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* [Bug middle-end/78809] Inline strcmp with small constant strings
[not found] <bug-78809-4@http.gcc.gnu.org/bugzilla/>
@ 2018-07-23 21:42 ` qing.zhao at oracle dot com
0 siblings, 0 replies; only message in thread
From: qing.zhao at oracle dot com @ 2018-07-23 21:42 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78809
--- Comment #44 from Qing Zhao <qing.zhao at oracle dot com> ---
> (In reply to wilco from comment #43)
will provide a simple patch for this issue.
>From gcc-bugs-return-610739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jul 23 21:42:34 2018
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From: "eracpp at eml dot cc" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/79501] member deduction guide not recognized
Date: Mon, 23 Jul 2018 22:17:00 -0000
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eracpp at eml dot cc changed:
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CC| |eracpp at eml dot cc
--- Comment #1 from eracpp at eml dot cc ---
Still observed on trunk (GCC 9.0.0 20180722):
https://wandbox.org/permlink/vpY98XCvEz2k0IN9
Relevant paragraph from the standard ([temp.deduct.guild]-3):
http://eel.is/c++draft/temp.deduct.guide#3.sentence-4
"A deduction-guide shall be declared in the same scope as the corresponding
class template and, for a member class template, with the same access."
>From gcc-bugs-return-610741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jul 23 23:50:19 2018
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From: "kelvin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86448] GCC 9 compiler generates slower code for spec 2006 milc on a power9 using -mcpu=power9 than using -mcpu=power8
Date: Mon, 23 Jul 2018 23:50:00 -0000
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kelvin at gcc dot gnu.org changed:
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CC| |kelvin at gcc dot gnu.org
--- Comment #1 from kelvin at gcc dot gnu.org ---
Using trunk on a dedicated DD2.2 power9, I get the following performance
comparisons:
-mcpu=power8 -mcpu=power9
28.92 28.97
28.37 28.99
28.13 28.26
29.06 28.12
28.8 28.23
28.9 28.69
28.37 28.48
28.3 28.08
delta Percent
average 28.60625 28.4775 0.12875 0.45%
>From gcc-bugs-return-610740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jul 23 22:17:01 2018
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Subject: [Bug tree-optimization/86650] -Warray-bounds missing inlining context
Date: Mon, 23 Jul 2018 23:50:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Testing a patch.
>From gcc-bugs-return-610742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jul 23 23:50:49 2018
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Subject: [Bug tree-optimization/86650] -Warray-bounds missing inlining context
Date: Tue, 24 Jul 2018 00:53:00 -0000
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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> ---
Patch posted for review:
https://gcc.gnu.org/ml/gcc-patches/2018-07/msg01286.html
>From gcc-bugs-return-610743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 00:53:17 2018
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From: "bugzilla-gcc at thewrittenword dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/86599] Problems building libgfortran from 7.2.0 on HP-UX 11.31/PA
Date: Tue, 24 Jul 2018 01:41:00 -0000
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--- Comment #2 from The Written Word <bugzilla-gcc at thewrittenword dot com> ---
(In reply to The Written Word from comment #1)
> I get a similar error with 8.1.0.
And with 5.5.0.
>From gcc-bugs-return-610744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 01:41:39 2018
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Subject: [Bug libobjc/48626] --enable-objc-gc should be automatic
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
I'll probably keep --enable-objc-gc in my configure flags anyways even if it
becomes automatic, but becoming automatic could help increase test coverage of
it. I guess I'll confirm this.
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Subject: [Bug other/84889] Ideas on revamping how we format diagnostics
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #9 from Eric Gallager <egallager at gcc dot gnu.org> ---
ASSIGNED since there's an assignee
>From gcc-bugs-return-610746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 01:56:20 2018
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Subject: [Bug debug/82738] [meta-bug] issues with the -Og optimization level
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |vries at gcc dot gnu.org
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Tom de Vries seems to have been working on bugs related to this recently.
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Subject: [Bug other/63440] -Og does enable -fmerge-constants too
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=59658
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Note that the various "Enabled at levels ..." were not updated for -Og.
This part is bug 59658.
>From gcc-bugs-return-610748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 02:11:24 2018
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Subject: [Bug debug/68836] GCC can't properly emit debug info for function arguments in a back-trace when using -Og
Date: Tue, 24 Jul 2018 02:56:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Without a (guality?) testcase there's nothing to do here. But quite likely
> the reason is inlining. Alex new work _might_ help here.
Which new work?
>From gcc-bugs-return-610749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 02:56:09 2018
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86652] New: pointer to function type cannot have 'const' qualifier
Date: Tue, 24 Jul 2018 03:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86652
Bug ID: 86652
Summary: pointer to function type cannot have 'const' qualifier
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
Target Milestone: ---
The code is as follow:
class C {
public:
template <typename i>
int (*f())() const;
};
g++ accepts the code, but clang++ rejects it:
code4.cpp:4:7: error: pointer to function type cannot have 'const' qualifier
int (*f())() const;
^
1 error generated.
If it's a pointer to a const function, the line shall be:
int (*f() const)();
If the return type is const (which is of course meaningless), the line shall
be:
const int (*f())();
However, I do not quite understant int (*f())() const;. Maybe it is illegal as
clang++ says?
>From gcc-bugs-return-610750-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 03:03:20 2018
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Subject: [Bug c++/86652] pointer to function type cannot have 'const' qualifier
Date: Tue, 24 Jul 2018 03:57:00 -0000
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--- Comment #1 from zhonghao at pku dot org.cn ---
A related code sample:
class C { public: template<typename i> int (*f())() const; };
int foo(C c) { return (*c.f<int>())(); }
The messages from clang++:
error: pointer to function type cannot have 'const' qualifier
class C { public: template<typename i> int (*f())() const; };
error: no matching member function for call to 'f'
int foo(C c) { return (*c.f<int>())(); }
~~^~~~~~
2 errors generated.
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Subject: [Bug c++/86652] pointer to function type cannot have 'const' qualifier
Date: Tue, 24 Jul 2018 07:01:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This seems like the const is applying to the function (not the function type
that it is returning).
>From gcc-bugs-return-610752-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 07:01:48 2018
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Subject: [Bug tree-optimization/69224] [6/7 Regression] -Warray-bounds false positive with -O3 and struct pointer parameter
Date: Tue, 24 Jul 2018 07:02:00 -0000
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--- Comment #14 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 23 Jul 2018, law at redhat dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69224
>
> --- Comment #13 from Jeffrey A. Law <law at redhat dot com> ---
> Agreed. I don't see a lot of value in backporting this fix to the release
> branches. One could argue that decision means this should move to CLOSED as
> it's been fixed for gcc-8 and the trunk.
We're keeping regression bugs open until branch close for tracking
purposes and also to easily find dups w/o searching closed bugs.
>From gcc-bugs-return-610753-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 07:02:59 2018
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Subject: [Bug debug/68836] GCC can't properly emit debug info for function arguments in a back-trace when using -Og
Date: Tue, 24 Jul 2018 07:47:00 -0000
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--- Comment #3 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 24 Jul 2018, egallager at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68836
>
> Eric Gallager <egallager at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |egallager at gcc dot gnu.org
>
> --- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #1)
> > Without a (guality?) testcase there's nothing to do here. But quite likely
> > the reason is inlining. Alex new work _might_ help here.
>
> Which new work?
stmt frontiers and location views
>From gcc-bugs-return-610754-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 07:47:36 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86653] New: UBSAN error: cp/parser.c:11760:19: runtime error: load of value 10, which is not a valid value for type 'bool'
Date: Tue, 24 Jul 2018 07:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86653
Bug ID: 86653
Summary: UBSAN error: cp/parser.c:11760:19: runtime error: load
of value 10, which is not a valid value for type
'bool'
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: jason at gcc dot gnu.org, nathan at gcc dot gnu.org
Blocks: 63426
Target Milestone: ---
Following causes UBSAN:
dev/shm/mliska/objdir/gcc/testsuite/g++2/../../xg++
-B/dev/shm/mliska/objdir/gcc/testsuite/g++2/../../
/home/mliska/Programming/gcc/gcc/testsuite/g++.dg/parse/cond8.C
-fno-diagnostics-show-caret -fdiagnostics-color=never -nostdinc++
-I/dev/shm/mliska/objdir/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/dev/shm/mliska/objdir/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/home/mliska/Programming/gcc/libstdc++-v3/libsupc++
-I/home/mliska/Programming/gcc/libstdc++-v3/include/backward
-I/home/mliska/Programming/gcc/libstdc++-v3/testsuite/util -fmessage-length=0
-std=c++11 -pedantic-errors -Wno-long-long -S -o cond8.s
/home/mliska/Programming/gcc/gcc/testsuite/g++.dg/parse/cond8.C: In function
‘void foo()’:
/home/mliska/Programming/gcc/gcc/testsuite/g++.dg/parse/cond8.C:5:12: error:
expected initializer before ‘)’ token
/home/mliska/Programming/gcc/gcc/cp/parser.c:11760:19: runtime error: load of
value 10, which is not a valid value for type 'bool'
/home/mliska/Programming/gcc/gcc/testsuite/g++.dg/parse/cond8.C:7:14: error:
expected initializer before ‘;’ token
/home/mliska/Programming/gcc/gcc/testsuite/g++.dg/parse/cond8.C:9:15: error:
expected initializer before ‘)’ token
Proper fix is to initialiaze
bool non_constant_p;
Will be setting that to false OK?
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
[Bug 63426] [meta-bug] Issues found with -fsanitize=undefined
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Subject: [Bug c++/86653] UBSAN error: cp/parser.c:11760:19: runtime error: load of value 10, which is not a valid value for type 'bool'
Date: Tue, 24 Jul 2018 07:49:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-07-24
Target Milestone|--- |9.0
Ever confirmed|0 |1
>From gcc-bugs-return-610756-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 07:49:21 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/84640] gcc/fortran/simplify.c:2587:9: runtime error: pointer index expression with base 0x0000090de160 overflowed to 0xffffffffc0632960
Date: Tue, 24 Jul 2018 08:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84640
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Any progress about this?
>From gcc-bugs-return-610757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 08:13:40 2018
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From: "gjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/85969] avr/gen-avr-mmcu-specs.c:56: unused function ?
Date: Tue, 24 Jul 2018 08:18:00 -0000
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Georg-Johann Lay <gjl at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P5
Status|WAITING |NEW
--- Comment #3 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
oops, my bad. I stared at the wrong file. The usage of str_prefix_p was removed
in r243033:
http://gcc.gnu.org/viewcvs/gcc/trunk/gcc/config/avr/gen-avr-mmcu-specs.c?r1=243033&r2=243032&pathrev=243033
>From gcc-bugs-return-610758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 08:18:55 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/86654] New: [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Tue, 24 Jul 2018 08:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86654
Bug ID: 86654
Summary: [9 Regression] ICE in gen_member_die, at
dwarf2out.c:24933
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: marxin at gcc dot gnu.org, rguenth at gcc dot gnu.org
Target Milestone: ---
I have slightly reduced test-case from Firefox:
$ g++ -flto=8 -shared -O2 [1234].ii -fPIC -g
...
lto1: internal compiler error: in gen_member_die, at dwarf2out.c:24933
0x5c8117 gen_member_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:24933
0x5c8117 gen_struct_or_union_type_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25128
0x871ebf gen_tagged_type_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25329
0x88bc0f gen_typedef_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25243
0x86fc0a gen_decl_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:26229
0x8727bc gen_type_die_with_usage
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25394
0x873416 gen_type_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25578
0x86fef2 gen_decl_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:26297
0x8719e2 gen_member_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25032
0x8719e2 gen_struct_or_union_type_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25128
0x871ebf gen_tagged_type_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25329
0x872d37 gen_type_die_with_usage
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25524
0x871f49 gen_tagged_type_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25298
0x872d37 gen_type_die_with_usage
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25524
0x872d63 gen_type_die_with_usage
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25482
0x873416 gen_type_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25578
0x86fef2 gen_decl_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:26297
0x8719e2 gen_member_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25032
0x8719e2 gen_struct_or_union_type_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25128
0x871ebf gen_tagged_type_die
/home/marxin/Programming/gcc/gcc/dwarf2out.c:25329
>From gcc-bugs-return-610759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 08:20:27 2018
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Tue, 24 Jul 2018 08:22:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 44426
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44426&action=edit
test-case 1/4
>From gcc-bugs-return-610761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 08:23:36 2018
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Tue, 24 Jul 2018 08:23:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 44428
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44428&action=edit
test-case 3/4
>From gcc-bugs-return-610760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 08:22:32 2018
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Tue, 24 Jul 2018 08:23:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 44427
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44427&action=edit
test-case 2/4
>From gcc-bugs-return-610762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 08:23:51 2018
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Tue, 24 Jul 2018 08:28:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 44429
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test-case 4/4
>From gcc-bugs-return-610763-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 08:28:12 2018
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Tue, 24 Jul 2018 09:03:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-07-24
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'll try to investigate.
>From gcc-bugs-return-610764-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 09:03:35 2018
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Subject: [Bug lto/86651] lto-wrapper.exe: fatal error: simple_object_copy_lto_debug_sections not implemented: Invalid argument
Date: Tue, 24 Jul 2018 09:14:00 -0000
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U.Mutlu <um at mutluit dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from U.Mutlu <um at mutluit dot com> ---
Do you get the same error if you leave out the --disable-plugin ?
>From gcc-bugs-return-610765-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 09:14:48 2018
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Subject: [Bug target/86267] detect conversions between bitmasks and vector masks
Date: Tue, 24 Jul 2018 09:37:00 -0000
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--- Comment #2 from Matthias Kretz <kretz at kde dot org> ---
Sorry for the delay. Vacation...
This pattern appears in many variations in the implementation of
wg21.link/p0214r9. The fixed_size<N> ABI tag used with a simd_mask type
requires a decision from the implementer, whether to store the mask
unconditionally as a bitmask or as one or more vector masks. (array of bools is
another choice, but never a good fit.)
Thanks to AVX512, the native mask representation on x86 "depends". Any choice
for simd_mask<T, fixed_size<N>> leads to bitmask <-> vector masks conversions.
GCC decided to implement compares of vector builtins to unconditionally return
vector masks, even if an AVX512 compare instruction is used. The optimizer then
sometimes recognizes the conversion back to a bitmask and eliminates the
conversions. Consequently, fixed_size simd_masks currently achieve better
optimization when implemented as vector masks. Through this PR, I want to find
out whether using bitmasks is a feasible solution.
I understand the pain involved in making this work generically. That's why I'm
suggesting to only support this optimization when a special conversion builtin
is used. Thus, GCC wouldn't have to recognize all possible patterns to convert
bitmask <-> vector mask. And, through the use of __builtin_vector_to_bitmask
the caller implies that the argument is a vector mask (every other input is
UB).
>From gcc-bugs-return-610766-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 09:37:58 2018
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Subject: [Bug tree-optimization/18501] [6/7/8/9 Regression] Missing 'used uninitialized' warning (CCP)
Date: Tue, 24 Jul 2018 09:59:00 -0000
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Michael Veksler <mickey.veksler at gmail dot com> changed:
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--- Comment #84 from Michael Veksler <mickey.veksler at gmail dot com> ---
Ping.
At least -Wmaybe-uninitialized should emit warnings.
This still happens on the trunk (gcc version 9.0.0 20180723 (experimental)
(GCC-Explorer-Build)) :
int f(int a)
{
int ret;
if (a) {
ret = 1;
}
return ret;
}
No warning, including with -Wmaybe-uninitialized. All other compilers warn
about this (at least clang and Visual C++).
>From gcc-bugs-return-610767-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 09:59:50 2018
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Tue, 24 Jul 2018 10:21:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
So it doesn't seem to be the same issue as the last one but with SCC size != 1
since the following doesn't make it ICE for me:
Index: lto/lto.c
===================================================================
--- lto/lto.c (revision 262940)
+++ lto/lto.c (working copy)
@@ -1670,6 +1670,24 @@ unify_scc (struct data_in *data_in, unsi
{
lto_maybe_register_decl (data_in, map[2*i],
(uintptr_t)map2[2*i]);
+ tree prevail = map[2*i];
+ if (dref_queue.length () != 0
+ && ((DECL_P (prevail)
+ && TREE_CODE (prevail) != FIELD_DECL
+ && TREE_CODE (prevail) != DEBUG_EXPR_DECL
+ && TREE_CODE (prevail) != TYPE_DECL)
+ || TREE_CODE (prevail) == BLOCK))
+ {
+ tree nonprevail = streamer_tree_cache_get_tree (cache,
(uintptr_t)map2[2*i]);
+ const char *sym;
+ unsigned HOST_WIDE_INT off;
+ if (!debug_hooks->die_ref_for_decl (prevail, &sym, &off))
+ {
+ for (unsigned k = 0; k < dref_queue.length (); ++k)
+ if (dref_queue[k].decl == nonprevail)
+ gcc_unreachable ();
+ }
+ }
streamer_tree_cache_replace_tree (cache, map[2*i],
(uintptr_t)map2[2*i]);
}
For the testcase we are missing a DIE for the context of operator().constprop
which non-type-context is $2 = <function_decl 0x7ffff6696700 FilterMatches>
Ah, we create operator().constprop late where we _do_ have the DIE for
FilterMatches available but we do not look at DECL_ABSTRACT_ORIGIN
when setting a context die. Instead we start with comp_unit_die ()
and run into
static void
dwarf2out_decl (tree decl)
{
dw_die_ref context_die = comp_unit_die ();
switch (TREE_CODE (decl))
{
...
case FUNCTION_DECL:
/* If we're a nested function, initially use a parent of NULL; if we're
a plain function, this will be fixed up in decls_for_scope. If
we're a method, it will be ignored, since we already have a DIE. */
if (decl_function_context (decl)
/* But if we're in terse mode, we don't care about scope. */
&& debug_info_level > DINFO_LEVEL_TERSE)
context_die = NULL;
break;
my gut feeling would be to guard the above with early_dwarf ...
The other option would be to assign a more appropriate DECL_CONTEXT to
clones rather than simply copying the DECL_CONTEXT of the origin.
So the following otherwise untested patch fixes the testcase:
Index: dwarf2out.c
===================================================================
--- dwarf2out.c (revision 262940)
+++ dwarf2out.c (working copy)
@@ -26703,7 +26703,8 @@ dwarf2out_decl (tree decl)
/* If we're a nested function, initially use a parent of NULL; if we're
a plain function, this will be fixed up in decls_for_scope. If
we're a method, it will be ignored, since we already have a DIE. */
- if (decl_function_context (decl)
+ if (early_dwarf
+ && decl_function_context (decl)
/* But if we're in terse mode, we don't care about scope. */
&& debug_info_level > DINFO_LEVEL_TERSE)
context_die = NULL;
>From gcc-bugs-return-610768-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 10:21:19 2018
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Subject: [Bug libstdc++/83938] Speed up inplace_merge() algorithm & fix inefficient logic
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François Dumont <fdumont at gcc dot gnu.org> changed:
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>From gcc-bugs-return-610769-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 10:25:12 2018
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Subject: [Bug testsuite/86649] [9 regression] g++.dg/tree-ssa/pr19476-1.C fails starting with r262928
Date: Tue, 24 Jul 2018 10:47:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Jul 24 10:24:00 2018
New Revision: 262942
URL: https://gcc.gnu.org/viewcvs?rev=262942&root=gcc&view=rev
Log:
PR testsuite/86649
* g++.dg/tree-ssa-/pr19476-1.C: Check dom2 dump instead of ccp1.
* g++.dg/tree-ssa-/pr19476-5.C: Likewise.
* g++.dg/tree-ssa-/pr19476-6.C: New test.
* g++.dg/tree-ssa-/pr19476-7.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/tree-ssa/pr19476-6.C
trunk/gcc/testsuite/g++.dg/tree-ssa/pr19476-7.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/tree-ssa/pr19476-1.C
trunk/gcc/testsuite/g++.dg/tree-ssa/pr19476-5.C
trunk/libgomp/ChangeLog
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Subject: [Bug libstdc++/86655] New: std::assoc_legendre should not constrain the value of m
Date: Tue, 24 Jul 2018 10:55:00 -0000
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Bug ID: 86655
Summary: std::assoc_legendre should not constrain the value of
m
Product: gcc
Version: 9.0
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https://wg21.link/c.math#sf.cmath.assoc_legendre leaves m unconstrained.
__detail::__assoc_legendre_p documents "@param m The order of the associated
Legendre function. @f$ m <= l @f$." and throws a domain error if m > l.
IIUC correctly, m > l simply implies that the result of std::assoc_legendre is
0. Which is why Wikipedia documents "This equation has nonzero solutions that
are nonsingular on [−1, 1] only if ℓ and m are integers with 0 ≤ m ≤ ℓ".
If this is correct, then the m <= l restriction should be removed. Otherwise,
we'd need to file a defect report to the C++ standard to constrain m.
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Subject: [Bug libstdc++/86655] std::assoc_legendre should not constrain the value of m
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Ed, could you comment please?
>From gcc-bugs-return-610772-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 10:55:52 2018
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Subject: [Bug c++/86652] pointer to function type cannot have 'const' qualifier
Date: Tue, 24 Jul 2018 10:58:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> This seems like the const is applying to the function (not the function type
> that it is returning).
Indeed:
struct C {
template <typename> int (*f())() const;
};
int main()
{
const C c;
auto f = c.f<int>();
return f == nullptr;
}
c.cc: In function 'int main()':
c.cc:9:21: error: passing 'const C' as 'this' argument discards qualifiers
[-fpermissive]
auto f = c.f<int>();
^
c.cc:3:29: note: in call to 'int (* C::f())() [with <template-parameter-1-1>
= int]'
template <typename> int (*f())() const;
^
That would be correct given:
template <typename> int (*f() const)();
so g++ is parsing the declarator incorrectly.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-610774-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 11:09:44 2018
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Subject: [Bug fortran/57160] short-circuit IF only with -ffrontend-optimize
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--- Comment #11 from janus at gcc dot gnu.org ---
Patch posted at: https://gcc.gnu.org/ml/fortran/2018-07/msg00086.html
>From gcc-bugs-return-610775-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 11:16:54 2018
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Subject: [Bug fortran/57160] short-circuit IF only with -ffrontend-optimize
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--- Comment #12 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Patch posted at: https://gcc.gnu.org/ml/fortran/2018-07/msg00086.html
Don't abuse any optimization option.
>From gcc-bugs-return-610776-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 11:19:37 2018
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Subject: [Bug fortran/86527] gfortran console I/O not working
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Likely a cygwin64 problem. Did you report upstream?
>From gcc-bugs-return-610777-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 11:28:26 2018
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Subject: [Bug fortran/86470] ICE with OMP
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from at least 5.5.0 (I don't have the patience to track older
versions of omp_lib.mod).
