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* [Bug testsuite/79126] [7 regression] FAIL: gcc.dg/tree-ssa/pr77445-2.c scan-tree-dump thread1 "Jumps threaded: 16"
[not found] <bug-79126-4@http.gcc.gnu.org/bugzilla/>
@ 2017-03-23 9:44 ` ramana at gcc dot gnu.org
0 siblings, 0 replies; only message in thread
From: ramana at gcc dot gnu.org @ 2017-03-23 9:44 UTC (permalink / raw)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79126
Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-23
CC| |ramana at gcc dot gnu.org
Summary|FAIL: |[7 regression] FAIL:
|gcc.dg/tree-ssa/pr77445-2.c |gcc.dg/tree-ssa/pr77445-2.c
|scan-tree-dump thread1 |scan-tree-dump thread1
|"Jumps threaded: 16" |"Jumps threaded: 16"
Ever confirmed|0 |1
--- Comment #4 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Confirmed -this should really be an obvious fix.
Technically a 7 regression but really trivial
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Subject: [Bug testsuite/79126] [7 regression] FAIL: gcc.dg/tree-ssa/pr77445-2.c scan-tree-dump thread1 "Jumps threaded: 16"
Date: Thu, 23 Mar 2017 09:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79126
Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |trivial
>From gcc-bugs-return-558666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 09:49:27 2017
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From: "sirl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/78735] profiledbootstrap with --enable-checking=yes,rtl fails on trunk due to -Werror=strict-overflow
Date: Thu, 23 Mar 2017 09:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78735
--- Comment #1 from Franz Sirl <sirl at gcc dot gnu.org> ---
Can be worked around by bootstrapping with --disable-werror. Last reconfirmed
with trunk r246380. Trunk is at 7.0.1, so --disable-werror is the default right
now.
I guess the only real question is if the profile-based optimization is doing
the right thing here.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/78735] profiledbootstrap with --enable-checking=yes,rtl fails on trunk due to -Werror=strict-overflow
Date: Thu, 23 Mar 2017 09:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78735
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |WONTFIX
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Only vanilla profiledbootstrap is guaranteed to be warning free.
For everything else you must use --disable-werror.
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Subject: [Bug middle-end/63155] [5/6/7 Regression] memory hog
Date: Thu, 23 Mar 2017 09:52:00 -0000
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--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
The plan is to re-write coalescings conflict graph by using SSA-based liveness
queries according to https://hal.inria.fr/inria-00192219
Well, at least I'd like to experiment with that as it might be useful in other
places as well (cost considerations wrt register pressure changes).
Only experiments will show if we trade too much compile-time for the reduction
in memory use (not computing liveness / conflict graph).
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Subject: [Bug tree-optimization/79898] ICE in const_binop, at fold-const.c:1554 on ARM target
Date: Thu, 23 Mar 2017 09:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79898
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Was fixed by Richi's r246002, marking as duplicate.
*** This bug has been marked as a duplicate of bug 79971 ***
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Subject: [Bug target/79971] ICE in const_binop, at fold-const.c:1554 on ARM target with saturated integers
Date: Thu, 23 Mar 2017 09:55:00 -0000
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 79898 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-558671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 10:03:16 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/79776] [7 Regression] ICE on valid code in insert_vi_for_tree, at tree-ssa-structalias.c:2807
Date: Thu, 23 Mar 2017 10:03:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, we first insert_vi_for_tree on the FUNCTION_DECL:
#0 insert_vi_for_tree (t=<function_decl 0x7fffefc4b400 _ZThn8_N1C2fnEPKciPi>,
vi=0x2ba04d0) at ../../gcc/tree-ssa-structalias.c:2806
#1 0x00000000013a1a36 in create_function_info_for (decl=<function_decl
0x7fffefc4b400 _ZThn8_N1C2fnEPKciPi>, name=0x1e3b24b "NULL",
add_id=false, nonlocal_p=true) at ../../gcc/tree-ssa-structalias.c:5666
#2 0x00000000013a77a5 in ipa_pta_execute () at
../../gcc/tree-ssa-structalias.c:7804
#3 0x00000000013a88d9 in (anonymous namespace)::pass_ipa_pta::execute
(this=0x2a6d9d0) at ../../gcc/tree-ssa-structalias.c:8142
#4 0x000000000100973c in execute_one_pass (pass=<opt_pass* 0x2a6d9d0
"pta"(90)>) at ../../gcc/passes.c:2465
and then later reach the same FUNCTION_DECL because it is an alias of another
function:
#0 insert_vi_for_tree (t=<function_decl 0x7fffefc4b400 _ZThn8_N1C2fnEPKciPi>,
vi=0x2ba0750) at ../../gcc/tree-ssa-structalias.c:2806
#1 0x00000000013a6ef4 in associate_varinfo_to_alias (node=<cgraph_node*
0x7fffefc69b80 "_ZThn8_N1C2fnEPKciPi">, data=0x2ba0750)
at ../../gcc/tree-ssa-structalias.c:7620
#2 0x0000000000bcfb2a in cgraph_node::call_for_symbol_thunks_and_aliases
(this=<cgraph_node* 0x7fffefc69b80 "_ZThn8_N1C2fnEPKciPi">, callback=
0x13a6ea0 <associate_varinfo_to_alias(cgraph_node*, void*)>,
data=0x2ba0750, include_overwritable=true, exclude_virtual_thunks=false)
at ../../gcc/cgraph.c:2354
#3 0x0000000000bcfc86 in cgraph_node::call_for_symbol_thunks_and_aliases
(this=<cgraph_node* 0x7fffefc54450 "*.LTHUNK0">, callback=
0x13a6ea0 <associate_varinfo_to_alias(cgraph_node*, void*)>,
data=0x2ba0750, include_overwritable=true, exclude_virtual_thunks=false)
at ../../gcc/cgraph.c:2375
#4 0x0000000000bcfbbc in cgraph_node::call_for_symbol_thunks_and_aliases
(this=<cgraph_node* 0x7fffefc542e0 "fn">, callback=
0x13a6ea0 <associate_varinfo_to_alias(cgraph_node*, void*)>,
data=0x2ba0750, include_overwritable=true, exclude_virtual_thunks=false)
at ../../gcc/cgraph.c:2362
#5 0x00000000013a792b in ipa_pta_execute () at
../../gcc/tree-ssa-structalias.c:7822
Seems we first create a cgraph node for a thunk, later on
cgraph_node::expand_thunk lowers it and clears thunk.thunk_p = false; on it,
then
#6 0x0000000000be4bc0 in cgraph_node::create_clone (this=<cgraph_node*
0x7fffefc54a10 "_ZThn8_N1C2fnEPKciPi">,
new_decl=<function_decl 0x7fffefc4b400 _ZThn8_N1C2fnEPKciPi>, gcov_count=0,
freq=524, update_original=true, redirect_callers=...,
call_duplication_hook=true, new_inlined_to=<cgraph_node* 0x7fffefc54170
"fn2">, args_to_skip=0x0, suffix=0x0) at ../../gcc/cgraphclones.c:430
#7 0x0000000001b91811 in clone_inlined_nodes (e=0x7fffefc6b2d8,
duplicate=true, update_original=true,
overall_size=0x2a2dfc0 <_ZL12overall_size>, freq_scale=524) at
../../gcc/ipa-inline-transform.c:227
#8 0x0000000001b918cc in clone_inlined_nodes (e=0x7fffefc6b2d8,
duplicate=true, update_original=true,
overall_size=0x2a2dfc0 <_ZL12overall_size>, freq_scale=524) at
../../gcc/ipa-inline-transform.c:242
Python Exception <class 'gdb.error'> There is no member or method named
m_vecpfx.:
#9 0x0000000001b9242a in inline_call (e=0x7fffefaccaf8, update_original=true,
new_edges=0x7fffffffdbd0,
overall_size=0x2a2dfc0 <_ZL12overall_size>, update_overall_summary=true,
callee_removed=0x0) at ../../gcc/ipa-inline-transform.c:449
#10 0x0000000001b88599 in inline_small_functions () at
../../gcc/ipa-inline.c:2024
#11 0x0000000001b89903 in ipa_inline () at ../../gcc/ipa-inline.c:2434
creates yet another cgraph_node for the same FUNCTION_DECL. And the above
first insert_vi_for_tree is from the first thunk with cleared thunk_p, and the
latter for the inline clone. Perhaps associate_varinfo_to_alias should ignore
inlining clones?
>From gcc-bugs-return-558672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 10:04:55 2017
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Subject: [Bug target/80088] ICE: declaration and definition of function with __attribute__((target("thumb"))) and inlined assembler, with debug symbols enabled
Date: Thu, 23 Mar 2017 10:04:00 -0000
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--- Comment #4 from Christophe Lyon <clyon at gcc dot gnu.org> ---
I can confirm that Ubuntu's gcc is based on the Linaro one.
And we did backport patches to support target attributes, so it's indeed likely
that it is a Linaro-only issue. I've noticed you have a reported the bug in the
Linaro tracker already, thanks.
>From gcc-bugs-return-558673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 10:05:56 2017
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Subject: [Bug testsuite/79126] [7 regression] FAIL: gcc.dg/tree-ssa/pr77445-2.c scan-tree-dump thread1 "Jumps threaded: 16"
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--- Comment #5 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Was fixed in r244757.
>From gcc-bugs-return-558674-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 10:07:13 2017
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Subject: [Bug target/79480] -O3 and -mfpu=neon produces crashing code on ARM
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--- Comment #5 from ktkachov at gcc dot gnu.org ---
Since code has undefined behaviour there can be no guarantees from the
compiler, regardless of NEON
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Subject: [Bug testsuite/79418] ERROR: gcc.dg/torture/stackalign/builtin-apply-2.c -O0 : syntax error in targe t selector "target arm_hf_eabi || avr-*-* || riscv*-*-*" for "
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
Can this be closed now?
>From gcc-bugs-return-558676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 10:11:00 2017
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Subject: [Bug ipa/79776] [7 Regression] ICE on valid code in insert_vi_for_tree, at tree-ssa-structalias.c:2807
Date: Thu, 23 Mar 2017 10:10:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Well, PTA simply assumes that cgraph_for_symbol_thunks_and_aliases will call
the callback for nodes with different decls. If it's not easy to arrange for
that a "simple" fix would be sth like
Index: gcc/tree-ssa-structalias.c
===================================================================
--- gcc/tree-ssa-structalias.c (revision 246414)
+++ gcc/tree-ssa-structalias.c (working copy)
@@ -7617,7 +7617,15 @@ associate_varinfo_to_alias (struct cgrap
{
if ((node->alias || node->thunk.thunk_p)
&& node->analyzed)
- insert_vi_for_tree (node->decl, (varinfo_t)data);
+ {
+ /* We can run into duplicate decls, so gracefully handle those. */
+ bool existed;
+ varinfo_t &vi = vi_for_tree->get_or_insert (node->decl, &existed);
+ if (existed)
+ gcc_assert (vi == (varinfo_t)data);
+ else
+ vi = (varinfo_t)data;
+ }
return false;
}
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Subject: [Bug ipa/79776] [7 Regression] ICE on valid code in insert_vi_for_tree, at tree-ssa-structalias.c:2807
Date: Thu, 23 Mar 2017 10:17:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Patch doesn't help.
Note IPA PTA is a simple IPA pass running after inlining decisions are
committed to the IL so there shouldn't be any inlining clones around? Oh, and
it does try to handle them:
/* Build the constraints. */
FOR_EACH_DEFINED_FUNCTION (node)
{
varinfo_t vi;
/* Nodes without a body are not interesting. Especially do not
visit clones at this point for now - we get duplicate decls
there for inline clones at least. */
if (!node->has_gimple_body_p () || node->global.inlined_to)
continue;
obviously it doesn't work...
One way would be to, in this loop, only walk over ultimate_alias_target ()
nodes
(hopefully those will be the ones with body...).
@@ -7785,6 +7793,10 @@ ipa_pta_execute (void)
there for inline clones at least. */
if (!node->has_gimple_body_p () || node->global.inlined_to)
continue;
+
+ if (node->ultimate_alias_target () != node)
+ continue;
+
node->get_body ();
gcc_assert (!node->clone_of);
doesn't work either.
So we have the same decl in multiple alias chains?! And multiple times in the
symbol table?
Sth is fishy with cgraph here.
>From gcc-bugs-return-558678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 10:29:02 2017
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Subject: [Bug target/79871] i18n: document placeholders for translators
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--- Comment #3 from ktkachov at gcc dot gnu.org ---
Confirmed.
>From gcc-bugs-return-558679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 10:35:53 2017
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Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
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--- Comment #5 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #4)
> Can you benchmark the 2nd candidate (most appropriate at this stage I think,
> would also fix 77498).
>
> It will cause pessimizations for code that benefits from predictive
> commoning transforms that PRE can do at -O2 because predictive commoning
> doesn't run at -O2.
> The fix for that would be to run predictive commoning at -O2 but in a mode
> that doesn't perform unrolling for example. [even pcom can blow through
> register pressure limits though]
>
> Any other approach to fixing this particular bug cannot be done for GCC 7
> (even this one is quite late ...). So in the end I'd vote for WONTFIX for
> GCC 7.
Sadly it doesn't. Well not quite true, there is a very slight improvement but
we're far from the uplift -fno-code-hoisting provides.
There's maybe more than one bug at play and the reduced testcase only show one.
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Subject: [Bug tree-optimization/80158] New: [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 10:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80158
Bug ID: 80158
Summary: [7 Regression] ICE in all_phi_incrs_profitable
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
CC: wschmidt at gcc dot gnu.org
Target Milestone: ---
Target: i?86-*-*
416.gamess fails to build on x86_64 with -m32 -Ofast -march=bdver2:
/gcc/spec/sb-megrez-head-64-32o-2006/x86_64/install-hack/bin/gfortran -c -o
efpaul.fppized.o -Ofast -march=native -m32 -DSPEC_CPU_LP64
-ffixed-form efpaul.fppized.f
efpaul.fppized.f:2153:72:
* X(IENG),ZQQ,NROT)
1
Warning: Type mismatch in argument 'ibuf' at (1); passed REAL(8) to INTEGER(4)
-Wargument-mismatch]
efpaul.fppized.f:2174:72:
* NINTMX)
1
Warning: Type mismatch in argument 'ibuf' at (1); passed REAL(8) to INTEGER(4)
-Wargument-mismatch]
efpaul.fppized.f:1651:0:
SUBROUTINE DRPAUL(SMAT,TMAT,EPS,EPT,SIJ,TIJ,WRK,VEC,ARRAY,FMO,
internal compiler error: Segmentation fault
0xaf251f crash_signal
/gcc/spec/sb-megrez-head-64-32o-2006/gcc/gcc/toplev.c:337
0x79b22b dominated_by_p(cdi_direction, basic_block_def const*, basic_block_def
const*)
/gcc/spec/sb-megrez-head-64-32o-2006/gcc/gcc/dominance.c:1117
0x11c10c8 all_phi_incrs_profitable
/gcc/spec/sb-megrez-head-64-32o-2006/gcc/gcc/gimple-ssa-strength-reduction.c:3297
0x11c1a81 replace_profitable_candidates
/gcc/spec/sb-megrez-head-64-32o-2006/gcc/gcc/gimple-ssa-strength-reduction.c:3587
0x11c184f replace_profitable_candidates
/gcc/spec/sb-megrez-head-64-32o-2006/gcc/gcc/gimple-ssa-strength-reduction.c:3619
0x11c587a analyze_candidates_and_replace
/gcc/spec/sb-megrez-head-64-32o-2006/gcc/gcc/gimple-ssa-strength-reduction.c:3698
0x11c8783 execute
/gcc/spec/sb-megrez-head-64-32o-2006/gcc/gcc/gimple-ssa-strength-reduction.c:3772
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
This is a recent regression.
>From gcc-bugs-return-558681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 10:43:21 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
Date: Thu, 23 Mar 2017 10:43:00 -0000
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 23 Mar 2017, thopre01 at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80155
>
> --- Comment #5 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #4)
> > Can you benchmark the 2nd candidate (most appropriate at this stage I think,
> > would also fix 77498).
> >
> > It will cause pessimizations for code that benefits from predictive
> > commoning transforms that PRE can do at -O2 because predictive commoning
> > doesn't run at -O2.
> > The fix for that would be to run predictive commoning at -O2 but in a mode
> > that doesn't perform unrolling for example. [even pcom can blow through
> > register pressure limits though]
> >
> > Any other approach to fixing this particular bug cannot be done for GCC 7
> > (even this one is quite late ...). So in the end I'd vote for WONTFIX for
> > GCC 7.
>
> Sadly it doesn't. Well not quite true, there is a very slight improvement but
> we're far from the uplift -fno-code-hoisting provides.
>
> There's maybe more than one bug at play and the reduced testcase only show one.
The testcase shows hardly profitable PRE which the patches should
disable (I didn't verify the patches fix the testcase!)
code-hoisting (as well as CSE) can increase register pressure and neither
transform is register-pressure aware (and the patch doesn't try to
mitigate that).
>From gcc-bugs-return-558682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 10:46:07 2017
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Subject: [Bug fortran/80012] FIXME in diagnostic "%s procedure at %L is already declared as %s procedure" from symbol.c
Date: Thu, 23 Mar 2017 10:46:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-23
CC| |pault at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The error message has been introduced at revision r228222. AFAICT it is not
covered by the test suite. It is triggered by the following test from pr40054
two() = 7
contains
function two ()
integer, pointer :: two
allocate(two)
end function two
end
pr40054_1.f90:3:2:
function two ()
1
Error: INTERNAL-PROC procedure at (1) is already declared as STATEMENT-PROC
procedure.
F2008: A pointer function assignment is ambiguous if it is the first executable
statement after the specification block. Please add any other kind of
executable statement before it. FIXME
Indeed the FIXME looks confusing.
>From gcc-bugs-return-558683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 10:46:49 2017
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 10:46:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
#1 0x00000000019a81e7 in all_phi_incrs_profitable (c=0x2c907b0,
phi=0x7ffff6684400)
at
/space/rguenther/src/svn/gcc-7-branch/gcc/gimple-ssa-strength-reduction.c:3298
3298 || !dominated_by_p (CDI_DOMINATORS, phi_bb, basis_bb))
(gdb) l
3293 using the basis here. */
3294 basic_block basis_bb = gimple_bb (basis->cand_stmt);
3295 basic_block phi_bb = gimple_bb (phi);
3296
3297 if (phi_bb == basis_bb
3298 || !dominated_by_p (CDI_DOMINATORS, phi_bb, basis_bb))
3299 return false;
3300
3301 for (i = 0; i < gimple_phi_num_args (phi); i++)
3302 {
(gdb) p basis_bb
$4 = <basic_block 0x0>
basis->cand_stmt is not in any BB. Reducing testcase...
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 10:47:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Target Milestone|--- |7.0
>From gcc-bugs-return-558685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 11:04:51 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
Date: Thu, 23 Mar 2017 11:04:00 -0000
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--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 23 Mar 2017, thopre01 at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80155
>
> --- Comment #5 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #4)
> > Can you benchmark the 2nd candidate (most appropriate at this stage I think,
> > would also fix 77498).
> >
> > It will cause pessimizations for code that benefits from predictive
> > commoning transforms that PRE can do at -O2 because predictive commoning
> > doesn't run at -O2.
> > The fix for that would be to run predictive commoning at -O2 but in a mode
> > that doesn't perform unrolling for example. [even pcom can blow through
> > register pressure limits though]
> >
> > Any other approach to fixing this particular bug cannot be done for GCC 7
> > (even this one is quite late ...). So in the end I'd vote for WONTFIX for
> > GCC 7.
>
> Sadly it doesn't. Well not quite true, there is a very slight improvement but
> we're far from the uplift -fno-code-hoisting provides.
>
> There's maybe more than one bug at play and the reduced testcase only show one.
If you're benchmarking at -O2 can you add -fpredictive-commoning? As
said, the patch removes important loop optimizations from PRE.
>From gcc-bugs-return-558686-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 11:15:50 2017
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From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
Date: Thu, 23 Mar 2017 11:15:00 -0000
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--- Comment #8 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #6 and #7)
>
> The testcase shows hardly profitable PRE which the patches should
> disable (I didn't verify the patches fix the testcase!)
The patch does not help for the testcase either (at least the Cortex-M7 one).
>
> If you're benchmarking at -O2 can you add -fpredictive-commoning? As
> said, the patch removes important loop optimizations from PRE.
Sorry, it does not make any difference (either for the benchmark or the
testcase).
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
SUBROUTINE DRPAUL(SMAT,TMAT,EPS,EPT,SIJ,TIJ,WRK,VEC,ARRAY,FMO,
* XMKVIR,TMJ,XMI,YMI,ZMI,ZQQ,L1,L1EF,LNA,LNA2,
* NAEF,L2,NLOC,NVIR,PROVEC,FOCKMA,MXBF,MXMO2)
DIMENSION CMO(L1,L1),TLOC(LNA,LNA),SMJ(L1,NAEF),XMK(L1,LNA)
DO I = 1,LNA
DO J = 1,LNA
IF (I.LE.NOUT) TLOC(I,J) = ZERO
IF (J.LE.NOUT) TLOC(I,J) = ZERO
END DO
DO NA=1,NOC
IF ( ABS(E(NI)-E(NA)) .GE.TOL) THEN
END IF
END DO
END DO
END
possibly somewhat nonsensical reduced but it reproduces the issue.
>From gcc-bugs-return-558688-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 11:29:49 2017
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-23
CC| |foreese at gcc dot gnu.org
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
CCed Fritz Reese. I can test a patch if it helps.
>From gcc-bugs-return-558689-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 11:49:03 2017
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Subject: [Bug c++/77772] Segmentation fault when running an application with gdb
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ktkachov at gcc dot gnu.org changed:
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--- Comment #8 from ktkachov at gcc dot gnu.org ---
Looks like this was a GDB issue after all
>From gcc-bugs-return-558690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 11:57:02 2017
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Subject: [Bug ada/80146] [7 regression] ICE in copy_to_mode_reg, at explow.c:612
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Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |67205
Summary|ICE in copy_to_mode_reg, at |[7 regression] ICE in
|explow.c:612 |copy_to_mode_reg, at
| |explow.c:612
--- Comment #7 from Andreas Schwab <schwab@linux-m68k.org> ---
84a95d7fd98a4c0601f2803fc0ab983797eb9ead is the first bad commit
commit 84a95d7fd98a4c0601f2803fc0ab983797eb9ead
Author: ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue Jan 17 18:02:55 2017 +0000
PR ada/67205
* config/aarch64/aarch64.c (TARGET_CUSTOM_FUNCTION_DESCRIPTORS):
Define
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@244543
138bc75d-0d04-0410-961f-82ee72b054a4
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67205
[Bug 67205] eliminate No_Implicit_Dynamic_Code restriction violations
>From gcc-bugs-return-558691-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 12:03:41 2017
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Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ah, the patches do not fix the testcase because the testcase is _not_ the
PRE-creates-IV case. It's indeed simply hoisting/PRE at work transforming
# a_14 = PHI <a_10(, a_5(D)>
if (!b)
a_8 = a_14 + 1;
# a_2 = PHI <a_14(10), a_8(4)>
a_10 = a_2 + 1;
... = *(a_2 + 1);
to
# a_14 = PHI <prephimp_12, a_5(D)>
_4 = a_14 + 1;
if (b)
_3 = _4 + 1;
# a_2 = PHI <a_14, _4>
# prephitmp_12 = PHI <_4, _3>
... = *(a_2 + 1);
increasing register pressure mainly because nothing figures that a_2 + 1
in the dereference can be replaced by prephitmp_12 ...
So this is a missed SLSR opportunity or, in this simple form, a missed
PRE/CSE opportunity. Fixing that with the following (otherwise untested)
restores good code generation for the testcase:
Index: gcc/tree-ssa-pre.c
===================================================================
--- gcc/tree-ssa-pre.c (revision 246414)
+++ gcc/tree-ssa-pre.c (working copy)
@@ -4636,6 +4610,35 @@ eliminate_dom_walker::before_dom_childre
}
}
+ if (gimple_has_ops (stmt))
+ for (unsigned i = 0; i < gimple_num_ops (stmt); ++i)
+ {
+ tree op = gimple_op (stmt, i);
+ if (op)
+ op = get_base_address (op);
+ if (op
+ && TREE_CODE (op) == MEM_REF
+ && ! integer_zerop (TREE_OPERAND (op, 1)))
+ {
+ tree ops[2];
+ vn_nary_op_t nary;
+ ops[0] = TREE_OPERAND (op, 0);
+ ops[1] = TREE_OPERAND (op, 1);
+ tree res = vn_nary_op_lookup_pieces (2, POINTER_PLUS_EXPR,
+ TREE_TYPE (ops[0]),
+ ops, &nary);
+ if (res && TREE_CODE (res) == SSA_NAME)
+ res = eliminate_avail (res);
+ if (res)
+ {
+ TREE_OPERAND (op, 0) = res;
+ TREE_OPERAND (op, 1)
+ = build_int_cst (TREE_TYPE (TREE_OPERAND (op, 1)), 0);
+ gimple_set_modified (stmt, true);
+ }
+ }
+ }
+
if (gimple_modified_p (stmt))
{
/* If a formerly non-invariant ADDR_EXPR is turned into an
note that in general optimzing
q = p + 1;
= ...*(p + 1);
"back" to *q will be undone by forwprop/stmt folding later but in this
case the feeding stmt is a PHI node and not a pointer-plus. It still
means that the change might be a bit too disruptive at this point
(we could restricit it a bit by only handling the case where we don't
replace with a pointer-plus result).
>From gcc-bugs-return-558692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 12:07:00 2017
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Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
Date: Thu, 23 Mar 2017 12:07:00 -0000
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
asm difference -fno-code-hoisting (-) against patch (+) shows
--- t.s 2017-03-23 13:04:11.010514228 +0100
+++ t.s.ok 2017-03-23 13:04:05.882432743 +0100
@@ -26,9 +26,9 @@
ldrb r3, [r4] @ zero_extendqisi2
cbz r3, .L2
.L4:
- bl fn2
- ldrb r3, [r4, #1] @ zero_extendqisi2
adds r4, r4, #1
+ bl fn2
+ ldrb r3, [r4] @ zero_extendqisi2
cmp r3, #0
bne .L4
.L2:
which probably is better as it only keeps r4 live over the call? but
it adds a dependence between the load from r4 and the add.
>From gcc-bugs-return-558693-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 12:16:42 2017
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Subject: [Bug c++/80145] [c++1y] ICE after failed return type deduction
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |paolo.carlini at oracle dot com
--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
>From gcc-bugs-return-558694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 12:39:36 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
Date: Thu, 23 Mar 2017 12:39:00 -0000
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, the 2nd level opportunitues are important. So the 2nd candidate remains
for the loop carried dependencies issue(s). Regresses (on x86_64):
Running target unix/{,-m32}
FAIL: gcc.dg/store-motion-fgcse-sm.c scan-rtl-dump store_motion "STORE_MOTION
of f, .* basic blocks, 1 insns deleted, 1 insns created"
FAIL: gcc.dg/tree-ssa/loadpre10.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre23.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre24.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre25.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre4.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre6.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/pr21417.c scan-tree-dump-times thread4 "FSM jump thread"
1
FAIL: gcc.dg/tree-ssa/pr71347.c scan-tree-dump-not optimized ".* = MEM.*;"
FAIL: gcc.dg/tree-ssa/ssa-pre-23.c scan-tree-dump pre "Eliminated: 3"
FAIL: gcc.target/i386/pr49781-1.c scan-assembler-not lea[lq]?[
\\t]\\\\((%|)r[a-z0-9]*
most of them are expected and looking for the feature we disabled. loadpre6,
pr21417.c and pr49781-1.c need a closer look.
>From gcc-bugs-return-558695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 12:47:41 2017
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Subject: [Bug ipa/80159] New: [7 regression] gcc takes very link time with -Os
Date: Thu, 23 Mar 2017 12:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80159
Bug ID: 80159
Summary: [7 regression] gcc takes very link time with -Os
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
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Created attachment 41032
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41032&action=edit
linux/fs/eventpoll.c, preprocessed, compressed
After upgrading to r246365 and doing a few hundred linux kernel builds, I ran
into one file that apparently never completes the compilation. I've verified
the problem still exists on r246414.
To reproduce with an x86 compiler:
cc1 -m32 -Os -Wall -fno-strict-aliasing -Wno-attributes -Wno-unused-parameter
-Wno-sign-compare -Wno-pointer-sign eventpoll.i
Compilation stops after this output:
Performing interprocedural optimizations
<*free_lang_data> <visibility> <build_ssa_passes> <opt_local_passes>
<targetclone> <free-inline-summary> <whole-program> <profile_estimate> <icf>
<devirt> <cp> <inline> <pure-const> <static-var> <single-use>
<comdats>Assembling functions:
<materialize-all-clones> <simdclone> ep_item_poll epi_rcu_free list_add_tail
ep_ptable_queue_proc __list_del_entry ep_wakeup_source ep_destroy_wakeup_source
ep_poll_wakeup_proc rcu_read_lock rcu_read_unlock clear_tfile_check_list
ep_unregister_pollwait.isra.14 ep_read_events_proc list_add ep_send_events_proc
>From gcc-bugs-return-558697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 12:51:43 2017
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Subject: [Bug rtl-optimization/80025] [5/6/7 Regression] ICE w/ -O2 (-O3, -Ofast) -g -ftracer (infinite recursion in rtx_equal_for_cselib_1)
Date: Thu, 23 Mar 2017 12:51:00 -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 #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So the reason we get so weird locations is we have:
(debug_insn 20 19 21 3 (var_location:DI D#6 (xor:DI (xor:DI (reg:DI 0 ax
[orig:95 l3.6_9 ] [95])
(reg:DI 1 dx [103]))
(const_int 1 [0x1]))) "pr80025.c":22 -1
(nil))
$110 = void
(gdb) p debug_rtx (insn->u.fld[1].rt_rtx)
(insn:TI 21 20 22 3 (parallel [
(set (reg:DI 0 ax [105])
(xor:DI (reg:DI 0 ax [orig:95 l3.6_9 ] [95])
(const_int 1 [0x1])))
(clobber (reg:CC 17 flags))
]) "pr80025.c":22 418 {*xordi_1}
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil)))
and register dx contains (const_int 1). ax before insn 21 change is value
19:19,
value 21:8705 is whatever we've created for the whole debug_insn 20 expression,
with
(xor:DI (xor:DI (value/u:DI 19:19 @0x2920a70/0x2844900)
(value/u:DI 13:4258 @0x29209e0/0x28447e0))
(const_int 1 [0x1]))
loc, where value 13:4258 is that of dx with const_int 1 in it.
The new value of ax after insn 21 is 22:4362, which has
(xor:DI (value/u:DI 19:19 @0x2920a70/0x2844900)
(const_int 1 [0x1]))
as its location. Then as XOR is reversible, we try to create the reverse
mapping for that and for that attempt to permanently equate 19:19 to
(xor:DI (value:DI 22:4362 @0x2920ab8/0x2844990)
(const_int 1 [0x1]))
But during cselib lookup of that expression we find that value 21:8705 has the
same value and thus equate 19:19 to the loc from 21:8705, which is the
self-reference.
>From gcc-bugs-return-558696-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 12:51:33 2017
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Subject: [Bug c++/77563] [5/6/7 Regression] explicit constructor breaks narrowing conversion overload resolution
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--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Mar 23 12:50:55 2017
New Revision: 246417
URL: https://gcc.gnu.org/viewcvs?rev=246417&root=gcc&view=rev
Log:
PR c++/77563 - missing ambiguous conversion error.
* call.c (convert_like_real): Use LOOKUP_IMPLICIT.
Added:
trunk/gcc/testsuite/g++.dg/overload/ambig3.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
>From gcc-bugs-return-558698-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 12:52:34 2017
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Subject: [Bug c++/77563] [5/6 Regression] explicit constructor breaks narrowing conversion overload resolution
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0
Summary|[5/6/7 Regression] explicit |[5/6 Regression] explicit
|constructor breaks |constructor breaks
|narrowing conversion |narrowing conversion
|overload resolution |overload resolution
Known to fail|7.0 |
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-558699-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 12:52:39 2017
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Subject: [Bug rtl-optimization/80159] [7 regression] gcc takes very long time with -Os
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-23
CC| |trippels at gcc dot gnu.org,
| |vmakarov at gcc dot gnu.org
Component|ipa |rtl-optimization
Ever confirmed|0 |1
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Spins in lra_create_live_ranges_1().
>From gcc-bugs-return-558700-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 12:56:45 2017
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Subject: [Bug c++/80150] [6/7 Regression] Internal compiler error when in in try_one_overload, at cp/pt.c:18903
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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
>From gcc-bugs-return-558701-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 13:11:38 2017
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Subject: [Bug tree-optimization/80136] [7 Regression] ICE in gimplify_modify_expr, at gimplify.c:5627
Date: Thu, 23 Mar 2017 13:11:00 -0000
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--- Comment #18 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Thanks, all. I will commit the patch.
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Subject: [Bug tree-optimization/80136] [7 Regression] ICE in gimplify_modify_expr, at gimplify.c:5627
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80136
--- Comment #19 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Thu Mar 23 13:13:44 2017
New Revision: 246418
URL: https://gcc.gnu.org/viewcvs?rev=246418&root=gcc&view=rev
Log:
[gcc]
2017-03-23 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Richard Biener <rguenth@suse.com>
PR tree-optimization/79908
PR tree-optimization/80136
* tree-stdarg.c (expand_ifn_va_arg_1): For a VA_ARG whose LHS has
been cast away, gimplify_and_add suffices.
[gcc/testsuite]
2017-03-23 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Richard Biener <rguenther@suse.de>
PR tree-optimization/79908
PR tree-optimization/80136
* gcc.dg/torture/pr79908.c: New file.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/torture/pr79908.c
trunk/gcc/tree-stdarg.c
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Subject: [Bug tree-optimization/79908] ICE in gimplify_expr (gimplify.c:12155) gimplification failed
Date: Thu, 23 Mar 2017 13:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79908
--- Comment #9 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Thu Mar 23 13:13:44 2017
New Revision: 246418
URL: https://gcc.gnu.org/viewcvs?rev=246418&root=gcc&view=rev
Log:
[gcc]
2017-03-23 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Richard Biener <rguenth@suse.com>
PR tree-optimization/79908
PR tree-optimization/80136
* tree-stdarg.c (expand_ifn_va_arg_1): For a VA_ARG whose LHS has
been cast away, gimplify_and_add suffices.
[gcc/testsuite]
2017-03-23 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Richard Biener <rguenther@suse.de>
PR tree-optimization/79908
PR tree-optimization/80136
* gcc.dg/torture/pr79908.c: New file.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/torture/pr79908.c
trunk/gcc/tree-stdarg.c
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Subject: [Bug tree-optimization/80136] [7 Regression] ICE in gimplify_modify_expr, at gimplify.c:5627
Date: Thu, 23 Mar 2017 13:16:00 -0000
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Bug 80136 depends on bug 79908, which changed state.
Bug 79908 Summary: ICE in gimplify_expr (gimplify.c:12155) gimplification failed
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79908
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug tree-optimization/79908] ICE in gimplify_expr (gimplify.c:12155) gimplification failed
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #10 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Fixed now.
Note: I will be unavailable from 2017-03-24 to 2017-03-27, so if regressions
occur, please revert and I will review upon my return.
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Subject: [Bug tree-optimization/80136] [7 Regression] ICE in gimplify_modify_expr, at gimplify.c:5627
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #20 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-558707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 13:24:53 2017
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 13:24:00 -0000
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--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Richard, what flags are you using with the reduced test case? Hoping I can
reproduce this on ppc64le without a cross, but so far no luck.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80156] [7 Regression] Generic DTIO interface reported missing if public statement preceeds the interface block
Date: Thu, 23 Mar 2017 13:43:00 -0000
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> My bisection shows r245596 as the start of the regression, r245764
> as well as r245768 fails, not passes.
You are right: testing the original code I found the range r245564 (compiles)
r245629 (error). Actually I tested r245767 with the variant which compiles.
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From: "arnd at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80160] New: [7 regression] operand has impossible constraints
Date: Thu, 23 Mar 2017 13:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80160
Bug ID: 80160
Summary: [7 regression] operand has impossible constraints
Product: gcc
Version: 7.0.1
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Created attachment 41033
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41033&action=edit
linux/arch/x86/mm/pageattr.c preprocessed and compressed
I ran into this one at the same time as pr80148, with almost the same symptom
but apparently a different root cause, as this one only shows up with very
recent gcc snapshots. Right now this shows up in two files in the kernel using
the set_64bit helper, this is one of them:
x86_64-linux-gcc-7.0.1 pageattr.i -O2 -Wall -Wno-pointer-sign -Wno-sign-compare
-Wno-unused -fno-strict-aliasing -fno-omit-frame-pointer -march=pentium-mmx
-m32
In file included from /git/arm-soc/arch/x86/include/asm/cmpxchg.h:142:0,
from /git/arm-soc/arch/x86/include/asm/atomic.h:7,
from /git/arm-soc/arch/x86/include/asm/msr.h:66,
from /git/arm-soc/arch/x86/include/asm/processor.h:20,
from /git/arm-soc/arch/x86/include/asm/cpufeature.h:4,
from /git/arm-soc/arch/x86/include/asm/thread_info.h:52,
from /git/arm-soc/include/linux/thread_info.h:25,
from /git/arm-soc/arch/x86/include/asm/preempt.h:6,
from /git/arm-soc/include/linux/preempt.h:80,
from /git/arm-soc/include/linux/spinlock.h:50,
from /git/arm-soc/include/linux/wait.h:8,
from /git/arm-soc/include/linux/fs.h:5,
from /git/arm-soc/include/linux/highmem.h:4,
from /git/arm-soc/arch/x86/mm/pageattr.c:5:
/git/arm-soc/arch/x86/mm/pageattr.c: In function '__change_page_attr_set_clr':
/git/arm-soc/arch/x86/include/asm/cmpxchg_32.h:29:2: error: 'asm' operand has
impossible constraints
asm volatile("\n1:\t"
^~~
The inline assembly in question is defined as
static inline void set_64bit(volatile u64 *ptr, u64 value)
{
u32 low = value;
u32 high = value >> 32;
u64 prev = *ptr;
asm volatile("\n1:\t"
LOCK_PREFIX "cmpxchg8b %0\n\t"
"jnz 1b"
: "=m" (*ptr), "+A" (prev)
: "b" (low), "c" (high)
: "memory");
}
static inline __attribute__((always_inline, unused))
__attribute__((no_instrument_function)) void native_set_pte_atomic(pte_t *ptep,
pte_t pte)
{
set_64bit((unsigned long long *)(ptep), native_pte_val(pte));
}
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Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
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--- Comment #12 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #9)
> Ah, the patches do not fix the testcase because the testcase is _not_ the
> PRE-creates-IV case. It's indeed simply hoisting/PRE at work transforming
>
> # a_14 = PHI <a_10(, a_5(D)>
> if (!b)
> a_8 = a_14 + 1;
>
> # a_2 = PHI <a_14(10), a_8(4)>
> a_10 = a_2 + 1;
> ... = *(a_2 + 1);
>
> to
>
> # a_14 = PHI <prephimp_12, a_5(D)>
> _4 = a_14 + 1;
> if (b)
> _3 = _4 + 1;
>
> # a_2 = PHI <a_14, _4>
> # prephitmp_12 = PHI <_4, _3>
> ... = *(a_2 + 1);
>
> increasing register pressure mainly because nothing figures that a_2 + 1
> in the dereference can be replaced by prephitmp_12 ...
>
> So this is a missed SLSR opportunity or, in this simple form, a missed
> PRE/CSE opportunity. Fixing that with the following (otherwise untested)
> restores good code generation for the testcase:
>
> Index: gcc/tree-ssa-pre.c
> ===================================================================
> --- gcc/tree-ssa-pre.c (revision 246414)
> +++ gcc/tree-ssa-pre.c (working copy)
> @@ -4636,6 +4610,35 @@ eliminate_dom_walker::before_dom_childre
> }
> }
>
> + if (gimple_has_ops (stmt))
> + for (unsigned i = 0; i < gimple_num_ops (stmt); ++i)
> + {
> + tree op = gimple_op (stmt, i);
> + if (op)
> + op = get_base_address (op);
> + if (op
> + && TREE_CODE (op) == MEM_REF
> + && ! integer_zerop (TREE_OPERAND (op, 1)))
> + {
> + tree ops[2];
> + vn_nary_op_t nary;
> + ops[0] = TREE_OPERAND (op, 0);
> + ops[1] = TREE_OPERAND (op, 1);
> + tree res = vn_nary_op_lookup_pieces (2, POINTER_PLUS_EXPR,
> + TREE_TYPE (ops[0]),
> + ops, &nary);
> + if (res && TREE_CODE (res) == SSA_NAME)
> + res = eliminate_avail (res);
> + if (res)
> + {
> + TREE_OPERAND (op, 0) = res;
> + TREE_OPERAND (op, 1)
> + = build_int_cst (TREE_TYPE (TREE_OPERAND (op, 1)), 0);
> + gimple_set_modified (stmt, true);
> + }
> + }
> + }
> +
> if (gimple_modified_p (stmt))
> {
> /* If a formerly non-invariant ADDR_EXPR is turned into an
>
> note that in general optimzing
>
> q = p + 1;
> = ...*(p + 1);
>
> "back" to *q will be undone by forwprop/stmt folding later but in this
> case the feeding stmt is a PHI node and not a pointer-plus. It still
> means that the change might be a bit too disruptive at this point
> (we could restricit it a bit by only handling the case where we don't
> replace with a pointer-plus result).
Thanks for your work on this! Sadly GCC ICEs with this patch:
0xd36f53 update_dep_bb
gcc/tree-ssa-tail-merge.c:411
0xd38f54 stmt_update_dep_bb
gcc/tree-ssa-tail-merge.c:429
0xd38f54 same_succ_hash
gcc/tree-ssa-tail-merge.c:452
0xd38f54 find_same_succ_bb
gcc/tree-ssa-tail-merge.c:717
0xd39927 find_same_succ
gcc/tree-ssa-tail-merge.c:748
0xd39927 init_worklist
gcc/tree-ssa-tail-merge.c:767
0xd39927 tail_merge_optimize(unsigned int)
gcc/tree-ssa-tail-merge.c:1726
0xce2d6a execute
gcc/tree-ssa-pre.c:5164
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 13:52:00 -0000
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 23 Mar 2017, wschmidt at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80158
>
> --- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
> Richard, what flags are you using with the reduced test case? Hoping I can
> reproduce this on ppc64le without a cross, but so far no luck.
-Ofast -m32 -march=bdver2
looks like vectorization is needed to trigger it
>From gcc-bugs-return-558711-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 13:52:49 2017
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Subject: [Bug debug/80025] [5/6/7 Regression] ICE w/ -O2 (-O3, -Ofast) -g -ftracer (infinite recursion in rtx_equal_for_cselib_1)
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41034
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41034&action=edit
gcc7-pr80025.patch
Untested alternate patch.
>From gcc-bugs-return-558713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 13:55:00 2017
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Subject: [Bug debug/80025] [5/6/7 Regression] ICE w/ -O2 (-O3, -Ofast) -g -ftracer (infinite recursion in rtx_equal_for_cselib_1)
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--- Comment #12 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
That still doesn't seem to address the root cause though? Isn't the problem
that this reversible mappings code can create cycles and we should avoid
creating these in the first place?
>From gcc-bugs-return-558714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 14:04:59 2017
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Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
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--- Comment #13 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 23 Mar 2017, thopre01 at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80155
>
> --- Comment #12 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #9)
> > Ah, the patches do not fix the testcase because the testcase is _not_ the
> > PRE-creates-IV case. It's indeed simply hoisting/PRE at work transforming
> >
> > # a_14 = PHI <a_10(, a_5(D)>
> > if (!b)
> > a_8 = a_14 + 1;
> >
> > # a_2 = PHI <a_14(10), a_8(4)>
> > a_10 = a_2 + 1;
> > ... = *(a_2 + 1);
> >
> > to
> >
> > # a_14 = PHI <prephimp_12, a_5(D)>
> > _4 = a_14 + 1;
> > if (b)
> > _3 = _4 + 1;
> >
> > # a_2 = PHI <a_14, _4>
> > # prephitmp_12 = PHI <_4, _3>
> > ... = *(a_2 + 1);
> >
> > increasing register pressure mainly because nothing figures that a_2 + 1
> > in the dereference can be replaced by prephitmp_12 ...
> >
> > So this is a missed SLSR opportunity or, in this simple form, a missed
> > PRE/CSE opportunity. Fixing that with the following (otherwise untested)
> > restores good code generation for the testcase:
> >
> > Index: gcc/tree-ssa-pre.c
> > ===================================================================
> > --- gcc/tree-ssa-pre.c (revision 246414)
> > +++ gcc/tree-ssa-pre.c (working copy)
> > @@ -4636,6 +4610,35 @@ eliminate_dom_walker::before_dom_childre
> > }
> > }
> >
> > + if (gimple_has_ops (stmt))
> > + for (unsigned i = 0; i < gimple_num_ops (stmt); ++i)
> > + {
> > + tree op = gimple_op (stmt, i);
> > + if (op)
> > + op = get_base_address (op);
> > + if (op
> > + && TREE_CODE (op) == MEM_REF
> > + && ! integer_zerop (TREE_OPERAND (op, 1)))
> > + {
> > + tree ops[2];
> > + vn_nary_op_t nary;
> > + ops[0] = TREE_OPERAND (op, 0);
> > + ops[1] = TREE_OPERAND (op, 1);
> > + tree res = vn_nary_op_lookup_pieces (2, POINTER_PLUS_EXPR,
> > + TREE_TYPE (ops[0]),
> > + ops, &nary);
> > + if (res && TREE_CODE (res) == SSA_NAME)
> > + res = eliminate_avail (res);
> > + if (res)
> > + {
> > + TREE_OPERAND (op, 0) = res;
> > + TREE_OPERAND (op, 1)
> > + = build_int_cst (TREE_TYPE (TREE_OPERAND (op, 1)), 0);
> > + gimple_set_modified (stmt, true);
Add
if (TREE_CODE (res) == SSA_NAME
&& !is_gimple_debug (stmt))
gimple_set_plf (SSA_NAME_DEF_STMT (res),
NECESSARY, true);
here.
> > + }
> > + }
> > + }
> > +
> > if (gimple_modified_p (stmt))
> > {
> > /* If a formerly non-invariant ADDR_EXPR is turned into an
> >
> > note that in general optimzing
> >
> > q = p + 1;
> > = ...*(p + 1);
> >
> > "back" to *q will be undone by forwprop/stmt folding later but in this
> > case the feeding stmt is a PHI node and not a pointer-plus. It still
> > means that the change might be a bit too disruptive at this point
> > (we could restricit it a bit by only handling the case where we don't
> > replace with a pointer-plus result).
>
> Thanks for your work on this! Sadly GCC ICEs with this patch:
>
> 0xd36f53 update_dep_bb
> gcc/tree-ssa-tail-merge.c:411
> 0xd38f54 stmt_update_dep_bb
> gcc/tree-ssa-tail-merge.c:429
> 0xd38f54 same_succ_hash
> gcc/tree-ssa-tail-merge.c:452
> 0xd38f54 find_same_succ_bb
> gcc/tree-ssa-tail-merge.c:717
> 0xd39927 find_same_succ
> gcc/tree-ssa-tail-merge.c:748
> 0xd39927 init_worklist
> gcc/tree-ssa-tail-merge.c:767
> 0xd39927 tail_merge_optimize(unsigned int)
> gcc/tree-ssa-tail-merge.c:1726
> 0xce2d6a execute
> gcc/tree-ssa-pre.c:5164
>
>
>From gcc-bugs-return-558715-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 14:05:41 2017
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Subject: [Bug debug/80025] [5/6/7 Regression] ICE w/ -O2 (-O3, -Ofast) -g -ftracer (infinite recursion in rtx_equal_for_cselib_1)
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--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Bernd Schmidt from comment #12)
> That still doesn't seem to address the root cause though? Isn't the problem
> that this reversible mappings code can create cycles and we should avoid
> creating these in the first place?
They can create cycles, but we can't avoid creating them generally, they are
very important for the debug info quality; if there is no cycle, it isn't a
problem, and determining whether there is a cycle is hard, because the locs
lists aren't cast in stone, they actually can have further locs added or
removed as the cselib processing goes on; and rtx_equal_for_cselib_1 is used
while they are still in flux. Furthermore, even if there is a cycle, the
comparison function might not run into the cycle. With the cap the comparison
function might try to use some other location in another recursion level and be
successful.
>From gcc-bugs-return-558716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 14:07:14 2017
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
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--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
OK, I will have to find an x86 box -- fortran cross is too challenging.
Meanwhile, could you please add -fdump-tree-reassoc2 and
-fdump-tree-slsr-details and post the results? Might be able to figure it out
from that.
>From gcc-bugs-return-558717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 14:25:47 2017
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Subject: [Bug middle-end/79990] [CHKP] ICE in expand_expr_addr_expr_1, at expr.c:7790
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--- Comment #2 from Alexander Ivchenko <aivchenk at gmail dot com> ---
I proposed a fix for this:
https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01222.html
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Subject: [Bug target/78543] [6 Regression] ICE in push_reload, at reload.c:1349 on powerpc64le-linux-gnu
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--- Comment #18 from Michael Meissner <meissner at gcc dot gnu.org> ---
Created attachment 41035
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41035&action=edit
Proposed patch to fix the problem
This patch does not allow SUBREG's in bswap functions, which confuses the
register allocators. It has passed without regression on a little endian
power8 system, and I'm testing it on a big endian power8 system and big endian
power7 system.
I also will be testing the back port to gcc 6 (and later gcc 5).
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 41037
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slsr dump
probably not too helpful as it crashes
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 41036
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reassoc2 dump
>From gcc-bugs-return-558721-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 14:43:25 2017
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From: "john.salmon at deshaw dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/80137] std::generate_canonical calls its generator a non-constant number of times
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--- Comment #1 from John Salmon <john.salmon at deshaw dot com> ---
The misbehavior is observable by comparing an rng that is invoked directly with
one that is invoked via generate_canonical.
drdws0134$ cat skippy.cpp
#include <iostream>
#include <random>
int main()
{
std::mt19937 rng;
std::seed_seq sequence{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
rng.seed(sequence);
rng.discard(12 * 629143);
std::mt19937 rng2{rng};
for(int i=0; i<20; ++i)
{
// mt19937 produces more than 23 bits per invocation, so
// generate_canonical should invoke rng once.
(void)std::generate_canonical<float, 23>(rng);
// invoke rng2 once as well
(void)rng2();
// they should still be in sync
if( rng2 != rng )
{
std::cout << "Bug at 12* 629143 + " << i << "!\n";
return 1;
}
}
return 0;
}
drdws0134$ g++ -Wall -std=c++11 skippy.cpp
drdws0134$ ./a.out
Bug at 12* 629143 + 6!
drdws0134$ drdws0134$ g++ --version
g++ (GCC) 6.3.0
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
drdws0134$
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
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--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 23 Mar 2017, wschmidt at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80158
>
> --- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
> OK, I will have to find an x86 box -- fortran cross is too challenging.
> Meanwhile, could you please add -fdump-tree-reassoc2 and
> -fdump-tree-slsr-details and post the results? Might be able to figure it out
> from that.
Attached. Fortran cross should be easy enough as you just need f951,
so make all-gcc is enough.
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Subject: [Bug target/80160] [7 regression] operand has impossible constraints
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
Target Milestone|--- |7.0
>From gcc-bugs-return-558724-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 14:46:58 2017
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
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--- Comment #9 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Thanks, those dumps are very helpful. I found an x86 box, just need to get set
up now. The SLSR dump is truncated but it still tells me what it was working
on when it died, so should help me out.
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Subject: [Bug rtl-optimization/80159] [7 regression] gcc takes very long time with -Os
Date: Thu, 23 Mar 2017 14:47:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |compile-time-hog, ra
Target| |i?86-*-*
Target Milestone|--- |7.0
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Subject: [Bug target/71436] [7 Regression] Segmentation fault in arm_output_multireg_pop
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71436
--- Comment #15 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Thu Mar 23 14:55:48 2017
New Revision: 246419
URL: https://gcc.gnu.org/viewcvs?rev=246419&root=gcc&view=rev
Log:
[ARM] PR target/71436: Restrict *load_multiple pattern till after LRA
PR target/71436
* config/arm/arm.md (*load_multiple): Add reload_completed to
matching condition.
* gcc.c-torture/compile/pr71436.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr71436.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/arm.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/71436] [7 Regression] Segmentation fault in arm_output_multireg_pop
Date: Thu, 23 Mar 2017 14:57:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #16 from ktkachov at gcc dot gnu.org ---
Fixed.
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Subject: [Bug target/80160] [7 regression] operand has impossible constraints
Date: Thu, 23 Mar 2017 15:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-23
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Confirmed, bisecting and reducing.
>From gcc-bugs-return-558729-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 15:10:41 2017
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 15:10:00 -0000
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--- Comment #10 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Pretty certain the problem is in this chunk:
if (bump == 0)
{
tree lhs = gimple_assign_lhs (c->cand_stmt);
gassign *copy_stmt = gimple_build_assign (lhs, basis_name);
gimple_stmt_iterator gsi = gsi_for_stmt (c->cand_stmt);
gimple_set_location (copy_stmt, gimple_location (c->cand_stmt));
gsi_replace (&gsi, copy_stmt, false);
c->cand_stmt = copy_stmt;
if (dump_file && (dump_flags & TDF_DETAILS))
stmt_to_print = copy_stmt;
}
We need a gimple_set_bb (copy_stmt, gimple_bb (c->cand_stmt)) in here if we're
going to rely on the BB information for dominators subsequently. There may be
other cases like this in the code.
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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/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 15:14:00 -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 #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Bill Schmidt from comment #10)
> Pretty certain the problem is in this chunk:
>
> if (bump == 0)
> {
> tree lhs = gimple_assign_lhs (c->cand_stmt);
> gassign *copy_stmt = gimple_build_assign (lhs, basis_name);
> gimple_stmt_iterator gsi = gsi_for_stmt (c->cand_stmt);
> gimple_set_location (copy_stmt, gimple_location (c->cand_stmt));
> gsi_replace (&gsi, copy_stmt, false);
> c->cand_stmt = copy_stmt;
> if (dump_file && (dump_flags & TDF_DETAILS))
> stmt_to_print = copy_stmt;
> }
>
> We need a gimple_set_bb (copy_stmt, gimple_bb (c->cand_stmt)) in here if
> we're going to rely on the BB information for dominators subsequently.
> There may be other cases like this in the code.
gsi_replace does
gimple_set_bb (stmt, gsi_bb (*gsi));
so I don't see why that would be needed.
>From gcc-bugs-return-558731-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 15:19:41 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 15:19:00 -0000
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--- Comment #12 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 23 Mar 2017, wschmidt at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80158
>
> --- Comment #10 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
> Pretty certain the problem is in this chunk:
>
> if (bump == 0)
> {
> tree lhs = gimple_assign_lhs (c->cand_stmt);
> gassign *copy_stmt = gimple_build_assign (lhs, basis_name);
> gimple_stmt_iterator gsi = gsi_for_stmt (c->cand_stmt);
> gimple_set_location (copy_stmt, gimple_location (c->cand_stmt));
> gsi_replace (&gsi, copy_stmt, false);
> c->cand_stmt = copy_stmt;
> if (dump_file && (dump_flags & TDF_DETAILS))
> stmt_to_print = copy_stmt;
> }
>
> We need a gimple_set_bb (copy_stmt, gimple_bb (c->cand_stmt)) in here if we're
> going to rely on the BB information for dominators subsequently. There may be
> other cases like this in the code.
But copy_stmt should have a BB as you did a gsi_replace on it. The
stmt in question that causes the crash has none.
Instead I susepct somehwere we replace the affected stmt but keep a
dangling c->cand_stmt pointing to it around.
>From gcc-bugs-return-558732-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 15:21:41 2017
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From: "wschmidt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 15:21:00 -0000
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--- Comment #13 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
OK, sure, that is quite possible. Seems like something that should have popped
up before, but I guess the information gathered from the old cand->stmt must
have been harmless.
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Subject: [Bug target/80160] [7 regression] operand has impossible constraints
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase with -O2 -fno-omit-frame-pointer -march=pentium-mmx -m32:
typedef struct { long long a; } a_t;
int *a, b;
a_t *e, c;
long long f;
void fn (int);
void fn2 (void);
int fn3 (a_t);
void fn4 (a_t);
a_t foo (long long val) { return (a_t){val}; }
static void
bar (int ka)
{
unsigned i;
for (i = 0; i < 512; i++) {
long d;
c = (a_t){d};
fn2 ();
}
fn (ka);
}
void
test (void)
{
a_t g;
a_t *h, j;
h = e;
j = *h;
if (e == (a_t *) 1) {
a_t k = {fn3 (j)};
fn4 (j);
long l;
g = foo((long long)b << 2 | l);
k = g;
if (j.a != k.a) {
a_t m = g;
int n = m.a, o = m.a >> 32;
asm ("" : "=m"(*a), "+A"(f) : "b"(n), "c"(o));
}
}
bar ((int) h);
}
>From gcc-bugs-return-558734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 15:37:46 2017
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 15:37:00 -0000
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-23
Ever confirmed|0 |1
--- Comment #14 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
I can reproduce now, confirmed.
>From gcc-bugs-return-558735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 15:40:30 2017
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Subject: [Bug target/80160] [7 regression] operand has impossible constraints
Date: Thu, 23 Mar 2017 15:40:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bernds at gcc dot gnu.org,
| |vmakarov at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r246059.
>From gcc-bugs-return-558736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 15:48:43 2017
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Subject: [Bug testsuite/80092] Add effective-target keywords for unsupported nvptx features
Date: Thu, 23 Mar 2017 15:48:00 -0000
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Submitted "[testsuite] Add missing dg-require-effective-target alloca to gcc
testsuite" ( https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01227.html )
>From gcc-bugs-return-558737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 15:49:18 2017
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Subject: [Bug fortran/78881] [F03] reading from string with DTIO procedure does not work properly
Date: Thu, 23 Mar 2017 15:49:00 -0000
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--- Comment #11 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
I finally figured out what is happening.
The parent READ begins with eating any leading spaces. If a non-space character
is found, rather than seek backward (which can't be done with some units) we
unget the character and save it in the dtp structure.
The dtp structure is not passed to the child procedure, only the unit structure
is passed. This means the first READ in the child procedure does not know that
first character even exists.
To fix it I will move the saved character to the unit structure rather than the
dtp structure (or something similar) so that it is seen by the child procedure.
Since the parent is list directed and the child is formatted I/O this does
create some complications since in our library, we have different next_char()
functions for formatted and list directed.
>From gcc-bugs-return-558738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 15:50:27 2017
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Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
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--- Comment #14 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #13)
> On Thu, 23 Mar 2017, thopre01 at gcc dot gnu.org wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80155
> >
> > --- Comment #12 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
> > (In reply to Richard Biener from comment #9)
> > > Ah, the patches do not fix the testcase because the testcase is _not_ the
> > > PRE-creates-IV case. It's indeed simply hoisting/PRE at work transforming
> > >
> > > # a_14 = PHI <a_10(, a_5(D)>
> > > if (!b)
> > > a_8 = a_14 + 1;
> > >
> > > # a_2 = PHI <a_14(10), a_8(4)>
> > > a_10 = a_2 + 1;
> > > ... = *(a_2 + 1);
> > >
> > > to
> > >
> > > # a_14 = PHI <prephimp_12, a_5(D)>
> > > _4 = a_14 + 1;
> > > if (b)
> > > _3 = _4 + 1;
> > >
> > > # a_2 = PHI <a_14, _4>
> > > # prephitmp_12 = PHI <_4, _3>
> > > ... = *(a_2 + 1);
> > >
> > > increasing register pressure mainly because nothing figures that a_2 + 1
> > > in the dereference can be replaced by prephitmp_12 ...
> > >
> > > So this is a missed SLSR opportunity or, in this simple form, a missed
> > > PRE/CSE opportunity. Fixing that with the following (otherwise untested)
> > > restores good code generation for the testcase:
> > >
> > > Index: gcc/tree-ssa-pre.c
> > > ===================================================================
> > > --- gcc/tree-ssa-pre.c (revision 246414)
> > > +++ gcc/tree-ssa-pre.c (working copy)
> > > @@ -4636,6 +4610,35 @@ eliminate_dom_walker::before_dom_childre
> > > }
> > > }
> > >
> > > + if (gimple_has_ops (stmt))
> > > + for (unsigned i = 0; i < gimple_num_ops (stmt); ++i)
> > > + {
> > > + tree op = gimple_op (stmt, i);
> > > + if (op)
> > > + op = get_base_address (op);
> > > + if (op
> > > + && TREE_CODE (op) == MEM_REF
> > > + && ! integer_zerop (TREE_OPERAND (op, 1)))
> > > + {
> > > + tree ops[2];
> > > + vn_nary_op_t nary;
> > > + ops[0] = TREE_OPERAND (op, 0);
> > > + ops[1] = TREE_OPERAND (op, 1);
> > > + tree res = vn_nary_op_lookup_pieces (2, POINTER_PLUS_EXPR,
> > > + TREE_TYPE (ops[0]),
> > > + ops, &nary);
> > > + if (res && TREE_CODE (res) == SSA_NAME)
> > > + res = eliminate_avail (res);
> > > + if (res)
> > > + {
> > > + TREE_OPERAND (op, 0) = res;
> > > + TREE_OPERAND (op, 1)
> > > + = build_int_cst (TREE_TYPE (TREE_OPERAND (op, 1)), 0);
> > > + gimple_set_modified (stmt, true);
>
> Add
>
> if (TREE_CODE (res) == SSA_NAME
> && !is_gimple_debug (stmt))
> gimple_set_plf (SSA_NAME_DEF_STMT (res),
> NECESSARY, true);
>
> here.
>
> > > + }
> > > + }
> > > + }
> > > +
> > > if (gimple_modified_p (stmt))
> > > {
> > > /* If a formerly non-invariant ADDR_EXPR is turned into an
> > >
> > > note that in general optimzing
> > >
> > > q = p + 1;
> > > = ...*(p + 1);
> > >
> > > "back" to *q will be undone by forwprop/stmt folding later but in this
> > > case the feeding stmt is a PHI node and not a pointer-plus. It still
> > > means that the change might be a bit too disruptive at this point
> > > (we could restricit it a bit by only handling the case where we don't
> > > replace with a pointer-plus result).
> >
> > Thanks for your work on this! Sadly GCC ICEs with this patch:
> >
> > 0xd36f53 update_dep_bb
> > gcc/tree-ssa-tail-merge.c:411
> > 0xd38f54 stmt_update_dep_bb
> > gcc/tree-ssa-tail-merge.c:429
> > 0xd38f54 same_succ_hash
> > gcc/tree-ssa-tail-merge.c:452
> > 0xd38f54 find_same_succ_bb
> > gcc/tree-ssa-tail-merge.c:717
> > 0xd39927 find_same_succ
> > gcc/tree-ssa-tail-merge.c:748
> > 0xd39927 init_worklist
> > gcc/tree-ssa-tail-merge.c:767
> > 0xd39927 tail_merge_optimize(unsigned int)
> > gcc/tree-ssa-tail-merge.c:1726
> > 0xce2d6a execute
> > gcc/tree-ssa-pre.c:5164
> >
> >
There's progress. Performance is improved but not as much as disabling code
hoisting. I'll try to reduce the testcase again with that patch to see if I can
find a testcase that expose all issues.
>From gcc-bugs-return-558739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 15:52:32 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/79772] [6/7 Regression][CHKP] ICE on invalid code in chkp_process_stmt (tree-chkp.c:4034)
Date: Thu, 23 Mar 2017 15:52:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
This ICE is resolved by the patch for bug 79986. Resolving as duplicate.
*** This bug has been marked as a duplicate of bug 79986 ***
>From gcc-bugs-return-558740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 15:52:32 2017
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Subject: [Bug c++/79986] [6/7 Regression][CHKP] ICE in fold_convert_loc with a flexible array
Date: Thu, 23 Mar 2017 15:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79986
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 79772 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-558741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 15:52:34 2017
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Subject: [Bug other/65530] [meta-bug] -mmpx -fcheck-pointer-bounds failures
Date: Thu, 23 Mar 2017 15:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65530
Bug 65530 depends on bug 79772, which changed state.
Bug 79772 Summary: [6/7 Regression][CHKP] ICE on invalid code in chkp_process_stmt (tree-chkp.c:4034)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79772
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |DUPLICATE
>From gcc-bugs-return-558742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 15:53:04 2017
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 15:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80158
--- Comment #15 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
This is the only spot where we don't do an in-situ replacement. Testing a
patch to fix that.
>From gcc-bugs-return-558743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 16:11:39 2017
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 16:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80158
--- Comment #16 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Ah, that's not it at all. This is much more subtle. This has to do with
candidates that have alternate interpretations (as either a CAND_ADD or a
CAND_MULT). We fix up the candidate that we replace, but not the alternate
interpretation, if any. In this case the alternate interpretation is used as a
basis for another chain of expressions, and we run into trouble. Should not be
too hard to fix.
>From gcc-bugs-return-558744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 16:24:49 2017
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Subject: [Bug testsuite/80092] Add effective-target keywords for unsupported nvptx features
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80092
Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |nvptx
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-23
Ever confirmed|0 |1
--- Comment #2 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #0)
> Atm, when running for target nvptx, we run into unsupported features in the
> tests.
>
> F.i. in the g++ testsuite:
> ...
> $ grep -c "sorry, unimplemented:" g++.log
> 12693
> ...
... a lot...
> more in detail:
> ...
> $ grep "sorry, unimplemented:" g++.log | sed 's/.*sorry, unimplemented://' |
> dos2unix | sort -u
> converting lambda which uses '...' to function pointer
> global constructors not supported on this target
> global destructors not supported on this target
> indirect jumps are not available on this target
> mangling __underlying_type
> non-trivial designated initializers not supported
> passing arguments to ellipsis of inherited constructor 'B::B(int, ...)
> [inherited from A]'
> target cannot support alloca.
> target cannot support nonlocal goto.
> ...
>
> All those tests are FAILs, while they should be UNSUPPORTED.
>
> In principle, having those as FAILs is not a problem when regression
> testing. We can compare tests results, and only look at changes.
>
> But it's better to introduce effective-target keywords for those features,
> and mark the tests as such. That will reduce the noise rate because of
> unsupported features being used or not due to code generation changes.
But that will be a rather huge effort to do -- and to keep up to date. Is that
really worth it?
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Thu, 23 Mar 2017 16:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80158
--- Comment #17 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
The following fixes the reduced test case. Could you please test it on the
full 416.gamess build? I'll regstrap it on x86-64 and ppc64le.
Index: gcc/gimple-ssa-strength-reduction.c
===================================================================
--- gcc/gimple-ssa-strength-reduction.c (revision 246419)
+++ gcc/gimple-ssa-strength-reduction.c (working copy)
@@ -2089,6 +2089,8 @@ replace_mult_candidate (slsr_cand_t c, tree basis_
gimple_set_location (copy_stmt, gimple_location (c->cand_stmt));
gsi_replace (&gsi, copy_stmt, false);
c->cand_stmt = copy_stmt;
+ if (c->next_interp)
+ lookup_cand (c->next_interp)->cand_stmt = copy_stmt;
if (dump_file && (dump_flags & TDF_DETAILS))
stmt_to_print = copy_stmt;
}
@@ -2118,6 +2120,8 @@ replace_mult_candidate (slsr_cand_t c, tree basis_
basis_name, bump_tree);
update_stmt (gsi_stmt (gsi));
c->cand_stmt = gsi_stmt (gsi);
+ if (c->next_interp)
+ lookup_cand (c->next_interp)->cand_stmt = gsi_stmt (gsi);
if (dump_file && (dump_flags & TDF_DETAILS))
stmt_to_print = gsi_stmt (gsi);
}
@@ -3405,6 +3409,8 @@ replace_rhs_if_not_dup (enum tree_code new_code, t
gimple_assign_set_rhs_with_ops (&gsi, new_code, new_rhs1, new_rhs2);
update_stmt (gsi_stmt (gsi));
c->cand_stmt = gsi_stmt (gsi);
+ if (c->next_interp)
+ lookup_cand (c->next_interp)->cand_stmt = gsi_stmt (gsi);
if (dump_file && (dump_flags & TDF_DETAILS))
return gsi_stmt (gsi);
@@ -3511,6 +3517,8 @@ replace_one_candidate (slsr_cand_t c, unsigned i,
gimple_assign_set_rhs_with_ops (&gsi, MINUS_EXPR, basis_name, rhs2);
update_stmt (gsi_stmt (gsi));
c->cand_stmt = gsi_stmt (gsi);
+ if (c->next_interp)
+ lookup_cand (c->next_interp)->cand_stmt = gsi_stmt (gsi);
if (dump_file && (dump_flags & TDF_DETAILS))
stmt_to_print = gsi_stmt (gsi);
@@ -3532,6 +3540,8 @@ replace_one_candidate (slsr_cand_t c, unsigned i,
gimple_set_location (copy_stmt, gimple_location (c->cand_stmt));
gsi_replace (&gsi, copy_stmt, false);
c->cand_stmt = copy_stmt;
+ if (c->next_interp)
+ lookup_cand (c->next_interp)->cand_stmt = copy_stmt;
if (dump_file && (dump_flags & TDF_DETAILS))
stmt_to_print = copy_stmt;
@@ -3543,6 +3553,8 @@ replace_one_candidate (slsr_cand_t c, unsigned i,
gimple_set_location (cast_stmt, gimple_location (c->cand_stmt));
gsi_replace (&gsi, cast_stmt, false);
c->cand_stmt = cast_stmt;
+ if (c->next_interp)
+ lookup_cand (c->next_interp)->cand_stmt = cast_stmt;
if (dump_file && (dump_flags & TDF_DETAILS))
stmt_to_print = cast_stmt;
>From gcc-bugs-return-558746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 16:28:09 2017
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From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
Date: Thu, 23 Mar 2017 16:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80155
--- Comment #15 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Thomas Preud'homme from comment #14)
> (In reply to rguenther@suse.de from comment #13)
> > On Thu, 23 Mar 2017, thopre01 at gcc dot gnu.org wrote:
> >
> > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80155
> > >
> > > --- Comment #12 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
> > > (In reply to Richard Biener from comment #9)
> > > > Ah, the patches do not fix the testcase because the testcase is _not_ the
> > > > PRE-creates-IV case. It's indeed simply hoisting/PRE at work transforming
> > > >
> > > > # a_14 = PHI <a_10(, a_5(D)>
> > > > if (!b)
> > > > a_8 = a_14 + 1;
> > > >
> > > > # a_2 = PHI <a_14(10), a_8(4)>
> > > > a_10 = a_2 + 1;
> > > > ... = *(a_2 + 1);
> > > >
> > > > to
> > > >
> > > > # a_14 = PHI <prephimp_12, a_5(D)>
> > > > _4 = a_14 + 1;
> > > > if (b)
> > > > _3 = _4 + 1;
> > > >
> > > > # a_2 = PHI <a_14, _4>
> > > > # prephitmp_12 = PHI <_4, _3>
> > > > ... = *(a_2 + 1);
> > > >
> > > > increasing register pressure mainly because nothing figures that a_2 + 1
> > > > in the dereference can be replaced by prephitmp_12 ...
> > > >
> > > > So this is a missed SLSR opportunity or, in this simple form, a missed
> > > > PRE/CSE opportunity. Fixing that with the following (otherwise untested)
> > > > restores good code generation for the testcase:
> > > >
> > > > Index: gcc/tree-ssa-pre.c
> > > > ===================================================================
> > > > --- gcc/tree-ssa-pre.c (revision 246414)
> > > > +++ gcc/tree-ssa-pre.c (working copy)
> > > > @@ -4636,6 +4610,35 @@ eliminate_dom_walker::before_dom_childre
> > > > }
> > > > }
> > > >
> > > > + if (gimple_has_ops (stmt))
> > > > + for (unsigned i = 0; i < gimple_num_ops (stmt); ++i)
> > > > + {
> > > > + tree op = gimple_op (stmt, i);
> > > > + if (op)
> > > > + op = get_base_address (op);
> > > > + if (op
> > > > + && TREE_CODE (op) == MEM_REF
> > > > + && ! integer_zerop (TREE_OPERAND (op, 1)))
> > > > + {
> > > > + tree ops[2];
> > > > + vn_nary_op_t nary;
> > > > + ops[0] = TREE_OPERAND (op, 0);
> > > > + ops[1] = TREE_OPERAND (op, 1);
> > > > + tree res = vn_nary_op_lookup_pieces (2, POINTER_PLUS_EXPR,
> > > > + TREE_TYPE (ops[0]),
> > > > + ops, &nary);
> > > > + if (res && TREE_CODE (res) == SSA_NAME)
> > > > + res = eliminate_avail (res);
> > > > + if (res)
> > > > + {
> > > > + TREE_OPERAND (op, 0) = res;
> > > > + TREE_OPERAND (op, 1)
> > > > + = build_int_cst (TREE_TYPE (TREE_OPERAND (op, 1)), 0);
> > > > + gimple_set_modified (stmt, true);
> >
> > Add
> >
> > if (TREE_CODE (res) == SSA_NAME
> > && !is_gimple_debug (stmt))
> > gimple_set_plf (SSA_NAME_DEF_STMT (res),
> > NECESSARY, true);
> >
> > here.
> >
> > > > + }
> > > > + }
> > > > + }
> > > > +
> > > > if (gimple_modified_p (stmt))
> > > > {
> > > > /* If a formerly non-invariant ADDR_EXPR is turned into an
> > > >
> > > > note that in general optimzing
> > > >
> > > > q = p + 1;
> > > > = ...*(p + 1);
> > > >
> > > > "back" to *q will be undone by forwprop/stmt folding later but in this
> > > > case the feeding stmt is a PHI node and not a pointer-plus. It still
> > > > means that the change might be a bit too disruptive at this point
> > > > (we could restricit it a bit by only handling the case where we don't
> > > > replace with a pointer-plus result).
> > >
> > > Thanks for your work on this! Sadly GCC ICEs with this patch:
> > >
> > > 0xd36f53 update_dep_bb
> > > gcc/tree-ssa-tail-merge.c:411
> > > 0xd38f54 stmt_update_dep_bb
> > > gcc/tree-ssa-tail-merge.c:429
> > > 0xd38f54 same_succ_hash
> > > gcc/tree-ssa-tail-merge.c:452
> > > 0xd38f54 find_same_succ_bb
> > > gcc/tree-ssa-tail-merge.c:717
> > > 0xd39927 find_same_succ
> > > gcc/tree-ssa-tail-merge.c:748
> > > 0xd39927 init_worklist
> > > gcc/tree-ssa-tail-merge.c:767
> > > 0xd39927 tail_merge_optimize(unsigned int)
> > > gcc/tree-ssa-tail-merge.c:1726
> > > 0xce2d6a execute
> > > gcc/tree-ssa-pre.c:5164
> > >
> > >
>
> There's progress. Performance is improved but not as much as disabling code
> hoisting. I'll try to reduce the testcase again with that patch to see if I
> can find a testcase that expose all issues.
Funnily this led back to the Cortex-M0+ reduced testcase. With the patch in
comment #13 applied we can still see a difference in the push (one register
pushed Vs 0).
