcc&view=rev
> Log:
> PR c++/86192 - ICE with anonymous union passed to template.
>
> * pt.c (tsubst_expr) [DECL_EXPR]: Handle an anonymous union type
> used to declare a named variable.
Oops, that should have been bug 86182.
>From gcc-bugs-return-607901-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 13:51:49 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86268] New: [9.0] Error on correct code with PDTs
Date: Thu, 21 Jun 2018 13:51:00 -0000
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Bug ID: 86268
Summary: [9.0] Error on correct code with PDTs
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The following code adapted from a code example posted on the Intel forum here
(with an obvious programming error there):
https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/780677
ifort and nagfor compile and run this with the expected result (1), but
gfortran 9.0 trunk stumbles with the error message:
$ gfortran pdt2.f90
pdt2.f90:12:13:
Procedure, Pass :: suba
1
Error: Argument 'this' of 'suba' with PASS(this) at (1) must be of the
derived-type 'myvec_int'
Module testmod
Private
Type, Public, abstract :: myroot(k)
Integer, kind :: k
End type myroot
Type, Public, extends(myroot), abstract :: myvec
Integer(kind=8) :: lb1=1,ub1
End type myvec
Type, Public, extends(myvec) :: myvec_int
Integer(k), allocatable :: val(:,:)
contains
Procedure, Pass :: suba
End type myvec_int
contains
! Interface
!Module
Subroutine suba (this)
class(myvec_int(8)), Intent(inout) :: this
end Subroutine suba
!end Interface
End Module testmod
Program Test
use testmod
Implicit none
Type(myvec_int(8)), allocatable :: a
allocate(a)
write(*,*) a%lb1
End Program Test
>From gcc-bugs-return-607902-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 14:01:57 2018
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Subject: [Bug libstdc++/70940] pmr::resource_adaptor requires optional allocator requirements and incorrectly aligns returned pointers.
Date: Thu, 21 Jun 2018 14:01:00 -0000
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Jun 21 14:01:11 2018
New Revision: 261849
URL: https://gcc.gnu.org/viewcvs?rev=261849&root=gcc&view=rev
Log:
PR libstdc++/70940 make pmr::resource_adaptor return aligned memory
PR libstdc++/70940
* include/experimental/memory_resource (__resource_adaptor_common):
New base class.
(__resource_adaptor_common::_AlignMgr): Helper for obtaining aligned
pointer from unaligned, and vice versa.
(__resource_adaptor_imp::do_allocate): Use _AlignMgr to adjust
allocated pointer to meet alignment request.
(__resource_adaptor_imp::do_deallocate): Use _AlignMgr to retrieve
original pointer for deallocation.
(__resource_adaptor_imp::do_is_equal): Reformat.
(__resource_adaptor_imp::_S_aligned_size): Remove.
(__resource_adaptor_imp::_S_supported): Remove.
(new_delete_resource): Use __gnu_cxx::new_allocator.
* testsuite/experimental/memory_resource/resource_adaptor.cc: Test
extended alignments and use debug_allocator to check for matching
allocate/deallocate pairs.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/experimental/memory_resource
trunk/libstdc++-v3/testsuite/experimental/memory_resource/resource_adaptor.cc
>From gcc-bugs-return-607903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 14:09:00 2018
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From: "h2+bugs at fsfe dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86269] New: ICE with intermediate concepts notation
Date: Thu, 21 Jun 2018 14:08:00 -0000
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Bug ID: 86269
Summary: ICE with intermediate concepts notation
Product: gcc
Version: c++-concepts
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The following small example which is valid according to the current draft
standard (not just the Concepts TS, with the exception of the bool keyword):
#include <type_traits>
template <typename t2, typename t = std::remove_reference_t<t2>>
concept bool IntegralOrIntegralRef = std::is_integral_v<t>;
template <IntegralOrIntegralRef t>
auto foo(t && v)
{
return v;
}
int main()
{
int i = 7;
return foo(i);
}
produces:
% g++7 -std=c++17 -fconcepts test.cpp
test.cpp:6:11: internal compiler error: in tsubst, at cp/pt.c:13657
template <IntegralOrIntegralRef t>
^~~~~~~~~~~~~~~~~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Checked versions:
g++7 (FreeBSD Ports Collection) 7.3.1 20180607
g++8 (FreeBSD Ports Collection) 8.1.1 20180615
g++9 (FreeBSD Ports Collection) 9.0.0 20180610 (experimental)
Thanks for your work on GCC!
>From gcc-bugs-return-607904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 14:12:21 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 libstdc++/70940] pmr::resource_adaptor requires optional allocator requirements and incorrectly aligns returned pointers.
Date: Thu, 21 Jun 2018 14:12:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Eric Fiselier from comment #0)
> Furthermore it seems that do_allocate returns ill-aligned pointers. It seems
> that do_allocate(s, a) returns the pointers from
> 'Allocator<char>.allocate(...)' directly even though they have no alignment
> guarantees.