>From gcc-bugs-return-610778-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 11:33:25 2018
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Subject: [Bug fortran/86545] [6/7/8/9 Regression] ICE in transfer_expr on invalid WRITE statement
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed.
>From gcc-bugs-return-610779-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 11:36:57 2018
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Subject: [Bug fortran/86545] [6/7/8/9 Regression] ICE in transfer_expr on invalid WRITE statement
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> gfortran 4.8 rejects it without ICE:
>
> character(len=:), allocatable :: cs
> 1
> Error: Deferred-length character component 'cs' at (1) is not yet supported
Does not look as a regression.
>From gcc-bugs-return-610780-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 11:38:02 2018
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Subject: [Bug other/86656] New: Issues found with -fsanitizedress
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86656
Bug ID: 86656
Summary: Issues found with -fsanitize=address
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: meta-bug
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
>From gcc-bugs-return-610781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 11:46:08 2018
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Subject: [Bug objc/80798] Dynamic stack buffer (alloca) overflow in ObjC compiler.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80798
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
Blocks| |86656
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Max can you please send the patch?
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86656
[Bug 86656] Issues found with -fsanitize=address
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Subject: [Bug fortran/86657] New: ASAN error: heap-use-after-free gcc/fortran/symbol.c:1762 in gfc_add_flavor
Date: Tue, 24 Jul 2018 11:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86657
Bug ID: 86657
Summary: ASAN error: heap-use-after-free
gcc/fortran/symbol.c:1762 in gfc_add_flavor
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Following test-case trigger that:
$ ./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/dec_type_print_2.f03 -c
-fdec
=================================================================
==20454==ERROR: AddressSanitizer: heap-use-after-free on address 0x613000004918
at pc 0x000000b59be3 bp 0x7fffffffcb70 sp 0x7fffffffcb68
READ of size 1 at 0x613000004918 thread T0
#0 0xb59be2 in gfc_add_flavor(symbol_attribute*, sym_flavor, char const*,
locus*) /home/marxin/Programming/gcc2/gcc/fortran/symbol.c:1762
#1 0xb59672 in gfc_add_generic(symbol_attribute*, char const*, locus*)
/home/marxin/Programming/gcc2/gcc/fortran/symbol.c:1697
#2 0x9025e2 in gfc_match_derived_decl()
/home/marxin/Programming/gcc2/gcc/fortran/decl.c:10009
#3 0x901d17 in gfc_match_type(gfc_statement*)
/home/marxin/Programming/gcc2/gcc/fortran/decl.c:9900
#4 0xa5bcdb in decode_statement
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:418
#5 0xa6242f in next_free
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:1234
#6 0xa63365 in next_statement
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:1466
#7 0xa6b82b in parse_spec
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:3858
#8 0xa73eeb in parse_progunit
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:5671
#9 0xa770f0 in gfc_parse_file()
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:6211
#10 0xb86eb6 in gfc_be_parse_file
/home/marxin/Programming/gcc2/gcc/fortran/f95-lang.c:204
#11 0x2255717 in compile_file
/home/marxin/Programming/gcc2/gcc/toplev.c:455
#12 0x225d323 in do_compile /home/marxin/Programming/gcc2/gcc/toplev.c:2161
#13 0x225dba2 in toplev::main(int, char**)
/home/marxin/Programming/gcc2/gcc/toplev.c:2296
#14 0x49a800e in main /home/marxin/Programming/gcc2/gcc/main.c:39
#15 0x7ffff59fcfea in __libc_start_main ../csu/libc-start.c:308
#16 0x866759 in _start
(/home/marxin/Programming/gcc2/objdir/gcc/f951+0x866759)
0x613000004918 is located 280 bytes inside of 344-byte region
[0x613000004800,0x613000004958)
freed by thread T0 here:
#0 0x7ffff6efc2f0 in __interceptor_free (/usr/lib64/libasan.so.5+0xeb2f0)
#1 0xb6148f in gfc_free_symbol(gfc_symbol*)
/home/marxin/Programming/gcc2/gcc/fortran/symbol.c:3081
#2 0xb61718 in gfc_release_symbol(gfc_symbol*)
/home/marxin/Programming/gcc2/gcc/fortran/symbol.c:3108
#3 0xb65882 in gfc_restore_last_undo_checkpoint()
/home/marxin/Programming/gcc2/gcc/fortran/symbol.c:3701
#4 0xb659fd in gfc_undo_symbols()
/home/marxin/Programming/gcc2/gcc/fortran/symbol.c:3732
#5 0xa5bc74 in decode_statement
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:414
#6 0xa6242f in next_free
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:1234
#7 0xa63365 in next_statement
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:1466
#8 0xa6b82b in parse_spec
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:3858
#9 0xa73eeb in parse_progunit
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:5671
#10 0xa770f0 in gfc_parse_file()
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:6211
#11 0xb86eb6 in gfc_be_parse_file
/home/marxin/Programming/gcc2/gcc/fortran/f95-lang.c:204
#12 0x2255717 in compile_file
/home/marxin/Programming/gcc2/gcc/toplev.c:455
#13 0x225d323 in do_compile /home/marxin/Programming/gcc2/gcc/toplev.c:2161
#14 0x225dba2 in toplev::main(int, char**)
/home/marxin/Programming/gcc2/gcc/toplev.c:2296
#15 0x49a800e in main /home/marxin/Programming/gcc2/gcc/main.c:39
#16 0x7ffff59fcfea in __libc_start_main ../csu/libc-start.c:308
previously allocated by thread T0 here:
#0 0x7ffff6efc858 in calloc (/usr/lib64/libasan.so.5+0xeb858)
#1 0x4bda37e in xcalloc
/home/marxin/Programming/gcc2/libiberty/xmalloc.c:162
#2 0xb6173f in gfc_new_symbol(char const*, gfc_namespace*)
/home/marxin/Programming/gcc2/gcc/fortran/symbol.c:3119
#3 0xb62e24 in gfc_get_sym_tree(char const*, gfc_namespace*, gfc_symtree**,
bool) /home/marxin/Programming/gcc2/gcc/fortran/symbol.c:3369
#4 0xb63582 in gfc_get_symbol(char const*, gfc_namespace*, gfc_symbol**)
/home/marxin/Programming/gcc2/gcc/fortran/symbol.c:3422
#5 0x9c7782 in gfc_match_label()
/home/marxin/Programming/gcc2/gcc/fortran/match.c:617
#6 0x9d0a6c in gfc_match_forall(gfc_statement*)
/home/marxin/Programming/gcc2/gcc/fortran/match.c:2489
#7 0xa5bc2e in decode_statement
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:412
#8 0xa6242f in next_free
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:1234
#9 0xa63365 in next_statement
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:1466
#10 0xa6b82b in parse_spec
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:3858
#11 0xa73eeb in parse_progunit
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:5671
#12 0xa770f0 in gfc_parse_file()
/home/marxin/Programming/gcc2/gcc/fortran/parse.c:6211
#13 0xb86eb6 in gfc_be_parse_file
/home/marxin/Programming/gcc2/gcc/fortran/f95-lang.c:204
#14 0x2255717 in compile_file
/home/marxin/Programming/gcc2/gcc/toplev.c:455
#15 0x225d323 in do_compile /home/marxin/Programming/gcc2/gcc/toplev.c:2161
#16 0x225dba2 in toplev::main(int, char**)
/home/marxin/Programming/gcc2/gcc/toplev.c:2296
#17 0x49a800e in main /home/marxin/Programming/gcc2/gcc/main.c:39
#18 0x7ffff59fcfea in __libc_start_main ../csu/libc-start.c:308
SUMMARY: AddressSanitizer: heap-use-after-free
/home/marxin/Programming/gcc2/gcc/fortran/symbol.c:1762 in
gfc_add_flavor(symbol_attribute*, sym_flavor, char const*, locus*)
Shadow bytes around the buggy address:
0x0c267fff88d0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c267fff88e0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c267fff88f0: fd fd fd fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c267fff8900: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c267fff8910: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
=>0x0c267fff8920: fd fd fd[fd]fd fd fd fd fd fd fd fa fa fa fa fa
0x0c267fff8930: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c267fff8940: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c267fff8950: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c267fff8960: 00 00 00 fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c267fff8970: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==20454==ABORTING
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86656
[Bug 86656] Issues found with -fsanitize=address
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Subject: [Bug sanitizer/79635] Explain to translators what "asan" means
Date: Tue, 24 Jul 2018 11:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79635
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-07-24
CC| |dodji at gcc dot gnu.org,
| |dvyukov at gcc dot gnu.org,
| |jakub at gcc dot gnu.org,
| |kcc at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Component|c |sanitizer
Ever confirmed|0 |1
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Let me take it..
>From gcc-bugs-return-610784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 11:53:49 2018
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Subject: [Bug sanitizer/59962] --with-build-config=bootstrap-asan doesn't work
Date: Tue, 24 Jul 2018 11:59:00 -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|--- |FIXED
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
The patch is in trunk, thus closing.
>From gcc-bugs-return-610785-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 11:59:44 2018
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Subject: [Bug lto/86651] lto-wrapper.exe: fatal error: simple_object_copy_lto_debug_sections not implemented: Invalid argument
Date: Tue, 24 Jul 2018 12:00:00 -0000
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--- Comment #2 from jwjagersma at gmail dot com ---
(In reply to U.Mutlu from comment #1)
> Do you get the same error if you leave out the --disable-plugin ?
Yes, same error.
>From gcc-bugs-return-610786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 12:00:05 2018
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Subject: [Bug fortran/86657] ASAN error: heap-use-after-free gcc/fortran/symbol.c:1762 in gfc_add_flavor
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-07-24
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed for 8.1.0 and trunk (9.0).
>From gcc-bugs-return-610788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 12:09:14 2018
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Subject: [Bug target/86547] s390x: Maximum number of LRA assignment passes is achieved (30) when compiling a small inline assembler snippet
Date: Tue, 24 Jul 2018 12:09:00 -0000
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--- Comment #3 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
I think I found an issue in spill_hard_reg_in_range().
The idea behind the rclass loop in spill_hard_reg_in_range() seems to
be: find a hard_regno, which in general conflicts with reload regno,
but does not do so between `from` and `to`, and then do the live range
splitting based on this information. To check the absence of conflicts,
we make use of insn_bitmap, which does not contain insns which clobber
the hard_regno.
My current solution is: when selecting the hard_regno, make sure no insn
between `from` and `to` clobbers it. This makes the compile fail with
‘asm’ operand has impossible constraints instead of an ICE, which is an
improvement, but is still not perfect.
>From gcc-bugs-return-610787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 12:02:37 2018
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Subject: [Bug c++/86648] [9 Regression] ICE on class template argument deduction
Date: Tue, 24 Jul 2018 12:09:00 -0000
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--- Comment #2 from Boris <boris_oncev at hotmail dot com> ---
(In reply to Marek Polacek from comment #1)
> I don't see any ICE with -std=c++17.
Did you try it on godbolt, or locally(maybe you have newer version than
godbolt) ?
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Subject: [Bug target/86547] s390x: Maximum number of LRA assignment passes is achieved (30) when compiling a small inline assembler snippet
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--- Comment #4 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
Created attachment 44430
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44430&action=edit
patch v1
>From gcc-bugs-return-610790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 12:14:28 2018
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Tue, 24 Jul 2018 12:33:00 -0000
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
With the dwarf2out.c file patches, now the library builds. But it took my ~30
minutes of linking, seeing perf top:
36.96% lto1 [.] lookup_external_ref
18.60% lto1 [.] hash_table<external_ref_hasher,
xcallocator>::find_empty_slot_for_expand
4.68% as [.] hash_lookup.isra.0
1.92% as [.] resolve_symbol_value
0.74% lto1 [.] mark_used_flags
0.72% as [.] relax_segment
and debug info of the shared library looks huge:
bloaty ./obj-x86_64-pc-linux-gnu/toolkit/library/libxul.so
VM SIZE FILE SIZE
-------------- --------------
0.0% 0 .debug_info 937Mi 52.7%
0.0% 0 .debug_loc 339Mi 19.1%
0.0% 0 .debug_str 159Mi 9.0%
0.0% 0 .debug_ranges 110Mi 6.2%
0.0% 0 .debug_line 69.0Mi 3.9%
68.3% 65.3Mi .text 65.3Mi 3.7%
0.0% 0 .strtab 33.1Mi 1.9%
0.0% 0 .symtab 24.4Mi 1.4%
0.0% 0 .debug_abbrev 9.99Mi 0.6%
8.3% 7.91Mi .rela.dyn 7.91Mi 0.4%
8.0% 7.67Mi .rodata 7.67Mi 0.4%
6.2% 5.89Mi .eh_frame 5.89Mi 0.3%
4.1% 3.90Mi .data.rel.ro 3.90Mi 0.2%
1.7% 1.59Mi .dynstr 1.59Mi 0.1%
1.4% 1.35Mi .eh_frame_hdr 1.35Mi 0.1%
1.0% 990Ki [Other] 1003Ki 0.1%
0.6% 616Ki .bss 0 0.0%
0.4% 398Ki .dynsym 398Ki 0.0%
0.0% 0 .debug_pubtypes 349Ki 0.0%
0.0% 0 .debug_pubnames 285Ki 0.0%
0.0% 23 [None] 0 0.0%
100.0% 95.6Mi TOTAL 1.74Gi 100.0%
>From gcc-bugs-return-610791-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 12:33:20 2018
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Subject: [Bug debug/68836] GCC can't properly emit debug info for function arguments in a back-trace when using -Og
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aoliva at gcc dot gnu.org
--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #3)
> On Tue, 24 Jul 2018, egallager at gcc dot gnu.org wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68836
> >
> > Eric Gallager <egallager at gcc dot gnu.org> changed:
> >
> > What |Removed |Added
> > ----------------------------------------------------------------------------
> > CC| |egallager at gcc dot gnu.org
> >
> > --- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
> > (In reply to Richard Biener from comment #1)
> > > Without a (guality?) testcase there's nothing to do here. But quite likely
> > > the reason is inlining. Alex new work _might_ help here.
> >
> > Which new work?
>
> stmt frontiers and location views
ah right THAT alex
>From gcc-bugs-return-610792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 12:33:38 2018
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Subject: [Bug gcov-profile/85377] [GCOV] Wrong coverage with label and if(cond) break in while(1)
Date: Tue, 24 Jul 2018 12:46:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|ASSIGNED |NEW
Assignee|marxin at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
The loop while (1) is folded away and we end up with:
<bb 2> :
i_2 = 2;
<bb 3> :
L1:
g.0_1 = g;
if (g.0_1 <= 0)
goto <bb 4>; [INV]
else
goto <bb 5>; [INV]
<bb 4> :
goto <bb 6>; [INV]
<bb 5> :
goto <bb 2>; [INV]
and
pr85377.gcno: 01450000: 9:LINES
pr85377.gcno: block 5:`pr85377.c':6
bb 5 has really assigned opening brace.
It's low priority issue..
>From gcc-bugs-return-610793-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 12:46:56 2018
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Subject: [Bug objc/80798] Dynamic stack buffer (alloca) overflow in ObjC compiler.
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chefmax at gcc dot gnu.org changed:
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--- Comment #3 from chefmax at gcc dot gnu.org ---
It seems that you have already fixed this bug by
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=259521 . Perhaps close
then as a dup?
>From gcc-bugs-return-610794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:00:53 2018
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Subject: [Bug gcov-profile/85179] [GCOV] A label followed with a blank statement is wrongly marked as not executed in Gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|ASSIGNED |NEW
Assignee|marxin at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, there are lines:
pr85179.gcno: 01450000: 10:LINES
pr85179.gcno: block 2:`pr85179.c':2, 3
pr85179.gcno: 01450000: 9:LINES
pr85179.gcno: block 3:`pr85179.c':5
pr85179.gcno: 01450000: 9:LINES
pr85179.gcno: block 4:`pr85179.c':4
pr85179.gcno: 01450000: 10:LINES
pr85179.gcno: block 5:`pr85179.c':5, 6
and CFG:
Released 0 names, 0.00%, removed 0 holes
main ()
{
int a.0_1;
<bb 2> :
a.0_1 = a;
if (a.0_1 != 0)
goto <bb 3>; [INV]
else
goto <bb 4>; [INV]
<bb 3> :
// predicted unlikely by goto predictor.
<bb 4> :
b:
return;
}
So line 5 belongs to 5, which is wrong.
Again, low priority.
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Subject: [Bug libstdc++/70966] new_delete_resource() has deinit lifetime issues.
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Jul 24 13:03:11 2018
New Revision: 262943
URL: https://gcc.gnu.org/viewcvs?rev=262943&root=gcc&view=rev
Log:
PR libstdc++/70966 fix lifetime bug for default resource
PR libstdc++/70966
* include/experimental/memory_resource (__get_default_resource): Use
placement new to create an object with dynamic storage duration.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/experimental/memory_resource
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Subject: [Bug c++/86648] [9 Regression] ICE on class template argument deduction
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Locally, with the latest trunk. Could've been fixed already.
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-610797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:10:53 2018
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Subject: [Bug gcov-profile/83616] [GCOV] The goto statement in nested for loop leads the label is wrongly marked as not executed in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, however not planning to fix that now ...
>From gcc-bugs-return-610799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:11:54 2018
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Subject: [Bug gcov-profile/83434] [GCOV] A label after a non-executed if statement is wrongly marked as not executed in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, but low priority.
>From gcc-bugs-return-610800-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:16:28 2018
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Subject: [Bug gcov-profile/85199] [GCOV] A cond-expr with a iterative variable in a for loop is marked as "-" in gcov
Date: Tue, 24 Jul 2018 13:17:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
CFG looks as follows:
Released 0 names, 0.00%, removed 0 holes
main ()
{
int b;
<bb 2> :
b_2 = 0;
goto <bb 4>; [INV]
<bb 3> :
b_3 = b_1 + 1;
<bb 4> :
# b_1 = PHI <b_2(2), b_3(3)>
if (b_1 <= 0)
goto <bb 3>; [INV]
else
goto <bb 5>; [INV]
<bb 5> :
return;
}
and line is mapped to:
pr83434.gcno: 01450000: 11:LINES
pr83434.gcno: block 2:`pr83434.c':1, 3, 4
pr85199.gcno: 01450000: 9:LINES
pr85199.gcno: block 4:`pr85199.c':4
which is slightly misleading. Setting low priority.
>From gcc-bugs-return-610802-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:19:06 2018
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Subject: [Bug gcov-profile/85297] [GCOV] "if(0) return;" is wrongly marked as executed when it is prefixed with a address operator "int c=0; &c;" and followed by "if(1) return;" in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
CFG is following:
main ()
{
int c;
int D.1903;
int _3;
<bb 2> :
c = 0;
<bb 3> :
_3 = 1;
// predicted unlikely by early return (on trees) predictor.
c ={v} {CLOBBER};
<bb 4> :
<L6>:
return _3;
}
so again it's optimized out.
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Subject: [Bug gcov-profile/85299] [GCOV] In for(;;), a "if(0) break;" statement is wrongly marked as executed when it is prefixed with an array declaration "int a[1];" and followed by "if(0) continue; break;" in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
CFG looks as follows:
Released 0 names, 0.00%, removed 0 holes
main ()
{
int a[1];
<bb 2> :
<bb 3> :
<bb 4> :
a ={v} {CLOBBER};
return;
}
So the dead code is optimized out.
>From gcc-bugs-return-610803-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:19:38 2018
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Subject: [Bug gcov-profile/85294] [GCOV] A "if(0) break;" statement is wrongly marked as executed when they are nested in for(;;) statement and prefixed with an struct declaration and followed by "if(1) break;" statement in gcov
Date: Tue, 24 Jul 2018 13:22:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
CFG:
main ()
{
struct s s1;
<bb 2> :
<bb 3> :
<bb 4> :
s1 ={v} {CLOBBER};
return;
}
again it's folded away the dead code.
>From gcc-bugs-return-610804-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:22:51 2018
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Subject: [Bug gcov-profile/85274] [GCOV] A return statement in if(0) block is wrongly marked as executed when they are nested in for(;1;) statement and prefixed with an struct declaration and followed by a assignment statement in gcov
Date: Tue, 24 Jul 2018 13:23:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
CFG is following:
Released 0 names, 0.00%, removed 0 holes
main ()
{
struct s g;
int D.1907;
int _1;
<bb 2> :
<bb 3> :
_1 = 0;
g ={v} {CLOBBER};
<bb 4> :
<L5>:
return _1;
}
again it's folded away.
>From gcc-bugs-return-610806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:25:07 2018
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Subject: [Bug gcov-profile/85225] [GCOV] An array reference in the for(;;) loop will lead the loop has incorrect execution times in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P5
Status|ASSIGNED |NEW
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, but very low priority.
>From gcc-bugs-return-610805-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:23:54 2018
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Tue, 24 Jul 2018 13:25:00 -0000
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--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 24 Jul 2018, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86654
>
> --- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
> With the dwarf2out.c file patches, now the library builds. But it took my ~30
> minutes of linking, seeing perf top:
>
> 36.96% lto1 [.] lookup_external_ref
> 18.60% lto1 [.] hash_table<external_ref_hasher,
> xcallocator>::find_empty_slot_for_expand
> 4.68% as [.] hash_lookup.isra.0
> 1.92% as [.] resolve_symbol_value
> 0.74% lto1 [.] mark_used_flags
> 0.72% as [.] relax_segment
So you applied the first patch as well? That was for debugging. And
it didn't fire? That's very good ;)
> and debug info of the shared library looks huge:
>
> bloaty ./obj-x86_64-pc-linux-gnu/toolkit/library/libxul.so
> VM SIZE FILE SIZE
> -------------- --------------
> 0.0% 0 .debug_info 937Mi 52.7%
> 0.0% 0 .debug_loc 339Mi 19.1%
> 0.0% 0 .debug_str 159Mi 9.0%
> 0.0% 0 .debug_ranges 110Mi 6.2%
> 0.0% 0 .debug_line 69.0Mi 3.9%
> 68.3% 65.3Mi .text 65.3Mi 3.7%
> 0.0% 0 .strtab 33.1Mi 1.9%
> 0.0% 0 .symtab 24.4Mi 1.4%
> 0.0% 0 .debug_abbrev 9.99Mi 0.6%
> 8.3% 7.91Mi .rela.dyn 7.91Mi 0.4%
> 8.0% 7.67Mi .rodata 7.67Mi 0.4%
> 6.2% 5.89Mi .eh_frame 5.89Mi 0.3%
> 4.1% 3.90Mi .data.rel.ro 3.90Mi 0.2%
> 1.7% 1.59Mi .dynstr 1.59Mi 0.1%
> 1.4% 1.35Mi .eh_frame_hdr 1.35Mi 0.1%
> 1.0% 990Ki [Other] 1003Ki 0.1%
> 0.6% 616Ki .bss 0 0.0%
> 0.4% 398Ki .dynsym 398Ki 0.0%
> 0.0% 0 .debug_pubtypes 349Ki 0.0%
> 0.0% 0 .debug_pubnames 285Ki 0.0%
> 0.0% 23 [None] 0 0.0%
> 100.0% 95.6Mi TOTAL 1.74Gi 100.0%
Not so bad I think. How's its size without LTO?