>From gcc-bugs-return-558747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 16:36:02 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/79255] [6/7 Regression] PGO bootstrap fails on x86_64/ppc64le building Ada
Date: Thu, 23 Mar 2017 16:36:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, what I see is:
#0 add_AT_unsigned (die=0x7fffedd374b0, attr_kind=DW_AT_inline,
unsigned_val=2) at ../../gcc/dwarf2out.c:4150
#1 0x0000000000ea5d65 in gen_subprogram_die (decl=0x7fffee138600,
context_die=0x0) at ../../gcc/dwarf2out.c:22117
#2 0x0000000000eaf43e in gen_decl_die (decl=0x7fffee138600, origin=0x0,
ctx=0x0, context_die=0x0) at ../../gcc/dwarf2out.c:25284
#3 0x0000000000eb08d5 in dwarf2out_decl (decl=0x7fffee138600) at
../../gcc/dwarf2out.c:25793
#4 0x0000000000ea4d08 in dwarf2out_abstract_function (decl=0x7fffee138600) at
../../gcc/dwarf2out.c:21656
#5 0x0000000000eaf248 in gen_decl_die (decl=0x0, origin=0x7fffee138600,
ctx=0x0, context_die=0x7fffecb246e0) at ../../gcc/dwarf2out.c:25241
#6 0x0000000000eadd68 in process_scope_var (stmt=0x7fffeddf3480, decl=0x0,
origin=0x7fffee138600, context_die=0x7fffecb246e0)
at ../../gcc/dwarf2out.c:24833
#7 0x0000000000eadec7 in decls_for_scope (stmt=0x7fffeddf3480,
context_die=0x7fffecb246e0) at ../../gcc/dwarf2out.c:24865
#8 0x0000000000ea9212 in gen_lexical_block_die (stmt=0x7fffeddf3480,
context_die=0x7fffecb245a0) at ../../gcc/dwarf2out.c:23207
#9 0x0000000000eada71 in gen_block_die (stmt=0x7fffeddf3480,
context_die=0x7fffecb245a0) at ../../gcc/dwarf2out.c:24795
#10 0x0000000000eadf13 in decls_for_scope (stmt=0x7fffeddf33c0,
context_die=0x7fffecb245a0) at ../../gcc/dwarf2out.c:24876
#11 0x0000000000ea93b7 in gen_inlined_subroutine_die (stmt=0x7fffeddf33c0,
context_die=0x7fffedd34000) at ../../gcc/dwarf2out.c:23245
#12 0x0000000000eada5c in gen_block_die (stmt=0x7fffeddf33c0,
context_die=0x7fffedd34000) at ../../gcc/dwarf2out.c:24792
#13 0x0000000000eadf13 in decls_for_scope (stmt=0x7fffee11cf00,
context_die=0x7fffedd34000) at ../../gcc/dwarf2out.c:24876
#14 0x0000000000eada86 in gen_block_die (stmt=0x7fffee11cf00,
context_die=0x7fffedd34000) at ../../gcc/dwarf2out.c:24798
#15 0x0000000000eadf13 in decls_for_scope (stmt=0x7fffee11ce40,
context_die=0x7fffedd34000) at ../../gcc/dwarf2out.c:24876
#16 0x0000000000ea6b1a in gen_subprogram_die (decl=0x7fffee2f8600,
context_die=0x7fffefcf3000) at ../../gcc/dwarf2out.c:22441
#17 0x0000000000eaf43e in gen_decl_die (decl=0x7fffee2f8600, origin=0x0,
ctx=0x0, context_die=0x7fffefcf3000) at ../../gcc/dwarf2out.c:25284
#18 0x0000000000eb08d5 in dwarf2out_decl (decl=0x7fffee2f8600) at
../../gcc/dwarf2out.c:25793
#19 0x0000000000eb0934 in dwarf2out_function_decl (decl=0x7fffee2f8600) at
../../gcc/dwarf2out.c:25808
#20 0x0000000000f401e7 in rest_of_handle_final () at ../../gcc/final.c:4520
It doesn't seem to me that
exp_ch5__expand_assign_with_target_names__replace_target_name
(the innermost decl) is actually inlined, the reason it is
dwarf2out_abstract_function is that it is present in some other inline
function's BLOCK_NONLOCALIZED_VARS and for those we do:
if (! early_dwarf)
for (i = 0; i < BLOCK_NUM_NONLOCALIZED_VARS (stmt); i++)
process_scope_var (stmt, NULL, BLOCK_NONLOCALIZED_VAR (stmt, i),
context_die);
I wonder if we shouldn't do:
--- gcc/dwarf2out.c.jj 2017-03-22 17:51:56.000000000 +0100
+++ gcc/dwarf2out.c 2017-03-23 17:31:45.225862154 +0100
@@ -24861,8 +24861,13 @@ decls_for_scope (tree stmt, dw_die_ref c
if we've done it once already. */
if (! early_dwarf)
for (i = 0; i < BLOCK_NUM_NONLOCALIZED_VARS (stmt); i++)
- process_scope_var (stmt, NULL, BLOCK_NONLOCALIZED_VAR (stmt, i),
- context_die);
+ {
+ decl = BLOCK_NONLOCALIZED_VAR (stmt, i);
+ if (TREE_CODE (decl) == FUNCTION_DECL)
+ process_scope_var (stmt, decl, NULL_TREE, context_die);
+ else
+ process_scope_var (stmt, NULL_TREE, decl, context_die);
+ }
}
/* Even if we're at -g1, we need to process the subblocks in order to get
which fixes the ICE, because then we really abstract only actually inlined
functions (those appearing in BLOCK_ABSTRACT_ORIGIN).
>From gcc-bugs-return-558748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 16:44:18 2017
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/80092] Add effective-target keywords for unsupported nvptx features
Date: Thu, 23 Mar 2017 16:44:00 -0000
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--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Thomas Schwinge from comment #2)
> (In reply to Tom de Vries from comment #0)
> > But it's better to introduce effective-target keywords for those features,
> > and mark the tests as such. That will reduce the noise rate because of
> > unsupported features being used or not due to code generation changes.
>
> But that will be a rather huge effort to do -- and to keep up to date. Is
> that really worth it?
The initial amount of tests to process will be large.
That would be a huge effort to do, if it would be done manually.
However, I would write a script parsing gcc.log or similar to generate those
changes.
Keeping things up-to-date once there's a script will require little effort, I
suppose.
>From gcc-bugs-return-558749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 16:46:27 2017
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From: "jeff.science at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80161] New: const argument hidden from AVX intrinsics due to OpenMP outlining
Date: Thu, 23 Mar 2017 16:46:00 -0000
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Bug ID: 80161
Summary: const argument hidden from AVX intrinsics due to
OpenMP outlining
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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I get "error: the last argument must be scale 1, 2, 4, 8" when the argument is
"const int scale = 1", only when OpenMP is active.
Having seen similar issues in other compilers, I suspect that the OpenMP
outlining creates an indirection in which the constant properties of "scale"
are lost and thus not visible to the pass that parses intrinsics.
I know that manually inlining and the preprocessor provide a way to solve this,
but neither of those meets other requirements.
# Source Code
$ cat gccbug.c
#include "emmintrin.h"
#include "immintrin.h"
void copy_vgatherdpd128(size_t n, const double * restrict a, double * restrict
b)
{
__m128i vindex = _mm_set_epi32(-1,-1,8,0);
const int scale = 1;
#ifdef _OPENMP
#pragma omp parallel for
#endif
for (size_t i=0; i<n; i+=2) {
__m128d t = _mm_i32gather_pd( &(a[i]), vindex, scale );
_mm_storel_pd( &(b[i ]), t);
_mm_storeh_pd( &(b[i+1]), t);
}
}
# Build without OpenMP
[jrhammon@esgmonster simd-memtest]$ gcc-7 -O3 -march=core-avx2 -std=gnu11 -g3
-Wall -c gccbug.c -o gccbug.o
# Build with OpenMP
[jrhammon@esgmonster simd-memtest]$ gcc-7 -O3 -march=core-avx2 -std=gnu11 -g3
-Wall -fopenmp -c gccbug.c -o gccbug.o
In file included from
/opt/gcc/HEAD/lib/gcc/x86_64-pc-linux-gnu/7.0.1/include/immintrin.h:43:0,
from gccbug.c:2:
/opt/gcc/HEAD/lib/gcc/x86_64-pc-linux-gnu/7.0.1/include/avx2intrin.h: In
function ‘copy_vgatherdpd128._omp_fn.0’:
/opt/gcc/HEAD/lib/gcc/x86_64-pc-linux-gnu/7.0.1/include/avx2intrin.h:1254:10:
error: the last argument must be scale 1, 2, 4, 8
return (__m128d) __builtin_ia32_gathersiv2df (_mm_undefined_pd (),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
__base,
~~~~~~~
(__v4si)__index,
~~~~~~~~~~~~~~~~
__mask,
~~~~~~~
__scale);
~~~~~~~~
# GCC details
I compiled GCC from Git HEAD today.
$ gcc-7 -v
Using built-in specs.
COLLECT_GCC=gcc-7
COLLECT_LTO_WRAPPER=/opt/gcc/HEAD/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /opt/gcc//git/configure --program-suffix=-7 --disable-multilib
--enable-threads=posix --enable-checking=release --with-system-zlib
--enable-__cxa_atexit --enable-languages=c,c++,fortran --with-tune=native
--enable-bootstrap --enable-lto --enable-gold=yes --enable-ld=yes
--prefix=/opt/gcc//HEAD
Thread model: posix
gcc version 7.0.1 20170323 (experimental) (GCC)
$ gcc-7 --version
gcc-7 (GCC) 7.0.1 20170323 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>From gcc-bugs-return-558750-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 16:59:09 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/79255] [6/7 Regression] PGO bootstrap fails on x86_64/ppc64le building Ada
Date: Thu, 23 Mar 2017 16:59:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Short C testcase that ICEs without the patch:
/* PR bootstrap/79255 */
/* { dg-do compile } */
/* { dg-options "-O2 -g -fno-toplevel-reorder -Wno-attributes" } */
static inline __attribute__((always_inline)) int foo (int x);
int
baz (void)
{
return foo (3) + foo (6) + foo (9);
}
static inline __attribute__((always_inline)) int
foo (int x)
{
auto inline int __attribute__((noinline)) bar (int x)
{
return x + 3;
}
return bar (x) + bar (x + 2);
}
and succeeds with the patch.
>From gcc-bugs-return-558751-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 17:03:52 2017
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Subject: [Bug target/80160] [7 regression] operand has impossible constraints
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
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Subject: [Bug target/80148] [7 Regression] operand has impossible constraints
Date: Thu, 23 Mar 2017 17:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80148
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-23
Target Milestone|--- |7.0
Summary|operand has impossible |[7 Regression] operand has
|constraints |impossible constraints
Ever confirmed|0 |1
>From gcc-bugs-return-558753-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 17:09:08 2017
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Subject: [Bug rtl-optimization/80159] [7 regression] gcc takes very long time with -Os
Date: Thu, 23 Mar 2017 17:09:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
CC| |bernds at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Also started with r246059.
>From gcc-bugs-return-558754-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 17:15:41 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80161] const argument hidden from AVX intrinsics due to OpenMP outlining
Date: Thu, 23 Mar 2017 17:15:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |openmp
Component|c |target
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Well in C, there is no such thing as a const variable which is considered a
constant integer expression (C++ has this notion though).
>From gcc-bugs-return-558755-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 17:19:21 2017
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80153] ivopt generate wrong code
Date: Thu, 23 Mar 2017 17:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80153
--- Comment #5 from amker at gcc dot gnu.org ---
(In reply to Richard Biener from comment #4)
> The reason for the tree-affine oddity is that IVO calls
>
> #0 tree_to_aff_combination (expr=<addr_expr 0x7ffff69c3fe0>,
> type=<integer_type 0x7ffff68b73f0>, comb=0x7fffffffd310)
>
> that is, tree_to_aff_combination with a mismatched expr/type. For example
> from
> alloc_iv:
>
> 1174 tree_to_aff_combination (expr, TREE_TYPE (base), &comb);
> 1175 base = fold_convert (TREE_TYPE (base), aff_combination_to_tree
> (&comb));
>
I think it doesn't matter if we use base's type or expr's type here. I will
test using consistent types here.
> that's unexpected. But the problematic case happens where IVO does right:
>
> Breakpoint 7, tree_to_aff_combination (expr=<nop_expr 0x7ffff69c3300>,
> type=<integer_type 0x7ffff68b73f0>, comb=0x7fffffffd4a0)
>
> but tree_to_aff_combination calls STRIP_NOPS on expr which is (unsigned int)
> "oops!\n" and thus creates the above problematical case itself.
>
> We can either avoid stripping the nops or deal with the appearant mismatch
> by converting back the elts we add to 'type'. I think instrumenting to
> see whether we can assert tree_to_aff_combination gets matched types passed
> (so we can eliminate the type arg) would be nice - we certainly can't handle
> all kind of mismatches sanely.
>
> Then using STRIP_SIGN_NOPS would be safe but IIRC removing sign conversions
> was intentional (though even that might be problematic). tree-affine was
> really designed for addresses (so type would always be a pointer).
>
> So sth like the following should better pass bootstrap / test (IVO will
> trigger
> the assert) but it might require adding some "safe" cases to not regress
> code quality (not sure if we have testcases):
>
> Index: gcc/tree-affine.c
> ===================================================================
> --- gcc/tree-affine.c (revision 246414)
> +++ gcc/tree-affine.c (working copy)
> @@ -261,12 +261,21 @@ tree_to_aff_combination (tree expr, tree
> HOST_WIDE_INT bitpos, bitsize;
> machine_mode mode;
> int unsignedp, reversep, volatilep;
> + tree exptype = TREE_TYPE (expr);
>
> - STRIP_NOPS (expr);
> + gcc_checking_assert (tree_nop_conversion_p (type, exptype)
> + && TYPE_UNSIGNED (type) == TYPE_UNSIGNED (exptype)
> + && POINTER_TYPE_P (type) == POINTER_TYPE_P (exptype));
> +
> + STRIP_SIGN_NOPS (expr);
>
> code = TREE_CODE (expr);
> switch (code)
> {
> + CASE_CONVERT:
> + /* Add safe cases. */
> + break;
> +
> case INTEGER_CST:
> aff_combination_const (comb, type, wi::to_widest (expr));
> return;
Seems there is an issue that tree-affine lacks ability differentiating between
(unsgined)(pointer + offset) and (unsigned)pointer + (unsigned)offset.
The current behavior of tree_to_aff_combination always folds type conversion
into operands, generating exact the same affines for above two expressions:
{
type = unsigned int
offset = 6
elements = {
[0] = "oops!\n" * 1,
[1] = ivtmp.37_10 * 0xffffffffffffffffffffffffffffffffffffffffffffffff
}
}
While converting affine back to tree, it takes the other way around, always
generating the latter expression: (unsgined)(pointer + offset). This causes
problem.
IIUC, there are two possible fixes here. First one is as you mentioned, we
work conservatively and don't fold type conversion into operands (by not
stripping nop). I suspect this could causes serious code generation
regression.
The second one is the opposite, we always fold type conversion into operands,
by keeping strip_nops. While converting affine back to tree, we generate
folded expression instead of trying to preserve pointer_plus expression as now.
I prefer the second one, and understand there is concern since tree affine is
used in code generation we could lose pointer arithmetic semantic information
like the pointer_plus expression never overflows/wraps. But, I think we can
afford this, considering possible code generation regression in the other way.
I think there shouldn't be fundamental difference in code generation given we
have or don't have the pointer_plus information. More important, IMHO, tree
affine should (only?) be used when trying to explore as many CSE opportunities
as possible by breaking most association order issues, like in IVOPTs. So,
customer of tree affine should (at least for most cases) use tree-affine in
code generation only when it finds out there is benefit to do so. If there is
no benefit, IVOPT wouldn't choose the corresponding candidate. Lastly, this
only affects type conversion of pointer_plus expressions (IVOPTs only because
it uses unsigned type in order to avoid overflow handling), a customer only
builds pointer type tree affine won't be affected.
Testing patch, let's see if there is any fallout. Thanks
>From gcc-bugs-return-558756-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 17:30:38 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/79612] missing space in diagnostic: Incorrect rank of return array in
Date: Thu, 23 Mar 2017 17:30:00 -0000
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Would something such as the following make sense (with a proper comment and the
commented lines removed)?
--- ../_clean/libgfortran/runtime/bounds.c 2017-01-01 17:39:08.000000000
+0100
+++ libgfortran/runtime/bounds.c 2017-03-23 14:10:10.000000000 +0100
@@ -40,9 +40,10 @@ bounds_iforeach_return (array_t *retarra
ret_rank = GFC_DESCRIPTOR_RANK (retarray);
- if (ret_rank != 1)
- runtime_error ("Incorrect rank of return array in %s intrinsic:"
- "is %ld, should be 1", name, (long int) ret_rank);
+ GFC_ASSERT(ret_rank == 1);
+ /* if (ret_rank != 1)
+ runtime_error ("Incorrect rank of return array in %s intrinsic: "
+ "is %ld, should be 1", name, (long int) ret_rank); */
rank = GFC_DESCRIPTOR_RANK (array);
ret_extent = GFC_DESCRIPTOR_EXTENT(retarray,0);
>From gcc-bugs-return-558757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 17:55:32 2017
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From: "bernds at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80160] [7 regression] operand has impossible constraints
Date: Thu, 23 Mar 2017 17:55:00 -0000
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--- Comment #4 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Perhaps this.
Index: lra-assigns.c
===================================================================
--- lra-assigns.c (revision 246226)
+++ lra-assigns.c (working copy)
@@ -908,7 +908,8 @@ must_not_spill_p (unsigned spill_regno)
does not solve the general case where existing reloads fully
cover a limited register class. */
if (!bitmap_bit_p (&non_reload_pseudos, spill_regno)
- && reg_class_size [reg_preferred_class (spill_regno)] == 1)
+ && reg_class_size [reg_preferred_class (spill_regno)] == 1
+ && reg_alternate_class (spill_regno) == NO_REGS)
return true;
return false;
}
>From gcc-bugs-return-558758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 18:23:56 2017
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80150] [6 Regression] Internal compiler error when in in try_one_overload, at cp/pt.c:18903
Date: Thu, 23 Mar 2017 18:23:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Known to work| |7.0
Summary|[6/7 Regression] Internal |[6 Regression] Internal
|compiler error when in in |compiler error when in in
|try_one_overload, at |try_one_overload, at
|cp/pt.c:18903 |cp/pt.c:18903
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-558759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 18:24:04 2017
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Subject: [Bug c++/80150] [6 Regression] Internal compiler error when in in try_one_overload, at cp/pt.c:18903
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80150
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Mar 23 18:23:25 2017
New Revision: 246422
URL: https://gcc.gnu.org/viewcvs?rev=246422&root=gcc&view=rev
Log:
PR c++/80150 - ICE with overloaded variadic deduction.
* pt.c (try_one_overload): Remove asserts.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/variadic-unify-3.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
>From gcc-bugs-return-558760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 18:49:07 2017
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Subject: [Bug libstdc++/80137] [6/7 Regression] std::generate_canonical calls its generator a non-constant number of times
Date: Thu, 23 Mar 2017 18:49:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-23
Known to work| |5.4.0
Summary|std::generate_canonical |[6/7 Regression]
|calls its generator a |std::generate_canonical
|non-constant number of |calls its generator a
|times |non-constant number of
| |times
Ever confirmed|0 |1
Known to fail| |6.3.0, 7.0
>From gcc-bugs-return-558761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 19:09:18 2017
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From: "vmakarov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80148] [7 Regression] operand has impossible constraints
Date: Thu, 23 Mar 2017 19:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80148
--- Comment #4 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Thank you for reporting this.
Something is wrong with processing insns for reloads. The asm-insn hash 2 the
same operands mem[r263+12]. R263 is spilled for a reload. The mem becomes
invalid and r263 should be reloaded too. Instead, LRA goes to a spill sub-pass
changing the operands on mem[mem[sp+offset]], then it generates 2 reloads for
the both operands:
p1=mem[sp+offset]
p2=mem[sp+offset]
LRA can not figure out that p1 and p2 do not conflict and should be the same
(in LRA it is done on pseudo bases).
So the solution would be a generation of reloads for R263 before the spill
sub-pass.
When I find why does not it happen, I could say how much time will it take to
fix. If it is simple, the patch will be probably ready tomorrow.
>From gcc-bugs-return-558762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 19:52:44 2017
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From: "ienkovich at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/80162] New: ICE on invalid code (address of register variable)
Date: Thu, 23 Mar 2017 19:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80162
Bug ID: 80162
Summary: ICE on invalid code (address of register variable)
Product: gcc
Version: 7.0
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Looking at PR79990 I found that we can ICE on register variable usage even when
no CHKP is used.
Here is a possible testcase:
typedef int v8 __attribute__ ((vector_size(8)));
struct U {
v8 a;
v8 b;
};
register struct U u asm ("xmm0");
int *
foo (int i)
{
return &u.a[i];
}
$ gcc-build/bin/gcc pr79990-2.c -S
pr79990-2.c:8:19: warning: call-clobbered register used for global register
variable
register struct U u asm ("xmm0");
^
pr79990-2.c: In function ‘foo’:
pr79990-2.c:13:10: internal compiler error: in expand_expr_addr_expr_1, at
expr.c:7790
return &u.a[i];
^~~~~~~
0xab00d2 expand_expr_addr_expr_1
../../gcc/gcc/expr.c:7790
0xab04d9 expand_expr_addr_expr_1
../../gcc/gcc/expr.c:7828
0xab0984 expand_expr_addr_expr
../../gcc/gcc/expr.c:7904
0xabe143 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/gcc/expr.c:11047
0xab0df5 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
../../gcc/gcc/expr.c:8072
0xaa7ccd store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
../../gcc/gcc/expr.c:5552
0xaa6616 expand_assignment(tree_node*, tree_node*, bool)
../../gcc/gcc/expr.c:5321
0x946a94 expand_gimple_stmt_1
../../gcc/gcc/cfgexpand.c:3641
0x946e9c expand_gimple_stmt
../../gcc/gcc/cfgexpand.c:3737
0x94e94d expand_gimple_basic_block
../../gcc/gcc/cfgexpand.c:5744
0x9503ff execute
../../gcc/gcc/cfgexpand.c:6357
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 translation/79423] Translation of warnings breaks IDE parsing of output
Date: Thu, 23 Mar 2017 19:58:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-03-23
Assignee|unassigned at gcc dot gnu.org |dmalcolm at gcc dot gnu.org
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Discussion of this on the gcc mailing list:
https://gcc.gnu.org/ml/gcc/2017-03/msg00108.html
which suggested that an environment variable would be better for IDE
integration:
https://gcc.gnu.org/ml/gcc/2017-03/msg00127.html
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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/80163] New: ICE on hopefully valid code
Date: Thu, 23 Mar 2017 20:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80163
Bug ID: 80163
Summary: ICE on hopefully valid code
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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Following snippet ICEs:
$ cat ice.cpp
void
c ()
{
a:
b:;
static __int128_t d = (long) &&a - (long) &&b;
}
$ gcc ice.c
ice.c:7:1: internal compiler error: in assemble_integer, at varasm.c:2754
}
^
0x130b70d assemble_integer(rtx_def*, unsigned int, unsigned int, int)
../../gcc/varasm.c:2754
0x131253f output_constant
../../gcc/varasm.c:4804
0x1309a39 assemble_variable_contents
../../gcc/varasm.c:2083
0x130a499 assemble_variable(tree_node*, int, int, int)
../../gcc/varasm.c:2259
0x13221a8 varpool_node::assemble_decl()
../../gcc/varpool.c:588
0x9ea9c4 output_in_order
../../gcc/cgraphunit.c:2285
0x9eb091 symbol_table::compile()
../../gcc/cgraphunit.c:2525
0x9eb2e6 symbol_table::finalize_compilation_unit()
../../gcc/cgraphunit.c:2621
All releases I have ICE (4.5.0+), both clang and ICC accept the code.
>From gcc-bugs-return-558765-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 20:09:47 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80164] New: ICE in gfc_format_decoder at gcc/fortran/error.c:933
Date: Thu, 23 Mar 2017 20:09:00 -0000
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Bug ID: 80164
Summary: ICE in gfc_format_decoder at gcc/fortran/error.c:933
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
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All releases I have do ICE on:
$ gfortran
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/where_operator_assign_3.f90
-Warray-temporaries
gfortran
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/where_operator_assign_3.f90
-Warray-temporaries
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/where_operator_assign_3.f90:58:0:
x = (/a (0, "one"),a (0, "two"),a (0, "three"),a (0, "four")/)
Segmentation fault
0xff34f2 crash_signal
../../gcc/toplev.c:337
0x838b8a gfc_format_decoder
../../gcc/fortran/error.c:933
0x1b66896 pp_format(pretty_printer*, text_info*)
../../gcc/pretty-print.c:679
0x1b5300c diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
../../gcc/diagnostic.c:961
0x8385f0 gfc_warning
../../gcc/fortran/error.c:792
0x83875a gfc_warning(int, char const*, ...)
../../gcc/fortran/error.c:823
0x9258ca gfc_trans_create_temp_array(stmtblock_t*, stmtblock_t*, gfc_ss*,
tree_node*, tree_node*, bool, bool, bool, locus*)
../../gcc/fortran/trans-array.c:1044
0x928fe6 trans_array_constructor
../../gcc/fortran/trans-array.c:2382
0x929a09 gfc_add_loop_ss_code
../../gcc/fortran/trans-array.c:2664
0x930404 gfc_conv_loop_setup(gfc_loopinfo*, locus*)
../../gcc/fortran/trans-array.c:4915
0x9c411f gfc_trans_call(gfc_code*, bool, tree_node*, tree_node*, bool)
../../gcc/fortran/trans-stmt.c:455
0x921eff trans_code
../../gcc/fortran/trans.c:1896
0x9222fe gfc_trans_code(gfc_code*)
../../gcc/fortran/trans.c:2128
0x95cf7d gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6332
0x922342 gfc_generate_code(gfc_namespace*)
../../gcc/fortran/trans.c:2145
0x8b46ff translate_all_program_units
../../gcc/fortran/parse.c:6074
0x8b4d0f gfc_parse_file()
../../gcc/fortran/parse.c:6274
0x90aedd gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug c++/77339] [5/6/7 Regression] ICE on invalid C++ code on x86_64-linux-gnu: in cp_parser_type_name, at cp/parser.c:16532
Date: Thu, 23 Mar 2017 20:19:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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>From gcc-bugs-return-558767-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 20:37:22 2017
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/78496] [7 Regression] Missed opportunities for jump threading
Date: Thu, 23 Mar 2017 20:37:00 -0000
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--- Comment #6 from Jeffrey A. Law <law at redhat dot com> ---
So I've got a hack that allows me to evaluate the effect of the last example
from c#5. So let's look at how the number of realized jump threads is affected
by the various tweaks I'm playing with:
VRP1 DOM2 DOM3 VRP2 thread{1,2,3,4}
base 6 9 0 0 0
p1 27 9 3 0 0
p2 30 6 0 21 0
p3 51 6 0 0 0
p4 51 6 0 0 6
VRP/DOM/thread columns count the number of jump threads realized by that pass.
p1 defers simplification of conditionals until after VRP threading is done.
It's clearly finding many previously missed jump threads and even exposes some
new opportunities for DOM3.
p2 simplifies ASSERT_EXPRs from relational to equality tests. It moves a small
number of jump threads from DOM into VRP1, and also picks up a ton of new jump
threads to VRP2.
p3 catches the case in the last example of c#5. It moves all those cases
exposed for VRP2 by patch #2 to occur in VRP1.
p4 retunes the FSM threader slightly. I'm still experimenting here, but it
does catch some stuff that was previously missed *and* exposes some new
opportunities. Ie, it catches stuff in thread2 and exposes stuff for thread3.
It's pretty clear that the patches can significantly improve the jump threading
we're doing for this testcase and do so early in the pipeline, where they're
the most beneficial.
We don't have a good description of the primary effect we're looking for, but
I'll guess that we're finding partial redundancies for those edges with
constant PHI arguments. Many of those should just go away completely. If we
look at the pre dumps, we start with 278 partial redundancies. The first patch
drops that to 73. The second patch drops it further to 61 where it stabilizes.
So we're certainly seeing a lot fewer partial redundancies.
>From gcc-bugs-return-558768-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 20:41:12 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/80162] [5/6/7 Regression] ICE on invalid code (address of register variable)
Date: Thu, 23 Mar 2017 20:41:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-23
CC| |marxin at gcc dot gnu.org
Summary|ICE on invalid code |[5/6/7 Regression] ICE on
|(address of register |invalid code (address of
|variable) |register variable)
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with 4.8.0, before that GCC reports:
pr80162.c:8:19: error: data type of ‘u’ isn’t suitable for a register
>From gcc-bugs-return-558769-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 20:56:58 2017
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From: "jeff.science at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80161] const argument hidden from AVX intrinsics due to OpenMP outlining
Date: Thu, 23 Mar 2017 20:56:00 -0000
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--- Comment #2 from Jeff Hammond <jeff.science at gmail dot com> ---
Fair point, but the error is "error: the last argument must be scale 1, 2, 4,
8" and "const int scale = 1" sure seems like it should be interpreted by the
compiler as "1", given "scale" has local scope (the error persists even after I
move it inside the parallel region).
And if the compiler is enforcing the lack of const variables in C, should it
not do so consistently, and not just when OpenMP is used? Why does OpenMP
prevent the compiler from seeing that scale=1, even if const is not there?
>From gcc-bugs-return-558770-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 21:17:42 2017
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From: "vmakarov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80160] [7 regression] operand has impossible constraints
Date: Thu, 23 Mar 2017 21:17:00 -0000
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--- Comment #5 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Bernd Schmidt from comment #4)
> Perhaps this.
>
> Index: lra-assigns.c
> ===================================================================
> --- lra-assigns.c (revision 246226)
> +++ lra-assigns.c (working copy)
> @@ -908,7 +908,8 @@ must_not_spill_p (unsigned spill_regno)
> does not solve the general case where existing reloads fully
> cover a limited register class. */
> if (!bitmap_bit_p (&non_reload_pseudos, spill_regno)
> - && reg_class_size [reg_preferred_class (spill_regno)] == 1)
> + && reg_class_size [reg_preferred_class (spill_regno)] == 1
> + && reg_alternate_class (spill_regno) == NO_REGS)
> return true;
> return false;
> }
It looks OK to me. Bernd, please, go ahead and commit it (of course after
successful testing).
Thanks for the fast response.
>From gcc-bugs-return-558771-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 21:18:08 2017
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From: "vmakarov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/80159] [7 regression] gcc takes very long time with -Os
Date: Thu, 23 Mar 2017 21:18:00 -0000
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--- Comment #3 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Either patch proposed by Bernd for PR80160 or my patch on which I am working
for PR80148 will solve the problem.
>From gcc-bugs-return-558772-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 21:21:03 2017
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From: "vmakarov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80148] [7 Regression] operand has impossible constraints
Date: Thu, 23 Mar 2017 21:21:00 -0000
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--- Comment #5 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
The fix proposed by Bernd for PR80160 does not solve the problem. So I am
continuing to work on the patch.
>From gcc-bugs-return-558773-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 21:41:44 2017
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Subject: [Bug fortran/57924] -Werror -Warray-temporaries -Wno-error=array-temporaries fails on array temporary warnings
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
AFAICT this seems to be fixed since at least for 5.4.0:
[Book15] f90/bug% gfortran-fsf-5 pr57924.f90 -Warray-temporaries -Werror
pr57924.f90:12:13:
CALL foo(q)
1
Error: Creating array temporary at (1) [-Werror=array-temporaries]
f951: all warnings being treated as errors
[Book15] f90/bug% gfortran-fsf-5 pr57924.f90 -Warray-temporaries -Werror
-Wno-error=array-temporaries
pr57924.f90:12:13:
CALL foo(q)
1
Warning: Creating array temporary at (1) [-Warray-temporaries]
Am I correct to understand that it is the expected behavior?
>From gcc-bugs-return-558774-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 21:45:28 2017
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--- Comment #2 from trashyankes at wp dot pl ---
```
#include <random>
int foo (std::mt19937* x)
{
std::uniform_int_distribution<int> k(0, 99);
for (auto i = 0; i < 1'000'000'000; ++i)
{
std::uniform_int_distribution<int> y(0, 99);
volatile auto r = k(*x, k.param()); //change any of `k` to `y` simplify
code
}
}
```
This `operator()` do not use any members fields of `k` directly, therefore `y`
should give exactly same results but it isn't. This function depends on `k`
even if do not need to do this.
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Subject: [Bug fortran/80164] ICE in gfc_format_decoder at gcc/fortran/error.c:933
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-03-23
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of pr79888?
Regtesting with
RUNTESTFLAGS="--target_board=unix'{-m32/-Warray-temporaries,-m64/-Warray-temporaries}'",
I see
FAIL: gfortran.dg/where_operator_assign_2.f90 -O (internal compiler error)
FAIL: gfortran.dg/where_operator_assign_3.f90 -O (internal compiler error)
FAIL: gfortran.dg/where_operator_assign_1.f90 -O (internal compiler error)
FAIL: gfortran.dg/ieee/ieee_1.F90 -O* (internal compiler error)
FAIL: gfortran.dg/ieee/large_3.F90 -O* (internal compiler error)
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Subject: [Bug fortran/80164] ICE in gfc_format_decoder at gcc/fortran/error.c:933
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #2 from kargl at gcc dot gnu.org ---
Index: trans-stmt.c
===================================================================
--- trans-stmt.c (revision 246099)
+++ trans-stmt.c (working copy)
@@ -452,7 +452,11 @@ gfc_trans_call (gfc_code * code, bool de
subscripts. This could be prevented in the elemental case
as temporaries are handled separatedly
(below in gfc_conv_elemental_dependencies). */
- gfc_conv_loop_setup (&loop, &code->expr1->where);
+ if (code->expr1)
+ gfc_conv_loop_setup (&loop, &code->expr1->where);
+ else
+ gfc_conv_loop_setup (&loop, &code->loc);
+
gfc_mark_ss_chain_used (ss, 1);
/* Convert the arguments, checking for dependencies. */
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--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #5)
1
> Warning: Creating array temporary at (1) [-Warray-temporaries]
>
> Am I correct to understand that it is the expected behavior?
Yes, this is how it should be.
I think this PR can be closed as FIXED.
>From gcc-bugs-return-558778-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 22:15:54 2017
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Subject: [Bug fortran/57924] -Werror -Warray-temporaries -Wno-error=array-temporaries fails on array temporary warnings
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I think this PR can be closed as FIXED.
Agreed!
>From gcc-bugs-return-558779-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 22:32:41 2017
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Subject: [Bug c++/80150] [6 Regression] Internal compiler error when in in try_one_overload, at cp/pt.c:18903
Date: Thu, 23 Mar 2017 22:32:00 -0000
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--- Comment #5 from Gordon Brown <gordon at codeplay dot com> ---
That's great, thanks Jason.
>From gcc-bugs-return-558780-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 22:42:12 2017
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Subject: [Bug fortran/79888] ICE in gfc_warning with -Warray-temporaries
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of pr80164.
*** This bug has been marked as a duplicate of bug 80164 ***
>From gcc-bugs-return-558781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 22:42:12 2017
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Subject: [Bug fortran/80164] ICE in gfc_format_decoder at gcc/fortran/error.c:933
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 79888 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-558782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 22:48:52 2017
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Subject: [Bug fortran/80164] ICE in gfc_format_decoder at gcc/fortran/error.c:933
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The patch in comment 2 fixes the failures
FAIL: gfortran.dg/where_operator_assign_2.f90 -O (internal compiler error)
FAIL: gfortran.dg/where_operator_assign_3.f90 -O (internal compiler error)
FAIL: gfortran.dg/where_operator_assign_1.f90 -O (internal compiler error)
but not
FAIL: gfortran.dg/ieee/ieee_1.F90 -O* (internal compiler error)
FAIL: gfortran.dg/ieee/large_3.F90 -O* (internal compiler error)
The additional errors are
/opt/gcc/_clean/gcc/testsuite/gfortran.dg/where_operator_assign_1.f90:82:69:
pv((2_I4*i-1_I4):(2_I4*i))= iaef((/(2_I4*i-1_I4),(2_I4*i)/))
1
Warning: Creating array temporary at (1) [-Warray-temporaries]
/opt/gcc/_clean/gcc/testsuite/gfortran.dg/where_operator_assign_2.f90:46:45:
x = (/a (0, 1),a (0, 2),a (0, 3),a (0, 4)/)
1
Would it be possible to have a better location?
>From gcc-bugs-return-558783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 23:05:19 2017
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Subject: [Bug fortran/68040] [5/6/7 Regression] Internal compiler error: Error reporting routines re-entered.
Date: Thu, 23 Mar 2017 23:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68040
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> ---
This PR has been fixed between r246078 (2017-03-12, ICE) and r246216
(2017-03-17, compiles), likely r246203 (pr79886).
Closing.
>From gcc-bugs-return-558784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 23 23:17:51 2017
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Subject: [Bug fortran/80164] ICE in gfc_format_decoder at gcc/fortran/error.c:933
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--- Comment #5 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Thu, Mar 23, 2017 at 10:48:20PM +0000, dominiq at lps dot ens.fr wrote:
>
> The additional errors are
>
> /opt/gcc/_clean/gcc/testsuite/gfortran.dg/where_operator_assign_1.f90:82:69:
>
> pv((2_I4*i-1_I4):(2_I4*i))= iaef((/(2_I4*i-1_I4),(2_I4*i)/))
> 1
> Warning: Creating array temporary at (1) [-Warray-temporaries]
>
> /opt/gcc/_clean/gcc/testsuite/gfortran.dg/where_operator_assign_2.f90:46:45:
>
> x = (/a (0, 1),a (0, 2),a (0, 3),a (0, 4)/)
> 1
>
These aren't errors. These are warnings caused by the
questionable addition of a specious warning option
wrecklessly added to the compiler options for testcases
that were never intended to be used in testing that
warning option. gfortran created a temporary array
in these testcases. So what?
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Subject: [Bug fortran/79852] diagnostics should not end with exclamation mark
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
See also pr79840.
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Subject: [Bug fortran/79840] Inconsistent exclamation mark in diagnostic
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-03-23
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
See also pr79852.
Patch at https://gcc.gnu.org/ml/fortran/2017-03/msg00064.html.
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From: "gcc-bugs at marehr dot dialup.fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/80165] New: Constexpr tuple of variant doesn't work
Date: Fri, 24 Mar 2017 01:06:00 -0000
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Bug ID: 80165
Summary: Constexpr tuple of variant doesn't work
Product: gcc
Version: 7.0.1
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Created attachment 41038
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41038&action=edit
Example that a tuple of a variant can't be constructed
Hi gcc-team,
first of all, I'm not sure if this bug(?) should be filed here. If not please
move it to the correct component.
I currently was trying to create a constexpr tuple of a constexpr variant as
value, which apparently doesn't work, even though I can create a constexpr
variant.
I get the following error:
```
In file included from bug_gcc_constexpr_tuple_of_variant.cpp:2:0:
/usr/local/bin/gcc-7/include/c++/7.0.1/tuple: In function ‘int main()’:
bug_gcc_constexpr_tuple_of_variant.cpp:8:51: in constexpr expansion of
‘std::make_tuple(_Elements&& ...) [with _Elements = {const std
::variant<unsigned char, short unsigned int, unsigned int>&}]()’
bug_gcc_constexpr_tuple_of_variant.cpp:8:51: in constexpr expansion of
‘std::tuple<std::variant<unsigned char, short unsigned int, un
signed int> >(std::forward<const std::variant<unsigned char, short unsigned
int, unsigned int>&>(__args#0))’
/usr/local/bin/gcc-7/include/c++/7.0.1/tuple:609:33: in constexpr expansion
of ‘((std::tuple<std::variant<unsigned char, short unsign
ed int, unsigned int> >*)this)->std::tuple<std::variant<unsigned char, short
unsigned int, unsigned int> >::<anonymous>.std::_Tuple_imp
l<0, std::variant<unsigned char, short unsigned int, unsigned int>
>::_Tuple_impl(__elements#0)’
/usr/local/bin/gcc-7/include/c++/7.0.1/tuple:361:21: error: ‘constexpr
std::_Head_base<_Idx, _Head, false>::_Head_base(const _Head&) [w
ith long unsigned int _Idx = 0; _Head = std::variant<unsigned char, short
unsigned int, unsigned int>]’ called in a constant expression
: _Base(__head) { }
^
/usr/local/bin/gcc-7/include/c++/7.0.1/tuple:125:17: note: ‘constexpr
std::_Head_base<_Idx, _Head, false>::_Head_base(const _Head&) [wi
th long unsigned int _Idx = 0; _Head = std::variant<unsigned char, short
unsigned int, unsigned int>]’ is not usable as a constexpr fun
ction because:
constexpr _Head_base(const _Head& __h)
^~~~~~~~~~
/usr/local/bin/gcc-7/include/c++/7.0.1/tuple:126:25: error: call to
non-constexpr function ‘std::variant<_Types>::variant(const std::va
riant<_Types>&) [with _Types = {unsigned char, short unsigned int, unsigned
int}]’
: _M_head_impl(__h) { }
^
In file included from bug_gcc_constexpr_tuple_of_variant.cpp:3:0:
/usr/local/bin/gcc-7/include/c++/7.0.1/variant:932:7: note:
‘std::variant<_Types>::variant(const std::variant<_Types>&) [with _Types =
{unsigned char, short unsigned int, unsigned int}]’ is not usable as a
constexpr function because:
variant(const variant&) = default;
^~~~~~~
/usr/local/bin/gcc-7/include/c++/7.0.1/variant:399:7: note: defaulted
constructor calls non-constexpr ‘std::__detail::__variant::_Varia
nt_base<_Types>::_Variant_base(const
std::__detail::__variant::_Variant_base<_Types>&) [with _Types = {unsigned
char, short unsigned in
t, unsigned int}]’
_Variant_base(const _Variant_base& __rhs)
^~~~~~~~~~~~~
zsh: exit 1 g++-7 -std=c++1z -Wall -Wextra
bug_gcc_constexpr_tuple_of_variant.cpp
```
Maybe you can tell me what I'm doing wrong.
Best regards
marehr
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chihin ko <chihin.ko at oracle dot com> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #4 from chihin ko <chihin.ko at oracle dot com> ---
g++ 5.4.0 on Solaris 11 does not have this problem.
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Subject: [Bug c++/56251] no DW_AT_const_value for static const member of a template class
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chihin ko <chihin.ko at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #8 from chihin ko <chihin.ko at oracle dot com> ---
Verified on Solaris 11
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Subject: [Bug testsuite/80092] Add effective-target keywords for unsupported nvptx features
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--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Fri Mar 24 06:28:12 2017
New Revision: 246433
URL: https://gcc.gnu.org/viewcvs?rev=246433&root=gcc&view=rev
Log:
Add missing dg-require-effective-target alloca in gcc testsuite
2017-03-24 Tom de Vries <tom@codesourcery.com>
PR testsuite/80092
* gcc.dg/Walloca-7.c: Add dg-require-effective-target alloca.
* gcc.dg/Walloca-12.c: Same.
* gcc.dg/attr-alloc_size-8.c: Same.
* gcc.dg/Walloca-4.c: Same.
* gcc.dg/Walloca-8.c: Same.
* gcc.dg/Walloca-13.c: Same.
* gcc.dg/Walloca-14.c: Same.
* gcc.dg/attr-alloc_size-9.c: Same.
* gcc.dg/Walloca-1.c: Same.
* gcc.dg/tree-ssa/builtin-sprintf-warn-3.c: Same.
* gcc.dg/Walloca-5.c: Same.
* gcc.dg/Walloca-10.c: Same.
* gcc.dg/Walloca-9.c: Same.
* gcc.dg/attr-alloc_size-6.c: Same.
* gcc.dg/Wvla-larger-than-1.c: Same.
* gcc.dg/torture/pr71881.c: Same.
* gcc.dg/torture/pr71901.c: Same.
* gcc.dg/torture/pr78742.c: Same.
* gcc.dg/builtin-alloc-size.c: Same.
* gcc.dg/Walloca-2.c: Same.
* gcc.dg/Walloca-6.c: Same.
* gcc.dg/Walloca-11.c: Same.
* gcc.dg/attr-alloc_size-7.c: Same.
* gcc.dg/Wvla-larger-than-2.c: Same.
* gcc.dg/Walloca-3.c: Same.
* c-c++-common/Wimplicit-fallthrough-7.c: Same.
* gcc.c-torture/compile/pr79413.c: Same.
* gcc.c-torture/compile/pr78439.c: Same.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-7.c
trunk/gcc/testsuite/gcc.c-torture/compile/pr78439.c
trunk/gcc/testsuite/gcc.c-torture/compile/pr79413.c
trunk/gcc/testsuite/gcc.dg/Walloca-1.c
trunk/gcc/testsuite/gcc.dg/Walloca-10.c
trunk/gcc/testsuite/gcc.dg/Walloca-11.c
trunk/gcc/testsuite/gcc.dg/Walloca-12.c
trunk/gcc/testsuite/gcc.dg/Walloca-13.c
trunk/gcc/testsuite/gcc.dg/Walloca-14.c
trunk/gcc/testsuite/gcc.dg/Walloca-2.c
trunk/gcc/testsuite/gcc.dg/Walloca-3.c
trunk/gcc/testsuite/gcc.dg/Walloca-4.c
trunk/gcc/testsuite/gcc.dg/Walloca-5.c
trunk/gcc/testsuite/gcc.dg/Walloca-6.c
trunk/gcc/testsuite/gcc.dg/Walloca-7.c
trunk/gcc/testsuite/gcc.dg/Walloca-8.c
trunk/gcc/testsuite/gcc.dg/Walloca-9.c
trunk/gcc/testsuite/gcc.dg/Wvla-larger-than-1.c
trunk/gcc/testsuite/gcc.dg/Wvla-larger-than-2.c
trunk/gcc/testsuite/gcc.dg/attr-alloc_size-6.c
trunk/gcc/testsuite/gcc.dg/attr-alloc_size-7.c
trunk/gcc/testsuite/gcc.dg/attr-alloc_size-8.c
trunk/gcc/testsuite/gcc.dg/attr-alloc_size-9.c
trunk/gcc/testsuite/gcc.dg/builtin-alloc-size.c
trunk/gcc/testsuite/gcc.dg/torture/pr71881.c
trunk/gcc/testsuite/gcc.dg/torture/pr71901.c
trunk/gcc/testsuite/gcc.dg/torture/pr78742.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-3.c
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Subject: [Bug testsuite/80092] Add effective-target keywords for unsupported nvptx features
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80092
--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Fri Mar 24 06:28:42 2017
New Revision: 246434
URL: https://gcc.gnu.org/viewcvs?rev=246434&root=gcc&view=rev
Log:
Require effective target nonlocal_goto in pr79244.c
2017-03-24 Tom de Vries <tom@codesourcery.com>
PR testsuite/80092
* gcc.dg/torture/pr79244.c: Add dg-require-effective-target
nonlocal_goto.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/torture/pr79244.c
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Subject: [Bug testsuite/80092] Add effective-target keywords for unsupported nvptx features
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80092
--- Comment #6 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Fri Mar 24 06:28:53 2017
New Revision: 246435
URL: https://gcc.gnu.org/viewcvs?rev=246435&root=gcc&view=rev
Log:
Require effective target indirect_jump in Wimplicit-fallthrough-34.c
2017-03-24 Tom de Vries <tom@codesourcery.com>
PR testsuite/80092
* c-c++-common/Wimplicit-fallthrough-34.c: Add
dg-require-effective-target indirect_jumps.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-34.c
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Subject: [Bug testsuite/80092] Add effective-target keywords for unsupported nvptx features
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80092
--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Fri Mar 24 06:29:06 2017
New Revision: 246436
URL: https://gcc.gnu.org/viewcvs?rev=246436&root=gcc&view=rev
Log:
Require effective target global_constructor for two testcases
2017-03-24 Tom de Vries <tom@codesourcery.com>
PR testsuite/80092
* gcc.dg/no_profile_instrument_function-attr-1.c: Add
dg-require-effective-target global_constructor.
* gcc.dg/tls/emutls-2.c: Same.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/no_profile_instrument_function-attr-1.c
trunk/gcc/testsuite/gcc.dg/tls/emutls-2.c
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Subject: [Bug testsuite/80092] Add effective-target keywords for unsupported nvptx features
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--- Comment #8 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Fri Mar 24 06:46:05 2017
New Revision: 246437
URL: https://gcc.gnu.org/viewcvs?rev=246437&root=gcc&view=rev
Log:
Backport "Add missing dg-require-effective-target alloca in gcc testsuite"
2017-03-24 Tom de Vries <tom@codesourcery.com>
backport from trunk:
2017-03-24 Tom de Vries <tom@codesourcery.com>
PR testsuite/80092
* gcc.dg/torture/pr71881.c: Add dg-require-effective-target alloca.
* gcc.dg/torture/pr78742.c: Same.
Modified:
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr71881.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr78742.c
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Subject: [Bug middle-end/80162] [5/6/7 Regression] ICE on invalid code (address of register variable)
Date: Fri, 24 Mar 2017 08:27:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r190492.
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #33 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
From IRC discussion today about this:
<jakub> so, for PR79671 would you be ok with say new may_alias_field attribute
allowed on FIELD_DECLs only that forces has_zero_child on the containing type?
<jakub> or may_alias_fields type attribute that would force has_zero_child on
that type
<jakub> I have no idea what else boost/libstdc++ could use for the mess they
want/need to do
<richi> didn't I provide a solution for them?
<richi> IMHO the bug is still INVALID
<richi> not sure if adding has_zero_child will have any effect - the same issue
exists for B with char[] array member you placement new into
<jakub> the problem with that solution is that you need to move it to the
outermost type, say if somebody puts that weirdo boost class into
some other class, then assignments will not work again
<richi> iff the FE decides that copying PODs is semantically equivalent to
memcpy (alias-wise) then it has to emit it that way (but as said in comment #28
there is no evidence the standard suggests that)
<richi> yes, because C++ doesnt' work that way
<richi> it's very simple...
<richi> and I bet adding ->has_zero_child = 1 to B doesn't actually help in
general
<jakub> my understanding was that jason disagrees with that
<richi> I see no comment in the bug from jason
<jakub> let's discuss it later today when jason/jwakely are both around
<richi> the C++ FE can simply use alias-set zero for POD assignments then
<richi> thus change c = *p; to MEM[&c, alias-set-zero] = MEM[p,
alias-set-zero];
<richi> the important thing to notice is that it is 'c = *p' that is undefined
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Subject: [Bug tree-optimization/80167] New: [6/7 Regression] ICE in translate_isl_ast_to_gimple::is_valid_rename at gcc/graphite-isl-ast-to-gimple.c:1139
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80167
Bug ID: 80167
Summary: [6/7 Regression] ICE in
translate_isl_ast_to_gimple::is_valid_rename at
gcc/graphite-isl-ast-to-gimple.c:1139
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Started with r229889, we ICE on:
$ cat /tmp/tmpium7rf86.i
typedef struct
{
short a;
short b;
short c
} d;
d e[];
f[8];
g (d *i)
{
int h = 0;
for (; h < 28; h++)
e[h].a = e[h].b = i[h].a;
h = 0;
for (; h < 8; h++)
f[h] = i[h].b + i[h].c;
h = 0;
for (; h < 8; h++)
f[h] = i[h].b;
}
$ gcc -O2 -fno-tree-pta -floop-nest-optimize /tmp/tmpium7rf86.i
/tmp/tmpium7rf86.i:6:1: warning: no semicolon at end of struct or union
} d;
^
/tmp/tmpium7rf86.i:8:1: warning: data definition has no type or storage class
f[8];
^
/tmp/tmpium7rf86.i:8:1: warning: type defaults to ‘int’ in declaration of ‘f’
[-Wimplicit-int]
/tmp/tmpium7rf86.i:9:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
g (d *i)
^
/tmp/tmpium7rf86.i:7:3: warning: array ‘e’ assumed to have one element
d e[];
^
/tmp/tmpium7rf86.i: In function ‘g’:
/tmp/tmpium7rf86.i:13:21: warning: iteration 1 invokes undefined behavior
[-Waggressive-loop-optimizations]
e[h].a = e[h].b = i[h].a;
~~~~~~~^~~~~~~~
/tmp/tmpium7rf86.i:12:3: note: within this loop
for (; h < 28; h++)
^~~
/tmp/tmpium7rf86.i:9:1: internal compiler error: Segmentation fault
g (d *i)
^
0xf444d0 crash_signal
../../gcc/toplev.c:337
0xa3734c dominated_by_p(cdi_direction, basic_block_def const*, basic_block_def
const*)
../../gcc/dominance.c:1117
0x19649cb translate_isl_ast_to_gimple::is_valid_rename(tree_node*,
basic_block_def*, basic_block_def*, phi_node_kind, tree_node*,
basic_block_def*) const
../../gcc/graphite-isl-ast-to-gimple.c:1139
0x1964b95 translate_isl_ast_to_gimple::get_rename(basic_block_def*, tree_node*,
basic_block_def*, phi_node_kind) const
../../gcc/graphite-isl-ast-to-gimple.c:1179
0x19666d1 translate_isl_ast_to_gimple::rename_uses(gimple*,
gimple_stmt_iterator*, basic_block_def*, loop*, vec<tree_node*, va_heap,
vl_ptr>)
../../gcc/graphite-isl-ast-to-gimple.c:1676
0x1968d0d
translate_isl_ast_to_gimple::graphite_copy_stmts_from_block(basic_block_def*,
basic_block_def*, vec<tree_node*, va_heap, vl_ptr>)
../../gcc/graphite-isl-ast-to-gimple.c:2572
0x19694a5
translate_isl_ast_to_gimple::copy_bb_and_scalar_dependences(basic_block_def*,
edge_def*, vec<tree_node*, va_heap, vl_ptr>)
../../gcc/graphite-isl-ast-to-gimple.c:2785
0x1964171
translate_isl_ast_to_gimple::translate_isl_ast_node_user(isl_ast_node*,
edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/graphite-isl-ast-to-gimple.c:904
0x1964545 translate_isl_ast_to_gimple::translate_isl_ast(loop*, isl_ast_node*,
edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/graphite-isl-ast-to-gimple.c:1008
0x1964400 translate_isl_ast_to_gimple::translate_isl_ast_node_if(loop*,
isl_ast_node*, edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/graphite-isl-ast-to-gimple.c:972
0x1964528 translate_isl_ast_to_gimple::translate_isl_ast(loop*, isl_ast_node*,
edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/graphite-isl-ast-to-gimple.c:1005
0x196428b translate_isl_ast_to_gimple::translate_isl_ast_node_block(loop*,
isl_ast_node*, edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/graphite-isl-ast-to-gimple.c:933
0x1964566 translate_isl_ast_to_gimple::translate_isl_ast(loop*, isl_ast_node*,
edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/graphite-isl-ast-to-gimple.c:1012
0x196385d translate_isl_ast_to_gimple::translate_isl_ast_for_loop(loop*,
isl_ast_node*, edge_def*, tree_node*, tree_node*, tree_node*, std::map<isl_id*,
tree_node*, std::less<isl_id*>, std::allocator<std::pair<isl_id* const,
tree_node*> > >&)
../../gcc/graphite-isl-ast-to-gimple.c:653
0x1963dc1 translate_isl_ast_to_gimple::translate_isl_ast_node_for(loop*,
isl_ast_node*, edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/graphite-isl-ast-to-gimple.c:815
0x1964504 translate_isl_ast_to_gimple::translate_isl_ast(loop*, isl_ast_node*,
edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/graphite-isl-ast-to-gimple.c:1001
0x196428b translate_isl_ast_to_gimple::translate_isl_ast_node_block(loop*,
isl_ast_node*, edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/graphite-isl-ast-to-gimple.c:933
0x1964566 translate_isl_ast_to_gimple::translate_isl_ast(loop*, isl_ast_node*,
edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/graphite-isl-ast-to-gimple.c:1012
0x1969eb6 graphite_regenerate_ast_isl(scop*)
../../gcc/graphite-isl-ast-to-gimple.c:3019
0x1960e66 graphite_transform_loops()
../../gcc/graphite.c:330
>From gcc-bugs-return-558798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 09:09:42 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Fri, 24 Mar 2017 09:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
--- Comment #34 from Richard Biener <rguenth at gcc dot gnu.org> ---
C++14 12.8/16 says
"The implicitly-defined copy/move constructor for a union X copies the object
representation (3.9) of X."
3.9/4 says
"The object representation of an object of type T is the sequence of N unsigned
char objects... For trivially copyable types, the value representation is a
set of bits in the object representation that determines a value,..."
this suggests that the copying should work but the C++ FE may not simply
elide the copy construction by emitting
c = *p;
because that does _not_ implement memcpy semantics for the union member.
Note the above may not apply at all here if B is POD and thus the assignment
is an assignment of PODs (I don't know all of the standard).
>From gcc-bugs-return-558799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 09:13:10 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Fri, 24 Mar 2017 09:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
--- Comment #35 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #34)
> C++14 12.8/16 says
>
> "The implicitly-defined copy/move constructor for a union X copies the
> object representation (3.9) of X."
>
> 3.9/4 says
>
> "The object representation of an object of type T is the sequence of N
> unsigned char objects... For trivially copyable types, the value
> representation is a set of bits in the object representation that determines
> a value,..."
>
> this suggests that the copying should work but the C++ FE may not simply
> elide the copy construction by emitting
>
> c = *p;
>
> because that does _not_ implement memcpy semantics for the union member.
>
> Note the above may not apply at all here if B is POD and thus the assignment
> is an assignment of PODs (I don't know all of the standard).
It would still conflict with the wording of 3.10/10 (that is, if 3.10/10
is fulfilled the middle-end handles the copying above correct).
>From gcc-bugs-return-558800-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 09:16:03 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/80168] New: [5/6/7 Regression] ICE in make_decl_rtl, at varasm.c:1311 w/ VLA and -fsanitizedress
Date: Fri, 24 Mar 2017 09:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80168
Bug ID: 80168
Summary: [5/6/7 Regression] ICE in make_decl_rtl, at
varasm.c:1311 w/ VLA and -fsanitize=address
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
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,
mpolacek at gcc dot gnu.org, msebor at gcc dot gnu.org
Target Milestone: ---
Following test-case ICEs starting from 4.9.0:
$ cat /tmp/tmpti5pzbsf.i
int a;
int b ()
{
typedef int c[a];
struct
{
c d;
int e : 4;
} f;
return f.e;
}
$ gcc -fsanitize=address /tmp/tmpti5pzbsf.i
/tmp/tmpti5pzbsf.i: In function ‘b’:
/tmp/tmpti5pzbsf.i:10:11: internal compiler error: in make_decl_rtl, at
varasm.c:1311
return f.e;
~^~
0x1307043 make_decl_rtl(tree_node*)
../../gcc/varasm.c:1307
0xb03304 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:9805
0xb04661 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:10042
0xafbad0 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
../../gcc/expr.c:8072
0xae2a67 expand_expr
../../gcc/expr.h:276
0xafca4b expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../gcc/expr.c:8314
0xb08e6c expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:11103
0xafbad0 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
../../gcc/expr.c:8072
0xae2a67 expand_expr
../../gcc/expr.h:276
0xafa7e2 expand_operands(tree_node*, tree_node*, rtx_def*, rtx_def**,
rtx_def**, expand_modifier)
../../gcc/expr.c:7672
0xaff189 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../gcc/expr.c:8791
0xb08e6c expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:11103
0xafbad0 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
../../gcc/expr.c:8072
0xae2a67 expand_expr
../../gcc/expr.h:276
0xafb24b expand_expr_addr_expr_1
../../gcc/expr.c:7836
0xafb659 expand_expr_addr_expr
../../gcc/expr.c:7903
0xb08d5e expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:11047
0xafbad0 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
../../gcc/expr.c:8072
0xaf2aec store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
../../gcc/expr.c:5552
0xaf1541 expand_assignment(tree_node*, tree_node*, bool)
../../gcc/expr.c:5321
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Subject: [Bug target/80162] [5/6/7 Regression] ICE on invalid code (address of register variable)
Date: Fri, 24 Mar 2017 09:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80162
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
Priority|P3 |P2
Component|middle-end |target
Target Milestone|--- |5.5
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Subject: [Bug middle-end/80161] const argument hidden from AVX intrinsics due to OpenMP outlining
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80161
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-24
Component|target |middle-end
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
OMP outlining happens too early and as it takes the address of the outlined
function most IPA propagation doesn't work. Not sure if it properly passes
scale by value rather than through the static chain.
It's a general issue of OMP I guess (disabling of IPA).
>From gcc-bugs-return-558803-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 09:26:07 2017
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Subject: [Bug target/80162] [5/6/7 Regression] ICE on invalid code (address of register variable)
Date: Fri, 24 Mar 2017 09:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80162
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41039
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41039&action=edit
gcc7-pr80162.patch
Untested fix. Will still need to verify the c-common change doesn't break
stuff. But I think we don't really ever mark DECL_HARD_REGISTER vars as
DECL_GIMPLE_REG_P, so if the comment explains the only reason for that, we
should be fine.
>From gcc-bugs-return-558804-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 09:36:59 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80167] [6/7 Regression] ICE in translate_isl_ast_to_gimple::is_valid_rename at gcc/graphite-isl-ast-to-gimple.c:1139
Date: Fri, 24 Mar 2017 09:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80167
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-24
Target Milestone|--- |6.4
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
#1 0x000000000191d29c in translate_isl_ast_to_gimple::is_valid_rename (
this=0x7fffffffd8c0, rename=<ssa_name 0x7ffff69f3240>,
def_bb=<basic_block 0x0>, use_bb=<basic_block 0x7ffff6a00d00 (34)>,
phi_kind=unknown_phi, old_name=<ssa_name 0x7ffff68adaf8>,
old_bb=<basic_block 0x7ffff68aec98 (6)>)
at
/space/rguenther/src/svn/gcc-7-branch/gcc/graphite-isl-ast-to-gimple.c:1139
1139 if (dominated_by_p (CDI_DOMINATORS, use_bb, def_bb))
def_bb is NULL because 'rename' is a default-def.
The rename looks odd to me, renaming _7 to i_25(D)? We register that from
#0 translate_isl_ast_to_gimple::set_rename (this=0x7fffffffd8c0,
old_name=<ssa_name 0x7ffff68adaf8>, expr=<ssa_name 0x7ffff69f3240>)
at
/space/rguenther/src/svn/gcc-7-branch/gcc/graphite-isl-ast-to-gimple.c:1259
#1 0x000000000191f2b3 in translate_isl_ast_to_gimple::rename_uses (
this=0x7fffffffd8c0, copy=<gimple_assign 0x7ffff6a070a0>,
gsi_tgt=0x7fffffffd390, old_bb=<basic_block 0x7ffff68aec98 (6)>,
loop=0x7ffff69ee210, iv_map=...)
at
/space/rguenther/src/svn/gcc-7-branch/gcc/graphite-isl-ast-to-gimple.c:1733
#2 0x00000000019215cd in
translate_isl_ast_to_gimple::graphite_copy_stmts_from_block
(this=0x7fffffffd8c0, bb=<basic_block 0x7ffff68aec98 (6)>,
new_bb=<basic_block 0x7ffff6a00d00 (34)>, iv_map=...)
at
/space/rguenther/src/svn/gcc-7-branch/gcc/graphite-isl-ast-to-gimple.c:2572
#3 0x0000000001921d9b in
translate_isl_ast_to_gimple::copy_bb_and_scalar_dependences
(this=0x7fffffffd8c0, bb=<basic_block 0x7ffff68aec98 (6)>,
next_e=<edge 0x7ffff68af9a0 (30 -> 34)>, iv_map=...)
at
/space/rguenther/src/svn/gcc-7-branch/gcc/graphite-isl-ast-to-gimple.c:2785
#4 0x000000000191ca30 in
translate_isl_ast_to_gimple::translate_isl_ast_node_user (this=0x7fffffffd8c0,
node=0x2a13da0,
hmm, might be still correct in this case.
Fix:
Index: gcc/graphite-isl-ast-to-gimple.c
===================================================================
--- gcc/graphite-isl-ast-to-gimple.c (revision 246437)
+++ gcc/graphite-isl-ast-to-gimple.c (working copy)
@@ -1123,6 +1123,9 @@ bool translate_isl_ast_to_gimple::
is_valid_rename (tree rename, basic_block def_bb, basic_block use_bb,
phi_node_kind phi_kind, tree old_name, basic_block old_bb)
const
{
+ if (SSA_NAME_IS_DEFAULT_DEF (rename))
+ return true;
+
/* The def of the rename must either dominate the uses or come from a
back-edge. Also the def must respect the loop closed ssa form. */
if (!is_loop_closed_ssa_use (use_bb, rename))
@@ -1178,6 +1181,7 @@ get_rename (basic_block new_bb, tree old
basic_block bb = gimple_bb (SSA_NAME_DEF_STMT (rename));
if (is_valid_rename (rename, bb, new_bb, phi_kind, old_name, old_bb)
&& (phi_kind == close_phi
+ || ! bb
|| flow_bb_inside_loop_p (bb->loop_father, new_bb)))
return rename;
return NULL_TREE;
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Subject: [Bug target/80162] [5/6/7 Regression] ICE on invalid code (address of register variable)
Date: Fri, 24 Mar 2017 09:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80162
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ugh, but that patch breaks:
typedef int v8 __attribute__ ((vector_size (32)));
register v8 u asm ("xmm7");
int
foo (int i)
{
return u[i];
}
int
bar (void)
{
return u[5];
}
We could perhaps add an optional argument to
c_mark_addressable/cxx_mark_addressable that would be true when called to build
ARRAY_REF (in that case we wouldn't want to see through VCEs) and when actually
taking address (in that case we do want that).
>From gcc-bugs-return-558806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 09:42:01 2017
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From: "dawid_jurek at vp dot pl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80169] New: G++ (cc1plus) hangs forever compiling template when size of array is enormous
Date: Fri, 24 Mar 2017 09:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80169
Bug ID: 80169
Summary: G++ (cc1plus) hangs forever compiling template when
size of array is enormous
Product: gcc
Version: 6.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dawid_jurek at vp dot pl
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0. Gcc version.
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc-multilib/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
Thread model: posix
gcc version 6.3.1 20170109 (GCC)
1. Issue.
Snippet:
template <typename T>
struct GetTypeNameHelper
{
static const char* GetTypeName(void)
{
static const size_t size = sizeof(__FUNCTION__) - sizeof("GetTypeName
");
static char typeName[size] = {};
return typeName;
}
};
static void test_case__freeze()
{
std::cout << GetTypeNameHelper<int>::GetTypeName() << "\n";
}
Running this: g++ -Wall -W -g -std=c++14 ../../src/main.cpp -o main
for above snippet leads to hanging cc1plus process which must be interrupted by
Ctrl+C.
Anyway compilation for this snippet works as expected:
static const char* GetTypeName()
{
static const size_t size = sizeof(__FUNCTION__) - sizeof("GetTypeName ");
static char typeName[size] = {};
return typeName;
}
static void test_case__ok()
{
std::cout << GetTypeName() << "\n";
}
g++ -Wall -W -g -std=c++14 ../../src/main.cpp -o main
../../src/main.cpp: In function ‘const char* ok_case::GetTypeName()’:
../../src/main.cpp:254:30: error: size of array ‘typeName’ is too large
static char typeName[size] = {};
^
../../src/main.cpp:255:12: error: ‘typeName’ was not declared in this scope
return typeName;
^~~~~~~~
2. Analysis
I tried godbolt and seems that issue is easily reproducible for all gcc since
gcc 4.9. Please take a look on link [1] on bottom of my email. It means bug was
probably introduced in gcc 4.9. If you try g++ 4.8.5 then output is expected:
<source>:9:21: error: size of variable 'typeName' is too large
static char typeName[size] = {};
^
Compiler exited with result code 1
But for g++ 4.9 and newer we get compilation timeouts:
Killed - processing time exceeded
Compiler exited with result code null
Anyway I managed to reproduce problem in my local environment with debbugable
gcc 7 invoked under gdb. After investigation I localized root cause inside c++
front end internals.
/mnt/gcc/build/bin/gcc -wrapper /usr/bin/gdb,--args -Wall -W -g -std=c++14
../../src/main.cpp -o main
GNU gdb (GDB) 7.12.1
Copyright (C) 2017 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from
/mnt/gcc/build/libexec/gcc/x86_64-pc-linux-gnu/7.0.1/cc1plus...done.
(gdb) r
Starting program: /mnt/gcc/build/libexec/gcc/x86_64-pc-linux-gnu/7.0.1/cc1plus
-quiet -D_GNU_SOURCE ../../src/main.cpp -quiet -dumpbase main.cpp
-mtune=generic -march=x86-64 -auxbase main -g -Wall -Wextra -std=c++14 -o
/tmp/ccrSwF5W.s
^C
Program received signal SIGINT, Interrupt.
zero_init_p (t=0x7ffff6a663f0) at .././../gcc/gcc/cp/tree.c:3834
3834 if (TYPE_PTRDATAMEM_P (t))
(gdb) bt
#0 zero_init_p (t=0x7ffff6a663f0) at .././../gcc/gcc/cp/tree.c:3834
#1 0x00000000006851e6 in process_init_constructor_array (complain=3,
init=<optimized out>, type=0x7ffff502b000) at .././../gcc/gcc/cp/typeck2.c:1328
#2 process_init_constructor (complain=3, init=<optimized out>,
type=0x7ffff502b000) at .././../gcc/gcc/cp/typeck2.c:1619
#3 digest_init_r (type=type@entry=0x7ffff502b000, init=<optimized out>,
init@entry=0x7ffff5017510, nested=nested@entry=false, flags=<optimized out>,
complain=complain@entry=3) at .././../gcc/gcc/cp/typeck2.c:1131
#4 0x0000000000687613 in digest_init_flags (complain=3, flags=<optimized out>,
init=0x7ffff5017510, type=0x7ffff502b000) at .././../gcc/gcc/cp/typeck2.c:1176
#5 store_init_value (decl=decl@entry=0x7ffff5006ab0,
init=init@entry=0x7ffff5017510, cleanups=cleanups@entry=0x7fffffffdcb0,
flags=flags@entry=2048) at .././../gcc/gcc/cp/typeck2.c:803
#6 0x00000000005e277b in check_initializer (decl=decl@entry=0x7ffff5006ab0,
init=0x7ffff5017510, flags=2048, flags@entry=0,
cleanups=cleanups@entry=0x7fffffffdcb0) at .././../gcc/gcc/cp/decl.c:6365
#7 0x000000000060d1ad in cp_finish_decl (decl=decl@entry=0x7ffff5006ab0,
init=<optimized out>, init_const_expr_p=<optimized out>,
asmspec_tree=<optimized out>, asmspec_tree@entry=0x0, flags=flags@entry=0)
at .././../gcc/gcc/cp/decl.c:7037
#8 0x000000000064578b in tsubst_expr (t=0x7ffff54cd020, args=<optimized out>,
complain=3, in_decl=<optimized out>, integral_constant_expression_p=<optimized
out>) at .././../gcc/gcc/cp/pt.c:15828
#9 0x00000000006426ee in tsubst_expr (t=<optimized out>, args=0x7ffff54cd300,
complain=3, in_decl=0x7ffff524fe80, integral_constant_expression_p=<optimized
out>) at .././../gcc/gcc/cp/pt.c:15717
#10 0x0000000000642d81 in tsubst_expr (t=0x7ffff58453c0, args=0x7ffff54cd300,
complain=3, in_decl=0x7ffff524fe80, integral_constant_expression_p=<optimized
out>) at .././../gcc/gcc/cp/pt.c:15943
#11 0x000000000063f528 in instantiate_decl (d=<optimized out>,
d@entry=0x7ffff5252a00, defer_ok=<optimized out>, defer_ok@entry=false,
expl_inst_class_mem_p=expl_inst_class_mem_p@entry=false) at
.././../gcc/gcc/cp/pt.c:22894
#12 0x000000000067f6fc in instantiate_pending_templates
(retries=retries@entry=0) at .././../gcc/gcc/cp/pt.c:23015
#13 0x00000000006c2a49 in c_parse_final_cleanups () at
.././../gcc/gcc/cp/decl2.c:4526
#14 0x0000000000d3450f in compile_file () at .././../gcc/gcc/toplev.c:467
#15 0x00000000005b8468 in do_compile () at .././../gcc/gcc/toplev.c:2000
#16 toplev::main (this=this@entry=0x7fffffffe23e, argc=<optimized out>,
argc@entry=17, argv=<optimized out>, argv@entry=0x7fffffffe338) at
.././../gcc/gcc/toplev.c:2134
#17 0x00000000005ba76b in main (argc=17, argv=0x7fffffffe338) at
.././../gcc/gcc/main.c:39
Every time I stop cc1plus and check backtrace it contains
process_init_constructor_array. It clearly corresponds to empty list
initialization for array typeName in source code I provided.
It turns out cc1plus enters infinite loop here (gcc/cp/typeck2.c:1312)
if (!unbounded)
for (; i < len; ++i)
{
...
The reason is simple. Right before entering loop variable len has maximal
unsigned long value (len = 18446744073709551615 = 0xFFFFFFFFFFFFFFFF).
(gdb) s
process_init_constructor_array (complain=3, init=0x7ffff5017510,
type=0x7ffff502b000) at .././../gcc/gcc/cp/typeck2.c:1278
1278 if (!unbounded && vec_safe_length (v) > len)
(gdb) info locals
i = <optimized out>
len = 18446744073709551615
flags = 0
ce = <optimized out>
unbounded = false
v = 0x0
Conclusion is that for some reason front end try to build constructor for every
array element. Unfortunately it doesn't detect that array is extremly large and
in consequence cc1plus enters infinite loop. Hope it helps for further
investigation in gcc team.
Regards,
Dawid
[1]
https://godbolt.org/#g:!((g:!((g:!((h:codeEditor,i:(j:1,options:(colouriseAsm:%270%27,compileOnChange:%270%27),source:%27%23include+%3Ciostream%3E%0A%0Atemplate+%3Ctypename+T%3E%0Astruct+GetTypeNameHelper%0A%7B%0A++++static+const+char*+GetTypeName(void)%0A++++%7B%0A++++++++static+const+size_t+size+%3D+sizeof(__FUNCTION__)+-+sizeof(%22GetTypeName+%22)%3B%0A++++++++static+char+typeName%5Bsize%5D+%3D+%7B%7D%3B%0A++++++++return+typeName%3B%0A++++%7D%0A%7D%3B%0A%0Astatic+void+test_case__freeze()%0A%7B%0A++++std::cout+%3C%3C+GetTypeNameHelper%3Cint%3E::GetTypeName()+%3C%3C+%22%5Cn%22%3B%0A%7D%0A%0Aint+main()%0A%7B%0A++test_case__freeze()%3B%0A++return+0%3B%0A%7D%0A++%27),l:%275%27,n:%271%27,o:%27C%2B%2B+source+%231%27,t:%270%27)),k:47.03755465382113,l:%274%27,n:%270%27,o:%27%27,s:0,t:%270%27),(g:!((h:compiler,i:(compiler:g63,filters:(b:%270%27,commentOnly:%270%27,directives:%270%27,intel:%270%27),options:%27%27),l:%275%27,n:%270%27,o:%27%231+with+x86-64+gcc+6.3%27,t:%270%27)),k:18.110716230348245,l:%274%27,n:%270%27,o:%27%27,s:0,t:%270%27),(g:!((h:output,i:(compiler:1,editor:1),l:%275%27,n:%270%27,o:%27%231+with+x86-64+gcc+6.3%27,t:%270%27)),k:34.85172911583061,l:%274%27,n:%270%27,o:%27%27,s:0,t:%270%27)),l:%272%27,n:%270%27,o:%27%27,t:%270%27)),version:4
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Subject: [Bug tree-optimization/80167] [6/7 Regression] ICE in translate_isl_ast_to_gimple::is_valid_rename at gcc/graphite-isl-ast-to-gimple.c:1139
Date: Fri, 24 Mar 2017 09:43:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
Date: Fri, 24 Mar 2017 10:05:00 -0000
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--- Comment #16 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 23 Mar 2017, thopre01 at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80155
>
> --- Comment #15 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
> (In reply to Thomas Preud'homme from comment #14)
> > (In reply to rguenther@suse.de from comment #13)
> > > On Thu, 23 Mar 2017, thopre01 at gcc dot gnu.org wrote:
> > >
> > > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80155
> > > >
> > > > --- Comment #12 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
> > > > (In reply to Richard Biener from comment #9)
> > > > > Ah, the patches do not fix the testcase because the testcase is _not_ the
> > > > > PRE-creates-IV case. It's indeed simply hoisting/PRE at work transforming
> > > > >
> > > > > # a_14 = PHI <a_10(, a_5(D)>
> > > > > if (!b)
> > > > > a_8 = a_14 + 1;
> > > > >
> > > > > # a_2 = PHI <a_14(10), a_8(4)>
> > > > > a_10 = a_2 + 1;
> > > > > ... = *(a_2 + 1);
> > > > >
> > > > > to
> > > > >
> > > > > # a_14 = PHI <prephimp_12, a_5(D)>
> > > > > _4 = a_14 + 1;
> > > > > if (b)
> > > > > _3 = _4 + 1;
> > > > >
> > > > > # a_2 = PHI <a_14, _4>
> > > > > # prephitmp_12 = PHI <_4, _3>
> > > > > ... = *(a_2 + 1);
> > > > >
> > > > > increasing register pressure mainly because nothing figures that a_2 + 1
> > > > > in the dereference can be replaced by prephitmp_12 ...
> > > > >
> > > > > So this is a missed SLSR opportunity or, in this simple form, a missed
> > > > > PRE/CSE opportunity. Fixing that with the following (otherwise untested)
> > > > > restores good code generation for the testcase:
> > > > >
> > > > > Index: gcc/tree-ssa-pre.c
> > > > > ===================================================================
> > > > > --- gcc/tree-ssa-pre.c (revision 246414)
> > > > > +++ gcc/tree-ssa-pre.c (working copy)
> > > > > @@ -4636,6 +4610,35 @@ eliminate_dom_walker::before_dom_childre
> > > > > }
> > > > > }
> > > > >
> > > > > + if (gimple_has_ops (stmt))
> > > > > + for (unsigned i = 0; i < gimple_num_ops (stmt); ++i)
> > > > > + {
> > > > > + tree op = gimple_op (stmt, i);
> > > > > + if (op)
> > > > > + op = get_base_address (op);
> > > > > + if (op
> > > > > + && TREE_CODE (op) == MEM_REF
> > > > > + && ! integer_zerop (TREE_OPERAND (op, 1)))
> > > > > + {
> > > > > + tree ops[2];
> > > > > + vn_nary_op_t nary;
> > > > > + ops[0] = TREE_OPERAND (op, 0);
> > > > > + ops[1] = TREE_OPERAND (op, 1);
> > > > > + tree res = vn_nary_op_lookup_pieces (2, POINTER_PLUS_EXPR,
> > > > > + TREE_TYPE (ops[0]),
> > > > > + ops, &nary);
> > > > > + if (res && TREE_CODE (res) == SSA_NAME)
> > > > > + res = eliminate_avail (res);
> > > > > + if (res)
> > > > > + {
> > > > > + TREE_OPERAND (op, 0) = res;
> > > > > + TREE_OPERAND (op, 1)
> > > > > + = build_int_cst (TREE_TYPE (TREE_OPERAND (op, 1)), 0);
> > > > > + gimple_set_modified (stmt, true);
> > >
> > > Add
> > >
> > > if (TREE_CODE (res) == SSA_NAME
> > > && !is_gimple_debug (stmt))
> > > gimple_set_plf (SSA_NAME_DEF_STMT (res),
> > > NECESSARY, true);
> > >
> > > here.
> > >
> > > > > + }
> > > > > + }
> > > > > + }
> > > > > +
> > > > > if (gimple_modified_p (stmt))
> > > > > {
> > > > > /* If a formerly non-invariant ADDR_EXPR is turned into an
> > > > >
> > > > > note that in general optimzing
> > > > >
> > > > > q = p + 1;
> > > > > = ...*(p + 1);
> > > > >
> > > > > "back" to *q will be undone by forwprop/stmt folding later but in this
> > > > > case the feeding stmt is a PHI node and not a pointer-plus. It still
> > > > > means that the change might be a bit too disruptive at this point
> > > > > (we could restricit it a bit by only handling the case where we don't
> > > > > replace with a pointer-plus result).