Fixed by allocating a buffer with additional space. The returned pointer is
adjusted to the next alignment boundary, and a token is stored at the end of
the allocated buffer to allow removing the adjustment to retrieve the original
pointer for deallocation.
(In reply to Jonathan Wakely from comment #1)
> __null_memory_resource doesn't need to be a class template.
Fixed by using a local class.
> new_delete_resource() returns something that:
> - doesn't have the required is_equal() behaviour.
> - only uses new/delete if std::allocator uses __gnu_cxx::new_allocator.
Fixed by using new_allocator directly.
> And another one from Eric:
> Your new_delete_resource() also unnecessarily pads the allocation size
> before invoking ::operator new, but that isn't a real bug.
I'm not going to fix that for the TS. Without C++17's aligned new we can't rely
on calling new/delete directly (at least not for extended alignments). Going
via resource_adaptor<__gnu_cxx::new_allocator> gives us the alignment
guarantees, at the expense of some extra padding. I considered adding
specialization to resource_adaptor so that when using new_allocator (or
std::allocator when that uses new_allocator) it would avoid doing the padding
for fundamental alignments. Maybe at a later date.
For C++17's std::pmr::new_delete_resource() we can just use aligned new
directly and don't need to wrap new_allocator<char> and over-allocate (and if
the user uses -fno-aligned-new they don't get a new_delete_resource).
Closing as fixed on trunk.
>From gcc-bugs-return-607905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 14:22:01 2018
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Subject: [Bug lto/86175] LTO code generator does not respect ld -u option to force symbol inclusion in the link product
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86175
--- Comment #5 from zenith432 at users dot sourceforge.net ---
This is a bug in ld.bfd. It's setting the resolution for entry symbols to
LDPR_PREVAILING_DEF_IRONLY_EXP instead of LDPR_PREVAILING_DEF. gold handles
them right.
I posted a patch in the sourceware bugzilla linked above at comment 3.
>From gcc-bugs-return-607906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 14:22:48 2018
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Subject: [Bug middle-end/86261] [8/9 Regression] incorrect -Wformat-truncation warning
Date: Thu, 21 Jun 2018 14:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86261
Andreas Stieger <astieger at suse dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |astieger at suse dot com
--- Comment #1 from Andreas Stieger <astieger at suse dot com> ---
(In reply to Richard Biener from comment #0)
> I don't really see how this can print 60 bytes as the integers are limited.
printf("02d", INT_MAX) is "2147483647" of length 10, times 6x%d is 60.
>From gcc-bugs-return-607908-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jun 21 14:23:57 2018
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86182] [8/9 Regression] gcc crashes when compiling the code
Date: Thu, 21 Jun 2018 14:23:00 -0000
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Jun 21 14:23:19 2018
New Revision: 261850
URL: https://gcc.gnu.org/viewcvs?rev=261850&root=gcc&view=rev
Log:
PR c++/86182 - ICE with anonymous union passed to template.
* pt.c (tsubst_expr) [DECL_EXPR]: Handle an anonymous union type
used to declare a named variable.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/template/anonunion3.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/pt.c
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Subject: [Bug middle-end/86260] New: [8/9 Regression] incorrect -Wformat-truncation warning
Date: Thu, 21 Jun 2018 14:23:00 -0000
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Bug ID: 86260
Summary: [8/9 Regression] incorrect -Wformat-truncation warning
Product: gcc
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#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
struct octet_string {
char *data;
size_t length;
};
static int time2generalizedtime(time_t t, struct octet_string *s, int gtimep)
{
struct tm *tm = NULL;
const size_t len = gtimep ? 15 : 13;
s->data = malloc(len + 1);
if (s->data == NULL)
return ENOMEM;
s->length = len;
tm = gmtime(&t);
if (gtimep)
snprintf (s->data, len + 1, "%04d%02d%02d%02d%02d%02dZ",
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
else
snprintf (s->data, len + 1, "%02d%02d%02d%02d%02d%02dZ",
tm->tm_year % 100, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
return 0;
}
int main(void)
{
struct octet_string data;
time_t now = time(0);
int rc;
rc = time2generalizedtime(now, &data, 0);
if (rc != 0) {
return 1;
}
return 0;
}
prints (also with -O2 or -O3):
gcc -O -Wall -Werror=format-truncation gcc_snprintf.c
gcc_snprintf.c: In function ‘main’:
gcc_snprintf.c:28:47: error: ‘%02d’ directive output may be truncated writing
between 2 and 11 bytes into a region of size between 0 and 10
[-Werror=format-truncation=]
snprintf (s->data, len + 1, "%02d%02d%02d%02d%02d%02dZ",
^~~~
gcc_snprintf.c:28:10: note: ‘snprintf’ output between 14 and 60 bytes into a
destination of size 14
snprintf (s->data, len + 1, "%02d%02d%02d%02d%02d%02dZ",
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tm->tm_year % 100, tm->tm_mon + 1, tm->tm_mday,
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tm->tm_hour, tm->tm_min, tm->tm_sec);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
I don't really see how this can print 60 bytes as the integers are limited.
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