0.0% 0 .debug_info 67.1Mi 52.8%
58.2% 22.1Mi .text 22.1Mi 17.4%
but yes, PR83941 could be a reason for some bloat. You could try
"counting" the number of DIEs that just contain a single
DW_AT_abstract_origin attribute and no children.
>From gcc-bugs-return-610807-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:25:50 2018
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Subject: [Bug gcov-profile/85243] [GCOV] A return statement in the if(0) block is wrongly marked as executed when prefixed with an array declaration statement and followed by a "for(;cond-expression;) return; " statement when they are both in a independent block in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Again, due to folding, many of dead code.
>From gcc-bugs-return-610808-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:26:34 2018
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Subject: [Bug gcov-profile/85219] [GCOV] A "if(1) continue;" statement in a the else block of "if(1)" statement is wrongly marked as executed when surrounded by array delaration statement and break/continue statement in gcov
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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> ---
Again due to folding it's not precise.
>From gcc-bugs-return-610809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:29:34 2018
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Subject: [Bug gcov-profile/85273] [GCOV] return statement in else block of if(1) statement when there is an array declaration statement and a goto statement in gcov
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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> ---
CFG is following:
main ()
{
int c[1];
int D.1905;
int _1;
<bb 2> :
b:
<bb 3> :
_1 = 0;
c ={v} {CLOBBER};
<bb 4> :
<L6>:
return _1;
}
so again it's folded away.
>From gcc-bugs-return-610810-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:30:41 2018
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Subject: [Bug gcov-profile/85272] [GCOV] return statement in the else block of if(1) statement nested in a for(;;) statement is wrongly marked as executed in gcov
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
CFG:
main ()
{
int e[1];
int D.1908;
int _1;
<bb 2> :
<bb 3> :
_1 = 1;
e ={v} {CLOBBER};
<bb 4> :
<L9>:
return _1;
}
again a lot of code is folded away.
>From gcc-bugs-return-610811-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:31:02 2018
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Subject: [Bug c++/86648] [9 Regression] ICE on class template argument deduction
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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-610812-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:31:05 2018
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Subject: [Bug testsuite/86649] [9 regression] g++.dg/tree-ssa/pr19476-1.C fails starting with r262928
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-610813-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:32:39 2018
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Subject: [Bug gcov-profile/85245] [GCOV] A return statement in the if(0) block is wrongly marked as executed when they are nested in the true block of if (cond-expression) statement in gcov
Date: Tue, 24 Jul 2018 13:33:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Again, due to:
-: 6: if (0)
1: 7: return 0; // is executed
it's folded away.
>From gcc-bugs-return-610814-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:33:16 2018
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Subject: [Bug gcov-profile/85218] [GCOV] A return statement in the if(0) block is wrongly marked as executed when there is an array index and an {array declare statement} around it in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
CFG:
Released 0 names, 0.00%, removed 0 holes
main ()
{
int c[1];
int b[1];
int D.1904;
int _3;
<bb 2> :
b[0] = 0;
<bb 3> :
_3 = 1;
b ={v} {CLOBBER};
<bb 4> :
<L4>:
return _3;
}
so there's no body due to folding.
>From gcc-bugs-return-610815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:34:04 2018
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Subject: [Bug gcov-profile/85202] [GCOV] A continue statement in the body of the if(0) statement by following a if(1) statement will lead to incorrect code coverage in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Again due to folding, CFG is simplified.
>From gcc-bugs-return-610817-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:37:09 2018
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Subject: [Bug target/86651] lto-wrapper.exe: fatal error: simple_object_copy_lto_debug_sections not implemented: Invalid argument
Date: Tue, 24 Jul 2018 13:37:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |lto
CC| |rguenth at gcc dot gnu.org
Component|lto |target
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
This needs a fix similar to how darwin and mingw have fixed this issue, by
temporarily disabling debuginfo around asm_lto_{start,end}.
Not sure where msdosdjgpp target specific hooks reside.
Alternatively libiberty needs simple-object debug object-copy implemented for
whatever file format msdosdjgpp uses ([pe]coff?).
SVN r258123 might be a recipie to copy.
I guess config/i386/djgpp.[ch] is the correct place to add the hooks.
If you can produce a patch and verify if it works that would be nice.
>From gcc-bugs-return-610816-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:36:32 2018
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Subject: [Bug gcov-profile/85333] [GCOV] Builtin function is wrongly marked as "-" in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
CFG:
main ()
{
int D.2554;
int _3;
<bb 2> :
f (1, 2);
_3 = 0;
<bb 3> :
<L0>:
return _3;
}
so the builtin is folded away.
>From gcc-bugs-return-610818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:37:24 2018
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Subject: [Bug target/86651] [8/9 Regression] lto-wrapper.exe: fatal error: simple_object_copy_lto_debug_sections not implemented: Invalid argument
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.2
Summary|lto-wrapper.exe: fatal |[8/9 Regression]
|error: |lto-wrapper.exe: fatal
|simple_object_copy_lto_debu |error:
|g_sections not implemented: |simple_object_copy_lto_debu
|Invalid argument |g_sections not implemented:
| |Invalid argument
>From gcc-bugs-return-610819-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 13:50:48 2018
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Subject: [Bug bootstrap/68663] Build failure on AIX 7.1
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68663
The Written Word <bugzilla-gcc at thewrittenword dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from The Written Word <bugzilla-gcc at thewrittenword dot com> ---
(In reply to The Written Word from comment #9)
> (In reply to David Edelsohn from comment #7)
> > I use GCC 4.6 to bootstrap. It appears that the error is caused by the
> > "system" bootstrap compiler, which I think is GCC 4.4 in your case. It is
> > generating code with too large displacements.
> >
> > Also, some of the configure options are unusual.
>
> Ok, will try something later than 4.4. Thanks.
Ok, things are working now. Thanks.
>From gcc-bugs-return-610820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 14:09:36 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82005] Early lto debug not implemented on Darwin
Date: Tue, 24 Jul 2018 14:25:00 -0000
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--- Comment #42 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #40)
> Created attachment 44417 [details]
> Patch series to enable copying of early debug data.
>
First thanks for continuing to look into this (and sorry for the late
response).
> 1. Sorry about the long absence, equally long story...
>
> 2. The patches are *not* a fix for the problem, but might allow
> investigation of more possibilities.
>
> - 2.1) Small patch to lto-wrapper to make the debug data temp files easier
> to identify and to save them with -save-temps.
>
> - 2.2) Patch to simple object to allow the callback that identifies LTO
> debug sections to be specific to the file format handler.
>
> - 2.3) Patch to copy the LTO debug data in mach-o simple-object. This
> turns out to be quite heavy lifting despite the conceptual simplicity -
> since there was no support for symbols in the existing impl. of mach-o
> simple object. Anyway, it's functional.
>
> - 2.4) patch for lto-wrapper to allow mach-o LTO debug sections to be
> detected.
>
> 3. You can back out the change to darwin.c that disables debug for LTO, but
> the end result will still be the same (undefined symbols in a subtraction).
>
> * 3.1 this is not solved by any copying or linking, since it's an
> assembler diagnostic.
>
> * 3.2 The debug sections are not individually 0-based so we can't assume
> that.
>
> * 3.3 In a single mach-o object file, the assembler is able to elide the
> inter-section debug relocations, since the order of (and offsets between)
> the debug sections is known at assembly time. Thus a 'normal' mach-o object
> does not have inter-section relocs for the debug data. The debug linker
> (dsymutil) handles this.
>
> * 3.4 FWIW, the static linker produces a "0" output for linking objects
> which only contain debug data. I guess this could be regarded as a tool bug
> (since it *should* reference the original object files with stabs symbols,
> but doesn't). However, given 3.1 it's probably not worth getting too
> excited about.
>
> * 3.5 Alternative to messing with ld64 might be to patch dsymutil to
> provide the debug link equivalent of "-r" (still doesn't solve 3.1)
>
> 4. Where from here?
>
> - the patches are probably useful in their own right, even tho they don't
> solve the problem
>
> - maybe we can in some way regenerate relevant asm source from the copied
> debug data and find some way to include it in the LTO output files
That's something I considered. The scheme would basically be:
- at dwarf2out_early_finish time when we write-out LTO debug assembly
"switch" to an alternate asm_out_file and output the debug info there
with "real" section names
- given tooling cannot deal with a -c compile producing multiple .o files
as output the options are
* assemble the debug to a temporary .o file and include that wrapped
in a LTO section with the main .o output
* include the assembly in a LTO section with the main .o output
- at WPA time we have to somehow "offload" the early debug again. The
"simple" option is to produce a set of non-LTRANS-IL but "final"
object files, one per original compile unit. That works with both
object code and assembly. The alternative is to "link" the early
debug into a single "LTRANS" object, we'd have to re-write the
offloaded assembly, renaming all local labels (at least)
but neither of the above would solve out issue here - the early debug
would be still separate from the LTRANS object debug that refers to
it symbolically.
DWARF has some machinery to have "references" without locations but only
for type DIEs by using CRCs as references (and hoping for no collisions).
A new DWARF extension could do sth similar for CU references and
references relative to such imported CUs. Doesn't solve things for
old tools and darwin tools would have to support this extension.
> - we seem to be jumping through quite a few hoops here, presumably because
> it's too complex to emit the relevant data as markup into the LTO stream
> directly?
The issue is that we'd have to distribute _all_ early debug to _each_
LTRANS unit with late debug. That's N-fold duplication that I wanted
to avoid... but yes, with the assembly scheme from above you could
"prepend" each LTRANS unit with the "merged" early debug assembly.
(at least N is limited by --param lto-partitions which defaults to 32...)
Note that doing the assembling of the early debug during compile-time
and then have the linker at the final link pick up that debug from the
original objects as would have been my prefered way would be still the
best for compile-time and disk-space usage. But of course it wouldn't
work for DARWIN w/o assembler changes to support this kind of relocations.
So maybe for darwin the only practical way into the future is to have
that DWARF extension? The DWARF standard suggests that the linker should
be able to handle the kind of relocations we currently use though. Not
sure if maybe .debug_addr / DW_FORM_addrx* from split-dwarf can help
here but my understanding is that darwin doesn't support split-dwarf.
>From gcc-bugs-return-610821-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 14:25:21 2018
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Subject: [Bug middle-end/86627] [6/7/8/9 Regression] Signed 128-bit division by 2 no longer expanded to RTL
Date: Tue, 24 Jul 2018 14:38:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Jul 24 14:23:18 2018
New Revision: 262948
URL: https://gcc.gnu.org/viewcvs?rev=262948&root=gcc&view=rev
Log:
PR middle-end/86627
* expmed.c (expand_divmod): Punt if d == HOST_WIDE_INT_MIN
and size > HOST_BITS_PER_WIDE_INT. For size > HOST_BITS_PER_WIDE_INT
and abs_d == d, do the power of two handling if profitable.
* gcc.target/i386/pr86627.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr86627.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expmed.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Tue, 24 Jul 2018 14:39:00 -0000
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #8)
> On Tue, 24 Jul 2018, marxin at gcc dot gnu.org wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86654
> >
> > --- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
> > With the dwarf2out.c file patches, now the library builds. But it took my ~30
> > minutes of linking, seeing perf top:
> >
> > 36.96% lto1 [.] lookup_external_ref
> > 18.60% lto1 [.] hash_table<external_ref_hasher,
> > xcallocator>::find_empty_slot_for_expand
> > 4.68% as [.] hash_lookup.isra.0
> > 1.92% as [.] resolve_symbol_value
> > 0.74% lto1 [.] mark_used_flags
> > 0.72% as [.] relax_segment
>
> So you applied the first patch as well? That was for debugging. And
> it didn't fire? That's very good ;)
No, no, only the one-liner in dwarwf2out.c.
>
> > and debug info of the shared library looks huge:
> >
> > bloaty ./obj-x86_64-pc-linux-gnu/toolkit/library/libxul.so
> > VM SIZE FILE SIZE
> > -------------- --------------
> > 0.0% 0 .debug_info 937Mi 52.7%
> > 0.0% 0 .debug_loc 339Mi 19.1%
> > 0.0% 0 .debug_str 159Mi 9.0%
> > 0.0% 0 .debug_ranges 110Mi 6.2%
> > 0.0% 0 .debug_line 69.0Mi 3.9%
> > 68.3% 65.3Mi .text 65.3Mi 3.7%
> > 0.0% 0 .strtab 33.1Mi 1.9%
> > 0.0% 0 .symtab 24.4Mi 1.4%
> > 0.0% 0 .debug_abbrev 9.99Mi 0.6%
> > 8.3% 7.91Mi .rela.dyn 7.91Mi 0.4%
> > 8.0% 7.67Mi .rodata 7.67Mi 0.4%
> > 6.2% 5.89Mi .eh_frame 5.89Mi 0.3%
> > 4.1% 3.90Mi .data.rel.ro 3.90Mi 0.2%
> > 1.7% 1.59Mi .dynstr 1.59Mi 0.1%
> > 1.4% 1.35Mi .eh_frame_hdr 1.35Mi 0.1%
> > 1.0% 990Ki [Other] 1003Ki 0.1%
> > 0.6% 616Ki .bss 0 0.0%
> > 0.4% 398Ki .dynsym 398Ki 0.0%
> > 0.0% 0 .debug_pubtypes 349Ki 0.0%
> > 0.0% 0 .debug_pubnames 285Ki 0.0%
> > 0.0% 23 [None] 0 0.0%
> > 100.0% 95.6Mi TOTAL 1.74Gi 100.0%
>
> Not so bad I think. How's its size without LTO?
Oh, you were right, it's really improvement:
bloaty ./obj-x86_64-pc-linux-gnu/toolkit/library/libxul.so
VM SIZE FILE SIZE
-------------- --------------
0.0% 0 .debug_info 979Mi 48.6%
0.0% 0 .debug_loc 458Mi 22.8%
0.0% 0 .debug_str 158Mi 7.9%
0.0% 0 .debug_ranges 132Mi 6.6%
0.0% 0 .debug_line 112Mi 5.6%
67.6% 74.6Mi .text 74.6Mi 3.7%
0.0% 0 .strtab 37.8Mi 1.9%
0.0% 0 .symtab 14.0Mi 0.7%
0.0% 0 .debug_abbrev 11.4Mi 0.6%
7.9% 8.74Mi .eh_frame 8.74Mi 0.4%
7.7% 8.49Mi .rodata 8.49Mi 0.4%
7.7% 8.47Mi .rela.dyn 8.47Mi 0.4%
3.8% 4.20Mi .data.rel.ro 4.20Mi 0.2%
1.9% 2.05Mi .eh_frame_hdr 2.05Mi 0.1%
1.5% 1.65Mi .dynstr 1.65Mi 0.1%
0.9% 1.04Mi [Other] 1.32Mi 0.1%
0.0% 0 .debug_aranges 1.29Mi 0.1%
0.6% 650Ki .bss 0 0.0%
0.4% 413Ki .dynsym 413Ki 0.0%
0.0% 0 .debug_pubtypes 349Ki 0.0%
0.0% 15 [None] 0 0.0%
100.0% 110Mi TOTAL 1.97Gi 100.0%
diff:
./obj-x86_64-pc-linux-gnu2/toolkit/library/libxul.so --
./obj-x86_64-pc-linux-gnu/toolkit/library/libxul.so
VM SIZE FILE SIZE
++++++++++++++ GROWING ++++++++++++++
[ = ] 0 .symtab +10.3Mi +74%
[ = ] 0 .debug_str +500Ki +0.3%
+1.0% +16 .gnu.version_r +16 +1.0%
+53% +8 [None] 0 [ = ]
-------------- SHRINKING --------------
[ = ] 0 .debug_loc -119Mi -26.0%
[ = ] 0 .debug_line -43.1Mi -38.4%
[ = ] 0 .debug_info -42.1Mi -4.3%
[ = ] 0 .debug_ranges -22.8Mi -17.2%
-12.4% -9.24Mi .text -9.24Mi -12.4%
[ = ] 0 .strtab -4.73Mi -12.5%
-32.7% -2.86Mi .eh_frame -2.86Mi -32.7%
[ = ] 0 .debug_abbrev -1.46Mi -12.8%
[ = ] 0 .debug_aranges -1.28Mi -99.7%
-9.6% -830Ki .rodata -830Ki -9.6%
-34.1% -716Ki .eh_frame_hdr -716Ki -34.1%
-6.7% -578Ki .rela.dyn -578Ki -6.7%
-7.1% -304Ki .data.rel.ro -304Ki -7.1%
-3.6% -61.3Ki .dynstr -61.3Ki -3.6%
-5.3% -34.6Ki .bss 0 [ = ]
-13.4% -32.9Ki .data -32.9Ki -13.4%
-3.7% -15.4Ki .dynsym -15.4Ki -3.7%
-5.2% -13.4Ki .rela.plt -13.4Ki -5.2%
-3.8% -11.3Ki [Other] -11.8Ki -3.9%
-5.2% -8.92Ki .plt -8.92Ki -5.2%
-5.2% -4.46Ki .got.plt -4.46Ki -5.2%
-+-+-+-+-+-+-+ MIXED +-+-+-+-+-+-+-
-68.2% -161 [Unmapped] +531 +21%
-13.3% -14.7Mi TOTAL -238Mi -11.8%
>
> 0.0% 0 .debug_info 67.1Mi 52.8%
> 58.2% 22.1Mi .text 22.1Mi 17.4%
>
> but yes, PR83941 could be a reason for some bloat. You could try
> "counting" the number of DIEs that just contain a single
> DW_AT_abstract_origin attribute and no children.
Can you please prepare patch for that? Looks the non-LTO speed is slightly
faster, but still not much. Thus the patch looks promising.
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From: "sbergman at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86658] New: Debug mode: std::copy(..., std::inserter(...)) causes "Error: attempt to copy-construct an iterator from a singular iterator."
Date: Tue, 24 Jul 2018 14:57:00 -0000
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Bug ID: 86658
Summary: Debug mode: std::copy(..., std::inserter(...)) causes
"Error: attempt to copy-construct an iterator from a
singular iterator."
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: sbergman at redhat dot com
Target Milestone: ---
With recent GCC trunk:
> $ cat test.cc
> #define _GLIBCXX_DEBUG
> #include <algorithm>
> #include <iterator>
> #include <vector>
> int main() {
> std::vector<int> v1{0};
> std::vector<int> v2;
> std::copy(v1.begin(), v1.end(), std::inserter(v2, v2.end()));
> std::copy(v1.begin(), v1.end(), std::inserter(v2, v2.end()));
> }
>
> $ gcc/inst/bin/g++ --version
> g++ (GCC) 9.0.0 20180724 (experimental)
> Copyright (C) 2018 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>
> $ gcc/inst/bin/g++ test.cc
> $ LD_LIBRARY_PATH=/home/sbergman/gcc/inst/lib64 ./a.out
> /home/sbergman/gcc/inst/include/c++/9.0.0/debug/safe_iterator.h:140:
> In function:
> __gnu_debug::_Safe_iterator<_Iterator, _Sequence>::_Safe_iterator(const
> __gnu_debug::_Safe_iterator<_Iterator, _Sequence>&) [with _Iterator =
> __gnu_cxx::__normal_iterator<int*, std::__cxx1998::vector<int,
> std::allocator<int> > >; _Sequence = std::__debug::vector<int>]
>
> Error: attempt to copy-construct an iterator from a singular iterator.
>
> Objects involved in the operation:
> iterator "this" @ 0x0x7fff69d830c8 {
> type = __gnu_cxx::__normal_iterator<int*, std::__cxx1998::vector<int, std::allocator<int> > > (mutable iterator);
> state = singular;
> }
> iterator "other" @ 0x0x7fff69d83178 {
> type = __gnu_cxx::__normal_iterator<int*, std::__cxx1998::vector<int, std::allocator<int> > > (mutable iterator);
> state = singular;
> references sequence with type 'std::__debug::vector<int, std::allocator<int> >' @ 0x0x7fff69d83280
> }
> Aborted (core dumped)
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Tue, 24 Jul 2018 15:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86654
--- Comment #10 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 24 Jul 2018, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86654
>
> --- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
> (In reply to rguenther@suse.de from comment #8)
> > On Tue, 24 Jul 2018, marxin at gcc dot gnu.org wrote:
> >
> > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86654
> > >
> > > --- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
> > > With the dwarf2out.c file patches, now the library builds. But it took my ~30
> > > minutes of linking, seeing perf top:
> > >
> > > 36.96% lto1 [.] lookup_external_ref
> > > 18.60% lto1 [.] hash_table<external_ref_hasher,
> > > xcallocator>::find_empty_slot_for_expand
> > > 4.68% as [.] hash_lookup.isra.0
> > > 1.92% as [.] resolve_symbol_value
> > > 0.74% lto1 [.] mark_used_flags
> > > 0.72% as [.] relax_segment
> >
> > So you applied the first patch as well? That was for debugging. And
> > it didn't fire? That's very good ;)
>
> No, no, only the one-liner in dwarwf2out.c.
Ok, so optimize_external_refs is somehow expensive. Note it
wont' actually do anything but it still builds a map of
all external debug refs ...
I guess I should try to optimize this. Can you open a PR for this?
> >
> > > and debug info of the shared library looks huge:
> > >
> > > bloaty ./obj-x86_64-pc-linux-gnu/toolkit/library/libxul.so
> > > VM SIZE FILE SIZE
> > > -------------- --------------
> > > 0.0% 0 .debug_info 937Mi 52.7%
> > > 0.0% 0 .debug_loc 339Mi 19.1%
> > > 0.0% 0 .debug_str 159Mi 9.0%
> > > 0.0% 0 .debug_ranges 110Mi 6.2%
> > > 0.0% 0 .debug_line 69.0Mi 3.9%
> > > 68.3% 65.3Mi .text 65.3Mi 3.7%
> > > 0.0% 0 .strtab 33.1Mi 1.9%
> > > 0.0% 0 .symtab 24.4Mi 1.4%
> > > 0.0% 0 .debug_abbrev 9.99Mi 0.6%
> > > 8.3% 7.91Mi .rela.dyn 7.91Mi 0.4%
> > > 8.0% 7.67Mi .rodata 7.67Mi 0.4%
> > > 6.2% 5.89Mi .eh_frame 5.89Mi 0.3%
> > > 4.1% 3.90Mi .data.rel.ro 3.90Mi 0.2%
> > > 1.7% 1.59Mi .dynstr 1.59Mi 0.1%
> > > 1.4% 1.35Mi .eh_frame_hdr 1.35Mi 0.1%
> > > 1.0% 990Ki [Other] 1003Ki 0.1%
> > > 0.6% 616Ki .bss 0 0.0%
> > > 0.4% 398Ki .dynsym 398Ki 0.0%
> > > 0.0% 0 .debug_pubtypes 349Ki 0.0%
> > > 0.0% 0 .debug_pubnames 285Ki 0.0%
> > > 0.0% 23 [None] 0 0.0%
> > > 100.0% 95.6Mi TOTAL 1.74Gi 100.0%
> >
> > Not so bad I think. How's its size without LTO?