> > > >
> > > > Thanks for your work on this! Sadly GCC ICEs with this patch:
> > > >
> > > > 0xd36f53 update_dep_bb
> > > > gcc/tree-ssa-tail-merge.c:411
> > > > 0xd38f54 stmt_update_dep_bb
> > > > gcc/tree-ssa-tail-merge.c:429
> > > > 0xd38f54 same_succ_hash
> > > > gcc/tree-ssa-tail-merge.c:452
> > > > 0xd38f54 find_same_succ_bb
> > > > gcc/tree-ssa-tail-merge.c:717
> > > > 0xd39927 find_same_succ
> > > > gcc/tree-ssa-tail-merge.c:748
> > > > 0xd39927 init_worklist
> > > > gcc/tree-ssa-tail-merge.c:767
> > > > 0xd39927 tail_merge_optimize(unsigned int)
> > > > gcc/tree-ssa-tail-merge.c:1726
> > > > 0xce2d6a execute
> > > > gcc/tree-ssa-pre.c:5164
> > > >
> > > >
> >
> > There's progress. Performance is improved but not as much as disabling code
> > hoisting. I'll try to reduce the testcase again with that patch to see if I
> > can find a testcase that expose all issues.
>
> Funnily this led back to the Cortex-M0+ reduced testcase. With the patch in
> comment #13 applied we can still see a difference in the push (one register
> pushed Vs 0).
I can't reproduce zero pushes here I get three with/without
-fno-code-hoisting. code hoisting hoists the two loads inside
the switch before it so we have
pretmp_36 = MEM[(char *)b_15 + 1B];
switch (a.1_14) <default: <L2> [50.00%], case 0: <L1> [50.00%]>
<L1> [42.78%]:
if (pretmp_36 != 0)
goto <bb 6>; [92.51%]
else
goto <bb 9>; [7.49%]
...
<L2> [42.82%]:
if (pretmp_36 != 0)
goto <bb 13>; [92.49%]
else
goto <bb 11>; [7.51%]
...
that seems to be an opportunity for threading to f*ck things up.
Though to me the final assembly looks better than w/o code-hoisting.
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Subject: [Bug middle-end/80161] const argument hidden from AVX intrinsics due to OpenMP outlining
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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 #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Well, the last argument to these builtins has to be a constant, so e.g. at -O0
in C this will fail to compile as well, even without -fopenmp.
In C++ it of course compiles even at -O0 (with s/restrict/__restrict/g).
So, in C without -fopenmp you are relying on optimizations to propagate the
value into the intrinsics, and we don't (yet) have IPA propagation between
outlined OpenMP functions and their callers. In theory that should be doable,
but is too late for GCC 7.
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Subject: [Bug tree-optimization/80153] ivopt generate wrong code
Date: Fri, 24 Mar 2017 10:07:00 -0000
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 23 Mar 2017, amker at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80153
>
> --- Comment #5 from amker at gcc dot gnu.org ---
> Seems there is an issue that tree-affine lacks ability differentiating between
> (unsgined)(pointer + offset) and (unsigned)pointer + (unsigned)offset.
Yes, same for (unsigned)int + (unsigned)int and thus integer overflow.
> The current behavior of tree_to_aff_combination always folds type conversion
> into operands, generating exact the same affines for above two expressions:
>
> {
> type = unsigned int
> offset = 6
> elements = {
> [0] = "oops!\n" * 1,
> [1] = ivtmp.37_10 * 0xffffffffffffffffffffffffffffffffffffffffffffffff
> }
> }
>
> While converting affine back to tree, it takes the other way around, always
> generating the latter expression: (unsgined)(pointer + offset). This causes
> problem.
>
> IIUC, there are two possible fixes here. First one is as you mentioned, we
> work conservatively and don't fold type conversion into operands (by not
> stripping nop). I suspect this could causes serious code generation
> regression.
Yeah.
> The second one is the opposite, we always fold type conversion into operands,
> by keeping strip_nops. While converting affine back to tree, we generate
> folded expression instead of trying to preserve pointer_plus expression as now.
> I prefer the second one, and understand there is concern since tree affine is
> used in code generation we could lose pointer arithmetic semantic information
> like the pointer_plus expression never overflows/wraps.
I think it does that for integer arithmetic already (use unsigned for
all computation) but I may be mistaken...
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Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
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--- Comment #17 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #16)
> On Thu, 23 Mar 2017, thopre01 at gcc dot gnu.org wrote:
> >
> > Funnily this led back to the Cortex-M0+ reduced testcase. With the patch in
> > comment #13 applied we can still see a difference in the push (one register
> > pushed Vs 0).
>
> I can't reproduce zero pushes here I get three with/without
> -fno-code-hoisting. code hoisting hoists the two loads inside
> the switch before it so we have
Ooops my apologize, it needs more flags indeed. -O2 -funroll-all-loops shows 2
registers pushed Vs 1 when -fno-code-hoisting is added.
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Subject: [Bug target/80162] [5/6/7 Regression] ICE on invalid code (address of register variable)
Date: Fri, 24 Mar 2017 10:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80162
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #41039|0 |1
is obsolete| |
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41040
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41040&action=edit
gcc7-pr80162.patch
Updated untested patch.
>From gcc-bugs-return-558813-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 10:43:12 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80170] New: SLP vectorization creates aligned access
Date: Fri, 24 Mar 2017 10:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80170
Bug ID: 80170
Summary: SLP vectorization creates aligned access
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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While playing with some unrelated area I noticed a latent bug in the vectorizer
mishandling alignment for which I only have a gimple testcase sofar, reduced
from g++.dg/torture/pr78189.C:
struct A
{
void * a;
void * b;
};
struct __attribute__((aligned(16))) B
{
void * pad;
void * misaligned;
void * pad2;
struct A a;
};
__attribute__((noclone, noinline))
void __GIMPLE (startwith("slp"))
NullB (void * misalignedPtr)
{
struct B * b;
bb_2:
b_2 = misalignedPtr_1(D) + 18446744073709551608ul;
__MEM <struct B> (b_2).a.a = _Literal (void *) 0;
__MEM <struct B> (b_2).a.b = _Literal (void *) 0;
return;
}
int main()
{
struct B b;
NullB (&b.misaligned);
return 0;
}
> gcc-7 t.c -fgimple -O2 -ftree-slp-vectorize
> ./a.out
Segmentation fault (core dumped)
>From gcc-bugs-return-558814-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 10:43:26 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80170] SLP vectorization creates aligned access
Date: Fri, 24 Mar 2017 10:43:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-03-24
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-558815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 10:50:12 2017
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From: "D.Bahadir at GMX dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80171] New: ICE (Segmentation fault) with optimization
Date: Fri, 24 Mar 2017 10:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80171
Bug ID: 80171
Summary: ICE (Segmentation fault) with optimization
Product: gcc
Version: 6.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 41041
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41041&action=edit
Testcase that yields segmentation fault when optimizing.
Compiling the attached (and reduced) test-case with any optimization yields a
segmentation fault.
Note however, that the original (non-reduced) test-case only segfault-ed with
"-O3" enabled.
The error:
----------
$ LANG=C /usr/bin/g++-6 -fpermissive -m64 -D_GLIBCXX_USE_CXX11_ABI=1
-std=c++14 -O3 -DNDEBUG -fPIC -c -w testcase.i -o /dev/null
testcase.i: In function 'void padis::isislistener::test()':
testcase.i:858:6: internal compiler error: Segmentation fault
void test() {
^~~~
0xad48ef crash_signal
../../src/gcc/toplev.c:333
0xde8f98 generic_simplify_VIEW_CONVERT_EXPR
/build/gcc-6-_9B9T1/gcc-6-6.2.0/build/gcc/generic-match.c:7580
0xde8f98 generic_simplify(unsigned int, tree_code, tree_node*, tree_node*)
/build/gcc-6-_9B9T1/gcc-6-6.2.0/build/gcc/generic-match.c:9055
0x89a9cb fold_unary_loc(unsigned int, tree_code, tree_node*, tree_node*)
../../src/gcc/fold-const.c:7704
0x8cd81c fold_ctor_reference(tree_node*, tree_node*, unsigned long, unsigned
long, tree_node*)
../../src/gcc/gimple-fold.c:5508
0x8cdafa fold_array_ctor_reference
../../src/gcc/gimple-fold.c:5415
0x8cdafa fold_ctor_reference(tree_node*, tree_node*, unsigned long, unsigned
long, tree_node*)
../../src/gcc/gimple-fold.c:5533
0x8cde81 fold_const_aggregate_ref_1(tree_node*, tree_node* (*)(tree_node*))
../../src/gcc/gimple-fold.c:5641
0x8ce94d gimple_fold_stmt_to_constant_1(gimple*, tree_node* (*)(tree_node*),
tree_node* (*)(tree_node*))
../../src/gcc/gimple-fold.c:5119
0xc16396 try_to_simplify
../../src/gcc/tree-ssa-sccvn.c:3634
0xc16396 visit_use
../../src/gcc/tree-ssa-sccvn.c:3687
0xc184b5 process_scc
../../src/gcc/tree-ssa-sccvn.c:3975
0xc184b5 extract_and_process_scc_for_name
../../src/gcc/tree-ssa-sccvn.c:4062
0xc184b5 DFS
../../src/gcc/tree-ssa-sccvn.c:4114
0xc18d17 sccvn_dom_walker::before_dom_children(basic_block_def*)
../../src/gcc/tree-ssa-sccvn.c:4596
0x1059e02 dom_walker::walk(basic_block_def*)
../../src/gcc/domwalk.c:265
0xc19b02 run_scc_vn(vn_lookup_kind)
../../src/gcc/tree-ssa-sccvn.c:4707
0xbf2d24 execute
../../src/gcc/tree-ssa-pre.c:4910
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-6/README.Bugs> for instructions.
The test-system:
----------------
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial
$ uname -a
Linux My-Notebook 4.4.0-66-generic #87-Ubuntu SMP Fri Mar 3 15:29:05 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux
The compiler-version:
---------------------
$ /usr/bin/g++-6 --version
g++-6 (Ubuntu 6.2.0-3ubuntu11~16.04) 6.2.0 20160901
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>From gcc-bugs-return-558816-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 10:57:34 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80171] ICE (Segmentation fault) with optimization
Date: Fri, 24 Mar 2017 10:57:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |trippels at gcc dot gnu.org
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Could you please also attach the compressed non-reduced testcase?
>From gcc-bugs-return-558817-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 11:04:13 2017
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From: "rpirrera at aitek dot it" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80122] __builtin_va_arg_pack() and __builtin_va_arg_pack_len() does not work correctly
Date: Fri, 24 Mar 2017 11:04:00 -0000
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--- Comment #8 from rpirrera at aitek dot it ---
OK we have applied the patch onto the 5.4.0 version of GCC and it is working
correctly.
Thank you for your support!
>From gcc-bugs-return-558818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 11:15:46 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80171] [5/6/7 Regression] ICE (Segmentation fault) with optimization
Date: Fri, 24 Mar 2017 11:15:00 -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| |2017-03-24
Component|c++ |tree-optimization
Known to work| |4.8.5
Target Milestone|--- |5.5
Summary|ICE (Segmentation fault) |[5/6/7 Regression] ICE
|with optimization |(Segmentation fault) with
| |optimization
Ever confirmed|0 |1
Known to fail| |4.9.4, 5.4.1, 6.3.1, 7.0.1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with the reduced testcase, ICEs since GCC 4.9.
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Subject: [Bug sanitizer/80168] [5/6/7 Regression] ICE in make_decl_rtl, at varasm.c:1311 w/ VLA and -fsanitizedress
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'm not sure this is valid given 'a' is global.
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Subject: [Bug tree-optimization/80171] [5/6/7 Regression] ICE (Segmentation fault) with optimization
Date: Fri, 24 Mar 2017 11:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
On trunk:
#1 0x000000000173ef58 in generic_simplify_VIEW_CONVERT_EXPR (loc=0,
code=VIEW_CONVERT_EXPR, type=<integer_type 0x7ffff6a00f18 size_t>,
op0=<tree 0x0>) at generic-match.c:9836
9836 if ((0 && useless_type_conversion_p (type, TREE_TYPE
(captures[0]))) || (1 && type == TREE_TYPE (captures[0])))
(gdb) p captures[0]
$1 = (tree_node *) 0x0
#4 0x0000000000e05840 in fold_ctor_reference (
type=<integer_type 0x7ffff6a00f18 size_t>,
ctor=<addr_expr 0x7ffff677ac20>, offset=0, size=64,
from_decl=<var_decl 0x7ffff678a000
_ZTVN5padis12isislistener3tlv2te25IPv4NeighborAddressSubTlvE>)
at /space/rguenther/src/svn/gcc-7-branch/gcc/gimple-fold.c:6242
6242 ret = fold_unary (VIEW_CONVERT_EXPR, type, ret);
(gdb) p ret
$2 = <tree 0x0>
Simple fix (further reduced testcase appreciated)
Index: gcc/gimple-fold.c
===================================================================
--- gcc/gimple-fold.c (revision 246437)
+++ gcc/gimple-fold.c (working copy)
@@ -6239,9 +6239,12 @@ fold_ctor_reference (tree type, tree cto
&& !compare_tree_int (TYPE_SIZE (TREE_TYPE (ctor)), size))
{
ret = canonicalize_constructor_val (unshare_expr (ctor), from_decl);
- ret = fold_unary (VIEW_CONVERT_EXPR, type, ret);
if (ret)
- STRIP_USELESS_TYPE_CONVERSION (ret);
+ {
+ ret = fold_unary (VIEW_CONVERT_EXPR, type, ret);
+ if (ret)
+ STRIP_USELESS_TYPE_CONVERSION (ret);
+ }
return ret;
}
/* For constants and byte-aligned/sized reads try to go through
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Subject: [Bug middle-end/80163] ICE on hopefully valid code
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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 41042
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41042&action=edit
gcc7-pr80163.patch
There are multiple issues, I'm just attaching an untested fix for a related bug
where if the inner type of the conversion is unsigned, we still use
SIGN_EXTEND.
Are you sure clang accepts it? The versions I've tried reject it.
And ICC just silently miscompiles it. Make that e.g.
void bar (void);
__int128_t *
foo (void)
{
a:
bar ();
b:;
static __int128_t d = (long) &&a - (long) &&b;
return &d;
}
so that it doesn't optimize away and you'll see it emits
d.3:
.quad .L_2TAG_PACKET_0 - .L_2TAG_PACKET_1
.space 8, 0x00 # pad
which isn't sign-extended, but zero-extended. There are no relocations that
can achieve that though, so I think we need to reject this testcase.
>From gcc-bugs-return-558822-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 11:32:14 2017
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Subject: [Bug middle-end/80163] ICE on hopefully valid code
Date: Fri, 24 Mar 2017 11:32:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Clang rejects the test-case written in C:
clang pr80163.c -c
pr80163.c:9:25: error: initializer element is not a compile-time constant
static __int128_t d = (long) &&a - (long) &&b;
^~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
However accepts in C++:
clang++ pr80163.cpp -c
[no output]
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Subject: [Bug sanitizer/80166] SANITIZER_INTERCEPT_GETGROUPS modifies list when size is 0 Out-of-bounds write
Date: Fri, 24 Mar 2017 11:43:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, problem is in libsanitizer. I'll report that to libsanitizer and
suggest patch for that.
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Subject: [Bug tree-optimization/80171] [5/6/7 Regression] ICE (Segmentation fault) with optimization
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--- Comment #4 from Deniz Bahadir <D.Bahadir at GMX dot de> ---
Created attachment 41043
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41043&action=edit
Non-reduced test-case which fails with -O2 and -O3.
This was the original test-case which did not fail with "-O1" but with "-O2"
and "-O3".(The original production-code, however, only failed with "-O3". I am
not sure, if I am able to provide it.)
The error:
----------
LANG=C /usr/bin/g++-6 -fpermissive -m64 -D_GLIBCXX_USE_CXX11_ABI=1 -std=c++14
-O3 -DNDEBUG -fPIC -c -w testcase.orig.i -o /dev/null
testcase.orig.i: In function 'void padis::isislistener::test()':
testcase.orig.i:67462:6: internal compiler error: Segmentation fault
void test()
^~~~
0xad48ef crash_signal
../../src/gcc/toplev.c:333
0xde8f98 generic_simplify_VIEW_CONVERT_EXPR
/build/gcc-6-_9B9T1/gcc-6-6.2.0/build/gcc/generic-match.c:7580
0xde8f98 generic_simplify(unsigned int, tree_code, tree_node*, tree_node*)
/build/gcc-6-_9B9T1/gcc-6-6.2.0/build/gcc/generic-match.c:9055
0x89a9cb fold_unary_loc(unsigned int, tree_code, tree_node*, tree_node*)
../../src/gcc/fold-const.c:7704
0x8cd81c fold_ctor_reference(tree_node*, tree_node*, unsigned long, unsigned
long, tree_node*)
../../src/gcc/gimple-fold.c:5508
0x8cdafa fold_array_ctor_reference
../../src/gcc/gimple-fold.c:5415
0x8cdafa fold_ctor_reference(tree_node*, tree_node*, unsigned long, unsigned
long, tree_node*)
../../src/gcc/gimple-fold.c:5533
0xc1056f fully_constant_vn_reference_p(vn_reference_s*)
../../src/gcc/tree-ssa-sccvn.c:1372
0xc1357b vn_reference_lookup(tree_node*, tree_node*, vn_lookup_kind,
vn_reference_s**, bool)
../../src/gcc/tree-ssa-sccvn.c:2261
0xc164a9 visit_reference_op_load
../../src/gcc/tree-ssa-sccvn.c:3362
0xc164a9 visit_use
../../src/gcc/tree-ssa-sccvn.c:3755
0xc184b5 process_scc
../../src/gcc/tree-ssa-sccvn.c:3975
0xc184b5 extract_and_process_scc_for_name
../../src/gcc/tree-ssa-sccvn.c:4062
0xc184b5 DFS
../../src/gcc/tree-ssa-sccvn.c:4114
0xc18d17 sccvn_dom_walker::before_dom_children(basic_block_def*)
../../src/gcc/tree-ssa-sccvn.c:4596
0x1059e02 dom_walker::walk(basic_block_def*)
../../src/gcc/domwalk.c:265
0xc19b02 run_scc_vn(vn_lookup_kind)
../../src/gcc/tree-ssa-sccvn.c:4707
0xbf2d24 execute
../../src/gcc/tree-ssa-pre.c:4910
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-6/README.Bugs> for instructions.
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Subject: [Bug tree-optimization/80171] [5/6/7 Regression] ICE (Segmentation fault) with optimization
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--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Deniz Bahadir from comment #4)
> Created attachment 41043 [details]
> Non-reduced test-case which fails with -O2 and -O3.
Thanks. This is good enough. I will try to reduce it further, but
this is a Boost testcase, so chances for a nice small testcase are low.
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Subject: [Bug middle-end/80163] ICE on hopefully valid code
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #2)
> Clang rejects the test-case written in C:
>
> clang pr80163.c -c
> pr80163.c:9:25: error: initializer element is not a compile-time constant
> static __int128_t d = (long) &&a - (long) &&b;
> ^~~~~~~~~~~~~~~~~~~~~~~
> 1 error generated.
>
> However accepts in C++:
>
> clang++ pr80163.cpp -c
> [no output]
We aren't talking about C++, that can construct those dynamically at runtime if
they aren't constructible at compile time.
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Subject: [Bug tree-optimization/80171] [5/6/7 Regression] ICE (Segmentation fault) with optimization
Date: Fri, 24 Mar 2017 11:56:00 -0000
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--- Comment #6 from Deniz Bahadir <D.Bahadir at GMX dot de> ---
(In reply to Richard Biener from comment #3)
>
> Simple fix (further reduced testcase appreciated)
CReduce originally created a radically reduced test-case which however was no
valid C++ anymore. (My check script was not specific enough.) It always failed
and should probably become another bug-report.
Radically reduced invalid C++ test-case:
----------------------------------------
namespace mpl_
}
namespace boost namespace mpl using namespace mpl_
}
}
namespace mpl_ template <T> struct integral_c;
}
namespace boost template <val> struct mpl::integral_c {
However, I was able to adjust it slightly. (I am not sure if this is really
valid C++14 code.)
Radically reduced (valid?) C++ test-case:
-----------------------------------------
namespace mpl_ {}
namespace boost { namespace mpl { using namespace mpl_; } }
namespace mpl_ { template <typename T> struct integral_c; }
namespace boost { template <typename val> struct mpl::integral_c {}; }
Both fail like this:
The error:
----------
LANG=C /usr/bin/g++-6 -fpermissive -m64 -D_GLIBCXX_USE_CXX11_ABI=1 -std=c++14
-O0 -DNDEBUG -fPIC -c -w smalltestcase.i -o /dev/null
g++-6: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-6/README.Bugs> for instructions.
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Subject: [Bug tree-optimization/80167] [6 Regression] ICE in translate_isl_ast_to_gimple::is_valid_rename at gcc/graphite-isl-ast-to-gimple.c:1139
Date: Fri, 24 Mar 2017 12:17:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Known to work| |7.0.1
Summary|[6/7 Regression] ICE in |[6 Regression] ICE in
|translate_isl_ast_to_gimple |translate_isl_ast_to_gimple
|::is_valid_rename at |::is_valid_rename at
|gcc/graphite-isl-ast-to-gim |gcc/graphite-isl-ast-to-gim
|ple.c:1139 |ple.c:1139
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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Subject: [Bug tree-optimization/80167] [6 Regression] ICE in translate_isl_ast_to_gimple::is_valid_rename at gcc/graphite-isl-ast-to-gimple.c:1139
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Mar 24 12:16:43 2017
New Revision: 246438
URL: https://gcc.gnu.org/viewcvs?rev=246438&root=gcc&view=rev
Log:
2017-03-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/80167
* graphite-isl-ast-to-gimple.c
(translate_isl_ast_to_gimple::is_valid_rename): Handle default-defs
properly.
(translate_isl_ast_to_gimple::get_rename): Likewise.
* gcc.dg/graphite/pr80167.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/graphite/pr80167.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/graphite-isl-ast-to-gimple.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-558830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 12:18:49 2017
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Subject: [Bug sanitizer/80166] SANITIZER_INTERCEPT_GETGROUPS modifies list when size is 0 Out-of-bounds write
Date: Fri, 24 Mar 2017 12:18:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Another problem is that for a negative number, returned value is -1 (error).
And thus libsanitizer crashes:
==7910==ERROR: AddressSanitizer: negative-size-param: (size=-4)
#0 0x7ff25bcd6a00 in __interceptor_getgroups
(/usr/lib64/libasan.so.3+0x50a00)
#1 0x4009fb in main /home/marxin/Programming/testcases/pr80166.c:9
#2 0x7ff25b901540 in __libc_start_main (/lib64/libc.so.6+0x20540)
#3 0x400899 in _start
(/home/marxin/Programming/testcases/get_group+0x400899)
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
Date: Fri, 24 Mar 2017 12:34:00 -0000
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--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Mar 24 12:34:19 2017
New Revision: 246439
URL: https://gcc.gnu.org/viewcvs?rev=246439&root=gcc&view=rev
Log:
2017-03-24 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/80158
* gimple-ssa-strength-reduction.c (replace_mult_candidate): When
replacing a candidate statement, also replace it for the
candidate's alternate interpretation.
(replace_rhs_if_not_dup): Likewise.
(replace_one_candidate): Likewise.
* gfortran.fortran-torture/compile/pr80158.f: New file.
Added:
trunk/gcc/testsuite/gfortran.fortran-torture/compile/pr80158.f
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-strength-reduction.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-558831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 12:34:46 2017
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Subject: [Bug tree-optimization/80158] [7 Regression] ICE in all_phi_incrs_profitable
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #18 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug libstdc++/80172] New: Segfault when using a constructed intializer list of tuple(int, variant) created through template pack expansion
Date: Fri, 24 Mar 2017 12:49:00 -0000
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Bug ID: 80172
Summary: Segfault when using a constructed intializer list of
tuple(int, variant) created through template pack
expansion
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Target Milestone: ---
Created attachment 41044
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41044&action=edit
example source code that triggers segfault
Hi gcc-team,
the attached source code compiles, but will terminate with a segfault when
executed.
> g++-7 -std=gnu++1z -Wall -Wextra bug_gcc_tuple_of_variant_in_pack_expansion.cpp
> ./a.out
0. 4
1. 5
2. 1
A
N
-
0. A
1. N
2. -
zsh: segmentation fault (core dumped) ./a.out
best regards
marehr
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Subject: [Bug middle-end/80163] ICE on hopefully valid code
Date: Fri, 24 Mar 2017 13:07:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41045
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41045&action=edit
gcc7-pr80163-2.patch
Untested patch to reject the sign-extension to int128.
>From gcc-bugs-return-558835-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 13:07:52 2017
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From: "arnd at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80160] [7 regression] operand has impossible constraints
Date: Fri, 24 Mar 2017 13:07:00 -0000
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--- Comment #6 from Arnd Bergmann <arnd at linaro dot org> ---
I've run into a four other files in the kernel sources that show this bug. I've
confirmed that the patch in comment 4 addresses all of them.
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Fri, 24 Mar 2017 13:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
--- Comment #36 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #34)
> C++14 12.8/16 says
>
> "The implicitly-defined copy/move constructor for a union X copies the
> object representation (3.9) of X."
>
> 3.9/4 says
>
> "The object representation of an object of type T is the sequence of N
> unsigned char objects... For trivially copyable types, the value
> representation is a set of bits in the object representation that determines
> a value,..."
>
> this suggests that the copying should work but the C++ FE may not simply
> elide the copy construction by emitting
>
> c = *p;
>
> because that does _not_ implement memcpy semantics for the union member.
Nothing in the standard makes memcpy magic; 3.9/3 says,
For any trivially copyable type T, if two pointers to T point to distinct T
objects obj1 and obj2, where neither obj1 nor obj2 is a base-class subobject,
if the underlying bytes (4.4) making up obj1 are copied into obj2, obj2 shall
subsequently hold the same value as obj1.
It just talks about copying the underlying bytes, not necessarily using memcpy
to do so. And a copy of a B is a memberwise copy, which implies copying the U
member, which as you quote means copying the object representation, which is
the underlying bytes.
>From gcc-bugs-return-558837-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 13:22:45 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/79776] [7 Regression] ICE on valid code in insert_vi_for_tree, at tree-ssa-structalias.c:2807
Date: Fri, 24 Mar 2017 13:22:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jamborm at gcc dot gnu.org
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
First list of nodes with same decl bypassing
/* Nodes without a body are not interesting. Especially do not
visit clones at this point for now - we get duplicate decls
there for inline clones at least. */
if (!node->has_gimple_body_p () || node->global.inlined_to)
continue;
if (node->ultimate_alias_target () != node)
continue;
_ZThn8_N1C2fnEPKciPi/3 (virtual E C::_ZThn8_N1C2fnEPKciPi(const char*, int,
int*)) @0x7ffff6a375c0
Type: function definition analyzed
Visibility: externally_visible public virtual artificial
previous sharing asm name: 21
Address is taken.
Availability: available
First run: 0
Function flags: body
Called by:
Calls: _ZN1C2fnEPKciPi/23 (inlined) (1.00 per call) (can throw external)
_ZN1C2fnEPKciPi/1 (virtual E C::fn(const char*, int, int*)) @0x7ffff6a372e0
Type: function definition analyzed
Visibility: externally_visible public virtual
previous sharing asm name: 32
Address is taken.
Availability: available
First run: 0
Function flags: body indirect_call_target
Called by:
where the latter is 'node' (the ultimate alias target). The former is
only reached through another alias chain, originating from
_ZN1C2fnEPKciPi/1 (virtual E C::fn(const char*, int, int*)) @0x7ffff6a372e0
Type: function definition analyzed
Visibility: externally_visible public virtual
previous sharing asm name: 32
Address is taken.
Referring: *.LTHUNK0/2 (alias)_ZTV1C/4 (addr)_ZThn8_N1C2fnEPKciPi/3 (addr)
Availability: available
First run: 0
Function flags: body indirect_call_target
Called by:
so it somehow walks itself with call_for_symbol_thunks_and_aliases but also
the decl it uses is used for an unrelated thunks-and-aliases chain.
I'm lost (cgraph bug?!)
>From gcc-bugs-return-558838-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 13:26:04 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Fri, 24 Mar 2017 13:26:00 -0000
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--- Comment #37 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 24 Mar 2017, jason at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
>
> --- Comment #36 from Jason Merrill <jason at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #34)
> > C++14 12.8/16 says
> >
> > "The implicitly-defined copy/move constructor for a union X copies the
> > object representation (3.9) of X."
> >
> > 3.9/4 says
> >
> > "The object representation of an object of type T is the sequence of N
> > unsigned char objects... For trivially copyable types, the value
> > representation is a set of bits in the object representation that determines
> > a value,..."
> >
> > this suggests that the copying should work but the C++ FE may not simply
> > elide the copy construction by emitting
> >
> > c = *p;
> >
> > because that does _not_ implement memcpy semantics for the union member.
>
> Nothing in the standard makes memcpy magic; 3.9/3 says,
>
> For any trivially copyable type T, if two pointers to T point to distinct T
> objects obj1 and obj2, where neither obj1 nor obj2 is a base-class subobject,
> if the underlying bytes (4.4) making up obj1 are copied into obj2, obj2 shall
> subsequently hold the same value as obj1.
>
> It just talks about copying the underlying bytes, not necessarily using memcpy
> to do so. And a copy of a B is a memberwise copy, which implies copying the U
> member, which as you quote means copying the object representation, which is
> the underlying bytes.
Yes. But then the act of copying, the
c = *p;
stmt needs to still follow 3.10/10, *p is not a valid glvalue to access
the object live in p->u.b which is of type A.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/80112] [5/6/7 Regression] ICE in doloop_condition_get at loop-doloop.c:158
Date: Fri, 24 Mar 2017 13:37:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Mar 24 13:37:01 2017
New Revision: 246441
URL: https://gcc.gnu.org/viewcvs?rev=246441&root=gcc&view=rev
Log:
PR rtl-optimization/80112
* loop-doloop.c (doloop_condition_get): Don't check condition
if cmp isn't SET with IF_THEN_ELSE src.
* gcc.dg/pr80112.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr80112.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/loop-doloop.c
trunk/gcc/testsuite/ChangeLog
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Fri, 24 Mar 2017 13:49:00 -0000
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--- Comment #38 from Richard Biener <rguenth at gcc dot gnu.org> ---
Simplified testcase for discussion (is not "miscompiled"):
struct S {
union { int i; } u;
};
int main()
{
S s;
new (&s.u.i) float (2.0);
S q = s;
if (*reinterpret_cast<float *>(&q.u.i) != 2.0)
abort ();
}
so you say q = s is valid because the object representation of the union
is copied. I say after storing 2.0 to s.u.i the access 's' in q = s is
invalid as you are accessing the stored value (a float) via a glvalue of
inappropriate type.
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From: "krebbel at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79893] ICE in s390_adjust_builtin_arglist in gcc/config/s390/s390-c.c:679
Date: Fri, 24 Mar 2017 13:52:00 -0000
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--- Comment #4 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Fri Mar 24 13:51:32 2017
New Revision: 246442
URL: https://gcc.gnu.org/viewcvs?rev=246442&root=gcc&view=rev
Log:
S/390: PR79893: Add diagnostics vec_load_bndry builtin.
The boundary argument of the vec_load_bndry builtin needs to be
rewritten. At that point it must be constant already. The current
diagnostics in s390_expand_builtins is too late for this. The patch
adds an additional check for that builtin which will be triggered
already during preprocessing.
Regression tested on s390x.
gcc/testsuite/ChangeLog:
2017-03-24 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/79893
* gcc.target/s390/zvector/pr79893.c: New test.
gcc/ChangeLog:
2017-03-24 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/79893
* config/s390/s390-c.c (s390_adjust_builtin_arglist): Issue an
error if the boundary argument is not constant.
Added:
trunk/gcc/testsuite/gcc.target/s390/zvector/pr79893.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/s390/s390-c.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/79904] ICE in annotate_constant_pool_refs, at config/s390/s390.c:7909
Date: Fri, 24 Mar 2017 13:53:00 -0000
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--- Comment #7 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Fri Mar 24 13:52:30 2017
New Revision: 246443
URL: https://gcc.gnu.org/viewcvs?rev=246443&root=gcc&view=rev
Log:
S/390: PR79904: Disallow reg + sym_ref literal pool addresses.
We accept reg + sym_ref as valid address if sym_ref is a literal pool
reference knowing that it will be rewritten as r13 + reg + offset.
However, annotate_constant_pool_refs was never able to handle that.
With the patch only single sym_refs are accepted.
Regression tested on s390x.
2017-03-24 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
PR target/79904
* config/s390/s390.c (s390_decompose_address): Reject reg +
sym_ref literal pool references.
gcc/testsuite/ChangeLog:
2017-03-24 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* gcc.dg/ubsan/pr79904-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/ubsan/pr79904-2.c
Modified:
trunk/gcc/config/s390/s390.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/80023] missing diagnostic on aligned_alloc with invalid alignment
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Eric Gallager <egall at gwmail dot gwu.edu> changed:
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----------------------------------------------------------------------------
CC| |egall at gwmail dot gwu.edu
--- Comment #1 from Eric Gallager <egall at gwmail dot gwu.edu> ---
I would like to see this diagnostic please; "confirmed"
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Subject: [Bug rtl-optimization/80173] New: ICE in store_bit_field_1, at expmed.c:787
Date: Fri, 24 Mar 2017 14:03:00 -0000
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Bug ID: 80173
Summary: ICE in store_bit_field_1, at expmed.c:787
Product: gcc
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> cat ../struct_asm.c
/* { dg-do compile } */
typedef int v8 __attribute__ ((vector_size(8)));
struct U {
v8 a;
v8 b;
};
int
foo (int i)
{
register struct U u asm ("xmm0") = {{-1, 0}, {-1, 0}};
return u.b[i];
}
> gcc ../struct_asm.c
../struct_asm.c: In function ‘foo’:
../struct_asm.c:13:21: internal compiler error: in store_bit_field_1, at
expmed.c:787
register struct U u asm ("xmm0") = {{-1, 0}, {-1, 0}};
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Subject: [Bug c/79918] Feature request: Warning about (may potential) misaligned address-reference
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Eric Gallager <egall at gwmail dot gwu.edu> changed:
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----------------------------------------------------------------------------
CC| |egall at gwmail dot gwu.edu
--- Comment #2 from Eric Gallager <egall at gwmail dot gwu.edu> ---
Is this the same as the issue in bug 41809?
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Subject: [Bug c++/80119] [6/7 Regression] -Wmaybe-uninitialized wrongly flags the body of a short-circuited if-clause
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri Mar 24 14:22:01 2017
New Revision: 246461
URL: https://gcc.gnu.org/viewcvs?rev=246461&root=gcc&view=rev
Log:
PR c++/80119
* cp-gimplify.c (cp_fold): Strip CLEANUP_POINT_EXPR if the expression
doesn't have side effects.
* g++.dg/warn/Wuninitialized-9.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/warn/Wuninitialized-9.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/80119] [6/7 Regression] -Wmaybe-uninitialized wrongly flags the body of a short-circuited if-clause
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #39 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
one thing I do not understand is this:
if I do this in Jakub's test case:
new (b.u.b) A (x);
//c = *p;
__builtin_memcpy(&c, p, sizeof(B));
bar (*p, c);
the mis-compilation goes away,
if I add this to Jakub's test case:
struct B
{
int x;
union U
{
int a;
char b[sizeof (float)];
} u;
int y;
B() {}
B(int xx, U uu, int yy):x(xx), u(uu), y(yy) {}
B(B &o)
{
__asm("":::"memory");
__builtin_memcpy(this, &o, sizeof(B));
__asm("":::"memory");
}
};
The mis-compilation gets not fixed.
Why?
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Subject: [Bug tree-optimization/80171] [5/6/7 Regression] ICE (Segmentation fault) with optimization
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--- Comment #7 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 41046
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41046&action=edit
Somewhat reduced testcase
I've attached a testcase that is accepted by clang. GCC ICEs without
-fpermissive.
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From: "bernd.edlinger at hotmail dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Fri, 24 Mar 2017 14:36:00 -0000
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--- Comment #40 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Yikes, I need an assignement operator:
B(const B &o)
{
__builtin_memcpy(this, &o, sizeof(B));
}
B& operator = (const B &o)
{
__builtin_memcpy(this, &o, sizeof(B));
return *this;
}
now it seems to work...
>From gcc-bugs-return-558851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 14:40:51 2017
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Subject: [Bug c++/77339] [5/6/7 Regression] ICE on invalid C++ code on x86_64-linux-gnu: in cp_parser_type_name, at cp/parser.c:16532
Date: Fri, 24 Mar 2017 14:40:00 -0000
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Mar 24 14:40:13 2017
New Revision: 246462
URL: https://gcc.gnu.org/viewcvs?rev=246462&root=gcc&view=rev
Log:
PR c++/77339 - ICE with invalid use of alias template.
* pt.c (lookup_template_class_1): Don't try to enter the scope of an
alias template.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/alias-decl-58.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
>From gcc-bugs-return-558852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 14:50:01 2017
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/78881] [F03] reading from string with DTIO procedure does not work properly
Date: Fri, 24 Mar 2017 14:50:00 -0000
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--- Comment #12 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Another issue:
In the case with file I/O if the child procedure consumes the EOR character,
upon return, the parent is also wanting to complete the EOR the check for EOR
and hits EOF.
Lets see what I get from c.l.f
>From gcc-bugs-return-558853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 14:54:14 2017
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Subject: [Bug rtl-optimization/80112] [5/6 Regression] ICE in doloop_condition_get at loop-doloop.c:158
Date: Fri, 24 Mar 2017 14:54:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[5/6/7 Regression] ICE in |[5/6 Regression] ICE in
|doloop_condition_get at |doloop_condition_get at
|loop-doloop.c:158 |loop-doloop.c:158
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-558854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 14:55:53 2017
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Subject: [Bug sanitizer/80166] SANITIZER_INTERCEPT_GETGROUPS modifies list when size is 0 Out-of-bounds write
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://reviews.llvm.org/D3
| |1332
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Just created LLVM review for that.
>From gcc-bugs-return-558855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 15:17:08 2017
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Subject: [Bug libstdc++/80165] Constexpr tuple of variant doesn't work
Date: Fri, 24 Mar 2017 15:17:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-24
CC| |trippels at gcc dot gnu.org
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Ville said on IRC that this issue unfortunately cannot be fix for gcc-7.
It will have to wait 'till gcc-8.
>From gcc-bugs-return-558856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 15:20:11 2017
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From: "dragondreamer at live dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/66639] declare __func__ , __FUNCTION__ & __PRETTY_FUNCTION__ as constexpr
Date: Fri, 24 Mar 2017 15:20:00 -0000
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D <dragondreamer at live dot com> changed:
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----------------------------------------------------------------------------
CC| |dragondreamer at live dot com
--- Comment #8 from D <dragondreamer at live dot com> ---
This bug is not still yet for __PRETTY_FUNCTION__. The sample code below does
not compile even with GCC 7 (however, works fine in Clang).
//////////////
constexpr bool str_equal(const char* s1, const char* s2) noexcept
{
return !*s1 && !*s2 ? true
: !*s1 ? false
: !*s2 ? false
: *s1 == *s2 ? str_equal(s1 + 1, s2 + 1)
: false;
}
int main()
{
static_assert(str_equal(__PRETTY_FUNCTION__, "int main()"), "test");
}
//////////////
<source>: In function 'int main()':
<source>:12:5: error: non-constant condition for static assertion
static_assert(str_equal(__PRETTY_FUNCTION__, "int main()"), "test");
^~~~~~~~~~~~~
<source>:12:28: in constexpr expansion of 'str_equal(((const char*)(&
__PRETTY_FUNCTION__)), ((const char*)"int main()"))'
<source>:12:5: error: the value of '__PRETTY_FUNCTION__' is not usable in a
constant expression
<source>:12:29: note: '__PRETTY_FUNCTION__' was not declared 'constexpr'
static_assert(str_equal(__PRETTY_FUNCTION__, "int main()"), "test");
^~~~~~~~~~~~~~~~~~~
Compiler exited with result code 1
>From gcc-bugs-return-558857-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 15:30:40 2017
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/80174] New: [meta-bug] Fortran lto issues
Date: Fri, 24 Mar 2017 15:30:00 -0000
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Bug ID: 80174
Summary: [meta-bug] Fortran lto issues
Product: gcc
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A meta-bug to collect Fortran and libfortran LTO issues.
>From gcc-bugs-return-558858-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 15:31:23 2017
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Subject: [Bug sanitizer/80168] [5/6/7 Regression] ICE in make_decl_rtl, at varasm.c:1311 w/ VLA and -fsanitizedress
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-24
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r202949.
>From gcc-bugs-return-558859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 15:35:09 2017
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Subject: [Bug libstdc++/80172] Segfault when using a constructed intializer list of tuple(int, variant) created through template pack expansion
Date: Fri, 24 Mar 2017 15:35:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I don't think this is valid code, that's not how std::initializer_list works.
It's not a magic array that owns its contents, it's just a pointer to some
external array and a length. In your functions the array is a local variable
inside the function, and you return a dangling initializer_list object that
refers to the local array.
If you return std::array<blah, sizeof...(I)> it works fine.
>From gcc-bugs-return-558860-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 16:07:27 2017
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Subject: [Bug sanitizer/80168] [5/6/7 Regression] ICE in make_decl_rtl, at varasm.c:1311 w/ VLA and -fsanitizedress
Date: Fri, 24 Mar 2017 16:07:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> I'm not sure this is valid given 'a' is global.
It is valid, VLA size is just an integral expression, and a is a valid
expression. The size is computed at the point where the VLA is declared (we
remember there the size in some temporary if we need it later).
>From gcc-bugs-return-558861-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 16:16:13 2017
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Subject: [Bug sanitizer/80168] [5/6/7 Regression] ICE in make_decl_rtl, at varasm.c:1311 w/ VLA and -fsanitizedress
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41047
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41047&action=edit
gcc7-pr80168.patch
Untested fix. Various comments e.g. in get_bit_range assert that
DECL_BIT_FIELD_REPRESENTATIVE in a VLA structure is guaranteed by construction
to have the same DECL_FIELD_OFFSET, so even when during low gimple they are not
the same, we should be able to use the 3rd COMPONENT_REF arguments from the
original field and the DECL_FIELD_BIT_OFFSET difference should give the actual
start differences between the field and its representative.
>From gcc-bugs-return-558863-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 16:37:58 2017
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Subject: [Bug c/41809] escaping address of packed field should trigger warning
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |meisenmann.lba@fh-salzburg.
| |ac.at
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 79918 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-558862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 16:37:58 2017
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Subject: [Bug c/79918] Feature request: Warning about (may potential) misaligned address-reference
Date: Fri, 24 Mar 2017 16:37:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Yes, it does look like a request for the same feature. I think it can be
resolved as a duplicate of it. Thanks.
*** This bug has been marked as a duplicate of bug 41809 ***
>From gcc-bugs-return-558864-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 16:42:47 2017
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Subject: [Bug target/80175] New: rs6000 target should have a strlensi pattern that works for recent powerpc processors
Date: Fri, 24 Mar 2017 16:42:00 -0000
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Bug ID: 80175
Summary: rs6000 target should have a strlensi pattern that
works for recent powerpc processors
Product: gcc
Version: unknown
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Target: powerpc64*-*-*
The existing define_expand for strlensi uses dlmzb which is only on the
405/440/464/476 processors. It would be nice to generate a reasonable inline
sequence to do strlen on recent processors, maybe power7 and up.
>From gcc-bugs-return-558865-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 16:51:47 2017
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #41 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #38)
> Simplified testcase for discussion (is not "miscompiled"):
>
> struct S {
> union { int i; } u;
> };
>
> int main()
> {
> S s;
> new (&s.u.i) float (2.0);
> S q = s;
> if (*reinterpret_cast<float *>(&q.u.i) != 2.0)
> abort ();
> }
>
> so you say q = s is valid because the object representation of the union
> is copied. I say after storing 2.0 to s.u.i the access 's' in q = s is
> invalid as you are accessing the stored value (a float) via a glvalue of
> inappropriate type.
I say what's wrong with this testcase is that storing a float in an int field
is undefined.
>From gcc-bugs-return-558866-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 17:00:35 2017
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Subject: [Bug c++/80176] New: [5/6/7 Regression] cannot bind reference to static member function using object access expression
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Bug ID: 80176
Summary: [5/6/7 Regression] cannot bind reference to static
member function using object access expression
Product: gcc
Version: 5.4.1
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struct X { static void foo(); } x;
void (&r)() = x.foo;
f.cc:2:17: error: invalid initialization of non-const reference of type ‘void
(&)()’ from an rvalue of type ‘void()’
void (&r)() = x.foo;
~~^~~
This was accepted by 4.3, but rejected since 4.4.0
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Subject: [Bug c/54032] The C compiler does not warn about casts to more aligned types
Date: Fri, 24 Mar 2017 17:28:00 -0000
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Eric Gallager <egall at gwmail dot gwu.edu> changed:
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--- Comment #2 from Eric Gallager <egall at gwmail dot gwu.edu> ---
This could probably also be marked as a duplicate of bug 41809 (like bug 79918
was) since that one is older and it looks like the same issue.
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80153] ivopt generate wrong code
Date: Fri, 24 Mar 2017 17:30:00 -0000
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--- Comment #7 from amker at gcc dot gnu.org ---
Case gcc.dg/tree-ssa/reassoc-19 failed, the ivopt dump before change is:
<bb 2> [15.00%]:
goto <bb 4>; [100.00%]
<bb 3> [85.00%]:
_1 = (sizetype) element_8(D);
_2 = -_1;
_12 = (unsigned long) element_8(D);
_11 = -_12;
_13 = rite_3 + _11;
rite_9 = _13;
bar (left_7(D), rite_9, element_8(D));
<bb 4> [100.00%]:
# rite_3 = PHI <rite_5(D)(2), rite_9(3)>
if (rite_3 >= left_7(D))
goto <bb 3>; [85.00%]
else
goto <bb 5>; [15.00%]
<bb 5> [15.00%]:
return;
But changed to below after change:
<bb 2> [15.00%]:
goto <bb 4>; [100.00%]
<bb 3> [85.00%]:
_1 = (sizetype) element_8(D);
_2 = -_1;
_12 = (unsigned long) rite_3;
_11 = (unsigned long) element_8(D);
_13 = _12 - _11;
_14 = (char *) _13;
rite_9 = _14;
bar (left_7(D), rite_9, element_8(D));
<bb 4> [100.00%]:
# rite_3 = PHI <rite_5(D)(2), rite_9(3)>
if (rite_3 >= left_7(D))
goto <bb 3>; [85.00%]
else
goto <bb 5>; [15.00%]
<bb 5> [15.00%]:
return;
I don't think this is real regression here, assembly code is the same. The
additional type conversion is introduced by get_computation_aff. Though we
have
utype: char *
ctype: char *
var->typed.type: char *
The function still computes the expression in uutype:
uutype = unsigned_type_for (utype);
which is unsigned long here.
Actually, given the computation sequence:
if (common_type != uutype)
aff_combination_convert (aff, uutype);
aff_combination_scale (&var_aff, rat);
aff_combination_add (aff, &var_aff);
I think type conversion is needed. Of course, get_computation_aff should not
introduce unnecessary uutype conversion.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/80174] [meta-bug] Fortran lto issues
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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>From gcc-bugs-return-558870-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 17:47:31 2017
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug preprocessor/78836] ICE in get_source_location_for_substring, at input.c:1461
Date: Fri, 24 Mar 2017 17:47:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Are you still seeing these issues?
Possibly a dup of one (or more) of:
PR preprocessor/79210
PR preprocessor/78811
PR preprocessor/78569
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/78732] Wrong description for Wendif-labels
Date: Fri, 24 Mar 2017 17:55:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Correct: warn_endif_labels is used by:
libcpp/directives.c: do_else
libcpp/directives.c: do_endif
which they use it to guard calls to check_eol_endif_labels.
It's not used by do_elif.
doc/cppwarnopts.texi gets this right:
> Do not warn whenever an @code{#else} or an @code{#endif} are followed by text.
> This sometimes happens in older programs with code of the form
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Fri, 24 Mar 2017 18:00:00 -0000
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--- Comment #42 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #14)
> Seems to be
>
> void move_assign(function10& f)
> {
> if (&f == this)
> return;
>
> { try {
> if (!f.empty()) {
> this->vtable = f.vtable;
> if (this->has_trivial_copy_and_destroy())
> this->functor = f.functor;
> ^^^
>
> for the aggregate copy but lineno info looks confused for the aliasing store.
Changing this aggregate copy to:
__builtin_memcpy(&this->functor, &f.functor, sizeof(f.functor));
fixes the crash on armv7hl.
No amount of may_alias attributes on the definition of the union
detail::function::function_buffer type helped.
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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++/80177] New: wrong fixit hint for misspelled static_assert: __cpp_static_assert
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Bug ID: 80177
Summary: wrong fixit hint for misspelled static_assert:
__cpp_static_assert
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In the ill-formed test case below GCC suggests to replace the misspelled
static_assert with the __cpp_static_assert feature test macro rather than with
the static_assert keyword. Using the feature test macro here would be
incorrect to the hint should suggest the latter.
(I wonder if there is a way to have the algorithm prefer non-reserved names
over reserved ones. Also, it would be nice, though I suspect difficult, if the
algorithm could prefer names with the right type. E.g., prefer a function over
a literal where a the misspelled name looks like it's being used as a
function.)
$ cat a.C && gcc -S -Wall -Wextra -Wpedantic a.C
void f ()
{
static_assertion (1 == 0, "1 == 0");
}
a.C: In function ‘void f()’:
a.C:3:3: error: ‘static_assertion’ was not declared in this scope
static_assertion (1 == 0, "1 == 0");
^~~~~~~~~~~~~~~~
a.C:3:3: note: suggested alternative: ‘__cpp_static_assert’
static_assertion (1 == 0, "1 == 0");
^~~~~~~~~~~~~~~~
__cpp_static_assert
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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++/80178] New: Class with implicitly deleted copy and move constructors usees wrong argument passing ABI
Date: Fri, 24 Mar 2017 18:09:00 -0000
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Bug ID: 80178
Summary: Class with implicitly deleted copy and move
constructors usees wrong argument passing ABI
Product: gcc
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We pass this in a register, but I think the ABI says it should be an invisible
reference, because both the copy ctor and move ctor are deleted.
struct A {
A();
A &operator=(A &&o);
void *p;
};
void foo(A);
void bar() {
foo({});
}
In this example they're implicitly defined as deleted because of the
user-provided move assignment operator, but the result is the same whether
implicitly or explicitly deleted.
EDG passes this by invisible reference. Clang passes by value, but that's
acknowledged to be a bug.
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From: "meissner at linux dot vnet.ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/78543] [6 Regression] ICE in push_reload, at reload.c:1349 on powerpc64le-linux-gnu
Date: Fri, 24 Mar 2017 18:24:00 -0000
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--- Comment #19 from Michael Meissner <meissner at linux dot vnet.ibm.com> ---
On Tue, Mar 21, 2017 at 09:00:37PM +0000, brenohl at br dot ibm.com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78543
>
> --- Comment #16 from Breno Leitao <brenohl at br dot ibm.com> ---
> If it helps, the problem is reproducible on some other packages as well. Here
> is another example:
>
> https://nopaste.linux-dev.org/?1122124
Note, the source is not complete. Please attach the file as a text file to
this bug report.
>From gcc-bugs-return-558876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 18:26:50 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/32306] [5/6/7 Regression] redundant && || not eliminated
Date: Fri, 24 Mar 2017 18:26:00 -0000
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--- Comment #34 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, could we in SCCVN recognize similarly to maybe_optimize_range_tests
inter-bb && and || tests at the end stored through PHI into an SSA_NAME without
side-effects in between and handle it (hash it and compare) as if it was
actually using && or || (or & and | ?)?
>From gcc-bugs-return-558877-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 18:29:02 2017
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Fri, 24 Mar 2017 18:29:00 -0000
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--- Comment #43 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Would something like this also work?
union function_buffer
{
[...]
mutable char data;
function_buffer() {}
function_buffer(const function_buffer &other)
{
__builtin_memcpy(this, &other, sizeof(*this));
}
function_buffer& operator = (const function_buffer &other)
{
__builtin_memcpy(this, &other, sizeof(*this));
return *this;
}
};
>From gcc-bugs-return-558878-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 18:44:39 2017
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Subject: [Bug c++/78308] Hiding of member function templates introduced by using-decl
Date: Fri, 24 Mar 2017 18:44:00 -0000
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TC <rs2740 at gmail dot com> changed:
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--- Comment #1 from TC <rs2740 at gmail dot com> ---
A rejects-valid case:
struct C {
template<int> void f();
};
struct D : C {
template<char> void f();
using C::f;
};
int main(){
D().f<0>();
}
GCC rejects as ambiguous, Clang accepts as it only considers the template<char>
one.
>From gcc-bugs-return-558879-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 18:48:30 2017
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Subject: [Bug target/80148] [7 Regression] operand has impossible constraints
Date: Fri, 24 Mar 2017 18:48:00 -0000
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--- Comment #6 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Fri Mar 24 18:47:38 2017
New Revision: 246467
URL: https://gcc.gnu.org/viewcvs?rev=246467&root=gcc&view=rev
Log:
2017-03-24 Vladimir Makarov <vmakarov@redhat.com>
PR target/80148
* lra-assigns.c (assign_by_spills): Add spilled non-reload pseudos
to consider in curr_insn_transform.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lra-assigns.c
>From gcc-bugs-return-558880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 18:52:05 2017
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Subject: [Bug preprocessor/78836] ICE in get_source_location_for_substring, at input.c:1461
Date: Fri, 24 Mar 2017 18:52:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The ICE went away shortly after I opened this report, after I made further
changes to my code. I've been meaning to resolve this bug a few times but for
some reason could never find it. Let me do that now. The stack trace in bug
78569 looks pretty close so I'll make it a dupe of it. Thanks for the ping!
*** This bug has been marked as a duplicate of bug 78569 ***
>From gcc-bugs-return-558881-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 18:52:05 2017
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Subject: [Bug preprocessor/78569] "internal compiler error: in get_substring_ranges_for_loc" processing sprintf buffer overflow
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 78836 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-558882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 18:55:42 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/80161] const argument hidden from AVX intrinsics due to OpenMP outlining
Date: Fri, 24 Mar 2017 18:55:00 -0000
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--- Comment #5 from Jeff Hammond <jeff.science at gmail dot com> ---
Thanks for the comments. Indeed, I made all the changes to the containing
project to compile in C++ and the problem went away. I will likely just switch
to the preprocessor solution for now.
For posterity, I found that Clang has the same issue, whereas ICC (Intel) does
not.
Feel free to close this as WONTFIX/INVALID unless you think it should remain
open to motivate the OpenMP IPA changes in GCC 8+.
>From gcc-bugs-return-558883-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 19:00:22 2017
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Subject: [Bug c++/66477] [constexpr] accepts-invalid with constexpr member call on non-constant reference
Date: Fri, 24 Mar 2017 19:00:00 -0000
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----------------------------------------------------------------------------
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--- Comment #2 from TC <rs2740 at gmail dot com> ---
Seems to have something to do with reference-type parameters.
struct a { constexpr int size() const { return 3; } };
constexpr bool g(a&) { return true;}
void f(a &r) {
static_assert(r.size() == 3, "error"); // accepted
static_assert(g(r), ""); // likewise
a& rr = r;
static_assert(g(rr), ""); // rejected
static_assert(rr.size()==3, ""); // likewise
}
>From gcc-bugs-return-558884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 19:01:26 2017
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Subject: [Bug middle-end/80161] const argument hidden from AVX intrinsics due to OpenMP outlining
Date: Fri, 24 Mar 2017 19:01:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jeff Hammond from comment #5)
> Thanks for the comments. Indeed, I made all the changes to the containing
> project to compile in C++ and the problem went away. I will likely just
> switch to the preprocessor solution for now.
Or you could use enum { scale = 1 }; instead of const int scale = 1;
That ought to work with both C and C++.
> For posterity, I found that Clang has the same issue, whereas ICC (Intel)
> does not.
>
> Feel free to close this as WONTFIX/INVALID unless you think it should remain
> open to motivate the OpenMP IPA changes in GCC 8+.
Yeah, I'd keep this open for GCC 8+, we do want to implement the IPA changes
there.
>From gcc-bugs-return-558885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 19:22:21 2017
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Subject: [Bug c++/66639] declare __func__ , __FUNCTION__ & __PRETTY_FUNCTION__ as constexpr
Date: Fri, 24 Mar 2017 19:22:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2017-03-24
Resolution|FIXED |---
Ever confirmed|0 |1
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
In my mind this request morphed into one for some way to get the value of the
three symbols in constexpr contexts, which is what the patch committed in
r235845 does (actually it makes it possible for just the first two symbols).
But you're right, in hindsight, as the more comprehensive test case below
shows, the implemented solution doesn't really resolve the request for __func__
et al. being declared constexpr regardless of the context. Let me reopen it.
$ cat t.C && gcc -S -Wall -Wextra -Wpedantic t.C
constexpr int foo ()
{
static_assert (0 == __builtin_strcmp (__func__, "foo"), "#1");
static_assert (0 == __builtin_strcmp (__FUNCTION__, "foo"), "#2");
static_assert (0 == __builtin_strcmp (__PRETTY_FUNCTION__, "constexpr int
foo()"), "#3");
return 1;
}
static_assert (foo (), "#4");
void bar ()
{
static_assert (0 == __builtin_strcmp (__func__, "bar"), "#5");
static_assert (0 == __builtin_strcmp (__FUNCTION__, "bar"), "#6");
static_assert (0 == __builtin_strcmp (__PRETTY_FUNCTION__, "void bar()"),
"#7");
}
t.C: In function ‘void bar()’:
t.C:14:3: error: non-constant condition for static assertion
static_assert (0 == __builtin_strcmp (__func__, "bar"), "#5");
^~~~~~~~~~~~~
t.C:14:40: error: ‘__builtin_strcmp(((const char*)(& __func__)), ((const
char*)"bar"))’ is not a constant expression
static_assert (0 == __builtin_strcmp (__func__, "bar"), "#5");
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
t.C:15:3: error: non-constant condition for static assertion
static_assert (0 == __builtin_strcmp (__FUNCTION__, "bar"), "#6");
^~~~~~~~~~~~~
t.C:15:40: error: ‘__builtin_strcmp(((const char*)(& __FUNCTION__)), ((const
char*)"bar"))’ is not a constant expression
static_assert (0 == __builtin_strcmp (__FUNCTION__, "bar"), "#6");
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
t.C:16:3: error: non-constant condition for static assertion
static_assert (0 == __builtin_strcmp (__PRETTY_FUNCTION__, "void bar()"),
"#7");
^~~~~~~~~~~~~
t.C:16:40: error: ‘__builtin_strcmp(((const char*)(& __PRETTY_FUNCTION__)),
((const char*)"void bar()"))’ is not a constant expression
static_assert (0 == __builtin_strcmp (__PRETTY_FUNCTION__, "void bar()"),
"#7");
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-558886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 19:26:14 2017
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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/79776] [7 Regression] ICE on valid code in insert_vi_for_tree, at tree-ssa-structalias.c:2807
Date: Fri, 24 Mar 2017 19:26:00 -0000
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--- Comment #6 from Martin Jambor <jamborm at gcc dot gnu.org> ---
The second time insert_vi_for_tree is called on the same decl, it is
from is from associate_varinfo_to_alias (itself called from
call_for_symbol_thunks_and_aliases), which is looking at a
(speculatively) inlined thunk:
(gdb) p node->thunk.thunk_p
$26 = true
(gdb) p node->global.inlined_to
$27 = <symtab_function 0x7ffff6a0b170 fn2/0>
(gdb) p node->callers->speculative
$30 = 1
While I feel sympathetic for any user of
call_for_symbol_thunks_and_aliases which does not expect to be handed
such a beast, I am not sure if they can ignore it. The problem is
that this inlining apparently has not been performed on the gimple
level yet and so looking at caller's body will not give you the
correct idea about the situation. invoking "call debug_function(
node->callers->caller->decl, 0)" in gdb confirms this but I do not
want to be pasting this here. Moreover, there is already no edge from
the thunk caller to the original callee, so anybody ignoring the
inlined thunk is going to miss that "call" altogether.
So I'd lean against changing call_for_symbol_thunks_and_aliases.
OTOH, if I understand associate_varinfo_to_alias well, I think that
ignoring nodes with node->global.inlined_to set there seems like a
reasonable (though untested) fix:
diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c
index c043e5ec3a6..06be189e1d1 100644
--- a/gcc/tree-ssa-structalias.c
+++ b/gcc/tree-ssa-structalias.c
@@ -7616,7 +7616,8 @@ static bool
associate_varinfo_to_alias (struct cgraph_node *node, void *data)
{
if ((node->alias || node->thunk.thunk_p)
- && node->analyzed)
+ && node->analyzed
+ && !node->global.inlined_to)
insert_vi_for_tree (node->decl, (varinfo_t)data);
return false;
}
>From gcc-bugs-return-558888-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 19:30:57 2017
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Subject: [Bug target/80102] [7 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2330
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
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Subject: [Bug target/80102] [7 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2330
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
Summary|ICE in |[7 Regression] ICE in
|maybe_record_trace_start, |maybe_record_trace_start,
|at dwarf2cfi.c:2330 |at dwarf2cfi.c:2330
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r239866.
>From gcc-bugs-return-558889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 19:45:30 2017
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #44 from Jason Merrill <jason at gcc dot gnu.org> ---
Created attachment 41048
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41048&action=edit
trial patch
Does this fix the issue? I don't have an ARM setup handy for testing.
>From gcc-bugs-return-558890-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 19:59:16 2017
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Subject: [Bug sanitizer/80168] [5/6/7 Regression] ICE in make_decl_rtl, at varasm.c:1311 w/ VLA and -fsanitizedress
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|accepts-invalid |
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Just a small clarification: The VLA typedef in the test case is valid, but its
use to define a member of a struct is strictly not conforming. It's accepted
by GCC as an extension and diagnosed by -Wpedantic. I've adjusted the Keywords
accordingly.
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Agreed, thanks.
Note that GCC does not warn on this code on STRICT_ALIGNMENT targets (such as
arm-linux-gnueabi.)
*** This bug has been marked as a duplicate of bug 41809 ***
>From gcc-bugs-return-558892-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 20:05:30 2017
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Subject: [Bug c/41809] escaping address of packed field should trigger warning
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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CC| |rguenth at gcc dot gnu.org
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 54032 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-558893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 20:13:43 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80176] [5/6/7 Regression] cannot bind reference to static member function using object access expression
Date: Fri, 24 Mar 2017 20:13:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-24
CC| |msebor at gcc dot gnu.org
Known to work| |4.3.0
Ever confirmed|0 |1
Known to fail| |4.4.3, 4.5.3, 4.8.3, 4.9.3,
| |5.3.0, 6.2.0, 7.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Bisection suggests r143446 in GCC 4.4.0 as the breaking change.
>From gcc-bugs-return-558894-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 20:28:36 2017
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Subject: [Bug debug/51358] incorrect/missing location for function arg, -O0, without VTA
Date: Fri, 24 Mar 2017 20:28:00 -0000
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--- Comment #13 from Ben Woodard <woodard at redhat dot com> ---
This adds some additional complexity to a feature request in
https://sourceware.org/bugzilla/show_bug.cgi?id=19949. It would be helpful it
were resolved.
>From gcc-bugs-return-558895-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 20:34:11 2017
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Subject: [Bug translation/80055] do not mark internal compiler error messages for i18n
Date: Fri, 24 Mar 2017 20:34:00 -0000
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--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to Frederic Marchal from comment #2)
> I suggest instead that internal messages be identified as such. Some other
> messages begin with "Internal error". I would favor that solution for
> messages not meant to the end user.
Would this prefix be for the benefit of the user, or for translator? (or
both?)
I believe that everywhere we're using internal_error, the diagnostics machinery
will add "internal compiler error: " as a prefix when the message is emitted to
the user, and I believe this prefix is translated.
>From gcc-bugs-return-558896-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 21:18:43 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Fri, 24 Mar 2017 21:18:00 -0000
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--- Comment #45 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #32)
> So you need to place may-alias at a point to make the following
> stmt safe:
>
> > c = *p;
>
> which means placing it on B, not only on the union (p is a B).
>
> Thus do
>
> struct B
> {
> int x;
> union U
> {
> int a;
> char b[sizeof (float)];
> } u;
> int y;
> } __attribute__((may_alias));
In the real code there is no B, there is just the union, and it is assigned
directly, so it's more like:
union function_buffer_members {
void* p;
void(*fp)();
};
union function_buffer {
function_buffer_members members;
char data[sizeof(function_buffer_members)];
};
struct function_base {
mutable function_buffer functor;
};
struct function : function_base {
void func(const function& f) {
this->functor = f.functor;
}
};
So it should only be necessary to put __attribute__((may_alias)) on union
function_buffer, right? That doesn't fix the problem though.
>From gcc-bugs-return-558897-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 21:43:46 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79904] ICE in annotate_constant_pool_refs, at config/s390/s390.c:7909
Date: Fri, 24 Mar 2017 21:43:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Mar 24 21:43:08 2017
New Revision: 246468
URL: https://gcc.gnu.org/viewcvs?rev=246468&root=gcc&view=rev
Log:
PR sanitizer/79904
* gcc.dg/ubsan/pr79904-2.c: Add -Wno-psabi to dg-options.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/ubsan/pr79904-2.c
>From gcc-bugs-return-558899-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 22:35:26 2017
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From: "bernd.edlinger at hotmail dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Fri, 24 Mar 2017 22:35:00 -0000
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--- Comment #46 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Jonathan Wakely from comment #45)
> (In reply to rguenther@suse.de from comment #32)
> > So you need to place may-alias at a point to make the following
> > stmt safe:
> >
> > > c = *p;
> >
> > which means placing it on B, not only on the union (p is a B).
> >
> > Thus do
> >
> > struct B
> > {
> > int x;
> > union U
> > {
> > int a;
> > char b[sizeof (float)];
> > } u;
> > int y;
> > } __attribute__((may_alias));
>
> In the real code there is no B, there is just the union, and it is assigned
> directly, so it's more like:
>
> union function_buffer_members {
> void* p;
> void(*fp)();
> };
>
> union function_buffer {
> function_buffer_members members;
> char data[sizeof(function_buffer_members)];
> };
>
> struct function_base {
> mutable function_buffer functor;
> };
>
> struct function : function_base {
> void func(const function& f) {
> this->functor = f.functor;
> }
> };
>
> So it should only be necessary to put __attribute__((may_alias)) on union
> function_buffer, right? That doesn't fix the problem though.
Yes, it seems, the __attribute__((may_alias)) does not propagate from
structure members to enclosing structure:
If B has the may_alias, but it is a member of C
then the test case fails again:
inline void* operator new(__SIZE_TYPE__, void *p) { return p; }
struct A { A (float x) : f (x) {} float f; };
struct B
{
int x;
union U
{
int a;
char b[sizeof (float)];
} u;
int y;
} __attribute__((may_alias));
struct C
{
struct B b;
};
__attribute__((noinline, noclone)) void
bar (B &x, B &y)
{
if (x.x != 0 || x.y != 3 || y.x != 0 || y.y != 3)
__builtin_abort ();
float f;
__builtin_memcpy (&f, x.u.b, sizeof (float));
if (f != 3.5f)
__builtin_abort ();
__builtin_memcpy (&f, y.u.b, sizeof (float));
if (f != 3.5f)
__builtin_abort ();
}
__attribute__((noinline, noclone))
C *
baz (C &x)
{
return &x;
}
__attribute__((noinline, noclone)) void
foo (float x)
{
C b { 0, {}, 3 }, c;
C *p = baz (b);
new (b.b.u.b) A (x);
c.b = p->b;
bar (p->b, c.b);
}
int
main ()
{
foo (3.5f);
}
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80179] New: ICE initializing a static local object with flexible array member in verify_ctor_sanity, at cp/constexpr.c:2641
Date: Fri, 24 Mar 2017 22:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80179
Bug ID: 80179
Summary: ICE initializing a static local object with flexible
array member in verify_ctor_sanity, at
cp/constexpr.c:2641
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
Prior to r231665 the test case below (reduced from the one for bug 69912
(flexary15.C) was rejected with the error:
t.C: In function ‘void bar(const char*)’:
t.C:8:38: error: too many initializers for ‘const char* [0]’
static const S t = { 1, { a, "b" } };
^
With r231665, GCC fails with an ICE:
$ cat y.C && gcc -S -Wall -Wextra -Wpedantic y.C
struct S {
int n;
const char *a[];
};
void bar (const char *a)
{
static const S t = { 1, { a, "b" } };
}
y.C:3:17: warning: ISO C++ forbids flexible array member ‘a’ [-Wpedantic]
const char *a[];
^
y.C: In function ‘void bar(const char*)’:
y.C:8:38: warning: initialization of a flexible array member [-Wpedantic]
static const S t = { 1, { a, "b" } };
^
y.C:8:38: internal compiler error: in verify_ctor_sanity, at
cp/constexpr.c:2641
0xaa9e05 verify_ctor_sanity
/src/gcc/git/gcc/cp/constexpr.c:2640
0xaaa042 cxx_eval_bare_aggregate
/src/gcc/git/gcc/cp/constexpr.c:2670
0xab12e0 cxx_eval_constant_expression
/src/gcc/git/gcc/cp/constexpr.c:4346
0xaaa190 cxx_eval_bare_aggregate
/src/gcc/git/gcc/cp/constexpr.c:2688
0xab12e0 cxx_eval_constant_expression
/src/gcc/git/gcc/cp/constexpr.c:4346
0xab275e cxx_eval_outermost_constant_expr
/src/gcc/git/gcc/cp/constexpr.c:4634
0xab3832 maybe_constant_init(tree_node*, tree_node*)
/src/gcc/git/gcc/cp/constexpr.c:4956
0x8b3e82 store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
/src/gcc/git/gcc/cp/typeck2.c:825
0x7f4aad check_initializer
/src/gcc/git/gcc/cp/decl.c:6365
0x7f808c cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
/src/gcc/git/gcc/cp/decl.c:7037
0x942597 cp_parser_init_declarator
/src/gcc/git/gcc/cp/parser.c:19384
0x9366d8 cp_parser_simple_declaration
/src/gcc/git/gcc/cp/parser.c:12781
0x936250 cp_parser_block_declaration
/src/gcc/git/gcc/cp/parser.c:12599
0x9356ce cp_parser_declaration_statement
/src/gcc/git/gcc/cp/parser.c:12208
0x931e5c cp_parser_statement
/src/gcc/git/gcc/cp/parser.c:10695
0x932a71 cp_parser_statement_seq_opt
/src/gcc/git/gcc/cp/parser.c:11027
0x93296e cp_parser_compound_statement
/src/gcc/git/gcc/cp/parser.c:10981
0x946555 cp_parser_function_body
/src/gcc/git/gcc/cp/parser.c:21430
0x94671c cp_parser_ctor_initializer_opt_and_function_body
/src/gcc/git/gcc/cp/parser.c:21466
0x94fabf cp_parser_function_definition_after_declarator
/src/gcc/git/gcc/cp/parser.c:26254
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-558900-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 22:38:43 2017
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Subject: [Bug rtl-optimization/80112] [5/6 Regression] ICE in doloop_condition_get at loop-doloop.c:158
Date: Fri, 24 Mar 2017 22:38:00 -0000
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Roman Zhuykov <zhroma at ispras dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zhroma at ispras dot ru
--- Comment #5 from Roman Zhuykov <zhroma at ispras dot ru> ---
Created attachment 41049
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41049&action=edit
maybe more proper fix
6 years ago I was solving issue with same code lines and with Richard
Sandiford's help found a bit better solution, it was even approved, but
unfortunately we forgot to commit it. Discussion links:
https://gcc.gnu.org/ml/gcc-patches/2011-07/msg01803.html
https://gcc.gnu.org/ml/gcc-patches/2011-09/msg02049.html
https://gcc.gnu.org/ml/gcc-patches/2012-02/msg00479.html
Maybe it's better to apply that old patch?
PS. All my modulo-sched improvements described here together
https://gcc.gnu.org/ml/gcc-patches/2017-02/msg01647.html
>From gcc-bugs-return-558901-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 22:39:35 2017
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Subject: [Bug target/80102] [7 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2330
Date: Fri, 24 Mar 2017 22:39:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This needs -mcpu=power8 to fail.
>From gcc-bugs-return-558902-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 22:43:31 2017
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Subject: [Bug c++/80179] ICE initializing a static local object with flexible array member in verify_ctor_sanity, at cp/constexpr.c:2641
Date: Fri, 24 Mar 2017 22:43:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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Known to fail| |6.3.0, 7.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
In C the test case isn't strictly conforming because it uses a non-constant
initializer for a static object (for which it's rejected by GCC), and because C
doesn't allow initializing objects with flexible array members.
In C++ where such initializers are allowed it is meant to be accepted by G++
which also supports static initialization of flexible array members as an
extension.
>From gcc-bugs-return-558904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 22:58:57 2017
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Subject: [Bug target/78543] [6 Regression] ICE in push_reload, at reload.c:1349 on powerpc64le-linux-gnu
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Michael Meissner <meissner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Attachment #41035|0 |1
is obsolete| |
--- Comment #20 from Michael Meissner <meissner at gcc dot gnu.org> ---
Created attachment 41050
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41050&action=edit
Proposed patch to fix the problem (rework)
This patch reworks the original patch I submitted, to try and make it less
hacky. It separates the bswap insns where there is hardware support into
separate read, write, and register swap instructions. This is because the
register allocators will try to push the bswap value in a register to the stack
and do the load based swap with reverse bytes. Reload fumbles in certain
conditions. LRA generates working code, but the store and the load with byte
reverse from the same location, can slow things down compared to the operation
on registers.
I only did this optimization where we had the hardware support (i.e. bswap for
HImode all of the time, bswap for SImode all of the time, and bswap for DImode
if we are executing 64-bit instructions and the machine has LDBRX/STDBRX --
power7 and newer/cell ppc).
I have done bootstrap builds on a little endian power8 system, on a big endian
power8 system, and a big endian power7 system (both 32/64-bit support on this
last system). There were no regressions.
I am building the patches applied to gcc 6 right now. The patches apply
cleanly to gcc 6. I suspect it will also build on gcc 5.
I built spec 2006 benchmarks with the compiler. There are 12 benchmarks that
generate one or more load/store with byte swap instructions (perlbench, gcc,
gamess, milc, zeusmp, calculix, h264ref, tonto, omnetpp, wrf, sphinx3,
xalancbmk).
I compared the instructions generated. 10 of the benchmarks generated the same
instructions.
Milc generated 1 less load with byte swap instruction and 1 more store with
byte swap instruction.
Sphinx3 generated 6 less load with byte swap instructions and 6 more store with
byte swap instructions.
So I count this as the same level of byte swapping is being generated.
>From gcc-bugs-return-558903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 22:58:50 2017
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Fri, 24 Mar 2017 22:58:00 -0000
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--- Comment #47 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Bernd Edlinger from comment #46)
> Yes, it seems, the __attribute__((may_alias)) does not propagate from
> structure members to enclosing structure:
What enclosing structure? You're apparently agreeing with me, but saying
something different. In the real code, and the example above, _there_ _is_ _no_
_enclosing_ _structure_. I understand that it doesn't propagate to enclosing
structures, that's fine. But if a type X has the attribute then it doesn't need
to propagate anywhere, it should affect X. But it doesn't fix the original bug
that started all this.
>From gcc-bugs-return-558905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 23:07:09 2017
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Subject: [Bug target/78543] [6 Regression] ICE in push_reload, at reload.c:1349 on powerpc64le-linux-gnu
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--- Comment #21 from Michael Meissner <meissner at gcc dot gnu.org> ---
The backport to GCC 6 also succeeded with no regressions on a little endian
power8 system.
>From gcc-bugs-return-558906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Mar 24 23:26:49 2017
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
--- Comment #48 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Jonathan Wakely from comment #47)
> (In reply to Bernd Edlinger from comment #46)
> > Yes, it seems, the __attribute__((may_alias)) does not propagate from
> > structure members to enclosing structure:
>
> What enclosing structure? You're apparently agreeing with me, but saying
> something different. In the real code, and the example above, _there_ _is_
> _no_ _enclosing_ _structure_. I understand that it doesn't propagate to
> enclosing structures, that's fine. But if a type X has the attribute then it
> doesn't need to propagate anywhere, it should affect X. But it doesn't fix
> the original bug that started all this.
I think I agree with you, that is surprising that the may_alias
does not do what we need.
I think the enclosing structure is:
class function_base
{
public:
function_base() : vtable(0) { }
[...]
public:
detail::function::vtable_base* get_vtable() const {
return reinterpret_cast<detail::function::vtable_base*>(
reinterpret_cast<std::size_t>(vtable) &
~static_cast<std::size_t>(0x01));
}
bool has_trivial_copy_and_destroy() const {
return reinterpret_cast<std::size_t>(vtable) & 0x01;
}
detail::function::vtable_base* vtable;
mutable detail::function::function_buffer functor;
};
well, in fact even further down the class hierarchy.
the offending statement is:
this->functor = f.functor;
I think, if a functor may in general alias to anything,
it is possible that the outer object does not alias.
Does that make sense?
>From gcc-bugs-return-558907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 00:57:58 2017
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From: "teisenbe at google dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80180] New: Incorrect codegen from rdseed intrinsic use
Date: Sat, 25 Mar 2017 00:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80180
Bug ID: 80180
Summary: Incorrect codegen from rdseed intrinsic use
Product: gcc
Version: 6.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: teisenbe at google dot com
Target Milestone: ---
Created attachment 41051
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41051&action=edit
Preprocessed source file
When the attached source is compiled, the resulting assembly improperly handles
the success bit (CF) for rdseed. The instruction immediately following "rdseed
%rax" is "testl %r8d, r8d" which clears CF. The debug information does
identify the "setc" that should follow rdseed, but it is no where near the
rdseed instruction.
gcc -v output:
Using built-in specs.
COLLECT_GCC=./prebuilt/downloads/x86_64-elf-6.2.0-Linux-x86_64/bin/x86_64-elf-gcc
COLLECT_LTO_WRAPPER=/home/teisenbe/src/magenta/magenta/prebuilt/downloads/x86_64-elf-6.2.0-Linux-x86_64/bin/../libexec/gcc/x86_64-elf/6.2.0/lto-wrapper
Target: x86_64-elf
Configured with: ../gcc-6.2.0/configure --with-included-gettext
--target=x86_64-elf
--prefix=/home/phosek/fuchsia/third_party/gcc_none_toolchains/x86_64-elf-6.2.0-Linux-x86_64
--enable-languages=c,c++ --disable-werror --enable-initfini-array
Thread model: single
gcc version 6.2.0 (GCC)
Command used to generate:
./prebuilt/downloads/x86_64-elf-6.2.0-Linux-x86_64/bin/x86_64-elf-gcc -O2 -g
-finline -include ./build-magenta-pc-x86-64/config-global.h -Wall -Wextra
-Wno-multichar -Werror -Wno-error=deprecated-declarations -Wno-unused-parameter
-Wno-unused-function -Wno-unused-label -Werror=return-type -fno-common
-Wno-nonnull-compare -fasynchronous-unwind-tables -ffunction-sections
-fdata-sections -fno-pic -ffreestanding -include
./build-magenta-pc-x86-64/config-kernel.h -Wformat=2 -Wformat-signedness
-fno-omit-frame-pointer -falign-jumps=1 -falign-loops=1 -falign-functions=4
-msoft-float -mno-mmx -mno-sse -mno-sse2 -mno-3dnow -mno-avx -mno-avx2
-mno-80387 -mno-fp-ret-in-387 -mcmodel=kernel -mno-red-zone -mskip-rax-setup
-mrdseed --include ./build-magenta-pc-x86-64/dev/intel_rng/config-module.h
--std=c11 -Werror-implicit-function-declaration -Wstrict-prototypes
-Wwrite-strings -Wmissing-prototypes -Isystem/public -Isystem/private
-I./build-magenta-pc-x86-64/gen/include -I./build-magenta-pc-x86-64
-Ikernel/include -Isystem/include -Ithird_party/include
-Ikernel/target/pc-x86/include -Ikernel/platform/pc/include
-Ikernel/arch/x86/include -Ikernel/top/include -Ikernel/kernel/include
-Ikernel/app/include -Ikernel/app/stringtests/include
-Ikernel/app/tests/include -Ikernel/dev/include -Ikernel/dev/intel_rng/include
-Ikernel/dev/interrupt/include -Ikernel/dev/pcie/include
-Isystem/ulib/bitmap/include -Ikernel/lib/bitmap/include
-Ikernel/lib/cbuf/include -Ikernel/lib/debugcommands/include
-Ikernel/lib/debuglog/include -Ikernel/lib/fixed_point/include
-Ikernel/lib/gfxconsole/include -Ikernel/lib/ktrace/include
-Ikernel/lib/mtrace/include -Ikernel/lib/pow2_range_allocator/include
-Ikernel/lib/syscalls/include -Ikernel/lib/userboot/include
-Ikernel/lib/version/include -Ikernel/platform/include -Ikernel/target/include
-Ithird_party/lib/acpica/source/include -Ithird_party/lib/acpica/include
-Ikernel/dev/hw_rng/include -Ikernel/kernel/vm/include
-Ikernel/lib/console/include -Ikernel/lib/crypto/include
-Ikernel/lib/debug/include -Ikernel/lib/font/include -Ikernel/lib/gfx/include
-Ikernel/lib/header_tests/include -Ikernel/lib/heap/include
-Ikernel/lib/heap/include -Ikernel/lib/libc/include
-Ikernel/lib/magenta/include -Ikernel/lib/mxtl/include
-Isystem/ulib/mxtl/include -Ikernel/lib/mxtl/include
-Isystem/ulib/region-alloc/include -Ikernel/lib/region-alloc/include
-Ikernel/lib/unittest/include -Ikernel/lib/user_copy/include
-Ikernel/lib/vdso/include -Ithird_party/lib/safeint/source/include
-Ithird_party/lib/safeint/include -Ikernel/dev/udisplay/include
-Ikernel/lib/dpc/include -Ikernel/lib/heap/cmpctmalloc/include
-Ikernel/lib/io/include -Ithird_party/ulib/cryptolib/include
-Ithird_party/lib/cryptolib/include -Ithird_party/ulib/qrcodegen/include
-Ithird_party/lib/qrcodegen/include -c kernel/dev/intel_rng/intel-rng.c -MD -MP
-MT build-magenta-pc-x86-64/dev/intel_rng/kernel/dev/intel_rng/intel-rng.c.o
-MF build-magenta-pc-x86-64/dev/intel_rng/kernel/dev/intel_rng/intel-rng.c.d -o
build-magenta-pc-x86-64/dev/intel_rng/kernel/dev/intel_rng/intel-rng.c.o
--save-temps
Compiler console output: None
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Subject: [Bug target/80160] [7 regression] operand has impossible constraints
Date: Sat, 25 Mar 2017 01:12:00 -0000
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--- Comment #7 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Author: bernds
Date: Sat Mar 25 01:12:04 2017
New Revision: 246473
URL: https://gcc.gnu.org/viewcvs?rev=246473&root=gcc&view=rev
Log:
PR rtl-optimization/80160
PR rtl-optimization/80159
* lra-assigns.c (must_not_spill_p): Tighten new test to also take
reg_alternate_class into account.
* gcc.target/i386/pr80160.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr80160.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lra-assigns.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/80159] [7 regression] gcc takes very long time with -Os
Date: Sat, 25 Mar 2017 01:12:00 -0000
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--- Comment #4 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Author: bernds
Date: Sat Mar 25 01:12:04 2017
New Revision: 246473
URL: https://gcc.gnu.org/viewcvs?rev=246473&root=gcc&view=rev
Log:
PR rtl-optimization/80160
PR rtl-optimization/80159
* lra-assigns.c (must_not_spill_p): Tighten new test to also take
reg_alternate_class into account.
* gcc.target/i386/pr80160.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr80160.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lra-assigns.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/80181] New: [7 Regression] ICE in set_lattice_value, at tree-ssa-ccp.c:505
Date: Sat, 25 Mar 2017 03:21:00 -0000
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Bug ID: 80181
Summary: [7 Regression] ICE in set_lattice_value, at
tree-ssa-ccp.c:505
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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gcc-7.0.0-alpha20170319 snapshot ICEs when compiling the following snippet w/
-O2 (-Os, -O3, -Ofast):
int
nr (void)
{
}
void
it (int dl)
{
int vp = 0;
for (;;)
{
dl = vp ^ nr ();
dl ^= vp;
vp = 1;
}
}
% gcc-7.0.0-alpha20170319 -O2 -w -c btw2qvlq.c
btw2qvlq.c: In function 'it':
btw2qvlq.c:17:1: internal compiler error: in set_lattice_value, at
tree-ssa-ccp.c:505
}
^
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Subject: [Bug c++/70974] armv8-a+crc does not define __ARM_ACLE
Date: Sat, 25 Mar 2017 03:39:00 -0000
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Dan Mick <dmick at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmick at redhat dot com
--- Comment #1 from Dan Mick <dmick at redhat dot com> ---
Me too, on both these versions: Centos 7.3.1611:
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/aarch64-redhat-linux/4.8.5/lto-wrapper
Target: aarch64-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-linker-build-id --with-linker-hash-style=gnu
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada,lto --enable-plugin
--enable-initfini-array --disable-libgcj
--with-isl=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/isl-install
--with-cloog=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/cloog-install
--enable-gnu-indirect-function --build=aarch64-redhat-linux
Thread model: posix
gcc version 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC)
and Ubuntu Xenial:
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/aarch64-linux-gnu/5/lto-wrapper
Target: aarch64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
5.4.0-6ubuntu1~16.04.4' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-libquadmath --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-arm64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-arm64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-arm64
--with-arch-directory=aarch64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-multiarch --enable-fix-cortex-a53-843419 --disable-werror
--enable-checking=release --build=aarch64-linux-gnu --host=aarch64-linux-gnu
--target=aarch64-linux-gnu
Thread model: posix
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>From gcc-bugs-return-558912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 04:27:38 2017
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80160] [7 regression] operand has impossible constraints
Date: Sat, 25 Mar 2017 04:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80160
Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Jeffrey A. Law <law at redhat dot com> ---
Fixed by Bernd's patch on the trunk.
>From gcc-bugs-return-558913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 04:28:08 2017
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/80159] [7 regression] gcc takes very long time with -Os
Date: Sat, 25 Mar 2017 04:28:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #5 from Jeffrey A. Law <law at redhat dot com> ---
Fixed by Bernd's patch on the trunk.
>From gcc-bugs-return-558914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 04:31:12 2017
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Subject: [Bug target/80148] [7 Regression] operand has impossible constraints
Date: Sat, 25 Mar 2017 04:31:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #7 from Jeffrey A. Law <law at redhat dot com> ---
Fixed by Vlad's commit on the trunk.
>From gcc-bugs-return-558915-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 04:31:13 2017
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80160] [7 regression] operand has impossible constraints
Date: Sat, 25 Mar 2017 04:31:00 -0000
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Bug 80160 depends on bug 80148, which changed state.
Bug 80148 Summary: [7 Regression] operand has impossible constraints
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80148
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>From gcc-bugs-return-558916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 07:07:51 2017
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From: "bernd.edlinger at hotmail dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Sat, 25 Mar 2017 07:07:00 -0000
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--- Comment #49 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
While I think that adding explicit copy/assignment constructors
as in comment #43 should work and looks like the most portable
solution for boost, I am unsure if may_alias shouldn't really
work different.
I thought of another use of may_alias that also applies to C:
Isn't the plan to add may_alias to the struct sockaddr_storage ?
And wouldn't you then expect to add a sockaddr_storage
to a structure like:
struct A
{
struct sockaddr_storage s;
};
does'nt that mean that
A a, b;
a.s = b.s;
will also ignore the may_alias ?
>From gcc-bugs-return-558917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 10:42:27 2017
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/80156] [7 Regression] Generic DTIO interface reported missing if public statement preceeds the interface block
Date: Sat, 25 Mar 2017 10:42:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
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Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
This, of course, is mine.
I can fix this and prevent the ICE of PR79832 but I see no way at the moment to
retain the error message of the latter.
Cheers
Paul
>From gcc-bugs-return-558918-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 10:44:45 2017
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Subject: [Bug fortran/80156] [7 Regression] Generic DTIO interface reported missing if public statement preceeds the interface block
Date: Sat, 25 Mar 2017 10:44:00 -0000
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--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I can fix this and prevent the ICE of PR79832 ...
Is this the right PR?
>From gcc-bugs-return-558919-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 11:37:26 2017
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From: "nikhil.pinnaparaju at research dot iiit.ac.in" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/80182] New: gcc -lm -o
Date: Sat, 25 Mar 2017 11:37:00 -0000
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Bug ID: 80182
Summary: gcc -lm -o
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
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Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: nikhil.pinnaparaju at research dot iiit.ac.in
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When using the command "gcc -lm -o <filename.c>". When trying to link math,
using that combination of flags caused me to lose several hours of work on code
which is really frustrating. Additionally i had thought the file could have
been sent to the trash bin or made hidden but it was no where to be found.
>From gcc-bugs-return-558920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 12:12:34 2017
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80183] New: [7 Regression] Conditional jump or move depends on uninitialised value: std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)
Date: Sat, 25 Mar 2017 12:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80183
Bug ID: 80183
Summary: [7 Regression] Conditional jump or move depends on
uninitialised value:
std::local_Rb_tree_decrement(std::_Rb_tree_node_base*)
(tree.cc:97)
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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Running clang-format under valgrind shows:
==69398== Conditional jump or move depends on uninitialised value(s)
==69398== at 0x42D3B08:
std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)
==69398== by 0x101B12FF:
std::_Rb_tree_const_iterator<clang::tooling::Replacement>::operator--() (in
/home/trippels/llvm_build/bin/clang-format)
==69398== by 0x101B17FF:
std::reverse_iterator<std::_Rb_tree_const_iterator<clang::tooling::Replacement>
>::operator->() const (in /home/trippels/llvm_build/bin/clang-format)
==69398== by 0x101B0597:
clang::tooling::applyAllReplacements[abi:cxx11](llvm::StringRef,
clang::tooling::Replacements const&) (in
/home/trippels/llvm_build/bin/clang-format)
==69398== by 0x101099FB: clang::format::reformat(clang::format::FormatStyle
const&, llvm::StringRef, llvm::ArrayRef<clang::tooling::Range>,
llvm::StringRef,
bool*)::{lambda(clang::format::TokenAnalyzer&)#1}::operator()(clang::format::TokenAnalyzer&)
const (in /home/trippels/llvm_build/bin/clang-format)
==69398== by 0x10109E67: clang::format::reformat(clang::format::FormatStyle
const&, llvm::StringRef, llvm::ArrayRef<clang::tooling::Range>,
llvm::StringRef, bool*) (in /home/trippels/llvm_build/bin/clang-format)
==69398== by 0x1000C603: clang::format::format(llvm::StringRef) (in
/home/trippels/llvm_build/bin/clang-format)
==69398== by 0x1000D1D7: main (in
/home/trippels/llvm_build/bin/clang-format)
==69398==
==69398== Conditional jump or move depends on uninitialised value(s)
==69398== at 0x42D3B08:
std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)
==69398== by 0x101B12FF:
std::_Rb_tree_const_iterator<clang::tooling::Replacement>::operator--() (in
/home/trippels/llvm_build/bin/clang-format)
==69398== by 0x101B17FF:
std::reverse_iterator<std::_Rb_tree_const_iterator<clang::tooling::Replacement>
>::operator->() const (in /home/trippels/llvm_build/bin/clang-format)
==69398== by 0x101B05BF:
clang::tooling::applyAllReplacements[abi:cxx11](llvm::StringRef,
clang::tooling::Replacements const&) (in
/home/trippels/llvm_build/bin/clang-format)
==69398== by 0x101099FB: clang::format::reformat(clang::format::FormatStyle
const&, llvm::StringRef, llvm::ArrayRef<clang::tooling::Range>,
llvm::StringRef,
bool*)::{lambda(clang::format::TokenAnalyzer&)#1}::operator()(clang::format::TokenAnalyzer&)
const (in /home/trippels/llvm_build/bin/clang-format)
==69398== by 0x10109E67: clang::format::reformat(clang::format::FormatStyle
const&, llvm::StringRef, llvm::ArrayRef<clang::tooling::Range>,
llvm::StringRef, bool*) (in /home/trippels/llvm_build/bin/clang-format)
==69398== by 0x1000C603: clang::format::format(llvm::StringRef) (in
/home/trippels/llvm_build/bin/clang-format)
==69398== by 0x1000D1D7: main (in
/home/trippels/llvm_build/bin/clang-format)
==69398==
==69398== Conditional jump or move depends on uninitialised value(s)
==69398== at 0x42D3B08:
std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)
==69398== by 0x101B12FF:
std::_Rb_tree_const_iterator<clang::tooling::Replacement>::operator--() (in
/home/trippels/llvm_build/bin/clang-format)
==69398== by 0x101B17FF:
std::reverse_iterator<std::_Rb_tree_const_iterator<clang::tooling::Replacement>
>::operator->() const (in /home/trippels/llvm_build/bin/clang-format)
==69398== by 0x101B05E7:
clang::tooling::applyAllReplacements[abi:cxx11](llvm::StringRef,
clang::tooling::Replacements const&) (in
/home/trippels/llvm_build/bin/clang-format)
==69398== by 0x101099FB: clang::format::reformat(clang::format::FormatStyle
const&, llvm::StringRef, llvm::ArrayRef<clang::tooling::Range>,
llvm::StringRef,
bool*)::{lambda(clang::format::TokenAnalyzer&)#1}::operator()(clang::format::TokenAnalyzer&)
const (in /home/trippels/llvm_build/bin/clang-format)
==69398== by 0x10109E67: clang::format::reformat(clang::format::FormatStyle
const&, llvm::StringRef, llvm::ArrayRef<clang::tooling::Range>,
llvm::StringRef, bool*) (in /home/trippels/llvm_build/bin/clang-format)
==69398== by 0x1000C603: clang::format::format(llvm::StringRef) (in
/home/trippels/llvm_build/bin/clang-format)
==69398== by 0x1000D1D7: main (in
/home/trippels/llvm_build/bin/clang-format)
==69398==
==69398== Conditional jump or move depends on uninitialised value(s)
==69398== at 0x42D3B08:
std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)
==69398== by 0x101B12FF:
std::_Rb_tree_const_iterator<clang::tooling::Replacement>::operator--() (in
/home/trippels/llvm_build/bin/clang-format)
==69398== by 0x101B06DF:
clang::tooling::applyAllReplacements[abi:cxx11](llvm::StringRef,
clang::tooling::Replacements const&) (in
/home/trippels/llvm_build/bin/clang-format)
==69398== by 0x101099FB: clang::format::reformat(clang::format::FormatStyle
const&, llvm::StringRef, llvm::ArrayRef<clang::tooling::Range>,
llvm::StringRef,
bool*)::{lambda(clang::format::TokenAnalyzer&)#1}::operator()(clang::format::TokenAnalyzer&)
const (in /home/trippels/llvm_build/bin/clang-format)
==69398== by 0x10109E67: clang::format::reformat(clang::format::FormatStyle
const&, llvm::StringRef, llvm::ArrayRef<clang::tooling::Range>,
llvm::StringRef, bool*) (in /home/trippels/llvm_build/bin/clang-format)
==69398== by 0x1000C603: clang::format::format(llvm::StringRef) (in
/home/trippels/llvm_build/bin/clang-format)
==69398== by 0x1000D1D7: main (in
/home/trippels/llvm_build/bin/clang-format)
This happens even when llvm/clang is build with -O0 and also when build with
clang.
gcc-6 libstdc++.so.6 works fine. And clang with -stdlib=libc++ also is fine.
So it looks like a libstdc++ regression. Sorry, but I have no testcase yet.
>From gcc-bugs-return-558921-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 12:18:00 2017
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Subject: [Bug c/80182] gcc -lm -o
Date: Sat, 25 Mar 2017 12:18:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-03-25
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Do you that you were getting undefined symbols when having -lm before any
object/source file? If so this is not a gcc bug (or a linker one). This is how
single pass linker work. Note if libm is a shared library normally it would
force the linker to link to it except on Linux distros where --as-needed is
default.
>From gcc-bugs-return-558922-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 12:19:22 2017
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Subject: [Bug libstdc++/80183] [7 Regression] Conditional jump or move depends on uninitialised value: std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)
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--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 41052
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41052&action=edit
testcase. valgrind clang-format bench.ii
>From gcc-bugs-return-558923-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 13:11:14 2017
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Subject: [Bug fortran/80156] [7 Regression] Generic DTIO interface reported missing if public statement preceeds the interface block
Date: Sat, 25 Mar 2017 13:11:00 -0000
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--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #6)
> > I can fix this and prevent the ICE of PR79832 ...
>
> Is this the right PR?
Well caught! PR79382.
Paul
>From gcc-bugs-return-558925-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 14:09:27 2017
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Subject: [Bug fortran/68241] [meta-bug] [F03] Deferred-length character
Date: Sat, 25 Mar 2017 14:09:00 -0000
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Bug 68241 depends on bug 49630, which changed state.
Bug 49630 Summary: [OOP] ICE on obsolescent deferred-length type bound character function
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49630
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
>From gcc-bugs-return-558924-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 14:09:27 2017
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Subject: [Bug fortran/49630] [OOP] ICE on obsolescent deferred-length type bound character function
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I am still having an ICE as in comment 11.
Me too even on trunk (7.0.1)!-(I also get an ICE with the original test.)
Reopening the PR.
> Opening a new bug.
Did you do it?
>From gcc-bugs-return-558926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 14:55:25 2017
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Subject: [Bug testsuite/80184] New: FAIL: gcc.dg/torture/pr79732.c -O* (test for excess errors) on darwin
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Bug ID: 80184
Summary: FAIL: gcc.dg/torture/pr79732.c -O* (test for excess
errors) on darwin
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: dominiq at lps dot ens.fr
CC: iains at gcc dot gnu.org, rguenth at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-apple-darwin*
Target: x86_64-apple-darwin*
Build: x86_64-apple-darwin*
The test gcc.dg/torture/pr79732.c fails on darwin with
/opt/gcc/_clean/gcc/testsuite/gcc.dg/torture/pr79732.c:3:5: error: only weak
aliases are supported in this configuration
int bar () __attribute__ ((alias ("foo")));
^~~
This can be fixed with the following patch
--- ../_clean/gcc/testsuite/gcc.dg/torture/pr79732.c 2017-02-28
18:16:34.000000000 +0100
+++ gcc/testsuite/gcc.dg/torture/pr79732.c 2017-03-07 23:09:44.000000000
+0100
@@ -1,4 +1,6 @@
/* { dg-do link } */
+/* { dg-require-weak "" } */
+/* { dg-require-alias "" } */
int bar () __attribute__ ((alias ("foo")));
void foo () { }
>From gcc-bugs-return-558927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 15:18:15 2017
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Subject: [Bug libstdc++/80183] [7 Regression] Conditional jump or move depends on uninitialised value: std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)
Date: Sat, 25 Mar 2017 15:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80183
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-25
CC| |fdumont at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Started with r243379.
>From gcc-bugs-return-558928-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 16:00:36 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80181] [7 Regression] ICE in set_lattice_value, at tree-ssa-ccp.c:505
Date: Sat, 25 Mar 2017 16:00:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-25
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r242920.
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64715] [5/6/7 Regression] __builtin_object_size (..., 1) fails to locate subobject
Date: Sat, 25 Mar 2017 16:17:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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CC| |law at redhat dot com
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>From gcc-bugs-return-558930-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 16:19:39 2017
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/60818] ICE in validate_condition_mode on powerpc*-linux-gnu*
Date: Sat, 25 Mar 2017 16:19:00 -0000
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--- Comment #14 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I cannot get any of the testcases to fail with current trunk (but
they do fail with GCC 6). Combine always merges the compare into
the if_then_else pattern, and there are no such patterns in rs6000
(this could be done with a cmp+isel define_insn_and_split, and is
probably a good idea, but we do not have that currently).
>From gcc-bugs-return-558931-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 16:26:33 2017
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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/60818] ICE in validate_condition_mode on powerpc*-linux-gnu*
Date: Sat, 25 Mar 2017 16:26:00 -0000
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--- Comment #15 from Arseny Solokha <asolokha at gmx dot com> ---
(In reply to Segher Boessenkool from comment #14)
> I cannot get any of the testcases to fail with current trunk (but
> they do fail with GCC 6). Combine always merges the compare into
> the if_then_else pattern, and there are no such patterns in rs6000
> (this could be done with a cmp+isel define_insn_and_split, and is
> probably a good idea, but we do not have that currently).
OK, I'll post another one or two the next week. This is still reproducible on
the trunk, but the actual code pattern causing the ICE seems to be a moving
target.
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Subject: [Bug target/80180] Incorrect codegen from rdseed intrinsic use
Date: Sat, 25 Mar 2017 16:34:00 -0000
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--- Comment #1 from uros at gcc dot gnu.org ---
Author: uros
Date: Sat Mar 25 16:34:09 2017
New Revision: 246475
URL: https://gcc.gnu.org/viewcvs?rev=246475&root=gcc&view=rev
Log:
PR target/80180
* config/i386/i386.c (ix86_expand_builtin)
<IX86_BUILTIN_RDSEED{16,32,64}_STEP>: Do not expand arg0 between
flags reg setting and flags reg using instructions.
<IX86_BUILTIN_RDRAND{16,32,64}_STEP>: Ditto. Use non-flags reg
clobbering instructions to zero extend op2.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/79382] DTIO ICE
Date: Sat, 25 Mar 2017 17:38:00 -0000
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--- Comment #10 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sat Mar 25 17:38:17 2017
New Revision: 246476
URL: https://gcc.gnu.org/viewcvs?rev=246476&root=gcc&view=rev
Log:
2017-03-25 Paul Thomas <pault@gcc.gnu.org>
PR fortran/80156
PR fortran/79382
* decl.c (access_attr_decl): Remove the error for an absent
generic DTIO interface and ensure that symbol has the flavor
FL_PROCEDURE.
2017-03-25 Paul Thomas <pault@gcc.gnu.org>
PR fortran/80156
PR fortran/79382
* gfortran.dg/dtio_23.f90 : Remove the dg-error and add the
testcase for PR80156. Add a main programme that tests that
the typebound generic is accessible.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/dtio_23.f90
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Subject: [Bug fortran/80156] [7 Regression] Generic DTIO interface reported missing if public statement preceeds the interface block
Date: Sat, 25 Mar 2017 17:38:00 -0000
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--- Comment #8 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sat Mar 25 17:38:17 2017
New Revision: 246476
URL: https://gcc.gnu.org/viewcvs?rev=246476&root=gcc&view=rev
Log:
2017-03-25 Paul Thomas <pault@gcc.gnu.org>
PR fortran/80156
PR fortran/79382
* decl.c (access_attr_decl): Remove the error for an absent
generic DTIO interface and ensure that symbol has the flavor
FL_PROCEDURE.
2017-03-25 Paul Thomas <pault@gcc.gnu.org>
PR fortran/80156
PR fortran/79382
* gfortran.dg/dtio_23.f90 : Remove the dg-error and add the
testcase for PR80156. Add a main programme that tests that
the typebound generic is accessible.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/dtio_23.f90
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Subject: [Bug translation/80185] New: Message build from untranslated string concatenation in fortran/resolve.c
Date: Sat, 25 Mar 2017 18:11:00 -0000
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Bug ID: 80185
Summary: Message build from untranslated string concatenation
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Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: translation
Assignee: unassigned at gcc dot gnu.org
Reporter: fmarchal at perso dot be
Target Milestone: ---
In function resolve_fl_procedure() in fortran/resolve.conf, one can find this
code around line 12345 (nice line number BTW):
/* Check the result characteristics. */
if (!gfc_check_result_characteristics (sym, iface, errmsg, 200))
{
gfc_error ("%s between the MODULE PROCEDURE declaration "
"in module %s and the declaration at %L in "
"SUBMODULE %s", errmsg, module_name,
&sym->declared_at, submodule_name);
return false;
}
The first %s is an untranslated string such as "Type mismatch in function
result (%s/%s)" or "ALLOCATABLE attribute mismatch in " among other things.
That kind of construct is impossible to translate even if errmsg were
translated.
This is going to be a real mess to fix because
gfc_check_result_characteristics() is used at several places.
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Subject: [Bug target/80180] Incorrect codegen from rdseed intrinsic use
Date: Sat, 25 Mar 2017 18:11:00 -0000
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--- Comment #2 from uros at gcc dot gnu.org ---
Author: uros
Date: Sat Mar 25 18:10:37 2017
New Revision: 246477
URL: https://gcc.gnu.org/viewcvs?rev=246477&root=gcc&view=rev
Log:
PR target/80180
* config/i386/i386.c (ix86_expand_builtin)
<IX86_BUILTIN_RDSEED{16,32,64}_STEP>: Do not expand arg0 between
flags reg setting and flags reg using instructions.
<IX86_BUILTIN_RDRAND{16,32,64}_STEP>: Ditto. Use non-flags reg
clobbering instructions to zero extend op2.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/i386.c
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Subject: [Bug fortran/78881] [F03] reading from string with DTIO procedure does not work properly
Date: Sat, 25 Mar 2017 18:48:00 -0000
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--- Comment #13 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Sat Mar 25 18:48:01 2017
New Revision: 246478
URL: https://gcc.gnu.org/viewcvs?rev=246478&root=gcc&view=rev
Log:
2017-03-25 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/78881
* io/io.h (st_parameter_dt): Rename unused component last_char to
child_saved_iostat. Move comment to gfc_unit.
* io/list_read.c (list_formatted_read_scalar): After call to
child READ procedure, save the returned iostat value for later
check. (finish_list_read): Only finish READ if child_saved_iostat
was OK.
* io/transfer.c (read_sf_internal): If there is a saved character
in last character, seek back one. Add a new check for EOR
condition. (read_sf): If there is a saved character
in last character, seek back one. (formatted_transfer_scalar_read):
Initialize last character before invoking child procedure.
(data_transfer_init): If child dtio, set advance
status to nonadvancing. Move update of size and check for EOR
condition to before child dtio return.
* gfortran.dg/dtio_26.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/dtio_26.f03
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/io.h
trunk/libgfortran/io/list_read.c
trunk/libgfortran/io/transfer.c
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Subject: [Bug fortran/78881] [F03] reading from string with DTIO procedure does not work properly
Date: Sat, 25 Mar 2017 18:51:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #14 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Fixed on trunk, closing.
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Subject: [Bug target/80180] Incorrect codegen from rdseed intrinsic use
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--- Comment #3 from uros at gcc dot gnu.org ---
Author: uros
Date: Sat Mar 25 19:47:14 2017
New Revision: 246479
URL: https://gcc.gnu.org/viewcvs?rev=246479&root=gcc&view=rev
Log:
PR target/80180
* config/i386/i386.c (ix86_expand_builtin)
<IX86_BUILTIN_RDSEED{16,32,64}_STEP>: Do not expand arg0 between
flags reg setting and flags reg using instructions.
<IX86_BUILTIN_RDRAND{16,32,64}_STEP>: Ditto. Use non-flags reg
clobbering instructions to zero extend op2.
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/i386/i386.c
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From: "fmarchal at perso dot be" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/80055] do not mark internal compiler error messages for i18n
Date: Sat, 25 Mar 2017 19:47:00 -0000
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--- Comment #5 from Frederic Marchal <fmarchal at perso dot be> ---
(In reply to David Malcolm from comment #4)
> Would this prefix be for the benefit of the user, or for translator? (or
> both?)
>
> I believe that everywhere we're using internal_error, the diagnostics
> machinery will add "internal compiler error: " as a prefix when the message
> is emitted to the user, and I believe this prefix is translated.
The prefix was meant for the user.
Roland's suggestion was to reduce the translators workload by removing
technical messages from the translation as users aren't supposed to see them
and much less understand them.
My opinion was that it would be rude to display an untranslated message to the
user. But, to spare users some head scratching when faced with a message they
are not supposed to understand, I suggested to clearly identify such messages
as intended to the gcc development team.
If internal_error messages are already clearly identified as such, then all is
well from my point of view but you may want to argue about how unlikely it is
for a final user to ever see one internal_error.
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Subject: [Bug target/80180] Incorrect codegen from rdseed intrinsic use
Date: Sat, 25 Mar 2017 19:48:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com
Target Milestone|--- |5.5
--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed everywhere.
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Subject: [Bug fortran/49630] [OOP] ICE on obsolescent deferred-length type bound character function
Date: Sat, 25 Mar 2017 20:38:00 -0000
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--- Comment #14 from Vittorio Zecca <zeccav at gmail dot com> ---
(In reply to Dominique d'Humieres from comment #13)
> > I am still having an ICE as in comment 11.
>
> Me too even on trunk (7.0.1)!-(I also get an ICE with the original test.)
> Reopening the PR.
>
> > Opening a new bug.
>
> Did you do it?
No I did not open a new bug, because it already exists as 68045.
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Subject: [Bug c++/80186] New: ICE on C++ code with invalid constructor on x86_64-linux-gnu: Segmentation fault (program cc1plus)
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Bug ID: 80186
Summary: ICE on C++ code with invalid constructor on
x86_64-linux-gnu: Segmentation fault (program cc1plus)
Product: gcc
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This seems to affect at least all versions 4.6.x and later.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 7.0.1 20170325 (experimental) [trunk revision 246473] (GCC)
$
$ g++-trunk -c small.cpp
small.cpp: In instantiation of ‘struct A<int, int>’:
small.cpp:10:34: required from here
small.cpp:5:3: error: invalid constructor; you probably meant ‘A<int, int>
(const A<int, int>&)’
A (A < T, T >);
^
g++-trunk: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
$
----------------------------------------
template < class T, class > struct A
{
A ();
A (A &);
A (A < T, T >);
};
void f ()
{
A < int, int > (A < int, int >());
}
>From gcc-bugs-return-558944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 21:07:41 2017
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Subject: [Bug fortran/69498] ICE on disjunct cases with displaced or incomplete embedded statement
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koenigni at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |koenigni at gcc dot gnu.org,
| |pault at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |koenigni at gcc dot gnu.org
--- Comment #5 from koenigni at gcc dot gnu.org ---
Proposed fix for z2.f90 and z3.f90.
Index: symbol.c
===================================================================
--- symbol.c (Revision 246320)
+++ symbol.c (Arbeitskopie)
@@ -2782,10 +2782,20 @@ void
gfc_delete_symtree (gfc_symtree **root, const char *name)
{
gfc_symtree st, *st0;
+ const char *p;
- st0 = gfc_find_symtree (*root, name);
+ /* Submodules are marked as mod.submod. When freeing a submodule
+ symbol, the symtree only has "submod", so adjust that here. */
- st.name = gfc_get_string ("%s", name);
+ p = strchr(name, '.');
+ if (p)
+ p++;
+ else
+ p = name;
+
+ st0 = gfc_find_symtree (*root, p);
+
+ st.name = gfc_get_string ("%s", p);
gfc_delete_bbt (root, &st, compare_symtree);
free (st0);
>From gcc-bugs-return-558945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 21:08:58 2017
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Subject: [Bug libstdc++/80187] New: C++ variant should be trivially copy constructible if possible
Date: Sat, 25 Mar 2017 21:08:00 -0000
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Bug ID: 80187
Summary: C++ variant should be trivially copy constructible if
possible
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Presumably because std::variant<int,char> is not trivially copy constructible,
the ABI will be unable to pass it by value in a register in a call to a
non-inlined function taking the variant by value, but will have to pass it by
reference.
Test case:
#include <variant>
struct TaggedUnion { union { int i; char c; }; int tag; };
void f1(std::variant<int,char>);
void f2(TaggedUnion);
int main ()
{
f1(42);
f2({42, 0});
return 0;
}
Result on Linux x86-64: f1 is called passing the argument by address, f2 is
called passing by register.
See the standard proposal:
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0602r0.html
however I think this can be fixed in gcc regardless of when/whether the
proposal is accepted.
>From gcc-bugs-return-558946-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 21:13:37 2017
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From: "koenigni at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/69498] ICE on disjunct cases with displaced or incomplete embedded statement
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--- Comment #6 from koenigni at gcc dot gnu.org ---
> + p = strchr(name, '.');
s/strchr/strrchr
Also, regression tested for x86_64-pc-linux-gnu
>From gcc-bugs-return-558947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 22:34:58 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80182] gcc -lm -o
Date: Sat, 25 Mar 2017 22:34:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think the complaint is that -o foo.c overwrites foo.c (which has nothing to
do with -lm)
>From gcc-bugs-return-558948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 22:39:35 2017
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Subject: [Bug c/80182] gcc -lm -o
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Related to Bug 36312
>From gcc-bugs-return-558949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 22:46:40 2017
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/80188] New: calls.c: reason argument to maybe_complain_about_tail_call must be marked for translation
Date: Sat, 25 Mar 2017 22:46:00 -0000
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Bug ID: 80188
Summary: calls.c: reason argument to
maybe_complain_about_tail_call must be marked for
translation
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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from calls.c:
static void
maybe_complain_about_tail_call (tree call_expr, const char *reason)
{
...
error_at (EXPR_LOCATION (call_expr), "cannot tail-call: %s", reason);
}
The "reason" argument must be marked for translation using N_("..."), but is
not. For example:
maybe_complain_about_tail_call (exp,
"a callee-copied argument is"
" stored in the current "
" function's frame");
This means that the string "a callee-copied ..." is always given in English,
even if the rest of the diagnostic is given in German or some other language.
I don't know how to reproduce this particular diagnostic, but there should be a
test for it. When running this test in a non-English locale, the diagnostic
with mixed language will show up.
>From gcc-bugs-return-558950-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 23:13:36 2017
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/80189] New: gimplify.c: check whether parallel/task/teams should be translated
Date: Sat, 25 Mar 2017 23:13:00 -0000
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Bug ID: 80189
Summary: gimplify.c: check whether parallel/task/teams should
be translated
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from gimplify.c, function omp_default_clause:
const char *rtype;
if (ctx->region_type & ORT_PARALLEL)
rtype = "parallel";
else if (ctx->region_type & ORT_TASK)
rtype = "task";
else if (ctx->region_type & ORT_TEAMS)
rtype = "teams";
else
gcc_unreachable ();
error ("%qE not specified in enclosing %s",
DECL_NAME (lang_hooks.decls.omp_report_decl (decl)), rtype);
error_at (ctx->location, "enclosing %s", rtype);
Should "rtype" be translated here? If so, the string literals must be inlined
into the diagnostic since they result in different grammar, at least in German.
If they should not be translated, they should be marked in the code as
intentionally not translated, since this code looks like an oversight.
>From gcc-bugs-return-558951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 25 23:18:53 2017
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Subject: [Bug translation/80189] gimplify.c: check whether parallel/task/teams should be translated
Date: Sat, 25 Mar 2017 23:18:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
IIRC these are keywords for OpenMP.
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80190] New: darwin: untranslateable placeholder "non-ASCII character"
Date: Sat, 25 Mar 2017 23:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80190
Bug ID: 80190
Summary: darwin: untranslateable placeholder "non-ASCII
character"
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: roland.illig at gmx dot de
Target Milestone: ---
from config/darwin.c:
warning (darwin_warn_nonportable_cfstrings, "%s in CFString literal",
s[l] ? "non-ASCII character" : "embedded NUL");
When running GCC in a German locale, the placeholder %s will still be output in
English since it is not marked for translation. Both string literals must be
surrounded by _(...).
>From gcc-bugs-return-558953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 00:13:39 2017
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80191] New: diagnostic placeholder "new initializer" must be marked for translation
Date: Sun, 26 Mar 2017 00:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80191
Bug ID: 80191
Summary: diagnostic placeholder "new initializer" must be
marked for translation
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: roland.illig at gmx dot de
Target Milestone: ---
from cp/typeck.c:
permerror (input_location,
"%s expression list treated as compound expression",
msg);
The placeholder "msg" gets the value "new initializer" in init.c, but that
string literal is not enclosed in _(...), therefore it won't be translated.
That call seems to be the only place where build_x_compound_expr_from_vec is
actually called, so having a placeholder might be unnecessary overhead.
>From gcc-bugs-return-558954-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 00:26:35 2017
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug objc/80192] New: arguments to check_protocols should be marked as translateable
Date: Sun, 26 Mar 2017 00:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80192
Bug ID: 80192
Summary: arguments to check_protocols should be marked as
translateable
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: objc
Assignee: unassigned at gcc dot gnu.org
Reporter: roland.illig at gmx dot de
Target Milestone: ---
from objc-act.c:
warning (0, "%s %qE does not fully implement the %qE protocol",
type, name, PROTOCOL_NAME (p));
The placeholder %s either gets the string "class" or "category". These words
should be marked for translation by surrounding them with _(...).
>From gcc-bugs-return-558955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 00:27:47 2017
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/80193] New: ICE on valid (but hairy) C code at -O3 on x86_64-linux-gnu: in check_allocation, at ira.c:2563
Date: Sun, 26 Mar 2017 00:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80193
Bug ID: 80193
Summary: ICE on valid (but hairy) C code at -O3 on
x86_64-linux-gnu: in check_allocation, at ira.c:2563
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
This seems to be a recent regression and has been difficult to reduce further.
The code is complex, but valid nonetheless.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 7.0.1 20170325 (experimental) [trunk revision 246473] (GCC)
$
$ gcc-trunk -O2 small.c
$
$ gcc-trunk -O3 small.c
bad allocation for 386 and 522
small.c: In function ‘bf’:
small.c:187:1: internal compiler error: in check_allocation, at ira.c:2563
}
^
0xa4f86c check_allocation
../../gcc-source-trunk/gcc/ira.c:2563
0xa4f86c ira
../../gcc-source-trunk/gcc/ira.c:5374
0xa4f86c execute
../../gcc-source-trunk/gcc/ira.c:5592
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
---------------------------------------------------
int printf (const char *, ...);
char a, e, h, ag, ak, am, ar, ay, az, bc, bd, k, l;
int f, i, n, o, c, ac, ad, p, ah, s, aj, al, an, b, ao, aq, at, av, be, t, u,
g, q, r, ai, **aa, ap;
int d (int v)
{
return v + a;
}
int j (char v, char w)
{
return v - w;
}
void m (int p)
{
}
static void bf ()
{
int bg[240], bi, bk, bl, bj, bm = -1;
const int *bh;
if (h)
{
int bn, bo;
while (1)
{
int *bp = &at;
const int **bq = &bh, **br = bq;
while (av)
while (ah)
;
int bs = r, bt;
if (bt)
break;
bu:
for (; r; r = d (r))
{
*bp = j (q && b, 0);
if (n)
u = b;
if (u && ak)
p = 0;
}
if (c)
{
while (a)
while (r)
{
int bw = ar, bx = an;
by:
printf ("%d\n", an);
while (ao)
while (bw)
{
a = !g || f / g;
if (i)
az = i;
l = j (q && bh, 5);
if (n != 0)
t = l / n;
if (t)
while (bo)
;
}
while (a)
;
if (s)
while (bx)
while (1)
{
if (r)
break;
*aa || q;
}
while (at)
;
}
while (av)
if (b)
goto by;
while (bl)
while (1)
{
if (r)
break;
while (ag)
if (bi)
printf ("%d\n", 0);
if (bk)
{
bo = bn = bi = printf ("");
goto bz;
}
while (o)
if (a)
{
while (1)
;
ca:
;
}
if (ap)
while (1)
;
while (a)
{
if (ai)
{
bz:
while (be)
if (a)
while (bn)
bl = bg[am];
while (ac)
if (ad)
{
bj++;
while (bj)
if (c)
goto bu;
}
if (s)
{
while (ao)
while (f)
while (p)
if (e)
while (bj)
for (; bo;)
;
if (aq)
{
while (aj)
;
continue;
}
while (1)
;
}
while (!bj)
{
al = 0;
for (; al < 6; al++)
{
ai = 0;
for (; ai < 60; ai = d (ai))
{
k = !g || f / g;
if (i)
ay = 0;
bc = j (q && *bq, ay);
if (!n)
;
else
bd = bc / n;
if (**bq)
__builtin_abort ();
*bp = !aa;
}
while (av)
for (; ai; ai++)
for (; ar; ar++)
{
int cb;
*aa = &cb;
}
m ((long) &br);
while (an)
while (1)
;
}
}
}
o = b;
}
while (bs)
bm++;
while (bm)
;
}
}
}
goto ca;
}
}
int main ()
{
bf ();
return 0;
}
>From gcc-bugs-return-558956-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 01:55:10 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug objc/80192] arguments to check_protocols should be marked as translateable
Date: Sun, 26 Mar 2017 01:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80192
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is another keyword case IIRC.
>From gcc-bugs-return-558957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 03:02:38 2017
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From: "curlypaul924 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80194] New: ICE with local constant referenced by a lambda expression
Date: Sun, 26 Mar 2017 03:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80194
Bug ID: 80194
Summary: ICE with local constant referenced by a lambda
expression
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: curlypaul924 at gmail dot com
Target Milestone: ---
The following causes an ICE on g++ 5.4.0 and on the latest gcc-5-branch. It
does not ICE on 6.0 or later.
int fn1();
template <class Fn> void fn2(Fn &&fn) {
fn(42);
}
void fn2() {
auto const x = fn1();
fn2([&](auto) { x; });
}
Building with -std=c++14, the output is:
test.cpp: In instantiation of ‘fn2()::<lambda(auto:1)> [with auto:1 = int]’:
test.cpp:4:5: required from ‘void fn2(Fn&&) [with Fn =
fn2()::<lambda(auto:1)>]’
test.cpp:9:23: required from here
test.cpp:9:19: internal compiler error: Segmentation fault
fn2([&](auto) { x; });
^
0xaab7ff crash_signal
../.././gcc/toplev.c:383
0x70ac4c maybe_constant_init(tree_node*, tree_node*)
../.././gcc/cp/constexpr.c:4097
0x6320bf tsubst_copy
../.././gcc/cp/pt.c:13180
0x622c68 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../.././gcc/cp/pt.c:15797
0x62b392 tsubst_expr
../.././gcc/cp/pt.c:14606
0x62a4f6 tsubst_expr
../.././gcc/cp/pt.c:14017
0x62b2dc tsubst_expr
../.././gcc/cp/pt.c:14189
0x62b2dc tsubst_expr
../.././gcc/cp/pt.c:14189
0x62a09d instantiate_decl(tree_node*, int, bool)
../.././gcc/cp/pt.c:20675
0x6597d2 mark_used(tree_node*, int)
../.././gcc/cp/decl2.c:5122
0x5f889b build_over_call
../.././gcc/cp/call.c:7545
0x5fafd1 build_op_call_1
../.././gcc/cp/call.c:4347
0x5fafd1 build_op_call(tree_node*, vec<tree_node*, va_gc, vl_embed>**, int)
../.././gcc/cp/call.c:4370
0x6c3118 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
../.././gcc/cp/semantics.c:2426
0x624d46 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../.././gcc/cp/pt.c:15434
0x62b392 tsubst_expr
../.././gcc/cp/pt.c:14606
0x62a4f6 tsubst_expr
../.././gcc/cp/pt.c:14017
0x62b2dc tsubst_expr
../.././gcc/cp/pt.c:14189
0x62a09d instantiate_decl(tree_node*, int, bool)
../.././gcc/cp/pt.c:20675
0x63edeb instantiate_pending_templates(int)
../.././gcc/cp/pt.c:20792
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.
Output of g++ -v:
Using built-in specs.
COLLECT_GCC=/home/pbrannan/opt/gcc-5-branch/bin/g++
COLLECT_LTO_WRAPPER=/home/pbrannan/opt/gcc-5-branch/libexec/gcc/x86_64-unknown-linux-gnu/5.4.1/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ./configure --disable-multilib
--prefix=/home/pbrannan/opt/gcc-5-branch : (reconfigured) ./configure
--disable-multilib --prefix=/home/pbrannan/opt/gcc-5-branch
--enable-languages=c,c++,fortran,java,lto,objc --no-create --no-recursion
Thread model: posix
gcc version 5.4.1 20170326 (GCC)
>From gcc-bugs-return-558958-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 04:00:36 2017
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Subject: [Bug fortran/78670] [F03] Incorrect file position with namelist read under DTIO
Date: Sun, 26 Mar 2017 04:00:00 -0000
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--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
With latest patches on trunk, I get this:
$ ./a.out
Got ' '
Got '='
At line 72 of file pr78670.f03
Fortran runtime error: End of file
A minor problem with the test case is
IF (ch /= '') THEN
should be
IF (ch /= ' ') THEN
Still investigating.
>From gcc-bugs-return-558959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 09:07:05 2017
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Subject: [Bug libstdc++/80183] [7 Regression] Conditional jump or move depends on uninitialised value: std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)
Date: Sun, 26 Mar 2017 09:07:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
The problem is here libstdc++-v3/include/bits/stl_tree.h:
179 #if __cplusplus >= 201103L
180 _Rb_tree_header(_Rb_tree_header&& __x) noexcept
181 {
182 if (__x._M_header._M_parent != nullptr)
183 _M_move_data(__x);
184 else
185 {
186 _M_header._M_color = _S_red;
187 _M_reset();
188 }
189 }
190 #endif
191
192 void
193 _M_move_data(_Rb_tree_header& __from)
194 {
195 _M_header._M_parent = __from._M_header._M_parent;
196 _M_header._M_left = __from._M_header._M_left;
197 _M_header._M_right = __from._M_header._M_right;
198 _M_header._M_parent->_M_parent = &_M_header;
199 _M_node_count = __from._M_node_count;
200
201 __from._M_reset();
202 }
203
204 void
205 _M_reset()
206 {
207 _M_header._M_parent = 0;
208 _M_header._M_left = &_M_header;
209 _M_header._M_right = &_M_header;
210 _M_node_count = 0;
211 }
212 };
on line 183 _M_move_data(__x) doesn't set _M_header._M_color to any value.
So either hard set it to _S_red or augment _M_move_data to copy the color.
>From gcc-bugs-return-558960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 10:13:23 2017
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Subject: [Bug translation/80195] New: Message build from untranslated string concatenation in fortran/resolve.c:14529
Date: Sun, 26 Mar 2017 10:13:00 -0000
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Bug ID: 80195
Summary: Message build from untranslated string concatenation
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In fortran/resolve.c at line 14529:
if (sym->ts.type == BT_DERIVED
&& sym->ns->proc_name && sym->ns->proc_name->attr.flavor == FL_MODULE
&& !sym->ts.u.derived->attr.use_assoc
&& gfc_check_symbol_access (sym)
&& !gfc_check_symbol_access (sym->ts.u.derived)
&& !gfc_notify_std (GFC_STD_F2003, "PUBLIC %s %qs at %L of PRIVATE "
"derived type %qs",
(sym->attr.flavor == FL_PARAMETER)
? "parameter" : "variable",
sym->name, &sym->declared_at,
sym->ts.u.derived->name))
return;
The first %s is replaced with one of the untranslated strings literal
"parameter" or "variable".
That message can't be translated because it is constructed by concatenating
strings fragments.
>From gcc-bugs-return-558961-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 10:29:25 2017
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Subject: [Bug translation/80189] gimplify.c: check whether parallel/task/teams should be translated
Date: Sun, 26 Mar 2017 10:29:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yeah, these are all keywords. Perhaps we should use %qs instead of %s in both
strings though.
>From gcc-bugs-return-558962-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 11:34:38 2017
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From: "roman.morokutti at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80196] New: fenv_t not declared
Date: Sun, 26 Mar 2017 11:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80196
Bug ID: 80196
Summary: fenv_t not declared
Product: gcc
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Hello,
with the current Subversion tree I get the following error while building
libstdc++-v3:
In file included from
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:41:0,
from
/home/roman/gcc-source/libstdc++-v3/include/precompiled/stdc++.h:53:
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:58:11:
error: ‘::fenv_t’ has not been declared
using ::fenv_t;
^~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:59:11:
error: ‘::fexcept_t’ has not been declared
using ::fexcept_t;
^~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:62:11:
error: ‘::feclearexcept’ has not been declared
using ::feclearexcept;
^~~~~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:63:11:
error: ‘::fegetexceptflag’ has not been declared
using ::fegetexceptflag;
^~~~~~~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:64:11:
error: ‘::feraiseexcept’ has not been declared
using ::feraiseexcept;
^~~~~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:65:11:
error: ‘::fesetexceptflag’ has not been declared
using ::fesetexceptflag;
^~~~~~~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:66:11:
error: ‘::fetestexcept’ has not been declared
using ::fetestexcept;
^~~~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:68:11:
error: ‘::fegetround’ has not been declared
using ::fegetround;
^~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:69:11:
error: ‘::fesetround’ has not been declared
using ::fesetround;
^~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:71:11:
error: ‘::fegetenv’ has not been declared
using ::fegetenv;
^~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:72:11:
error: ‘::feholdexcept’ has not been declared
using ::feholdexcept;
^~~~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:73:11:
error: ‘::fesetenv’ has not been declared
using ::fesetenv;
^~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/fenv.h:74:11:
error: ‘::feupdateenv’ has not been declared
using ::feupdateenv;
^~~~~~~~~~~
In file included from
/home/roman/gcc-source/libstdc++-v3/include/precompiled/stdc++.h:53:0:
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:61:11:
error:::fenv_t’ has not been declared
using ::fenv_t;
^~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:62:11:
error:::fexcept_t’ has not been declared
using ::fexcept_t;
^~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:65:11:
error:::feclearexcept’ has not been declared
using ::feclearexcept;
^~~~~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:66:11:
error:::fegetexceptflag’ has not been declared
using ::fegetexceptflag;
^~~~~~~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:67:11:
error:::feraiseexcept’ has not been declared
using ::feraiseexcept;
^~~~~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:68:11:
error:::fesetexceptflag’ has not been declared
using ::fesetexceptflag;
^~~~~~~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:69:11:
error:::fetestexcept’ has not been declared
using ::fetestexcept;
^~~~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:71:11:
error:::fegetround’ has not been declared
using ::fegetround;
^~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:72:11:
error:::fesetround’ has not been declared
using ::fesetround;
^~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:74:11:
error:::fegetenv’ has not been declared
using ::fegetenv;
^~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:75:11:
error:::feholdexcept’ has not been declared
using ::feholdexcept;
^~~~~~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:76:11:
error:::fesetenv’ has not been declared
using ::fesetenv;
^~~~~~~~
/var/tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/cfenv:77:11:
error:::feupdateenv’ has not been declared
using ::feupdateenv;
^~~~~~~~~~~
Makefile:1736: recipe for target
'x86_64-pc-linux-gnu/bits/stdc++.h.gch/O2ggnu++0x.gch' failed
Could you please fix this error.
Best regards,
Roman
>From gcc-bugs-return-558963-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 11:36:19 2017
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Subject: [Bug libstdc++/80196] fenv_t not declared
Date: Sun, 26 Mar 2017 11:36:00 -0000
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--- Comment #1 from Roman <roman.morokutti at googlemail dot com> ---
I configured the build as follows:
/home/roman/gcc-source/configure
Best regards,
Roman
>From gcc-bugs-return-558964-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 11:37:44 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80196] fenv_t not declared
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--- Comment #2 from Roman <roman.morokutti at googlemail dot com> ---
Revision 246482.
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Subject: [Bug libstdc++/80183] [7 Regression] Conditional jump or move depends on uninitialised value: std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)
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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> ---
I think this is my fault, I asked François to remove a store to _M_color that I
thought was redundant.
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Subject: [Bug c++/80191] diagnostic placeholder "new initializer" must be marked for translation
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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CC| |jason at gcc dot gnu.org
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
"new-initializer" is a grammar term in the C++ standard, so maybe it shouldn't
be translated.
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Subject: [Bug libstdc++/80183] [7 Regression] Conditional jump or move depends on uninitialised value: std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)
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--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Author: trippels
Date: Sun Mar 26 12:33:35 2017
New Revision: 246483
URL: https://gcc.gnu.org/viewcvs?rev=246483&root=gcc&view=rev
Log:
Fix PR80183 : _M_color not moved
PR libstdc++/80183
* include/bits/stl_tree.h:
(_Rb_tree_header::_M_move_data(_Rb_tree_header&)): Also save _M_color.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/stl_tree.h
>From gcc-bugs-return-558969-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 12:35:40 2017
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Subject: [Bug libstdc++/80183] [7 Regression] Conditional jump or move depends on uninitialised value: std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-558968-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 12:35:09 2017
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Subject: [Bug libstdc++/80196] fenv_t not declared
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Maybe PR 40974 again, which nobody can reproduce as it only happens due to some
system-specific weirdness. We need more information about your system, what
kind of OS distro are you using? etc. etc.
Could you try adding --disable-libstdcxx-pch to the configure command?
>From gcc-bugs-return-558970-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 12:54:11 2017
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From: "roman.morokutti at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/80196] fenv_t not declared
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--- Comment #4 from Roman <roman.morokutti at googlemail dot com> ---
Thank you for your quick response.
I am using Gentoo. I'll give that option a try.
The build system is:
/usr/local/bin/gcc --version
gcc (GCC) 7.0.1 20170304 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
I'll report the result, when the build has finished, either by failure, or by
success, respectively.
Best regards,
Roman
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Subject: [Bug c++/80191] diagnostic placeholder "new initializer" must be marked for translation
Date: Sun, 26 Mar 2017 13:27:00 -0000
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--- Comment #2 from Roland Illig <roland.illig at gmx dot de> ---
But then shouldn't it be spelled "new-initializer", not "new initializer"?
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Subject: [Bug fortran/38822] Compile-time simplification of x**(real)
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--- Comment #19 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> AFAICS everthing is fixed here. Can we close this PR?
Without objection I'll proceed.
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Subject: [Bug rtl-optimization/80197] New: pgo dramatically pessimizes scimark2 MonteCarlo benchmark
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80197
Bug ID: 80197
Summary: pgo dramatically pessimizes scimark2 MonteCarlo
benchmark
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: vincenzo.innocente at cern dot ch
Target Milestone: ---
Created attachment 41053
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41053&action=edit
self contained benchmark of scimark2 MC
while chasing the regression I then found identified and solved in #79389
I discovered that pgo manages to do much worse than the regression above.
The symptom is the same: a huge increase in branch-miss.
This is not a regression: it is the same at least since gcc5.3
Attached a self contained single file, copy of scimark2 MC, and a couple of
scripts to compile and run it
just
tar -xzf fullMC.tgz
cd fullMC
# standard compilation -O2 -O3
./runit
# same with pgo passes
./dopgo
or just do
[innocent@vinavx3 fullMC]$ rm -rf pgo/* ; c++ -O3 fullMC.c -g
-fprofile-generate=pgo ; time ./a.out
1.848u 0.000s 0:01.85 99.4% 0+0k 0+8io 0pf+0w
[innocent@vinavx3 fullMC]$ c++ -O3 fullMC.c -g -fprofile-use=./pgo ; time
./a.out
0.967u 0.001s 0:00.96 100.0% 0+0k 0+0io 0pf+0w
[innocent@vinavx3 fullMC]$ c++ -O3 fullMC.c -g; time ./a.out
0.328u 0.000s 0:00.32 100.0% 0+0k 0+0io 0pf+0w
for reference:
cat dopgo
cat /proc/cpuinfo | grep name | head -n 1
gcc -v
rm -rf pgo/*;gcc -O2 fullMC.c -g -fprofile-generate=pgo; ./a.out
gcc -O2 fullMC.c -g -fprofile-use=pgo; ./a.out
perf stat -e task-clock -e cycles -e instructions -e branches -e branch-misses
./a.out
rm -rf pgo/*;gcc -O3 fullMC.c -g -fprofile-generate=pgo; ./a.out
gcc -O3 fullMC.c -g -fprofile-use=pgo; ./a.out
perf stat -e task-clock -e cycles -e instructions -e branches -e branch-misses
./a.out
on my machine the result is
# standard compilation
[innocent@vinavx3 fullMC]$ ./runit
model name : Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/afs/cern.ch/work/i/innocent/public/w5/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk//configure
--prefix=/afs/cern.ch/user/i/innocent/w5 -enable-languages=c,c++,lto,fortran
--enable-lto -enable-libitm -disable-multilib
Thread model: posix
gcc version 7.0.1 20170326 (experimental) [trunk revision 246482] (GCC)
gcc -O2 fullMC.c -g
real 0m0.489s
user 0m0.485s
sys 0m0.002s
Performance counter stats for './a.out':
486.303424 task-clock (msec) # 0.999 CPUs utilized
1901271534 cycles # 3.910 GHz
6403589598 instructions # 3.37 insn per cycle
700683389 branches # 1440.836 M/sec
13582 branch-misses # 0.00% of all branches
0.486571089 seconds time elapsed
gcc -O3 fullMC.c -g
real 0m0.330s
user 0m0.330s
sys 0m0.000s
Performance counter stats for './a.out':
327.385696 task-clock (msec) # 0.999 CPUs utilized
1279958668 cycles # 3.910 GHz
5009002909 instructions # 3.91 insn per cycle
306481761 branches # 936.149 M/sec
10805 branch-misses # 0.00% of all branches
0.327637485 seconds time elapsed
// pro generation and use (perf after use...)
[innocent@vinavx3 fullMC]$ ./dopgo
model name : Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/afs/cern.ch/work/i/innocent/public/w5/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk//configure
--prefix=/afs/cern.ch/user/i/innocent/w5 -enable-languages=c,c++,lto,fortran
--enable-lto -enable-libitm -disable-multilib
Thread model: posix
gcc version 7.0.1 20170326 (experimental) [trunk revision 246482] (GCC)
Performance counter stats for './a.out':
964.399833 task-clock (msec) # 1.000 CPUs utilized
3770455888 cycles # 3.910 GHz
5007987488 instructions # 1.33 insn per cycle
816525627 branches # 846.667 M/sec
88982233 branch-misses # 10.90% of all branches
0.964699603 seconds time elapsed
Performance counter stats for './a.out':
964.540691 task-clock (msec) # 1.000 CPUs utilized
3771010753 cycles # 3.910 GHz
5007957589 instructions # 1.33 insn per cycle
816522043 branches # 846.540 M/sec
88992086 branch-misses # 10.90% of all branches
0.964758684 seconds time elapsed
>From gcc-bugs-return-558974-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 14:39:10 2017
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From: "timshen at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80187] C++ variant should be trivially copy constructible if possible
Date: Sun, 26 Mar 2017 14:39:00 -0000
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Tim Shen <timshen at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-03-26
CC| |timshen at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |timshen at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Tim Shen <timshen at gcc dot gnu.org> ---
Assign to myself.
Implementation idea:
https://godbolt.org/g/ulh4V7
The idea is to avoid multiple-layer hierarchy that libc++ uses, while remains
easy to extend to fine-grained triviality (one for each of big five). It
requires more or less a rewrite of the storage part. It's not hard for now,
because we don't have ABI compatibility constraints.
>From gcc-bugs-return-558975-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 14:44:48 2017
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From: "jtaylor.debian at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80198] New: does not vectorize generic inplace integer operation
Date: Sun, 26 Mar 2017 14:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80198
Bug ID: 80198
Summary: does not vectorize generic inplace integer operation
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: jtaylor.debian at googlemail dot com
Target Milestone: ---
In the following code the generic function does not vectorize when provided
with arguments that do an inplace operation. GCC does emit vector code but the
code is only executed in out of place operations where |a - b| > 16.
This is despite the explicit hint to the compiler that the two pointers are the
same.
As the explicit inplace variant does execute the same vectorized code there
should be no issue with the method chosen and GCC should allow the inplace
operations to choose the vector path.
void __attribute__((noinline)) fun(int * a, int * b, int c)
{
int i;
if (a == b) {
for (i=0; i < 256; i++) {
a[i] = b[i] | c;
}
}
else {
for (i=0; i < 256; i++) {
a[i] = b[i] | c;
}
}
}
void __attribute__((noinline)) inplace(int * a, int c)
{
int i;
for (i=0; i < 256; i++) {
a[i] = a[i] | c;
}
}
int main()
{
int a[256];
generic(a, a, 0);
inplace(a, 0);
}
$ gcc -v
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 6.2.0-5ubuntu12'
--with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-6 --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 --disable-browser-plugin --enable-java-awt=gtk
--enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-amd64/jre
--enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-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 6.2.0 20161005 (Ubuntu 6.2.0-5ubuntu12)
$ gcc test.c -ftree-vectorize -g -O2
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Subject: [Bug fortran/53542] Diagnostic of USE-associated variables shows original instead of renamed symbol name
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
From comment 0, obvious patch
--- ../_clean/gcc/fortran/expr.c 2017-03-22 17:29:45.000000000 +0100
+++ gcc/fortran/expr.c 2017-03-26 16:12:21.000000000 +0200
@@ -2591,7 +2591,7 @@ gfc_check_init_expr (gfc_expr *e)
else
gfc_error ("Parameter %qs at %L has not been declared or is "
"a variable, which does not reduce to a constant "
- "expression", e->symtree->n.sym->name, &e->where);
+ "expression", e->symtree->name, &e->where);
break;
>From gcc-bugs-return-558977-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 15:32:35 2017
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Subject: [Bug tree-optimization/80198] regression, does not vectorize generic inplace integer operation
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Julian Taylor <jtaylor.debian at googlemail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|does not vectorize generic |regression, does not
|inplace integer operation |vectorize generic inplace
| |integer operation
--- Comment #1 from Julian Taylor <jtaylor.debian at googlemail dot com> ---
actually this seems to be a regression.
Compiled with gcc 4.6 it does chose the vectorized path for the inplace
function arguments.
>From gcc-bugs-return-558978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 16:36:15 2017
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Subject: [Bug fortran/79434] [submodules] separate module procedure breaks encapsulation
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Any plan to back port r245595 to 6.4? or should the PR closed as FIXED?
>From gcc-bugs-return-558979-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 17:05:26 2017
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Subject: [Bug c/80199] New: Wlogical-op inconsistent from int to float ?
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Bug ID: 80199
Summary: Wlogical-op inconsistent from int to float ?
Product: gcc
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For the following C++ code:
void g1( float );
void g2( int );
void
f1( float a)
{
if (a < 0.0 && a > 1.0)
g1( a);
}
void
f2( int a)
{
if (a < 0 && a > 1)
g2( a);
}
I get only one warning, not the expected two:
$ ~/gcc/results/bin/g++ -g -O2 -Wall -Wlogical-op -Wextra -c mar26e.cc
mar26e.cc: In function ‘void f2(int)’:
mar26e.cc:15:12: warning: logical ‘and’ of mutually exclusive tests is always
false [-Wlogical-op]
if (a < 0 && a > 1)
~~~~~~^~~~~~~~
$ ~/gcc/results/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/home/dcb/gcc/results/bin/g++
COLLECT_LTO_WRAPPER=/home/dcb/gcc/results.246474/libexec/gcc/x86_64-pc-linux-gnu/7.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../trunk/configure --prefix=/home/dcb/gcc/results.246474
--disable-bootstrap --disable-multilib --disable-werror
--enable-checking=df,extra,fold,rtl,yes --enable-languages=c,c++,fortran
Thread model: posix
gcc version 7.0.1 20170325 (experimental) (GCC)
$
>From gcc-bugs-return-558980-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 17:46:17 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/80184] FAIL: gcc.dg/torture/pr79732.c -O* (test for excess errors) on darwin
Date: Sun, 26 Mar 2017 17:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80184
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Fixed by revision r246485.
>From gcc-bugs-return-558981-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 18:09:09 2017
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From: "paul.richard.thomas at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/79434] [submodules] separate module procedure breaks encapsulation
Date: Sun, 26 Mar 2017 18:09:00 -0000
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--- Comment #4 from paul.richard.thomas at gmail dot com <paul.richard.thomas at gmail dot com> ---
Hi Dominiq,
As soon as I have a minute or two, I will back port it. My business is
taking me 7/7 at the moment.
Thanks for the reminder.
Paul
On 26 March 2017 at 17:36, dominiq at lps dot ens.fr
<gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79434
>
> Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|NEW |WAITING
>
> --- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Any plan to back port r245595 to 6.4? or should the PR closed as FIXED?
>
> --
> You are receiving this mail because:
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>From gcc-bugs-return-558982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 18:37:31 2017
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Subject: [Bug tree-optimization/80198] regression [6/7], does not vectorize generic inplace integer operation
Date: Sun, 26 Mar 2017 18:37:00 -0000
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Julian Taylor <jtaylor.debian at googlemail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|regression, does not |regression [6/7], does not
|vectorize generic inplace |vectorize generic inplace
|integer operation |integer operation
--- Comment #2 from Julian Taylor <jtaylor.debian at googlemail dot com> ---
the regression occurred in 07c0f1caa31079d8f4edd7ff4a06656e2a4441c5 svn 233207
current trunk/master is still affected
>From gcc-bugs-return-558983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 18:42:54 2017
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Subject: [Bug tree-optimization/80198] regression [6/7], does not vectorize generic inplace integer operation
Date: Sun, 26 Mar 2017 18:42:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
r233207
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Subject: [Bug tree-optimization/65917] [6 Regression] XFAIL: gcc.dg/tree-ssa/20030922-2.c scan-tree-dump-times dom1 "if " 2
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Julian Taylor <jtaylor.debian at googlemail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jtaylor.debian at googlemail dot c
| |om
--- Comment #12 from Julian Taylor <jtaylor.debian at googlemail dot com> ---
this fixed appears to have caused this performance regression:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80198
>From gcc-bugs-return-558985-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 18:48:49 2017
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From: "roman.morokutti at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80200] New: decNumber.c : error : #include_next is a GCC extension
Date: Sun, 26 Mar 2017 18:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80200
Bug ID: 80200
Summary: decNumber.c : error : #include_next is a GCC extension
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: roman.morokutti at googlemail dot com
Target Milestone: ---
Hello,
while building the Subversion tree (Revision 246482) the following error
occurs:
In file included from /home/roman/gcc-source/libdecnumber/decNumber.c:175:0:
/usr/local/include/c++/7.0.0/stdlib.h:30:3: error: #include_next is a GCC
extension [-Werror]
# include_next <stdlib.h>
^~~~~~~~~~~~
In file included from
/home/roman/gcc-source/libdecnumber/decNumberLocal.h:40:0,
from /home/roman/gcc-source/libdecnumber/decNumber.c:181:
/usr/local/include/c++/7.0.0/stdlib.h:30:3: error: #include_next is a GCC
extension [-Werror]
# include_next <stdlib.h>
^~~~~~~~~~~~
cc1: all warnings being treated as errors
Makefile:193: recipe for target 'decNumber.o' failed.
Operating System: Gentoo
Build System:
/usr/local/bin/gcc --version
gcc (GCC) 7.0.1 20170304 (experimental)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Configure:
/home/roman/gcc-source/configure --disable-libstdcxx-pch
Please resolve this bug.
Thank you in advance.
Best regards,
Roman
>From gcc-bugs-return-558986-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 18:50:04 2017
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From: "roman.morokutti at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80196] fenv_t not declared
Date: Sun, 26 Mar 2017 18:50:00 -0000
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Roman <roman.morokutti at googlemail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WORKSFORME
--- Comment #5 from Roman <roman.morokutti at googlemail dot com> ---
Thank you, Jonathan.
Disable the pre compiled header for libstdc++-v3,
did solve the problem. However, a new one occured
for which I filed a new bug (80200).
Best regards,
Roman
>From gcc-bugs-return-558987-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 19:02:56 2017
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Subject: [Bug c/80201] New: groff build fails with -floop-nest-optimize -fgraphite-identity
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Bug ID: 80201
Summary: groff build fails with -floop-nest-optimize
-fgraphite-identity
Product: gcc
Version: 6.3.0
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Created attachment 41054
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41054&action=edit
getopt.c preprocessed source
When building groff-1.22.2 (Gentoo) on GCC 6.3.0, I receive the following
error:
i686-pc-linux-gnu-gcc -I. -I.
-I/var/tmp/portage/sys-apps/groff-1.22.2/work/groff-1.22.2/src/include
-I/var/tmp/portage/sys-apps/groff-1.22.2/work/groff-1.22.2/src/include
-I/var/tmp/portage/sys-apps/groff-1.22.2/work/groff-1.22.2/src/libs/gnulib/lib
-DHAVE_CONFIG_H -O2 -pipe -floop-nest-optimize -fgraphite-identity
-march=native -c -D__GETOPT_PREFIX=groff_ -DENABLE_RELOCATABLE=1
-DLIBDIR=\"/usr/lib\" getopt.c
getopt.c: In function 'exchange':
getopt.c:171:1: internal compiler error: in add_loop_constraints, at
graphite-sese-to-poly.c:933
exchange (char **argv, struct _getopt_data *d)
^~~~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.gentoo.org/> for instructions.
GCC specs are as follows:
Using built-in specs.
COLLECT_GCC=/usr/i686-pc-linux-gnu/gcc-bin/6.3.0/i686-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/i686-pc-linux-gnu/6.3.0/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: /var/tmp/portage/sys-devel/gcc-6.3.0/work/gcc-6.3.0/configure
--host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --prefix=/usr
--bindir=/usr/i686-pc-linux-gnu/gcc-bin/6.3.0
--includedir=/usr/lib/gcc/i686-pc-linux-gnu/6.3.0/include
--datadir=/usr/share/gcc-data/i686-pc-linux-gnu/6.3.0
--mandir=/usr/share/gcc-data/i686-pc-linux-gnu/6.3.0/man
--infodir=/usr/share/gcc-data/i686-pc-linux-gnu/6.3.0/info
--with-gxx-include-dir=/usr/lib/gcc/i686-pc-linux-gnu/6.3.0/include/g++-v6
--with-python-dir=/share/gcc-data/i686-pc-linux-gnu/6.3.0/python
--enable-languages=c,c++ --enable-obsolete --enable-secureplt --disable-werror
--with-system-zlib --enable-nls --without-included-gettext
--enable-checking=release --with-bugurl=https://bugs.gentoo.org/
--with-pkgversion='Gentoo Hardened 6.3.0 p1.0' --enable-esp
--enable-libstdcxx-time --disable-libstdcxx-pch --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--disable-multilib --disable-altivec --disable-fixed-point --with-arch=i686
--enable-targets=all --disable-libgcj --enable-libgomp --disable-libmudflap
--disable-libssp --disable-libcilkrts --disable-libmpx --enable-vtable-verify
--enable-libvtv --disable-libquadmath --enable-lto --with-isl
--disable-isl-version-check --disable-libsanitizer --disable-default-pie
--enable-default-ssp
Thread model: posix
gcc version 6.3.0 (Gentoo Hardened 6.3.0 p1.0)
>From gcc-bugs-return-558988-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 19:14:56 2017
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From: "mchtly at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80202] New: Spurious warning "array subscript is below array bounds" with if-statement and char to unsigned int conversion
Date: Sun, 26 Mar 2017 19:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80202
Bug ID: 80202
Summary: Spurious warning "array subscript is below array
bounds" with if-statement and char to unsigned int
conversion
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mchtly at gmail dot com
Target Milestone: ---
When compiling the following example with "g++ -Warray-bounds -O2", I get
spurious warnings:
// This type doesn't matter.
#define T int
T ac[2]; // No warning if this is static.
void foo(T); // No warning if this is defined.
enum {
ACM0 = 1, // This value must be greater than zero.
ACM1 // This value may be any non-negative integer.
};
// The parameter to srs() must be unsigned, the parameter to read()
// must be signed, and the first must be smaller than the second.
static_assert(sizeof(unsigned char) < sizeof(int), "");
T read(int reg) {
switch (reg) {
// No warning if either case statement is removed. Additional cases
// may be added anywhere.
case ACM0:
case ACM1:
return ac[reg - ACM0];
// The default case statement may be removed, and is only included
// for completeness.
default:
return 0;
}
}
void srs(unsigned char reg) {
if (reg < ACM0)
// Warning only if the return value of read() is passed to foo()
// at some point.
foo(read(reg));
}
And the output from GCC is:
$ g++ -c test.cpp -Warray-bounds -O2
test.cpp: In function 'void srs(unsigned char)':
test.cpp:22:25: warning: array subscript is below array bounds [-Warray-bounds]
return ac[reg - ACM0];
~~~~~~~~~~~~~^
>From gcc-bugs-return-558989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 19:27:22 2017
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From: "fdumont at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80183] [7 Regression] Conditional jump or move depends on uninitialised value: std::local_Rb_tree_decrement(std::_Rb_tree_node_base*) (tree.cc:97)
Date: Sun, 26 Mar 2017 19:27:00 -0000
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--- Comment #7 from François Dumont <fdumont at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> I think this is my fault, I asked François to remove a store to _M_color
> that I thought was redundant.
I was surprised that _M_color wasn't move along with other members, with your
patch it is now.
However to strictly restore previous behavior you could have only set _M_color
to red in the move constructor whether _M_move_data or _M_reset was called. But
I prefer current code of course.
>From gcc-bugs-return-558990-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 19:47:42 2017
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Subject: [Bug translation/80189] gimplify.c: check whether parallel/task/teams should be translated
Date: Sun, 26 Mar 2017 19:47:00 -0000
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--- Comment #3 from Roland Illig <roland.illig at gmx dot de> ---
To me that would be fine since then I had not even looked at what the %qs might
be. But like the code is now, I suspected the %s to be part of the grammar of
the diagnostic.
>From gcc-bugs-return-558991-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 20:01:44 2017
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Subject: [Bug fortran/79434] [submodules] separate module procedure breaks encapsulation
Date: Sun, 26 Mar 2017 20:01:00 -0000
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--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sun Mar 26 20:01:07 2017
New Revision: 246486
URL: https://gcc.gnu.org/viewcvs?rev=246486&root=gcc&view=rev
Log:
2017-03-26 Paul Thomas <pault@gcc.gnu.org>
PR fortran/79434
* parse.c (check_component, parse_union): Whitespace.
(set_syms_host_assoc): For a derived type, check if the module
in which it was declared is one of the submodule ancestors. If
it is, make the components public. Otherwise, reset attribute
'host_assoc' and set 'use-assoc' so that encapsulation is
preserved.
2017-03-26 Paul Thomas <pault@gcc.gnu.org>
PR fortran/79434
* gfortran.dg/submodule_25.f08 : New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/submodule_25.f08
Modified:
branches/gcc-6-branch/gcc/fortran/ChangeLog
branches/gcc-6-branch/gcc/fortran/parse.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-558992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 20:02:40 2017
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Subject: [Bug fortran/79434] [submodules] separate module procedure breaks encapsulation
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk and 6-branch.
Thanks for the report.
Paul
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From: "jeremyhu at macports dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/80203] New: libiberty fails to compile regex.c correctly when gcc is configured --with-sysroot
Date: Sun, 26 Mar 2017 20:04:00 -0000
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Bug ID: 80203
Summary: libiberty fails to compile regex.c correctly when gcc
is configured --with-sysroot
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: jeremyhu at macports dot org
Target Milestone: ---
During a build of gcc6, libiberty fails to compile because -isysroot is not
passed to the compiler. gcc was configured with
--with-sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk",
and this is passed elsewhere, but not when building regex.c
/opt/local/bin/clang-mp-3.9 -arch x86_64 -c -DHAVE_CONFIG_H -pipe -Os
-isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk
-I.
-I/opt/local/var/macports/build/_Users_jeremy_src_macports_macports-ports_lang_gcc6/libgcc/work/gcc-6.3.0/libiberty/../include
-W -Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -pedantic
-D_GNU_SOURCE
/opt/local/var/macports/build/_Users_jeremy_src_macports_macports-ports_lang_gcc6/libgcc/work/gcc-6.3.0/libiberty/physmem.c
...
if [ x"-fno-common" != x ]; then \
/opt/local/bin/clang-mp-3.9 -arch x86_64 -c -DHAVE_CONFIG_H -g -I.