>
> Oh, you were right, it's really improvement:
>
> bloaty ./obj-x86_64-pc-linux-gnu/toolkit/library/libxul.so
> VM SIZE FILE SIZE
> -------------- --------------
> 0.0% 0 .debug_info 979Mi 48.6%
> 0.0% 0 .debug_loc 458Mi 22.8%
> 0.0% 0 .debug_str 158Mi 7.9%
> 0.0% 0 .debug_ranges 132Mi 6.6%
> 0.0% 0 .debug_line 112Mi 5.6%
> 67.6% 74.6Mi .text 74.6Mi 3.7%
> 0.0% 0 .strtab 37.8Mi 1.9%
> 0.0% 0 .symtab 14.0Mi 0.7%
> 0.0% 0 .debug_abbrev 11.4Mi 0.6%
> 7.9% 8.74Mi .eh_frame 8.74Mi 0.4%
> 7.7% 8.49Mi .rodata 8.49Mi 0.4%
> 7.7% 8.47Mi .rela.dyn 8.47Mi 0.4%
> 3.8% 4.20Mi .data.rel.ro 4.20Mi 0.2%
> 1.9% 2.05Mi .eh_frame_hdr 2.05Mi 0.1%
> 1.5% 1.65Mi .dynstr 1.65Mi 0.1%
> 0.9% 1.04Mi [Other] 1.32Mi 0.1%
> 0.0% 0 .debug_aranges 1.29Mi 0.1%
> 0.6% 650Ki .bss 0 0.0%
> 0.4% 413Ki .dynsym 413Ki 0.0%
> 0.0% 0 .debug_pubtypes 349Ki 0.0%
> 0.0% 15 [None] 0 0.0%
> 100.0% 110Mi TOTAL 1.97Gi 100.0%
>
> diff:
>
> ./obj-x86_64-pc-linux-gnu2/toolkit/library/libxul.so --
> ./obj-x86_64-pc-linux-gnu/toolkit/library/libxul.so
> VM SIZE FILE SIZE
> ++++++++++++++ GROWING ++++++++++++++
> [ = ] 0 .symtab +10.3Mi +74%
> [ = ] 0 .debug_str +500Ki +0.3%
> +1.0% +16 .gnu.version_r +16 +1.0%
> +53% +8 [None] 0 [ = ]
>
> -------------- SHRINKING --------------
> [ = ] 0 .debug_loc -119Mi -26.0%
> [ = ] 0 .debug_line -43.1Mi -38.4%
> [ = ] 0 .debug_info -42.1Mi -4.3%
> [ = ] 0 .debug_ranges -22.8Mi -17.2%
> -12.4% -9.24Mi .text -9.24Mi -12.4%
> [ = ] 0 .strtab -4.73Mi -12.5%
> -32.7% -2.86Mi .eh_frame -2.86Mi -32.7%
> [ = ] 0 .debug_abbrev -1.46Mi -12.8%
> [ = ] 0 .debug_aranges -1.28Mi -99.7%
> -9.6% -830Ki .rodata -830Ki -9.6%
> -34.1% -716Ki .eh_frame_hdr -716Ki -34.1%
> -6.7% -578Ki .rela.dyn -578Ki -6.7%
> -7.1% -304Ki .data.rel.ro -304Ki -7.1%
> -3.6% -61.3Ki .dynstr -61.3Ki -3.6%
> -5.3% -34.6Ki .bss 0 [ = ]
> -13.4% -32.9Ki .data -32.9Ki -13.4%
> -3.7% -15.4Ki .dynsym -15.4Ki -3.7%
> -5.2% -13.4Ki .rela.plt -13.4Ki -5.2%
> -3.8% -11.3Ki [Other] -11.8Ki -3.9%
> -5.2% -8.92Ki .plt -8.92Ki -5.2%
> -5.2% -4.46Ki .got.plt -4.46Ki -5.2%
>
> -+-+-+-+-+-+-+ MIXED +-+-+-+-+-+-+-
> -68.2% -161 [Unmapped] +531 +21%
>
> -13.3% -14.7Mi TOTAL -238Mi -11.8%
Heh, any "improvement" here is of course a possible loss
in debug info precision...
> > 0.0% 0 .debug_info 67.1Mi 52.8%
> > 58.2% 22.1Mi .text 22.1Mi 17.4%
> >
> > but yes, PR83941 could be a reason for some bloat. You could try
> > "counting" the number of DIEs that just contain a single
> > DW_AT_abstract_origin attribute and no children.
>
> Can you please prepare patch for that? Looks the non-LTO speed is slightly
> faster, but still not much. Thus the patch looks promising.
I don't have a good handle on that issue yet but I'll "test" the
patch shortly so firefox is fixed.
I suspect the best approach is to generate the ref DIEs lazily
on lookup... (this could get really messy though).
>From gcc-bugs-return-610825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 15:18:19 2018
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86646] Special member function 'cannot be defaulted' if type alias is used
Date: Tue, 24 Jul 2018 16:07:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
We reject the code because defaultable_fn_check doesn't like the copy ctor: it
asks copy_fn_p whether it is a copy ctor but it doesn't think so:
12997 else if (TYPE_REF_P (arg_type)
12998 && !TYPE_REF_IS_RVALUE (arg_type)
12999 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT
(d))
here both the main variant and the context are "struct Foo", but they compare
unequal.
Will poke some more at this.
>From gcc-bugs-return-610826-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 16:07:35 2018
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Subject: [Bug tree-optimization/86636] [9 Regression] ICE in json::string::string
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86636
--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Tue Jul 24 16:06:58 2018
New Revision: 262950
URL: https://gcc.gnu.org/viewcvs?rev=262950&root=gcc&view=rev
Log:
Fix segfault in -fsave-optimization-record (PR tree-optimization/86636)
There are various ways that it's possible for a gimple statement to
have an UNKNOWN_LOCATION, and for that UNKNOWN_LOCATION to be wrapped
in an ad-hoc location to capture inlining information.
For such a location, LOCATION_FILE (loc) is NULL.
Various places in -fsave-optimization-record were checking for
loc != UNKNOWN_LOCATION
and were passing LOCATION_FILE (loc) to code that assumed a non-NULL
filename, thus leading to segfaults for the above cases.
This patch updates the tests to use
LOCATION_LOCUS (loc) != UNKNOWN_LOCATION
instead, to look through ad-hoc location wrappers, fixing the segfaults.
It also adds various assertions to the affected code.
gcc/ChangeLog:
PR tree-optimization/86636
* json.cc (json::object::set): Fix comment. Add assertions.
(json::array::append): Move here from json.h. Add comment and an
assertion.
(json::string::string): Likewise.
* json.h (json::array::append): Move to json.cc.
(json::string::string): Likewise.
* optinfo-emit-json.cc
(optrecord_json_writer::impl_location_to_json): Assert that we
aren't attempting to write out UNKNOWN_LOCATION, or an ad-hoc
wrapper around it. Expand the location once, rather than three
times.
(optrecord_json_writer::inlining_chain_to_json): Fix the check for
UNKNOWN_LOCATION, to use LOCATION_LOCUS to look through ad-hoc
wrappers.
(optrecord_json_writer::optinfo_to_json): Likewise, in four
places. Fix some overlong lines.
gcc/testsuite/ChangeLog:
PR tree-optimization/86636
* gcc.c-torture/compile/pr86636.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr86636.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/json.cc
trunk/gcc/json.h
trunk/gcc/optinfo-emit-json.cc
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-610827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 16:10:22 2018
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Subject: [Bug tree-optimization/86636] [9 Regression] ICE in json::string::string
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Should be fixed by r262950.
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Subject: [Bug rtl-optimization/85925] [7/8/9 Regression] Mis-compilation at -02, masking with 257 goes wrong in combine
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Any progress with this PR?
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Subject: [Bug target/85610] Unable to optimize away mov followed by compare into a cmpb in case of atomic_load
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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CC| |segher at gcc dot gnu.org
--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
combine does not work across basic blocks, some other pass will have
to handle this.
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Subject: [Bug objc/80798] Dynamic stack buffer (alloca) overflow in ObjC compiler.
Date: Tue, 24 Jul 2018 17:00:00 -0000
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chefmax at gcc dot gnu.org changed:
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--- Comment #4 from chefmax at gcc dot gnu.org ---
Dup of pr85476.
*** This bug has been marked as a duplicate of bug 85476 ***
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Subject: [Bug objc/85476] ASAN error in finish_class ../../gcc/objc/objc-act.c:8006
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chefmax at gcc dot gnu.org changed:
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--- Comment #3 from chefmax at gcc dot gnu.org ---
*** Bug 80798 has been marked as a duplicate of this bug. ***
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Subject: [Bug other/86656] Issues found with -fsanitizedress
Date: Tue, 24 Jul 2018 17:35:00 -0000
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Bug 86656 depends on bug 80798, which changed state.
Bug 80798 Summary: Dynamic stack buffer (alloca) overflow in ObjC compiler.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80798
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Tue, 24 Jul 2018 18:08:00 -0000
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK, so patch at least regresses
FAIL: g++.dg/debug/dwarf2/lambda1.C -std=gnu++11 scan-assembler-times
DW_TAG_variable[^.]*.ascii "this.0" 2
FAIL: g++.dg/debug/dwarf2/lambda1.C -std=gnu++14 scan-assembler-times
DW_TAG_variable[^.]*.ascii "this.0" 2
but otherwise passes LTO bootstrap. Have to investigate the above tomorrow.
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86618] tree-vect-stmts.c:3340: ubsan error
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--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Tue Jul 24 18:08:19 2018
New Revision: 262951
URL: https://gcc.gnu.org/viewcvs?rev=262951&root=gcc&view=rev
Log:
Avoid &LOOP_VINFO_MASKS for bb vectorisation (PR 86618)
r262589 introduced another instance of the bug fixed in r258131.
2018-07-23 Richard Sandiford <richard.sandiford@arm.com>
gcc/
PR tree-optimization/86618
* tree-vect-stmts.c (vectorizable_call): Don't take the address
of LOOP_VINFO_MASKS (loop_vinfo) when loop_vinfo is null.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-vect-stmts.c
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From: "kelvin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86448] GCC 9 compiler generates slower code for spec 2006 milc on a power9 using -mcpu=power9 than using -mcpu=power8
Date: Tue, 24 Jul 2018 18:19:00 -0000
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--- Comment #2 from kelvin at gcc dot gnu.org ---
Using the GCC8 branch, svn version id 262483 (the same version tested by
Michael), I'm getting the following results:
-mcpu=power8 -mcpu=power9
28.57 28.79
28.41 28.61
28.54 28.21
28.53 28.55
29.02 28.59
28.54 27.34
28.25 26.63
28.56 29.13
delta Percent
average 28.5525 28.23125 0.32125 1.13%
As with my trunk measurements, I'm not seeing a 2% difference. Rnd I am seeing
that targeting power9 produces slightly better performance than targeting
power8.
It may be that we're running with different optimization flags. I used
OPTIMIZE = -Ofast -mcpu=power9 (or -mcpu=power8)
LDOPT = -m64 -Wl,-q -Wl,-rpath=%{BASE_DIR}/lib64
I'm inclined to close this issue unless Michael can point me to a different set
of options to explore...
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/86659] New: [9 regression] gnat.dg/sso/q[23].adb FAIL
Date: Tue, 24 Jul 2018 18:20:00 -0000
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Bug ID: 86659
Summary: [9 regression] gnat.dg/sso/q[23].adb FAIL
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Priority: P3
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CC: ebotcazou at gcc dot gnu.org
Target Milestone: ---
Target: sparc-sun-solaris2.*
Between 20180723 (r262933) and 20180724 (r262948) a couple of gnat.dg tests
started to FAIL on Solaris/SPARC (64-bit only):
+FAIL: gnat.dg/sso/q2.adb -O0 execution test
+FAIL: gnat.dg/sso/q2.adb -O1 -fno-inline execution test
+FAIL: gnat.dg/sso/q2.adb -O2 execution test
+FAIL: gnat.dg/sso/q2.adb -O3 -finline-functions execution test
+FAIL: gnat.dg/sso/q2.adb -Og -g execution test
+FAIL: gnat.dg/sso/q2.adb -Os execution test
+FAIL: gnat.dg/sso/q3.adb -O0 execution test
+FAIL: gnat.dg/sso/q3.adb -O1 -fno-inline execution test
+FAIL: gnat.dg/sso/q3.adb -O2 execution test
+FAIL: gnat.dg/sso/q3.adb -O3 -finline-functions execution test
+FAIL: gnat.dg/sso/q3.adb -Og -g execution test
+FAIL: gnat.dg/sso/q3.adb -Os execution test
In every case, the failure is
raised PROGRAM_ERROR : q2.adb:41 explicit raise
resp.
raised PROGRAM_ERROR : q3.adb:41 explicit raise
A1.S1 = 3 at this point.
I've not yet started a reghunt to identify the culprit.
Rainer
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Subject: [Bug ada/86659] [9 regression] gnat.dg/sso/q[23].adb FAIL
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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From: "sje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86538] GCC should define a macro to specify if LSE is enabled or not
Date: Tue, 24 Jul 2018 19:46:00 -0000
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--- Comment #2 from Steve Ellcey <sje at gcc dot gnu.org> ---
While I agree that we want users to use the __sync and atomic primitives,
it still seems like it would be useful in some cases to know if the LSE
operations are available and if GCC is generating code for them. I.e.
is TARGET_LSE set or not. I don't like the idea of hiding information
(or making it hard to determine) just because it might be misused.
I will probably create a patch for this and submit it to gcc-patches to see
if there is any support for it.
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Subject: [Bug c++/86598] Incorrect lexing of pp-numbers in C++11 due to hexfloat extension
Date: Tue, 24 Jul 2018 20:27:00 -0000
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--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Fri, 20 Jul 2018, zhonghao at pku dot org.cn wrote:
> g++ rejects the above code:
You don't say what options you are using, or what compiler version; please
include that in future bug reports that assert something about how the
compiler behaves. For standards conformance issues like this you should
be using strict conformance modes. I don't see this rejection with any of
-std=c++98, -std=c++11, -std=c++14. That would be what was fixed for
C++11/C++14 modes with r234213 ("Hex floats are new in C++1z."), and for
C++98 mode as bug 23827.
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Subject: [Bug libstdc++/86658] [9 Regression] Debug mode: std::copy(..., std::inserter(...)) causes "Error: attempt to copy-construct an iterator from a singular iterator."
Date: Tue, 24 Jul 2018 20:32:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-07-24
Known to work| |8.1.0
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Target Milestone|--- |9.0
Summary|Debug mode: std::copy(..., |[9 Regression] Debug mode:
|std::inserter(...)) causes |std::copy(...,
|"Error: attempt to |std::inserter(...)) causes
|copy-construct an iterator |"Error: attempt to
|from a singular iterator." |copy-construct an iterator
| |from a singular iterator."
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The problem is that __niter_wrap takes its argument by value, and in this case
that makes a copy of the output iterator after it's been invalidated.
I'll test this fix:
--- a/libstdc++-v3/include/bits/stl_algobase.h
+++ b/libstdc++-v3/include/bits/stl_algobase.h
@@ -288,7 +288,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// No need to wrap, iterator already has the right type.
template<typename _Iterator>
inline _Iterator
- __niter_wrap(_Iterator, _Iterator __res)
+ __niter_wrap(const _Iterator&, _Iterator __res)
{ return __res; }
// All of these auxiliary structs serve two purposes. (1) Replace
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Subject: [Bug fortran/58224] -fcheck=pointer should detect that an unallocated allocatable data-target is forbidden
Date: Tue, 24 Jul 2018 20:49:00 -0000
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janus at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
Keywords| |diagnostic
CC| |janus at gcc dot gnu.org
--- Comment #2 from janus at gcc dot gnu.org ---
Very related: -fcheck-pointer should also detect when a null pointer is
deferenced, like here:
integer, pointer :: p => null()
print *,p
end
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Subject: [Bug libstdc++/86658] [9 Regression] Debug mode: std::copy(..., std::inserter(...)) causes "Error: attempt to copy-construct an iterator from a singular iterator."
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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> ---
Should be fixed now - thanks for the report.
>From gcc-bugs-return-610843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 20:49:55 2018
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Subject: [Bug libstdc++/86658] [9 Regression] Debug mode: std::copy(..., std::inserter(...)) causes "Error: attempt to copy-construct an iterator from a singular iterator."
Date: Tue, 24 Jul 2018 21:02:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Jul 24 20:49:10 2018
New Revision: 262952
URL: https://gcc.gnu.org/viewcvs?rev=262952&root=gcc&view=rev
Log:
PR libstdc++/86658 fix __niter_wrap to not copy invalid iterators
An output iterator passed as the unused first argument to __niter_wrap
might have already been invalidated, so don't copy it.
PR libstdc++/86658
* include/bits/stl_algobase.h (__niter_wrap<_Iterator>): Pass unused
parameter by reference, to avoid copying invalid iterators.
* testsuite/25_algorithms/copy/86658.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/25_algorithms/copy/86658.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/stl_algobase.h
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Subject: [Bug middle-end/86631] [9 Regression] missing -Walloc-size-larger-than on ILP32 hosts
Date: Tue, 24 Jul 2018 21:11:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Sun, 22 Jul 2018, msebor at gcc dot gnu.org wrote:
> In ILP32 it sets the limit for the warning to LLONG_MAX which is greater than
> the value of PTRDIFF_MAX on the targer (the intended setting). Unless there
> is a macro that on the hosts gives the corresponding limit it might be
> necessary to either reserve a value as special (such as HOST_WIDE_INT_MAX), or
> to enhance the option argument parser to recognize and interpret such macros so
> that Walloc-size-larger-than=PTRDIFF_MAX can be set in c.opt and interpreted to
> mean the same thing regardless of the target.
Note that target PTRDIFF_MAX may depend on architecture-specific
command-line options, so you'd need to make sure the initialization
ordering is correct (target options processed and built-in types
registered, so that it's possible to look up PTRDIFF_TYPE by name and so
find out its max value).
>From gcc-bugs-return-610845-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 21:11:11 2018
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Subject: [Bug middle-end/86631] [9 Regression] missing -Walloc-size-larger-than on ILP32 hosts
Date: Tue, 24 Jul 2018 21:31:00 -0000
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
I just happen to be looking into this. Is there a way to defer the option
processing until after all this info is available? (When things like
ptrdiff_type_node are already initialized, or at least when the target-specific
data used to initialize them are set up.)
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Subject: [Bug fortran/86599] Problems building libgfortran from 7.2.0 on HP-UX 11.31/PA
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86599
--- Comment #3 from The Written Word <bugzilla-gcc at thewrittenword dot com> ---
6.4.0 and 7.3.0 exhibit the same error.
>From gcc-bugs-return-610847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 21:50:07 2018
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86660] New: libgomp.c++/for-15.C ICEs with nvptx offloading
Date: Tue, 24 Jul 2018 21:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86660
Bug ID: 86660
Summary: libgomp.c++/for-15.C ICEs with nvptx offloading
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: cesar at gcc dot gnu.org
Target Milestone: ---
I see the following ICE with libgomp.c++/for-15.C with nvptx-offloading:
lto1: internal compiler error: in input_varpool_node, at lto-cgraph.c:1393
0xc1d8d5 input_varpool_node
/openacc/trunk/gcc-mainline/gcc/lto-cgraph.c:1391
0xc1de1e input_cgraph_1
/openacc/trunk/gcc-mainline/gcc/lto-cgraph.c:1513
0xc1e9d5 input_symtab()
/openacc/trunk/gcc-mainline/gcc/lto-cgraph.c:1798
0x79d588 read_cgraph_and_symbols
/openacc/trunk/gcc-mainline/gcc/lto/lto.c:2917
0x79e9b8 lto_main()
/openacc/trunk/gcc-mainline/gcc/lto/lto.c:3400
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.
mkoffload: fatal error: x86_64-none-linux-gnu-accel-nvptx-none-gcc returned 1
exit status
compilation terminated.
lto-wrapper: fatal error:
/openacc/trunk/install/libexec/gcc/x86_64-none-linux-gnu/9.0.0//accel/nvptx-none/mkoffload
returned 1 exit status
compilation terminated.
/openacc/trunk/install/lib/gcc/x86_64-none-linux-gnu/9.0.0/../../../../x86_64-none-linux-gnu/bin/ld:
error: lto-wrapper failed
collect2: error: ld returned 1 exit status
I think I've seen similar problems in OpenACC, so this might be fixed in og8
already.