-I/opt/local/var/macports/build/_Users_jeremy_src_macports_macports-ports_lang_gcc6/libgcc/work/gcc-6.3.0/libiberty/../include
-W -Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -pedantic
-D_GNU_SOURCE -fno-common
/opt/local/var/macports/build/_Users_jeremy_src_macports_macports-ports_lang_gcc6/libgcc/work/gcc-6.3.0/libiberty/regex.c
-o pic/regex.o; \
else true; fi
/opt/local/var/macports/build/_Users_jeremy_src_macports_macports-ports_lang_gcc6/libgcc/work/gcc-6.3.0/libiberty/regex.c:52:12:
fatal error: 'sys/types.h' file not found
# include <sys/types.h>
^
1 error generated.
gcc was configured with:
--prefix=/opt/local --build=x86_64-apple-darwin16
--enable-languages=c,c++,objc,obj-c++,lto,fortran
--includedir=/opt/local/include/gcc6 --infodir=/opt/local/share/info
--mandir=/opt/local/share/man --datarootdir=/opt/local/share/gcc-6
--with-local-prefix=/opt/local --with-system-zlib --disable-nls
--program-suffix=-mp-6 --with-gxx-include-dir=/opt/local/include/gcc6/c++/
--with-gmp=/opt/local --with-mpfr=/opt/local --with-mpc=/opt/local
--with-isl=/opt/local --enable-stage1-checking --disable-multilib --enable-lto
--enable-libstdcxx-time --with-build-config=bootstrap-debug
--with-as=/opt/local/bin/as --with-ld=/opt/local/bin/ld
--with-ar=/opt/local/bin/ar --with-bugurl=https://trac.macports.org/newticket
--libdir=/opt/local/lib/libgcc --with-pkgversion="MacPorts gcc6 6.3.0_0"
--with-sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk"
Note that we're not using --with-build-sysroot because of
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79885
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/78670] [F03] Incorrect file position with namelist read under DTIO
Date: Sun, 26 Mar 2017 20:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78670
Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |janus at gcc dot gnu.org
Depends on| |78661
--- Comment #4 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Janus, the fix for this bug depends on your patch for pr78661. I would like to
incorporate yours into the solution to this PR if ok with you.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78661
[Bug 78661] [OOP] Namelist output missing object designator under DTIO
>From gcc-bugs-return-558995-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 21:00:45 2017
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From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80204] New: macosx-version-min wrong for macOS Sierra 10.12.3
Date: Sun, 26 Mar 2017 21:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80204
Bug ID: 80204
Summary: macosx-version-min wrong for macOS Sierra 10.12.3
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: simon at pushface dot org
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Host: x86_64-apple-darwin
In gcc/config/darwin-driver.c, darwin_find_version_from_kernel() assumes
that the minor version in the Darwin kernel version (16.4.0, => minor
version 4) is equal to the bugfix component of the macOS version, so that
the compiler receives -mmacosx-version-min=10.12.4 and the linker receives
-macosx_version_min 10.12.4.
Unfortunately, Apple don’t apply this algorithm; the macOS version is
actually 10.12.3.
Getting this wrong means that it’s impossible to run an executable from
within a bundle: Sierra complains "You have macOS 10.12.3. The application
requires macOS 10.12.4 or later".
A workround would perhaps be to link the executable with
-Wl,-macosx_version_min,`sw_vers -productVersion` (I assume that it’s only
the linker phase that matters?)
There are several suggestions at e.g. http://stackoverflow.com/q/11072804/40851
which are perhaps unsatisfactory because of using objective-C. Perhaps we
could set up an environment variable during configure, using sw_vers as
above?
As an alternative, I see that Apple’s gcc (Apple LLVM version 8.0.0
(clang-800.0.42.1)) specifies - only at link time -
-macosx_version_min 10.12.0
Maybe we don’t need to include a specific bugfix component at all? That
would make life a lot easier!
>From gcc-bugs-return-558996-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 21:45:05 2017
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80191] diagnostic placeholder "new initializer" must be marked for translation
Date: Sun, 26 Mar 2017 21:45:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
I wonder if it would be worthwhile to add format specifier to the pretty
printer for terms of the grammar (say %T or something). That would make it
possible to a) clearly distinguish them from plain English text that must be
translated and perhaps also help diagnose unquoted %s arguments via -Wformat,
and b) format them in a distinct font (such as italics or terminals that
support it, as for instance Gnome terminal does).
>From gcc-bugs-return-558997-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 26 22:27:11 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80199] Wlogical-op inconsistent from int to float ?
Date: Sun, 26 Mar 2017 22:27:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-26
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The implementation of the warning relies on the make_range function which in,
in turn, calls make_range_step. As the comment indicates copied below,
make_range_step has no support for floating point values and so it doesn't
simplify the comparison involving floating point expressions the same way it
does one with integers. This in turn prevents the warn_logical_operator
function that implements the warning from detecting that the result is always
false.
It seems this should be doable in the constant propagation pass that is able to
figure this out for floats. I'll confirm it on that basis.
make_range_step (location_t loc, enum tree_code code, tree arg0, tree arg1,
tree exp_type, tree *p_low, tree *p_high, int *p_in_p,
bool *strict_overflow_p)
{
...
case EQ_EXPR: case NE_EXPR:
case LT_EXPR: case LE_EXPR: case GE_EXPR: case GT_EXPR:
/* We can only do something if the range is testing for zero
and if the second operand is an integer constant. Note that
saying something is "in" the range we make is done by
complementing IN_P since it will set in the initial case of
being not equal to zero; "out" is leaving it alone. */
if (low == NULL_TREE || high == NULL_TREE
>From gcc-bugs-return-558998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 00:33:05 2017
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Subject: [Bug fortran/38822] Compile-time simplification of x**(real)
Date: Mon, 27 Mar 2017 00:33:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #20 from kargl at gcc dot gnu.org ---
(In reply to janus from comment #18)
> AFAICS everthing is fixed here. Can we close this PR?
The bug is not fixed. Please see comment #2 and #3.
>From gcc-bugs-return-558999-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 00:34:15 2017
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/38822] Compile-time simplification of x**(real)
Date: Mon, 27 Mar 2017 00:34:00 -0000
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--- Comment #21 from kargl at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #19)
> > AFAICS everthing is fixed here. Can we close this PR?
>
> Without objection I'll proceed.
Should the bug be fixed before proceeding? See comment #2 and #3.
module funcs
implicit none
contains
recursive function initialization(x) result(f)
logical f
integer x
integer z(0*transfer(2.D0**2,1)+2)
save
z = 0
if(x > 0) then
z = 1
f = initialization(x-1)
end if
f = z(1) == 0
end function initialization
recursive function non_initialization(x) result(f)
logical f
integer x
integer z(0*transfer(2.D0**2.,1)+2)
save
z = 0
if(x > 0) then
z = 1
f = non_initialization(x-1)
end if
f = z(1) == 0
end function non_initialization
end module funcs
program exponent_test
use funcs
implicit none
write(*,*) initialization(1), non_initialization(1)
end program exponent_test
>From gcc-bugs-return-559000-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 07:13:59 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/80205] New: [5/6/7 Regression] ICE in walk_ssa_copies at ipa-polymorphic-call.c:835
Date: Mon, 27 Mar 2017 07:13:00 -0000
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Bug ID: 80205
Summary: [5/6/7 Regression] ICE in walk_ssa_copies at
ipa-polymorphic-call.c:835
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: ipa
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Reporter: marxin at gcc dot gnu.org
CC: hubicka at ucw dot cz
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Following test-case triggers ICE:
$ cat ice.ii
class a
{
public:
virtual ~a ();
};
class b
{
public:
template <typename c> b (c);
~b () { delete d; }
void
operator= (b e)
{
b (e).f (*this);
}
void
f (b &e)
{
a g;
d = e.d;
e.d = &g;
}
a *d;
};
void
h ()
{
b i = int();
void j ();
i = j;
}
$ g++ -fnon-call-exceptions --param early-inlining-insns=100 -O2
-fdevirtualize ice.ii -c -std=c++14
ice.ii: In function ‘void h()’:
ice.ii:31:1: internal compiler error: Segmentation fault
}
^
0xdf34df crash_signal
../../gcc/toplev.c:337
0x10a3b9d integer_zerop(tree_node const*)
../../gcc/tree.c:2324
0xbf9be1 walk_ssa_copies
../../gcc/ipa-polymorphic-call.c:835
0xbf9f34 ipa_polymorphic_call_context::ipa_polymorphic_call_context(tree_node*,
tree_node*, gimple*, tree_node**)
../../gcc/ipa-polymorphic-call.c:898
0xb6160a possible_polymorphic_call_targets(tree_node*, gimple*, bool*, void**)
../../gcc/ipa-utils.h:126
0xb5f868 gimple_fold_call
../../gcc/gimple-fold.c:3687
0xb5f868 fold_stmt_1
../../gcc/gimple-fold.c:4438
0xe690d6 fold_marked_statements
../../gcc/tree-inline.c:4946
0xe79134 optimize_inline_calls(tree_node*)
../../gcc/tree-inline.c:5026
0x1536681 early_inliner(function*)
../../gcc/ipa-inline.c:2721
It's caused by a PHI node created in:
#1 0x0000000000aa9fd4 in ggc_internal_alloc (size=<optimized out>,
f=<optimized out>, s=0, n=1) at ../../gcc/ggc-page.c:1390
#2 0x00000000010d60c1 in ggc_internal_alloc (s=248) at ../../gcc/ggc.h:134
#3 0x00000000010d685f in allocate_phi_node (len=4) at
../../gcc/tree-phinodes.c:117
#4 0x00000000010d6916 in make_phi_node (var=0x7ffff69ff3a8, len=0) at
../../gcc/tree-phinodes.c:174
#5 0x00000000010d6f04 in create_phi_node (var=0x7ffff69ff3a8,
bb=0x7ffff69f5d00) at ../../gcc/tree-phinodes.c:342
#6 0x000000000108d68d in copy_phis_for_bb (bb=0x7ffff69f5750,
id=0x7fffffffd550) at ../../gcc/tree-inline.c:2347
#7 0x000000000108ef4f in copy_cfg_body (id=0x7fffffffd550, count=0,
frequency_scale=10000, entry_block_map=0x7ffff686d3a8,
exit_block_map=0x7ffff69f5b60, new_entry=0x0) at ../../gcc/tree-inline.c:2796
#8 0x000000000108f7d0 in copy_body (id=0x7fffffffd550, count=0,
frequency_scale=10000, entry_block_map=0x7ffff686d3a8,
exit_block_map=0x7ffff69f5b60, new_entry=0x0) at ../../gcc/tree-inline.c:2982
#9 0x00000000010941a7 in expand_call_inline (bb=0x7ffff686d3a8,
stmt=0x7ffff69ea510, id=0x7fffffffd550) at ../../gcc/tree-inline.c:4725
#10 0x0000000001094a7b in gimple_expand_calls_inline (bb=0x7ffff686d3a8,
id=0x7fffffffd550) at ../../gcc/tree-inline.c:4870
#11 0x0000000001095002 in optimize_inline_calls (fn=0x7ffff69e6700) at
../../gcc/tree-inline.c:5010
#12 0x00000000018b5a62 in early_inliner (fun=0x7ffff69e0580) at
../../gcc/ipa-inline.c:2721
where the PHI looks as follows:
(gdb) p debug_gimple_stmt(phi)
SR.2_19 = PHI <>
$1 = void
I've got patch for that.
>From gcc-bugs-return-559001-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 07:25:01 2017
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Subject: [Bug target/80206] New: ICE in extract_insn, at recog.c:2327
Date: Mon, 27 Mar 2017 07:25:00 -0000
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Bug ID: 80206
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Starting from 4.9, where AVX512 was instroduced, we ICE:
$ cat /tmp/tmp6iytybcl.i
__attribute__ ((__vector_size__ (8 * sizeof (long)))) int a;
__attribute__ ((__vector_size__ (4 * sizeof (double)))) double b;
void c ()
{
(__attribute__ ((__vector_size__ (4 * sizeof (long)))) int)
__builtin_ia32_extractf64x4_mask ((__attribute__ ((__vector_size__ (
8 * sizeof (double)))) double) a,
1, b, 1);
}
$ gcc -ffloat-store /tmp/tmp6iytybcl.i -mavx512f
/tmp/tmp6iytybcl.i: In function ‘c’:
/tmp/tmp6iytybcl.i:9:1: error: unrecognizable insn:
}
^
(insn 12 11 16 2 (set (mem:V4DF (plus:DI (reg/f:DI 82 virtual-stack-vars)
(const_int -160 [0xffffffffffffff60])) [2 S32 A256])
(vec_merge:V4DF (vec_select:V4DF (reg:V8DF 89)
(parallel [
(const_int 4 [0x4])
(const_int 5 [0x5])
(const_int 6 [0x6])
(const_int 7 [0x7])
]))
(reg:V4DF 90)
(reg:QI 91))) "/tmp/tmp6iytybcl.i":6 -1
(nil))
/tmp/tmp6iytybcl.i:9:1: internal compiler error: in extract_insn, at
recog.c:2311
0xb97008 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc/rtl-error.c:108
0xb97039 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
../../gcc/rtl-error.c:116
0xb645e1 extract_insn(rtx_insn*)
../../gcc/recog.c:2311
0x92e163 instantiate_virtual_regs_in_insn
../../gcc/function.c:1589
0x92e163 instantiate_virtual_regs
../../gcc/function.c:1957
0x92e163 execute
../../gcc/function.c:2006
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #50 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #44)
> Created attachment 41048 [details]
> trial patch
>
> Does this fix the issue? I don't have an ARM setup handy for testing.
I should.
Note that what changed with GCC 7 is only that unions with char members
no longer behave as alias-set zero but 12.8/16 talks about all unions,
not just unions with char members.
Now I read comment#14 as that _only_ char[] members (of structs or unions)
may ever "contain" different dynamic types. Any pointer to a part of
the standard that singles out char[] that way?
Note your proposed patch will weaken TBAA for all structs/unions with a char
(array) member for the task of aggregate copying. Might not be too bad
as open-coding memberwise copy would expose alias-set zero writes as well.
The change that exposed char[] union handling differences is
r223126 | rguenth | 2015-05-13 12:53:42 +0200 (Wed, 13 May 2015) | 10 lines
2015-05-13 Richard Biener <rguenther@suse.de>
PR middle-end/66110
* alias.c (alias_sets_conflict_p): Do not treat has_zero_child
specially.
which is to avoid having aggregates with char members aliasing with everything,
instead they only alias with alias subsets (including explicit zero).
So if you take the original reduced testcase in this PR and exchange the
char[] array inside the union with a int[] array then the "bug" should trigger
with older GCC as well. That is, GCC never implemented 12.8/16.
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Subject: [Bug tree-optimization/80171] [5/6 Regression] ICE (Segmentation fault) with optimization
Date: Mon, 27 Mar 2017 07:36:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0.1
Summary|[5/6/7 Regression] ICE |[5/6 Regression] ICE
|(Segmentation fault) with |(Segmentation fault) with
|optimization |optimization
Known to fail|7.0.1 |
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-559004-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 07:36:23 2017
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Subject: [Bug tree-optimization/80171] [5/6 Regression] ICE (Segmentation fault) with optimization
Date: Mon, 27 Mar 2017 07:36:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Mar 27 07:35:44 2017
New Revision: 246490
URL: https://gcc.gnu.org/viewcvs?rev=246490&root=gcc&view=rev
Log:
2017-03-27 Richard Biener <rguenther@suse.de>
PR middle-end/80171
* gimple-fold.c (fold_ctor_reference): Properly guard against
NULL return value from canonicalize_constructor_val.
* g++.dg/torture/pr80171.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/torture/pr80171.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-fold.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/80207] New: ICE on invalid code in comptypes at cp/typeck.c:1434
Date: Mon, 27 Mar 2017 07:39:00 -0000
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Bug ID: 80207
Summary: ICE on invalid code in comptypes at cp/typeck.c:1434
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
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Target: arm-linux-gnueabi
Created attachment 41055
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41055&action=edit
test-case
Following llvm test-case ICEs on trunk:
$ arm-linux-gnueabi-g++ ~/Downloads/cxx0x-defaulted-functions.cpp -mflip-thumb
/home/marxin/BIG/Programming/llvm-project/llvm/tools/clang/test/SemaCXX/cxx0x-defaulted-functions.cpp:3:13:
error: ‘void fn()’ cannot be defaulted
void fn() = default; // expected-error {{only special member}}
^~~~~~~
/home/marxin/BIG/Programming/llvm-project/llvm/tools/clang/test/SemaCXX/cxx0x-defaulted-functions.cpp:5:15:
error: ‘void foo::fn()’ cannot be defaulted
void fn() = default; // expected-error {{only special member}}
^~~~~~~
/home/marxin/BIG/Programming/llvm-project/llvm/tools/clang/test/SemaCXX/cxx0x-defaulted-functions.cpp:29:11:
internal compiler error: canonical types differ for identical types void*
(bar::)(int) noexcept (<uninstantiated>) and void* (bar::)(int) noexcept
(<uninstantiated>)
bar::~bar() = default;
^
0x75f7df comptypes(tree_node*, tree_node*, int)
.././../gcc/cp/typeck.c:1434
0x62d426 duplicate_decls(tree_node*, tree_node*, bool)
.././../gcc/cp/decl.c:2195
0x5c1e0c grokfndecl
.././../gcc/cp/decl.c:8927
0x641938 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
.././../gcc/cp/decl.c:12223
0x643266 start_decl(cp_declarator const*, cp_decl_specifier_seq*, int,
tree_node*, tree_node*, tree_node**)
.././../gcc/cp/decl.c:4964
0x7446c9 cp_parser_init_declarator
.././../gcc/cp/parser.c:19251
0x7453af cp_parser_simple_declaration
.././../gcc/cp/parser.c:12773
0x74610a cp_parser_block_declaration
.././../gcc/cp/parser.c:12599
0x74e05e cp_parser_declaration
.././../gcc/cp/parser.c:12496
0x74e4b6 cp_parser_declaration_seq_opt
.././../gcc/cp/parser.c:12372
0x74e7e8 cp_parser_translation_unit
.././../gcc/cp/parser.c:4366
0x74e7e8 c_parse_file()
.././../gcc/cp/parser.c:38423
0x8b2d52 c_common_parse_file()
.././../gcc/c-family/c-opts.c:1107
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Subject: [Bug ipa/79776] [7 Regression] ICE on valid code in insert_vi_for_tree, at tree-ssa-structalias.c:2807
Date: Mon, 27 Mar 2017 07:50:00 -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 #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
We are ignoring global.inlined_to when walking over nodes already.
What I wonder now is, as we're obviously seeing thunks as first class functions
in IPA-PTA, we are walking over thunks in addition to aliases at all. I
suppose
this is for the case the thunk doesn't have a body (and thus we'd miss the
call to the real function).
Thus
Index: gcc/tree-ssa-structalias.c
===================================================================
--- gcc/tree-ssa-structalias.c (revision 246489)
+++ gcc/tree-ssa-structalias.c (working copy)
@@ -7615,7 +7615,7 @@ struct pt_solution ipa_escaped_pt
static bool
associate_varinfo_to_alias (struct cgraph_node *node, void *data)
{
- if ((node->alias || node->thunk.thunk_p)
+ if ((node->alias || (node->thunk.thunk_p && ! node->has_gimple_body_p ()))
&& node->analyzed)
insert_vi_for_tree (node->decl, (varinfo_t)data);
return false;
not sure why we check ->analyzed here.
Hmm, but thunks never have a body according to has_gimple_body_p.
So we are skipping all thunks, even those with gimple bodies, in
FOR_EACH_DEFINED_FUNCTION (node)
{
varinfo_t vi;
/* Nodes without a body are not interesting. Especially do not
visit clones at this point for now - we get duplicate decls
there for inline clones at least. */
if (!node->has_gimple_body_p () || node->global.inlined_to)
continue;
that means excluding inlined_to thunks is ok.
Testing that.
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Subject: [Bug tree-optimization/80170] SLP vectorization creates aligned access
Date: Mon, 27 Mar 2017 08:08:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Mar 27 08:07:49 2017
New Revision: 246491
URL: https://gcc.gnu.org/viewcvs?rev=246491&root=gcc&view=rev
Log:
2017-03-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/80170
* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Make
sure DR/SCEV didnt fold in constants we do not see when looking
at the reference base alignment.
* gcc.dg/pr80170.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr80170.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c
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Subject: [Bug c/80173] ICE in store_bit_field_1, at expmed.c:787
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----------------------------------------------------------------------------
Keywords| |accepts-invalid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-27
Component|rtl-optimization |c
Ever confirmed|0 |1
Known to fail| |7.0.1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed on trunk. Rejected with 4.7 and before:
t.i: In function ‘foo’:
t.i:11:25: error: data type of ‘u’ isn’t suitable for a register
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Subject: [Bug c/80173] [5/6/7 Regression] ICE in store_bit_field_1, at expmed.c:787
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What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Target Milestone|--- |5.5
Summary|ICE in store_bit_field_1, |[5/6/7 Regression] ICE in
|at expmed.c:787 |store_bit_field_1, at
| |expmed.c:787
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Subject: [Bug c++/80176] [5/6/7 Regression] cannot bind reference to static member function using object access expression
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Subject: [Bug regression/80208] New: DJGPP max object file alignment regression
Date: Mon, 27 Mar 2017 08:20:00 -0000
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Bug ID: 80208
Summary: DJGPP max object file alignment regression
Product: gcc
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Using DJGPP, requested alignment is not clamped anymore:
[/tmp]☠echo 'int __attribute__ ((aligned (16))) x;' > a.c &&
i686-pc-msdosdjgpp-cc -c a.c
[/tmp]☠echo 'int __attribute__ ((aligned (32))) x;' > a.c &&
i686-pc-msdosdjgpp-cc -c a.c
a.c:1:36: error: alignment of ‘x’ is greater than maximum object file alignment
16
int __attribute__ ((aligned (32))) x;
^
[/tmp]â˜
This is a regression since r205040
(https://github.com/gcc-mirror/gcc/commit/f8f7421ff48c9a90a63281bb09ff67d4f56755cf).
We hit that issue in the FFmpeg project where such alignment is requested in
random places (because we sometimes have AVX2 optimizations, which shouldn't
concern a FreeDOS configuration).
Here is a simple patch that fixes the issue:
--- gcc/varasm.c 2017-03-26 20:10:03.082212374 +0200
+++ gcc/varasm.c 2017-03-26 20:10:00.079320606 +0200
@@ -1005,8 +1005,8 @@
if (align > MAX_OFILE_ALIGNMENT)
{
- error ("alignment of %q+D is greater than maximum object "
+ warning (0, "alignment of %q+D is greater than maximum object "
"file alignment %d", decl,
MAX_OFILE_ALIGNMENT/BITS_PER_UNIT);
align = MAX_OFILE_ALIGNMENT;
}
The fallback to MAX_OFILE_ALIGNMENT is still present so it's enough to fix the
problem.
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Subject: [Bug tree-optimization/80181] [7 Regression] ICE in set_lattice_value, at tree-ssa-ccp.c:505
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Driver QOI issue.
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Subject: [Bug sanitizer/80168] [5/6/7 Regression] ICE in make_decl_rtl, at varasm.c:1311 w/ VLA and -fsanitizedress
Date: Mon, 27 Mar 2017 08:25:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Mar 27 08:25:01 2017
New Revision: 246492
URL: https://gcc.gnu.org/viewcvs?rev=246492&root=gcc&view=rev
Log:
PR sanitizer/80168
* asan.c (instrument_derefs): Copy over last operand from
original COMPONENT_REF to the new COMPONENT_REF with
DECL_BIT_FIELD_REPRESENTATIVE.
* ubsan.c (instrument_object_size): Likewise.
* gcc.dg/asan/pr80168.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/asan/pr80168.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/asan.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/ubsan.c
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Subject: [Bug rtl-optimization/80193] [7 Regression] ICE on valid (but hairy) C code at -O3 on x86_64-linux-gnu: in check_allocation, at ira.c:2563
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80193
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Known to work| |6.3.1
Last reconfirmed| |2017-03-27
Component|middle-end |rtl-optimization
CC| |vmakarov at gcc dot gnu.org
Ever confirmed|0 |1
Summary|ICE on valid (but hairy) C |[7 Regression] ICE on valid
|code at -O3 on |(but hairy) C code at -O3
|x86_64-linux-gnu: in |on x86_64-linux-gnu: in
|check_allocation, at |check_allocation, at
|ira.c:2563 |ira.c:2563
Target Milestone|--- |7.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Works with GCC 6 branch.
>From gcc-bugs-return-559016-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 08:29:12 2017
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Subject: [Bug c++/80194] [5 Regression] ICE with local constant referenced by a lambda expression
Date: Mon, 27 Mar 2017 08:29:00 -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| |4.9.4, 6.3.1, 7.0.1
Keywords| |ice-on-valid-code
Last reconfirmed| |2017-03-27
Ever confirmed|0 |1
Summary|ICE with local constant |[5 Regression] ICE with
|referenced by a lambda |local constant referenced
|expression |by a lambda expression
Target Milestone|--- |5.5
Known to fail| |5.4.1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-559017-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 08:33:24 2017
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/80209] New: libgo test failure, dir gotest$$ not found
Date: Mon, 27 Mar 2017 08:33:00 -0000
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Bug ID: 80209
Summary: libgo test failure, dir gotest$$ not found
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
At r246482, testing with:
...
make -k -j13 check RUNTESTFLAGS="--target_board='unix/ unix/-m32'"
...
I run into:
...
/home/vries/gcc_versions/data/ref-master-17-03-26/src/libgo/testsuite/gotest:
line 169: cd: gotest19618: No such file or directory
file libcalls.go not found
FAIL: syscall
...
In gotest we see the source of the cd:
...
165 DIR=gotest$$
166 rm -rf $DIR
167 mkdir $DIR
168
169 cd $DIR
170 mkdir test
171 cd test
172
173 if test $keep = false; then
174 trap "cd ../..; rm -rf $DIR" 0 1 2 3 14 15
175 else
176 trap "cd ../..; echo Keeping $DIR" 0 1 2 3 14 15
177 fi
...
I'm not familiar enough with the libgo test infrastructure to say whether:
- there could be an underlying problem, or
- we can disregard this as a filesystem failure or some such.
>From gcc-bugs-return-559018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 08:34:04 2017
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Subject: [Bug tree-optimization/80198] [6/7 Regression] does not vectorize generic inplace integer operation
Date: Mon, 27 Mar 2017 08:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-27
CC| |amker at gcc dot gnu.org,
| |law at gcc dot gnu.org
Blocks| |53947, 65917
Target Milestone|--- |6.4
Ever confirmed|0 |1
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Another fallout of that questionable change...
Note it's true that the vectorizer doesn't special-case zero dependence
distance when doing runtime checking for aliasing, that's a missed feature.
Not sure
if we can cheaply add that case. If we know the difference we are looking at
is >= 0 we can bias by -1 (unsigned).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65917
[Bug 65917] [6 Regression] XFAIL: gcc.dg/tree-ssa/20030922-2.c
scan-tree-dump-times dom1 "if " 2
>From gcc-bugs-return-559019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 08:38:51 2017
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Subject: [Bug c/80201] groff build fails with -floop-nest-optimize -fgraphite-identity
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed for GCC 6.3.0, works on the branch so this seems to have been fixed
recently.
>From gcc-bugs-return-559020-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 08:41:33 2017
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Subject: [Bug rtl-optimization/80197] pgo dramatically pessimizes scimark2 MonteCarlo benchmark
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-27
CC| |jakub at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
For some reason, recently fixed if-conversion (PR79389) does not trigger in PGO
case. There is still a jump with -O2:
mulsd %xmm0, %xmm5
mulsd %xmm2, %xmm2
addsd %xmm2, %xmm5
ucomisd %xmm5, %xmm4
jb .L17
.L16:
addl $1, %ebp
.L17:
addl $1, %edi
cmpl %edi, %ebx
je .L5
Since this asm corresponds to random operands, the jump can't be predicted:
for (count=0; count<Num_samples; count++)
{
double x= Random_nextDouble(R);
double y= Random_nextDouble(R);
if ( x*x + y*y <= 1.0)
under_curve ++;
}
Based on the discussion in PR79389, and the fact that -O2 and -O3 both compile
to a jump, I suspect that loop splitting cost model should be fine tuned to
also handle PGO case. Note that
Adding some CCs.
>From gcc-bugs-return-559021-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 08:47:08 2017
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Subject: [Bug c++/80202] Spurious warning "array subscript is below array bounds" with if-statement and char to unsigned int conversion
Date: Mon, 27 Mar 2017 08:47:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-27
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed for GCC 6, seems to be fixed on trunk. It's a missed optimization in
VRP:
<bb 2>:
_3 = (int) reg_2(D);
if (_3 <= 0)
goto <bb 3>;
else
goto <bb 6>;
<bb 3>:
_9 = ASSERT_EXPR <_3, _3 <= 0>;
switch (reg_2(D)) <default: <L4>, case 1 ... 2: <L3>>
we fail to place an assertion for reg_2(D).
OTOH for trunk we simplify the test to if (reg == 0) there and thus
simplify the situation upfront.
>From gcc-bugs-return-559022-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 08:49:45 2017
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Subject: [Bug ipa/80205] [5/6/7 Regression] ICE in walk_ssa_copies at ipa-polymorphic-call.c:835
Date: Mon, 27 Mar 2017 08:49:00 -0000
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----------------------------------------------------------------------------
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Subject: [Bug target/80210] New: ICE in in extract_insn, at recog.c:2311 on ppc64 for with __builtin_pow
Date: Mon, 27 Mar 2017 09:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80210
Bug ID: 80210
Summary: ICE in in extract_insn, at recog.c:2311 on ppc64 for
with __builtin_pow
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: ppc64-linux-gnu
Following test-case ICEs:
$ cat /tmp/ice.c
double
do_pow_0_5_default (double a)
{
return __builtin_pow (a, 0.5); /* should generate fsqrt */
}
#pragma GCC target "no-powerpc-gpopt,no-powerpc-gfxopt"
#pragma GCC reset_options
$ ppc64-linux-gnu-gcc -Ofast /tmp/ice.c
/tmp/ice.c: In function ‘do_pow_0_5_default’:
/tmp/ice.c:5:1: error: unrecognizable insn:
}
^
(insn 6 3 10 2 (set (reg:DF 155 [ <retval> ])
(sqrt:DF (reg/v:DF 156 [ a ]))) "/tmp/ice.c":4 -1
(nil))
/tmp/ice.c:5:1: internal compiler error: in extract_insn, at recog.c:2311
0xb0d1d8 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
.././../gcc/rtl-error.c:108
0xb0d209 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
.././../gcc/rtl-error.c:116
0xade5f1 extract_insn(rtx_insn*)
.././../gcc/recog.c:2311
0x8a1ee3 instantiate_virtual_regs_in_insn
.././../gcc/function.c:1589
0x8a1ee3 instantiate_virtual_regs
.././../gcc/function.c:1957
0x8a1ee3 execute
.././../gcc/function.c:2006
>From gcc-bugs-return-559024-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 09:06:34 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80211] New: ICE in curr_insn_transform, at lra-constraints.c:3816
Date: Mon, 27 Mar 2017 09:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80211
Bug ID: 80211
Summary: ICE in curr_insn_transform, at lra-constraints.c:3816
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: ppc64-linux-gnu
Following test-case ICEs:
$ int a ()
{
_Decimal64 b;
if (__builtin_dfp_dtstsfi_ov (3, b))
return 3;
}
$ ppc64-linux-gnu-gcc -mpower9-dform-vector -m32 -mcpu=401 /tmp/tmpze1ol1ys.i
/tmp/tmpze1ol1ys.i: In function ‘a’:
/tmp/tmpze1ol1ys.i:6:1: error: unable to generate reloads for:
}
^
(insn 6 5 7 2 (set (reg:CCFP 159)
(compare:CCFP (unspec:DD [
(const_int 3 [0x3])
(reg:DD 158)
] UNSPEC_DTSTSFI)
(const_int 0 [0]))) "/tmp/tmpze1ol1ys.i":4 1930 {*dfp_sgnfcnc_dd}
(expr_list:REG_DEAD (reg:DD 158)
(nil)))
/tmp/tmpze1ol1ys.i:6:1: internal compiler error: in curr_insn_transform, at
lra-constraints.c:3816
0xb0d1d8 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
.././../gcc/rtl-error.c:108
0xa0da97 curr_insn_transform
.././../gcc/lra-constraints.c:3816
0xa0e766 lra_constraints(bool)
.././../gcc/lra-constraints.c:4785
0x9f7dec lra(_IO_FILE*)
.././../gcc/lra.c:2392
0x9ac6d1 do_reload
.././../gcc/ira.c:5451
0x9ac6d1 execute
.././../gcc/ira.c:5635
>From gcc-bugs-return-559025-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 09:10:10 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80181] [7 Regression] ICE in set_lattice_value, at tree-ssa-ccp.c:505
Date: Mon, 27 Mar 2017 09:10:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, so we have
dl_7 = vp_2 ^ _1;
dl_8 = dl_7 ^ vp_2;
where in the first iteration dl_7 is optimistically _1 (vp_2 is 0) and
thus this gets simplified to dl_7 (CONSTANT). While
in the 2nd iteration it is VARYING, then this gets simplified to _1
(CONSTANT) which has already been fully propagated and thus gets its
lattice value used (UNDEFINED). So we get a bogus lattice transition
CONSTANT -> UNDEFINED.
There's a missed optimization that we do not treat XOR as UNDEFINED if
one operand is undefined. That fixes the testcase.
>From gcc-bugs-return-559026-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 09:14:59 2017
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Subject: [Bug middle-end/80208] DJGPP max object file alignment regression
Date: Mon, 27 Mar 2017 09:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |djgpp
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-27
CC| |jsm28 at gcc dot gnu.org
Component|regression |middle-end
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
No testcase came with the rev. CCing author.
>From gcc-bugs-return-559027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 09:17:49 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80186] ICE on C++ code with invalid constructor on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Mon, 27 Mar 2017 09:17:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-03-27
Assignee|unassigned at gcc dot gnu.org |paolo.carlini at oracle dot com
Ever confirmed|0 |1
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
>From gcc-bugs-return-559028-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 09:27:27 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/80197] pgo dramatically pessimizes scimark2 MonteCarlo benchmark
Date: Mon, 27 Mar 2017 09:27:00 -0000
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--- Comment #2 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 27 Mar 2017, ubizjak at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80197
>
> Uroš Bizjak <ubizjak at gmail dot com> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|UNCONFIRMED |NEW
> Last reconfirmed| |2017-03-27
> CC| |jakub at gcc dot gnu.org,
> | |rguenth at gcc dot gnu.org
> Ever confirmed|0 |1
>
> --- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
> For some reason, recently fixed if-conversion (PR79389) does not trigger in PGO
> case. There is still a jump with -O2:
>
> mulsd %xmm0, %xmm5
> mulsd %xmm2, %xmm2
> addsd %xmm2, %xmm5
> ucomisd %xmm5, %xmm4
> jb .L17
> .L16:
> addl $1, %ebp
> .L17:
> addl $1, %edi
> cmpl %edi, %ebx
> je .L5
>
> Since this asm corresponds to random operands, the jump can't be predicted:
>
> for (count=0; count<Num_samples; count++)
> {
> double x= Random_nextDouble(R);
> double y= Random_nextDouble(R);
>
> if ( x*x + y*y <= 1.0)
> under_curve ++;
>
> }
>
> Based on the discussion in PR79389, and the fact that -O2 and -O3 both compile
> to a jump, I suspect that loop splitting cost model should be fine tuned to
> also handle PGO case. Note that
>
> Adding some CCs.
Not sure - loop splitting isn't done here and doing it would remove
the if-conversion opportunity.
I think that if FDO says either the true or false edge is very likely
then not if-converting the loop is best? Or is a well-predicted
conditional move as good as a well-predicted if? 10% missed branches
would be more than
/* When branch is predicted to be taken with probability lower than this
threshold (in percent), then it is considered well predictable. */
DEFPARAM (PARAM_PREDICTABLE_BRANCH_OUTCOME,
"predictable-branch-outcome",
"Maximal estimated outcome of branch considered predictable.",
2, 0, 50)
so it shouldn't affect if-conversion...
Are we sure we're not hitting some architectural limitation here? Like
disabling the loop stream cache because of size or the CFG?
(otoh we have calls in the loop(?)).
>From gcc-bugs-return-559029-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 09:27:29 2017
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Subject: [Bug target/80207] ICE on invalid code in comptypes at cp/typeck.c:1434
Date: Mon, 27 Mar 2017 09:27:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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| |ktkachov at gcc dot gnu.org
Component|c++ |target
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
r227888 reports numerous errors but no ICE, r228940 already ICEs.
But gcc 5 did not support -mflip-thumb, and without that option it doesn't ICE,
so this really doesn't look like a regression compared to released compilers.
>From gcc-bugs-return-559030-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 09:31:38 2017
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Subject: [Bug target/80206] ICE in extract_insn, at recog.c:2327
Date: Mon, 27 Mar 2017 09:31:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Indeed, started to ICE with r206261, before it has been rejected as invalid.
Let me have a look.
>From gcc-bugs-return-559031-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 09:43:20 2017
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Subject: [Bug libstdc++/80137] [6/7 Regression] std::generate_canonical calls its generator a non-constant number of times
Date: Mon, 27 Mar 2017 09:43:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
We need to handle targets without C99's nextafter, but maybe this would be OK:
if (__builtin_expect(__ret >= _RealType(1), 0))
{
#if _GLIBCXX_USE_C99_MATH_TR1
__ret = std::nextafter(_RealType(1), _RealType(0));
#else
__ret = _RealType(0);
#endif
}
If we reach 1.0 it's because we're rounding up or to nearest, and so returning
zero in that case would counteract the decreased probability of getting zero
otherwise.
>From gcc-bugs-return-559032-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 09:49:42 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 09:49:00 -0000
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--- Comment #51 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Doesn't 3.10/10 explicitly say that it is undefined to use a union to
to move an object representation that is not a member of the union?
"If a program attempts to access the stored value of an object through a
glvalue of other than one of the
following types the behavior is undefined:52
— the dynamic type of the object,
— a cv-qualified version of the dynamic type of the object,
— a type similar (as defined in 4.4) to the dynamic type of the object,
— a type that is the signed or unsigned type corresponding to the dynamic type
of the object,
— a type that is the signed or unsigned type corresponding to a cv-qualified
version of the dynamic type
of the object,
— an aggregate or union type that includes one of the aforementioned types
among its elements or non-
static data members (including, recursively, an element or non-static data
member of a subaggregate
or contained union),
— a type that is a (possibly cv-qualified) base class type of the dynamic type
of the object,
— a char or unsigned char type."
>From gcc-bugs-return-559034-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 09:53:51 2017
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 09:53:00 -0000
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--- Comment #52 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 27 Mar 2017, bernd.edlinger at hotmail dot de wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
>
> --- Comment #51 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
> Doesn't 3.10/10 explicitly say that it is undefined to use a union to
> to move an object representation that is not a member of the union?
That was my reading... but 3.10/10 talks about "attempts to access
the stored value of an object" and Jason says that this doesn't apply
to d = *p but the result of the decomposition to memberwise copy
plus union special handling (where it wouldn't apply at all)
So the question (DR?) is whether 3.10/10 applies to the access as
written in the source or to it after the decomposition happened.
> "If a program attempts to access the stored value of an object through a
> glvalue of other than one of the
> following types the behavior is undefined:52
> — the dynamic type of the object,
> — a cv-qualified version of the dynamic type of the object,
> — a type similar (as defined in 4.4) to the dynamic type of the object,
> — a type that is the signed or unsigned type corresponding to the dynamic type
> of the object,
> — a type that is the signed or unsigned type corresponding to a cv-qualified
> version of the dynamic type
> of the object,
> — an aggregate or union type that includes one of the aforementioned types
> among its elements or non-
> static data members (including, recursively, an element or non-static data
> member of a subaggregate
> or contained union),
> — a type that is a (possibly cv-qualified) base class type of the dynamic type
> of the object,
> — a char or unsigned char type."
>From gcc-bugs-return-559033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 09:53:42 2017
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Subject: [Bug c++/80191] diagnostic placeholder "new initializer" must be marked for translation
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Martin, that might be nice for IDEs too, which can presumably aren't restricted
to using a single font like most terminals.
(In reply to Roland Illig from comment #2)
> But then shouldn't it be spelled "new-initializer", not "new initializer"?
It's still clearly related to the same thing, even without the hyphen.
At the very least, "new" shouldn't be translated, because it refers to the C++
keyword, which is always spelled "new" and not "neu" or "nouveau" or anything
else. It's an initializer for a new-expression, not an initializer that is
newer than some other initializer.
>From gcc-bugs-return-559035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 09:55:48 2017
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Subject: [Bug libstdc++/80196] fenv_t not declared
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2017-03-27
Resolution|WORKSFORME |---
Ever confirmed|0 |1
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reopening. We still need to know why building the PCH fails to find fenv_t for
some people.
>From gcc-bugs-return-559036-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:01:26 2017
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #53 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to rguenther@suse.de from comment #52)
> On Mon, 27 Mar 2017, bernd.edlinger at hotmail dot de wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
> >
> > --- Comment #51 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
> > Doesn't 3.10/10 explicitly say that it is undefined to use a union to
> > to move an object representation that is not a member of the union?
>
> That was my reading... but 3.10/10 talks about "attempts to access
> the stored value of an object" and Jason says that this doesn't apply
> to d = *p but the result of the decomposition to memberwise copy
> plus union special handling (where it wouldn't apply at all)
>
The boost code was: "this->functor = f.functor;"
thus directly accessing the union, so there was no decomposition
to memberwise copy, right?
>From gcc-bugs-return-559037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:04:12 2017
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Subject: [Bug ipa/80212] New: [5/6/7 Regression] ICE: error: comdat-local function called by virtual
Date: Mon, 27 Mar 2017 10:04:00 -0000
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Bug ID: 80212
Summary: [5/6/7 Regression] ICE: error: comdat-local function
called by virtual
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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Starting from GCC 5.1.0, we ICE on:
$ cat /tmp/tmpy_z8ftoy.ii
struct b
{
virtual b *c () const;
};
struct d : virtual b
{
};
struct e : d
{
e *
c () const
{
}
};
main () { e a; }
$ g++ /tmp/tmpy_z8ftoy.ii -O2 --param
partial-inlining-entry-probability=403796683 -fno-early-inlining
/tmp/tmpy_z8ftoy.ii:15:16: error: comdat-local function called by virtual e*
e::_ZTch0_v0_n32_NK1e1cEv() const outside its comdat
main () { e a; }
^
*.LTHUNK0/1 (e* *.LTHUNK0() const) @0x7f873420d450
Type: function definition analyzed alias cpp_implicit_alias
Visibility: prevailing_def_ironly comdat_group:_ZNK1e1cEv
section:.text._ZNK1e1cEv (implicit_section) artificial
Same comdat group as: _ZNK1e1cEv/0
References: _ZNK1e1cEv/0 (alias)
Referring:
Availability: available
First run: 0
Function flags:
Called by: _ZTch0_v0_n32_NK1e1cEv.part.0/29 (1.00 per call) (can throw
external)
Calls:
/tmp/tmpy_z8ftoy.ii:15:16: internal compiler error: verify_cgraph_node failed
0x9eac71 cgraph_node::verify_node()
.././../gcc/cgraph.c:3490
0x9df794 symtab_node::verify()
.././../gcc/symtab.c:1183
0x9df86f symtab_node::verify_symtab_nodes()
.././../gcc/symtab.c:1203
0xc2b239 symtab_node::checking_verify_symtab_nodes()
.././../gcc/cgraph.h:616
0xc2b239 symbol_table::remove_unreachable_nodes(_IO_FILE*)
.././../gcc/ipa.c:698
0xd1c158 execute_todo
.././../gcc/passes.c:2030
Original test-case is:
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/inherit/covariant17.C
Adding -fno-partial-inlining can fix the problem.
>From gcc-bugs-return-559038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:06:12 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80200] decNumber.c : error : #include_next is a GCC extension
Date: Mon, 27 Mar 2017 10:06:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Roman from comment #0)
> Hello,
>
> while building the Subversion tree (Revision 246482) the following error
> occurs:
>
> In file included from /home/roman/gcc-source/libdecnumber/decNumber.c:175:0:
> /usr/local/include/c++/7.0.0/stdlib.h:30:3: error: #include_next is a GCC
> extension [-Werror]
> # include_next <stdlib.h>
> ^~~~~~~~~~~~
> In file included from
> /home/roman/gcc-source/libdecnumber/decNumberLocal.h:40:0,
> from /home/roman/gcc-source/libdecnumber/decNumber.c:181:
> /usr/local/include/c++/7.0.0/stdlib.h:30:3: error: #include_next is a GCC
> extension [-Werror]
> # include_next <stdlib.h>
> ^~~~~~~~~~~~
> cc1: all warnings being treated as errors
> Makefile:193: recipe for target 'decNumber.o' failed.
--disable-werror will allow the build to proceed.
> Operating System: Gentoo
>
> Build System:
> /usr/local/bin/gcc --version
> gcc (GCC) 7.0.1 20170304 (experimental)
> Copyright (C) 2017 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
This is not very useful information, we know what the copyright notice for GCC
says! :-)
As it says at https://gcc.gnu.org/bugs/ the output of 'gcc -v' is what we need.
>From gcc-bugs-return-559039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:09:11 2017
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Subject: [Bug bootstrap/80200] decNumber.c : error : #include_next is a GCC extension
Date: Mon, 27 Mar 2017 10:09:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c++ |bootstrap
Version|unknown |7.0.1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Maybe we need #pragma GCC system_header in the libstdc++ forwarding headers
that use #include_next, but we've not had that until now and it doesn't cause
problems for anybody else, so I'm not sure what's happening here.
Maybe some gentoo weirdness with default gcc settings?
>From gcc-bugs-return-559040-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:11:08 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80213] New: [7 Regression] ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:704
Date: Mon, 27 Mar 2017 10:11:00 -0000
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Bug ID: 80213
Summary: [7 Regression] ICE in check_loop_closed_ssa_use, at
tree-ssa-loop-manip.c:704
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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Starting from unrelated commit r237185, we ICE on:
$ gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/graphite/interchange-3.c
-Ofast --param hot-bb-frequency-fraction=55003173 -floop-parallelize-all
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/graphite/interchange-3.c: In
function ‘foo.constprop’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/graphite/interchange-3.c:13:1:
internal compiler error: in check_loop_closed_ssa_use, at
tree-ssa-loop-manip.c:704
foo (int N, int *res)
^~~
0xd6925f check_loop_closed_ssa_use
.././../gcc/tree-ssa-loop-manip.c:703
0xd6c17a verify_loop_closed_ssa(bool)
.././../gcc/tree-ssa-loop-manip.c:748
0x1309623 checking_verify_loop_closed_ssa
.././../gcc/tree-ssa-loop-manip.h:37
0x1309623 graphite_verify
.././../gcc/graphite-isl-ast-to-gimple.c:82
0x1309623 graphite_regenerate_ast_isl(scop*)
.././../gcc/graphite-isl-ast-to-gimple.c:3044
0x12fff77 graphite_transform_loops()
.././../gcc/graphite.c:330
0x1300530 graphite_transforms
.././../gcc/graphite.c:362
0x1300530 execute
.././../gcc/graphite.c:439
>From gcc-bugs-return-559041-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:14:17 2017
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Subject: [Bug libstdc++/80172] Segfault when using a constructed intializer list of tuple(int, variant) created through template pack expansion
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Not a bug.
>From gcc-bugs-return-559042-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:16:59 2017
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Subject: [Bug bootstrap/80200] decNumber.c : error : #include_next is a GCC extension
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--- Comment #3 from Andreas Schwab <schwab@linux-m68k.org> ---
That looks like someone is using -Wsystem-headers.
>From gcc-bugs-return-559043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:20:46 2017
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From: "gcc-bugs at marehr dot dialup.fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80172] Segfault when using a constructed intializer list of tuple(int, variant) created through template pack expansion
Date: Mon, 27 Mar 2017 10:20:00 -0000
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--- Comment #3 from gcc-bugs at marehr dot dialup.fu-berlin.de ---
Thank you for your feedback!
With std::array it works without a problem :)
>From gcc-bugs-return-559044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:21:16 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80214] New: ICE in s390_initial_elimination_offset, at config/s390/s390.c:10249
Date: Mon, 27 Mar 2017 10:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80214
Bug ID: 80214
Summary: ICE in s390_initial_elimination_offset, at
config/s390/s390.c:10249
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: s390x-suse-linux
Following test-case ICEs:
$ cat /tmp/tmp4b6ua9cs.i
int a;
int b () { __builtin_eh_return (b, a); }
$ s390x-linux-gnu-gcc -march=z10 /tmp/tmp4b6ua9cs.i
/tmp/tmp4b6ua9cs.i: In function ‘b’:
/tmp/tmp4b6ua9cs.i:2:33: warning: passing argument 1 of ‘__builtin_eh_return’
makes integer from pointer without a cast [-Wint-conversion]
int b () { __builtin_eh_return (b, a); }
^
/tmp/tmp4b6ua9cs.i:2:33: note: expected ‘long int’ but argument is of type ‘int
(*)()’
/tmp/tmp4b6ua9cs.i:2:36: warning: passing argument 2 of ‘__builtin_eh_return’
makes pointer from integer without a cast [-Wint-conversion]
int b () { __builtin_eh_return (b, a); }
^
/tmp/tmp4b6ua9cs.i:2:36: note: expected ‘void *’ but argument is of type ‘int’
/tmp/tmp4b6ua9cs.i:2:1: internal compiler error: in
s390_initial_elimination_offset, at config/s390/s390.c:10399
int b () { __builtin_eh_return (b, a); }
^~~
0xea6264 s390_initial_elimination_offset(int, int)
.././../gcc/config/s390/s390.c:10399
0xadf85d set_initial_elim_offsets
.././../gcc/reload1.c:3841
0xaeb729 calculate_elim_costs_all_insns()
.././../gcc/reload1.c:1562
0x9ae72d ira_costs()
.././../gcc/ira-costs.c:2258
0x9a8188 ira_build()
.././../gcc/ira-build.c:3420
0x99edae ira
.././../gcc/ira.c:5287
0x99edae execute
.././../gcc/ira.c:5592
>From gcc-bugs-return-559045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:21:35 2017
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Subject: [Bug rtl-optimization/80193] [7 Regression] ICE on valid (but hairy) C code at -O3 on x86_64-linux-gnu: in check_allocation, at ira.c:2563
Date: Mon, 27 Mar 2017 10:21:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r245057.
>From gcc-bugs-return-559046-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:22:19 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 10:22:00 -0000
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--- Comment #54 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 27 Mar 2017, bernd.edlinger at hotmail dot de wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
>
> --- Comment #53 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
> (In reply to rguenther@suse.de from comment #52)
> > On Mon, 27 Mar 2017, bernd.edlinger at hotmail dot de wrote:
> >
> > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
> > >
> > > --- Comment #51 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
> > > Doesn't 3.10/10 explicitly say that it is undefined to use a union to
> > > to move an object representation that is not a member of the union?
> >
> > That was my reading... but 3.10/10 talks about "attempts to access
> > the stored value of an object" and Jason says that this doesn't apply
> > to d = *p but the result of the decomposition to memberwise copy
> > plus union special handling (where it wouldn't apply at all)
> >
>
> The boost code was: "this->functor = f.functor;"
> thus directly accessing the union, so there was no decomposition
> to memberwise copy, right?
Right.
But still the other clause says the storage representation is transfered
and so you could read into that that no "access" happens and thus
3.10/10 doesn't apply.
>From gcc-bugs-return-559047-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:26:42 2017
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Subject: [Bug tree-optimization/80213] [7 Regression] ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:704
Date: Mon, 27 Mar 2017 10:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-559048-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:27:12 2017
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Subject: [Bug ipa/80212] [5/6/7 Regression] ICE: error: comdat-local function called by virtual
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-559049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:34:51 2017
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80179] [6/7 Regression] ICE initializing a static local object with flexible array member in verify_ctor_sanity, at cp/constexpr.c:2641
Date: Mon, 27 Mar 2017 10:34:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-27
CC| |mpolacek at gcc dot gnu.org
Summary|ICE initializing a static |[6/7 Regression] ICE
|local object with flexible |initializing a static local
|array member in |object with flexible array
|verify_ctor_sanity, at |member in
|cp/constexpr.c:2641 |verify_ctor_sanity, at
| |cp/constexpr.c:2641
Ever confirmed|0 |1
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirming the ICE.
$ xg++-5 -c l.cc
l.cc: In function ‘void bar(const char*)’:
l.cc:8:45: error: too many initializers for ‘const char* [0]’
static const struct S t = { 1, { a, "b" } };
^
>From gcc-bugs-return-559050-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:35:04 2017
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Subject: [Bug c++/80179] [6/7 Regression] ICE initializing a static local object with flexible array member in verify_ctor_sanity, at cp/constexpr.c:2641
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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>From gcc-bugs-return-559051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:38:39 2017
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80186] ICE on C++ code with invalid constructor on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Mon, 27 Mar 2017 10:38:00 -0000
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
I believe this can be fixed by checking the return value of
grok_ctor_properties (consistently with its other usage in decl.c):
Index: pt.c
===================================================================
--- pt.c (revision 246492)
+++ pt.c (working copy)
@@ -12408,8 +12408,8 @@ tsubst_decl (tree t, tree args, tsubst_flags_t com
if (DECL_CONSTRUCTOR_P (r) || DECL_DESTRUCTOR_P (r))
{
maybe_retrofit_in_chrg (r);
- if (DECL_CONSTRUCTOR_P (r))
- grok_ctor_properties (ctx, r);
+ if (DECL_CONSTRUCTOR_P (r) && !grok_ctor_properties (ctx, r))
+ RETURN (error_mark_node);
/* If this is an instantiation of a member template, clone it.
If it isn't, that'll be handled by
clone_constructors_and_destructors. */
>From gcc-bugs-return-559052-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:39:47 2017
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Subject: [Bug c++/80179] [6/7 Regression] ICE initializing a static local object with flexible array member in verify_ctor_sanity, at cp/constexpr.c:2641
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r231665.
>From gcc-bugs-return-559053-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 10:51:36 2017
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Subject: [Bug ipa/79776] [7 Regression] ICE on valid code in insert_vi_for_tree, at tree-ssa-structalias.c:2807
Date: Mon, 27 Mar 2017 10:51:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Mar 27 10:50:55 2017
New Revision: 246494
URL: https://gcc.gnu.org/viewcvs?rev=246494&root=gcc&view=rev
Log:
2017-03-27 Richard Biener <rguenther@suse.de>
PR ipa/79776
* tree-ssa-structalias.c (associate_varinfo_to_alias): Skip
inlined thunk clones.
* g++.dg/ipa/pr79776.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/ipa/pr79776.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
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>From gcc-bugs-return-559054-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 11:41:37 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80215] New: VN has trouble with conditional equivalences (DOM/FRE)
Date: Mon, 27 Mar 2017 11:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80215
Bug ID: 80215
Summary: VN has trouble with conditional equivalences (DOM/FRE)
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
Currently DOM doesn't handle either redundancy in foo or bar while FRE only
handles the first.
int d, e;
int foo (int a, int c)
{
e = a * c;
if (a == c)
return a * c;
return 0;
}
int bar (int a, int c)
{
e = a * c;
if (a == c)
return c * c;
return 0;
}
another example is
int e;
int baz (int a, int c)
{
e = a + c;
if (a == c)
return c + c;
return 0;
}
with the additional complication of c + c -> 2 * c canonicalization.
The issue is unifying of two values (plus eventual followup simplifications
that might be possible). VN algorithms generally do not handle this well.
For DOM-VRP I played with re-propagating starting from uses of the
newly recorded equivalency.
>From gcc-bugs-return-559055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 11:49:30 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80206] ICE in extract_insn, at recog.c:2327
Date: Mon, 27 Mar 2017 11:49:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
There are tons of issues in the vec_extract* patterns.
>From gcc-bugs-return-559056-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 11:51:02 2017
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Subject: [Bug rtl-optimization/80193] [7 Regression] ICE on valid (but hairy) C code at -O3 on x86_64-linux-gnu: in check_allocation, at ira.c:2563
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
As it is a RA issue, it is likely that change just uncovered a latent bug.
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Subject: [Bug target/80206] ICE in extract_insn, at recog.c:2327
Date: Mon, 27 Mar 2017 11:54:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Cleaned up testcase -ffloat-store -mavx512f:
typedef double v4df __attribute__ ((__vector_size__ (4 * sizeof (double))));
typedef double v8df __attribute__ ((__vector_size__ (8 * sizeof (double))));
v8df a;
v4df b;
void
foo (v4df *p)
{
*p = __builtin_ia32_extractf64x4_mask (a, 1, b, 1);
}
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #55 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Bernd Edlinger from comment #53)
> The boost code was: "this->functor = f.functor;"
And I still don't understand why may_alias doesn't help on the type of
this->functor.
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #56 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think may_alias attribute only affects pointers/references (pointer/reference
to may_alias type is considered to reference any type), but in this->functor =
f.functor the only pointer is this and *this likely isn't may_alias, and the
bug is about f.functor access anyway.
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #57 from Jonathan Wakely <redi at gcc dot gnu.org> ---
OK, so this appears to work (assuming may_alias on function_buffer):
function_buffer& aliasing_ref = f.functor;
this->functor = aliasing_ref;
It changes the GIMPLE from:
f1_2(D)->D.2297.functor = MEM[(const struct function
*)f2_3(D)].D.2297.functor;
to:
f1_2(D)->D.2297.functor = MEM[(const union function_buffer &
{ref-all})f2_3(D)];
Can I rely on that continuing to work? Is it likely to perform better than just
doing memcpy?
__builtin_memcpy(&this->functor, &f.functor, sizeof(f.functor));
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Subject: [Bug sanitizer/80114] asan-stack=1 with -fsanitize-address-use-after-scope and stack arrays multiplies code size
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WORKSFORME
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #58 from Jonathan Wakely <redi at gcc dot gnu.org> ---
But this seemingly equivalent code doesn't work:
this->functor = static_cast<function_buffer&>(f.functor);
>From gcc-bugs-return-559063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:28:21 2017
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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 rtl-optimization/60818] ICE in validate_condition_mode on powerpc*-linux-gnu*
Date: Mon, 27 Mar 2017 12:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60818
--- Comment #16 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
Also still reproducible in Debian. LibreOffice just failed to build with the
same problem [1]:
S=/<<PKGBUILDDIR>> && I=$S/instdir && W=$S/workdir && mkdir -p
$W/CxxObject/tools/source/generic/ $W/Dep/CxxObject/tools/source/generic/ && cd
/<<PKGBUILDDIR>> && powerpc-linux-gnuspe-g++ -DBOOST_ERROR_CODE_HEADER_ONLY
-DBOOST_SYSTEM_NO_DEPRECATED -DCPPU_ENV=gcc3 -DLINUX -DNDEBUG -DOPTIMIZE
-DOSL_DEBUG_LEVEL=0 -DPOWERPC -DPPC -DUNIX -DUNX -D_FORTIFY_SOURCE=2
-D_PTHREADS -D_REENTRANT -Wdate-time -Wdate-time -D_FORTIFY_SOURCE=2
-DTOOLS_DLLIMPLEMENTATION -DSYSTEM_ZLIB -DHAVE_GCC_VISIBILITY_FEATURE
-fvisibility=hidden -Wall -Wno-missing-braces -Wnon-virtual-dtor
-Wendif-labels -Wextra -Wundef -Wunused-macros -fmessage-length=0 -fno-common
-pipe -Wduplicated-cond -Wlogical-op -Wnull-dereference -Wshift-overflow=2
-Wunused-const-variable=1 -fvisibility-inlines-hidden -fPIC -Wshadow
-Woverloaded-virtual -std=gnu++14 -g1 -DEXCEPTIONS_ON -fexceptions
-fno-enforce-eh-specs -g1 -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=.
-fstack-protector-strong -Wformat -Werror=format-security -DLIBO_INTERNAL_ONLY
-c $S/tools/source/generic/config.cxx -o
$W/CxxObject/tools/source/generic/config.o -MMD -MT
$W/CxxObject/tools/source/generic/config.o -MP -MF
$W/Dep/CxxObject/tools/source/generic/config.d_ -I$S/tools/source/generic/
-I$S/tools/inc -I$S/include -I/usr/lib/jvm/default-java/include
-I/usr/lib/jvm/default-java/include/linux -I$S/config_host
-I$W/UnoApiHeadersTarget/udkapi/normal -I$W/UnoApiHeadersTarget/offapi/normal
-I/usr/include && mv $W/Dep/CxxObject/tools/source/generic/config.d_
$W/Dep/CxxObject/tools/source/generic/config.d
[build CXX] tools/source/generic/fract.cxx
/<<PKGBUILDDIR>>/tools/source/generic/color.cxx: In member function 'bool
Color::IsBright() const':
/<<PKGBUILDDIR>>/tools/source/generic/color.cxx:112:1: internal compiler error:
in validate_condition_mode, at config/rs6000/rs6000.c:18014
}
^
> [1] https://buildd.debian.org/status/fetch.php?pkg=libreoffice&arch=powerpcspe&ver=1%3A5.2.6-2&stamp=1490096724&raw=0
>From gcc-bugs-return-559065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:32:47 2017
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80217] New: [7 Regression] ICE in set_ssa_name_value (deep recursion in derive_equivalencs_from_bit_ior)
Date: Mon, 27 Mar 2017 12:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80217
Bug ID: 80217
Summary: [7 Regression] ICE in set_ssa_name_value (deep
recursion in derive_equivalencs_from_bit_ior)
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-7.0.0-alpha20170326 snapshot ICEs when compiling the following snippet w/
-O1 (-O2, -O3, -Ofast):
int uk, c4;
void
hk (int zo, unsigned char tu)
{
if (uk != 0)
{
for (;;)
{
}
if (uk != 0)
{
if (uk != 0)
{
tu |= (0 || ((c4 /= 2) / c4) * c4);
++c4;
uk += tu;
++uk;
}
++uk;
}
}
if (zo != 0)
{
uk = 2;
while (uk != 0)
uk = 1;
while (tu != 0)
{
lh:
zo |= uk;
if (zo != 0)
tu = zo;
else
tu = 0;
while (uk != 0)
{
}
}
}
for (uk = 0; uk < 1; ++uk)
for (uk = 0; uk < 1; ++uk)
{
uk = 1;
while (uk != 0)
{
}
}
goto lh;
}
% gcc-7.0.0-alpha20170326 -O1 -w -c btw2qvlq.c
gcc-7.0.0-alpha20170326: internal compiler error: Segmentation fault (program
cc1)
Program received signal SIGSEGV, Segmentation fault.
0x0000000000d7140c in set_ssa_name_value(tree_node*, tree_node*) ()
#0 0x0000000000d7140c in set_ssa_name_value(tree_node*, tree_node*) ()
#1 0x0000000000d41b4a in
const_and_copies::record_const_or_copy_raw(tree_node*, tree_node*, tree_node*)
()
#2 0x0000000000c99c7a in derive_equivalencs_from_bit_ior(tree_node*,
const_and_copies*) ()
#3 0x0000000000c99cb4 in derive_equivalencs_from_bit_ior(tree_node*,
const_and_copies*) ()
#4 0x0000000000c99cb4 in derive_equivalencs_from_bit_ior(tree_node*,
const_and_copies*) ()
#5 0x0000000000c99cb4 in derive_equivalencs_from_bit_ior(tree_node*,
const_and_copies*) ()
#6 0x0000000000c99cb4 in derive_equivalencs_from_bit_ior(tree_node*,
const_and_copies*) ()
#7 0x0000000000c99cb4 in derive_equivalencs_from_bit_ior(tree_node*,
const_and_copies*) ()
#8 0x0000000000c99cb4 in derive_equivalencs_from_bit_ior(tree_node*,
const_and_copies*) ()
#9 0x0000000000c99cb4 in derive_equivalencs_from_bit_ior(tree_node*,
const_and_copies*) ()
(More stack frames follow...)
>From gcc-bugs-return-559064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:32:39 2017
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Subject: [Bug middle-end/80216] New: [7 Regression] Memory hog w/ -O1
Date: Mon, 27 Mar 2017 12:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80216
Bug ID: 80216
Summary: [7 Regression] Memory hog w/ -O1
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: memory-hog
Severity: normal
Priority: P3
Component: middle-end
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At least gcc-7.0.0-alpha20170319 and gcc-7.0.0-alpha20170326 snapshots allocate
all available memory when compiling the following snippet w/ -O1:
int u4, lx, e0, zy, pz;
void
tb (int m6)
{
for (pz = 0; pz < 1; ++pz)
{
for (zy = 0; zy < 1; ++zy)
for (u4 = 0; u4 < 1; ++u4)
for (e0 = 0; e0 < 1; ++e0)
{
as:
for (;;)
{
}
}
if (e0 != 0)
goto ql;
if (0)
{
o3:
for (lx = 0; lx < 1; ++lx)
{
m6 |= lx;
if (m6 == 0)
lx = 0;
ql:
;
}
goto as;
}
}
goto o3;
}
% timeout 20 gcc-7.0.0-alpha20170326 -O1 -c bxvehker.c
zsh: exit 124 timeout 20 gcc-7.0.0-alpha20170326 -O1 -c bxvehker.c
>From gcc-bugs-return-559066-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:34:40 2017
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80218] New: [6/7 Regression] tree-call-cdce does not update block frequencies
Date: Mon, 27 Mar 2017 12:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80218
Bug ID: 80218
Summary: [6/7 Regression] tree-call-cdce does not update block
frequencies
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rsandifo at gcc dot gnu.org
Target Milestone: ---
tree-call-cdce.c updates the edge probabilities and counts, but doesn't do
anything to the block frequencies or counts. This causes the register
allocator to treat the fallback errno-setting calls as being much hotter than
they really are.
Although the bug goes back to at least GCC 5, GCC 6 patch r230488 caused us to
use the code much more often than previously. In an internal benchmark, we
were seeing spills in hot code that were confined to the "error" path in GCC 5
but are on the hot path in GCC 6 and later. I think this therefore counts as a
GCC 6 regression.
>From gcc-bugs-return-559068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:35:49 2017
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/80219] New: relative line numbers only working if gcc_{error,warning}_prefix defined
Date: Mon, 27 Mar 2017 12:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80219
Bug ID: 80219
Summary: relative line numbers only working if
gcc_{error,warning}_prefix defined
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
Relative line numbers for dg-{warning,error,bogus,message} are handled in
gcc-dg.exp:process-message.
dg-message is a gcc native construct, and uses process-message.
dg-error and dg-bogus are overridden to use process-message, if
gcc_error_prefix is defined (and save-dg-error is not already defined).
dg-warning is overridden to use process-message, if gcc_warning_prefix is
defined (and save-dg-warning is not already defined).
Consequently, for testcases that are run from a .exp file not setting
gcc_{error,warning}_prefix, using relative line numbers in
dg-{warning,error,bogus} doesn't work.
F.i., this doesn't work:
...
diff --git a/gcc/testsuite/gnat.dg/warn4.adb b/gcc/testsuite/gnat.dg/warn4.adb
index 94147c1..db21a42 100644
--- a/gcc/testsuite/gnat.dg/warn4.adb
+++ b/gcc/testsuite/gnat.dg/warn4.adb
@@ -12,7 +12,7 @@ procedure Warn4 is
type POSIX_String_Ptr is access all POSIX_String;
function sptr_to_psptr is new Unchecked_Conversion -- { dg-warning
"aliasing problem" }
- (String_Ptr, POSIX_String_Ptr); -- { dg-warning "" "" { target *-*-* } 14
}
+ (String_Ptr, POSIX_String_Ptr); -- { dg-warning "" "" { target *-*-* }
.-1 }
function To_POSIX_String (Str : String) return POSIX_String;
function To_POSIX_String (Str : String)
...
We get:
...
ERROR: gnat.dg/warn4.adb: expected integer but got ".-1" for " dg-warning 15 ""
"" { target *-*-* } .-1 "
UNRESOLVED: gnat.dg/warn4.adb: expected integer but got ".-1" for " dg-warning
15 "" "" { target *-*-* } .-1 "
...
>From gcc-bugs-return-559067-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:35:41 2017
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80218] [6/7 Regression] tree-call-cdce does not update block frequencies
Date: Mon, 27 Mar 2017 12:35:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-03-27
Assignee|unassigned at gcc dot gnu.org |rsandifo at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Testing a patch.
>From gcc-bugs-return-559069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:44:43 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80068] [Intel MPX] "internal compiler error" on 483.xalancbmk in SPEC CPU 2006
Date: Mon, 27 Mar 2017 12:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80068
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-27
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed that I can see ICE with 6.1.0, a bit different one, but on the same
preprocessed file:
DecimalDatatypeValidator.cpp:807:1: internal compiler error: in
duplicate_thunk_for_node, at cgraphclones.c:321
XERCES_CPP_NAMESPACE_END
^
0x961952 duplicate_thunk_for_node
/home/marxin/BIG/Programming/gcc/gcc/cgraphclones.c:321
0x961ac7 cgraph_edge::redirect_callee_duplicating_thunks(cgraph_node*)
/home/marxin/BIG/Programming/gcc/gcc/cgraphclones.c:356
0x961d23 cgraph_node::create_clone(tree_node*, long, int, bool,
vec<cgraph_edge*, va_heap, vl_ptr>, bool, cgraph_node*, bitmap_head*)
/home/marxin/BIG/Programming/gcc/gcc/cgraphclones.c:477
0x962063 cgraph_node::create_virtual_clone(vec<cgraph_edge*, va_heap, vl_ptr>,
vec<ipa_replace_map*, va_gc, vl_embed>*, bitmap_head*, char const*)
/home/marxin/BIG/Programming/gcc/gcc/cgraphclones.c:578
0x1404bd7 create_specialized_node
/home/marxin/BIG/Programming/gcc/gcc/ipa-cp.c:3463
0x14065cd decide_whether_version_node
/home/marxin/BIG/Programming/gcc/gcc/ipa-cp.c:4382
0x14065cd ipcp_decision_stage
/home/marxin/BIG/Programming/gcc/gcc/ipa-cp.c:4494
0x14065cd ipcp_driver
/home/marxin/BIG/Programming/gcc/gcc/ipa-cp.c:4608
0x14065cd execute
/home/marxin/BIG/Programming/gcc/gcc/ipa-cp.c:4698
This issues is fixed by:
SVN revision: 238086
Author: ienkovich
gcc/
PR ipa/71624
* ipa-inline-analysis.c (compute_inline_parameters): Set
local.can_change_signature to false for intrumentation
thunk callees.
gcc/testsuite/
PR ipa/71624
* g++.dg/pr71624.C: New test.
And was backported to 6 branch as r238295. Can you please verify that this
patch fixes your problem?
Thanks,
Martin
>From gcc-bugs-return-559070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:45:47 2017
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Subject: [Bug testsuite/80220] New: relative line numbers don't work when put between braces
Date: Mon, 27 Mar 2017 12:45:00 -0000
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Bug ID: 80220
Summary: relative line numbers don't work when put between
braces
Product: gcc
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Consider src/gcc/testsuite/gcc.dg/990506-0.c:
...
$ cat -n 990506-0.c
1 /* Verify that a diagnostic is issued without crashing due to
2 --enable-checking catching a bug in the C front end. */
3 /* { dg-do compile } */
4 x()
5 {
6 foo (i);
7 /* { dg-error "undeclared" "undeclared-variable message" { target
*-*-* } { 6 } } */
8 /* { dg-message "function it appears in" "reminder message" { target
*-*-* } { 6 } } */
9 }
...
When we rewrite the test to use relative line numbers:
...
diff --git a/gcc/testsuite/gcc.dg/990506-0.c b/gcc/testsuite/gcc.dg/990506-0.c
index 3cd3be3..08ba856 100644
--- a/gcc/testsuite/gcc.dg/990506-0.c
+++ b/gcc/testsuite/gcc.dg/990506-0.c
@@ -4,6 +4,6 @@
x()
{
foo (i);
- /* { dg-error "undeclared" "undeclared-variable message" { target *-*-* } {
6 } } */
- /* { dg-message "function it appears in" "reminder message" { target *-*-* }
{ 6 } } */
+ /* { dg-error "undeclared" "undeclared-variable message" { target *-*-* } {
.-1 } } */
+ /* { dg-message "function it appears in" "reminder message" { target *-*-* }
{ .-2 } } */
}
...
we run into trouble:
...
ERROR: gcc.dg/990506-0.c: expected integer but got " .-1 " for " dg-error 7
"undeclared" "undeclared-variable message" { target *-*-* } { .-1 } "
UNRESOLVED: gcc.dg/990506-0.c: expected integer but got " .-1 " for " dg-error
7 "undeclared" "undeclared-variable message" { target *-*-* } { .-1 } "
...
The problem is that the relative line number is written between braces, which
results in whitespace before and after the number, and the relative line number
handling in process-message doesn't handle that whitespace well.
>From gcc-bugs-return-559071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:46:58 2017
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 41056
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41056&action=edit
tentative patch
>From gcc-bugs-return-559072-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:47:01 2017
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Subject: [Bug tree-optimization/80218] [6/7 Regression] tree-call-cdce does not update block frequencies
Date: Mon, 27 Mar 2017 12:47:00 -0000
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--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
A simple test case is:
#include <math.h>
void
f (float *x)
{
x[0] = sqrtf (x[0]);
}
which ought to spill x only when a call to sqrtf is needed.
>From gcc-bugs-return-559073-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:48:55 2017
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Subject: [Bug tree-optimization/80198] [6/7 Regression] does not vectorize generic inplace integer operation
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--- Comment #5 from Julian Taylor <jtaylor.debian at googlemail dot com> ---
I have been searching for a workaround as this has pretty bad performance
impact in my usecase. I found that putting this into the inplace conditional
#pragma GCC ivdep
allows it to be vectorized again with gcc 6 and 7. It should be fine as inplace
is no dependence in my case.
I'll adapt my code to use this, but it would still be great when the regression
could get fixed.
>From gcc-bugs-return-559074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:50:01 2017
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Subject: [Bug tree-optimization/80198] [6/7 Regression] does not vectorize generic inplace integer operation
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
So this is another case where the conditional propagation happens so that
if (a == b)
{
... = deref a;
... = deref b;
}
turns into
if (a == b)
{
... = deref b;
... = deref a;
}
which is of course not sensible. Having both a = b and b = a recorded
as copies breaks the lattices canonical value.
The original bug would need to have been fixed by recording equivalency
sets or by doing more expensive lookups and knowing a backmapping,
SSA value -> SSA name list.
>From gcc-bugs-return-559075-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 12:52:21 2017
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Subject: [Bug tree-optimization/80181] [7 Regression] ICE in set_lattice_value, at tree-ssa-ccp.c:505
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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.
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Subject: [Bug tree-optimization/80181] [7 Regression] ICE in set_lattice_value, at tree-ssa-ccp.c:505
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80181
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Mar 27 12:52:13 2017
New Revision: 246500
URL: https://gcc.gnu.org/viewcvs?rev=246500&root=gcc&view=rev
Log:
2017-03-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/80181
* tree-ssa-ccp.c (likely_value): UNDEFINED ^ X is UNDEFINED.
* gcc.dg/torture/pr80181.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr80181.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-ccp.c
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Subject: [Bug testsuite/80221] New: Contrib script to rewrite testcase from absolute to relative line numbers
Date: Mon, 27 Mar 2017 12:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80221
Bug ID: 80221
Summary: Contrib script to rewrite testcase from absolute to
relative line numbers
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
It would be good to have a script that rewrites tests to use relative instead
of absolute line numbers in the dg-{warning,error,message,bogus} directives.
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Subject: [Bug testsuite/80221] Contrib script to rewrite testcase from absolute to relative line numbers
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80221
--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 41057
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41057&action=edit
tentative patch
This script tries to rewrite all tests, but that's not entirely supported yet.
Known error causes:
- PR80219 relative line numbers only working if gcc_{error,warning}_prefix
defined
- PR80220 relative line numbers don't work when put between braces
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Subject: [Bug target/24012] [5/6/7 regression] #define _POSIX_C_SOURCE breaks #include <iostream>
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|7.0 |8.0
--- Comment #19 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Gerald Pfeifer from comment #4)
> Historically, on some systems one had to define _POSIX_C_SOURCE to get at
> fileno(), which has been used by code generated by flex() and probably
> others.
Yes, but you don't have to define it to 1. If you define _POSIX_C_SOURCE to
199506L or set _XOPEN_SOURCE to 500 then I think the functions we use are
available, as well as fileno.
>From gcc-bugs-return-559080-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 13:05:31 2017
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Subject: [Bug target/24012] [5/6/7 regression] #define _POSIX_C_SOURCE breaks #include <iostream>
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--- Comment #20 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Also, I assume this is only a problem for -std=c++98 or -std=gnu++98, because
if the system headers don't declare those functions for C++11 and later
dialects then that's a bug in those system headers.
>From gcc-bugs-return-559081-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 13:06:48 2017
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Subject: [Bug target/24012] [5/6/7 regression] #define _POSIX_C_SOURCE breaks #include <iostream>
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--- Comment #21 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #19)
> (In reply to Gerald Pfeifer from comment #4)
> > Historically, on some systems one had to define _POSIX_C_SOURCE to get at
> > fileno(), which has been used by code generated by flex() and probably
> > others.
>
> Yes, but you don't have to define it to 1. If you define _POSIX_C_SOURCE to
> 199506L or set _XOPEN_SOURCE to 500 then I think the functions we use are
> available, as well as fileno.
Correction: _POSIX_C_SOURCE=200112L or _XOPEN_SOURCE=600 should declare them.
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 13:18:00 -0000
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--- Comment #59 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 27 Mar 2017, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
>
> --- Comment #58 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> But this seemingly equivalent code doesn't work:
>
> this->functor = static_cast<function_buffer&>(f.functor);
Is function_buffer may_alias? Then it should work unless the
FE messes up via folding.
struct C { int i; }__attribute__((may_alias)) ;
C a, b;
void foo()
{
a = static_cast <C&> (b);
}
in .original (correct):
<<cleanup_point <<< Unknown tree: expr_stmt
(void) (a = *(const struct C & {ref-all}) &b) >>>>>;
in .gimple (wrong-code):
void foo() ()
{
a = b;
}
caused by gimple_fold_indirect_ref_rhs doing
tree
gimple_fold_indirect_ref (tree t)
{
tree ptype = TREE_TYPE (t), type = TREE_TYPE (ptype);
tree sub = t;
tree subtype;
STRIP_NOPS (sub);
subtype = TREE_TYPE (sub);
if (!POINTER_TYPE_P (subtype))
return NULL_TREE;
if (TREE_CODE (sub) == ADDR_EXPR)
{
tree op = TREE_OPERAND (sub, 0);
tree optype = TREE_TYPE (op);
/* *&p => p */
if (useless_type_conversion_p (type, optype))
return op;
some of the transforms properly preserve ptype semantics but most don't
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From: "john.salmon at deshaw dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80137] [6/7 Regression] std::generate_canonical calls its generator a non-constant number of times
Date: Mon, 27 Mar 2017 13:18:00 -0000
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--- Comment #3 from John Salmon <john.salmon at deshaw dot com> ---
It's easy to overthink this. 0.0 is perfectly acceptable, as is any other
_RealType in the range [0, 1.). But since rounding was, presumably, to-nearest
or up, it's slightly disconcerting that 0.0 is neither near nor up from the
"exact" value.
How about:
if (__builtin_expect(__ret >= _RealType(1), 0))
{
#if _GLIBCXX_USE_C99_MATH_TR1
__ret = std::nextafter(_RealType(1), _RealType(0));
#else
__ret = _RealType(1) - std::numeric_limits<_RealType>::epsilon()/2.;
#endif
}
I.e., if there's no nextafter, then use numeric_limits::epsilon() to find the
value just below 1.0.
John Salmon
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Subject: [Bug middle-end/80222] may_alias folded away
Date: Mon, 27 Mar 2017 13:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-03-27
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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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/80222] New: may_alias folded away
Date: Mon, 27 Mar 2017 13:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80222
Bug ID: 80222
Summary: may_alias folded away
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
struct C { int i; }__attribute__((may_alias)) ;
C a, b;
void foo()
{
a = static_cast <C&> (b);
}
is folded away via gimplification / gimple_fold_indirect_ref.
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 13:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
--- Comment #60 from Richard Biener <rguenth at gcc dot gnu.org> ---
-> PR80222
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Subject: [Bug tree-optimization/80216] [7 Regression] Memory hog w/ -O1
Date: Mon, 27 Mar 2017 13:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-27
CC| |law at gcc dot gnu.org
Component|middle-end |tree-optimization
Target Milestone|--- |7.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
derive_equivalencs_from_bit_ior endlessly recurses. Recent regression.
>From gcc-bugs-return-559088-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 13:21:55 2017
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Subject: [Bug tree-optimization/80217] [7 Regression] ICE in set_ssa_name_value (deep recursion in derive_equivalencs_from_bit_ior)
Date: Mon, 27 Mar 2017 13:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
Target Milestone|--- |7.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 80216 ***
>From gcc-bugs-return-559090-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 13:22:11 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 13:22:00 -0000
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--- Comment #61 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #59)
> On Mon, 27 Mar 2017, redi at gcc dot gnu.org wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
> >
> > --- Comment #58 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> > But this seemingly equivalent code doesn't work:
> >
> > this->functor = static_cast<function_buffer&>(f.functor);
>
> Is function_buffer may_alias?
Yes. Here's what I tested:
union function_buffer_members {
void* p;
void(*fp)();
};
union function_buffer {
function_buffer_members members;
char data[sizeof(function_buffer_members)];
} __attribute__((may_alias));
struct function_base {
mutable function_buffer functor;
};
struct function : function_base {
void func(const function& f) {
const function_buffer& aliasing_ref = f.functor;
this->functor = aliasing_ref;
}
};
void blah(function& f1, function& f2)
{
f1.func(f2);
}
The -fdump-tree-optimized dump is:
;; Function void blah(function&, function&) (_Z4blahR8functionS0_,
funcdef_no=1, decl_uid=2315, cgraph_uid=1, symbol_order=1)
void blah(function&, function&) (struct function & f1, struct function & f2)
{
<bb 2> [100.00%]:
# DEBUG this => f1_2(D)
# DEBUG f => f2_3(D)
# DEBUG D#1 => &MEM[(const struct function *)f2_3(D)].D.2297.functor
# DEBUG aliasing_ref => D#1
f1_2(D)->D.2297.functor = MEM[(const union function_buffer &
{ref-all})f2_3(D)];
# DEBUG this => NULL
# DEBUG f => NULL
return;
}
This has {ref-all}.
If I use static_cast:
union function_buffer_members {
void* p;
void(*fp)();
};
union function_buffer {
function_buffer_members members;
char data[sizeof(function_buffer_members)];
} __attribute__((may_alias));
struct function_base {
mutable function_buffer functor;
};
struct function : function_base {
void func(const function& f) {
this->functor = static_cast<const function_buffer&>(f.functor);
}
};
void blah(function& f1, function& f2)
{
f1.func(f2);
}
Then the dump doesn't have {ref-all}:
;; Function void blah(function&, function&) (_Z4blahR8functionS0_,
funcdef_no=1, decl_uid=2314, cgraph_uid=1, symbol_order=1)
void blah(function&, function&) (struct function & f1, struct function & f2)
{
<bb 2> [100.00%]:
# DEBUG this => f1_2(D)
# DEBUG f => f2_3(D)
f1_2(D)->D.2297.functor = MEM[(const struct function
*)f2_3(D)].D.2297.functor;
# DEBUG this => NULL
# DEBUG f => NULL
return;
}
>From gcc-bugs-return-559091-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 13:22:27 2017
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Subject: [Bug tree-optimization/80218] [6/7 Regression] tree-call-cdce does not update block frequencies
Date: Mon, 27 Mar 2017 13:22:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Priority|P3 |P2
Target Milestone|--- |6.4
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80216] [7 Regression] Memory hog w/ -O1
Date: Mon, 27 Mar 2017 13:22:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 80217 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-559094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 13:23:32 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80170] SLP vectorization creates aligned access
Date: Mon, 27 Mar 2017 13:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0.1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk (sofar).
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Subject: [Bug ipa/79776] [7 Regression] ICE on valid code in insert_vi_for_tree, at tree-ssa-structalias.c:2807
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-559093-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 13:23:22 2017
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 13:23:00 -0000
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--- Comment #62 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Jason Merrill from comment #44)
> Created attachment 41048 [details]
> trial patch
>
> Does this fix the issue? I don't have an ARM setup handy for testing.
Yes. I just tried, it and the crash is gone.
However if 3.10/10 does not apply here, then it would be
good to remove the special handling of the char type,
and just look for a union and/or maybe a may_alias
attribute.
>From gcc-bugs-return-559095-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 13:26:10 2017
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Subject: [Bug c++/69549] Named Address Spaces does not compile in C++
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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> ---
(In reply to Thiago Macieira from comment #0)
> It works in C:
>
> $ cat test.c
> __seg_gs char * ptr;
> $ gcc -c test.c && echo Success
> Success
It's documenbted as being a feature in GNU C, and it doesn't say it's also
supported for C++.
> But not in C++:
>
> $ gcc -xc++ -c test.c
> test.c:1:1: error: ‘__seg_gs’ does not name a type
>
> Even though it's advertised as supported:
>
> $ gcc -xc++ -dM -E /dev/null | grep SEG_GS
> #define __SEG_GS 1
That seems persuasive. Either the macro shouldn't be defined or it should be
supported.
>From gcc-bugs-return-559096-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 13:53:22 2017
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Subject: [Bug gcov-profile/80223] New: RFE: Exclude functions from profile instrumentation
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Similarly to no_instrument_function for -finstrument-functions, some users wish
that there be a function attribute to allow users to exclude a function from
being instrumented with -fprofile-generate.
>From gcc-bugs-return-559098-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 14:12:36 2017
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Subject: [Bug gcov-profile/80223] RFE: Exclude functions from profile instrumentation
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Not so easy though as profiling happens after inlining.
>From gcc-bugs-return-559097-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 14:12:15 2017
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Subject: [Bug gcov-profile/80223] RFE: Exclude functions from profile instrumentation
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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-559099-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 14:24:50 2017
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Subject: [Bug gcov-profile/80224] New: gcov -i crashes with two arguments
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Bug ID: 80224
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gcov -i test1.gcda test2.gcda
=> segfault.
Arguments must be given one by one,
documentation is unclear what to expect here.
>From gcc-bugs-return-559100-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 14:32:37 2017
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Subject: [Bug rtl-optimization/80197] pgo dramatically pessimizes scimark2 MonteCarlo benchmark
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to rguenther@suse.de from comment #2)
> I think that if FDO says either the true or false edge is very likely
> then not if-converting the loop is best? Or is a well-predicted
> conditional move as good as a well-predicted if? 10% missed branches
> would be more than
Please note that when if-conversion succeeded through noce_try_addcc, we don't
care about prediction anymore. The conversion converts:
ucomisd %xmm5, %xmm4
jb .L17
.L16:
addl $1, %ebp
.L17:
to:
ucomisd %xmm0, %xmm3 # 195 *cmpiudf/2 [length = 4]
sbbl $-1, %ebx # 196 subsi3_carry/1 [length = 3]
IMO, this conversion should always be performed, as it is always a win.
>From gcc-bugs-return-559101-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 14:45:45 2017
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From: "dmitrii.kuvaiskii@tu-dresden.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80068] [Intel MPX] "internal compiler error" on 483.xalancbmk in SPEC CPU 2006
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--- Comment #2 from Dmitrii Kuvaiskii <dmitrii.kuvaiskii@tu-dresden.de> ---
Thanks, Martin. This patch indeed solves it.
>From gcc-bugs-return-559103-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 14:47:42 2017
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Subject: [Bug other/65530] [meta-bug] -mmpx -fcheck-pointer-bounds failures
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Bug 65530 depends on bug 80068, which changed state.
Bug 80068 Summary: [Intel MPX] "internal compiler error" on 483.xalancbmk in SPEC CPU 2006
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80068
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----------------------------------------------------------------------------
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>From gcc-bugs-return-559102-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 14:47:41 2017
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Subject: [Bug target/80068] [Intel MPX] "internal compiler error" on 483.xalancbmk in SPEC CPU 2006
Date: Mon, 27 Mar 2017 14:47:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Good, thus closing as works for me.
>From gcc-bugs-return-559104-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 15:03:04 2017
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Subject: [Bug testsuite/80092] Add effective-target keywords for unsupported nvptx features
Date: Mon, 27 Mar 2017 15:03:00 -0000
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--- Comment #9 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Mon Mar 27 15:02:21 2017
New Revision: 246503
URL: https://gcc.gnu.org/viewcvs?rev=246503&root=gcc&view=rev
Log:
Backport "Require effective target global_constructor for two testcases"
2017-03-27 Tom de Vries <tom@codesourcery.com>
backport from trunk:
2017-03-24 Tom de Vries <tom@codesourcery.com>
PR testsuite/80092
* gcc.dg/tls/emutls-2.c: Add dg-require-effective-target
global_constructor.
Modified:
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/testsuite/gcc.dg/tls/emutls-2.c
>From gcc-bugs-return-559105-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 15:06:26 2017
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Subject: [Bug tree-optimization/80216] [7 Regression] Memory hog w/ -O1
Date: Mon, 27 Mar 2017 15:06:00 -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> ---
Started with r246187.
>From gcc-bugs-return-559106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 15:12:25 2017
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From: "ian at airs dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/80209] libgo test failure, dir gotest$$ not found
Date: Mon, 27 Mar 2017 15:12:00 -0000
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Ian Lance Taylor <ian at airs dot com> changed:
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--- Comment #1 from Ian Lance Taylor <ian at airs dot com> ---
Well, as you can see the code is doing
mkdir $DIR
cd $DIR
You didn't report any error message from mkdir, so presumably it succeeded.
The script will be running in the TARGET/libgo directory in the build
directory, so the directory should be writable, the mkdir should succeed, and
of course the cd should succeed. I don't know why the directory was removed
immediately after it was created, but I don't see any sign of an underlying
problem in the testsuite.
This is the first I have heard of this problem.
I'll close this as unreproducible, but please reopen if you disagree.
>From gcc-bugs-return-559107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 15:25:34 2017
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Subject: [Bug tree-optimization/80213] [7 Regression] ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:704
Date: Mon, 27 Mar 2017 15:25:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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>From gcc-bugs-return-559108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 15:37:16 2017
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 15:37:00 -0000
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--- Comment #63 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #54)
> > > > --- Comment #51 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
> > > > Doesn't 3.10/10 explicitly say that it is undefined to use a union to
> > > > to move an object representation that is not a member of the union?
> But still the other clause says the storage representation is transfered
> and so you could read into that that no "access" happens and thus
> 3.10/10 doesn't apply.
Right, union copy copies the bytes of the object representation, i.e. memcpy.
(In reply to Richard Biener from comment #50)
> Note that what changed with GCC 7 is only that unions with char members
> no longer behave as alias-set zero but 12.8/16 talks about all unions,
> not just unions with char members.
>
> Now I read comment#14 as that _only_ char[] members (of structs or unions)
> may ever "contain" different dynamic types. Any pointer to a part of
> the standard that singles out char[] that way?
char is special that way because it can be used to access the stored value of
an object of any type (3.10/10.8).
Now that C++17 introduces std::byte for this sort of thing, I hope to
transition away from the permissive aliasing behavior of char.
>From gcc-bugs-return-559109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 15:41:00 2017
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From: "acsawdey at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79449] ppc builtin expansion of strncmp can cross page (4k) boundary where it should not
Date: Mon, 27 Mar 2017 15:40:00 -0000
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--- Comment #3 from acsawdey at gcc dot gnu.org ---
Author: acsawdey
Date: Mon Mar 27 15:40:20 2017
New Revision: 246504
URL: https://gcc.gnu.org/viewcvs?rev=246504&root=gcc&view=rev
Log:
2017-03-27 Aaron Sawdey <acsawdey@linux.vnet.ibm.com>
Backport from trunk
PR target/79449
PR target/79170
* gcc.dg/strncmp-2.c: New. Test strncmp and memcmp builtin expansion
for reading beyond a 4k boundary.
* config/rs6000/rs6000.c (expand_block_compare): Make sure runtime
boundary crossing check and subsequent code generation agree.
* gcc.dg/memcmp-1.c: Improved to catch failures seen in PR 79170.
* config/rs6000/altivec.md (*setb_internal): Rename to setb_signed.
(setb_unsigned) New pattern for setb with CCUNS.
* config/rs6000/rs6000.c (expand_block_compare): Use a different
subfc./subfe sequence to avoid overflow problems. Generate a
shorter sequence with cmpld/setb for power9.
* config/rs6000/rs6000.md (subf<mode>3_carry_dot2): Add a new pattern
for generating subfc. instruction.
(cmpstrsi): Add TARGET_POPCNTD predicate as the generate sequence
now uses this instruction.
* config/rs6000/rs6000-protos.h (expand_strn_compare): Add arg.
* config/rs6000/rs6000.c (expand_strn_compare): Add ability to expand
strcmp. Fix bug where comparison didn't stop with zero byte. Fix
case where N arg is SIZE_MAX.
* config/rs6000/rs6000.md (cmpstrnsi): Args to expand_strn_compare.
(cmpstrsi): Add pattern.
* gcc.dg/memcmp-1.c: New.
* gcc.dg/strncmp-1.c: New.
* config/rs6000/rs6000-protos.h (expand_strn_compare): Declare.
* config/rs6000/rs6000.md (UNSPEC_CMPB): New unspec.
(cmpb<mode>3): pattern for generating cmpb.
(cmpstrnsi): pattern to expand strncmp ().
* config/rs6000/rs6000.opt (mstring-compare-inline-limit): Add a new
target option for controlling how much code inline expansion of
strncmp() will be allowed to generate.
* config/rs6000/rs6000.c (expand_strncmp_align_check): generate code
for runtime page crossing check of strncmp () args.
(expand_strn_compare): Function to do builtin expansion of strncmp ().
* config/i386/i386.md (cmpstrnsi): New test to bail out if neither
string input is a string constant.
* builtins.c (expand_builtin_strncmp): Attempt expansion of strncmp
via cmpstrnsi even if neither string is constant.
Modified:
branches/ibm/gcc-6-branch/gcc/ChangeLog.ibm
branches/ibm/gcc-6-branch/gcc/builtins.c
branches/ibm/gcc-6-branch/gcc/config/i386/i386.md
branches/ibm/gcc-6-branch/gcc/config/rs6000/altivec.md
branches/ibm/gcc-6-branch/gcc/config/rs6000/rs6000-protos.h
branches/ibm/gcc-6-branch/gcc/config/rs6000/rs6000.c
branches/ibm/gcc-6-branch/gcc/config/rs6000/rs6000.md
branches/ibm/gcc-6-branch/gcc/config/rs6000/rs6000.opt
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Subject: [Bug target/79170] [7 regression] memcmp builtin expansion sequence can overflow
Date: Mon, 27 Mar 2017 15:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79170
--- Comment #6 from acsawdey at gcc dot gnu.org ---
Author: acsawdey
Date: Mon Mar 27 15:40:20 2017
New Revision: 246504
URL: https://gcc.gnu.org/viewcvs?rev=246504&root=gcc&view=rev
Log:
2017-03-27 Aaron Sawdey <acsawdey@linux.vnet.ibm.com>
Backport from trunk
PR target/79449
PR target/79170
* gcc.dg/strncmp-2.c: New. Test strncmp and memcmp builtin expansion
for reading beyond a 4k boundary.
* config/rs6000/rs6000.c (expand_block_compare): Make sure runtime
boundary crossing check and subsequent code generation agree.
* gcc.dg/memcmp-1.c: Improved to catch failures seen in PR 79170.
* config/rs6000/altivec.md (*setb_internal): Rename to setb_signed.
(setb_unsigned) New pattern for setb with CCUNS.
* config/rs6000/rs6000.c (expand_block_compare): Use a different
subfc./subfe sequence to avoid overflow problems. Generate a
shorter sequence with cmpld/setb for power9.
* config/rs6000/rs6000.md (subf<mode>3_carry_dot2): Add a new pattern
for generating subfc. instruction.
(cmpstrsi): Add TARGET_POPCNTD predicate as the generate sequence
now uses this instruction.
* config/rs6000/rs6000-protos.h (expand_strn_compare): Add arg.
* config/rs6000/rs6000.c (expand_strn_compare): Add ability to expand
strcmp. Fix bug where comparison didn't stop with zero byte. Fix
case where N arg is SIZE_MAX.
* config/rs6000/rs6000.md (cmpstrnsi): Args to expand_strn_compare.
(cmpstrsi): Add pattern.
* gcc.dg/memcmp-1.c: New.
* gcc.dg/strncmp-1.c: New.
* config/rs6000/rs6000-protos.h (expand_strn_compare): Declare.
* config/rs6000/rs6000.md (UNSPEC_CMPB): New unspec.
(cmpb<mode>3): pattern for generating cmpb.
(cmpstrnsi): pattern to expand strncmp ().
* config/rs6000/rs6000.opt (mstring-compare-inline-limit): Add a new
target option for controlling how much code inline expansion of
strncmp() will be allowed to generate.
* config/rs6000/rs6000.c (expand_strncmp_align_check): generate code
for runtime page crossing check of strncmp () args.
(expand_strn_compare): Function to do builtin expansion of strncmp ().
* config/i386/i386.md (cmpstrnsi): New test to bail out if neither
string input is a string constant.
* builtins.c (expand_builtin_strncmp): Attempt expansion of strncmp
via cmpstrnsi even if neither string is constant.
Modified:
branches/ibm/gcc-6-branch/gcc/ChangeLog.ibm
branches/ibm/gcc-6-branch/gcc/builtins.c
branches/ibm/gcc-6-branch/gcc/config/i386/i386.md
branches/ibm/gcc-6-branch/gcc/config/rs6000/altivec.md
branches/ibm/gcc-6-branch/gcc/config/rs6000/rs6000-protos.h
branches/ibm/gcc-6-branch/gcc/config/rs6000/rs6000.c
branches/ibm/gcc-6-branch/gcc/config/rs6000/rs6000.md
branches/ibm/gcc-6-branch/gcc/config/rs6000/rs6000.opt
>From gcc-bugs-return-559111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 16:07:46 2017
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/77339] [5/6/7 Regression] ICE on invalid C++ code on x86_64-linux-gnu: in cp_parser_type_name, at cp/parser.c:16532
Date: Mon, 27 Mar 2017 16:07:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|5.5 |7.0
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 7.
>From gcc-bugs-return-559112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 16:32:45 2017
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From: "jwjagersma at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/80225] New: ICE when using Ì output operand incorrectly
Date: Mon, 27 Mar 2017 16:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80225
Bug ID: 80225
Summary: ICE when using =cc output operand incorrectly
Product: gcc
Version: 6.3.0
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Invalid code, but the error message is less than helpful. The following
triggers an ICE:
int main()
{
bool z;
int ar;
asm("lar %0, %1;" : "=@ccz"(z), "=r"(ar) : "rm"(0x1234));
if (!z) return -1;
return ar;
}
$ g++ -masm=intel asm_flags.cpp
asm_flags.cpp: In function 'int main()':
asm_flags.cpp:8:1: internal compiler error: in print_reg, at
config/i386/i386.c:16601
}
^
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://sourceforge.net/projects/msys2> for instructions.
Version info:
$ g++ -v
Using built-in specs.
COLLECT_GCC=D:\msys64\mingw64\bin\g++.exe
COLLECT_LTO_WRAPPER=D:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../gcc-6.3.0/configure --prefix=/mingw64
--with-local-prefix=/mingw64/local --build=x86_64-w64-mingw32
--host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32
--with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include
--libexecdir=/mingw64/lib --enable-bootstrap --with-arch=x86-64
--with-tune=generic --enable-languages=c,lto,c++,objc,obj-c++,fortran,ada
--enable-shared --enable-static --enable-libatomic --enable-threads=posix
--enable-graphite --enable-fully-dynamic-string --enable-libstdcxx-time=yes
--disable-libstdcxx-pch --disable-libstdcxx-debug --disable-isl-version-check
--enable-lto --enable-libgomp --disable-multilib --enable-checking=release
--disable-rpath --disable-win32-registry --disable-nls --disable-werror
--disable-symvers --with-libiconv --with-system-zlib --with-gmp=/mingw64
--with-mpfr=/mingw64 --with-mpc=/mingw64 --with-isl=/mingw64
--with-pkgversion='Rev2, Built by MSYS2 project'
--with-bugurl=https://sourceforge.net/projects/msys2 --with-gnu-as
--with-gnu-ld
Thread model: posix
gcc version 6.3.0 (Rev2, Built by MSYS2 project)
>From gcc-bugs-return-559113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 16:34:59 2017
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From: "matz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 16:34:00 -0000
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Michael Matz <matz at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |matz at gcc dot gnu.org
--- Comment #64 from Michael Matz <matz at gcc dot gnu.org> ---
I would find it extremely surprising if in
a = b;
the RHS doesn't constitute an access to the value of object 'b' (even depending
on the type of b). Are you really saying this Jason? (just trying to make
extra
sure)
(e.g. 5.17/2 is saying about the assignment operator, before any
differentiation
between class and non-class types:
"In simple assignment (=), the value of the expression replaces that of the
object referred to by the left operand."
How could it talk about the value of the expression if the RHS doesn't
constitute an access to the value of that expression? While /4 specifies that
the actual assignment is carried out by the copy/move assignment operator and
hence via object representation for unions when implicit (12.8/29), we cannot
simply ignore the above sentence, can we?)
>From gcc-bugs-return-559114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 16:41:35 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 16:41:00 -0000
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--- Comment #65 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Michael Matz from comment #64)
> I would find it extremely surprising if in
>
> a = b;
>
> the RHS doesn't constitute an access to the value of object 'b' (even
> depending on the type of b). Are you really saying this Jason? (just trying
> to make extra
> sure)
It accesses b, but it doesn't access the object stored in b's char[N] member
via placement new.
>From gcc-bugs-return-559115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 16:43:31 2017
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/80197] pgo dramatically pessimizes scimark2 MonteCarlo benchmark
Date: Mon, 27 Mar 2017 16:43:00 -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 #4 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
According to my analysis, this is mostly caused by different inlining decisions
with regards to inlining new_Random_seed into MonteCarlo_integrate. Inlining
happens at profile-generate time, but does not happen at profile-use time.
This appears to throw off edge probabilities, and also prevents the compiler
from seeing that R->haveRange accessed in Random_nextDouble (which is inlined)
is always 0.
Declaring new_Random_seed (which is called once) as 'inline
__attribute__((always_inline))' makes code generation sane again.
>From gcc-bugs-return-559116-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 16:50:46 2017
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From: "mikestump at comcast dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/80221] Contrib script to rewrite testcase from absolute to relative line numbers
Date: Mon, 27 Mar 2017 16:50:00 -0000
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Mike Stump <mikestump at comcast dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mikestump at comcast dot net
--- Comment #2 from Mike Stump <mikestump at comcast dot net> ---
Look forward to incorporating the changes made by the script.
>From gcc-bugs-return-559117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 16:51:23 2017
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 16:51:00 -0000
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--- Comment #66 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Michael Matz from comment #64)
> I would find it extremely surprising if in
>
> a = b;
>
> the RHS doesn't constitute an access to the value of object 'b' (even
> depending on the type of b). Are you really saying this Jason? (just trying
> to make extra sure)
Well, there's a kind of access involved in forming a reference to each of the
members of b. I'm having trouble finding text pertaining to this; the closest
I'm coming up with is in 12.7 [class.cdtor]:
To form a pointer to (or access the value of) a direct non-static member of an
object obj, the construction of obj shall have started and its destruction
shall not have completed, otherwise the computation of the pointer value (or
accessing
the member value) results in undefined behavior.
> (e.g. 5.17/2 is saying about the assignment operator, before any
> differentiation between class and non-class types:
> "In simple assignment (=), the value of the expression replaces that of the
> object referred to by the left operand."
> How could it talk about the value of the expression if the RHS doesn't
> constitute an access to the value of that expression? While /4 specifies that
> the actual assignment is carried out by the copy/move assignment operator
> and hence via object representation for unions when implicit (12.8/29), we
> cannot simply ignore the above sentence, can we?)
The operator semantics described in clause 5 [expr] apply to the built-in
operators, not any overloaded operators. Assignment of classes is always done
by way of an assignment operator function, even if it happens to be trivial and
therefore open-coded as a block copy, so the above doesn't apply to classes.
>From gcc-bugs-return-559118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 16:51:57 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/54063] [5/6/7 regression] on powerpc64 gcc 4.9/5/6/7 generates larger code for global variable accesses than gcc 4.7
Date: Mon, 27 Mar 2017 16:51:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #15 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Well, it would be nice to generate better code for this case again,
there is no reason to resolve this as WONTFIX, there are various ways
this could be done. But it's not going to happen for GCC 7, sure.
>From gcc-bugs-return-559119-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 16:54:32 2017
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/54063] [5/6/7 regression] on powerpc64 gcc 4.9/5/6/7 generates larger code for global variable accesses than gcc 4.7
Date: Mon, 27 Mar 2017 16:54:00 -0000
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--- Comment #16 from Jeffrey A. Law <law at redhat dot com> ---
That's why I changed the target milestone to gcc-8 :-)
>From gcc-bugs-return-559120-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 17:04:47 2017
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Subject: [Bug target/80103] ICE in output_1144, at config/rs6000/vsx.md:2298
Date: Mon, 27 Mar 2017 17:04:00 -0000
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--- Comment #2 from kelvin at gcc dot gnu.org ---
Author: kelvin
Date: Mon Mar 27 17:04:07 2017
New Revision: 246505
URL: https://gcc.gnu.org/viewcvs?rev=246505&root=gcc&view=rev
Log:
gcc/testsuite/ChangeLog:
2017-03-27 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/80103
* gcc.target/powerpc/pr80103-1.c: New test.
gcc/ChangeLog:
2017-03-27 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/80103
* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Edit and
add comments.
* config/rs6000/rs6000.c (rs6000_option_override_internal): Add
special handling for target option conflicts between dform
options (-mpower9-dform, -mpower9-dform-vector,
-mpower9-dform-scalar) and -mno-direct-move.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr80103-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000-c.c
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-559121-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 17:32:30 2017
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From: "matz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 17:32:00 -0000
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--- Comment #67 from Michael Matz <matz at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #66)
> The operator semantics described in clause 5 [expr] apply to the built-in
> operators, not any overloaded operators. Assignment of classes is always
> done by way of an assignment operator function, even if it happens to be
> trivial and therefore open-coded as a block copy, so the above doesn't apply
> to classes.
I think that's at least slippery. If none of 5.18 would apply to class types
at all there would be no need for 5.18/3 (if non-class type) 5.18/4 (if
class-type) 5.18/5 (class objects are special), or 5.18/9.2 (braced-inits for
class objects). So if /2 would have been conditional on "non-class type" as
well, like /3, it wouldn't matter, but so ...
(This is of course only a side-track, I used clause 5 merely because like you
I have difficulties to find a real definition of what constitutes an access
to the value of an object :) )
>From gcc-bugs-return-559122-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 17:56:09 2017
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Subject: [Bug middle-end/80208] DJGPP max object file alignment regression
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--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
The patch submission was
<https://gcc.gnu.org/ml/gcc-patches/2013-11/msg02187.html>. The rationale
there stands, both that as a standard requirement this must be an error or
a pedwarn not a plain warning, and that the alternative to an error would
be generating wrong code (code that does not achieve the alignment
required by the user's program), which is not appropriate. (There's no
way of declaring "alignment preferred but not required", which would be a
case where no error is needed.)
>From gcc-bugs-return-559123-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 18:11:24 2017
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From: "matz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 18:11:00 -0000
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--- Comment #68 from Michael Matz <matz at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #65)
> It accesses b, but it doesn't access the object stored in b's char[N] member
> via placement new.
Okay, let's go with this. So the copying of the union is then defined
(as a memcpy equivalent). Then there's still the question if the following
sequences are valid:
// assume T1 and T2 are some types and new is trivial placement new
union U {T1 a; char b[sizeof T2];} x,y;
new (x.b) T2(); // 1
y = x; // 2
T2 t;
memcpy(&t, y.b, sizeof T2); // 3
t; // 4
y.a; // 5
We have said that (2) is valid, obviously (3) in isolation is valid as well,
but it influences the validity of (4). (5) is invalid as it's not the
active member of the union y (which is instead b).
(4) is valid if y.b contained a T2, which is only the case if (2) transferred
the dynamic type from x.b _and_ (1) was valid to start with and dynamically
typed x.b to be of type T2.
So, it all boils down to if (1) is valid and types x.b to T2, even though it
has a different declared type. For C we say it's not, because char[] is
asymmetric: you can access all types via a char*, but you can't change the
dynamic type of a declared char array to contain arbitrary other things (well,
the ME memory model does cater for this and makes it valid, even though it's
invalid in C).
I guess you're arguing that (1) is valid in C++ and that then due to 3.9/3
and 12.8/29 also (2) and (4) are. I guess it can be defined to be so, but
I wonder what the type of 'x' is after (1)? It can't be T2, because clearly
x.b is valid even if T2 doesn't contain a member 'b'. So it must stay a union,
but in order to transfer the type T2 in (2) it must also contain T2, so is it
the type 'union {T1 a; char b[sizeof T2]; T2 <unnamed>;}' then (conceptually)?
Messy :)
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #69 from rguenther at suse dot de <rguenther at suse dot de> ---
On March 27, 2017 8:11:10 PM GMT+02:00, "matz at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
>
>--- Comment #68 from Michael Matz <matz at gcc dot gnu.org> ---
>(In reply to Jonathan Wakely from comment #65)
>> It accesses b, but it doesn't access the object stored in b's char[N]
>member
>> via placement new.
>
>Okay, let's go with this. So the copying of the union is then defined
>(as a memcpy equivalent). Then there's still the question if the
>following
>sequences are valid:
>
>// assume T1 and T2 are some types and new is trivial placement new
>union U {T1 a; char b[sizeof T2];} x,y;
>new (x.b) T2(); // 1
>y = x; // 2
>T2 t;
>memcpy(&t, y.b, sizeof T2); // 3
>t; // 4
>y.a; // 5
>
>We have said that (2) is valid, obviously (3) in isolation is valid as
>well,
>but it influences the validity of (4). (5) is invalid as it's not the
>active member of the union y (which is instead b).
>
>(4) is valid if y.b contained a T2, which is only the case if (2)
>transferred
>the dynamic type from x.b _and_ (1) was valid to start with and
>dynamically
>typed x.b to be of type T2.
>
>So, it all boils down to if (1) is valid and types x.b to T2, even
>though it
>has a different declared type. For C we say it's not, because char[]
>is
>asymmetric: you can access all types via a char*, but you can't change
>the
>dynamic type of a declared char array to contain arbitrary other things
>(well,
>the ME memory model does cater for this and makes it valid, even though
>it's
>invalid in C).
>
>I guess you're arguing that (1) is valid in C++ and that then due to
>3.9/3
>and 12.8/29 also (2) and (4) are. I guess it can be defined to be so,
>but
>I wonder what the type of 'x' is after (1)? It can't be T2, because
>clearly
>x.b is valid even if T2 doesn't contain a member 'b'. So it must stay
>a union,
>but in order to transfer the type T2 in (2) it must also contain T2, so
>is it
>the type 'union {T1 a; char b[sizeof T2]; T2 <unnamed>;}' then
>(conceptually)?
>Messy :)
As I noted elsewhere union members in C++ seem to be pure convenience and a
union contains implicit members of all types (well, somehow factor in
alignment). Of course Jason argues char[] is special and introduces this but I
can't find text anywhere to support that or require char[] and not, say int[].
Richard.
>From gcc-bugs-return-559125-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 18:38:41 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 18:38:00 -0000
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--- Comment #70 from Michael Matz <matz at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #69)
> As I noted elsewhere union members in C++ seem to be pure convenience and a
> union contains implicit members of all types (well, somehow factor in
> alignment).
Well, the whole introduction of "object representation" is clearly a very bad
idea if you want to avoid the above, but let's assume that the above is really
not intended. So let's wait for answers to the questions and not see darkness
wherever we go :)
>From gcc-bugs-return-559126-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 18:54:21 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/78670] [F03] Incorrect file position with namelist read under DTIO
Date: Mon, 27 Mar 2017 18:54:00 -0000
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--- Comment #5 from janus at gcc dot gnu.org ---
(In reply to Jerry DeLisle from comment #4)
> Janus, the fix for this bug depends on your patch for pr78661. I would like
> to incorporate yours into the solution to this PR if ok with you.
Sure, go ahead. If you think the last version is ok, I can also commit it, so
that you have it out of your back ...
>From gcc-bugs-return-559127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 19:19:42 2017
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Subject: [Bug target/78543] [6 Regression] ICE in push_reload, at reload.c:1349 on powerpc64le-linux-gnu
Date: Mon, 27 Mar 2017 19:19:00 -0000
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--- Comment #22 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Mon Mar 27 19:19:00 2017
New Revision: 246508
URL: https://gcc.gnu.org/viewcvs?rev=246508&root=gcc&view=rev
Log:
[gcc]
2017-03-27 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/78543
* config/rs6000/rs6000.md (bswaphi2_extenddi): Combine bswap
HImode and SImode with zero extend to DImode to one insn.
(bswap<mode>2_extenddi): Likewise.
(bswapsi2_extenddi): Likewise.
(bswaphi2_extendsi): Likewise.
(bswaphi2): Combine bswap HImode and SImode into one insn.
Separate memory insns from swapping register.
(bswapsi2): Likewise.
(bswap<mode>2): Likewise.
(bswaphi2_internal): Delete, no longer used.
(bswapsi2_internal): Likewise.
(bswap<mode>2_load): Split bswap HImode/SImode into separate load,
store, and gpr<-gpr swap insns.
(bswap<mode>2_store): Likewise.
(bswaphi2_reg): Register only splitter, combine with the splitter.
(bswaphi2 splitter): Likewise.
(bswapsi2_reg): Likewise.
(bswapsi2 splitter): Likewise.
(bswapdi2): If we have the LDBRX and STDBRX instructions, split
the insns into load, store, and register/register insns.
(bswapdi2_ldbrx): Likewise.
(bswapdi2_load): Likewise.
(bswapdi2_store): Likewise.
(bswapdi2_reg): Likewise.
[gcc/testsuite]
2017-03-27 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/78543
* gcc.target/powerpc/pr78543.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr78543.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.md
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-559128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 19:26:09 2017
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Subject: [Bug fortran/78670] [F03] Incorrect file position with namelist read under DTIO
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--- Comment #6 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to janus from comment #5)
> (In reply to Jerry DeLisle from comment #4)
> > Janus, the fix for this bug depends on your patch for pr78661. I would like
> > to incorporate yours into the solution to this PR if ok with you.
>
> Sure, go ahead. If you think the last version is ok, I can also commit it,
> so that you have it out of your back ...
yes, OK to commit it if you can adjust the test case appropriately. I will
then be working on adjusting the namelist read things to make make it work.
Please send a note to gfortran list that you have committed per my approval.
>From gcc-bugs-return-559129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 19:36:15 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/78543] [6 Regression] ICE in push_reload, at reload.c:1349 on powerpc64le-linux-gnu
Date: Mon, 27 Mar 2017 19:36:00 -0000
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--- Comment #23 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Mon Mar 27 19:35:35 2017
New Revision: 246509
URL: https://gcc.gnu.org/viewcvs?rev=246509&root=gcc&view=rev
Log:
[gcc]
2017-03-27 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from trunk
2017-03-27 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/78543
* config/rs6000/rs6000.md (bswaphi2_extenddi): Combine bswap
HImode and SImode with zero extend to DImode to one insn.
(bswap<mode>2_extenddi): Likewise.
(bswapsi2_extenddi): Likewise.
(bswaphi2_extendsi): Likewise.
(bswaphi2): Combine bswap HImode and SImode into one insn.
Separate memory insns from swapping register.
(bswapsi2): Likewise.
(bswap<mode>2): Likewise.
(bswaphi2_internal): Delete, no longer used.
(bswapsi2_internal): Likewise.
(bswap<mode>2_load): Split bswap HImode/SImode into separate load,
store, and gpr<-gpr swap insns.
(bswap<mode>2_store): Likewise.
(bswaphi2_reg): Register only splitter, combine with the splitter.
(bswaphi2 splitter): Likewise.
(bswapsi2_reg): Likewise.
(bswapsi2 splitter): Likewise.
(bswapdi2): If we have the LDBRX and STDBRX instructions, split
the insns into load, store, and register/register insns.
(bswapdi2_ldbrx): Likewise.
(bswapdi2_load): Likewise.
(bswapdi2_store): Likewise.
(bswapdi2_reg): Likewise.
[gcc/testsuite]
2017-03-27 Michael Meissner <meissner@linux.vnet.ibm.com>
Back port from trunk
2017-03-27 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/78543
* gcc.target/powerpc/pr78543.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/powerpc/pr78543.c
- copied unchanged from r246508,
trunk/gcc/testsuite/gcc.target/powerpc/pr78543.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/rs6000/rs6000.md
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-559130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 19:39:32 2017
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Mon, 27 Mar 2017 19:39:00 -0000
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--- Comment #71 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Michael Matz from comment #68)
> (In reply to Jonathan Wakely from comment #65)
> > It accesses b, but it doesn't access the object stored in b's char[N] member
> > via placement new.
>
> Okay, let's go with this. So the copying of the union is then defined
> (as a memcpy equivalent). Then there's still the question if the following
> sequences are valid:
>
> // assume T1 and T2 are some types and new is trivial placement new
> union U {T1 a; char b[sizeof T2];} x,y;
> new (x.b) T2(); // 1
> y = x; // 2
> T2 t;
> memcpy(&t, y.b, sizeof T2); // 3
> t; // 4
> y.a; // 5
>
> We have said that (2) is valid, obviously (3) in isolation is valid as well,
N.B. (3) is not valid if T2 isn't trivially copyable. But for the cases we care
about, it is (the code takes a completely different path otherwise).
> but it influences the validity of (4). (5) is invalid as it's not the
> active member of the union y (which is instead b).
>
> (4) is valid if y.b contained a T2, which is only the case if (2) transferred
> the dynamic type from x.b _and_ (1) was valid to start with and dynamically
> typed x.b to be of type T2.
>
> So, it all boils down to if (1) is valid and types x.b to T2, even though it
> has a different declared type.
I don't think it changes the type of x.b, but it does begin the lifetime of an
object of type T2 at that location.
As I see it, the question is whether copying the object representation of that
object to another location means we have another object at the second location.
We all seem to agree that copying the object representation using memcpy *does*
do that. We don't agree whether copying the object representation via an
implicit union copy does that.
I don't see a distinction between copying the object representation via memcpy
or the union copy.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/78543] [6 Regression] ICE in push_reload, at reload.c:1349 on powerpc64le-linux-gnu
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78543
Michael Meissner <meissner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #24 from Michael Meissner <meissner at gcc dot gnu.org> ---
Fixed in the trunk subversion id 246508, and on the GCC 6.x branch in
subversion id 246509.
>From gcc-bugs-return-559132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 19:53:53 2017
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From: "thanm at google dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/80226] New: ICE gimple-expr.c:474 on Go function returning multiple empty struct/array values
Date: Mon, 27 Mar 2017 19:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80226
Bug ID: 80226
Summary: ICE gimple-expr.c:474 on Go function returning
multiple empty struct/array values
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: go
Assignee: ian at airs dot com
Reporter: thanm at google dot com
CC: cmang at google dot com
Target Milestone: ---
Compiling the attached test case with gccgo results in an ICE. Example:
$ go build -compiler gccgo repro.go
# command-line-arguments
In function ‘repro.Test36’:
go1: internal compiler error: in create_tmp_var, at gimple-expr.c:474
0xc2ace4 create_tmp_var(tree_node*, char const*)
../../gcc-trunk/gcc/gimple-expr.c:474
0x8f5f37 Gcc_backend::return_statement(Bfunction*, std::vector<Bexpression*,
std::allocator<Bexpression*> > const&, Location)
../../gcc-trunk/gcc/go/go-gcc.cc:2135
0x96f3b9 Return_statement::do_get_backend(Translate_context*)
../../gcc-trunk/gcc/go/gofrontend/statements.cc:2838
0x968480 Statement::get_backend(Translate_context*)
../../gcc-trunk/gcc/go/gofrontend/statements.cc:142
0x91b0f2 Block::get_backend(Translate_context*)
../../gcc-trunk/gcc/go/gofrontend/gogo.cc:6026
0x96c772 Block_statement::do_get_backend(Translate_context*)
../../gcc-trunk/gcc/go/gofrontend/statements.cc:1850
0x968480 Statement::get_backend(Translate_context*)
../../gcc-trunk/gcc/go/gofrontend/statements.cc:142
0x91b0f2 Block::get_backend(Translate_context*)
../../gcc-trunk/gcc/go/gofrontend/gogo.cc:6026
0x96ff8e If_statement::do_get_backend(Translate_context*)
../../gcc-trunk/gcc/go/gofrontend/statements.cc:3178
0x968480 Statement::get_backend(Translate_context*)
../../gcc-trunk/gcc/go/gofrontend/statements.cc:142
0x91b0f2 Block::get_backend(Translate_context*)
../../gcc-trunk/gcc/go/gofrontend/gogo.cc:6026
0x96c772 Block_statement::do_get_backend(Translate_context*)
../../gcc-trunk/gcc/go/gofrontend/statements.cc:1850
0x968480 Statement::get_backend(Translate_context*)
../../gcc-trunk/gcc/go/gofrontend/statements.cc:142
0x91b0f2 Block::get_backend(Translate_context*)
../../gcc-trunk/gcc/go/gofrontend/gogo.cc:6026
0x9198ef Function::build(Gogo*, Named_object*)
../../gcc-trunk/gcc/go/gofrontend/gogo.cc:5629
0x91ebf0 Named_object::get_backend(Gogo*, std::vector<Bexpression*,
std::allocator<Bexpression*> >&, std::vector<Btype*, std::allocator<Btype*> >&,
std::vector<Bfunction*, std::allocator<Bfunction*> >&)
../../gcc-trunk/gcc/go/gofrontend/gogo.cc:7411
0x90cad1 Gogo::write_globals()
../../gcc-trunk/gcc/go/gofrontend/gogo.cc:1322
0x90679e go_write_globals()
../../gcc-trunk/gcc/go/gofrontend/go.cc:174
0x8fd2e1 go_langhook_parse_file
../../gcc-trunk/gcc/go/go-lang.c:318
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.
This is with trunk gccgo:
$ gccgo --version
gccgo (GCC) 7.0.1 20170322 (experimental)
$
Excerpt from the function:
func Test36(p0 uint64, p1 StructF36S0, p2 uint8, p3 int32, p4 StructF36S1) (r0
StructF36S2, r1 ArrayF36S0E0, r2 ArrayF36S1E0) {
rc0 := StructF36S2{}
rc1 := ArrayF36S0E0{}
rc2 := ArrayF36S1E0{}
if p0 == 0 {
return rc0, rc1, rc2
}
where r0/r1/r2 are all zero-sized arrays or empty structures.
I spent a little while poking around -- from what I can tell there is code
already in Gcc_backend::return_statement designed to catch this case (returning
empty-sized stuff), however it doesn't appear to be working correctly. Line is
if (int_size_in_bytes(TREE_TYPE(result)) == 0)
however this call is returning -1 in this case (since TREE_TYPE(result) is the
void type).
I will work on a fix.
>From gcc-bugs-return-559133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 20:07:41 2017
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Subject: [Bug go/80226] ICE gimple-expr.c:474 on Go function returning multiple empty struct/array values
Date: Mon, 27 Mar 2017 20:07:00 -0000
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--- Comment #1 from Than McIntosh <thanm at google dot com> ---
This seems to do the trick:
diff --git a/gcc/go/go-gcc.cc b/gcc/go/go-gcc.cc
index ed6fc2c6105..62baa91fab8 100644
--- a/gcc/go/go-gcc.cc
+++ b/gcc/go/go-gcc.cc
@@ -2081,7 +2081,8 @@ Gcc_backend::return_statement(Bfunction* bfunction,
// If the result size is zero bytes, we have set the function type
// to have a result type of void, so don't return anything.
// See the function_type method.
- if (int_size_in_bytes(TREE_TYPE(result)) == 0)
+ tree res_type = TREE_TYPE(result);
+ if (res_type == void_type_node || int_size_in_bytes(res_type) == 0)
{
tree stmt_list = NULL_TREE;
for (std::vector<Bexpression*>::const_iterator p = vals.begin();
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #72 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #69)
> As I noted elsewhere union members in C++ seem to be pure convenience and a
> union contains implicit members of all types (well, somehow factor in
> alignment). Of course Jason argues char[] is special and introduces this
> but I can't find text anywhere to support that or require char[] and not,
> say int[].
This is clarified somewhat in C++17, by
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0137r1.html
Note that this wording makes only unsigned char[] special, not signed or plain
char[].
>From gcc-bugs-return-559135-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 20:42:17 2017
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Subject: [Bug c++/69697] incorrect initialization of static flexible array members
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-27
Ever confirmed|0 |1
Known to fail| |5.3.1, 6.3.0, 7.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirming. To make things worse, the program output changes between -O0 and
-O1:
$ (for o in 0 1 2 3; do gcc -O$o -Wall -Wextra y.C && ./a.out; done)
i = 0, j = 3, a = { 2, { 3, 4, } }
i = 3, j = 0, a = { 2, { 3, 4, } }
i = 3, j = 0, a = { 2, { 3, 4, } }
i = 3, j = 0, a = { 2, { 3, 4, } }
>From gcc-bugs-return-559136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 20:49:05 2017
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Subject: [Bug target/80206] ICE in extract_insn, at recog.c:2327
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So far I have:
--- gcc/config/i386/sse.md.jj 2017-03-16 17:18:42.000000000 +0100
+++ gcc/config/i386/sse.md 2017-03-27 21:26:23.570172997 +0200
@@ -7135,19 +7135,22 @@ (define_expand "<extract_type>_vextract<
{
int mask;
mask = INTVAL (operands[2]);
+ rtx dest = operands[0];
- if (MEM_P (operands[0]) && GET_CODE (operands[3]) == CONST_VECTOR)
- operands[0] = force_reg (<ssequartermode>mode, operands[0]);
+ if (MEM_P (operands[0]) && !rtx_equal_p (operands[0], operands[3]))
+ dest = force_reg (<ssequartermode>mode, dest);
if (<MODE>mode == V16SImode || <MODE>mode == V16SFmode)
- emit_insn (gen_avx512f_vextract<shuffletype>32x4_1_mask (operands[0],
+ emit_insn (gen_avx512f_vextract<shuffletype>32x4_1_mask (dest,
operands[1], GEN_INT (mask * 4), GEN_INT (mask * 4 + 1),
GEN_INT (mask * 4 + 2), GEN_INT (mask * 4 + 3), operands[3],
operands[4]));
else
- emit_insn (gen_avx512dq_vextract<shuffletype>64x2_1_mask (operands[0],
+ emit_insn (gen_avx512dq_vextract<shuffletype>64x2_1_mask (dest,
operands[1], GEN_INT (mask * 2), GEN_INT (mask * 2 + 1), operands[3],
operands[4]));
+ if (dest != operands[0])
+ emit_move_insn (operands[0], dest);
DONE;
})
@@ -7161,8 +7164,8 @@ (define_insn "avx512dq_vextract<shufflet
(match_operand:<ssequartermode> 4 "memory_operand" "0")
(match_operand:QI 5 "register_operand" "Yk")))]
"TARGET_AVX512DQ
- && (INTVAL (operands[2]) % 2 == 0)
- && (INTVAL (operands[2]) == INTVAL (operands[3]) - 1)
+ && INTVAL (operands[2]) % 2 == 0
+ && INTVAL (operands[2]) == INTVAL (operands[3]) - 1
&& rtx_equal_p (operands[4], operands[0])"
{
operands[2] = GEN_INT ((INTVAL (operands[2])) >> 1);
@@ -7187,13 +7190,13 @@ (define_insn "avx512f_vextract<shufflety
(match_operand:<ssequartermode> 6 "memory_operand" "0")
(match_operand:QI 7 "register_operand" "Yk")))]
"TARGET_AVX512F
- && ((INTVAL (operands[2]) % 4 == 0)
- && INTVAL (operands[2]) == (INTVAL (operands[3]) - 1)
- && INTVAL (operands[3]) == (INTVAL (operands[4]) - 1)
- && INTVAL (operands[4]) == (INTVAL (operands[5]) - 1))
+ && INTVAL (operands[2]) % 4 == 0
+ && INTVAL (operands[2]) == INTVAL (operands[3]) - 1
+ && INTVAL (operands[3]) == INTVAL (operands[4]) - 1
+ && INTVAL (operands[4]) == INTVAL (operands[5]) - 1
&& rtx_equal_p (operands[6], operands[0])"
{
- operands[2] = GEN_INT ((INTVAL (operands[2])) >> 2);
+ operands[2] = GEN_INT (INTVAL (operands[2]) >> 2);
return "vextract<shuffletype>32x4\t{%2, %1, %0%{%7%}|%0%{%7%}, %1, %2}";
}
[(set_attr "type" "sselog")
@@ -7209,9 +7212,11 @@ (define_insn "<mask_codefor>avx512dq_vex
(match_operand:V8FI 1 "register_operand" "v")
(parallel [(match_operand 2 "const_0_to_7_operand")
(match_operand 3 "const_0_to_7_operand")])))]
- "TARGET_AVX512DQ && (INTVAL (operands[2]) == INTVAL (operands[3]) - 1)"
+ "TARGET_AVX512DQ
+ && INTVAL (operands[2]) % 2 == 0
+ && INTVAL (operands[2]) == INTVAL (operands[3]) - 1"
{
- operands[2] = GEN_INT ((INTVAL (operands[2])) >> 1);
+ operands[2] = GEN_INT (INTVAL (operands[2]) >> 1);
return "vextract<shuffletype>64x2\t{%2, %1,
%0<mask_operand4>|%0<mask_operand4>, %1, %2}";
}
[(set_attr "type" "sselog1")
@@ -7229,11 +7234,12 @@ (define_insn "<mask_codefor>avx512f_vext
(match_operand 4 "const_0_to_15_operand")
(match_operand 5 "const_0_to_15_operand")])))]
"TARGET_AVX512F
- && (INTVAL (operands[2]) == (INTVAL (operands[3]) - 1)
- && INTVAL (operands[3]) == (INTVAL (operands[4]) - 1)
- && INTVAL (operands[4]) == (INTVAL (operands[5]) - 1))"
+ && INTVAL (operands[2]) % 4 == 0
+ && INTVAL (operands[2]) == INTVAL (operands[3]) - 1
+ && INTVAL (operands[3]) == INTVAL (operands[4]) - 1
+ && INTVAL (operands[4]) == INTVAL (operands[5]) - 1"
{
- operands[2] = GEN_INT ((INTVAL (operands[2])) >> 2);
+ operands[2] = GEN_INT (INTVAL (operands[2]) >> 2);
return "vextract<shuffletype>32x4\t{%2, %1,
%0<mask_operand6>|%0<mask_operand6>, %1, %2}";
}
[(set_attr "type" "sselog1")
@@ -7260,9 +7266,10 @@ (define_expand "<extract_type_2>_vextrac
"TARGET_AVX512F"
{
rtx (*insn)(rtx, rtx, rtx, rtx);
+ rtx dest = operands[0];
- if (MEM_P (operands[0]) && GET_CODE (operands[3]) == CONST_VECTOR)
- operands[0] = force_reg (<ssequartermode>mode, operands[0]);
+ if (MEM_P (dest) && !rtx_equal_p (dest, operands[3]))
+ dest = force_reg (<ssehalfvecmode>mode, dest);
switch (INTVAL (operands[2]))
{
@@ -7276,7 +7283,9 @@ (define_expand "<extract_type_2>_vextrac
gcc_unreachable ();
}
- emit_insn (insn (operands[0], operands[1], operands[3], operands[4]));
+ emit_insn (insn (dest, operands[1], operands[3], operands[4]));
+ if (dest != operands[0])
+ emit_move_insn (operands[0], dest);
DONE;
})
@@ -7317,7 +7326,7 @@ (define_insn "vec_extract_lo_<mode><mask
(match_operand:V8FI 1 "nonimmediate_operand" "v,m")
(parallel [(const_int 0) (const_int 1)
(const_int 2) (const_int 3)])))]
- "TARGET_AVX512F && !(MEM_P (operands[0]) && MEM_P (operands[1]))"
+ "TARGET_AVX512F && (<mask_applied> || !(MEM_P (operands[0]) && MEM_P
(operands[1])))"
{
if (<mask_applied> || !TARGET_AVX512VL)
return "vextract<shuffletype>64x4\t{$0x0, %1,
%0<mask_operand2>|%0<mask_operand2>, %1, 0x0}";
but there is more to do.
>From gcc-bugs-return-559137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 20:49:32 2017
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Subject: [Bug c++/80191] diagnostic placeholder "new initializer" must be marked for translation
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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 Jonathan Wakely from comment #4)
> At the very least, "new" shouldn't be translated, because it refers to the
> C++ keyword, which is always spelled "new" and not "neu" or "nouveau" or
> anything else. It's an initializer for a new-expression, not an initializer
> that is newer than some other initializer.
Then, it should be "%<new%> initializer". Keywords should always be quoted:
https://gcc.gnu.org/wiki/DiagnosticsGuidelines#Quoting
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Subject: [Bug c++/80191] diagnostic placeholder "new initializer" must be marked for translation
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
No, not if I'm right that it's referring to new-initializer. The C++ standard
defines a new-expression and a new-initializer, and those are related to the
'new' keyword, but they are not keywords.
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Subject: [Bug gcov-profile/80224] gcov -i crashes with two arguments
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-27
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 #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Mine.
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Subject: [Bug target/80102] [7 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2330
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Mar 27 21:00:35 2017
New Revision: 246511
URL: https://gcc.gnu.org/viewcvs?rev=246511&root=gcc&view=rev
Log:
PR target/80102
* reg-notes.def (REG_CFA_NOTE): Define. Use it for CFA related
notes.
* cfgcleanup.c (reg_note_cfa_p): New array.
(insns_have_identical_cfa_notes): New function.
(old_insns_match_p): Don't cross-jump in between /f
and non-/f instructions. If both i1 and i2 are frame related,
verify all CFA notes, their order and content.
* g++.dg/opt/pr80102.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/opt/pr80102.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfgcleanup.c
trunk/gcc/reg-notes.def
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/80162] [5/6/7 Regression] ICE on invalid code (address of register variable)
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Mar 27 21:07:21 2017
New Revision: 246512
URL: https://gcc.gnu.org/viewcvs?rev=246512&root=gcc&view=rev
Log:
PR middle-end/80162
c-family/
* c-common.c (c_common_mark_addressable_vec): Don't set
TREE_ADDRESSABLE on DECL_HARD_REGISTER.
c/
* c-tree.h (c_mark_addressable): Add array_ref_p argument.
* c-typeck.c (c_mark_addressable): Likewise. Look through
VIEW_CONVERT_EXPR unless array_ref_p and VCE is from VECTOR_TYPE
to ARRAY_TYPE.
(build_array_ref): Pass true as array_ref_p to c_mark_addressable.
cp/
* cp-tree.h (cxx_mark_addressable): Add array_ref_p argument.
* typeck.c (cxx_mark_addressable): Likewise. Look through
VIEW_CONVERT_EXPR unless array_ref_p and VCE is from VECTOR_TYPE
to ARRAY_TYPE.
(cp_build_array_ref): Pass true as array_ref_p to cxx_mark_addressable.
testsuite/
* c-c++-common/pr80162-1.c: New test.
* c-c++-common/pr80162-2.c: New test.
* c-c++-common/pr80162-3.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/pr80162-1.c
trunk/gcc/testsuite/c-c++-common/pr80162-2.c
trunk/gcc/testsuite/c-c++-common/pr80162-3.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-tree.h
trunk/gcc/c/c-typeck.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/80102] [7 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2330
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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.
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Subject: [Bug target/80162] [5/6 Regression] ICE on invalid code (address of register variable)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[5/6/7 Regression] ICE on |[5/6 Regression] ICE on
|invalid code (address of |invalid code (address of
|register variable) |register variable)
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far. Not sure if this isn't too risky for backporting.
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Subject: [Bug target/68028] [5/6/7 regression] Compilation error "lto1: error: target attribute or pragma changes single precision floating point" with LTO on PowerPC
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc-pc-linux |powerpc-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-27
CC| |ebotcazou at gcc dot gnu.org
Known to work| |4.9.3
Summary|Compilation error "lto1: |[5/6/7 regression]
|error: target attribute or |Compilation error "lto1:
|pragma changes single |error: target attribute or
|precision floating point", |pragma changes single
|with "-flto" on different |precision floating point"
|variant of powerpc like |with LTO on PowerPC
|-mcpu=e6500, 8540, 8548, |
|e500mc, e500mc64, e5500. |
|With gcc-5.2.0 while with |
|4.9.3 it is working fine. |
Ever confirmed|0 |1
Known to fail| |5.2.0, 6.3.1
Build|x86_64-pc-linux |
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
We have it too.
>From gcc-bugs-return-559145-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 21:30:55 2017
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Subject: [Bug c++/80227] New: [4.6/5/6/7 Regression] SFINAE ambiguity with a pointer to array argument
Date: Mon, 27 Mar 2017 21:30:00 -0000
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Bug ID: 80227
Summary: [4.6/5/6/7 Regression] SFINAE ambiguity with a pointer
to array argument
Product: gcc
Version: 7.0
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Prior to version 4.6, GCC accepted the well-formed program below. Since
r166453 GCC rejects it because it fails to eliminate the second overload of the
foo template from the overload list. The second overload isn't viable because
substituting int for T results in the second argument to the function having an
invalid type (pointer to an array of excessive size).
$ cat y.C && gcc -S -Wall -Wextra -Wpedantic y.C
template <class T>
int foo (T);
template <class T, class U = T [sizeof (T) - 5]>
int foo (T, U* = 0);
int i = foo (123);
y.C:7:17: error: call of overloaded ‘foo(int)’ is ambiguous
int i = foo (123);
^
y.C:2:5: note: candidate: int foo(T) [with T = int]
int foo (T);
^~~
y.C:5:5: note: candidate: int foo(T, U*) [with T = int; U = int [-1]]
int foo (T, U* = 0);
^~~
Conversely, while prior to r166453 GCC would reject the following invalid
program
template <class T>
int foo (T, int (*)[sizeof (T) - 5] = 0);
int i = foo (123);
with
t.C:4:17: error: no matching function for call to ‘foo(int)’
t.C:2:40: note: candidate is: template<class T> int foo(T, int (*)[(sizeof (T)
- 5)])
GCC 4.6 and later accept it.
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #41057|0 |1
is obsolete| |
--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 41058
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41058&action=edit
tested patch
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--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 41059
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41059&action=edit
Result from running script
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Subject: [Bug fortran/78881] [F03] reading from string with DTIO procedure does not work properly
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ro at gcc dot gnu.org
--- Comment #15 from Rainer Orth <ro at gcc dot gnu.org> ---
The new testcase FAILs on 64-bit Solaris/SPARC:
+FAIL: gfortran.dg/dtio_26.f03 -O0 execution test
+FAIL: gfortran.dg/dtio_26.f03 -O1 execution test
+FAIL: gfortran.dg/dtio_26.f03 -O2 execution test
+FAIL: gfortran.dg/dtio_26.f03 -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions execution test
+FAIL: gfortran.dg/dtio_26.f03 -O3 -g execution test
+FAIL: gfortran.dg/dtio_26.f03 -Os execution test
Thread 2 received signal SIGABRT, Aborted.
[Switching to Thread 1 (LWP 1)]
0xffffffff7f0e6920 in __lwp_sigqueue () from /lib/64/libc.so.1
(gdb) where
#0 0xffffffff7f0e6920 in __lwp_sigqueue () from /lib/64/libc.so.1
#1 0xffffffff7f02949c in raise () from /lib/64/libc.so.1
#2 0xffffffff7eff8174 in abort () from /lib/64/libc.so.1
#3 0xffffffff2d039dc4 in _gfortrani_sys_abort ()
at /vol/gcc/src/hg/trunk/local/libgfortran/runtime/error.c:180
#4 0xffffffff2d11840c in _gfortran_abort ()
at /vol/gcc/src/hg/trunk/local/libgfortran/intrinsics/abort.c:32
#5 0x000000010000236c in p ()
at /vol/gcc/src/hg/trunk/local/gcc/testsuite/gfortran.dg/dtio_26.f03:64
#6 0x00000001000024d8 in main (argc=1, argv=0xffffffff7ffff84c)
at /vol/gcc/src/hg/trunk/local/gcc/testsuite/gfortran.dg/dtio_26.f03:46
#7 0x00000001000014ac in _start ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
#5 0x000000010000236c in p ()
at /vol/gcc/src/hg/trunk/local/gcc/testsuite/gfortran.dg/dtio_26.f03:64
64 if (imsg.ne."End of record") call abort
(gdb) p imsg
$1 = ' ' <repeats 256 times>
Rainer
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Subject: [Bug testsuite/80220] relative line numbers don't work when put between braces
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #41056|0 |1
is obsolete| |
--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 41060
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tested patch
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Subject: [Bug testsuite/80221] Contrib script to rewrite testcase from absolute to relative line numbers
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--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #3)
> Created attachment 41058 [details]
> tested patch
tested in combination with fix for PR80220.
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Subject: [Bug testsuite/80221] Contrib script to rewrite testcase from absolute to relative line numbers
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--- Comment #6 from Mike Stump <mikestump at comcast dot net> ---
Comment on attachment 41059
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41059
Result from running script
The . and .-1, .+1, .-2 forms are fine. The .-62 forms are as problematic as
the original I suspect. I think we should exclude any number greater than some
small int, say, 9. So, .-9 .. .+9 in the new form only. If outside that
range, I think I'd rather punt. The idea is that the absolute number at least
has a line number that in an editor you can go directly to, and it corresponds
with the number in the error messages directly, aiding understanding which one
is referred to without having to ungoop the relative number first.
Let's see if anyone else has any comments. If not, I'd pre-approve the change
with the range reduced.
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Subject: [Bug c++/80228] New: inconsistent handling of ctor initialization of flexible array members
Date: Mon, 27 Mar 2017 23:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80228
Bug ID: 80228
Summary: inconsistent handling of ctor initialization of
flexible array members
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
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G++ is inconsistent in diagnosing equivalent forms of initialization of
flexible array members. The following test case shows that of the four kinds
of initialization it only rejects one. The other three are accepted. Of those
three, only two initializers are diagnosed with -Wpedantic. The one in struct
D, i.e., the initialization of D::a3, is accepted without a warning. As
discussed in bug 69338, GCC also emits incorrect code for the initializers.
GCC should treat equivalent forms of initialization consistently: either it
should accept them all (possibly diagnosing them with a warning, ideally one
distinct from -Wpedantic), or it should reject them all.
$ cat z.C && gcc -S -Wall -Wextra -Wpedantic z.C
struct A { int n, a[]; };
struct B
{
int n = 3;
int a1[] = { 2, 1, 0 }; // rejected (see pr72775)
} b;
struct C
{
A a2 = { 3, { 2, 1, 0 } }; // accepted
} c;
struct D
{
int n, a3[];
D ():
n (3),
a3 {2, 1, 0} { } // silently accepted
} d;
struct E
{
A a4;
E ():
a4 {3, { 2, 1, 0 } } { } // accepted
} e;
z.C:1:21: warning: ISO C++ forbids flexible array member ‘a’ [-Wpedantic]
struct A { int n, a[]; };
^
z.C:6:24: warning: ISO C++ forbids flexible array member ‘a1’ [-Wpedantic]
int a1[] = { 2, 1, 0 }; // rejected (see pr 72775)
^
z.C:6:24: error: initializer for flexible array member ‘int B::a1 []’
z.C:11:27: warning: invalid use of ‘struct A’ with a flexible array member in
‘struct C’ [-Wpedantic]
A a2 = { 3, { 2, 1, 0 } }; // accepted
^
z.C:1:21: note: array member ‘int A::a []’ declared here
struct A { int n, a[]; };
^
z.C:11:27: warning: initialization of a flexible array member [-Wpedantic]
A a2 = { 3, { 2, 1, 0 } }; // accepted
^
z.C:16:13: warning: ISO C++ forbids flexible array member ‘a3’ [-Wpedantic]
int n, a3[];
^
z.C:25:5: warning: invalid use of ‘struct A’ with a flexible array member in
‘struct E’ [-Wpedantic]
A a4;
^~
z.C:1:21: note: array member ‘int A::a []’ declared here
struct A { int n, a[]; };
^
z.C: In constructor ‘E::E()’:
z.C:28:24: warning: initialization of a flexible array member [-Wpedantic]
a4 {3, { 2, 1, 0 } } { } // accepted
^
>From gcc-bugs-return-559153-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 23:14:40 2017
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From: "tobias.netzel at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/71496] Two picbase loads created for libjava code on powerpc-darwin after rev 228022.
Date: Mon, 27 Mar 2017 23:14:00 -0000
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Tobias Netzel <tobias.netzel at googlemail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tobias.netzel at googlemail dot co
| |m
--- Comment #6 from Tobias Netzel <tobias.netzel at googlemail dot com> ---
This fix seems to have had an unwanted sideeffect:
When not compiling with -fno-PIC or -mdynamic-no-pic the compiler for any
compiled function unconditionally saves and restores R31 from/to the stack even
when it's not touched at all.
I've verified that gcc 4.2 (Apple's version), gcc 4.9 and 5.4 don't do that.
But while gcc 4.9 and 5.4 do unconditionally save and restore R31 when -pg is
passed, Apple's gcc 4.2 doesn't even do it then.
Appearantly the interpretation of what Apple meant with the sentence "This
cannot happen with -fPIC because the PIC register (R31) is always "used" in the
sense checked by the consistency check." might need to be revised.
>From gcc-bugs-return-559154-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 23:22:02 2017
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Subject: [Bug c++/80228] inconsistent handling of ctor initialization of flexible array members
Date: Mon, 27 Mar 2017 23:22:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid,
| |rejects-valid
Blocks| |69698
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
This is either accepts-invalid or rejects-valid depending on one's perspective.
The diagnostic to reject the NSDMI was actually introduced to fix pr79363
(pr72775 just extended it to another, similar case).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69698
[Bug 69698] [meta-bug] flexible array members
>From gcc-bugs-return-559155-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 27 23:49:23 2017
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Subject: [Bug testsuite/80221] Contrib script to rewrite testcase from absolute to relative line numbers
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
A more robust solution that wouldn't have to subject to a limit would be to add
an annotation to dg-{error,message,warning} to indicate that the next
dg-{bogus,error,message,warning} directive is meant to be applied to the same
line as the current one. For instance, something like this:
foobar;
/* { dg-warning "warning for foobar" continue }
{ dg-warning "another warning for foobar" continue }
{ dg-error "error for foobar" } */
(For brevity I omitted the comment and the { target ... } parts of the
directives above. It would also be nice to be able to do away with those when
they're not necessary.)
>From gcc-bugs-return-559157-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 00:23:20 2017
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Subject: [Bug libstdc++/80229] [7 Regression] shared_ptr<T> gives an error when is_function<T> is true
Date: Tue, 28 Mar 2017 00:23:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-03-28
Known to work| |6.3.1
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The _M_enable_shared_from_this parameters are only const to save needing to use
remove_const<_Yp>::type to get the non-const type, so not needed. I have a
patch.
>From gcc-bugs-return-559156-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 00:23:01 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80229] New: [7 Regression] shared_ptr<T> gives an error when is_function<T> is true
Date: Tue, 28 Mar 2017 00:23:00 -0000
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Bug ID: 80229
Summary: [7 Regression] shared_ptr<T> gives an error when
is_function<T> is true
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Keywords: rejects-valid
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#include <memory>
struct Foo {};
using FooFn = Foo ();
using FooFnPtr = Foo (*)();
using FooDel = void (*)(FooFnPtr);
static_assert(std::is_same<FooFn*, FooFnPtr>::value, "");
void del(FooFnPtr) {}
Foo fun() { return {}; }
int main() {
std::shared_ptr<FooFn>(&fun, &del);
}
This compiled with previous versions, but since the enable_shared_from_this
refactoring on trunk it results in an error. I don't see anything in the
standard that says it shouldn't work.
The _M_enable_shared_from_this overloads both take const _Yp* and when _Yp is a
function type there's no conversion from _Yp* to const _Yp*.
In file included from
/home/jwakely/gcc/7/include/c++/7.0.1/bits/shared_ptr.h:52:0,
from /home/jwakely/gcc/7/include/c++/7.0.1/memory:81,
from sp.cc:1:
/home/jwakely/gcc/7/include/c++/7.0.1/bits/shared_ptr_base.h: In instantiation
of ‘std::__shared_ptr<_Tp, _Lp>::__shared_ptr(_Yp*, _Deleter) [with _Yp =
Foo(); _Deleter = void (*)(Foo (*)()); <template-parameter-2-3> = void; _Tp =
Foo(); __gnu_cxx::_Lock_policy _Lp = (__gnu_cxx::_Lock_policy)2]’:
/home/jwakely/gcc/7/include/c++/7.0.1/bits/shared_ptr.h:147:37: required from
‘std::shared_ptr<_Tp>::shared_ptr(_Yp*, _Deleter) [with _Yp = Foo(); _Deleter =
void (*)(Foo (*)()); <template-parameter-2-3> = void; _Tp = Foo()]’
sp.cc:13:38: required from here
/home/jwakely/gcc/7/include/c++/7.0.1/bits/shared_ptr_base.h:1090:35: error: no
matching function for call to ‘std::__shared_ptr<Foo(),
(__gnu_cxx::_Lock_policy)2>::_M_enable_shared_from_this_with(Foo (*&)())’
_M_enable_shared_from_this_with(__p);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
/home/jwakely/gcc/7/include/c++/7.0.1/bits/shared_ptr_base.h:1368:2: note:
candidate: template<class _Yp> typename std::enable_if<std::__shared_ptr<_Tp,
_Lp>::__has_esft_base<_Yp>::value>::type std::__shared_ptr<_Tp,
_Lp>::_M_enable_shared_from_this_with(const _Yp*) [with _Yp = _Yp; _Tp = Foo();
__gnu_cxx::_Lock_policy _Lp = (__gnu_cxx::_Lock_policy)2]
_M_enable_shared_from_this_with(const _Yp* __p) noexcept
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/jwakely/gcc/7/include/c++/7.0.1/bits/shared_ptr_base.h:1368:2: note:
template argument deduction/substitution failed:
/home/jwakely/gcc/7/include/c++/7.0.1/bits/shared_ptr_base.h:1090:35: note:
types ‘const _Yp’ and ‘Foo()’ have incompatible cv-qualifiers
_M_enable_shared_from_this_with(__p);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
/home/jwakely/gcc/7/include/c++/7.0.1/bits/shared_ptr_base.h:1376:2: note:
candidate: template<class _Yp> typename std::enable_if<(!
std::__shared_ptr<_Tp, _Lp>::__has_esft_base<_Yp>::value)>::type
std::__shared_ptr<_Tp, _Lp>::_M_enable_shared_from_this_with(const _Yp*) [with
_Yp = _Yp; _Tp = Foo(); __gnu_cxx::_Lock_policy _Lp =
(__gnu_cxx::_Lock_policy)2]
_M_enable_shared_from_this_with(const _Yp*) noexcept
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/jwakely/gcc/7/include/c++/7.0.1/bits/shared_ptr_base.h:1376:2: note:
template argument deduction/substitution failed:
/home/jwakely/gcc/7/include/c++/7.0.1/bits/shared_ptr_base.h:1090:35: note:
types ‘const _Yp’ and ‘Foo()’ have incompatible cv-qualifiers
_M_enable_shared_from_this_with(__p);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
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Subject: [Bug c++/80230] New: error accessing struct member, error says it's size_t, but it is int
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80230
Bug ID: 80230
Summary: error accessing struct member, error says it's size_t,
but it is int
Product: gcc
Version: 6.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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atoi64.cpp:1398:84: error: request for member 'i' in
'vecstruct[vecstructfromi(5ll)]', which is of non-class type 'size_t {aka long
long unsigned int}'
enum{A=5};
...
} else if
(!foundMode&&static_cast<intmax_t>(vecstruct[vecstructfromi(A)].i)==static_cast<intmax_t>(A))
{
i is of type int, not size_t. struct looks like:
struct {int i;intmax_t v;}
>From gcc-bugs-return-559159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 01:24:45 2017
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Subject: [Bug c++/80230] error accessing struct member, error says it's size_t, but it is int
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
You are misunderstanding the error message.
What it is trying to say the type of vecstruct[vecstructfromi(A)] is size_t and
not the struct type you think it is.
>From gcc-bugs-return-559160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 01:43:36 2017
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Subject: [Bug c++/80230] error accessing struct member, error says it's size_t, but it is int
Date: Tue, 28 Mar 2017 01:43:00 -0000
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--- Comment #2 from Jim Michaels <jmichae3 at yahoo dot com> ---
how did I misunderstand the error message? it's pretty clear. the compiler says
the type is size_t when it really should be saying int, and size_t is for x32
an unsigned int and for x64 it's unsigned long long but it's /not/ a signed
int.
I really don't think there is any confusion here.
>From gcc-bugs-return-559161-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 03:25:54 2017
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Subject: [Bug target/80162] [5/6 Regression] ICE on invalid code (address of register variable)
Date: Tue, 28 Mar 2017 03:25:00 -0000
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--- Comment #8 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Tue Mar 28 03:22:25 2017
New Revision: 246517
URL: https://gcc.gnu.org/viewcvs?rev=246517&root=gcc&view=rev
Log:
PR tree-optimization/80162
* tree-ssa-dom.c (derive_equivalences_from_bit_ior): Fix typo in
function name. Limit recursion depth.
(record_temporary_equivalences): Corresponding changes.
PR tree-optimization/80162
* gcc.c-torture/compile/pr80216.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr80216.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-dom.c
>From gcc-bugs-return-559162-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 03:35:19 2017
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Subject: [Bug tree-optimization/80216] [7 Regression] Memory hog w/ -O1
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jeffrey A. Law <law at redhat dot com> ---
Fixed on the trunk.
>From gcc-bugs-return-559163-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 03:39:12 2017
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Subject: [Bug tree-optimization/78496] [7 Regression] Missed opportunities for jump threading
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Jeffrey A. Law <law at redhat dot com> ---
While I've got changes which I think will address the problems in this BZ;
given how late we are in stage4, I'm going to defer to gcc-8.
>From gcc-bugs-return-559164-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 04:01:23 2017
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Subject: [Bug fortran/78881] [F03] reading from string with DTIO procedure does not work properly
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #16 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Rainer Orth from comment #15)
Can you change line:
if (imsg.ne."End of record") call abort
to:
if (imsg.ne."End of record") print *, imsg
and lets see what its saying.
My guess is I may need to initialize something before calling the child I/O
procedure.
>From gcc-bugs-return-559165-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 04:14:18 2017
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Subject: [Bug libfortran/78793] list_read.c: 7 * possible unintended fallthrough ?
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Closing, fixed by:
Done as revision r246507.
>From gcc-bugs-return-559166-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 05:31:14 2017
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Subject: [Bug tree-optimization/80216] [7 Regression] Memory hog w/ -O1
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: law
Date: Tue Mar 28 03:22:25 2017
New Revision: 246517
URL: https://gcc.gnu.org/viewcvs?rev=246517&root=gcc&view=rev
Log:
PR tree-optimization/80162
* tree-ssa-dom.c (derive_equivalences_from_bit_ior): Fix typo in
function name. Limit recursion depth.
(record_temporary_equivalences): Corresponding changes.