>From gcc-bugs-return-610848-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 21:57:09 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/86599] Problems building libgfortran from 7.2.0 on HP-UX 11.31/PA
Date: Tue, 24 Jul 2018 21:59:00 -0000
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The Written Word <bugzilla-gcc at thewrittenword dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|7.2.0 |8.1.0
--- Comment #4 from The Written Word <bugzilla-gcc at thewrittenword dot com> ---
hppa2.0w-hp-hpux11.31/libgfortran/kinds.h has:
...
typedef long double GFC_REAL_16;
typedef complex long double GFC_COMPLEX_16;
#define HAVE_GFC_REAL_16
#define HAVE_GFC_COMPLEX_16
#define GFC_REAL_16_HUGE 1.18973149535723176508575932662800702e4932l
#define GFC_REAL_16_LITERAL_SUFFIX l
#define GFC_REAL_16_LITERAL(X) (X ## l)
#define GFC_REAL_16_DIGITS 113
#define GFC_REAL_16_RADIX 2
And gcc/include-fixed/stdlib.h has:
#ifdef _INCLUDE_STDC__SOURCE_199901
# if defined(__ia64)
/* pragmas needed to support -B protected */
# pragma extern strtold
# endif /* __ia64 */
# ifndef _LONG_DOUBLE
# define _LONG_DOUBLE
# if !defined(__ia64) || !defined(_PROTOTYPES) || defined(_LONG_DOUBLE_STRUCT)
typedef struct {
uint32_t word1, word2, word3, word4;
} long_double;
extern long_double strtold __((const char * __restrict, char ** __restrict));
# else /* !__ia64 || !_PROTOTYPES || _LONG_DOUBLE_STRUCT */
# ifdef _INCLUDE_HPUX_SOURCE
typedef long double long_double;
# endif /* _INCLUDE_HPUX_SOURCE */
extern long double strtold __((const char * __restrict, char ** __restrict));
# endif /* !__ia64 ||!_PROTOTYPES ||_LONG_DOUBLE_STRUCT */
#endif /* _LONG_DOUBLE */
#endif /* _INCLUDE_STDC__SOURCE_199901 */
So, the strtold definition being used in io/read.c is:
extern long_double strtold __((const char * __restrict, char ** __restrict));
On HP-UX 11.23/PA, this isn't an issue because of the following in
fixincludes/inclhack.def:
/*
* HP-UX long_double
*/
fix = {
hackname = hpux_long_double;
mach = "*-*-hpux10*";
mach = "*-*-hpux11.[0123]*";
files = stdlib.h;
select = "extern[ \t]long_double[ \t]strtold";
bypass = "long_double_t";
sed = "/^#[ \t]*ifndef _LONG_DOUBLE/,/\\/\\* _LONG_DOUBLE \\*\\//D";
sed = "s/long_double/long double/g";
test_text = "# ifndef _LONG_DOUBLE\n"
"# define _LONG_DOUBLE\n"
" typedef struct {\n"
" unsigned int word1, word2, word3, word4;\n"
" } long_double;\n"
"# endif /* _LONG_DOUBLE */\n"
"extern long_double strtold(const char *, char **);\n";
};
We also have the following in the same file for HP-UX 11.31/PA:
/*
* We cannot use the above rule on 11.31 because it removes the strtold
* definition. ia64 is OK with no hack, PA needs some help.
*/
fix = {
hackname = hpux_long_double_2;
mach = "hppa*-*-hpux11.3*";
files = stdlib.h;
select = "#[ \t]*if[ \t]*!defined\\(__ia64\\) \\|\\| "
"defined\\(_PROTOTYPES\\) \\|\\| "
"defined\\(_LONG_DOUBLE_STRUCT\\)";
c_fix = format;
c_fix_arg = "# if !defined(_PROTOTYPES) || defined(_LONG_DOUBLE_STRUCT)";
test_text = "# if !defined(__ia64) || "
"!defined(_PROTOTYPES) || "
"defined(_LONG_DOUBLE_STRUCT)\n";
};
Maybe the above is no longer working?
>From gcc-bugs-return-610849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 21:59:13 2018
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86660] libgomp.c++/for-15.C ICEs with nvptx offloading
Date: Tue, 24 Jul 2018 22:05:00 -0000
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--- Comment #1 from cesar at gcc dot gnu.org ---
Created attachment 44431
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44431&action=edit
LTO graceful abort patch
With the LTO graceful abort patch, I now see this error:
lto1: error: Missing ‘results’
lto1: fatal error: errors during merging of translation units
compilation terminated.
mkoffload: fatal error: x86_64-none-linux-gnu-accel-nvptx-none-gcc returned 1
exit status
compilation terminated.
lto-wrapper: fatal error:
/openacc/trunk/install/libexec/gcc/x86_64-none-linux-gnu/9.0.0//accel/nvptx-none/mkoffload
returned 1 exit status
compilation terminated.
/openacc/trunk/install/lib/gcc/x86_64-none-linux-gnu/9.0.0/../../../../x86_64-none-linux-gnu/bin/ld:
error: lto-wrapper failed
collect2: error: ld returned 1 exit status
Why is results not being passed to the accelerator? Is it missing a target
declare or whatever its called in OpenMP?
>From gcc-bugs-return-610850-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 22:05:36 2018
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Subject: [Bug fortran/86599] Problems building libgfortran from 7.2.0 on HP-UX 11.31/PA
Date: Tue, 24 Jul 2018 22:34:00 -0000
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--- Comment #5 from The Written Word <bugzilla-gcc at thewrittenword dot com> ---
(In reply to The Written Word from comment #4)
> On HP-UX 11.23/PA, this isn't an issue because of the following in
> fixincludes/inclhack.def:
> /*
> * HP-UX long_double
> */
> fix = {
> hackname = hpux_long_double;
> mach = "*-*-hpux10*";
> mach = "*-*-hpux11.[0123]*";
> files = stdlib.h;
> select = "extern[ \t]long_double[ \t]strtold";
> bypass = "long_double_t";
> sed = "/^#[ \t]*ifndef _LONG_DOUBLE/,/\\/\\* _LONG_DOUBLE
> \\*\\//D";
> sed = "s/long_double/long double/g";
>
> test_text = "# ifndef _LONG_DOUBLE\n"
> "# define _LONG_DOUBLE\n"
> " typedef struct {\n"
> " unsigned int word1, word2, word3, word4;\n"
> " } long_double;\n"
> "# endif /* _LONG_DOUBLE */\n"
> "extern long_double strtold(const char *, char **);\n";
> };
Actually, it's:
/*
* HP-UX long_double
*/
fix = {
hackname = hpux_long_double;
mach = "*-*-hpux10*";
mach = "*-*-hpux11.[012]*";
files = stdlib.h;
select = "extern[ \t]long_double[ \t]strtold";
bypass = "long_double_t";
sed = "/^#[ \t]*ifndef _LONG_DOUBLE/,/\\/\\* _LONG_DOUBLE \\*\\//D";
sed = "s/long_double/long double/g";
test_text = "# ifndef _LONG_DOUBLE\n"
"# define _LONG_DOUBLE\n"
" typedef struct {\n"
" unsigned int word1, word2, word3, word4;\n"
" } long_double;\n"
"# endif /* _LONG_DOUBLE */\n"
"extern long_double strtold(const char *, char **);\n";
};
>From gcc-bugs-return-610851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 22:34:56 2018
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86661
Bug ID: 86661
Summary: g++ ICE:tree check: expected tree that contains ‘decl
minimal’ structure, have ‘overload’ in
note_name_declared_in_class, at cp/class.c:8288
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: helloqirun at gmail dot com
Target Milestone: ---
clang++ could compile it. It appears to be a recent regression.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 9.0.0 20180724 (experimental) [trunk revision 262942] (GCC)
$ g++-trunk abc.C
abc.C:5:31: internal compiler error: tree check: expected tree that contains
‘decl minimal’ structure, have ‘overload’ in note_name_declared_in_class, at
cp/class.c:8288
template <typename> void a();
^
0x78fc6e tree_contains_struct_check_failed(tree_node const*,
tree_node_structure_enum, char const*, int, char const*)
../../gcc/gcc/tree.c:9523
0x5e5d0c contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
../../gcc/gcc/tree.h:3228
0x5e5d0c note_name_declared_in_class(tree_node*, tree_node*)
../../gcc/gcc/cp/class.c:8288
0x90e2aa push_class_level_binding_1
../../gcc/gcc/cp/name-lookup.c:4656
0x90e2aa push_class_level_binding(tree_node*, tree_node*)
../../gcc/gcc/cp/name-lookup.c:4681
0x84d79d add_method(tree_node*, tree_node*, bool)
../../gcc/gcc/cp/class.c:1156
0x9b79e3 finish_member_declaration(tree_node*)
../../gcc/gcc/cp/semantics.c:3107
0x94fc67 cp_parser_template_declaration_after_parameters
../../gcc/gcc/cp/parser.c:27113
0x95047e cp_parser_explicit_template_declaration
../../gcc/gcc/cp/parser.c:27272
0x95047e cp_parser_template_declaration_after_export
../../gcc/gcc/cp/parser.c:27291
0x93b9fd cp_parser_member_declaration
../../gcc/gcc/cp/parser.c:23593
0x93c898 cp_parser_member_specification_opt
../../gcc/gcc/cp/parser.c:23520
0x93c898 cp_parser_class_specifier_1
../../gcc/gcc/cp/parser.c:22664
0x93e59d cp_parser_class_specifier
../../gcc/gcc/cp/parser.c:22926
0x93e59d cp_parser_type_specifier
../../gcc/gcc/cp/parser.c:16907
0x94b113 cp_parser_decl_specifier_seq
../../gcc/gcc/cp/parser.c:13748
0x9507b0 cp_parser_simple_declaration
../../gcc/gcc/cp/parser.c:13058
0x9558b2 cp_parser_declaration
../../gcc/gcc/cp/parser.c:12903
0x955cad cp_parser_declaration_seq_opt
../../gcc/gcc/cp/parser.c:12779
0x9563fa cp_parser_namespace_body
../../gcc/gcc/cp/parser.c:18753
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ cat abc.C
typedef int a;
namespace {
class b {
a c;
template <typename> void a();
};
}
>From gcc-bugs-return-610852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 22:45:51 2018
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86631] [9 Regression] missing -Walloc-size-larger-than on ILP32 hosts
Date: Tue, 24 Jul 2018 22:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86631
--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
The relevant point is after do_compile calls lang_dependent_init. Since
PTRDIFF_TYPE is a string, it's a pain to do anything with it until after
the front end has set up tree nodes (preferably those target macros would
become hooks returning enum values, but that still wouldn't help get the
information earlier, because converting itk_int conveniently to a max
value requires integer_type_node to have been set up).
>From gcc-bugs-return-610853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 22:47:45 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86662] New: msp430-elf segfault with -flto and -mlarge
Date: Tue, 24 Jul 2018 22:48:00 -0000
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Bug ID: 86662
Summary: msp430-elf segfault with -flto and -mlarge
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
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Segfault after endless recursion in gimple_get_alias_set, caused by canonical
type for __int20 being set to the unsigned variant, rather than signed variant
as expected.
testcase.i
int main(void)
{
__int20 n = 5;
}
./build/gcc/xgcc -B./build/gcc -nostdlib testcase.i -mlarge -flto
xgcc: internal compiler error: Segmentation fault signal terminated program
lto1
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Subject: [Bug c++/86663] New: g++ ICE with -std=c++11
Date: Tue, 24 Jul 2018 22:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86663
Bug ID: 86663
Summary: g++ ICE with -std=c++11
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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With "-std=c++11", it affects g++ as early as 4.8. Clang could compile it.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 9.0.0 20180724 (experimental) [trunk revision 262942] (GCC)
$ g++-trunk -std=c++11 abc.C
abc.C:2:7: internal compiler error: Segmentation fault
a<char>;
^
0xebf0cf crash_signal
../../gcc/gcc/toplev.c:325
0x98728c lookup_template_class_1
../../gcc/gcc/cp/pt.c:9618
0x98728c lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
../../gcc/gcc/cp/pt.c:9666
0x9b7b2d finish_template_type(tree_node*, tree_node*, int)
../../gcc/gcc/cp/semantics.c:3228
0x9360e4 cp_parser_template_id
../../gcc/gcc/cp/parser.c:15988
0x9361f3 cp_parser_class_name
../../gcc/gcc/cp/parser.c:22518
0x9428bf cp_parser_qualifying_entity
../../gcc/gcc/cp/parser.c:6601
0x9428bf cp_parser_nested_name_specifier_opt
../../gcc/gcc/cp/parser.c:6287
0x94b08e cp_parser_constructor_declarator_p
../../gcc/gcc/cp/parser.c:26669
0x94b08e cp_parser_decl_specifier_seq
../../gcc/gcc/cp/parser.c:13737
0x9507b0 cp_parser_simple_declaration
../../gcc/gcc/cp/parser.c:13058
0x9558b2 cp_parser_declaration
../../gcc/gcc/cp/parser.c:12903
0x955cad cp_parser_declaration_seq_opt
../../gcc/gcc/cp/parser.c:12779
0x955fa4 cp_parser_translation_unit
../../gcc/gcc/cp/parser.c:4603
0x955fa4 c_parse_file()
../../gcc/gcc/cp/parser.c:39117
0xa51fe0 c_common_parse_file()
../../gcc/gcc/c-family/c-opts.c:1138
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ g++-4.8 -std=c++11 abc.C
abc.C:2:7: internal compiler error: Segmentation fault
a<char>;
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.8/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccksnSsC.out file, please attach this to
your bugreport.
ERROR: Cannot create report: [Errno 17] File exists:
'/var/crash/_usr_lib_gcc_x86_64-linux-gnu_4.8_cc1plus.1000.crash'
$ cat abc.C
template <typename a> using a = a;
a<char>;
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Subject: [Bug target/86662] msp430-elf segfault with -flto and -mlarge
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--- Comment #1 from Jozef Lawrynowicz <jozef.l at mittosystems dot com> ---
Untested patch
diff --git a/gcc/tree.c b/gcc/tree.c
index bace9c8..54384ad 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -9802,8 +9802,7 @@ build_common_tree_nodes (bool signed_char)
int_n_trees[i].signed_type = make_signed_type (int_n_data[i].bitsize);
int_n_trees[i].unsigned_type = make_unsigned_type
(int_n_data[i].bitsize);
- if (int_n_data[i].bitsize > LONG_LONG_TYPE_SIZE
- && int_n_enabled_p[i])
+ if (int_n_enabled_p[i])
{
integer_types[itk_intN_0 + i * 2] = int_n_trees[i].signed_type;
integer_types[itk_unsigned_intN_0 + i * 2] =
int_n_trees[i].unsigned_type;
>From gcc-bugs-return-610856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jul 24 22:49:40 2018
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From: "kholdstare0.0 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug demangler/86664] New: Demangler segfaults
Date: Tue, 24 Jul 2018 22:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86664
Bug ID: 86664
Summary: Demangler segfaults
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: demangler
Assignee: unassigned at gcc dot gnu.org
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Created attachment 44432
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44432&action=edit
mangled_symbol
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Subject: [Bug demangler/86664] Demangler segfaults
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--- Comment #1 from Alexander Kondratskiy <kholdstare0.0 at gmail dot com> ---
Calling c++filt on the symbol (see attachment) results in a segfault.
This may be a similar issue to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82890
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Subject: [Bug c++/86665] New: declaration conflicts with target of using declaration already in scope
Date: Wed, 25 Jul 2018 01:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86665
Bug ID: 86665
Summary: declaration conflicts with target of using declaration
already in scope
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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The code is as follow:
namespace Name {
template <class T> class Point;
}
using Name::Point;
template <class T> class Point {
public:
Point() {}
protected:
T member;
};
int main(void) {
Name::Point<double> d;
return(0);
}
g++ accepts it, but clang++ rejects it:
code2.cpp:7:20: error: declaration conflicts with target of using declaration
already in scope
template <class T> class Point {
^
code2.cpp:2:27: note: target of using declaration
template <class T> class Point;
^
code2.cpp:5:13: note: using declaration
using Name::Point;
^
code2.cpp:15:22: error: implicit instantiation of undefined template
'Name::Point<double>'
Name::Point<double> d;
^
code2.cpp:2:27: note: template is declared here
template <class T> class Point;
^
2 errors generated.
My g++ is gcc version 9.0.0 20180715 (experimental) (GCC), and my clang++ is
clang version 7.0.0 (trunk 337118)
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Subject: [Bug fortran/86666] New: Can no longer traverse and read process environment table
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86666
Bug ID: 86666
Summary: Can no longer traverse and read process environment
table
Product: gcc
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Subject: [Bug fortran/86667] New: can no longer traverse environment table
Date: Wed, 25 Jul 2018 01:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86667
Bug ID: 86667
Summary: can no longer traverse environment table
Product: gcc
Version: 7.3.0
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Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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Created attachment 44433
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44433&action=edit
fortran module and example program that used to print environment table
Program could read process environment table and print it up through at least
GNU/gfortran 6.4. Now at 7.0.3 it loops showing first entry fron environment
table several hundred times and then fails with a segfault.
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Subject: [Bug fortran/86667] can no longer traverse environment table
Date: Wed, 25 Jul 2018 02:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86667
--- Comment #1 from urbanjost at comcast dot net ---
Created attachment 44434
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44434&action=edit
C code for interfacing to Fortran for printing environment table
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Subject: [Bug tree-optimization/86532] [9 Regression] Wrong code due to a wrong strlen folding starting with r262522
Date: Wed, 25 Jul 2018 02:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86532
--- Comment #29 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Wed Jul 25 02:11:31 2018
New Revision: 262958
URL: https://gcc.gnu.org/viewcvs?rev=262958&root=gcc&view=rev
Log:
PR tree-optimization/86622 - incorrect strlen of array of array plus variable
offset
PR tree-optimization/86532 - Wrong code due to a wrong strlen folding starting
with r262522
gcc/ChangeLog:
PR tree-optimization/86622
PR tree-optimization/86532
* builtins.h (string_length): Declare.
* builtins.c (c_strlen): Correct handling of non-constant offsets.
(check_access): Be prepared for non-constant length ranges.
(string_length): Make extern.
* expr.c (string_constant): Only handle the minor non-constant
array index. Use string_constant to compute the length of
a generic string constant.
gcc/testsuite/ChangeLog:
PR tree-optimization/86622
PR tree-optimization/86532
* gcc.c-torture/execute/strlen-2.c: New test.
* gcc.c-torture/execute/strlen-3.c: New test.
* gcc.c-torture/execute/strlen-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/strlen-2.c
trunk/gcc/testsuite/gcc.c-torture/execute/strlen-3.c
trunk/gcc/testsuite/gcc.c-torture/execute/strlen-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/builtins.h
trunk/gcc/expr.c
trunk/gcc/testsuite/ChangeLog
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From: "mattreecebentley at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86471] GCC/libstdc++ outputs inferior code for std::fill and std::fill_n vs std::memset on c-style arrays
Date: Wed, 25 Jul 2018 02:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86471
--- Comment #26 from Matt Bentley <mattreecebentley at gmail dot com> ---
(In reply to Jonathan Wakely from comment #25)
> What warning? Why can't you just pass 0 to __builtin_memset? It's a null
> pointer constant. I don't see any warning from clang when using -Weverything.
As corrected above, clang only issues the warning when comparing NULL to 0
without static_cast or reinterpret_cast.
> reinterpet_cast is forbidden in constexpr functions because it's purpose is
> to break the type system and say "trust me, I know what I'm doing", and such
> tricks are not allowed in constant expressions.
Yeah, but... why
> Using reinterpert_cast to convert 0 (a null pointer constant) into a pointer
> type is just silly and poor style. That conversion can be done implicitly,
> it doesn't need a sledgehammer to be used.
That's a bit of silly hyperbole I can do without.
> > But __builtin_constant_p allows it, so it's use is a matter of programmer
> > choice, at least in this context.
>
> It really isn't if the standard requires the algorithm to be 'constexpr'
> (which we don't implement yet, but there's no point adding constructs which
> will just make life harder in the future).
Fair enough-
M@
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86622] [9 Regression] incorrect strlen of array of array plus variable offset
Date: Wed, 25 Jul 2018 02:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86622
--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Wed Jul 25 02:11:31 2018
New Revision: 262958
URL: https://gcc.gnu.org/viewcvs?rev=262958&root=gcc&view=rev
Log:
PR tree-optimization/86622 - incorrect strlen of array of array plus variable
offset
PR tree-optimization/86532 - Wrong code due to a wrong strlen folding starting
with r262522
gcc/ChangeLog:
PR tree-optimization/86622
PR tree-optimization/86532
* builtins.h (string_length): Declare.
* builtins.c (c_strlen): Correct handling of non-constant offsets.
(check_access): Be prepared for non-constant length ranges.
(string_length): Make extern.
* expr.c (string_constant): Only handle the minor non-constant
array index. Use string_constant to compute the length of
a generic string constant.
gcc/testsuite/ChangeLog:
PR tree-optimization/86622
PR tree-optimization/86532
* gcc.c-torture/execute/strlen-2.c: New test.
* gcc.c-torture/execute/strlen-3.c: New test.
* gcc.c-torture/execute/strlen-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/strlen-2.c
trunk/gcc/testsuite/gcc.c-torture/execute/strlen-3.c
trunk/gcc/testsuite/gcc.c-torture/execute/strlen-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/builtins.h
trunk/gcc/expr.c
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86622] [9 Regression] incorrect strlen of array of array plus variable offset
Date: Wed, 25 Jul 2018 02:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86622
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r262958.
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Subject: [Bug tree-optimization/83819] [meta-bug] missing strlen optimizations
Date: Wed, 25 Jul 2018 02:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83819
Bug 83819 depends on bug 86622, which changed state.
Bug 86622 Summary: [9 Regression] incorrect strlen of array of array plus variable offset
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86622
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/86666] Can no longer traverse and read process environment table
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
.
*** This bug has been marked as a duplicate of bug 86667 ***
>From gcc-bugs-return-610869-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 02:13:40 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/86532] [9 Regression] Wrong code due to a wrong strlen folding starting with r262522
Date: Wed, 25 Jul 2018 02:13:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #30 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r262958.
>From gcc-bugs-return-610868-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 02:13:26 2018
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Subject: [Bug fortran/86667] can no longer traverse environment table
Date: Wed, 25 Jul 2018 02:23:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 86666 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-610870-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 02:23:03 2018
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Subject: [Bug middle-end/86631] [9 Regression] missing -Walloc-size-larger-than on ILP32 hosts
Date: Wed, 25 Jul 2018 02:29:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2018-07/msg01455.html
>From gcc-bugs-return-610871-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 02:29:40 2018
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/26613] Corner case causes garbage to be output by -aux-info switch.
Date: Wed, 25 Jul 2018 02:51:00 -0000
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--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #7)
> (In reply to Mark F. Haigh from comment #5)
> > Created attachment 11005 [details]
> > Fix for trunk (against 2006-03-03 CVS)
>
> Could you submit a newer version of this patch to the gcc-patches mailing
> list please?
I doubt c-aux-info.c has changed in the last 10 years ...
>From gcc-bugs-return-610872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 02:51:28 2018
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/37200] duplicate warning message with braced initializer list
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #3)
> (In reply to Eric Gallager from comment #2)
> > Confirmed that gcc still prints 2 warnings for the testcase. It's necessary
> > to set the standard manually to c89 or gnu89 now that GCC defaults to
> > -std=gnu11. Now that GCC has carets for its diagnostics, we can see that the
> > 2 warnings actually point to different places:
> >
> > $ /usr/local/bin/gcc -c -std=gnu89 -pedantic 37200.c
> > 37200.c: In function ‘foo’:
> > 37200.c:10:11: warning: initializer element is not computable at load time
> > [-Wpedantic]
> > { (void**) &x->tst }
> > ^
> > 37200.c:10:3: warning: initializer element is not computable at load time
> > [-Wpedantic]
> > { (void**) &x->tst }
> > ^
> >
> > So are they still actually duplicates?
>
> WAITING on a response to this.
No response; I'm going to close this on the reasoning that the carets show that
they're not actually duplicates.
>From gcc-bugs-return-610873-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 03:07:05 2018
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From: "amrosalem820 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86668] New: mixing ansi prototype with K&R definition
Date: Wed, 25 Jul 2018 07:26:00 -0000
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Bug ID: 86668
Summary: mixing ansi prototype with K&R definition
Product: gcc
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I mix ansi prototype with K&R definition ,, I know it will be an error if the
parameters of the ansi form aren't compatible with the default promotions ..
my problem is when I wrote the ansi prototype outside main it compiled well !!
//this program compiled well
int fun (float x) ;
int main ()
{
fun (5.0);
}
int fun (x)
float x ;
{
return x ;
}
but when I wrote it inside main it gave an error as expected
//this program didn't compile and gave error "conflicting types for fun"
int main ()
{
int fun (float x) ;
fun (5.0 );
}
int fun (x)
float x ;
{
return x ;
}
why there is difference between writing prototype inside main or outside main
in this case ?
>From gcc-bugs-return-610874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 07:26:33 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/39117] missed strict-aliasing warning
Date: Wed, 25 Jul 2018 07:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
strict-aliasing warnings are IMHO completely misguided.
Note that for the testcase accessing char[] storage is valid with all
types so it is correct to not warn about either case.
So I'd say "fixed" to this one... but fixed in another way than requested.
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Subject: [Bug middle-end/39322] Missed aliasing warning
Date: Wed, 25 Jul 2018 07:55:00 -0000
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Bug 39322 depends on bug 39117, which changed state.
Bug 39117 Summary: missed strict-aliasing warning
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39117
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
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Subject: [Bug c++/86669] New: [5/6/7/8/9 regression] Complete object constructor clone omits length for a c++11 braced initialiser
Date: Wed, 25 Jul 2018 07:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86669
Bug ID: 86669
Summary: [5/6/7/8/9 regression] Complete object constructor
clone omits length for a c++11 braced initialiser
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: iains at gcc dot gnu.org
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Created attachment 44435
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44435&action=edit
pre-processed and reduced code
This applies to targets that do not allow (or have) alias support for
constructor clones.
c-reduce has obfuscated the variable names in the reduced code, of course ...
The original code looks like this:
====
AArch64LegalizerInfo::AArch64LegalizerInfo(const AArch64Subtarget &ST)
: LegalizerInfo() {
const LLT p0 = LLT::pointer(0, 64);
const LLT s1 = LLT::scalar(1);
const LLT s8 = LLT::scalar(8);
const LLT s16 = LLT::scalar(16);
const LLT s32 = LLT::scalar(32);
const LLT s64 = LLT::scalar(64);
const LLT s128 = LLT::scalar(128);
const LLT v2s32 = LLT::vector(2, 32);
const LLT v4s32 = LLT::vector(4, 32);
const LLT v2s64 = LLT::vector(2, 64);
for (auto Ty : {p0, s1, s8, s16, s32, s64})
setAction({/*G_IMPLICIT_DEF*/41, Ty}, Legal);
...
}
=====
The gimple for the base constructor contains:
"
try
{
D.2730 = {};
D.2730.i = 6; <<<<< OK _M_len is set
D.2729[0] = e;
D.2729[1] = f;
D.2729[2] = g;
D.2729[3] = h;
D.2729[4] = i;
D.2729[5] = j;
D.2730.a = &D.2729;
__for_range = &D.2730;
__for_begin = std::initializer_list<llvm::J>::begin
(__for_range);
__for_end = std::initializer_list<llvm::J>::end
(__for_range);
"
but for the complete constructor:
"
try
{
D.2745 = {}; <<< _M_len init missing
D.2744[0] = e;
D.2744[1] = f;
D.2744[2] = g;
D.2744[3] = h;
D.2744[4] = i;
D.2744[5] = j;
D.2745.a = &D.2744;
__for_range = &D.2745;
__for_begin = std::initializer_list<llvm::J>::begin
(__for_range);
__for_end = std::initializer_list<llvm::J>::end
(__for_range);
<D.2808>:
"
========
With clang
.../bin/clang -cc1 -triple x86_64-apple-macosx10.12.0 -x c++-cpp-output
AArch64LegalizerInfo-fmt.ii -O0 -S -std=c++11 -fvisibility-inlines-hidden
-fno-rtti -o tc.s
The complete constructor is rendered as a thunk calling the base constructor
(not sure why we conclude this is not viable in GCC)
======
With GCC (all versions I've tried 5...trunk) we get the effect above.
.../libexec/gcc/x86_64-apple-darwin14/7.3.0/cc1plus -fpreprocessed
AArch64LegalizerInfo-fmt.ii -fPIC -quiet -mmacosx-version-min=10.10
-mtune=core2 -g3 -O0 -Werror=date-time -Wall -Wextra -Wno-unused-parameter
-Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -Wpedantic
-Wno-long-long -Wno-maybe-uninitialized -Wdelete-non-virtual-dtor -Wno-comment
-std=c++11 -fPIC -fvisibility-inlines-hidden -fno-exceptions -fno-rtti -o tg.s
======
I took a look at what was happening in cp/optimize.c:maybe_clone_body() but
couldn't see any special difference between the operations carried out to clone
the base and the complete constructors.
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Wed, 25 Jul 2018 08:00:00 -0000
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #11)
> OK, so patch at least regresses
>
> FAIL: g++.dg/debug/dwarf2/lambda1.C -std=gnu++11 scan-assembler-times
> DW_TAG_variable[^.]*.ascii "this.0" 2
> FAIL: g++.dg/debug/dwarf2/lambda1.C -std=gnu++14 scan-assembler-times
> DW_TAG_variable[^.]*.ascii "this.0" 2
>
> but otherwise passes LTO bootstrap. Have to investigate the above tomorrow.
The reason is that in the late phase we fail DIE re-use and instead generate
a specification DIE because
if (((is_unit_die (old_die->die_parent)
/* This condition fixes the inconsistency/ICE with the
following Fortran test (or some derivative thereof) while
building libgfortran:
module some_m
contains
logical function funky (FLAG)
funky = .true.
end function
end module
*/
|| (old_die->die_parent
&& old_die->die_parent->die_tag == DW_TAG_module)
|| context_die == NULL)
...
subr_die = old_die;
triggers only because of context_die == NULL. This is a funky area
but the comment "For local class methods, this doesn't apply; we just use the
old DIE." suggests
|| local_scope_p (old_die->die_parent)
pre early-debug merge already had the context_die == NULL check which
_possibly_ was supposed to match that comment.
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Subject: [Bug sanitizer/79635] Explain to translators what "asan" means
Date: Wed, 25 Jul 2018 08:04:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Jul 25 08:02:53 2018
New Revision: 262959
URL: https://gcc.gnu.org/viewcvs?rev=262959&root=gcc&view=rev
Log:
Explain asan parameters in params.def (PR sanitizer/79635).
2018-07-25 Martin Liska <mliska@suse.cz>
PR sanitizer/79635
* params.def: Explain ASan abbreviation and provide
a documentation link.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/params.def
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Subject: [Bug c/86668] mixing ansi prototype with K&R definition
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Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
Please use gcc-help@gcc.gnu.org for user questions.
With the prototype in scope the non-prototyped definition of fun is adjusted.
This doesn't happen if the prototype is no longer in scope. If you want
defined behaviour you need to use the correct prototype with the argument
declared as double.
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Subject: [Bug objc/80798] Dynamic stack buffer (alloca) overflow in ObjC compiler.
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Thanks Max.
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Subject: [Bug middle-end/86645] [9 Regression] UBSAN error: tree-cfg.c:7874:26: runtime error: load of value 4293224825, which is not a valid value for type 'dump_flag'
Date: Wed, 25 Jul 2018 08:06:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Jul 25 08:04:15 2018
New Revision: 262960
URL: https://gcc.gnu.org/viewcvs?rev=262960&root=gcc&view=rev
Log:
Limit dump_flag enum values range (PR middle-end/86645).
2018-07-25 Martin Liska <mliska@suse.cz>
PR middle-end/86645
* dumpfile.c: And excluded values with TDF_ALL_VALUES.
* dumpfile.h (enum dump_flag): Defince TDF_ALL_VALUES.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dumpfile.c
trunk/gcc/dumpfile.h
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Subject: [Bug other/63426] [meta-bug] Issues found with -fsanitize=undefined
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Bug 63426 depends on bug 86645, which changed state.
Bug 86645 Summary: [9 Regression] UBSAN error: tree-cfg.c:7874:26: runtime error: load of value 4293224825, which is not a valid value for type 'dump_flag'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86645
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----------------------------------------------------------------------------
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Subject: [Bug sanitizer/79635] Explain to translators what "asan" means
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-610885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:14:13 2018
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Subject: [Bug gcov-profile/84758] Wrong coverage for quite simple CFG
Date: Wed, 25 Jul 2018 08:14:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got patch candidate for that.
>From gcc-bugs-return-610884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:07:04 2018
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Subject: [Bug middle-end/86645] [9 Regression] UBSAN error: tree-cfg.c:7874:26: runtime error: load of value 4293224825, which is not a valid value for type 'dump_flag'
Date: Wed, 25 Jul 2018 08:14:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-610886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:14:14 2018
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Subject: [Bug gcov-profile/83813] [GCOV] unsigned char in a union lead to incorrect coverage in gcov
Date: Wed, 25 Jul 2018 08:16:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got patch candidate for that.
>From gcc-bugs-return-610887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:16:12 2018
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Subject: [Bug c++/86665] declaration conflicts with target of using declaration already in scope
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Well done, yet another duplicate of your own bug.
*** This bug has been marked as a duplicate of bug 84589 ***
>From gcc-bugs-return-610888-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:16:14 2018
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Subject: [Bug c++/84589] Failure to diagnose conflicting declaration of struct
Date: Wed, 25 Jul 2018 08:18:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 86665 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-610889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:18:53 2018
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Subject: [Bug other/60330] Licensed an unlicensed file
Date: Wed, 25 Jul 2018 08:26:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this can just be closed as INVALID.
>From gcc-bugs-return-610890-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:26:28 2018
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Subject: [Bug other/60330] Licensed an unlicensed file
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Agreed with Richi on IRC, let's close this.
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Subject: =?UTF-8?B?W0J1ZyBjKysvODY2NjFdIFs5IFJlZ3Jlc3Npb25dIGcrKyBJQ0U6dHJlZSBj?= =?UTF-8?B?aGVjazogZXhwZWN0ZWQgdHJlZSB0aGF0IGNvbnRhaW5zIOKAmGRlY2wgbWlu?= =?UTF-8?B?aW1hbOKAmSBzdHJ1Y3R1cmUsIGhhdmUg4oCYb3ZlcmxvYWTigJkgaW4gbm90?= =?UTF-8?B?ZV9uYW1lX2RlY2xhcmVkX2luX2NsYXNzLCBhdCBjcC9jbGFzcy5jOjgyODg=?Date: Wed, 25 Jul 2018 08:28:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-7-25
CC| |marxin at gcc dot gnu.org,
| |paolo.carlini at oracle dot com
Known to work| |8.1.0
Target Milestone|--- |9.0
Summary|g++ ICE:tree check: |[9 Regression] g++ ICE:tree
|expected tree that contains |check: expected tree that
|‘decl minimal’ structure, |contains ‘decl minimal’
|have ‘overload’ in |structure, have ‘overload’
|note_name_declared_in_class |in
|, at cp/class.c:8288 |note_name_declared_in_class
| |, at cp/class.c:8288
Known to fail| |9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r262851.
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Subject: [Bug c++/86663] g++ ICE with -std=c++11: internal compiler error: Segmentation fault
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86663
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-07-25
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-610893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:33:29 2018
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/86667] [7/8/9 Regression] can no longer traverse environment table
Date: Wed, 25 Jul 2018 08:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86667
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |6.4.0
Keywords| |wrong-code
Last reconfirmed| |2018-07-25
Ever confirmed|0 |1
Summary|can no longer traverse |[7/8/9 Regression] can no
|environment table |longer traverse environment
| |table
Target Milestone|--- |7.4
Known to fail| |7.3.0, 8.1.0, 9.0
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed. The change occurred between revisions r237590 (2016-06-20, OK) and
r238821 (2016-07-28, wrong code.
>From gcc-bugs-return-610894-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:35:48 2018
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Subject: [Bug c++/86669] [6/7/8/9 regression] Complete object constructor clone omits length for a c++11 braced initialiser
Date: Wed, 25 Jul 2018 08:38:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target Milestone|--- |6.5
Summary|[5/6/7/8/9 regression] |[6/7/8/9 regression]
|Complete object constructor |Complete object constructor
|clone omits length for a |clone omits length for a
|c++11 braced initialiser |c++11 braced initialiser
>From gcc-bugs-return-610896-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:44:06 2018
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Subject: [Bug c/86618] tree-vect-stmts.c:3340: ubsan error
Date: Wed, 25 Jul 2018 08:44:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Fixed by r262951.
>From gcc-bugs-return-610898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:44:10 2018
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Subject: [Bug gcov-profile/85367] [GCOV] A call to the _subborrow_u64 builtin-function is wrongly marked as executed twice
Date: Wed, 25 Jul 2018 08:44:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Using gcc 8.1.1 I see proper values:
-: 0:Source:pr85367.c
-: 0:Graph:pr85367.gcno
-: 0:Data:pr85367.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:#include <x86intrin.h>
-: 2:
1: 3:int main ()
-: 4:{
-: 5: unsigned char c;
-: 6: unsigned long long x, y;
-: 7:
1: 8: c = 0;
1: 9: x = 1LL;
1: 10: y = 0LL;
-: 11:
-: 12: /* X = 0x0000000000000001, Y = 0x0000000000000000, C = 0. */
1: 13: c = _subborrow_u64 (c, y, x, &x); // executed 2x
-: 14:
1: 15: return 0;
-: 16:}
>From gcc-bugs-return-610895-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:38:40 2018
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Subject: [Bug target/82005] Early lto debug not implemented on Darwin
Date: Wed, 25 Jul 2018 08:44:00 -0000
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--- Comment #43 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #42)
> (In reply to Iain Sandoe from comment #40)
> > Created attachment 44417 [details]
> > Patch series to enable copying of early debug data.
< snip>
(not ignoring the other options - but let's look at the possibilities to do it
a better way)
> > - we seem to be jumping through quite a few hoops here, presumably because
> > it's too complex to emit the relevant data as markup into the LTO stream
> > directly?
>
> The issue is that we'd have to distribute _all_ early debug to _each_
> LTRANS unit with late debug. That's N-fold duplication that I wanted
> to avoid... but yes, with the assembly scheme from above you could
> "prepend" each LTRANS unit with the "merged" early debug assembly.
> (at least N is limited by --param lto-partitions which defaults to 32...)
hmm...
>
> Note that doing the assembling of the early debug during compile-time
> and then have the linker at the final link pick up that debug from the
> original objects as would have been my prefered way would be still the
> best for compile-time and disk-space usage. But of course it wouldn't
> work for DARWIN w/o assembler changes to support this kind of relocations.
Darwin's assembler supports < undef symbol >+offset as a relocation.
with
"actual_target" the address we want
"< undef symbol >" the LTO "_sinus.c.f4d7e603" type symbol we emit
I'm not too well up on DWARF specifics, probably time to RTFM... is the
intention of <undef symbol>+offset-Lcurrent_section_start a PC-rel form? (i.e.
does the "offset" roll any more in than the actual_target-< undef symbol >)?
Normally, as I noted above, Darwin does things like
set $foo Ltarget_sym-Lcurrent_section_start
.long $foo
to render the inter-section-offset as an absolute value (i.e. eliding the
reloc.) which dsymutil can understand because it knows the section starts
already.
====
So .. if we can
* copy the LTO early debug (renaming as now)
* omit ld -r operation on these (which will just produce 0 output)
* make the external refs into < undef symbol >+offset (where offset is
actual_target-symbol)
* defer the linking of the early debug copied objects until the final link.
Then, since there will be references to the debug symbols in objects with
non-zero text/data, presumably the linker has to honour those. (I don't know
if it will, but it seems it should).
this seems like something worth trying, before heading into the more
complicated stuff.
maybe I can fake the steps by hand and try it ..
WDYT?
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Subject: [Bug other/63426] [meta-bug] Issues found with -fsanitize=undefined
Date: Wed, 25 Jul 2018 08:46:00 -0000
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Bug 63426 depends on bug 86618, which changed state.
Bug 86618 Summary: tree-vect-stmts.c:3340: ubsan error
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86618
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug gcov-profile/85178] [GCOV] for(;;) statement is wrongly marked as not executed when there is a int array in its body in Gcov
Date: Wed, 25 Jul 2018 08:46:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Again, it's partially folded and due to that a misleading are reported.
>From gcc-bugs-return-610899-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:46:10 2018
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Subject: [Bug tree-optimization/86644] [9 Regression] UBSAN error: tree-vect-patterns.c:225:17: runtime error: shift exponent 64 is too large for 32-bit type 'int'
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86644
rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Fixed by r262961.
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Subject: [Bug other/63426] [meta-bug] Issues found with -fsanitize=undefined
Date: Wed, 25 Jul 2018 08:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
Bug 63426 depends on bug 86644, which changed state.
Bug 86644 Summary: [9 Regression] UBSAN error: tree-vect-patterns.c:225:17: runtime error: shift exponent 64 is too large for 32-bit type 'int'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86644
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-610902-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:52:23 2018
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86667] [7/8/9 Regression] can no longer traverse environment table
Date: Wed, 25 Jul 2018 08:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86667
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|fortran |c
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
If I compile the C file with r237590 and link the object file to the fortran
file compiled with any revision (I have tried), the test works. This looks as a
C bug rather than a fortran one.
Note that compiling the C file with -Wall gives
pr86667.c: In function 'my_initenv':
pr86667.c:39:7: warning: value computed is not used [-Wunused-value]
*ep++;
^~~~~
pr86667.c: In function 'my_readenv':
pr86667.c:54:14: warning: operation on 'ep' may be undefined [-Wsequence-point]
*ep=*ep++;
~~^~
Also I get the warning (on darwin)
ld: warning: tentative definition of '_longest_env_variable' with size 8 from
'/var/folders/8q/sh_swgz96r7f5vnn08f7fxr00000gn/T//ccDHXTrU.o' is being
replaced by real definition of smaller size 4 from 'pr86667.o'
>From gcc-bugs-return-610903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 08:58:59 2018
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Subject: [Bug rtl-optimization/80818] LRA clobbers live hard reg clobbered during rematerialization
Date: Wed, 25 Jul 2018 09:06:00 -0000
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Andreas Krebbel <krebbel at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2018-07-25
Version|8.0 |7.3.1
Resolution|FIXED |---
Ever confirmed|0 |1
--- Comment #14 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
I ran into the same problem with current GCC 7 branch. Could you apply your fix
also to GCC 7 branch?
>From gcc-bugs-return-610904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 09:06:15 2018
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Wed, 25 Jul 2018 09:10:00 -0000
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--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
Just for record, building Firefox w/ GCC 8.1 w/o LTO produces:
VM SIZE FILE SIZE
-------------- --------------
0.0% 0 .debug_info 978Mi 48.5%
0.0% 0 .debug_loc 460Mi 22.8%
0.0% 0 .debug_str 158Mi 7.9%
0.0% 0 .debug_ranges 132Mi 6.6%
0.0% 0 .debug_line 111Mi 5.5%
67.7% 74.9Mi .text 74.9Mi 3.7%
0.0% 0 .strtab 37.8Mi 1.9%
0.0% 0 .symtab 14.1Mi 0.7%
0.0% 0 .debug_abbrev 11.4Mi 0.6%
7.9% 8.75Mi .eh_frame 8.75Mi 0.4%
7.7% 8.47Mi .rela.dyn 8.47Mi 0.4%
7.7% 8.47Mi .rodata 8.47Mi 0.4%
3.8% 4.20Mi .data.rel.ro 4.20Mi 0.2%
1.9% 2.05Mi .eh_frame_hdr 2.05Mi 0.1%
1.5% 1.65Mi .dynstr 1.65Mi 0.1%
0.9% 1.04Mi [Other] 1.33Mi 0.1%
0.0% 0 .debug_aranges 1.29Mi 0.1%
0.6% 650Ki .bss 0 0.0%
0.4% 413Ki .dynsym 413Ki 0.0%
0.0% 0 .debug_pubtypes 349Ki 0.0%
0.0% 15 [None] 0 0.0%
100.0% 110Mi TOTAL 1.97Gi 100.0%
>From gcc-bugs-return-610905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 09:10:09 2018
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Subject: [Bug libstdc++/86655] std::assoc_legendre should not constrain the value of m
Date: Wed, 25 Jul 2018 09:14:00 -0000
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--- Comment #2 from Matthias Kretz <kretz at kde dot org> ---
http://eel.is/c++draft/c.math#sf.cmath-1.3 might be the reason why `m <= l` is
enforced. But unless I'm confused the footnote on "mathematically defined"
tells us it should work:
- "(a) if it is explicitly defined for that set of argument values" - does not
hold
- "(b) if its limiting value exists and does not depend on the direction of
approach" - this holds, no?
>From gcc-bugs-return-610906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 09:14:09 2018
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Subject: [Bug fortran/80645] FAIL: gfortran.dg/elemental_subroutine_3.f90 -O1 (test for excess errors)
Date: Wed, 25 Jul 2018 09:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80645
Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|m68k-*-*, ia64-*-*, |m68k-*-*, ia64-*-*,
|sparc*-*-*, powerpc*-*-*, |sparc*-*-*, powerpc*-*-*,
|hppa*-*-*, alpha*-*-*, |hppa*-*-*, alpha*-*-*,
|arm-*-* |arm-*-*, riscv*-*-*
Status|WAITING |NEW
--- Comment #14 from Andreas Schwab <schwab@linux-m68k.org> ---
Also fails on riscv.
>From gcc-bugs-return-610907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 09:32:22 2018
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Subject: [Bug gcov-profile/85338] [GCOV] Type conversion leads to incorrect coverage in printf
Date: Wed, 25 Jul 2018 09:32:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got patch candidate for that.
>From gcc-bugs-return-610908-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 09:32:53 2018
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/86670] New: unsized static array var is removed but still accessed.
Date: Wed, 25 Jul 2018 09:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86670
Bug ID: 86670
Summary: unsized static array var is removed but still
accessed.
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: iains at gcc dot gnu.org
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Created attachment 44436
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44436&action=edit
example code showing the issue
gcc-trunk-build$ ./gcc/xgcc -Bgcc ../static-var-removed-and-accessed.c -c
-save-temps -Wall -O0
<no diagnostic for O0..3 or Wextra>
Here we have
static int a[];
which is later assigned to.