PR tree-optimization/80162
* gcc.c-torture/compile/pr80216.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr80216.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-dom.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80231
Bug ID: 80231
Summary: Error missing binary operator before token "("
Product: gcc
Version: 4.8.1
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Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: sbansal at ciena dot com
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My product is being migrating from GCC 4.4.1 to 4.8.1 and while compiling the
existing code with newer tool chain, I am seeing below error :
In file included from
/vobs/optnet_comms/comms_applications/3rdparty/appweb/current/src/mpr/mprLib.c:5:0:
/vobs/optnet_comms/comms_applications/3rdparty/appweb/current/src/mpr/mpr.h:207:74:
error: missing binary operator before token "("
#elif (LINUX || ME_BSD_LIKE) && (LINUX_VERSION_CODE >=
KERNEL_VERSION(2,6,0))
>From gcc-bugs-return-559168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 06:14:07 2017
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Subject: [Bug preprocessor/80231] Error missing binary operator before token "("
Date: Tue, 28 Mar 2017 06:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80231
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Looks like a dup of bug 36453.
>From gcc-bugs-return-559169-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 06:17:28 2017
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/78670] [F03] Incorrect file position with namelist read under DTIO
Date: Tue, 28 Mar 2017 06:17:00 -0000
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--- Comment #7 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Good news, I have this sorted out and working now with Janus patch for the
namelist write portion.
We were calling the child procedure too early in nml_get_obj_data when we
should have called it in nml_read_obj, after nml_get_obj_data has parsed '='
and other variable qualifiers as with any other namelist.
I will post the patch to list after Janus commits the other portion.
>From gcc-bugs-return-559170-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 06:28:58 2017
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Subject: [Bug testsuite/80220] relative line numbers don't work when put between braces
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Tom de Vries <vries at gcc dot gnu.org> changed:
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Keywords| |patch
--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01423.html
>From gcc-bugs-return-559171-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 06:35:26 2017
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From: "sbansal at ciena dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/80231] Error missing binary operator before token "("
Date: Tue, 28 Mar 2017 06:35:00 -0000
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--- Comment #2 from Sumit <sbansal at ciena dot com> ---
(In reply to Andrew Pinski from comment #1)
> Looks like a dup of bug 36453.
Hi Andrew,
yes I did check that and modified the code like below :
#elif (LINUX || ME_BSD_LIKE) && defined(KERNEL_VERSION) &&
(LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
but no help. Am I doing something wrong here?
>From gcc-bugs-return-559172-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 07:20:47 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #73 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 27 Mar 2017, jason at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
>
> --- Comment #72 from Jason Merrill <jason at gcc dot gnu.org> ---
> (In reply to rguenther@suse.de from comment #69)
> > As I noted elsewhere union members in C++ seem to be pure convenience and a
> > union contains implicit members of all types (well, somehow factor in
> > alignment). Of course Jason argues char[] is special and introduces this
> > but I can't find text anywhere to support that or require char[] and not,
> > say int[].
>
> This is clarified somewhat in C++17, by
>
> http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0137r1.html
>
> Note that this wording makes only unsigned char[] special, not signed or plain
> char[].
Ah, I remember seeing this. So this introduces object size as a way
to allow some TBAA to happen. Specifically it forbids creating
a series of float sub-objects inside a char[sizeof(float)*4] sub-object
due to "there is no smaller array object that satisfies these
constraints"(?). One would need to use sth like
struct { unsigned char storage[sizeof(float)]; } st[4];
to work around that "limitation". Not if it's really possible to
take advantage of that size restriction in alias analysis though...
If we'd want to implement sth like this in the middle-end I'd suggest
to force frontends to mark these storage areas in some way.
In the C++ case all unsigned char arrays -- does the "array of N unsigned char"
wording allow for struct C {} to be created within a unsigned char
(no array!) member or has it to be unsigned char[1]?).
I suggest sth like
/* For an ARRAY_TYPE, indicates that when the dynamic type of the storage
it provides differs from the declard type it is still valid to access
it via the declared type or the type of a containing object. */
#define ARRAY_TYPE_IS_STORAGE (NODE) \
(ARRAY_TYPE_CHECK (NODE)->type_common.array_type_is_storage)
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Subject: [Bug target/68028] [5/6/7 regression] Compilation error "lto1: error: target attribute or pragma changes single precision floating point" with LTO on PowerPC
Date: Tue, 28 Mar 2017 07:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Target Milestone|--- |5.5
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Subject: [Bug preprocessor/80231] Error missing binary operator before token "("
Date: Tue, 28 Mar 2017 07:29:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The PR suggests you write
#elif (LINUX || ME_BSD_LIKE) && defined(KERNEL_VERSION)
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
...
#endif
*** This bug has been marked as a duplicate of bug 36453 ***
>From gcc-bugs-return-559175-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 07:29:29 2017
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Subject: [Bug preprocessor/36453] [DR 412] PR36320 breaks boost
Date: Tue, 28 Mar 2017 07:29:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sbansal at ciena dot com
--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 80231 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-559177-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 07:32:00 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80229] [7 Regression] shared_ptr<T> gives an error when is_function<T> is true
Date: Tue, 28 Mar 2017 07:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80229
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Target Milestone|--- |7.0
>From gcc-bugs-return-559176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 07:31:40 2017
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Subject: [Bug c++/80230] error accessing struct member, error says it's size_t, but it is int
Date: Tue, 28 Mar 2017 07:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80230
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The compiler says 'vecstruct[vecstructfromi(5ll)]' is of non-class type
'size_t'.
>From gcc-bugs-return-559178-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 07:32:34 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80227] [5/6/7 Regression] SFINAE ambiguity with a pointer to array argument
Date: Tue, 28 Mar 2017 07:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Target Milestone|--- |5.5
Summary|[4.6/5/6/7 Regression] |[5/6/7 Regression] SFINAE
|SFINAE ambiguity with a |ambiguity with a pointer to
|pointer to array argument |array argument
>From gcc-bugs-return-559179-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 07:35:46 2017
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Subject: [Bug libstdc++/80229] [7 Regression] shared_ptr<T> gives an error when is_function<T> is true
Date: Tue, 28 Mar 2017 07:35:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Mar 28 07:35:04 2017
New Revision: 246520
URL: https://gcc.gnu.org/viewcvs?rev=246520&root=gcc&view=rev
Log:
PR libstdc++/80229 restore support for shared_ptr<function type>
PR libstdc++/80229
* include/bits/shared_ptr_base.h
(__shared_ptr::_M_enable_shared_from_this_with): Change parameters to
non-const and then use remove_cv to get unqualified type.
* testsuite/20_util/enable_shared_from_this/members/const.cc: Don't
cast away constness on object created const.
* testsuite/20_util/shared_ptr/cons/80229.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/20_util/shared_ptr/cons/80229.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/shared_ptr_base.h
trunk/libstdc++-v3/testsuite/20_util/enable_shared_from_this/members/const.cc
>From gcc-bugs-return-559180-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 07:41:59 2017
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #74 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to rguenther@suse.de from comment #73)
>
> Ah, I remember seeing this. So this introduces object size as a way
> to allow some TBAA to happen. Specifically it forbids creating
> a series of float sub-objects inside a char[sizeof(float)*4] sub-object
> due to "there is no smaller array object that satisfies these
> constraints"(?). One would need to use sth like
>
> struct { unsigned char storage[sizeof(float)]; } st[4];
>
I think that is meant differently, but I am not sure if I
understand this kind of english good enough..., the sample uses:
template<typename ...T>
struct AlignedUnion {
alignas(T...) unsigned char data[max(sizeof(T)...)];
};
so that data array is max of sizeof(int) and sizeof(char)
... the more they write the less clear it becomes :)
> to work around that "limitation". Not if it's really possible to
> take advantage of that size restriction in alias analysis though...
>
> If we'd want to implement sth like this in the middle-end I'd suggest
> to force frontends to mark these storage areas in some way.
> In the C++ case all unsigned char arrays -- does the "array of N unsigned
> char"
> wording allow for struct C {} to be created within a unsigned char
> (no array!) member or has it to be unsigned char[1]?).
>
> I suggest sth like
>
> /* For an ARRAY_TYPE, indicates that when the dynamic type of the storage
> it provides differs from the declard type it is still valid to access
> it via the declared type or the type of a containing object. */
> #define ARRAY_TYPE_IS_STORAGE (NODE) \
> (ARRAY_TYPE_CHECK (NODE)->type_common.array_type_is_storage)
>From gcc-bugs-return-559181-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 07:47:01 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Tue, 28 Mar 2017 07:47:00 -0000
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--- Comment #75 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 28 Mar 2017, bernd.edlinger at hotmail dot de wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671
>
> --- Comment #74 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
> (In reply to rguenther@suse.de from comment #73)
> >
> > Ah, I remember seeing this. So this introduces object size as a way
> > to allow some TBAA to happen. Specifically it forbids creating
> > a series of float sub-objects inside a char[sizeof(float)*4] sub-object
> > due to "there is no smaller array object that satisfies these
> > constraints"(?). One would need to use sth like
> >
> > struct { unsigned char storage[sizeof(float)]; } st[4];
> >
>
> I think that is meant differently, but I am not sure if I
> understand this kind of english good enough..., the sample uses:
>
> template<typename ...T>
> struct AlignedUnion {
> alignas(T...) unsigned char data[max(sizeof(T)...)];
> };
>
> so that data array is max of sizeof(int) and sizeof(char)
>
> ... the more they write the less clear it becomes :)
I was thinking about how to arrange for _multiple_ objects to
be constructed inside a memory area, the interesting size clause
seems to require workarounds like above. Otherwise the "array element"
choice doesn't make much sense I guess.
>From gcc-bugs-return-559182-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 07:48:47 2017
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From: "vincenzo.innocente at cern dot ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80232] New: Ofast pessimizes Sparse matmult in scimark2 benchmark on avx platforms
Date: Tue, 28 Mar 2017 07:48:00 -0000
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Bug ID: 80232
Summary: Ofast pessimizes Sparse matmult in scimark2 benchmark
on avx platforms
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: vincenzo.innocente at cern dot ch
Target Milestone: ---
on my machine
after the usual
mkdir scimark2TMP
cd scimark2TMP
wget http://math.nist.gov/scimark2/scimark2_1c.zip .
unzip scimark2_1c.zip
gcc -v
I get
Using built-in specs.
COLLECT_GCC=c++
COLLECT_LTO_WRAPPER=/afs/cern.ch/work/i/innocent/public/w5/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk//configure
--prefix=/afs/cern.ch/user/i/innocent/w5 -enable-languages=c,c++,lto,fortran
--enable-lto -enable-libitm -disable-multilib
Thread model: posix
gcc version 7.0.1 20170326 (experimental) [trunk revision 246485] (GCC)
[innocent@vinavx3 scimark2TMP]$ gcc -O2 -march=haswell *.c -lm
[innocent@vinavx3 scimark2TMP]$ ./a.out 5 | grep "Sparse matmult"
Sparse matmult Mflops: 3271.69 (N=1000, nz=5000)
[innocent@vinavx3 scimark2TMP]$ ./a.out -large 5 | grep "Sparse matmult"
Sparse matmult Mflops: 2946.76 (N=100000, nz=1000000)
[innocent@vinavx3 scimark2TMP]$ gcc -Ofast -march=nehalem *.c -lm
[innocent@vinavx3 scimark2TMP]$ ./a.out 5 | grep "Sparse matmult"
Sparse matmult Mflops: 3281.93 (N=1000, nz=5000)
[innocent@vinavx3 scimark2TMP]$ ./a.out -large 5 | grep "Sparse matmult"
Sparse matmult Mflops: 2859.34 (N=100000, nz=1000000)
[innocent@vinavx3 scimark2TMP]$ gcc -Ofast -march=corei7-avx *.c -lm
[innocent@vinavx3 scimark2TMP]$ ./a.out 5 | grep "Sparse matmult"
Sparse matmult Mflops: 2987.40 (N=1000, nz=5000)
[innocent@vinavx3 scimark2TMP]$ ./a.out -large 5 | grep "Sparse matmult"
Sparse matmult Mflops: 2869.35 (N=100000, nz=1000000)
[innocent@vinavx3 scimark2TMP]$ gcc -Ofast -march=haswell *.c -lm
[innocent@vinavx3 scimark2TMP]$ ./a.out 5 | grep "Sparse matmult"
Sparse matmult Mflops: 2579.52 (N=1000, nz=5000)
[innocent@vinavx3 scimark2TMP]$ ./a.out -large 5 | grep "Sparse matmult"
Sparse matmult Mflops: 2381.40 (N=100000, nz=1000000)
so O2 and sse4.2 are the fastest, avx is already slower, avx2 is dramatically
slower
par of the difference can be due to gather operation as in #57796: not sure the
difference w/r/t O2
interesting to note that on KNL it makes almost not difference (not sure if
this is positive or negative...) with a hint of speedup for the large
problem...
[innocent@vinknl0 scimark2TMP]$ gcc -Ofast -march=knl *.c -lm
[innocent@vinknl0 scimark2TMP]$ ./a.out 5 | grep "Sparse matmult"
./a.out -large 5 | grep "Sparse matmult"
Sparse matmult Mflops: 348.13 (N=1000, nz=5000)
[innocent@vinknl0 scimark2TMP]$ ./a.out -large 5 | grep "Sparse matmult"
Sparse matmult Mflops: 358.67 (N=100000, nz=1000000)
[innocent@vinknl0 scimark2TMP]$ gcc -O2 -march=knl *.c -lm
[innocent@vinknl0 scimark2TMP]$ ./a.out 5 | grep "Sparse matmult"
Sparse matmult Mflops: 329.33 (N=1000, nz=5000)
[innocent@vinknl0 scimark2TMP]$ ./a.out -large 5 | grep "Sparse matmult"
Sparse matmult Mflops: 321.51 (N=100000, nz=1000000)
[innocent@vinknl0 scimark2TMP]$ gcc -Ofast -march=corei7-avx *.c -lm
[innocent@vinknl0 scimark2TMP]$ ./a.out 5 | grep "Sparse matmult"
Sparse matmult Mflops: 343.12 (N=1000, nz=5000)
[innocent@vinknl0 scimark2TMP]$ ./a.out -large 5 | grep "Sparse matmult"
Sparse matmult Mflops: 323.03 (N=100000, nz=1000000)
[innocent@vinknl0 scimark2TMP]$ gcc -Ofast -march=nehalem *.c -lm
./a.out 5 | grep "Sparse matmult"
[innocent@vinknl0 scimark2TMP]$ ./a.out 5 | grep "Sparse matmult"
Sparse matmult Mflops: 343.57 (N=1000, nz=5000)
[innocent@vinknl0 scimark2TMP]$ ./a.out -large 5 | grep "Sparse matmult"
Sparse matmult Mflops: 321.00 (N=100000, nz=1000000)
>From gcc-bugs-return-559183-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 07:53:08 2017
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Subject: [Bug libstdc++/80229] [7 Regression] shared_ptr<T> gives an error when is_function<T> is true
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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> ---
Fixed.
>From gcc-bugs-return-559184-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 07:55:56 2017
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Subject: [Bug c++/80230] error accessing struct member, error says it's size_t, but it is int
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please stop reporting a bug every time your code doesn't compile.
>From gcc-bugs-return-559185-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 08:13:42 2017
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Subject: [Bug sanitizer/80067] [6/7 Regression] ICE in fold_comparison with -fsanitize=undefined
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Mar 28 08:13:04 2017
New Revision: 246521
URL: https://gcc.gnu.org/viewcvs?rev=246521&root=gcc&view=rev
Log:
PR sanitizer/80067
* fold-const.c (fold_comparison): Use protected_set_expr_location
instead of SET_EXPR_LOCATION.
* c-c++-common/ubsan/shift-10.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/ubsan/shift-10.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-559186-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 08:17:03 2017
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Subject: [Bug sanitizer/80067] [6/7 Regression] ICE in fold_comparison with -fsanitize=undefined
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Mar 28 08:16:27 2017
New Revision: 246522
URL: https://gcc.gnu.org/viewcvs?rev=246522&root=gcc&view=rev
Log:
PR sanitizer/80067
* fold-const.c (fold_comparison): Use protected_set_expr_location
instead of SET_EXPR_LOCATION.
* c-c++-common/ubsan/shift-10.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/c-c++-common/ubsan/shift-10.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/fold-const.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug sanitizer/80067] [6/7 Regression] ICE in fold_comparison with -fsanitize=undefined
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-559189-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 08:31:49 2017
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Subject: [Bug ipa/79931] ICE in dump_possible_polymorphic_call_targets with -fdump-ipa-all -O2
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 41061
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41061&action=edit
Verification patch
>From gcc-bugs-return-559188-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 08:31:24 2017
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Subject: [Bug ipa/79931] ICE in dump_possible_polymorphic_call_targets with -fdump-ipa-all -O2
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
I can confirm that, it's not Ubuntu specific, easily reproducible on current
trunk.
Issues is that ODR type graph is built dynamically, starting just with types of
methods. During gimplification of functions, possible_polymorphic_call_targets
is asked and known results are put into polymorphic_call_target_hash. Problem
comes when a type receives a new derived type which can add possible target.
This happens in your test-case.
I prepared a simple patch validating that # of targets does not change during
time in the cache and there's example that fails:
class b
{
protected:
enum
{
c
};
virtual void d (int a) const;
bool e ();
char f;
};
bool
b::e ()
{
d (123);
}
class g : b
{
void
d (int a) const
{
}
};
>From possible 2 targets, new result would be 1. Still it's partial list and
that can probably just make worse decisions.
But still, the inconsistency should be probably handled.
Honza?
>From gcc-bugs-return-559190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 08:33:26 2017
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Subject: [Bug gcov-profile/80223] RFE: Exclude functions from profile instrumentation
Date: Tue, 28 Mar 2017 08:33:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
May I ask you Marek what would be use-case of such attribute? Thanks
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Subject: [Bug testsuite/80221] Contrib script to rewrite testcase from absolute to relative line numbers
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80221
Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tschwinge at gcc dot gnu.org
--- Comment #8 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to Mike Stump from comment #6)
> The . and .-1, .+1, .-2 forms are fine. The .-62 forms are as problematic
> as the original I suspect. I think we should exclude any number greater
> than some small int, say, 9. So, .-9 .. .+9 in the new form only. If
> outside that range, I think I'd rather punt. The idea is that the absolute
> number at least has a line number that in an editor you can go directly to,
> and it corresponds with the number in the error messages directly, aiding
> understanding which one is referred to without having to ungoop the relative
> number first.
I would guess that a lange number of these are actually cases where all the
"dg-*" directives have been assembled at the end of the file? In such cases,
it would perhaps make sense to move them onto or next to the lines they apply
to -- unless that doesn't make sense for other reasons (when they are grouped
together for a reason).
>From gcc-bugs-return-559192-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 08:35:08 2017
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Subject: [Bug testsuite/80221] Contrib script to rewrite testcase from absolute to relative line numbers
Date: Tue, 28 Mar 2017 08:35:00 -0000
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--- Comment #9 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
You could further optimize the script to omit "." locations: if the "dg-*"
directive actually is placed on the appropriate line already.
>From gcc-bugs-return-559194-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 08:39:45 2017
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/78881] [F03] reading from string with DTIO procedure does not work properly
Date: Tue, 28 Mar 2017 08:39:00 -0000
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--- Comment #17 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #16 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
> (In reply to Rainer Orth from comment #15)
>
> Can you change line:
>
> if (imsg.ne."End of record") call abort
>
> to:
>
> if (imsg.ne."End of record") print *, imsg
>
> and lets see what its saying.
Sure. I see
ro@colima 27 >
LD_LIBRARY_PATH=../../../sparc-sun-solaris2.12/sparcv9/libgfortran/.libs
./dtio_26.exe
Program aborted. Backtrace:
Abort
matching the 256 x ' ' printed by gdb.
Rainer
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Subject: [Bug target/80232] Ofast pessimizes Sparse matmult in scimark2 benchmark on avx platforms
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-28
Blocks| |53947
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
So vectorization related. gathers are known to be notoriously slow but
cost-wise they are not properly represented, in this case they are just
accounted as unaligned load...
It would be more appropriate to account them as VMAT_ELEMENTWISE I suppose
(N scalar loads plus gathering into a vector). Thus:
Index: gcc/tree-vect-stmts.c
===================================================================
--- gcc/tree-vect-stmts.c (revision 246500)
+++ gcc/tree-vect-stmts.c (working copy)
@@ -929,7 +929,8 @@ vect_model_store_cost (stmt_vec_info stm
tree vectype = STMT_VINFO_VECTYPE (stmt_info);
/* Costs of the stores. */
- if (memory_access_type == VMAT_ELEMENTWISE)
+ if (memory_access_type == VMAT_ELEMENTWISE
+ || memory_access_type == VMAT_GATHER_SCATTER)
/* N scalar stores plus extracting the elements. */
inside_cost += record_stmt_cost (body_cost_vec,
ncopies * TYPE_VECTOR_SUBPARTS (vectype),
@@ -938,7 +939,8 @@ vect_model_store_cost (stmt_vec_info stm
vect_get_store_cost (dr, ncopies, &inside_cost, body_cost_vec);
if (memory_access_type == VMAT_ELEMENTWISE
- || memory_access_type == VMAT_STRIDED_SLP)
+ || memory_access_type == VMAT_STRIDED_SLP
+ || memory_access_type == VMAT_GATHER_SCATTER)
inside_cost += record_stmt_cost (body_cost_vec,
ncopies * TYPE_VECTOR_SUBPARTS (vectype),
vec_to_scalar, stmt_info, 0, vect_body);
@@ -1056,7 +1058,8 @@ vect_model_load_cost (stmt_vec_info stmt
}
/* The loads themselves. */
- if (memory_access_type == VMAT_ELEMENTWISE)
+ if (memory_access_type == VMAT_ELEMENTWISE
+ || memory_access_type == VMAT_GATHER_SCATTER)
{
/* N scalar loads plus gathering them into a vector. */
tree vectype = STMT_VINFO_VECTYPE (stmt_info);
@@ -1069,7 +1072,8 @@ vect_model_load_cost (stmt_vec_info stmt
&inside_cost, &prologue_cost,
prologue_cost_vec, body_cost_vec, true);
if (memory_access_type == VMAT_ELEMENTWISE
- || memory_access_type == VMAT_STRIDED_SLP)
+ || memory_access_type == VMAT_STRIDED_SLP
+ || memory_access_type == VMAT_GATHER_SCATTER)
inside_cost += record_stmt_cost (body_cost_vec, ncopies, vec_construct,
stmt_info, 0, vect_body);
changes cost-model for haswell from
SparseCompRow.c:37:17: note: Cost model analysis:
Vector inside of loop cost: 13
Vector prologue cost: 25
Vector epilogue cost: 26
Scalar iteration cost: 5
Scalar outside cost: 7
Vector outside cost: 51
prologue iterations: 4
epilogue iterations: 4
Calculated minimum iters for profitability: 10
to
SparseCompRow.c:37:17: note: Cost model analysis:
Vector inside of loop cost: 23
Vector prologue cost: 25
Vector epilogue cost: 26
Scalar iteration cost: 5
Scalar outside cost: 7
Vector outside cost: 51
prologue iterations: 4
epilogue iterations: 4
Calculated minimum iters for profitability: 10
SparseCompRow.c:37:17: note: Runtime profitability threshold = 9
SparseCompRow.c:37:17: note: Static estimate profitability threshold = 15
so no change in overall profitability...
We seem to peel for alignment which makes the runtime cost check quite
expensive:
<bb 6> [12.75%]:
_114 = (unsigned int) rowRp1_34;
_112 = (unsigned int) rowR_33;
niters.6_54 = _114 - _112;
_92 = (long unsigned int) rowR_33;
_91 = _92 * 4;
vectp.7_93 = col_38(D) + _91;
_89 = (unsigned long) vectp.7_93;
_88 = _89 >> 2;
_87 = -_88;
_86 = (unsigned int) _87;
prolog_loop_niters.8_90 = _86 & 7;
_44 = (unsigned int) rowRp1_34;
_43 = (unsigned int) rowR_33;
_27 = _44 - _43;
_26 = _27 + 4294967295;
_25 = prolog_loop_niters.8_90 + 7;
_24 = MAX_EXPR <_25, 8>;
if (_26 < _24)
given that rowRp1 - rowR is 5 for the small case and 10 for the large
runtime profitability is not given for the small and on the border for
the large case... also the col[] setup is so that the accesses to
x are continguous which means gather is overkill here. Of course we have
no way to vectorize it otherwise (we don't "open-code" gather).
My first suggestion would be to split the profitability check from the
prologue niter computation. And of course fix the cost computation like
suggested above.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
>From gcc-bugs-return-559195-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 08:40:52 2017
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Subject: [Bug testsuite/80221] Contrib script to rewrite testcase from absolute to relative line numbers
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--- Comment #10 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #7)
> A more robust solution that wouldn't have to subject to a limit would be to
> add an annotation to dg-{error,message,warning} to indicate that the next
> dg-{bogus,error,message,warning} directive is meant to be applied to the
> same line as the current one. For instance, something like this:
Instead of working "into the future"...
> foobar;
> /* { dg-warning "warning for foobar" continue }
> { dg-warning "another warning for foobar" continue }
> { dg-error "error for foobar" } */
>
> (For brevity I omitted the comment and the { target ... } parts of the
> directives above. It would also be nice to be able to do away with those
> when they're not necessary.)
..., perhaps it's easier to implement that idea the other way round: at the end
of a "dg-*" handling routine, store the current location into a global
variable, and if a later "dg-*" directive uses a "continue" location, use the
value of the global variable instead. That is:
foobar;
/* { dg-warning "warning for foobar" .-1 }
Bla, bla, reasoning.
{ dg-warning "another warning for foobar" continue }
Bla, bla, more reasoning.
{ dg-error "error for foobar" continue } */
>From gcc-bugs-return-559196-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 08:47:11 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/80223] RFE: Exclude functions from profile instrumentation
Date: Tue, 28 Mar 2017 08:47:00 -0000
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
E.g. if you have an application that is usually just busy waiting, waiting for
something to happen, but you're not interested in profiling that function, or
some function runs in a context where it is not safe to call into runtime
support code.
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Subject: [Bug ipa/80104] ICE in initialize_argument_information, at calls.c:1748
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Mar 28 09:01:57 2017
New Revision: 246525
URL: https://gcc.gnu.org/viewcvs?rev=246525&root=gcc&view=rev
Log:
Fix calls.c for a _complex type (PR ipa/80104).
2017-03-28 Martin Liska <mliska@suse.cz>
PR ipa/80104
* cgraphunit.c (cgraph_node::expand_thunk): Mark argument of a
thunk call as DECL_GIMPLE_REG_P when vector or complex type.
2017-03-28 Martin Liska <mliska@suse.cz>
PR ipa/80104
* gcc.dg/ipa/pr80104.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/ipa/pr80104.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cgraphunit.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Tue, 28 Mar 2017 09:03:00 -0000
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--- Comment #76 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
FYI this is also on the same topic:
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3296.html#US27
Question:
"Related to core issue 1027, consider:
int f() {
union U { double d; } u1, u2;
(int&)u1.d = 1;
u2 = u1;
return (int&)u2.d;
}
Does this involve undefined behavior? 3.8/4 seems to say that it's OK to
clobber u1 with an int object. Then union assignment copies the object
representation, possibly creating an int object in u2 and making the return
statement well-defined. If this is well-defined, compilers are significantly
limited in the assumptions they can make about type aliasing. On the other
hand, the variant where U has an array of unsigned char member must be
well-defined in order to support std::aligned_storage."
Proposed Resolution:
"Clarify that this testcase is undefined, but that adding an array of unsigned
char to union U would make it well-defined--if a storage location is allocated
with a particular type, it should be undefined to create an object in that
storage if it would be undefined to access the stored value of the object
through the allocated type."
Disposition:
"REJECTED
Resolving this question was not deemed essential for this revision of the
Standard, but core issues 1116 remains open for possible consideration in a
future revision."
Does this mean that the boost code is still invalid because there
is no array of unsigned char ?
Or does it not count because it was REJECTED ?
>From gcc-bugs-return-559199-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 09:06:39 2017
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Subject: [Bug target/71922] arm: ifuncs are broken in for arm (gcc generates incorrect code in object file)
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |ramana at gcc dot gnu.org
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--- Comment #9 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
This appears to be a binutils issue - please take it up
there.
http://sourceware.org/bugzilla/
>From gcc-bugs-return-559200-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 09:09:14 2017
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Subject: [Bug gcov-profile/80223] RFE: Exclude functions from profile instrumentation
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
I see. Simplest solution is to propagate the attribute to callers, or don't
allow inlining between a pair of function one w/ and second w/o the attribute?
Richi?
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Subject: [Bug tree-optimization/77498] [7 regression] Performance drop after r239414 on spec2000/172mgrid
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #14 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
I don't think arm is a valid target for this given PR80155 was opened as a
consequence of fixing PR77498..
>From gcc-bugs-return-559202-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 09:23:37 2017
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #77 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It was rejected in 2010, but see
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1116 for the later
discussion, and:
"[Adopted at the June, 2016 meeting as document P0137R1.]"
Which Jason already pointed to in Comment 72.
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Subject: [Bug testsuite/78529] [7 Regression] gcc.c-torture/execute/builtins/strcat-chk.c failed with lto/O2
Date: Tue, 28 Mar 2017 09:28:00 -0000
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--- Comment #34 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
This is really a testsuite issue.
>From gcc-bugs-return-559204-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 09:30:54 2017
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Subject: [Bug target/80232] Ofast pessimizes Sparse matmult in scimark2 benchmark on avx platforms
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
--param vect-max-peeling-for-alignment=0 disables peeling for alignment (but
also makes the runtime profitability trigger at 6 loop iterations already).
I suspect gather has a quite high latency and the loop just doesn't have enough
work to compensate for that (given we have two gathers in the loop as well).
We're also using
vect__15.18_120 = VEC_PERM_EXPR <vect__11.16_116, vect__11.16_116, { 4, 5, 6,
7, 4, 5, 6, 7 }>;
for the index vector of the upper half of the gather but the upper half of the
vector is likely ignored and thus a representation with half of the vector
size and using a BIT_FIELD_REF would be more appropriate here.
.L10:
vmovdqa (%r15,%rax), %ymm2
vmovapd %ymm5, %ymm6
vmovapd %ymm5, %ymm7
addl $1, %edi
vgatherdpd %ymm6, (%r9,%xmm2,8), %ymm3
vperm2i128 $17, %ymm2, %ymm2, %ymm2
vmovdqa %xmm2, %xmm4
vgatherdpd %ymm7, (%r9,%xmm4,8), %ymm2
vmulpd 32(%r11,%rax,2), %ymm2, %ymm2
vfmadd231pd (%r11,%rax,2), %ymm3, %ymm2
addq $32, %rax
vaddpd %ymm2, %ymm0, %ymm0
cmpl %edi, %r14d
ja .L10
eventually the x86 cost hook needs to consider overall instruction count to
properly penaltize gather use. I suspect two xmm loads from %r15/%rax
feeding the two gathers would be easier to pipeline. The fma is likely
also pessimizing pipelining.
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Subject: [Bug testsuite/79418] ERROR: gcc.dg/torture/stackalign/builtin-apply-2.c -O0 : syntax error in targe t selector "target arm_hf_eabi || avr-*-* || riscv*-*-*" for "
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--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Fixed I think by r245240
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Subject: [Bug target/80232] Ofast pessimizes Sparse matmult in scimark2 benchmark on avx platforms
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80232
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Depends on| |57796
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The gather issue is a duplicate btw (by yourself), PR57796.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57796
[Bug 57796] AVX2 gather vectorization: code bloat and reduction of performance
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Subject: [Bug middle-end/80222] may_alias folded away
Date: Tue, 28 Mar 2017 10:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80222
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Mar 28 10:10:01 2017
New Revision: 246527
URL: https://gcc.gnu.org/viewcvs?rev=246527&root=gcc&view=rev
Log:
2017-03-28 Richard Biener <rguenther@suse.de>
PR middle-end/80222
* gimple-fold.c (gimple_fold_indirect_ref): Do not touch
TYPE_REF_CAN_ALIAS_ALL references.
* fold-const.c (fold_indirect_ref_1): Likewise.
* g++.dg/pr80222.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/pr80222.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/gimple-fold.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/80222] may_alias folded away
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0.1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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From: "vincenzo.innocente at cern dot ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/57796] AVX2 gather vectorization: code bloat and reduction of performance
Date: Tue, 28 Mar 2017 10:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57796
--- Comment #8 from vincenzo Innocente <vincenzo.innocente at cern dot ch> ---
My understanding of the gather latency is that it essentially corresponds to a
load per cacheline: fast if all items are closeby, slower than scalar loads if
items are all in different cachelines. Not sure how this can be turned in a
"cost model"
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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/80233] New: [7 Regression] ICE in combine_instructions w/ -O2 (and above)
Date: Tue, 28 Mar 2017 10:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80233
Bug ID: 80233
Summary: [7 Regression] ICE in combine_instructions w/ -O2 (and
above)
Product: gcc
Version: 7.0
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Keywords: ice-on-valid-code
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Target: powerpc-*-linux-gnu*
gcc-7.0.0-alpha20170326 snapshot ICEs on the following snippet w/ -O2 (-Os,
-O3, -Ofast):
int xg;
void
t4 (int o9)
{
int it;
if (o9 == 0)
{
int fx;
xg *= it;
if (xg == 0)
it /= 0;
fx = (it != 0) ? (xg < 0) : (xg / o9);
if (fx != 0)
xg = 0;
}
}
% powerpc-e300c3-linux-gnu-gcc-7.0.0-alpha20170326 -O2 -w -c hzfu8xgw.c
hzfu8xgw.c: In function 't4':
hzfu8xgw.c:20:1: internal compiler error: Segmentation fault
}
^
(gdb) where
#0 0x000002aaaba73033 in combine_instructions (nregs=<optimized out>,
f=<optimized out>)
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/combine.c:1258
#1 rest_of_handle_combine ()
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/combine.c:14650
#2 (anonymous namespace)::pass_combine::execute (this=<optimized out>)
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/combine.c:14695
#3 0x000002aaab2d8ec6 in execute_one_pass (pass=pass@entry=0x2aaac493020)
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/passes.c:2465
#4 0x000002aaab2d98b8 in execute_pass_list_1 (pass=0x2aaac493020)
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/passes.c:2554
#5 0x000002aaab2d98ca in execute_pass_list_1 (pass=0x2aaac492480)
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/passes.c:2555
#6 0x000002aaab2d995c in execute_pass_list (fn=<optimized out>,
pass=<optimized out>)
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/passes.c:2565
#7 0x000002aaaaf2a87a in cgraph_node::expand (this=0x3fff72ab000)
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/cgraphunit.c:2038
#8 0x000002aaaaf2c4ca in expand_all_functions ()
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/cgraphunit.c:2174
#9 symbol_table::compile (this=0x3fff7127000)
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/cgraphunit.c:2531
#10 0x000002aaaaf2eb03 in symbol_table::finalize_compilation_unit
(this=0x3fff7127000)
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/cgraphunit.c:2621
#11 0x000002aaab3d9dfb in compile_file ()
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/toplev.c:492
#12 0x000002aaaad4b9c2 in do_compile ()
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/toplev.c:2000
#13 toplev::main (this=0x3ffffffc940, argc=23, argv=0x3ffffffca48)
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/toplev.c:2134
#14 0x000002aaaad4e258 in main (argc=23, argv=0x3ffffffca48)
at
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170326/work/gcc-7-20170326/gcc/main.c:39
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Subject: [Bug target/47847] PowerPC: ICE: -mcpu…40 -meabi -msdata -fno-common -mfloat-gprs=double
Date: Tue, 28 Mar 2017 10:23:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
So, not a bug.
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Subject: [Bug target/47751] Wrong code with -mcpu…40 -mfloat-gprs=double -mspe -Os on PowerPC
Date: Tue, 28 Mar 2017 10:24:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Not a bug.
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #78 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Ah, adopted is the opposite of rejected, fine.
Does this mean that the boost code is still incorrect,
because it is not using an array of unsigned char ?
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Tue, 28 Mar 2017 10:27:00 -0000
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--- Comment #79 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That's a new change for C++17, and I don't think today's GCC will treat it any
differently if it uses unsigned char[] instead of char[].
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Subject: [Bug ada/80117] Standard'Word_Size is wrong for aarch64 ILP32
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--- Comment #15 from Andreas Schwab <schwab at gcc dot gnu.org> ---
Author: schwab
Date: Tue Mar 28 10:29:34 2017
New Revision: 246528
URL: https://gcc.gnu.org/viewcvs?rev=246528&root=gcc&view=rev
Log:
Support for Ada on aarch64 with -mabi=ilp32
PR ada/80117
* system-linux-aarch64-ilp32.ads: New file.
* gcc-interface/Makefile.in (LIBGNAT_TARGET_PAIRS_COMMON): Rename
from LIBGNAT_TARGET_PAIRS.
(LIBGNAT_TARGET_PAIRS_32, LIBGNAT_TARGET_PAIRS_64): Define.
(LIBGNAT_TARGET_PAIRS): Use LIBGNAT_TARGET_PAIRS_COMMON, and
LIBGNAT_TARGET_PAIRS_64 or LIBGNAT_TARGET_PAIRS_32 for -mabi=lp64
or -mabi=ilp32, resp.
Added:
trunk/gcc/ada/system-linux-aarch64-ilp32.ads
Modified:
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/gcc-interface/Makefile.in
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Subject: [Bug target/80232] Ofast pessimizes Sparse matmult in scimark2 benchmark on avx platforms
Date: Tue, 28 Mar 2017 10:32:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
I have (broadwell CPU) with -Ofast -march=native [-mno-avx]
Sparse matmult Mflops: 2481.77 (N=1000, nz=5000) -mno-avx
Sparse matmult Mflops: 2043.19 (N=1000, nz=5000)
Sparse matmult Mflops: 2248.71 (N=100000, nz=1000000) -mno-avx
Sparse matmult Mflops: 1664.08 (N=100000, nz=1000000)
for the small system it's the overhead when not taking the vectorized code-path
at runtime while for the large it is the overhead when taking the vectorized
code-path. With -mno-avx we are not vectorizing the loop.
Note broadwell does not yet reach optimal latency/throughput for gathers
(2 lanes / cycle saturating the two load ports). I don't have a skylake
machine for comparison though.
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Subject: [Bug rtl-optimization/80233] [7 Regression] ICE in combine_instructions w/ -O2 (and above)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug rtl-optimization/45498] Optimisations fail above arbitrary level of complexity
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
At least as far back as 4.9, GCC does not touch the stack in the inner
loop (except for stfiwx insns). Closing as fixed.
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Subject: [Bug ipa/78644] [7 Regression] ICE: SIGSEGV in is_gimple_reg_type with -Og -fipa-cp
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Tue, 28 Mar 2017 10:48:00 -0000
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--- Comment #80 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
but they use just: "mutable char data;"
>From gcc-bugs-return-559221-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 10:52:59 2017
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From: "katsunori.kumatani at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/53383] Allow -mpreferred-stack-boundary=3 on x86-64
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Katsunori Kumatani <katsunori.kumatani at gmail dot com> changed:
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| |m
--- Comment #24 from Katsunori Kumatani <katsunori.kumatani at gmail dot com> ---
I think this bug should be reopened because the current behavior is
restricting. Andy is right. The compiler should be a tool and the developer
using it should be allowed to shoot himself in the foot if that's what he
wants. In this particular case it restricts freedom and the compiler should be
the developer's tool not the other way around.
Simply remove the TARGET_SSE check and let the actual developer decide if he
wants the stack realigned instead of the compiler? There's even an attribute
for that (to force stack realignment). I don't understand why such a check is
even there, it servers NO purpose except to imply that the compiler knows
better than the person using it, which is just wrong -- if someone wants to use
SSE *and* 8-byte aligned stack, then let him do it.
This will simply force GCC to realign the stack if and *only if* it needs to
use an aligned SSE variable on the stack, just as it does with AVX already.
So if 99% of your functions *do not* use SSE, they won't use 16-byte alignment.
For that odd function that does use aligned SSE (or AVX), it will simply
realign the stack to 16 or 32-bytes in that function's prolog. Nothing special
and it won't crash. (as long as you don't call into library functions
obviously)
Just let the developer decide please, without having to recompile a custom
modified GCC to remove that check that screams "I'm the compiler and I know
better than you do what your code needs"...
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
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--- Comment #81 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Bernd Edlinger from comment #80)
> but they use just: "mutable char data;"
No, actually it doesn't, see comment 45. The original testcase that this reprot
came from is https://bugzilla.redhat.com/show_bug.cgi?id=1422456 which uses
Boost 1.63 and that has an array of char. Jakub used the wrong version of Boost
to create the code attached here.
>From gcc-bugs-return-559223-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 11:08:11 2017
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Subject: [Bug ada/80117] Standard'Word_Size is wrong for aarch64 ILP32
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--- Comment #16 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Feel free to backport it onto the 6 branch.
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Subject: [Bug ipa/80205] [5/6/7 Regression] ICE in walk_ssa_copies at ipa-polymorphic-call.c:835
Date: Tue, 28 Mar 2017 11:37:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Mar 28 11:37:22 2017
New Revision: 246530
URL: https://gcc.gnu.org/viewcvs?rev=246530&root=gcc&view=rev
Log:
Handle PHI nodes w/o a argument (PR ipa/80205).
2017-03-28 Martin Liska <mliska@suse.cz>
PR ipa/80205
* g++.dg/ipa/pr80205.C: New test.
2017-03-28 Richard Biener <rguenther@suse.de>
PR ipa/80205
* tree-inline.c (copy_phis_for_bb): Do not create PHI node
without arguments, generate default definition of a SSA name.
Added:
trunk/gcc/testsuite/g++.dg/ipa/pr80205.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-inline.c
>From gcc-bugs-return-559225-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 11:40:12 2017
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Subject: [Bug ipa/80205] [5/6/7 Regression] ICE in walk_ssa_copies at ipa-polymorphic-call.c:835
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed|2017-03-27 00:00:00 |2017-03-28
Known to work| |7.0
Ever confirmed|0 |1
Known to fail| |5.4.0, 6.3.0
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk so far.
>From gcc-bugs-return-559226-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 11:40:53 2017
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Subject: [Bug ipa/80104] ICE in initialize_argument_information, at calls.c:1748
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk so far.
>From gcc-bugs-return-559227-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 11:52:31 2017
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Subject: [Bug sanitizer/79993] [5/6/7 Regression] ICE in tree_to_uhwi, at tree.c:7344
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug sanitizer/80168] [5/6 Regression] ICE in make_decl_rtl, at varasm.c:1311 w/ VLA and -fsanitizedress
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Known to work| |7.0.1
Summary|[5/6/7 Regression] ICE in |[5/6 Regression] ICE in
|make_decl_rtl, at |make_decl_rtl, at
|varasm.c:1311 w/ VLA and |varasm.c:1311 w/ VLA and
|-fsanitize=address |-fsanitize=address
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-559229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 11:54:46 2017
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Subject: [Bug c++/80179] [6/7 Regression] ICE initializing a static local object with flexible array member in verify_ctor_sanity, at cp/constexpr.c:2641
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
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Subject: [Bug target/24012] [5/6/7 regression] #define _POSIX_C_SOURCE breaks #include <iostream>
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-559233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 12:09:18 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Tue, 28 Mar 2017 12:09:00 -0000
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--- Comment #82 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, for the attached patch it would fail to handle the case of passing the
aggregate by value and the inliner introducing the aggregate copy:
inline void* operator new(__SIZE_TYPE__, void* __p) { return __p; }
struct X { union { int i; char s[4]; } u; };
static float foo (X y)
{
return reinterpret_cast <float &>(y.u.s);
}
int main ()
{
X x;
new (&x.u.s) float (1.0);
if (foo (x) != 1.0)
__builtin_abort ();
}
generates at -O2 after inlining:
int main() ()
{
void * D.2385;
float D.2383;
struct X y;
struct X x;
float _7;
bool retval.0_8;
<bb 2> [100.00%]:
MEM[(float *)&x] = 1.0e+0;
y = x;
_7 = MEM[(float &)&y];
...
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Subject: [Bug target/53383] Allow -mpreferred-stack-boundary=3 on x86-64
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--- Comment #25 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Katsunori Kumatani from comment #24)
> I think this bug should be reopened because the current behavior is
> restricting.
[...]
I agree. Let's remove this artificial dependency on -msse.
Patch in testing:
--cut here--
Index: config/i386/i386.c
===================================================================
--- config/i386/i386.c (revision 246531)
+++ config/i386/i386.c (working copy)
@@ -5927,9 +5927,8 @@ ix86_option_override_internal (bool main_args_p,
ix86_preferred_stack_boundary = PREFERRED_STACK_BOUNDARY_DEFAULT;
if (opts_set->x_ix86_preferred_stack_boundary_arg)
{
- int min = (TARGET_64BIT_P (opts->x_ix86_isa_flags)
- ? (TARGET_SSE_P (opts->x_ix86_isa_flags) ? 4 : 3) : 2);
- int max = (TARGET_SEH ? 4 : 12);
+ int min = TARGET_64BIT_P (opts->x_ix86_isa_flags)? 3 : 2;
+ int max = TARGET_SEH ? 4 : 12;
if (opts->x_ix86_preferred_stack_boundary_arg < min
|| opts->x_ix86_preferred_stack_boundary_arg > max)
--cut here--
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From: "tim at array dot ca" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80234] New: ICE in splice_child_die at dwarfout.c:5265
Date: Tue, 28 Mar 2017 13:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80234
Bug ID: 80234
Summary: ICE in splice_child_die at dwarfout.c:5265
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Created attachment 41062
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preprocessed source
In the fedora rawhide GCC 7.0.1-0.12 build (x86_64), I'm getting an ICE in the
following code when generating debug info:
class foo
{
public:
static constexpr const char name_str[] = "foo";
virtual ~foo();
};
constexpr const char foo::name_str[];
foo::~foo()
{
}
% /usr/bin/c++ -g -std=gnu++17 -Wall -Wextra -o /home/tim/tmp/foo.o -c
/home/tim/Projects/ugp/src/ugp/UGF/Core/src/component/foo.cc
/home/tim/Projects/ugp/src/ugp/UGF/Core/src/component/foo.cc:18:1: internal
compiler error: in splice_child_die, at dwarf2out.c:5265
The code snippet is about as minimal as I can get it and still reproduce the
error. If I make the destructor non-virtual or get rid of the definition of
foo::name_str, the error disappears.
>From gcc-bugs-return-559236-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 13:14:35 2017
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Subject: [Bug c++/80234] [7 Regression] ICE in splice_child_die at dwarfout.c:5265
Date: Tue, 28 Mar 2017 13:14:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-28
CC| |jakub at gcc dot gnu.org,
| |mpolacek at gcc dot gnu.org
Target Milestone|--- |7.0
Summary|ICE in splice_child_die at |[7 Regression] ICE in
|dwarfout.c:5265 |splice_child_die at
| |dwarfout.c:5265
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r241753.
>From gcc-bugs-return-559237-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 13:20:25 2017
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From: "mexas at bristol dot ac.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80235] New: ICE: coarrays, submodule
Date: Tue, 28 Mar 2017 13:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80235
Bug ID: 80235
Summary: ICE: coarrays, submodule
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41063&action=edit
module file
$ caf -c m.f90
$ caf -c sm.f90
sm.f90:22:0:
maxfe = size( cgca_pfem_centroid_tmp%r, dim=2 )
internal compiler error: Segmentation fault
m.f90 - module, sm.f90 - submodule, both attached.
>From gcc-bugs-return-559238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 13:21:01 2017
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Subject: [Bug fortran/80235] ICE: coarrays, submodule
Date: Tue, 28 Mar 2017 13:21:00 -0000
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--- Comment #1 from Anton Shterenlikht <mexas at bristol dot ac.uk> ---
Created attachment 41064
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41064&action=edit
submodule file
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Subject: [Bug tree-optimization/79390] [7 Regression] 10% performance drop in SciMark2 LU after r242550
Date: Tue, 28 Mar 2017 13:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79390
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |6.3.1
Target Milestone|--- |7.0
Summary|10% performance drop in |[7 Regression] 10%
|SciMark2 LU after r242550 |performance drop in
| |SciMark2 LU after r242550
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
On more recent trunk -fno-split-paths makes only a tiny difference (4882 vs.
4779 Mflops) while -ftree-loop-if-convert still results in 5432 Mflops. GCC 6
scores 5523 Mflops for me (-O3 -march=native on a Broadwell CPU).
Marking as regression.
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From: "mexas at bristol dot ac.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80235] ICE: coarrays, submodule
Date: Tue, 28 Mar 2017 13:22:00 -0000
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--- Comment #2 from Anton Shterenlikht <mexas at bristol dot ac.uk> ---
Can be triggered also with gfortran7 directly:
$ gfortran7 -c -fcoarray=lib m.f90
$ gfortran7 -c -fcoarray=lib sm.f90
sm.f90:22:0:
maxfe = size( cgca_pfem_centroid_tmp%r, dim=2 )
internal compiler error: Segmentation fault
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From: "dev@dominik-schmidt.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80236] New: ARM NEON: Crash in std::map
Date: Tue, 28 Mar 2017 13:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80236
Bug ID: 80236
Summary: ARM NEON: Crash in std::map
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dev@dominik-schmidt.de
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Created attachment 41065
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41065&action=edit
part 1 of minimal example
Hey,
we are facing a crash when compiling the attached cpp files with:
`arm-oe-linux-gnueabi-g++ -march=armv7ve -marm -mfpu=neon-vfpv4
-mfloat-abi=hard -mcpu=cortex-a7
--sysroot=/home/build/openembedded_sdk/tmp/sysroots/raspberrypi3 -O0 ../bar.cpp
../main.cpp -o crashTest`
The crash only happens with optimizations disabled, it already doesn't happen
anymore with `-O1`.
Also we could not trigger the faulty behavior in a single file, so this example
is really the bare minimum we could find.
gcc is installed from openembedded standard repository in version 6.3.0. Full
`--version --verbose` output is provided via attachments.
We could also reproduce this for another ARM target with GCC 5.4. I'm currently
lacking more information on that myself, but I will try to provide it later on.
The bt for 6.3 looks like this:
(gdb) run
Starting program: /tmp/crashTest
Program received signal SIGSEGV, Segmentation fault.
0x000121bc in void __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<int
const, double> > >::construct<std::pair<int const, double>, std::pair<int
const, double> const&>(std::pair<int const, double>*, std::pair<int const,
double> const&)
()
(gdb) bt
#0 0x000121bc in void
__gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<int const, double> >
>::construct<std::pair<int const, double>, std::pair<int const, double>
const&>(std::pair<int const, double>*, std::pair<int const, double> const&) ()
#1 0x000120e0 in void
std::allocator_traits<std::allocator<std::_Rb_tree_node<std::pair<int const,
double> > > >::construct<std::pair<int const, double>, std::pair<int const,
double> const&>(std::allocator<std::_Rb_tree_node<std::pair<int const, double>
> >&, std::pair<int const, double>*, std::pair<int const, double> const&) ()
#2 0x00011ffc in void std::_Rb_tree<int, std::pair<int const, double>,
std::_Select1st<std::pair<int const, double> >, std::less<int>,
std::allocator<std::pair<int const, double> >
>::_M_construct_node<std::pair<int const, double>
const&>(std::_Rb_tree_node<std::pair<int const, double> >*, std::pair<int
const, double> const&) ()
#3 0x00011df0 in std::_Rb_tree_node<std::pair<int const, double> >*
std::_Rb_tree<int, std::pair<int const, double>, std::_Select1st<std::pair<int
const, double> >, std::less<int>, std::allocator<std::pair<int const, double> >
>::_M_create_node<std::pair<int const, double> const&>(std::pair<int const,
double> const&) ()
#4 0x00011c0c in std::_Rb_tree_node<std::pair<int const, double> >*
std::_Rb_tree<int, std::pair<int const, double>, std::_Select1st<std::pair<int
const, double> >, std::less<int>, std::allocator<std::pair<int const, double> >
>::_Alloc_node::operator()<std::pair<int const, double> const&>(std::pair<int
const, double> const&) const ()
#5 0x00011728 in std::_Rb_tree_iterator<std::pair<int const, double> >
std::_Rb_tree<int, std::pair<int const, double>, std::_Select1st<std::pair<int
const, double> >, std::less<int>, std::allocator<std::pair<int const, double> >
>::_M_insert_<std::pair<int const, double> const&, std::_Rb_tree<int,
std::pair<int const, double>, std::_Select1st<std::pair<int const, double> >,
std::less<int>, std::allocator<std::pair<int const, double> >
>::_Alloc_node>(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*,
std::pair<int const, double> const&, std::_Rb_tree<int, std::pair<int const,
double>, std::_Select1st<std::pair<int const, double> >, std::less<int>,
std::allocator<std::pair<int const, double> > >::_Alloc_node&) ()
#6 0x00010f7c in std::_Rb_tree_iterator<std::pair<int const, double> >
std::_Rb_tree<int, std::pair<int const, double>, std::_Select1st<std::pair<int
const, double> >, std::less<int>, std::allocator<std::pair<int const, double> >
>::_M_insert_unique_<std::pair<int const, double> const&, std::_Rb_tree<int,
std::pair<int const, double>, std::_Select1st<std::pair<int const, double> >,
std::less<int>, std::allocator<std::pair<int const, double> >
>::_Alloc_node>(std::_Rb_tree_const_iterator<std::pair<int const, double> >,
std::pair<int const, double> const&, std::_Rb_tree<int, std::pair<int const,
double>, std::_Select1st<std::pair<int const, double> >, std::less<int>,
std::allocator<std::pair<int const, double> > >::_Alloc_node&) ()
#7 0x00010c8c in void std::_Rb_tree<int, std::pair<int const, double>,
std::_Select1st<std::pair<int const, double> >, std::less<int>,
std::allocator<std::pair<int const, double> > >::_M_insert_unique<std::pair<int
const, double> const*>(std::pair<int const, double> const*, std::pair<int
const, double> const*) ()
#8 0x00010a90 in std::map<int, double, std::less<int>,
std::allocator<std::pair<int const, double> >
>::map(std::initializer_list<std::pair<int const, double> >, std::less<int>
const&, std::allocator<std::pair<int const, double> > const&) ()
#9 0x0001227c in main ()
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From: "dev@dominik-schmidt.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80236] ARM NEON: Crash in std::map
Date: Tue, 28 Mar 2017 13:23:00 -0000
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--- Comment #1 from Dominik Schmidt <dev@dominik-schmidt.de> ---
Created attachment 41066
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41066&action=edit
part 2 of minimal example: bar.cpp
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From: "dev@dominik-schmidt.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80236] ARM NEON: Crash in std::map
Date: Tue, 28 Mar 2017 13:25:00 -0000
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--- Comment #2 from Dominik Schmidt <dev@dominik-schmidt.de> ---
Created attachment 41067
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41067&action=edit
g++ --version --verbose
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
Date: Tue, 28 Mar 2017 13:33:00 -0000
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--- Comment #18 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Thomas Preud'homme from comment #17)
> (In reply to rguenther@suse.de from comment #16)
> > On Thu, 23 Mar 2017, thopre01 at gcc dot gnu.org wrote:
> > >
> > > Funnily this led back to the Cortex-M0+ reduced testcase. With the patch in
> > > comment #13 applied we can still see a difference in the push (one register
> > > pushed Vs 0).
> >
> > I can't reproduce zero pushes here I get three with/without
> > -fno-code-hoisting. code hoisting hoists the two loads inside
> > the switch before it so we have
>
> Ooops my apologize, it needs more flags indeed. -O2 -funroll-all-loops shows
> 2 registers pushed Vs 1 when -fno-code-hoisting is added.
Still can't reproduce. I've configured with
/space/rguenther/src/svn/gcc-7-branch/configure --target=arm-suse-linux-gnueabi
--disable-libstdcxx-pch --enable-languages=c,c++
and am using
./cc1 -quiet cortex-m0plus_reproducer.c -O2 -mcpu=cortex-m0plus -mthumb -I
include -fdump-tree-pre-details -fdump-tree-crited -fdump-tree-all
-funroll-all-loops -fno-code-hoisting
seeing 3 pushes:
fn1:
@ args = 0, pretend = 0, frame = 0
@ frame_needed = 0, uses_anonymous_args = 0
movs r3, #0
push {r4, r5, lr}
I see softfp being used, not sure how I could change that (if that's what I'm
missing). Btw, -funroll-all-loops disqualifies this testcase ;)
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Subject: [Bug c++/80095] [5/6/7 Regression] ICE with this pointer in NSDMI
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
In store_init_value, we have
decl: a
type: const struct A &
value: D.2291.p = (void *) &<PLACEHOLDER_EXPR struct A>;, (const struct A &)
&D.2291;
but because type isn't CLASS_TYPE_P, we're not calling replace_placeholders.
We cannot just call replace_placeholders, that would crash, because obj has
type "const struct A &" whereas *t is "<PLACEHOLDER_EXPR struct A>".
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Subject: [Bug c++/80236] ARM NEON: Crash in std::map
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2017-03-28
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Usually this happens when you return a reference to an automatic variable thus
invalidly extend an objects lifetime after destruction.
Did you try -fsanitize=address or -fsanitize=undefined?
>From gcc-bugs-return-559247-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 13:39:17 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
Date: Tue, 28 Mar 2017 13:39:00 -0000
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--- Comment #19 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #18)
> (In reply to Thomas Preud'homme from comment #17)
> > (In reply to rguenther@suse.de from comment #16)
> > > On Thu, 23 Mar 2017, thopre01 at gcc dot gnu.org wrote:
> > > >
> > > > Funnily this led back to the Cortex-M0+ reduced testcase. With the patch in
> > > > comment #13 applied we can still see a difference in the push (one register
> > > > pushed Vs 0).
> > >
> > > I can't reproduce zero pushes here I get three with/without
> > > -fno-code-hoisting. code hoisting hoists the two loads inside
> > > the switch before it so we have
> >
> > Ooops my apologize, it needs more flags indeed. -O2 -funroll-all-loops shows
> > 2 registers pushed Vs 1 when -fno-code-hoisting is added.
>
> Still can't reproduce. I've configured with
>
> /space/rguenther/src/svn/gcc-7-branch/configure
> --target=arm-suse-linux-gnueabi --disable-libstdcxx-pch
> --enable-languages=c,c++
>
> and am using
>
> ./cc1 -quiet cortex-m0plus_reproducer.c -O2 -mcpu=cortex-m0plus -mthumb -I
> include -fdump-tree-pre-details -fdump-tree-crited -fdump-tree-all
> -funroll-all-loops -fno-code-hoisting
Oh my bad, I was still not clear enough. I meant using the Cortex-M0+ testcase
but build it for Cortex-M7. Hopefully with -mcpu=cortex-m7 you should see a
difference between with and without code hoisting.
>From gcc-bugs-return-559248-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 13:41:04 2017
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Subject: [Bug debug/80234] [7 Regression] ICE in splice_child_die at dwarfout.c:5265
Date: Tue, 28 Mar 2017 13:41:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
Date: Tue, 28 Mar 2017 13:54:00 -0000
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--- Comment #20 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Thomas Preud'homme from comment #19)
> (In reply to Richard Biener from comment #18)
> > (In reply to Thomas Preud'homme from comment #17)
> > > (In reply to rguenther@suse.de from comment #16)
> > > > On Thu, 23 Mar 2017, thopre01 at gcc dot gnu.org wrote:
> > > > >
> > > > > Funnily this led back to the Cortex-M0+ reduced testcase. With the patch in
> > > > > comment #13 applied we can still see a difference in the push (one register
> > > > > pushed Vs 0).
> > > >
> > > > I can't reproduce zero pushes here I get three with/without
> > > > -fno-code-hoisting. code hoisting hoists the two loads inside
> > > > the switch before it so we have
> > >
> > > Ooops my apologize, it needs more flags indeed. -O2 -funroll-all-loops shows
> > > 2 registers pushed Vs 1 when -fno-code-hoisting is added.
> >
> > Still can't reproduce. I've configured with
> >
> > /space/rguenther/src/svn/gcc-7-branch/configure
> > --target=arm-suse-linux-gnueabi --disable-libstdcxx-pch
> > --enable-languages=c,c++
> >
> > and am using
> >
> > ./cc1 -quiet cortex-m0plus_reproducer.c -O2 -mcpu=cortex-m0plus -mthumb -I
> > include -fdump-tree-pre-details -fdump-tree-crited -fdump-tree-all
> > -funroll-all-loops -fno-code-hoisting
>
> Oh my bad, I was still not clear enough. I meant using the Cortex-M0+
> testcase but build it for Cortex-M7. Hopefully with -mcpu=cortex-m7 you
> should see a difference between with and without code hoisting.
I do. Two pushes with code hoisting and three without. Changed -mcpu above
to -mcpu=cortex-m7.
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Subject: [Bug ipa/78644] [7 Regression] ICE: SIGSEGV in is_gimple_reg_type with -Og -fipa-cp
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Mar 28 13:57:43 2017
New Revision: 246534
URL: https://gcc.gnu.org/viewcvs?rev=246534&root=gcc&view=rev
Log:
2017-03-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/78644
* tree-ssa-ccp.c (evaluate_stmt): When we may not use the value
of a simplification result we may not use it at all.
* gcc.dg/pr78644-1.c: New testcase.
* gcc.dg/pr78644-2.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/pr78644-1.c
trunk/gcc/testsuite/gcc.dg/pr78644-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-ccp.c
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Subject: [Bug tree-optimization/78542] [6 Regression] wrong code at -Og results in endless loop
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Bug 78542 depends on bug 78644, which changed state.
Bug 78644 Summary: [7 Regression] ICE: SIGSEGV in is_gimple_reg_type with -Og -fipa-cp
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78644
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----------------------------------------------------------------------------
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Subject: [Bug ipa/78644] [7 Regression] ICE: SIGSEGV in is_gimple_reg_type with -Og -fipa-cp
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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 ada/80117] Standard'Word_Size is wrong for aarch64 ILP32
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--- Comment #17 from Andreas Schwab <schwab at gcc dot gnu.org> ---
Author: schwab
Date: Tue Mar 28 14:22:29 2017
New Revision: 246536
URL: https://gcc.gnu.org/viewcvs?rev=246536&root=gcc&view=rev
Log:
Backport "Support for Ada on aarch64 with -mabi=ilp32" from trunk
PR ada/80117
* system-linux-aarch64-ilp32.ads: New file.
* gcc-interface/Makefile.in (LIBGNAT_TARGET_PAIRS_COMMON): Rename
from LIBGNAT_TARGET_PAIRS.
(LIBGNAT_TARGET_PAIRS_32, LIBGNAT_TARGET_PAIRS_64): Define.
(LIBGNAT_TARGET_PAIRS): Use LIBGNAT_TARGET_PAIRS_COMMON, and
LIBGNAT_TARGET_PAIRS_64 or LIBGNAT_TARGET_PAIRS_32 for -mabi=lp64
or -mabi=ilp32, resp.
Added:
branches/gcc-6-branch/gcc/ada/system-linux-aarch64-ilp32.ads
Modified:
branches/gcc-6-branch/gcc/ada/ChangeLog
branches/gcc-6-branch/gcc/ada/gcc-interface/Makefile.in
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Subject: [Bug target/80225] ICE when using =@cc output operand incorrectly
Date: Tue, 28 Mar 2017 14:28:00 -0000
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jwjagersma at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|x86_64-w64-mingw32 |x86_64-w64-mingw32,
| |i686-w64-mingw32,
| |i586-pc-msdosdjgpp
--- Comment #1 from jwjagersma at gmail dot com ---
I should mention I also reproduced this issue on i686-w64-mingw32 and
i586-pc-msdosdjgpp (where I first encountered it).
Since the error occurs in a function called "print_reg", I imagine this would
be reproducible on any x86/amd64 target, as the flags register doesn't have a
printable name.
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Subject: [Bug c++/80236] ARM NEON: Crash in std::map
Date: Tue, 28 Mar 2017 14:49:00 -0000
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--- Comment #4 from Dominik Schmidt <dev@dominik-schmidt.de> ---
AddressSanitizer output:
=================================================================
==597==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7e842bd0 at
pc 0x00013d20 bp 0x7e8428dc sp 0x7e8428d4
READ of size 16 at 0x7e842bd0 thread T0
#0 0x13d1f in void
__gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<int const, double> >
>::construct<std::pair<int const, double>, std::pair<int const, double>
const&>(std::pair<int const, double>*, std::pair<int const, double> const&)
(/tmp/crashTest+0x13d1f)
#1 0x13b0f in void
std::allocator_traits<std::allocator<std::_Rb_tree_node<std::pair<int const,
double> > > >::construct<std::pair<int const, double>, std::pair<int const,
double> const&>(std::allocator<std::_Rb_tree_node<std::pair<int const, double>
> >&, std::pair<int const, double>*, std::pair<int const, double> const&)
(/tmp/crashTest+0x13b0f)
#2 0x13a27 in void std::_Rb_tree<int, std::pair<int const, double>,
std::_Select1st<std::pair<int const, double> >, std::less<int>,
std::allocator<std::pair<int const, double> >
>::_M_construct_node<std::pair<int const, double>
const&>(std::_Rb_tree_node<std::pair<int const, double> >*, std::pair<int
const, double> const&) (/tmp/crashTest+0x13a27)
#3 0x1381b in std::_Rb_tree_node<std::pair<int const, double> >*
std::_Rb_tree<int, std::pair<int const, double>, std::_Select1st<std::pair<int
const, double> >, std::less<int>, std::allocator<std::pair<int const, double> >
>::_M_create_node<std::pair<int const, double> const&>(std::pair<int const,
double> const&) (/tmp/crashTest+0x1381b)
#4 0x1352f in std::_Rb_tree_node<std::pair<int const, double> >*
std::_Rb_tree<int, std::pair<int const, double>, std::_Select1st<std::pair<int
const, double> >, std::less<int>, std::allocator<std::pair<int const, double> >
>::_Alloc_node::operator()<std::pair<int const, double> const&>(std::pair<int
const, double> const&) const (/tmp/crashTest+0x1352f)
#5 0x12b23 in std::_Rb_tree_iterator<std::pair<int const, double> >
std::_Rb_tree<int, std::pair<int const, double>, std::_Select1st<std::pair<int
const, double> >, std::less<int>, std::allocator<std::pair<int const, double> >
>::_M_insert_<std::pair<int const, double> const&, std::_Rb_tree<int,
std::pair<int const, double>, std::_Select1st<std::pair<int const, double> >,
std::less<int>, std::allocator<std::pair<int const, double> >
>::_Alloc_node>(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*,
std::pair<int const, double> const&, std::_Rb_tree<int, std::pair<int const,
double>, std::_Select1st<std::pair<int const, double> >, std::less<int>,
std::allocator<std::pair<int const, double> > >::_Alloc_node&)
(/tmp/crashTest+0x12b23)
#6 0x11953 in std::_Rb_tree_iterator<std::pair<int const, double> >
std::_Rb_tree<int, std::pair<int const, double>, std::_Select1st<std::pair<int
const, double> >, std::less<int>, std::allocator<std::pair<int const, double> >
>::_M_insert_unique_<std::pair<int const, double> const&, std::_Rb_tree<int,
std::pair<int const, double>, std::_Select1st<std::pair<int const, double> >,
std::less<int>, std::allocator<std::pair<int const, double> >
>::_Alloc_node>(std::_Rb_tree_const_iterator<std::pair<int const, double> >,
std::pair<int const, double> const&, std::_Rb_tree<int, std::pair<int const,
double>, std::_Select1st<std::pair<int const, double> >, std::less<int>,
std::allocator<std::pair<int const, double> > >::_Alloc_node&)
(/tmp/crashTest+0x11953)
#7 0x11337 in void std::_Rb_tree<int, std::pair<int const, double>,
std::_Select1st<std::pair<int const, double> >, std::less<int>,
std::allocator<std::pair<int const, double> > >::_M_insert_unique<std::pair<int
const, double> const*>(std::pair<int const, double> const*, std::pair<int
const, double> const*) (/tmp/crashTest+0x11337)
#8 0x110a7 in std::map<int, double, std::less<int>,
std::allocator<std::pair<int const, double> >
>::map(std::initializer_list<std::pair<int const, double> >, std::less<int>
const&, std::allocator<std::pair<int const, double> > const&)
(/tmp/crashTest+0x110a7)
#9 0x13e87 in main (/tmp/crashTest+0x13e87)
#10 0x766cb83f in __libc_start_main
(/test/crosscan-test/lib/libc.so.6+0x1683f)
Address 0x7e842bd0 is located in stack of thread T0 at offset 112 in frame
#0 0x13d8f in main (/tmp/crashTest+0x13d8f)
This frame has 2 object(s):
[32, 56) 'j1'
[96, 120) 'j3' <== Memory access at offset 112 partially overflows this
variable
HINT: this may be a false positive if your program uses some custom stack
unwind mechanism or swapcontext
(longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-overflow (/tmp/crashTest+0x13d1f) in
void __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<int const, double> >
>::construct<std::pair<int const, double>, std::pair<int const, double>
const&>(std::pair<int const, double>*, std::pair<int const, double> const&)
Shadow bytes around the buggy address:
0x2fd08520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x2fd08530: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
0x2fd08540: 00 f4 f4 f4 f3 f3 f3 f3 00 00 00 00 00 00 00 00
0x2fd08550: 00 00 00 00 f1 f1 f1 f1 04 f4 f4 f4 f3 f3 f3 f3
0x2fd08560: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
=>0x2fd08570: 00 00 00 f4 f2 f2 f2 f2 00 00[00]f4 f3 f3 f3 f3
0x2fd08580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x2fd08590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x2fd085a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x2fd085b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x2fd085c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==597==ABORTING
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Subject: [Bug c++/80236] ARM NEON: Crash in std::map
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--- Comment #5 from Dominik Schmidt <dev@dominik-schmidt.de> ---
-fsanitize=undefined does not make any difference.
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Subject: [Bug c++/80236] ARM NEON: Crash in std::map
Date: Tue, 28 Mar 2017 15:04:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Are you using the right libstdc++.so that matches the gcc 6.3.0 compiler?
What does "ldd /tmp/crashTest" show?
>From gcc-bugs-return-559259-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 15:04:59 2017
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Subject: [Bug c++/80236] ARM NEON: Crash in std::map
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Also please build with -g so the backtraces and stack info are more useful.
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Subject: [Bug c++/70387] -fnon-call-exceptions has no effect
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--- Comment #5 from jwjagersma at gmail dot com ---
Bumping this, I hope it will be resolved someday.
I found a reference to the same issue, with another test case using posix
signal handlers:
https://cygwin.com/ml/cygwin/2010-07/msg00195.html
This claims it used to work on 3.3.4, and failed from 4.3.4 on.
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Subject: [Bug testsuite/80221] Contrib script to rewrite testcase from absolute to relative line numbers
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--- Comment #11 from Martin Sebor <msebor at gcc dot gnu.org> ---
That would work too. Yet another possibility is to surround all the dg-message
directives that apply to the same line in a pair of new directives (analogously
to dg-{begin,end}-multiline-output):
foobar;
/* { dg-begin-same-line-output .-1 }
...
{ dg-warning "warning for foobar" }
...
{ dg-message "note for foobar" }
...
{ dg-error "error for foobar" }
...
{ dg-end-same-line-output } */
>From gcc-bugs-return-559261-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 15:16:02 2017
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Subject: [Bug tree-optimization/80218] [6/7 Regression] tree-call-cdce does not update block frequencies
Date: Tue, 28 Mar 2017 15:15:00 -0000
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--- Comment #3 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Tue Mar 28 15:14:36 2017
New Revision: 246538
URL: https://gcc.gnu.org/viewcvs?rev=246538&root=gcc&view=rev
Log:
gcc/
PR tree-optimization/80218
* tree-call-cdce.c (shrink_wrap_one_built_in_call_with_conds):
Update block frequencies and counts.
gcc/testsuite/
PR tree-optimization/80218
* gcc.dg/pr80218.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr80218.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-call-cdce.c
>From gcc-bugs-return-559262-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 15:16:06 2017
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Subject: [Bug target/24012] [5/6/7 regression] #define _POSIX_C_SOURCE breaks #include <iostream>
Date: Tue, 28 Mar 2017 15:16:00 -0000
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--- Comment #22 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #20)
> Also, I assume this is only a problem for -std=c++98 or -std=gnu++98,
> because if the system headers don't declare those functions for C++11 and
> later dialects then that's a bug in those system headers.
That's not true, because we (rather bizarrely) do this:
#if _GLIBCXX_HAVE_WCSTOF
#undef wcstof
#endif
namespace std {
#if _GLIBCXX_HAVE_WCSTOF
using ::wcstof
#endif
}
#if __cplusplus >= 201103L
namespace std {
#if _GLIBCXX_HAVE_WCSTOF
using std::wcstof
#endif
}
#endif
This means we unconditionally try to declare them in namespace std, then for
C++11 redeclare std::wcstof as std:wcstof (???).
>From gcc-bugs-return-559263-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 15:19:09 2017
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Subject: [Bug target/24012] [5/6/7 regression] #define _POSIX_C_SOURCE breaks #include <iostream>
Date: Tue, 28 Mar 2017 15:19:00 -0000
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--- Comment #23 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 41068
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41068&action=edit
Use dynamic checks for C99 <wchar.h> functions
This fixes it and passes the testsuite on GNU/Linux and FreeBSD 11.0-RELEASE.
Even though this bug is a regression, this is too late in the gcc-7 process to
make a change like this. I'll commit it early for gcc-8 and backport it if it
doesn't cause any problems.
>From gcc-bugs-return-559264-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 15:25:26 2017
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Subject: [Bug fortran/78881] [F03] reading from string with DTIO procedure does not work properly
Date: Tue, 28 Mar 2017 15:25:00 -0000
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--- Comment #18 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #17)
>
> ro@colima 27 >
> LD_LIBRARY_PATH=../../../sparc-sun-solaris2.12/sparcv9/libgfortran/.libs
> ./dtio_26.exe
>
>
>
> Program aborted. Backtrace:
> Abort
I am sorry, I was not being clear. There are four similar lines that need to
replace abort with the print. We are invoking the Fortran ABORT procedure when
ever a test condition is not met. So I need to see what the condition is saved
in the iomsg variable and which line without aborting.
So something like this in place of the lines starting at line 57:
read(unit=10, fmt='(dt)', iostat=istat, iomsg=imsg) foo
if (imsg.ne."End of record") print *, 57, imsg
rewind(10)
read(unit=10, fmt=*, iostat=istat, iomsg=imsg) foo
if (imsg.ne."End of record") print *, 60, imsg
s = "hello"
read( unit=s, fmt='(dt)', iostat=istat, iomsg=imsg) foo
if (imsg.ne."End of record") print *, 63, imsg
read( unit=s, fmt=*, iostat=istat, iomsg=imsg) foo
if (imsg.ne."End of record") print *, 65
end program p
>From gcc-bugs-return-559265-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 15:26:18 2017
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Subject: [Bug c/80237] New: float to double conversion is not optimized away
Date: Tue, 28 Mar 2017 15:26:00 -0000
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Bug ID: 80237
Summary: float to double conversion is not optimized away
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i get suboptimal code for
__attribute__((noinline))
static float f(float x)
{
return x*x;
}
static double g(float x)
{
return x>0 ? f(x) : x+1.0;
}
float foo(float x)
{
return g(x);
}
i expected a tail call because for float x, (float)(double)x conversion is a
nop, but with -O3 i get
f:
mulss %xmm0, %xmm0
ret
foo:
ucomiss .LC0(%rip), %xmm0
jbe .L8
call f ///////////////// why not tail call?
cvtss2sd %xmm0, %xmm0
cvtsd2ss %xmm0, %xmm0
ret
.L8:
cvtss2sd %xmm0, %xmm0
addsd .LC1(%rip), %xmm0
cvtsd2ss %xmm0, %xmm0
ret
.LC0:
.long 0
.LC1:
.long 0
.long 1072693248
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Subject: [Bug libstdc++/80137] [6/7 Regression] std::generate_canonical calls its generator a non-constant number of times
Date: Tue, 28 Mar 2017 15:32:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Ah, I tried that but not halving the epsilon, and so got a different result
that I wasn't happy with.
I sugested _RealType(0) because if the analysis at
http://stackoverflow.com/a/25669510 is correct then the current code is biased
against 0, so using it when we round up to 1.0 would offset that, to a greater
or lesser extent. I don't know which :-)
I'll go with your suggestion, thanks.
>From gcc-bugs-return-559267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 15:32:36 2017
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Subject: [Bug fortran/78881] [F03] reading from string with DTIO procedure does not work properly
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--- Comment #19 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #18 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
> (In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #17)
>>
>> ro@colima 27 >
>> LD_LIBRARY_PATH=../../../sparc-sun-solaris2.12/sparcv9/libgfortran/.libs
>> ./dtio_26.exe
>>
>>
>>
>> Program aborted. Backtrace:
>> Abort
>
> I am sorry, I was not being clear. There are four similar lines that need to
> replace abort with the print. We are invoking the Fortran ABORT procedure when
> ever a test condition is not met. So I need to see what the condition is saved
> in the iomsg variable and which line without aborting.
Ah, I see.
> So something like this in place of the lines starting at line 57:
[...]
Here's the output I get:
63
65
Rainer
>From gcc-bugs-return-559268-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 15:45:51 2017
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Subject: [Bug target/80211] ICE in curr_insn_transform, at lra-constraints.c:3816
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--- Comment #1 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
I can not reproduce it. With the mentioned options I have
warning: implicit declaration of function '__builtin_dfp_dtstsfi_ov'; did you
mean '__builtin_fpclassify`?
The option set has no sense for me too. -mpower9-dform-vector implements new
load insns for power9 but -mcpu=401 sets up an ancient ppc architecture. They
are exclusive options.
Even if the bug is reproducable, the PR should be marked as P4, IMHO.
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Tue, 28 Mar 2017 15:49:00 -0000
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--- Comment #83 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #81)
> Boost 1.63 has an array of char.
Seems they should change that to unsigned char (or std::byte).
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Subject: [Bug c++/80236] ARM NEON: Crash in std::map
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--- Comment #8 from Dominik Schmidt <dev@dominik-schmidt.de> ---
-fsanitize=address -g:
==539==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7ebcac10 at
pc 0x00013d20 bp 0x7ebca90c sp 0x7ebca904
READ of size 16 at 0x7ebcac10 thread T0
#0 0x13d1f in void
__gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<int const, double> >
>::construct<std::pair<int const, double>, std::pair<int const, double>
const&>(std::pair<int const, double>*, std::pair<int const, double> const&)
/usr/local/oecore-x86_64/sysroots/cortexa7hf-neon-vfpv4-oe-linux-gnueabi/usr/include/c++/6.3.0/ext/new_allocator.h:120
#1 0x13b0f in void
std::allocator_traits<std::allocator<std::_Rb_tree_node<std::pair<int const,
double> > > >::construct<std::pair<int const, double>, std::pair<int const,
double> const&>(std::allocator<std::_Rb_tree_node<std::pair<int const, double>
> >&, std::pair<int const, double>*, std::pair<int const, double> const&)
/usr/local/oecore-x86_64/sysroots/cortexa7hf-neon-vfpv4-oe-linux-gnueabi/usr/include/c++/6.3.0/bits/alloc_traits.h:455
#2 0x13a27 in void std::_Rb_tree<int, std::pair<int const, double>,
std::_Select1st<std::pair<int const, double> >, std::less<int>,
std::allocator<std::pair<int const, double> >
>::_M_construct_node<std::pair<int const, double>
const&>(std::_Rb_tree_node<std::pair<int const, double> >*, std::pair<int
const, double> const&)
/usr/local/oecore-x86_64/sysroots/cortexa7hf-neon-vfpv4-oe-linux-gnueabi/usr/include/c++/6.3.0/bits/stl_tree.h:543
#3 0x1381b in std::_Rb_tree_node<std::pair<int const, double> >*
std::_Rb_tree<int, std::pair<int const, double>, std::_Select1st<std::pair<int
const, double> >, std::less<int>, std::allocator<std::pair<int const, double> >
>::_M_create_node<std::pair<int const, double> const&>(std::pair<int const,
double> const&)
/usr/local/oecore-x86_64/sysroots/cortexa7hf-neon-vfpv4-oe-linux-gnueabi/usr/include/c++/6.3.0/bits/stl_tree.h:560
#4 0x1352f in std::_Rb_tree_node<std::pair<int const, double> >*
std::_Rb_tree<int, std::pair<int const, double>, std::_Select1st<std::pair<int
const, double> >, std::less<int>, std::allocator<std::pair<int const, double> >
>::_Alloc_node::operator()<std::pair<int const, double> const&>(std::pair<int
const, double> const&) const
/usr/local/oecore-x86_64/sysroots/cortexa7hf-neon-vfpv4-oe-linux-gnueabi/usr/include/c++/6.3.0/bits/stl_tree.h:473
#5 0x12b23 in std::_Rb_tree_iterator<std::pair<int const, double> >
std::_Rb_tree<int, std::pair<int const, double>, std::_Select1st<std::pair<int
const, double> >, std::less<int>, std::allocator<std::pair<int const, double> >
>::_M_insert_<std::pair<int const, double> const&, std::_Rb_tree<int,
std::pair<int const, double>, std::_Select1st<std::pair<int const, double> >,
std::less<int>, std::allocator<std::pair<int const, double> >
>::_Alloc_node>(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*,
std::pair<int const, double> const&, std::_Rb_tree<int, std::pair<int const,
double>, std::_Select1st<std::pair<int const, double> >, std::less<int>,
std::allocator<std::pair<int const, double> > >::_Alloc_node&)
/usr/local/oecore-x86_64/sysroots/cortexa7hf-neon-vfpv4-oe-linux-gnueabi/usr/include/c++/6.3.0/bits/stl_tree.h:1535
#6 0x11953 in std::_Rb_tree_iterator<std::pair<int const, double> >
std::_Rb_tree<int, std::pair<int const, double>, std::_Select1st<std::pair<int
const, double> >, std::less<int>, std::allocator<std::pair<int const, double> >
>::_M_insert_unique_<std::pair<int const, double> const&, std::_Rb_tree<int,
std::pair<int const, double>, std::_Select1st<std::pair<int const, double> >,
std::less<int>, std::allocator<std::pair<int const, double> >
>::_Alloc_node>(std::_Rb_tree_const_iterator<std::pair<int const, double> >,
std::pair<int const, double> const&, std::_Rb_tree<int, std::pair<int const,
double>, std::_Select1st<std::pair<int const, double> >, std::less<int>,
std::allocator<std::pair<int const, double> > >::_Alloc_node&)
/usr/local/oecore-x86_64/sysroots/cortexa7hf-neon-vfpv4-oe-linux-gnueabi/usr/include/c++/6.3.0/bits/stl_tree.h:2004
#7 0x11337 in void std::_Rb_tree<int, std::pair<int const, double>,
std::_Select1st<std::pair<int const, double> >, std::less<int>,
std::allocator<std::pair<int const, double> > >::_M_insert_unique<std::pair<int
const, double> const*>(std::pair<int const, double> const*, std::pair<int
const, double> const*)
/usr/local/oecore-x86_64/sysroots/cortexa7hf-neon-vfpv4-oe-linux-gnueabi/usr/include/c++/6.3.0/bits/stl_tree.h:2250
#8 0x110a7 in std::map<int, double, std::less<int>,
std::allocator<std::pair<int const, double> >
>::map(std::initializer_list<std::pair<int const, double> >, std::less<int>
const&, std::allocator<std::pair<int const, double> > const&)
/usr/local/oecore-x86_64/sysroots/cortexa7hf-neon-vfpv4-oe-linux-gnueabi/usr/include/c++/6.3.0/bits/stl_map.h:215
#9 0x13e87 in main ../main.cpp:15
#10 0x7670783f in __libc_start_main (/lib/libc.so.6+0x1683f)
Address 0x7ebcac10 is located in stack of thread T0 at offset 112 in frame
#0 0x13d8f in main ../main.cpp:11
This frame has 2 object(s):
[32, 56) 'j1'
[96, 120) 'j3' <== Memory access at offset 112 partially overflows this
variable
HINT: this may be a false positive if your program uses some custom stack
unwind mechanism or swapcontext
(longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-overflow
/usr/local/oecore-x86_64/sysroots/cortexa7hf-neon-vfpv4-oe-linux-gnueabi/usr/include/c++/6.3.0/ext/new_allocator.h:120
in void __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<int const,
double> > >::construct<std::pair<int const, double>, std::pair<int const,
double> const&>(std::pair<int const, double>*, std::pair<int const, double>
const&)
Shadow bytes around the buggy address:
0x2fd79530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x2fd79540: f1 f1 f1 f1 00 f4 f4 f4 f3 f3 f3 f3 00 00 00 00
0x2fd79550: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 04 f4 f4 f4
0x2fd79560: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
0x2fd79570: 00 00 00 00 f1 f1 f1 f1 00 00 00 f4 f2 f2 f2 f2
=>0x2fd79580: 00 00[00]f4 f3 f3 f3 f3 00 00 00 00 00 00 00 00
0x2fd79590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x2fd795a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x2fd795b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x2fd795c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x2fd795d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==539==ABORTING
Do you still need a regular gdb backtrace without asan? Looks the same to me,
but I can provide it anyway.
`ldd /tmp/crashTest ` prints:
linux-vdso.so.1 (0x7efa3000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x76e10000)
libm.so.6 => /lib/libm.so.6 (0x76d8f000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x76d63000)
libc.so.6 => /lib/libc.so.6 (0x76c27000)
/lib/ld-linux-armhf.so.3 (0x76f51000)
Yes, I'm pretty sure this is the correct libstdc++.
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Subject: [Bug target/80103] ICE in output_1144, at config/rs6000/vsx.md:2298
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kelvin at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from kelvin at gcc dot gnu.org ---
The committed patch resolves the error.
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From: "roman.morokutti at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/80200] decNumber.c : error : #include_next is a GCC extension
Date: Tue, 28 Mar 2017 16:10:00 -0000
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--- Comment #4 from Roman <roman.morokutti at googlemail dot com> ---
Sorry,
here is the output of gcc -v:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/7.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /home/roman/gcc-source/configure
Thread model: posix
gcc version 7.0.1 20170304 (experimental) (GCC)
Best regards,
Roman
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Subject: [Bug libstdc++/80137] [6/7 Regression] std::generate_canonical calls its generator a non-constant number of times
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Mar 28 16:09:49 2017
New Revision: 246542
URL: https://gcc.gnu.org/viewcvs?rev=246542&root=gcc&view=rev
Log:
PR libstdc++/80137 use std::nextafter instead of looping
PR libstdc++/80137
* include/bits/random.tcc (generate_canonical): Use std::nextafter
or numeric_limits::epsilon() to reduce out-of-range values.
* testsuite/26_numerics/random/uniform_real_distribution/operators/
64351.cc: Verify complexity requirement is met.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/random.tcc
trunk/libstdc++-v3/testsuite/26_numerics/random/uniform_real_distribution/operators/64351.cc
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/80137] [6/7 Regression] std::generate_canonical calls its generator a non-constant number of times
Date: Tue, 28 Mar 2017 16:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80137
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |6.3.1
Target Milestone|--- |6.4
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk so far.
>From gcc-bugs-return-559275-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 16:16:46 2017
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From: "programmist.linuks at mail dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80238] New: genmatch.c:(.text.startup+0x66c6): undefined reference to `operator delete(void*, unsigned long)'
Date: Tue, 28 Mar 2017 16:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80238
Bug ID: 80238
Summary: genmatch.c:(.text.startup+0x66c6): undefined reference
to `operator delete(void*, unsigned long)'
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: programmist.linuks at mail dot ru
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Created attachment 41069
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41069&action=edit
log file
I compile gcc version 6.3.0. After an hour of compilation, I had an error, I
attach a detailed log. (I could not translate it, do not pay any attention to
Russian symbols)
>From gcc-bugs-return-559276-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 16:22:45 2017
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From: "jgreenhalgh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/79534] [7 Regression] tree-ifcombine aarch64 performance regression with trunk@245151
Date: Tue, 28 Mar 2017 16:22:00 -0000
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James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jgreenhalgh at gcc dot gnu.org
--- Comment #3 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
I'm unable to reproduce the performance difference on the systems I have access
to, comparing r245150 against r245151.
>From gcc-bugs-return-559277-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 16:29:02 2017
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80178] Class with deleted copy and move constructors uses wrong argument passing ABI
Date: Tue, 28 Mar 2017 16:29:00 -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 #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Hmm, I don't see anything in the ABI about deleted constructors, and a deleted
function isn't non-trivial (nor trivial).
That said, I agree that it makes sense for a class with only deleted copy/move
ctors to be passed by invisible reference in the case of
copy-list-initialization.
>From gcc-bugs-return-559278-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 16:43:15 2017
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From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/80239] New: [7 regression] 9% regression on dhrystone when targetting Cortex-M7
Date: Tue, 28 Mar 2017 16:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80239
Bug ID: 80239
Summary: [7 regression] 9% regression on dhrystone when
targetting Cortex-M7
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: thopre01 at gcc dot gnu.org
Target Milestone: ---
Target: arm-none-eabi
Hi,
Performance for dhrystone has regressed by 9% after commit r235184 when
targeting Cortex-M7 with -O3 -fno-inline. I've tracked this to a couple of
changes likes the following:
- add r0, sp, #24
+ add r5, sp, #16
str r1, [lr, #4] @ unaligned
str r2, [lr, #8] @ unaligned
- mov r5, r0
- str r0, [sp, #4]
Where [sp, #4] appears to never be loaded again. The mov itself is problematic
as well as removing all the extra str still made the code slower.
>From gcc-bugs-return-559279-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 16:45:37 2017
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Subject: [Bug target/80239] [7 regression] 9% regression on dhrystone when targetting Cortex-M7
Date: Tue, 28 Mar 2017 16:45:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ra
Component|rtl-optimization |target
Target Milestone|--- |7.0
>From gcc-bugs-return-559280-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 16:51:39 2017
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From: "uros at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/53383] Allow -mpreferred-stack-boundary=3 on x86-64
Date: Tue, 28 Mar 2017 16:51:00 -0000
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--- Comment #26 from uros at gcc dot gnu.org ---
Author: uros
Date: Tue Mar 28 16:51:00 2017
New Revision: 246543
URL: https://gcc.gnu.org/viewcvs?rev=246543&root=gcc&view=rev
Log:
PR target/53383
* config/i386/i386.c (ix86_option_override_internal): Always
allow -mincoming-stack-boundary=3 for 64-bit targets.
testsuite/ChangeLog:
PR target/53383
* gcc.target/i386/pr53383-1.c (dg-options): Remove -mno-sse.
* gcc.target/i386/pr53383-2.c (dg-options): Ditto.
* gcc.target/i386/pr53383-3.c (dg-options): Ditto.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr53383-1.c
trunk/gcc/testsuite/gcc.target/i386/pr53383-2.c
trunk/gcc/testsuite/gcc.target/i386/pr53383-3.c
>From gcc-bugs-return-559281-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 16:56:37 2017
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From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/80239] [7 regression] 9% regression on dhrystone when targetting Cortex-M7
Date: Tue, 28 Mar 2017 16:56:00 -0000
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Thomas Preud'homme <thopre01 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ra |
Component|target |rtl-optimization
Target Milestone|7.0 |---
--- Comment #1 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Below is my analysis of the issue. I have a patch for that as well but
unfortunately it only works when applied at r235184 and same goes for reverting
r235184.
After changing:
(insn 608 40 41 2 (set (reg/f:SI 223)
(reg/f:SI 419)) dhry_1.c:101 794 {*thumb2_movsi_insn}
(expr_list:REG_EQUAL (plus:SI (reg/f:SI 102 sfp)
(const_int -64 [0xffffffffffffffc0]))
(nil)))
into:
(insn 608 40 41 2 (set (reg/f:SI 223)
(plus:SI (reg/f:SI 102 sfp)
(const_int 16 [0x10]))) dhry_1.c:101 794 {*thumb2_movsi_insn}
(expr_list:REG_EQUAL (plus:SI (reg/f:SI 102 sfp)
(const_int -64 [0xffffffffffffffc0]))
(nil)))
in curr_insn_transform (), process_alt_operands () choose the alternative with
the memory constraint (alternative 5) which leads the second operand to be of
class NO_REGS. It later reloads with:
(insn 638 0 0 (set (reg:SI 431)
(plus:SI (reg/f:SI 102 sfp)
(const_int 16 [0x10]))) 4 {*arm_addsi3}
(nil))
(insn 608 40 41 2 (set (reg/f:SI 223)
(plus:SI (reg/f:SI 102 sfp)
(const_int 16 [0x10]))) dhry_1.c:101 794 {*thumb2_movsi_insn}
(expr_list:REG_EQUAL (plus:SI (reg/f:SI 102 sfp)
(const_int -64 [0xffffffffffffffc0]))
(nil)))
Then when analyzing insn 638, process_alt_operands decides that reg 431 needs
to be reloaded because its class (NO_REGS, inherited from the analysis of insn
638) does not intersect with ALL_REGS according to in_class_p ().
I believe the problem is that the equivalence stays with NO_REGS as register
class instead of being given that of a register (since it's going to be
reloaded into a register). My patch follows that path and as said above works
just after r235184 but the performance remains worse on recent trunk.
When looking at code generated by recent trunk, the issue mentionned in the
original post is not there which suggest that something else is at play.
>From gcc-bugs-return-559282-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 16:57:41 2017
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Subject: [Bug target/80239] [7 regression] 9% regression on dhrystone when targetting Cortex-M7
Date: Tue, 28 Mar 2017 16:57:00 -0000
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Thomas Preud'homme <thopre01 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ra
Component|rtl-optimization |target
Target Milestone|--- |7.0
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Subject: [Bug c++/80178] Class with deleted copy and move constructors uses wrong argument passing ABI
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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CC| |richard-gccbugzilla@metafoo
| |.co.uk
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This example came from a Clang discussion, and they might also be changing how
they handle this. We might want to bring it up on the cxxabi list if there's
any doubt what the right behaviour is.
CCing Richard, as I discussed it with him last week.
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From: "vincenzo.innocente at cern dot ch" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/57796] AVX2 gather vectorization: code bloat and reduction of performance
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--- Comment #9 from vincenzo Innocente <vincenzo.innocente at cern dot ch> ---
Created attachment 41070
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41070&action=edit
self contained benchmark of scimark2 SparseMat must
content is not randomized
param must be modified by hand in the main
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Subject: [Bug fortran/78661] [OOP] Namelist output missing object designator under DTIO
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--- Comment #28 from janus at gcc dot gnu.org ---
Author: janus
Date: Tue Mar 28 17:01:05 2017
New Revision: 246546
URL: https://gcc.gnu.org/viewcvs?rev=246546&root=gcc&view=rev
Log:
2017-03-28 Janus Weil <janus@gcc.gnu.org>
PR fortran/78661
* trans-io.c (transfer_namelist_element): Perform a polymorphic call
to a DTIO procedure if necessary.
2017-03-28 Janus Weil <janus@gcc.gnu.org>
PR fortran/78661
* gfortran.dg/dtio_25.f90: Modified test case.
* gfortran.dg/dtio_27.f90: New test case.
2017-03-28 Janus Weil <janus@gcc.gnu.org>
PR fortran/78661
* io/write.c (nml_write_obj): Build a class container only if
necessary.
Added:
trunk/gcc/testsuite/gfortran.dg/dtio_27.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-io.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/dtio_25.f90
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/write.c
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From: "vincenzo.innocente at cern dot ch" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/57796] AVX2 gather vectorization: code bloat and reduction of performance
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--- Comment #10 from vincenzo Innocente <vincenzo.innocente at cern dot ch> ---
added a self contained "benchmark"
on my machine
[innocent@vinavx3 ctest]$ c++ -Ofast -Wall SparseOnly.c -march=native ; time
./a.out
0.496u 0.000s 0:00.49 100.0% 0+0k 0+0io 0pf+0w
[innocent@vinavx3 ctest]$ c++ -O2 -Wall SparseOnly.c -march=native ; time
./a.out
0.411u 0.000s 0:00.41 100.0% 0+0k 0+0io 0pf+0w
[innocent@vinavx3 ctest]$ c++ -O3 -Wall SparseOnly.c -march=native ; time
./a.out
0.413u 0.000s 0:00.41 100.0% 0+0k 0+0io 0pf+0w
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Subject: [Bug target/80225] ICE when using =@cc output operand incorrectly
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
This is fixed in gcc-7:
pr80225.c: In function ‘int main()’:
pr80225.c:5:61: error: invalid 'asm': invalid use of asm flag output
asm("lar %0, %1;" : "=@ccz"(z), "=r"(ar) : "rm"(0x1234));
As this is ICE-on-invalid bug, there is no plan for a backport.
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Subject: [Bug rtl-optimization/80197] pgo dramatically pessimizes scimark2 MonteCarlo benchmark
Date: Tue, 28 Mar 2017 17:10:00 -0000
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--- Comment #5 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
On trunk, manually fixing up inlining is not enough: trunk additionally needs
-fno-tracer, otherwise crucial if-conversion of 'if (k < 0) k += m1;' is
prevented.
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/78661] [OOP] Namelist output missing object designator under DTIO
Date: Tue, 28 Mar 2017 17:10:00 -0000
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--- Comment #29 from janus at gcc dot gnu.org ---
AFAICS r246546 should fully fix this PR, so I think it can be closed. Do you
agree, Jerry?
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Subject: [Bug c++/80236] ARM NEON: Crash in std::map
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |UNCONFIRMED
Ever confirmed|1 |0
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Dominik Schmidt from comment #8)
> Do you still need a regular gdb backtrace without asan? Looks the same to
> me, but I can provide it anyway.
This is OK.
> `ldd /tmp/crashTest ` prints:
> linux-vdso.so.1 (0x7efa3000)
> libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x76e10000)
> libm.so.6 => /lib/libm.so.6 (0x76d8f000)
> libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x76d63000)
> libc.so.6 => /lib/libc.so.6 (0x76c27000)
> /lib/ld-linux-armhf.so.3 (0x76f51000)
>
> Yes, I'm pretty sure this is the correct libstdc++.
That was confirmed on IRC:
lrwxrwxrwx 1 root root 19 Feb 28 18:29 /usr/lib/libstdc++.so.6
-> libstdc++.so.6.0.22
I don't see anything obviously wrong in the libstdc++ code, and can't reproduce
this on x86_64, so it might be a misoptimization.
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Subject: [Bug c++/80236] ARM NEON: Crash in std::map
Date: Tue, 28 Mar 2017 17:16:00 -0000
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Oh, but it only happens at -O0, so maybe target specific.
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Subject: [Bug libstdc++/62045] [5/6 Regression] __gnu_pbds::priority_queue<int, less<int>, binary_heap_tag> is too slow
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--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Mar 28 17:18:37 2017
New Revision: 246548
URL: https://gcc.gnu.org/viewcvs?rev=246548&root=gcc&view=rev
Log:
PR libstdc++/62045 fix O(N) insertion in pd_ds binary heap
Backport from mainline
2017-03-15  Xi Ruoyao  <ryxi@stu.xidian.edu.cn>
PR libstdc++/62045
* include/ext/pb_ds/qdetail/binary_heap_/binary_heap_.hpp
(is_heap): Remove.
(push_heap): Remove the wrong checking using is_heap.
(make_heap): Remove the assertion using is_heap.
* include/ext/pb_ds/detail/binary_heap_/insert_fn_imps.hpp
(modify): Ditto.
(resize_for_insert_if_needed): Add PB_DS_ASSERT_VALID after
calling make_heap.
Backport from mainline
2017-03-15 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/62045
* testsuite/ext/pb_ds/regression/priority_queue_binary_heap-62045.cc:
New test.
* testsuite/ext/pb_ds/regression/priority_queues.cc: Fix copy&paste
error in comment.
Added:
branches/gcc-6-branch/libstdc++-v3/testsuite/ext/pb_ds/regression/priority_queue_binary_heap-62045.cc
Modified:
branches/gcc-6-branch/libstdc++-v3/ChangeLog
branches/gcc-6-branch/libstdc++-v3/include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp
branches/gcc-6-branch/libstdc++-v3/include/ext/pb_ds/detail/binary_heap_/insert_fn_imps.hpp
branches/gcc-6-branch/libstdc++-v3/testsuite/ext/pb_ds/regression/priority_queues.cc
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Subject: [Bug libstdc++/80137] [6/7 Regression] std::generate_canonical calls its generator a non-constant number of times
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Mar 28 17:18:42 2017
New Revision: 246549
URL: https://gcc.gnu.org/viewcvs?rev=246549&root=gcc&view=rev
Log:
PR libstdc++/80137 use std::nextafter instead of looping
PR libstdc++/80137
* include/bits/random.tcc (generate_canonical): Use std::nextafter
or numeric_limits::epsilon() to reduce out-of-range values.
* testsuite/26_numerics/random/uniform_real_distribution/operators/
64351.cc: Verify complexity requirement is met.
Modified:
branches/gcc-6-branch/libstdc++-v3/ChangeLog
branches/gcc-6-branch/libstdc++-v3/include/bits/random.tcc
branches/gcc-6-branch/libstdc++-v3/testsuite/26_numerics/random/uniform_real_distribution/operators/64351.cc
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Subject: [Bug c++/80238] genmatch.c:(.text.startup+0x66c6): undefined reference to `operator delete(void*, unsigned long)'
Date: Tue, 28 Mar 2017 17:22:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That's the sized-deallocation function which was new in GCC 5.
How did you configure gcc?
What is your existing compiler that you're using to build it?
>From gcc-bugs-return-559296-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 17:26:28 2017
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Subject: [Bug libstdc++/62045] [5 Regression] __gnu_pbds::priority_queue<int, less<int>, binary_heap_tag> is too slow
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[5/6 Regression] |[5 Regression]
|__gnu_pbds::priority_queue< |__gnu_pbds::priority_queue<
|int, less<int>, |int, less<int>,
|binary_heap_tag> is too |binary_heap_tag> is too
|slow |slow
--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Also fixed for 6.4 now.
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Subject: [Bug libstdc++/80137] [6/7 Regression] std::generate_canonical calls its generator a non-constant number of times
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And also for 6.4
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Subject: [Bug fortran/80046] [5/6/7 Regression] Explicit interface required for at (1): pointer argument
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #2 from janus at gcc dot gnu.org ---
(In reply to Joachim Herb from comment #0)
> Is this an intended behavior?
Well, at least the error on the second procptr assignment is intended behavior.
See PR 56261 for discussion.
The only 'bug' is that gfortran does not reject the first one as well.
> If so, what would be the correct way to handle such pointers?
The correct way would be the one pointed out by Dominique in comment #1, namely
giving 'cloneProc' an explicit interface.
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Subject: [Bug fortran/80046] Explicit interface required: pointer argument
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
Known to work|4.8.5 |
Summary|[5/6/7 Regression] Explicit |Explicit interface
|interface required for at |required: pointer argument
|(1): pointer argument |
--- Comment #3 from janus at gcc dot gnu.org ---
(In reply to janus from comment #2)
> The only 'bug' is that gfortran does not reject the first one as well.
( ... therefore it's not a regression.)
Here is a slightly reduced test for that case, based on the original example:
program p
implicit none
type :: Node_t
procedure(), nopass, pointer :: cloneProc
end type
interface
subroutine NodeCloner( tgt, src )
import Node_t
type(Node_t), pointer, intent(out) :: tgt
type(Node_t), intent(in) :: src
end subroutine
end interface
type(Node_t) :: node
procedure(NodeCloner), pointer :: cloneNode
cloneNode => node%cloneProc
end
>From gcc-bugs-return-559299-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 17:53:15 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/24012] [5/6/7 regression] #define _POSIX_C_SOURCE breaks #include <iostream>
Date: Tue, 28 Mar 2017 17:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=24012
--- Comment #24 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The new tests fail on AIX 7.2:
FAIL: 21_strings/headers/cwchar/24012.cc (test for excess errors)
Excess errors:
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:224:
error: '::wcstold' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:233:
error: '::wcstoll' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:234:
error: '::wcstoull' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:242:
error: '__gnu_cxx::wcstold' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:243:
error: '__gnu_cxx::wcstoll' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:244:
error: '__gnu_cxx::wcstoull' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:268:
error: '::wcstof' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:279:
error: '::vfwscanf' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:290:
error: '::vswscanf' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:300:
error: '::vwscanf' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:310:
error: '__gnu_cxx::wcstof' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:313:
error: '__gnu_cxx::vfwscanf' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:316:
error: '__gnu_cxx::vswscanf' has not been declared
/home/jwakely/build/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/cwchar:319:
error: '__gnu_cxx::vwscanf' has not been declared
This isn't caused by the patch though, it always failed, for the same reason as
FreeBSD. It doesn't pass with the patch because (unlike the BSDs) there's no
dynamic check in config/os/aix/os_defines.h
It looks like _ISOC99_SOURCE is the relevant macro for AIX. If that's not
defined we don't get the C99 functions from <wchar.h>
>From gcc-bugs-return-559300-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 17:54:32 2017
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Subject: [Bug rtl-optimization/80193] [7 Regression] ICE on valid (but hairy) C code at -O3 on x86_64-linux-gnu: in check_allocation, at ira.c:2563
Date: Tue, 28 Mar 2017 17:54:00 -0000
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--- Comment #4 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
I've reproduced it and started to investigate. It is a very complicated
example. I can not even say right now what is wrong, the check or the
allocation result. I guess it will take some time only to investigate it. In
the best scenario, it will be fixed on this week.
>From gcc-bugs-return-559301-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 17:54:37 2017
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Subject: [Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622
Date: Tue, 28 Mar 2017 17:54:00 -0000
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--- Comment #84 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
I think the patch should also handle
arrays of unions like:
union BB {
unsigned char x[10];
};
struct B {
BB x[16];
};
struct A {
B b;
};
A a1, a2;
void test()
{
a1.b = a2.b;
}
compiles to:
; Function void test() (_Z4testv, funcdef_no=0, decl_uid=2384, cgraph_uid=0,
symbol_order=2)
void test() ()
{
<bb 2> [0.00%]:
a1.b = a2.b;
return;
}
while in this example
struct B {
unsigned char x[16];
};
struct A {
B b;
};
A a1, a2;
void test()
{
a1.b = a2.b;
}
compiles to:
;; Function void test() (_Z4testv, funcdef_no=0, decl_uid=2348, cgraph_uid=0,
symbol_order=2)
void test() ()
{
<bb 2> [0.00%]:
MEM[(void *)&a1] = MEM[(void *)&a2];
return;
}
which is probably unnecessary, because all valid examples
used a union with an array of unsigned char. Right?
>From gcc-bugs-return-559302-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 18:00:56 2017
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Subject: [Bug target/80239] [7 regression] 9% regression on dhrystone when targetting Cortex-M7
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--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
is the diff you show backwards? Otherwise the new code looks distinctly
better.
>From gcc-bugs-return-559303-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 18:04:32 2017
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Subject: [Bug target/80239] [7 regression] 9% regression on dhrystone when targetting Cortex-M7
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--- Comment #3 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Richard Earnshaw from comment #2)
> is the diff you show backwards? Otherwise the new code looks distinctly
> better.
Yes it is, sorry. Diff good bad is:
- add r5, sp, #16
+ add r0, sp, #24
str r1, [lr, #4] @ unaligned
str r2, [lr, #8] @ unaligned
+ mov r5, r0
+ str r0, [sp, #4]
>From gcc-bugs-return-559304-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 19:30:55 2017
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Subject: [Bug fortran/78881] [F03] reading from string with DTIO procedure does not work properly
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--- Comment #20 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #19)
> [...]
>
> Here's the output I get:
>
> 63
>
> 65
>
> Rainer
So its internal units, aka a string. and its not detecting the EOR. I will
have to think on this a bit and get back a little later. If you are OK , I will
go off list with you to spare everyone the back and forth on here.
>From gcc-bugs-return-559305-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 19:32:44 2017
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/78881] [F03] reading from string with DTIO procedure does not work properly
Date: Tue, 28 Mar 2017 19:32:00 -0000
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--- Comment #21 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #20 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
> (In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #19)
>
>> [...]
>>
>> Here's the output I get:
>>
>> 63
>>
>> 65
>>
>> Rainer
>
> So its internal units, aka a string. and its not detecting the EOR. I will
> have to think on this a bit and get back a little later. If you are OK , I will
> go off list with you to spare everyone the back and forth on here.
Sure, fine with me.
Thanks.
Rainer
>From gcc-bugs-return-559306-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 20:05:38 2017
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Subject: [Bug fortran/78661] [OOP] Namelist output missing object designator under DTIO
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78661
Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #30 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Agree, closing. PR78670 will have some followup for READ related issues.
Fixed on trunk.
>From gcc-bugs-return-559307-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 20:05:39 2017
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Subject: [Bug fortran/78670] [F03] Incorrect file position with namelist read under DTIO
Date: Tue, 28 Mar 2017 20:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78670
Bug 78670 depends on bug 78661, which changed state.
Bug 78661 Summary: [OOP] Namelist output missing object designator under DTIO
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78661
What |Removed |Added
----------------------------------------------------------------------------
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>From gcc-bugs-return-559308-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 20:09:09 2017
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From: "ian at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug go/80226] ICE gimple-expr.c:474 on Go function returning multiple empty struct/array values
Date: Tue, 28 Mar 2017 20:09:00 -0000
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--- Comment #2 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Tue Mar 28 20:08:31 2017
New Revision: 246553
URL: https://gcc.gnu.org/viewcvs?rev=246553&root=gcc&view=rev
Log:
PR go/80226
* go-gcc.cc (Gcc_backend::return_statement): Check for
void_type_node when checking result size.
Modified:
trunk/gcc/go/ChangeLog
trunk/gcc/go/go-gcc.cc
>From gcc-bugs-return-559309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 20:21:01 2017
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Subject: [Bug go/80226] ICE gimple-expr.c:474 on Go function returning multiple empty struct/array values
Date: Tue, 28 Mar 2017 20:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80226
Ian Lance Taylor <ian at airs dot com> changed:
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--- Comment #3 from Ian Lance Taylor <ian at airs dot com> ---
Fixed. Thanks.
>From gcc-bugs-return-559310-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 20:32:16 2017
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From: "jmichae3 at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80240] New: cannot dynamic_cast variable to intmax_t from variable of type intmax_t
Date: Tue, 28 Mar 2017 20:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80240
Bug ID: 80240
Summary: cannot dynamic_cast variable to intmax_t from variable
of type intmax_t
Product: gcc
Version: 6.2.0
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error: cannot dynamic_cast 'index' (of type 'intmax_t {aka long long int}') to
type 'intmax_t {aka long long int}' (target is not pointer or reference)
result=multiplier*dynamic_cast<intmax_t>(base)+dynamic_cast<intmax_t>(index);
index is of type intmax_t. I should not be getting this error. to you this
might look stupid, but there's a compiler bug and it needs to be paid attention
to, compiler should not be throwing errors on this line.
>From gcc-bugs-return-559311-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 20:33:50 2017
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From: "reichelt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80241] New: [5/6/7 Regression] Broken error message + ICE with invalid attribute
Date: Tue, 28 Mar 2017 20:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80241
Bug ID: 80241
Summary: [5/6/7 Regression] Broken error message + ICE with
invalid attribute
Product: gcc
Version: 7.0
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Keywords: diagnostic, ice-on-invalid-code
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The following invalid code snippet triggers a broken error message
followed by an ICE since GCC 5.2.0:
=================================================
template <typename... T> struct A
{
[[gnu::aligned (alignof(A))...]] char c;
};
A<int> a;
=================================================
bug.cc:3:30: error: expansion pattern '#'tree_list' not supported by
dump_expr#<expression error>' contains no argument packs
[[gnu::aligned (alignof(A))...]] char c;
^~~
bug.cc:3:41: internal compiler error: tree check: expected tree_list, have
error_mark in is_late_template_attribute, at cp/decl2.c:1119
[[gnu::aligned (alignof(A))...]] char c;
^
0x100872c tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc/gcc/tree.c:9817
0x6e946d tree_check(tree_node*, char const*, int, char const*, tree_code)
../../gcc/gcc/tree.h:3064
0x6e946d is_late_template_attribute
../../gcc/gcc/cp/decl2.c:1119
0x6e946d splice_template_attributes
../../gcc/gcc/cp/decl2.c:1179
0x6e946d save_template_attributes
../../gcc/gcc/cp/decl2.c:1205
0x6e946d cplus_decl_attributes(tree_node**, tree_node*, int)
../../gcc/gcc/cp/decl2.c:1420
0x6f036d grokfield(cp_declarator const*, cp_decl_specifier_seq*, tree_node*,
bool, tree_node*, tree_node*)
../../gcc/gcc/cp/decl2.c:951
0x71da83 cp_parser_member_declaration
../../gcc/gcc/cp/parser.c:23392
0x71e63a cp_parser_member_specification_opt
../../gcc/gcc/cp/parser.c:22941
0x71e63a cp_parser_class_specifier_1
../../gcc/gcc/cp/parser.c:22094
0x720bf1 cp_parser_class_specifier
../../gcc/gcc/cp/parser.c:22346
0x720bf1 cp_parser_type_specifier
../../gcc/gcc/cp/parser.c:16419
0x721ada cp_parser_decl_specifier_seq
../../gcc/gcc/cp/parser.c:13326
0x71d275 cp_parser_single_declaration
../../gcc/gcc/cp/parser.c:26621
0x73f19c cp_parser_template_declaration_after_parameters
../../gcc/gcc/cp/parser.c:26315
0x73ee2c cp_parser_explicit_template_declaration
../../gcc/gcc/cp/parser.c:26550
0x73ee2c cp_parser_template_declaration_after_export
../../gcc/gcc/cp/parser.c:26569
0x746fa9 cp_parser_declaration
../../gcc/gcc/cp/parser.c:12445
0x748abb cp_parser_declaration_seq_opt
../../gcc/gcc/cp/parser.c:12372
0x748d9a cp_parser_translation_unit
../../gcc/gcc/cp/parser.c:4366
Please submit a full bug report, [etc.]
>From gcc-bugs-return-559312-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 20:44:45 2017
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From: "jmichae3 at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80243] New: c++ doesn't allow function to return a struct (or object?) - same thing
Date: Tue, 28 Mar 2017 20:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80243
Bug ID: 80243
Summary: c++ doesn't allow function to return a struct (or
object?) - same thing
Product: gcc
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c++ doesn't allow function to return a struct. and notice a class is a struct
with a constructur function and destructor function but has auto-start.
#include <string>
#include <initializer_list>
typedef struct {std::string s;int i;} Structsb;
Structsb fn(std::string s1, int i1) {
return {s1,i1};
}
I should be able to do this with objects which are instantiations of a class
too.
>From gcc-bugs-return-559313-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 20:53:48 2017
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From: "vmakarov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/80193] [7 Regression] ICE on valid (but hairy) C code at -O3 on x86_64-linux-gnu: in check_allocation, at ira.c:2563
Date: Tue, 28 Mar 2017 20:53:00 -0000
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--- Comment #5 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
The allocation is correct. Simply there is no rebuilding conflicts after
generations moves on region edges (there are a lot of them, about 100) for LRA
as LRA does not need the conflict info from IRA.
The patch will be committed soon.
>From gcc-bugs-return-559314-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 20:56:16 2017
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Subject: [Bug rtl-optimization/80193] [7 Regression] ICE on valid (but hairy) C code at -O3 on x86_64-linux-gnu: in check_allocation, at ira.c:2563
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80193
--- Comment #6 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Tue Mar 28 20:55:38 2017
New Revision: 246554
URL: https://gcc.gnu.org/viewcvs?rev=246554&root=gcc&view=rev
Log:
2017-03-28 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/80193
* ira.c (ira): Do not check allocation for LRA.
2017-03-28 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/80193
* gcc.target/i386/pr80193.c: New.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr80193.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ira.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-559315-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 21:06:22 2017
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Subject: [Bug c++/80243] c++ doesn't allow function to return a struct (or object?) - same thing
Date: Tue, 28 Mar 2017 21:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80243
--- Comment #1 from Jim Michaels <jmichae3 at yahoo dot com> ---
#include <string>
#include <initializer_list>
typedef struct {std::string s;int i;} Structsb;
Structsb fn(std::string s1, int i1) {
return {s1,i1};
}
int main() {}
Structsb structsb=fn("string",1);
return strustsb.i;
}
>From gcc-bugs-return-559316-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 21:12:43 2017
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From: "reichelt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80244] New: [6/7 Regression] ICE with attribute in template alias
Date: Tue, 28 Mar 2017 21:12:00 -0000
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Bug ID: 80244
Summary: [6/7 Regression] ICE with attribute in template alias
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
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The following code snippet triggers an ICE since GCC 6.1.0:
======================================================================
template<typename> struct A {};
template<typename T> using B = A<__underlying_type(T) [[gnu::aligned(4)]]>;
======================================================================
bug.cc:3:67: internal compiler error: in layout_type, at stor-layout.c:2386
template<typename T> using B = A<__underlying_type(T) [[gnu::aligned(4)]]>;
^
0xd5a9bf layout_type(tree_node*)
../../gcc/gcc/stor-layout.c:2386
0x1027845 type_hash_canon(unsigned int, tree_node*)
../../gcc/gcc/tree.c:7131
0x1027d2d build_type_attribute_qual_variant(tree_node*, tree_node*, int)
../../gcc/gcc/tree.c:4875
0x7ce47d cp_build_type_attribute_variant(tree_node*, tree_node*)
../../gcc/gcc/cp/tree.c:4156
0x7dd9f2 strip_typedefs(tree_node*, bool*)
../../gcc/gcc/cp/tree.c:1580
0x6478ac canonicalize_type_argument
../../gcc/gcc/cp/pt.c:7331
0x68db53 coerce_template_parms
../../gcc/gcc/cp/pt.c:8128
0x6947ea lookup_template_class_1
../../gcc/gcc/cp/pt.c:8664
0x6947ea lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
../../gcc/gcc/cp/pt.c:9009
0x7a7a8d finish_template_type(tree_node*, tree_node*, int)
../../gcc/gcc/cp/semantics.c:3151
0x7308f4 cp_parser_template_id
../../gcc/gcc/cp/parser.c:15491
0x730b0f cp_parser_class_name
../../gcc/gcc/cp/parser.c:21949
0x72d572 cp_parser_qualifying_entity
../../gcc/gcc/cp/parser.c:6285
0x72d572 cp_parser_nested_name_specifier_opt
../../gcc/gcc/cp/parser.c:5971
0x732b23 cp_parser_simple_type_specifier
../../gcc/gcc/cp/parser.c:16822
0x7208ad cp_parser_type_specifier
../../gcc/gcc/cp/parser.c:16495
0x72f1e2 cp_parser_type_specifier_seq
../../gcc/gcc/cp/parser.c:20777
0x724e61 cp_parser_type_id_1
../../gcc/gcc/cp/parser.c:20623
0x72c4f0 cp_parser_type_id
../../gcc/gcc/cp/parser.c:20693
0x72c4f0 cp_parser_alias_declaration
../../gcc/gcc/cp/parser.c:18589
Please submit a full bug report, [etc.]
In GCC 5 and before the code was accepted.
>From gcc-bugs-return-559317-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 21:28:30 2017
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Subject: [Bug c++/80240] cannot dynamic_cast variable to intmax_t from variable of type intmax_t
Date: Tue, 28 Mar 2017 21:28:00 -0000
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Volker Reichelt <reichelt at gcc dot gnu.org> changed:
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CC| |reichelt at gcc dot gnu.org
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--- Comment #1 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
The C++ standard says in [expr.dynamic.cast]:
1 The result of the expression dynamic_cast<T>(v) is the result of converting
the expression v to type T. T shall be a pointer or reference to a complete
class type, or "pointer to cv void."
intmax_t is neither a pointer or reference and that's what the error message
says.
The compiler is correct, your code is broken.
>From gcc-bugs-return-559318-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 22:25:54 2017
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Subject: [Bug debug/80234] [7 Regression] ICE in splice_child_die at dwarfout.c:5265
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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> ---
I'll have a look.
>From gcc-bugs-return-559319-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 22:26:55 2017
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Subject: [Bug testsuite/43496] gcc.target/powerpc/gcse-1.c fails on powerpc-unknown-linux-gnu with -fpic/-fPIC
Date: Tue, 28 Mar 2017 22:26:00 -0000
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Tue Mar 28 22:26:17 2017
New Revision: 246555
URL: https://gcc.gnu.org/viewcvs?rev=246555&root=gcc&view=rev
Log:
rs6000: Fix gcc.target/powerpc/gcse-1.c for PIC (PR43496)
With PIC a @ha relocation isn't generated, so skip that test then.
PR testsuite/43496
* gcc.target/powerpc/gcse-1.c: Skip scan-assembler-times "@ha" if
generating PIC code.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/powerpc/gcse-1.c
>From gcc-bugs-return-559320-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 22:52:00 2017
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Subject: [Bug rtl-optimization/80193] [7 Regression] ICE on valid (but hairy) C code at -O3 on x86_64-linux-gnu: in check_allocation, at ira.c:2563
Date: Tue, 28 Mar 2017 22:52:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #7 from Jeffrey A. Law <law at redhat dot com> ---
Fixed by Vlad's patch on the trunk.
>From gcc-bugs-return-559321-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 28 23:13:24 2017
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Subject: [Bug tree-optimization/79534] [7 Regression] tree-ifcombine aarch64 performance regression with trunk@245151
Date: Tue, 28 Mar 2017 23:13:00 -0000
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--- Comment #4 from Brian Rzycki <brzycki at gmail dot com> ---
Hi James, thank you for taking the time to test this. Unfortunately I can't
post the original code because of its license. The problem is with the
weighting changing enough that at least one pair of if conditionals is no
longer converted into a boolean logical if.
If it helps I can talk to Sebastian to see if we have time to refine the
reduced test case. Alternatively I may be able to post the diff of the previous
and current passes on the real code showing the branch no longer selected for
conversion.
>From gcc-bugs-return-559322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 02:07:30 2017
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Subject: [Bug target/80246] New: Builtin's for POWER's dxex[q] and diex[q] use the wrong types
Date: Wed, 29 Mar 2017 02:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80246
Bug ID: 80246
Summary: Builtin's for POWER's dxex[q] and diex[q] use the
wrong types
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: bergner at gcc dot gnu.org
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The DFP builtins for extract exponent (dxex and dxexq) return a decimal float
type when the actual value returned by the hardware instructions is a 64-bit
signed binary integer (albeit in a FP register). The return type of the
builtins should match the type of the value returned and not register type it
is returned in, since moving the return value when it's in a FP variable to an
integer variable produces bad and/or incorrect code.
A similar issue affects the DFP insert exponent builtins (diex, diexq), but
this time it is related to using the wrong type for the input argument that
represents the exponent.
>From gcc-bugs-return-559323-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 02:15:57 2017
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Subject: [Bug target/80246] Builtin's for POWER's dxex[q] and diex[q] use the wrong types
Date: Wed, 29 Mar 2017 02:15:00 -0000
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--- Comment #1 from Peter Bergner <bergner at gcc dot gnu.org> ---
bergner@pike:~/gcc/BUGS/LTC137326$ cat dxex.i
long
dxex (_Decimal64 arg)
{
return __builtin_dxex (arg);
}
bergner@pike:~/gcc/BUGS/LTC137326$ gcc -O2 -mcpu=power8 -S dxex.i
bergner@pike:~/gcc/BUGS/LTC137326$ cat dxex.s
[snip]
dxex:
dxex 1,1
drintn. 0,1,1,1
dctfix 1,1
mfvsrd 3,1
blr
Notice the incorrect FP -> integer cast that destroys the return value.
Expected code is:
dxex:
dxex 0,1
mfvsrd 3,0
blr
>From gcc-bugs-return-559324-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 02:17:24 2017
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Subject: [Bug target/80246] Builtin's for POWER's dxex[q] and diex[q] use the wrong types
Date: Wed, 29 Mar 2017 02:17:00 -0000
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Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2017-3-28
--- Comment #2 from Peter Bergner <bergner at gcc dot gnu.org> ---
I'm testing a patch.
>From gcc-bugs-return-559325-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 02:18:20 2017
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Subject: [Bug target/80246] Builtin's for POWER's dxex[q] and diex[q] use the wrong types
Date: Wed, 29 Mar 2017 02:18:00 -0000
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Peter Bergner <bergner at gcc dot gnu.org> changed:
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>From gcc-bugs-return-559326-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 02:47:42 2017
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Subject: [Bug c++/80243] c++ doesn't allow function to return a struct (or object?) - same thing
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
This report doesn't look valid to me. The snippet from comment #0 compiles
successfully and with no warnings with the top of both the 6 branch and trunk.
If you get an error from GCC, please reopen this report and post the full
compiler output here. (Please review https://gcc.gnu.org/bugs to see what
information we're looking for -- see What we need, especially "the compiler
output (error messages, warnings, etc.)".)
>From gcc-bugs-return-559327-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 05:06:50 2017
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Subject: [Bug c++/80241] [5/6/7 Regression] Broken error message + ICE with invalid attribute
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-29
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Target Milestone|--- |5.5
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r222902 aka PR59012.
Before that we get:
pr80241.C:3:30: error: expected ‘]’ before ‘...’ token
[[gnu::aligned (alignof(A))...]] char c;
^
>From gcc-bugs-return-559328-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 05:46:55 2017
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From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80204] macosx-version-min wrong for macOS Sierra 10.12.3
Date: Wed, 29 Mar 2017 05:46:00 -0000
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--- Comment #1 from simon at pushface dot org ---
macOS 10.12.4 includes kernel version 16.5.0.
The command line tools have been updated: clang cc1 is now version
8.1.0 (clang-802.0.38). It still specifies -macosx_version_min 10.12.0 at
link time.
>From gcc-bugs-return-559329-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 06:01:48 2017
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Subject: [Bug rtl-optimization/80233] [7 Regression] ICE in combine_instructions w/ -O2 (and above)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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| |segher at gcc dot gnu.org
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This fixes it for me:
--- combine.c.jj1 2017-03-21 15:49:11.000000000 +0100
+++ combine.c 2017-03-29 07:59:56.627951253 +0200
@@ -1254,6 +1254,7 @@ combine_instructions (rtx_insn *f, unsig
last_combined_insn = PREV_INSN (last_combined_insn);
if (last_combined_insn == NULL_RTX
|| BARRIER_P (last_combined_insn)
+ || NOTE_P (last_combined_insn)
|| BLOCK_FOR_INSN (last_combined_insn) != this_basic_block
|| DF_INSN_LUID (last_combined_insn) <= DF_INSN_LUID (insn))
last_combined_insn = insn;
but I'll study the combine dumps in more detail.
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--- Comment #3 from Ed Smith-Rowland <3dw4rd at verizon dot net> ---
Well, for whatever reason, TR29124 and C++17 chose the - in front of \nu.
As long as we document and warn I think this isn't a defect.
I'll dig through the docs and get back.
>From gcc-bugs-return-559331-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 06:34:47 2017
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Subject: [Bug c++/80247] New: 'nullptr' was not declared in this scope
Date: Wed, 29 Mar 2017 06:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80247
Bug ID: 80247
Summary: 'nullptr' was not declared in this scope
Product: gcc
Version: 4.8.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: sbansal at ciena dot com
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I am migrating my code from 3.4.5 to 4.8.1 and enabled c++11 using -std=C++11
but I am getting below error :
In file included from
/vobs/optnet_comms/comms_applications/3rdparty/google/grpc-current/include/grpc++/impl/codegen/security/auth_context.h:41:0,
from
/vobs/optnet_comms/comms_applications/3rdparty/google/grpc-current/include/grpc++/impl/codegen/create_auth_context.h:43,
from
/vobs/optnet_comms/comms_applications/3rdparty/google/grpc-current/include/grpc++/impl/codegen/server_context.h:45,
from
/vobs/optnet_comms/comms_applications/3rdparty/google/grpc-current/include/grpc++/server_context.h:37,
from
/vobs/optnet_comms/comms_applications/3rdparty/google/grpc_ciena/server/request_mgr.h:35,
from
/vobs/optnet_comms/comms_applications/3rdparty/google/grpc_ciena/secu_framework/session_mgmt.cc:13:
/vobs/optnet_comms/comms_applications/3rdparty/google/grpc-current/include/grpc++/impl/codegen/string_ref.h:
In constructor 'grpc::string_ref::string_ref()':
/vobs/optnet_comms/comms_applications/3rdparty/google/grpc-current/include/grpc++/impl/codegen/string_ref.h:70:24:
error: 'nullptr' was not declared in this scope
string_ref() : data_(nullptr), length_(0) {}
What Can I do to fix that?
Thanks.
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Subject: [Bug rtl-optimization/80197] pgo dramatically pessimizes scimark2 MonteCarlo benchmark
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80197
--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 28 Mar 2017, amonakov at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80197
>
> --- Comment #5 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
> On trunk, manually fixing up inlining is not enough: trunk additionally needs
> -fno-tracer, otherwise crucial if-conversion of 'if (k < 0) k += m1;' is
> prevented.
That means -ftracer has similar issues as path splitting. -ftracer
simply looks for a path with high probability so supposedly the
distorted profile might be the reason for this?
>From gcc-bugs-return-559333-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 07:26:46 2017
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From: "vincenzo.innocente at cern dot ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80248] New: sparse access to Array of structures does not vectorize
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80248
Bug ID: 80248
Summary: sparse access to Array of structures does not
vectorize
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
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in the following example "aos" does not vectorize while the equivalent aos2
does vectorize using vgatherdps instruction
On a slight different matter:
"soa" vectorizes and produces code that is apparently 20% faster than "aos2":
I may open a different PR with a benchmark attached...
cat simpleGather.cc
struct float3 {
float x;
float y;
float z;
};
#define N 1024
float fx[N], g[N];
float fy[N];
float fz[N];
int k[N];
float3 f3[N];
void
aos (void)
{
int i;
for (i = 0; i < N; i++)
g[i] = f3[k[i]].x+f3[k[i]].y+f3[k[i]].z;
}
// use gather
void
aos2 (void)
{
float * ff = &(f3[0].x);
int i;
for (i = 0; i < N; i++)
g[i] = ff[3*k[i]]+ff[3*k[i]+1]+ff[3*k[i]+2];
}
// use gather
void
soa (void)
{
int i;
for (i = 0; i < N; i++)
g[i] = fx[k[i]]+fy[k[i]]+fz[k[i]];
}
[innocent@vinavx3 vectorize]$ c++ -Ofast -Wall -march=haswell -S
simpleGather.cc -fopt-info-vec
simpleGather.cc:31:17: note: loop vectorized
simpleGather.cc:41:17: note: loop vectorized
[innocent@vinavx3 vectorize]$ c++ -v
Using built-in specs.
COLLECT_GCC=c++
COLLECT_LTO_WRAPPER=/afs/cern.ch/work/i/innocent/public/w5/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk//configure
--prefix=/afs/cern.ch/user/i/innocent/w5 -enable-languages=c,c++,lto,fortran
--enable-lto -enable-libitm -disable-multilib
Thread model: posix
gcc version 7.0.1 20170326 (experimental) [trunk revision 246485] (GCC)
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Subject: [Bug c++/80247] 'nullptr' was not declared in this scope
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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> ---
Provide a testcase. It works for me. Testcase:
void *p = nullptr;
> g++-4.8 t.C -S -std=c++11
Note that GCC 4.8 is no longer maintained, please use at least GCC 5.4.
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Subject: [Bug c++/80244] [6/7 Regression] ICE with attribute in template alias
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Known to work| |5.4.1
Target Milestone|--- |6.4
Known to fail| |6.1.0
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Subject: [Bug c++/80241] [5/6/7 Regression] Broken error message + ICE with invalid attribute
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug target/80239] [7 regression] 9% regression on dhrystone when targetting Cortex-M7
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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CC| |vmakarov at gcc dot gnu.org
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testcase?
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Subject: [Bug c++/80238] genmatch.c:(.text.startup+0x66c6): undefined reference to `operator delete(void*, unsigned long)'
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80238
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Target| |x86_64-linux
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-03-29
Version|unknown |6.3.0
Ever confirmed|0 |1
>From gcc-bugs-return-559339-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 07:45:29 2017
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Subject: [Bug libstdc++/68397] std::tr1::expint fails in __expint_En_cont_frac for some long double arguments due to low __max_iter value
Date: Wed, 29 Mar 2017 07:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68397
--- Comment #1 from Ed Smith-Rowland <3dw4rd at verizon dot net> ---
I concur with this solution.
I can make a patch.
>From gcc-bugs-return-559340-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 07:48:57 2017
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Subject: [Bug c++/80247] 'nullptr' was not declared in this scope
Date: Wed, 29 Mar 2017 07:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80247
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Sumit from comment #0)
> I am migrating my code from 3.4.5 to 4.8.1 and enabled c++11 using
Why would you choose 4.8.1 and not 4.8.5 ? There are lots of bug fixes in later
4.8.x releases, especially if you're trying to use C++11 (which was not fully
supported by GCC 4.8.x and so labelled experimental, and under heavy
development with lots of fixes in later releases).
> -std=C++11
The correct option is -std=c++11 not -std=C++11
>From gcc-bugs-return-559341-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 07:50:24 2017
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Subject: [Bug c++/80240] cannot dynamic_cast variable to intmax_t from variable of type intmax_t
Date: Wed, 29 Mar 2017 07:50:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
http://en.cppreference.com/w/cpp/language/dynamic_cast
Please stop reporting a bug every time your code doesn't compile.
>From gcc-bugs-return-559342-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 07:52:13 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80243] c++ doesn't allow function to return a struct (or object?) - same thing
Date: Wed, 29 Mar 2017 07:52:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jim Michaels from comment #0)
> c++ doesn't allow function to return a struct.
Of course it does.
Please stop reporting a bug every time your code doesn't compile, or you
misunderstand how C++ works.
>From gcc-bugs-return-559343-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 08:04:06 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80237] float to double conversion is not optimized away
Date: Wed, 29 Mar 2017 08:04:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-03-29
Component|c |tree-optimization
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
We have (after inlining g into foo):
foo (float x)
{
float _3;
float _4;
double iftmp.0_5;
double _6;
double iftmp.0_7;
double iftmp.0_8;
<bb 2> [100.00%]:
if (x_2(D) > 0.0)
goto <bb 3>; [60.23%]
else
goto <bb 4>; [39.77%]
<bb 3> [60.23%]:
_3 = f (x_2(D));
iftmp.0_5 = (double) _3;
goto <bb 5>; [100.00%]
<bb 4> [39.77%]:
_6 = (double) x_2(D);
iftmp.0_7 = _6 + 1.0e+0;
<bb 5> [100.00%]:
# iftmp.0_8 = PHI <iftmp.0_5(3), iftmp.0_7(4)>
_4 = (float) iftmp.0_8;
return _4;
thus the tailcall is not exposed at GIMPLE level.
For the above we fail to optimize the partial redundancy of the conversion
in PRE. During phi translation we do see that _4 is equal to _3 on the
3->5 edge but phi translation fails because _3 is not antic-in in bb 5.
Not really relevant, I think the check is somewhat bogus. With that fixed
we do detect the tailcall:
<bb 2> [100.00%]:
if (x_2(D) > 0.0)
goto <bb 3>; [60.23%]
else
goto <bb 4>; [39.77%]
<bb 3> [60.23%]:
_3 = f (x_2(D)); [tail call]
goto <bb 5>; [100.00%]
<bb 4> [39.77%]:
_6 = (double) x_2(D);
iftmp.0_7 = _6 + 1.0e+0;
_9 = (float) iftmp.0_7;
<bb 5> [100.00%]:
# prephitmp_10 = PHI <_3(3), _9(4)>
return prephitmp_10;
foo:
.LFB2:
.cfi_startproc
ucomiss .LC0(%rip), %xmm0
jbe .L7
jmp f
.p2align 4,,10
.p2align 3
.L7:
cvtss2sd %xmm0, %xmm0
addsd .LC1(%rip), %xmm0
cvtsd2ss %xmm0, %xmm0
ret
Mine.
>From gcc-bugs-return-559344-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 08:15:50 2017
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From: "sbansal at ciena dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80247] 'nullptr' was not declared in this scope
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--- Comment #3 from Sumit <sbansal at ciena dot com> ---
(In reply to Richard Biener from comment #1)
> Provide a testcase. It works for me. Testcase:
>
> void *p = nullptr;
>
> > g++-4.8 t.C -S -std=c++11
>
> Note that GCC 4.8 is no longer maintained, please use at least GCC 5.4.
The use case is :
060 class string_ref {
061 public:
062 // types
063 typedef const char* const_iterator;
064 typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
065
066 // constants
067 const static size_t npos;
068
069 // construct/copy.
070 string_ref() : data_(nullptr), length_(0) {}
>From gcc-bugs-return-559345-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 08:17:39 2017
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Subject: [Bug c++/80247] 'nullptr' was not declared in this scope
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--- Comment #4 from Sumit <sbansal at ciena dot com> ---
(In reply to Jonathan Wakely from comment #2)
> (In reply to Sumit from comment #0)
> > I am migrating my code from 3.4.5 to 4.8.1 and enabled c++11 using
>
> Why would you choose 4.8.1 and not 4.8.5 ? There are lots of bug fixes in
> later 4.8.x releases, especially if you're trying to use C++11 (which was
> not fully supported by GCC 4.8.x and so labelled experimental, and under
> heavy development with lots of fixes in later releases).
>
> > -std=C++11
>
> The correct option is -std=c++11 not -std=C++11
Yes, I am using -std=c++11.
Actually, we need to use 4.8.1 specifically. Do we have the list of C++11
patches based upon 4.8.5 which we can apply upon 4.8.1
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Subject: [Bug c++/80247] 'nullptr' was not declared in this scope
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Sumit from comment #4)
> (In reply to Jonathan Wakely from comment #2)
> > (In reply to Sumit from comment #0)
> > > I am migrating my code from 3.4.5 to 4.8.1 and enabled c++11 using
> >
> > Why would you choose 4.8.1 and not 4.8.5 ? There are lots of bug fixes in
> > later 4.8.x releases, especially if you're trying to use C++11 (which was
> > not fully supported by GCC 4.8.x and so labelled experimental, and under
> > heavy development with lots of fixes in later releases).
> >
> > > -std=C++11
> >
> > The correct option is -std=c++11 not -std=C++11
>
> Yes, I am using -std=c++11.
>
> Actually, we need to use 4.8.1 specifically. Do we have the list of C++11
> patches based upon 4.8.5 which we can apply upon 4.8.1
Sorry, but then you are on your own.
>From gcc-bugs-return-559347-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 08:24:42 2017
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Subject: [Bug ada/80117] Standard'Word_Size is wrong for aarch64 ILP32
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|7.0 |6.4
--- Comment #18 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Thanks.
>From gcc-bugs-return-559348-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 08:26:00 2017
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Subject: [Bug target/80239] [7 regression] 9% regression on dhrystone when targetting Cortex-M7
Date: Wed, 29 Mar 2017 08:25:00 -0000
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--- Comment #5 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Thomas Preud'homme from comment #1)
>
> I believe the problem is that the equivalence stays with NO_REGS as register
> class instead of being given that of a register (since it's going to be
> reloaded into a register). My patch follows that path and as said above
> works just after r235184 but the performance remains worse on recent trunk.
>
> When looking at code generated by recent trunk, the issue mentionned in the
> original post is not there which suggest that something else is at play.
I bisect this issue down to r239561 and reverting that commit on top of current
trunk is enough to bring the performance back up. I'll still push the patch I
mentioned above forward but given the circumstances I will wait for GCC 8 stage
1 for doing so.
I'll post a testcase of the issue as soon as I have understood what is the
source of the slowdown with r239561 in current trunk.
>From gcc-bugs-return-559349-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 08:27:27 2017
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Subject: [Bug libstdc++/68397] std::tr1::expint fails in __expint_En_cont_frac for some long double arguments due to low __max_iter value
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-559350-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 08:27:52 2017
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Subject: [Bug libstdc++/68397] std::tr1::expint fails in __expint_En_cont_frac for some long double arguments due to low __max_iter value
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|trivial |normal
>From gcc-bugs-return-559351-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 08:33:29 2017
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Subject: [Bug c++/80243] c++ doesn't allow function to return a struct (or object?) - same thing
Date: Wed, 29 Mar 2017 08:33:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Your second example doesn't compile for a very simple reason:
(In reply to Jim Michaels from comment #1)
> #include <string>
> #include <initializer_list>
> typedef struct {std::string s;int i;} Structsb;
> Structsb fn(std::string s1, int i1) {
> return {s1,i1};
> }
> int main() {}
I'm guessing you didn't mean to put a closing brace here?
> Structsb structsb=fn("string",1);
> return strustsb.i;
> }
Do you see what I mean about reporting bugs every time your code doesn't
compile? This is a simple mistake, not a bug in GCC. Stop assuming everything
is a bug in GCC, which has hundreds of thousands of hours of development and
testing by very talented people who understand C++ very well. If something
trivial like returning a struct didn't work somebody would have noticed before
you did. You're not the only user of GCC.
>From gcc-bugs-return-559353-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 08:55:59 2017
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Subject: [Bug c++/80244] [6/7 Regression] ICE with attribute in template alias
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-29
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |7.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r222530.
>From gcc-bugs-return-559352-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 08:55:41 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/79534] [7 Regression] tree-ifcombine aarch64 performance regression with trunk@245151
Date: Wed, 29 Mar 2017 08:55:00 -0000
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James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
It is always helpful to provide the full command line and configuration used,
along with rough details of the platform you are using.
Compiling with:
gcc -O3 -mcpu=cortex-a57
I can see the performance difference reported here when running on Cortex-A57,
Cortex-A72 and Cortex-A53 based systems, while with:
gcc -O3
(i.e. using the generic tuning structures) I see no meaningful performance
differences across multiple microarchitectures.
So, confirmed. Though this is more likely to be a deficiency in the heuristics
in the back-end ifcvt cost model than a regression directly introduced by
Honza's patch.
>From gcc-bugs-return-559354-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 08:59:18 2017
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Subject: [Bug tree-optimization/80249] New: Failed to build SPEC 2006 483.xalancbmk with -fdump-tree-fre
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Bug ID: 80249
Summary: Failed to build SPEC 2006 483.xalancbmk with
-fdump-tree-fre
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: sudi.das at arm dot com
Target Milestone: ---
Created attachment 41071
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41071&action=edit
Reduced testcase
An ICE occurs while building 483.xalancbmk in SPEC2006 with the flag
-fdump-tree-fre (while compiling TokenFactory.cpp)
The attached test case has been reduced from it. It fails with both x86-64 and
AArch64 with the following command :
g++ -O3 -fdump-tree-fre reduced.cpp
reduced.cpp: In member function 'xercesc_2_5::Token*
xercesc_2_5::TokenFactory::getGraphemePattern()':
reduced.cpp:91:8: internal compiler error: in
dump_possible_polymorphic_call_targets, at ipa-devirt.c:3370
Token* TokenFactory::getGraphemePattern() {
^~~~~~~~~~~~
0xb6eb3e dump_possible_polymorphic_call_targets(_IO_FILE*, tree_node*, long,
ipa_polymorphic_call_context const&)
/src/gcc/gcc/ipa-devirt.c:3370
0xf45739 eliminate_dom_walker::before_dom_children(basic_block_def*)
/src/gcc/gcc/tree-ssa-pre.c:4607
0x138620e dom_walker::walk(basic_block_def*)
/src/gcc/gcc/domwalk.c:265
0xf466f7 eliminate
/src/gcc/gcc/tree-ssa-pre.c:4763
0xf469b3 execute
/src/gcc/gcc/tree-ssa-pre.c:5197
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Subject: [Bug fortran/78881] [F03] reading from string with DTIO procedure does not work properly
Date: Wed, 29 Mar 2017 09:08:00 -0000
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Jiong Wang <jiwang at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jiwang at gcc dot gnu.org
--- Comment #22 from Jiong Wang <jiwang at gcc dot gnu.org> ---
(In reply to Rainer Orth from comment #15)
> The new testcase FAILs on 64-bit Solaris/SPARC:
+ AArch64
>
> +FAIL: gfortran.dg/dtio_26.f03 -O0 execution test
> +FAIL: gfortran.dg/dtio_26.f03 -O1 execution test
> +FAIL: gfortran.dg/dtio_26.f03 -O2 execution test
> +FAIL: gfortran.dg/dtio_26.f03 -O3 -fomit-frame-pointer -funroll-loops
> -fpeel-loops -ftracer -finline-functions execution test
> +FAIL: gfortran.dg/dtio_26.f03 -O3 -g execution test
> +FAIL: gfortran.dg/dtio_26.f03 -Os execution test
>
> Thread 2 received signal SIGABRT, Aborted.
> [Switching to Thread 1 (LWP 1)]
> 0xffffffff7f0e6920 in __lwp_sigqueue () from /lib/64/libc.so.1
> (gdb) where
> #0 0xffffffff7f0e6920 in __lwp_sigqueue () from /lib/64/libc.so.1
> #1 0xffffffff7f02949c in raise () from /lib/64/libc.so.1
> #2 0xffffffff7eff8174 in abort () from /lib/64/libc.so.1
> #3 0xffffffff2d039dc4 in _gfortrani_sys_abort ()
> at /vol/gcc/src/hg/trunk/local/libgfortran/runtime/error.c:180
> #4 0xffffffff2d11840c in _gfortran_abort ()
> at /vol/gcc/src/hg/trunk/local/libgfortran/intrinsics/abort.c:32
> #5 0x000000010000236c in p ()
> at /vol/gcc/src/hg/trunk/local/gcc/testsuite/gfortran.dg/dtio_26.f03:64
> #6 0x00000001000024d8 in main (argc=1, argv=0xffffffff7ffff84c)
> at /vol/gcc/src/hg/trunk/local/gcc/testsuite/gfortran.dg/dtio_26.f03:46
> #7 0x00000001000014ac in _start ()
> Backtrace stopped: previous frame identical to this frame (corrupt stack?)
>
> #5 0x000000010000236c in p ()
> at /vol/gcc/src/hg/trunk/local/gcc/testsuite/gfortran.dg/dtio_26.f03:64
> 64 if (imsg.ne."End of record") call abort
> (gdb) p imsg
> $1 = ' ' <repeats 256 times>
>
> Rainer
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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/80250] New: ICE in in final_scan_insn, at final.c:3025 for __builtin_ia32_vp4dpwssds_mask builtin
Date: Wed, 29 Mar 2017 09:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80250
Bug ID: 80250
Summary: ICE in in final_scan_insn, at final.c:3025 for
__builtin_ia32_vp4dpwssds_mask builtin
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Following test-case ICEs:
$ cat ice.i
typedef int a __attribute__ ((__vector_size__ (64)));
__attribute__ ((__vector_size__ (16 * sizeof (float)))) int b ();
#pragma GCC target "avx5124vnniw"
a
c ()
{
long *d;
a e;
a f;
a g;
a h;
a i;
short j = 0;
return __builtin_ia32_vp4dpwssds_mask (h, g, f, e, i, 0, b (), j);
}
$ gcc -O1 -fno-dce ice.i
ice.i: In function ‘c’:
ice.i:15:1: error: could not split insn
}
^
(insn 28 27 8 2 (set (reg:V64SI 25 xmm4 [orig:94 h ] [94])
(const_vector:V64SI [
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
])) "ice.i":14 4934 {movv64si}
(expr_list:REG_UNUSED (reg:V64SI 25 xmm4 [orig:94 h ] [94])
(nil)))
ice.i:15:1: internal compiler error: in final_scan_insn, at final.c:3025
0xbab5a8 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc/rtl-error.c:108
0x8fac70 final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
../../gcc/final.c:3025
0x8faf62 final(rtx_insn*, _IO_FILE*, int)
../../gcc/final.c:2051
0x8fb719 rest_of_handle_final
../../gcc/final.c:4489
0x8fb719 execute
../../gcc/final.c:4562
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Subject: [Bug target/80250] ICE in in final_scan_insn, at final.c:3025 for __builtin_ia32_vp4dpwssds_mask builtin
Date: Wed, 29 Mar 2017 09:23:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r242569.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80248] sparse access to Array of structures does not vectorize using gathers
Date: Wed, 29 Mar 2017 09:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80248
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-29
CC| |jakub at gcc dot gnu.org
Blocks| |53947
Summary|sparse access to Array of |sparse access to Array of
|structures does not |structures does not
|vectorize |vectorize using gathers
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
t.cc:20:17: note: not vectorized: not suitable for gather load _2 = f3[_1].x;
t.cc:20:17: note: bad data references.
that's because vect_check_gather_scatter computes a scale of 12 which isn't
supported by the HW (index _1, scale 12).
It seems to force a SSA name info->offset (_1) and thus doesn't handle
_1 * 3 to make scale == 4 supported. In aos2 you conveniently expose
that as a SSA name yourself.
Looks like we need to split up scale by eventually emitting a multiplication
of the index vector separately.
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 tree-optimization/80181] [7 Regression] ICE in set_lattice_value, at tree-ssa-ccp.c:505
Date: Wed, 29 Mar 2017 09:29:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Mar 29 09:28:46 2017
New Revision: 246561
URL: https://gcc.gnu.org/viewcvs?rev=246561&root=gcc&view=rev
Log:
2017-03-29 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/78644
* tree-ssa-ccp.c (evaluate_stmt): When we may not use the value
of a simplification result we may not use it at all.
* gcc.dg/pr78644-1.c: New testcase.
* gcc.dg/pr78644-2.c: Likewise.
2017-03-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/80181
* tree-ssa-ccp.c (likely_value): UNDEFINED ^ X is UNDEFINED.
* gcc.dg/torture/pr80181.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr78644-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr78644-2.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80181.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-ccp.c
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Subject: [Bug ipa/78644] [7 Regression] ICE: SIGSEGV in is_gimple_reg_type with -Og -fipa-cp
Date: Wed, 29 Mar 2017 09:29:00 -0000
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Mar 29 09:28:46 2017
New Revision: 246561
URL: https://gcc.gnu.org/viewcvs?rev=246561&root=gcc&view=rev
Log:
2017-03-29 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-03-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/78644
* tree-ssa-ccp.c (evaluate_stmt): When we may not use the value
of a simplification result we may not use it at all.
* gcc.dg/pr78644-1.c: New testcase.
* gcc.dg/pr78644-2.c: Likewise.
2017-03-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/80181
* tree-ssa-ccp.c (likely_value): UNDEFINED ^ X is UNDEFINED.
* gcc.dg/torture/pr80181.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr78644-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr78644-2.c
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr80181.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-ccp.c
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80235] ICE: coarrays, submodule
Date: Wed, 29 Mar 2017 09:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80235
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-29
CC| |pault at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed on 6.3.0 and trunk (7.0.1). If I compile the submodule file with an
instrumented gfortran I get
../../p_work/gcc/fortran/trans-decl.c:4694:14: runtime error: member access
within null pointer of type 'struct module_htab_entry'
ASAN:DEADLYSIGNAL
=================================================================
==98134==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000010 (pc
0x00010050e94e bp 0x7fff5fbfd660 sp 0x7fff5fbfd590 T0)
==98134==The signal is caused by a READ memory access.
==98134==Hint: address points to the zero page.
#0 0x10050e94d in gfc_module_add_decl(module_htab_entry*, tree_node*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x10050e94d)
#1 0x100510fe7 in gfc_build_qualified_array(tree_node*, gfc_symbol*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x100510fe7)
#2 0x100529fe6 in gfc_get_symbol_decl(gfc_symbol*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x100529fe6)
#3 0x1005a5fb8 in gfc_conv_variable(gfc_se*, gfc_expr*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1005a5fb8)
#4 0x100585f84 in gfc_conv_expr(gfc_se*, gfc_expr*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x100585f84)
#5 0x10059e348 in gfc_conv_expr_lhs(gfc_se*, gfc_expr*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x10059e348)
#6 0x100445d15 in gfc_conv_ss_descriptor(stmtblock_t*, gfc_ss*, int)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x100445d15)
#7 0x100491e42 in gfc_conv_expr_descriptor(gfc_se*, gfc_expr*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x100491e42)
#8 0x100616c35 in gfc_conv_intrinsic_size(gfc_se*, gfc_expr*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x100616c35)
#9 0x10069d548 in gfc_conv_intrinsic_function(gfc_se*, gfc_expr*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x10069d548)
#10 0x1005eb934 in gfc_conv_function_expr(gfc_se*, gfc_expr*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1005eb934)
#11 0x100585f6a in gfc_conv_expr(gfc_se*, gfc_expr*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x100585f6a)
#12 0x1005fd683 in gfc_trans_assignment_1(gfc_expr*, gfc_expr*, bool, bool,
bool, bool)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1005fd683)
#13 0x10060010e in gfc_trans_assignment(gfc_expr*, gfc_expr*, bool, bool,
bool, bool)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x10060010e)
#14 0x100600335 in gfc_trans_assign(gfc_code*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x100600335)
#15 0x100412e5f in trans_code(gfc_code*, tree_node*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x100412e5f)
#16 0x100414328 in gfc_trans_code(gfc_code*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x100414328)
#17 0x1005462de in gfc_generate_function_code(gfc_namespace*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1005462de)
#18 0x10042076d in gfc_generate_module_code(gfc_namespace*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x10042076d)
#19 0x100278e07 in translate_all_program_units(gfc_namespace*)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x100278e07)
#20 0x1002933bb in gfc_parse_file()
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1002933bb)
#21 0x1003e803c in gfc_be_parse_file()
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1003e803c)
#22 0x10433ab18 in compile_file()
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x10433ab18)
#23 0x10434360c in do_compile()
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x10434360c)
#24 0x1061e7b34 in toplev::main(int, char**)
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1061e7b34)
#25 0x1061ece11 in main
(/opt/gcc/gcc7gp/libexec/gcc/x86_64-apple-darwin16.4.0/7.0.1/f951+0x1061ece11)
#26 0x7fffb5a49234 in start (/usr/lib/system/libdyld.dylib+0x5234)
>From gcc-bugs-return-559362-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 09:55:16 2017
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Subject: [Bug ipa/79931] ICE in dump_possible_polymorphic_call_targets with -fdump-ipa-all -O2
Date: Wed, 29 Mar 2017 09:55:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sudi.das at arm dot com
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 80249 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-559361-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 09:55:15 2017
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Subject: [Bug tree-optimization/80249] Failed to build SPEC 2006 483.xalancbmk with -fdump-tree-fre
Date: Wed, 29 Mar 2017 09:55:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |marxin at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 79931 ***
>From gcc-bugs-return-559364-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 10:11:04 2017
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Subject: [Bug ada/79441] [7 regression] gnat.dg/pack9.adb fails
Date: Wed, 29 Mar 2017 10:11:00 -0000
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--- Comment #4 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
Any chance of fixing that before gcc7?
>From gcc-bugs-return-559365-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 10:13:09 2017
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Subject: [Bug testsuite/79356] XPASS in attr-alloc_size-11.c
Date: Wed, 29 Mar 2017 10:13:00 -0000
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--- Comment #12 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
Still XPASSes on s390 (but not s390x with -m31 or -m64).
>From gcc-bugs-return-559366-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 10:14:15 2017
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Subject: [Bug ada/79441] [7 regression] gnat.dg/pack9.adb fails
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Any chance of fixing that before gcc7?
Probably not, the underlying issue is in the SRA pass and not a regression.
>From gcc-bugs-return-559367-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 10:31:21 2017
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Subject: [Bug testsuite/79356] XPASS in attr-alloc_size-11.c
Date: Wed, 29 Mar 2017 10:31:00 -0000
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--- Comment #13 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01468.html
>From gcc-bugs-return-559368-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Mar 29 11:32:38 2017
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Subject: Still Looking For the Dream Date?
Date: Wed, 29 Mar 2017 11:32:00 -0000
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[not found] <bug-79126-4@http.gcc.gnu.org/bugzilla/>
2017-03-23 9:44 ` [Bug testsuite/79126] [7 regression] FAIL: gcc.dg/tree-ssa/pr77445-2.c scan-tree-dump thread1 "Jumps threaded: 16" ramana at gcc dot gnu.org
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