===
we don't emit any storage for a, and it is silently changed to an undefined
external.
gcc-trunk-build$ nm static-var-removed-and-accessed.o
U a
00000000 T foo
gcc-trunk-build$ objdump -dr static-var-removed-and-accessed.o
<snip>
29: 8b 55 fc mov -0x4(%ebp),%edx
2c: 89 14 85 00 00 00 00 mov %edx,0x0(,%eax,4)
2f: R_386_32 a
33: 83 45 f8 01 addl $0x1,-0x8(%ebp)
37: 81 7d f8 ff 00 00 00 cmpl $0xff,-0x8(%ebp)
====
The code is wrong, of course, but we are neither diagnosing, nor producing
sensible output.
I noticed this because it fails at assembly time on m32 Darwin (where the
compiler has concluded that 'a' is TU-local, but not present).
>From gcc-bugs-return-610909-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 09:34:19 2018
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Subject: [Bug testsuite/86671] New: Many testsuite failures due to -latomic not found
Date: Wed, 25 Jul 2018 09:35:00 -0000
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Bug ID: 86671
Summary: Many testsuite failures due to -latomic not found
Product: gcc
Version: 9.0
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Target: riscv*-*-*
A lot of tests fail due to missing set up to find the uninstalled -latomic
during linking. This affects gcc, g++, libstdc++ and a large part of the
libgomp tests.
>From gcc-bugs-return-610910-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 09:35:33 2018
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Subject: [Bug gcov-profile/85350] [GCOV] wrong coverage when using constant variable in struct declaration
Date: Wed, 25 Jul 2018 09:37:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got patch candidate for that.
>From gcc-bugs-return-610911-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 09:37:03 2018
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Subject: [Bug gcov-profile/85372] [GCOV] Wrong coverage with setjmp and longjmp function
Date: Wed, 25 Jul 2018 09:47:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got patch for that.
>From gcc-bugs-return-610912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 09:47:01 2018
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Subject: [Bug target/82005] Early lto debug not implemented on Darwin
Date: Wed, 25 Jul 2018 09:48:00 -0000
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--- Comment #44 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 25 Jul 2018, iains at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82005
>
> --- Comment #43 from Iain Sandoe <iains at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #42)
> > (In reply to Iain Sandoe from comment #40)
> > > Created attachment 44417 [details]
> > > Patch series to enable copying of early debug data.
>
> < snip>
> (not ignoring the other options - but let's look at the possibilities to do it
> a better way)
>
> > > - we seem to be jumping through quite a few hoops here, presumably because
> > > it's too complex to emit the relevant data as markup into the LTO stream
> > > directly?
> >
> > The issue is that we'd have to distribute _all_ early debug to _each_
> > LTRANS unit with late debug. That's N-fold duplication that I wanted
> > to avoid... but yes, with the assembly scheme from above you could
> > "prepend" each LTRANS unit with the "merged" early debug assembly.
> > (at least N is limited by --param lto-partitions which defaults to 32...)
>
> hmm...
> >
> > Note that doing the assembling of the early debug during compile-time
> > and then have the linker at the final link pick up that debug from the
> > original objects as would have been my prefered way would be still the
> > best for compile-time and disk-space usage. But of course it wouldn't
> > work for DARWIN w/o assembler changes to support this kind of relocations.
>
> Darwin's assembler supports < undef symbol >+offset as a relocation.
That's actually what we want...
> with
> "actual_target" the address we want
> "< undef symbol >" the LTO "_sinus.c.f4d7e603" type symbol we emit
>
> I'm not too well up on DWARF specifics, probably time to RTFM... is the
> intention of <undef symbol>+offset-Lcurrent_section_start a PC-rel form? (i.e.
> does the "offset" roll any more in than the actual_target-< undef symbol >)?
The -Lcurrent_section_start is zero because .debug_info gets relocated to
zero.
That is, we want the offset in the final .debug_info section where
<undef symbol> points somewhere into it and offset is relative to
that symbol.
One of my "hacks" was to simply elide the minus in
darwin_asm_output_dwarf_offset, if the section is a DWARF one.
ISTR that worked "fine" (it fixed the assembler messages) but I
didn't check the result further.
> Normally, as I noted above, Darwin does things like
> set $foo Ltarget_sym-Lcurrent_section_start
> .long $foo
> to render the inter-section-offset as an absolute value (i.e. eliding the
> reloc.) which dsymutil can understand because it knows the section starts
> already.
So
set $foo < undef symbol > - Lcurrent_section_start
makes $foo + offset work as a relocation?
> ====
>
> So .. if we can
> * copy the LTO early debug (renaming as now)
> * omit ld -r operation on these (which will just produce 0 output)
> * make the external refs into < undef symbol >+offset (where offset is
> actual_target-symbol)
> * defer the linking of the early debug copied objects until the final link.
>
> Then, since there will be references to the debug symbols in objects with
> non-zero text/data, presumably the linker has to honour those. (I don't know
> if it will, but it seems it should).
>
> this seems like something worth trying, before heading into the more
> complicated stuff.
>
> maybe I can fake the steps by hand and try it ..
>
> WDYT?
If the relocation issue can be solved then yes, we should be able to
handle this. The ld -r step was just to avoid explosion in the number
of input files for the final link - it currently doesn't save us
very much on ELF either because .debug_str isn't string-merged by
ld -r. So I think we can simply remove this step alltogether.
>From gcc-bugs-return-610913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 09:48:48 2018
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Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Wed, 25 Jul 2018 10:02:00 -0000
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--- Comment #14 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 25 Jul 2018, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86654
>
> --- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
> Just for record, building Firefox w/ GCC 8.1 w/o LTO produces:
>
> VM SIZE FILE SIZE
> -------------- --------------
> 0.0% 0 .debug_info 978Mi 48.5%
> 0.0% 0 .debug_loc 460Mi 22.8%
> 0.0% 0 .debug_str 158Mi 7.9%
> 0.0% 0 .debug_ranges 132Mi 6.6%
> 0.0% 0 .debug_line 111Mi 5.5%
> 67.7% 74.9Mi .text 74.9Mi 3.7%
> 0.0% 0 .strtab 37.8Mi 1.9%
> 0.0% 0 .symtab 14.1Mi 0.7%
> 0.0% 0 .debug_abbrev 11.4Mi 0.6%
> 7.9% 8.75Mi .eh_frame 8.75Mi 0.4%
> 7.7% 8.47Mi .rela.dyn 8.47Mi 0.4%
> 7.7% 8.47Mi .rodata 8.47Mi 0.4%
> 3.8% 4.20Mi .data.rel.ro 4.20Mi 0.2%
> 1.9% 2.05Mi .eh_frame_hdr 2.05Mi 0.1%
> 1.5% 1.65Mi .dynstr 1.65Mi 0.1%
> 0.9% 1.04Mi [Other] 1.33Mi 0.1%
> 0.0% 0 .debug_aranges 1.29Mi 0.1%
> 0.6% 650Ki .bss 0 0.0%
> 0.4% 413Ki .dynsym 413Ki 0.0%
> 0.0% 0 .debug_pubtypes 349Ki 0.0%
> 0.0% 15 [None] 0 0.0%
> 100.0% 110Mi TOTAL 1.97Gi 100.0%
If you throw dwz on it? It should be able to compress the
early debug quite well (header file stuff)
>From gcc-bugs-return-610914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 10:02:18 2018
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Subject: [Bug target/82005] Early lto debug not implemented on Darwin
Date: Wed, 25 Jul 2018 10:33:00 -0000
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--- Comment #45 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #44)
> On Wed, 25 Jul 2018, iains at gcc dot gnu.org wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82005
> >
> > --- Comment #43 from Iain Sandoe <iains at gcc dot gnu.org> ---
> > (In reply to Richard Biener from comment #42)
> > > (In reply to Iain Sandoe from comment #40)
> > > > Created attachment 44417 [details]
> > > > Patch series to enable copying of early debug data.
> > > Note that doing the assembling of the early debug during compile-time
> > > and then have the linker at the final link pick up that debug from the
> > > original objects as would have been my prefered way would be still the
> > > best for compile-time and disk-space usage. But of course it wouldn't
> > > work for DARWIN w/o assembler changes to support this kind of relocations.
> >
> > Darwin's assembler supports < undef symbol >+offset as a relocation.
>
> That's actually what we want...
>
> > with
> > "actual_target" the address we want
> > "< undef symbol >" the LTO "_sinus.c.f4d7e603" type symbol we emit
> >
> > I'm not too well up on DWARF specifics, probably time to RTFM... is the
> > intention of <undef symbol>+offset-Lcurrent_section_start a PC-rel form? (i.e.
> > does the "offset" roll any more in than the actual_target-< undef symbol >)?
>
> The -Lcurrent_section_start is zero because .debug_info gets relocated to
> zero.
>
> That is, we want the offset in the final .debug_info section where
> <undef symbol> points somewhere into it and offset is relative to
> that symbol.
>
> One of my "hacks" was to simply elide the minus in
> darwin_asm_output_dwarf_offset, if the section is a DWARF one.
> ISTR that worked "fine" (it fixed the assembler messages) but I
> didn't check the result further.
OK .. so I should resurrect a version of that that applies only for the LTO
cases (since the "normal" cases are expecting the optimisation below).
>
> > Normally, as I noted above, Darwin does things like
> > set $foo Ltarget_sym-Lcurrent_section_start
> > .long $foo
> > to render the inter-section-offset as an absolute value (i.e. eliding the
> > reloc.) which dsymutil can understand because it knows the section starts
> > already.
>
> So
>
> set $foo < undef symbol > - Lcurrent_section_start
>
> makes $foo + offset work as a relocation?
When the consumer is dsymutil (or some other tool that expects this
optimisation, at least some versions of GDB can consume mach-o .o files)
It does what you'd expect - encodes the offset as an absolute value.
dsymutil (the debug linker) is walking the debug structures; so at each point
it knows what the offset relates to, thus avoiding the object storage and extra
time for the relocs.
ld64 does understand at least some of this (it has to handle at minimum FDEs) -
but I don't know without checking if it will ignore the debug relocs or not
(not been in that code recently).
>
> > ====
> >
> > So .. if we can
> > * copy the LTO early debug (renaming as now)
> > * omit ld -r operation on these (which will just produce 0 output)
> > * make the external refs into < undef symbol >+offset (where offset is
> > actual_target-symbol)
> > * defer the linking of the early debug copied objects until the final link.
> >
> > Then, since there will be references to the debug symbols in objects with
> > non-zero text/data, presumably the linker has to honour those. (I don't know
> > if it will, but it seems it should).
> >
> > this seems like something worth trying, before heading into the more
> > complicated stuff.
> >
> > maybe I can fake the steps by hand and try it ..
> >
> > WDYT?
>
> If the relocation issue can be solved then yes, we should be able to
> handle this. The ld -r step was just to avoid explosion in the number
> of input files for the final link - it currently doesn't save us
> very much on ELF either because .debug_str isn't string-merged by
> ld -r. So I think we can simply remove this step alltogether.
OK.. it's on my TODO to try and simulate this by hand (at least I now have the
simple-object part done)
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/60330] Licensed an unlicensed file
Date: Wed, 25 Jul 2018 10:40:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
https://www.gnu.org/prep/maintain/maintain.html#Copyright-Notices
"You should maintain a proper copyright notice and a license notice in each
nontrivial file in the package. (Any file more than ten lines long is
nontrivial for this purpose.)"
So there's no need on this file.
>From gcc-bugs-return-610916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 10:40:36 2018
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Subject: [Bug gcov-profile/85351] [GCOV] Wrong coverage with exit() executed in a if statement within a called function
Date: Wed, 25 Jul 2018 10:43:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P5
Assignee|marxin at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, it's really small issue.
>From gcc-bugs-return-610917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 10:43:52 2018
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Subject: [Bug testsuite/86660] libgomp.c++/for-15.C ICEs with nvptx offloading
Date: Wed, 25 Jul 2018 10:45:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44437
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44437&action=edit
gcc9-pr86660.patch
Untested patch. Does this fix it?
>From gcc-bugs-return-610918-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 10:45:45 2018
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Subject: [Bug testsuite/86660] libgomp.c++/for-15.C ICEs with nvptx offloading
Date: Wed, 25 Jul 2018 10:49:00 -0000
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--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> Created attachment 44437 [details]
> gcc9-pr86660.patch
>
> Untested patch. Does this fix it?
I'll try it out.
>From gcc-bugs-return-610919-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 10:49:07 2018
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Subject: [Bug c/86670] unsized static array var is removed but still accessed.
Date: Wed, 25 Jul 2018 10:49:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2018-07-25
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. The decl becomes
<var_decl 0x7ffff7fefe10 a
type <array_type 0x7ffff69bf738
type <integer_type 0x7ffff68a75e8 int public SI
size <integer_cst 0x7ffff688ff30 constant 32>
unit-size <integer_cst 0x7ffff688ff48 constant 4>
align:32 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7ffff68a75e8 precision:32 min <integer_cst 0x7ffff688fee8 -2147483648> max
<integer_cst 0x7ffff688ff00 2147483647>
pointer_to_this <pointer_type 0x7ffff68afa80>>
BLK
align:32 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7ffff69bf738>
used static external read preserve BLK defer-output t.c:1:12
align:32 warn_if_not_align:0
attributes <tree_list 0x7ffff69bc780
purpose <identifier_node 0x7ffff69cfe10 used>>>
so is STATIC EXTERNAL. That means somehow grokdeclarator goes wrong.
>From gcc-bugs-return-610920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 10:49:08 2018
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Subject: [Bug gcov-profile/85370] [GCOV] Wrong coverage with the target_clones attribute
Date: Wed, 25 Jul 2018 10:56:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got patch candidate for that prints following:
-: 0:Source:pr85370.c
-: 0:Graph:pr85370.gcno
-: 0:Data:pr85370.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:__attribute__((target_clones("arch=slm","default")))
1: 2:int foo1 (int a, int b) { // executed #### wrongly
1: 3: return a + b;
-: 4:}
------------------
foo1.arch_slm.0:
0: 2:int foo1 (int a, int b) { // executed #### wrongly
0: 3: return a + b;
-: 4:}
------------------
foo1.default.1:
1: 2:int foo1 (int a, int b) { // executed #### wrongly
1: 3: return a + b;
-: 4:}
------------------
-: 5:
1: 6:int foo2 (int a, int b) {
1: 7: return a + b;
-: 8:}
-: 9:
1: 10:int main() {
1: 11: foo1(1, 1);
1: 12: foo2(1, 1);
1: 13: return 1;
-: 14:}
>From gcc-bugs-return-610921-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 10:56:22 2018
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Subject: [Bug gcov-profile/85337] [GCOV] inconsistent coverage in switch-case statement
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P5
Status|ASSIGNED |NEW
Assignee|marxin at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
If I put there some statements in the empty cases, then it's fine. Thus low
priority.
>From gcc-bugs-return-610922-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:00:55 2018
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Subject: [Bug gcov-profile/85332] [GCOV] wrong coverage with do-while in switch-case statement
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got patch candidate for that.
>From gcc-bugs-return-610923-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:02:11 2018
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Subject: [Bug gcov-profile/83505] [GCOV] a pointer assignment before a dead return statment lead to incorrect coverage in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Anyway, low priority.
>From gcc-bugs-return-610924-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:03:18 2018
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Subject: [Bug gcov-profile/83678] [GCOV] a pointer assignment before a break statment lead to incorrect coverage in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Due to folding of dead-code it's all optimized out.
>From gcc-bugs-return-610925-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:05:53 2018
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Subject: [Bug gcov-profile/85197] [GCOV] The main function is wrongly marked as executed twice in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
It's true but it's due to infinite loop done by 'while' statement.
>From gcc-bugs-return-610927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:08:29 2018
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Subject: [Bug gcov-profile/85276] [GCOV] A comparative statement with '=', '&&' , '||', and '==' operators is wrongly marked as executed twice in gcov
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, low priority.
>From gcc-bugs-return-610926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:07:16 2018
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Subject: [Bug gcov-profile/85349] [GCOV] struct varaible definition in while(1) will cause incorrect coverage
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, but low priority issue.
>From gcc-bugs-return-610928-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:08:34 2018
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Subject: [Bug testsuite/86660] libgomp.c++/for-15.C ICEs with nvptx offloading
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--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #3)
> (In reply to Jakub Jelinek from comment #2)
> > Created attachment 44437 [details]
> > gcc9-pr86660.patch
> >
> > Untested patch. Does this fix it?
>
> I'll try it out.
Failure mode changes to:
...
/home/vries/openacc/trunk/build-gcc/gcc/xgcc
-B/home/vries/openacc/trunk/build-gcc/gcc/ -x c++
/home/vries/openacc/trunk/source-gcc/libgomp/testsuite/libgomp.c++/for-15.C
-B/home/vries/openacc/trunk/build-gcc/x86_64-pc-linux-gnu/./libgomp/
-B/home/vries/openacc/trunk/build-gcc/x86_64-pc-linux-gnu/./libgomp/.libs
-I/home/vries/openacc/trunk/build-gcc/x86_64-pc-linux-gnu/./libgomp
-I/home/vries/openacc/trunk/source-gcc/libgomp/testsuite/../../include
-I/home/vries/openacc/trunk/source-gcc/libgomp/testsuite/.. -fmessage-length=0
-fno-diagnostics-show-caret -Wno-hsa -fdiagnostics-color=never
-B/home/vries/openacc/trunk/install/offload-nvptx-none/libexec/gcc/x86_64-pc-linux-gnu/9.0.0
-B/home/vries/openacc/trunk/install/offload-nvptx-none/bin -fopenmp -nostdinc++
-I/home/vries/openacc/trunk/build-gcc/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/home/vries/openacc/trunk/build-gcc/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/home/vries/openacc/trunk/source-gcc/libstdc++-v3/libsupc++
-I/home/vries/openacc/trunk/source-gcc/libstdc++-v3/include/backward
-I/home/vries/openacc/trunk/source-gcc/libstdc++-v3/testsuite/util -O2
-std=c++17
-B/home/vries/openacc/trunk/build-gcc/x86_64-pc-linux-gnu/./libgomp/../libstdc++-v3/src/.libs
-L/home/vries/openacc/trunk/build-gcc/x86_64-pc-linux-gnu/./libgomp/.libs
-L/home/vries/openacc/trunk/build-gcc/x86_64-pc-linux-gnu/./libgomp/../libstdc++-v3/src/.libs
-lstdc++ -lm -o ./for-15.exe
ptxas /tmp/ccWklsQO.o, line 124; error : Arguments mismatch for instruction
'mov'
ptxas /tmp/ccWklsQO.o, line 209; fatal : Parsing error near '0xff': syntax
error
ptxas fatal : Ptx assembly aborted due to errors
nvptx-as: ptxas returned 255 exit status
mkoffload: fatal error:
/home/vries/openacc/trunk/install/offload-nvptx-none/bin//x86_64-pc-linux-gnu-accel-nvptx-none-gcc
returned 1 exit status
compilation terminated.
lto-wrapper: fatal error:
/home/vries/openacc/trunk/install/offload-nvptx-none/libexec/gcc/x86_64-pc-linux-gnu/9.0.0//accel/nvptx-none/mkoffload
returned 1 exit status
compilation terminated.
/usr/bin/ld.bfd.real: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
...
The ptxas error is due to the $LLSDA0 in a mov insn, and the .byte:
...
mov.u64 %r53, %ar0;
mov.u64 %r84, __gxx_personality_v0;
st.u64 [%frame+48], %r84;
mov.u64 %r85, $LLSDA0;
st.u64 [%frame+56], %r85;
...
$LLSDA0:
.byte 0xff
.byte 0xff
.byte 0x3
.byte 0
...
>From gcc-bugs-return-610929-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:11:01 2018
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Subject: [Bug gcov-profile/85217] [GCOV] A no side effect statement between a break statement and a continue statement will lead to incorrect code coverage in gcov
Date: Wed, 25 Jul 2018 11:11:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got patch candidate for that.
>From gcc-bugs-return-610930-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:11:55 2018
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Subject: [Bug gcov-profile/85201] [GCOV] A statement with two && operators and a comma operator in the for loop body is wrongly marked in gcov
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, but low priority.
>From gcc-bugs-return-610932-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:22:29 2018
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Subject: [Bug gcov-profile/85336] [GCOV] wrong coverage for builtin functions and "||" logic operators in return statement
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|ASSIGNED |NEW
Assignee|marxin at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, it's created wrongly by gimplfication. Low priority thought.
>From gcc-bugs-return-610931-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:13:37 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/86660] libgomp.c++/for-15.C ICEs with nvptx offloading
Date: Wed, 25 Jul 2018 11:22:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So a nvptx backend bug?
Does ptxas require only decimal constants and not hexadecimal, or require
64-bit load from something that needs to be initialized with 64-bit initializer
rather than series of bytes, something else?
>From gcc-bugs-return-610933-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:22:41 2018
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Subject: [Bug testsuite/86660] libgomp.c++/for-15.C ICEs with nvptx offloading
Date: Wed, 25 Jul 2018 11:23:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
LLSDA labels are for EH support, this testcase doesn't really use exceptions in
any way, but it isn't compiled with -fno-exceptions; but that is the case of
most of the C++ tests in libgomp (I see only 6 OpenACC tests with it), isn't
it?
>From gcc-bugs-return-610934-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:23:59 2018
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From: "abinaya.manikandan at wipro dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86672] New: Facing issue with gcc-4.9.0 while using with llvm-6.0.1
Date: Wed, 25 Jul 2018 11:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86672
Bug ID: 86672
Summary: Facing issue with gcc-4.9.0 while using with
llvm-6.0.1
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: abinaya.manikandan at wipro dot com
Target Milestone: ---
Hi,
We are trying to build llvm-6.0.1 with gcc version 4.9.0.
Please find our machine and installed component details below:
**********************************************************************************
[root@abinaya-llvm6 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.9 (Santiago)
[root@abinaya-llvm6 ~]# gcc --version
gcc (GCC) 4.9.0
Copyright (C) 2014 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.
**********************************************************************************
Please find below command which we are trying to install llvm with gcc:
********************************************************************************
cmake -DCMAKE_INSTALL_PREFIX=%{_prefix} -DCMAKE_BUILD_WITH_INSTALL_RPATH=1 \
-DCMAKE_INSTALL_RPATH=$ORIGIN/../lib:%{gccpath}/lib64\
-DCMAKE_CROSSCOMPILING=True -DCMAKE_BUILD_TYPE=Release \
-Wno-dev --enable-zlib -DCMAKE_BUILD_TYPE=Release \
--enable-gold --enable-plugins \
-DLLVM_ENABLE_ZLIB:BOOL=ON ..
make
make install
********************************************************************************
Only the cmake step getting success.
When we are trying to run "make" facing below issue:
*******************************************************************************
In file included from
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/include/utility:198:0,
from
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/include/algorithm:642,
from
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/src/algorithm.cpp:10:
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/include/__tuple: In
substitution of 'template<bool ..._Pred> using __all =
std::__1::is_same<std::__1::__all_dummy<_Pred ...>,
std::__1::__all_dummy<(void(_Pred), true)...> > [with bool ..._Pred =
{{true}...}]':
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/include/__tuple:401:84:
required from here
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/include/__tuple:395:82:
internal compiler error: unexpected expression '(void({true}), true)...' of
kind expr_pack_expansion
using __all = is_same<__all_dummy<_Pred...>, __all_dummy<((void)_Pred,
true)...>>;
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[2]: ***
[projects/libcxx/lib/CMakeFiles/cxx_objects.dir/__/src/algorithm.cpp.o] Error 1
In file included from
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/include/utility:198:0,
from
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/include/algorithm:642,
from
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/include/__bit_reference:15,
from
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/include/vector:266,
from
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxxabi/src/cxa_demangle.cpp:20:
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/include/__tuple: In
substitution of 'template<bool ..._Pred> using __all =
std::__1::is_same<std::__1::__all_dummy<_Pred ...>,
std::__1::__all_dummy<(void(_Pred), true)...> > [with bool ..._Pred =
{{true}...}]':
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/include/__tuple:401:84:
required from here
/root/rpmbuild/BUILD/llvm-6.0.0.src/projects/libcxx/include/__tuple:395:82:
internal compiler error: unexpected expression '(void({true}), true)...' of
kind expr_pack_expansion
using __all = is_same<__all_dummy<_Pred...>, __all_dummy<((void)_Pred,
true)...>>;
^
*******************************************************************************
Can anyone help me to fix this issue.
Regards,
Abinaya
>From gcc-bugs-return-610935-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 11:31:43 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/86659] [9 regression] gnat.dg/sso/q[23].adb FAIL
Date: Wed, 25 Jul 2018 12:04:00 -0000
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--- Comment #1 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
A reghunt now identified this patch as the culprit:
2018-07-24 Richard Biener <rguenther@suse.de>
* match.pd: Add BIT_FIELD_REF canonicalizations.
Comparing the assembler output, I find
--- /var/gcc/reghunt/pr86659/47386/gcc/testsuite/gnat/q2.s 2018-07-25
13:27:50.135854630 +0000
+++ q2.s 2018-07-25 13:28:06.147647885 +0000
@@ -309,10 +309,7 @@
call __gnat_rcheck_PE_Explicit_Raise, 0
nop
.LL2:
- ldx [%fp+2039], %o0
- call __bswapdi2, 0
- nop
- mov %o0, %g1
+ ldx [%fp+2039], %g1
and %g1, 3, %g1
cmp %g1, 2
be %xcc, .LL3
>From gcc-bugs-return-610936-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 12:04:12 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86672] Facing issue with gcc-4.9.0 while using with llvm-6.0.1
Date: Wed, 25 Jul 2018 12:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 4.9 is no longer supported, you have to try GCC 6 or newer or find a
workaround yourself.
>From gcc-bugs-return-610937-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 12:10:49 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Wed, 25 Jul 2018 12:23:00 -0000
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--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jul 25 12:10:13 2018
New Revision: 262965
URL: https://gcc.gnu.org/viewcvs?rev=262965&root=gcc&view=rev
Log:
2018-07-25 Richard Biener <rguenther@suse.de>
PR debug/86654
* dwarf2out.c (dwarf2out_decl): Do not handle nested functions
special wrt context_die late.
(gen_subprogram_die): Re-use DIEs in local scope.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
>From gcc-bugs-return-610938-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 12:23:47 2018
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From: "arnd at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86673] New: inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 12:29:00 -0000
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Bug ID: 86673
Summary: inline asm sometimes ignores 'register asm("reg")'
declarations
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 44438
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44438&action=edit
linux/net/core/scm.o, preprocessed
Building older linux kernels for ARM with a gcc-8.1 compiler has triggered a
check for broken compiler versions, which compares the register number that is
used in an inline assembly statement with the expected value, for an argument
that was declared with the 'register foo asm ("reg")' syntax described in the
gcc manual under "Specifying Registers for Local Variables".
The diagnostic from the assembler is
$ arm-linux-gnueabi-gcc -Wall -O2 scm.i -c -Wno-pointer-sign
-fno-strict-aliasing
/tmp/ccCGMQmS.s:648: Error: .err encountered
/tmp/ccCGMQmS.s:679: Error: .err encountered
Unfortunately, a change made to the kernel a few years ago had made this go
unnoticed as everyone was testing gcc-8.1 only on more recent kernels that did
not run into the particular check, but may have run into the bug without
triggering the check. Architectures other than arm may also be affected, but
nothing else has this check.
I tested gcc-8.1.0 and today's gcc-8.1.1 (r262956), both with the same result.
I attached one of the files that showed the problem, and reduced this using
creduce to:
int a, c, d, e;
long b;
void fn1() {
int f = ({
({
long g = b, j = g;
register const typeof(c) h asm("r2") = 1, i = d;
__asm__(".ifnc %2,r2; .err; .endif\n\t"
"bl __put_user_4"
: "=&r"(e)
: ""(i), ""(h), ""(j));
e;
});
});
a = f;
}
>From gcc-bugs-return-610939-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 12:29:56 2018
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Subject: [Bug target/86651] [8/9 Regression] lto-wrapper.exe: fatal error: simple_object_copy_lto_debug_sections not implemented: Invalid argument
Date: Wed, 25 Jul 2018 12:39:00 -0000
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--- Comment #4 from jwjagersma at gmail dot com ---
Created attachment 44439
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44439&action=edit
Proposed patch
I cloned the fix that was applied to cygwin/mingw targets in SVN r259347. There
didn't seem to be any way to identify COFF targets for use in dwarf2out.c, so I
defined a new macro TARGET_COFF. I hope this is the right way to do it.
This patch works for me, please review and merge if possible.
>From gcc-bugs-return-610940-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 12:39:38 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/86654] [9 Regression] ICE in gen_member_die, at dwarf2out.c:24933
Date: Wed, 25 Jul 2018 12:42:00 -0000
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--- Comment #16 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #13)
> Just for record, building Firefox w/ GCC 8.1 w/o LTO produces:
>
> VM SIZE FILE SIZE
> -------------- --------------
> 0.0% 0 .debug_info 978Mi 48.5%
> 0.0% 0 .debug_loc 460Mi 22.8%
> 0.0% 0 .debug_str 158Mi 7.9%
> 0.0% 0 .debug_ranges 132Mi 6.6%
> 0.0% 0 .debug_line 111Mi 5.5%
> 67.7% 74.9Mi .text 74.9Mi 3.7%
> 0.0% 0 .strtab 37.8Mi 1.9%
> 0.0% 0 .symtab 14.1Mi 0.7%
> 0.0% 0 .debug_abbrev 11.4Mi 0.6%
> 7.9% 8.75Mi .eh_frame 8.75Mi 0.4%
> 7.7% 8.47Mi .rela.dyn 8.47Mi 0.4%
> 7.7% 8.47Mi .rodata 8.47Mi 0.4%
> 3.8% 4.20Mi .data.rel.ro 4.20Mi 0.2%
> 1.9% 2.05Mi .eh_frame_hdr 2.05Mi 0.1%
> 1.5% 1.65Mi .dynstr 1.65Mi 0.1%
> 0.9% 1.04Mi [Other] 1.33Mi 0.1%
> 0.0% 0 .debug_aranges 1.29Mi 0.1%
> 0.6% 650Ki .bss 0 0.0%
> 0.4% 413Ki .dynsym 413Ki 0.0%
> 0.0% 0 .debug_pubtypes 349Ki 0.0%
> 0.0% 15 [None] 0 0.0%
> 100.0% 110Mi TOTAL 1.97Gi 100.0%
When running dwz on that:
bloaty libxul.so
VM SIZE FILE SIZE
-------------- --------------
0.0% 0 .debug_info 629Mi 37.8%
0.0% 0 .debug_loc 460Mi 27.6%
0.0% 0 .debug_str 158Mi 9.5%
0.0% 0 .debug_ranges 132Mi 8.0%
0.0% 0 .debug_line 111Mi 6.7%
67.7% 74.9Mi .text 74.9Mi 4.5%
0.0% 0 .strtab 37.8Mi 2.3%
0.0% 0 .symtab 14.1Mi 0.8%
0.0% 0 .debug_abbrev 10.3Mi 0.6%
7.9% 8.75Mi .eh_frame 8.75Mi 0.5%
7.7% 8.47Mi .rela.dyn 8.47Mi 0.5%
7.7% 8.47Mi .rodata 8.47Mi 0.5%
3.8% 4.20Mi .data.rel.ro 4.20Mi 0.3%
1.9% 2.05Mi .eh_frame_hdr 2.05Mi 0.1%
1.5% 1.65Mi .dynstr 1.65Mi 0.1%
0.0% 0 .debug_aranges 1.29Mi 0.1%
0.7% 805Ki [Other] 815Ki 0.0%
0.6% 650Ki .bss 0 0.0%
0.4% 413Ki .dynsym 413Ki 0.0%
0.2% 255Ki .rela.plt 255Ki 0.0%
0.0% 15 [None] 0 0.0%
100.0% 110Mi TOTAL 1.63Gi 100.0%
I'll test LTO build as well.
>From gcc-bugs-return-610941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 12:42:01 2018
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Subject: [Bug testsuite/86660] libgomp.c++/for-15.C ICEs with nvptx offloading
Date: Wed, 25 Jul 2018 12:43:00 -0000
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--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #6)
> LLSDA labels are for EH support, this testcase doesn't really use exceptions
> in any way, but it isn't compiled with -fno-exceptions; but that is the case
> of most of the C++ tests in libgomp (I see only 6 OpenACC tests with it),
> isn't it?
The test-case compiles with -fno-exceptions, but fails in execution here:
...
192 check (i >= 75 && i < 1945 && (i - 75) % 3 == 0);
...
We'll have to analyze that.
I think fexceptions is not implemented for nvptx. setjmp/longjmp is not
supported on nvptx, so using that variant is not possible. The other
possibility is using dwarf exceptions, but that is not setup. I think it could
be possible to use that for nvptx, but I expect modifications are needed to
deal with propagating exceptions from offloaded to host code.
>From gcc-bugs-return-610942-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 12:43:48 2018
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Subject: [Bug target/86673] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 12:47:00 -0000
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--- Comment #1 from Arnd Bergmann <arnd at linaro dot org> ---
Further inspection shows that this happens for the cases where the input
argument to the inline asm is a compile-time constant, but not for those that
are variables.
>From gcc-bugs-return-610943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 12:47:07 2018
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Subject: [Bug target/86651] [8/9 Regression] lto-wrapper.exe: fatal error: simple_object_copy_lto_debug_sections not implemented: Invalid argument
Date: Wed, 25 Jul 2018 12:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-07-25
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to jwjagersma from comment #4)
> Created attachment 44439 [details]
> Proposed patch
>
> I cloned the fix that was applied to cygwin/mingw targets in SVN r259347.
> There didn't seem to be any way to identify COFF targets for use in
> dwarf2out.c, so I defined a new macro TARGET_COFF. I hope this is the right
> way to do it.
>
> This patch works for me, please review and merge if possible.
Thanks, that looks good to me. Can you post the patch to
gcc-patches@gcc.gnu.org
please and state how you tested the patch (I suppose bootstrap was OK, etc.)?
I'll take care of integrating the fix then.
>From gcc-bugs-return-610944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 12:55:20 2018
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Subject: [Bug target/86673] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 12:56:00 -0000
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Arnd Bergmann <arnd at linaro dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mkuvyrkov at gcc dot gnu.org
--- Comment #2 from Arnd Bergmann <arnd at linaro dot org> ---
Forcing constant inputs for put_user to be read from a volatile variable avoids
this problem and lets me cleanly build all files that showed it.
diff --git a/arch/arm/include/asm/uaccess.h b/arch/arm/include/asm/uaccess.h
index 35c9db857ebe..23e92a9a5ef4 100644
--- a/arch/arm/include/asm/uaccess.h
+++ b/arch/arm/include/asm/uaccess.h
@@ -251,7 +251,8 @@ extern int __put_user_8(void *, unsigned long long);
({ \
unsigned long __limit = current_thread_info()->addr_limit - 1;
\
const typeof(*(p)) __user *__tmp_p = (p); \
- register const typeof(*(p)) __r2 asm("r2") = (x); \
+ const typeof(*(p)) __x = (x); \
+ register const typeof(*(p)) __r2 asm("r2") = READ_ONCE(__x);
\
register const typeof(*(p)) __user *__p asm("r0") = __tmp_p; \
register unsigned long __l asm("r1") = __limit; \
register int __e asm("r0"); \
This confirms that constant inputs are what leads to the problem.
>From gcc-bugs-return-610945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 12:56:21 2018
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Subject: [Bug target/86651] [8/9 Regression] lto-wrapper.exe: fatal error: simple_object_copy_lto_debug_sections not implemented: Invalid argument
Date: Wed, 25 Jul 2018 13:02:00 -0000
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--- Comment #6 from jwjagersma at gmail dot com ---
(In reply to Richard Biener from comment #5)
After building a more complex program with the above patch (applied to gcc
8.1.0 release sources), this ICE appears during linking:
lto1.exe: internal compiler error: in gen_subprogram_die, at dwarf2out.c:22668
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper.exe: fatal error:
D:\msys64\usr\local\cross\bin\i586-pc-msdosdjgpp-g++.exe returned 1 exit status
compilation terminated.
collect2.exe: fatal error: lto-wrapper returned 1 exit status
compilation terminated.
Being entirely unfamiliar with gcc internals, I'm not sure what went wrong
here.
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Subject: [Bug c/86667] [7/8/9 Regression] can no longer traverse environment table
Date: Wed, 25 Jul 2018 13:02:00 -0000
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The test works as expected if I replace
*ep=*ep++;
with
*ep++;
in the C file.
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Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 13:10:00 -0000
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |arm-none-linux-gnueabi ,
| |arm-none-eabi
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-07-25
CC| |ramana at gcc dot gnu.org
Known to work| |7.2.0
Summary|inline asm sometimes |[8/9 regression] inline asm
|ignores 'register |sometimes ignores 'register
|asm("reg")' declarations |asm("reg")' declarations
Ever confirmed|0 |1
Known to fail| |8.1.0, 9.0
--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
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--- Comment #4 from Andreas Schwab <schwab@linux-m68k.org> ---
Why are you using empty constraints when a register is required?
>From gcc-bugs-return-610949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 13:13:44 2018
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Subject: [Bug c/86667] [7/8/9 Regression] can no longer traverse environment table
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Andreas Schwab <schwab@linux-m68k.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Andreas Schwab <schwab@linux-m68k.org> ---
*ep=*ep++ is undefined.
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Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
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--- Comment #5 from Arnd Bergmann <arnd at linaro dot org> ---
(In reply to Andreas Schwab from comment #4)
> Why are you using empty constraints when a register is required?
creduce did that, it had no effect on the result. The original source looks
like:
#define __get_user_x_64t(__r2, __p, __e, __l, __s) \
__asm__ __volatile__ ( \
__asmeq("%0", "r0") __asmeq("%1", "r2") \
__asmeq("%3", "r1") \
"bl __get_user_64t_" #__s \
: "=&r" (__e), "=r" (__r2) \
: "0" (__p), "r" (__l) \
: __GUP_CLOBBER_##__s)
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Subject: [Bug target/86651] [8/9 Regression] lto-wrapper.exe: fatal error: simple_object_copy_lto_debug_sections not implemented: Invalid argument
Date: Wed, 25 Jul 2018 13:40:00 -0000
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--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 25 Jul 2018, jwjagersma at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86651
>
> --- Comment #6 from jwjagersma at gmail dot com ---
> (In reply to Richard Biener from comment #5)
>
> After building a more complex program with the above patch (applied to gcc
> 8.1.0 release sources), this ICE appears during linking:
>
> lto1.exe: internal compiler error: in gen_subprogram_die, at dwarf2out.c:22668
> libbacktrace could not find executable to open
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <https://gcc.gnu.org/bugs/> for instructions.
> lto-wrapper.exe: fatal error:
> D:\msys64\usr\local\cross\bin\i586-pc-msdosdjgpp-g++.exe returned 1 exit status
> compilation terminated.
> collect2.exe: fatal error: lto-wrapper returned 1 exit status
> compilation terminated.
>
> Being entirely unfamiliar with gcc internals, I'm not sure what went wrong
> here.
There are latent bugs that now affect darwin, mingw and djgpp (after your
patch) by default when compiling with -g0 and linking with -g
(which is basically what those patches enforce).
Some of them have been fixed on the GCC 8 branch already so I suggest
you use the GCC 8.2 release candidate tarball to see if it works there.
(ftp://gcc.gnu.org/pub/gcc/snapshots/8.2.0-RC-20180719/)
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Subject: [Bug fortran/86599] Problems building libgfortran from 7.2.0 on HP-UX 11.31/PA
Date: Wed, 25 Jul 2018 13:46:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-07-25
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--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This looks like a target issue. Have you ever build gcc on HP-UX 11.31/PA?
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Subject: [Bug c++/86672] Facing issue with gcc-4.9.0 while using with llvm-6.0.1
Date: Wed, 25 Jul 2018 13:55:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
What possible reason could you have to use gcc-4.9.0 instead of gcc-4.9.4?
Anyway this seems to be a duplicate of PR 66426 which is fixed in gcc-5
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86599
--- Comment #7 from The Written Word <bugzilla-gcc at thewrittenword dot com> ---
(In reply to Dominique d'Humieres from comment #6)
> This looks like a target issue. Have you ever build gcc on HP-UX 11.31/PA?
Definitely a target issue. With some patches I can build gcc 4.x on 11.31/PA. I
am building 8.1.0 now with a fixinc patch to address the issue I am raising in
this PR. I don't know how to quickly test a fixinc patch without doing a full
rebuild so it's taking awhile. Should know by the end of the day.
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From: "jwyatt at feralinteractive dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug pch/86674] New: -W(no)-error=invalid-pch does not affect incorrect language warning
Date: Wed, 25 Jul 2018 14:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86674
Bug ID: 86674
Summary: -W(no)-error=invalid-pch does not affect incorrect
language warning
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: pch
Assignee: unassigned at gcc dot gnu.org
Reporter: jwyatt at feralinteractive dot com
Target Milestone: ---
-Werror=invalid-pch does not turn warnings caused by -Winvalid-pch into errors.
-Wno-error=invalid-pch does not turn errors caused by -Winvalid-pch -Werror
into warnings.
Context:
When compiling the same prefix for multiple languages,
https://gcc.gnu.org/onlinedocs/gcc/Precompiled-Headers.html suggests that they
can all co-exist in the same folder, since the compiler will search them all
and choose the correct one. However this will cause
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=17162.
As a result, in cases where -Werror is enabled, it would be useful to turn
-Winvalid-pch back into a warning.
Example - the contents of the files are irrelevant, just use empty files if
need be:
gcc -Wall -Wextra -x c-header Prefix.h -o Prefix.h.gch/c.h
gcc -Wall -Wextra -x c++-header Prefix.h -o Prefix.h.gch/c++.h
gcc -Wall -Wextra -Winvalid-pch -Werror -Wno-error=invalid-pch -include
Prefix.h -c Test.c
gcc -Wall -Wextra -Winvalid-pch -Werror -Wno-error=invalid-pch -include
Prefix.h -c Test.cpp
This produces only the following output:
cc1plus: error: ./Prefix.h.gch/c.h: not for GNU C++14 [-Werror]
cc1plus: all warnings being treated as errors
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 14:07:00 -0000
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--- Comment #6 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
The following simpler testcase also shows the problem:
void fn1() {
register const int h asm("r2") = 1;
__asm__(".ifnc %0,r2; .err; .endif\n\t"
"bl __put_user_4" :: "r"(h));
}
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Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 14:14:00 -0000
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--- Comment #7 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Thomas Preud'homme from comment #6)
> The following simpler testcase also shows the problem:
>
> void fn1() {
> register const int h asm("r2") = 1;
> __asm__(".ifnc %0,r2; .err; .endif\n\t"
> "bl __put_user_4" :: "r"(h));
> }
The register label gets optimized during gimple stages.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 14:37:00 -0000
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--- Comment #8 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Thomas Preud'homme from comment #7)
> (In reply to Thomas Preud'homme from comment #6)
> > The following simpler testcase also shows the problem:
> >
> > void fn1() {
> > register const int h asm("r2") = 1;
> > __asm__(".ifnc %0,r2; .err; .endif\n\t"
> > "bl __put_user_4" :: "r"(h));
> > }
>
> The register label gets optimized during gimple stages.
Dump for original already shows propagation of the constant has happened which
later lead to the removal of the register declaration:
;; Function fn1 (null)
;; enabled by -tree-original
{
register const int h __asm__ (*r2) = 1;
register const int h __asm__ (*r2) = 1;
__asm__ __volatile__(".ifnc %0,r2; .err; .endif\n\tbl\t__put_user_4"::"r" 1);
}
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Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 14:47:00 -0000
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--- Comment #9 from Arnd Bergmann <arnd at linaro dot org> ---
Reproduced on arm64 and x86 as well, see x86 version:
void fn1() {
register const int h asm("edx") = 1;
__asm__(".ifnc %0,edx; .err; .endif" :: "r"(h));
}
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Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 14:49:00 -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 #10 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
See PR 85745 where Jakub said,
The reason this happens is that the register variable is marked const. Don't
do that. If it is const, the compiler optimizes it more aggressively - it will
happily fold uses of the variable to the constant ininitializer, so the inline
asm becomes "r" (110) instead of "r" (__r2) and thus it can use any register.
This is how C++ behaved for years and how C in GCC behaves since the folding
improvements.
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Subject: [Bug debug/86675] New: C++ lambdas are not debugable with -std=c++17 (or above) and -Og
Date: Wed, 25 Jul 2018 14:59:00 -0000
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Bug ID: 86675
Summary: C++ lambdas are not debugable with -std=c++17 (or
above) and -Og
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
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Created attachment 44440
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44440&action=edit
Example program
If I compile the attached (main.cpp) test program
int main() {
return [] {
return 000031415;
}();
}
with the following options I'm unable to debug it
g++ main.cpp -std=c++17 -g -Og
g++ main.cpp -std=c++2a -g -Og
using the following compile options debugging works as expected
g++ main.cpp -std=c++17 -g -O0
g++ main.cpp -std=c++2a -g -O0
g++ main.cpp -std=c++11 -g -Og
g++ main.cpp -std=c++14 -g -Og
g++ main.cpp -std=c++14 -g -Og
The attached script test.sh reports the following
Success: Standard c++11 Optimization 0
Success: Standard c++14 Optimization 0
Success: Standard c++17 Optimization 0
Success: Standard c++2a Optimization 0
Success: Standard c++11 Optimization g
Success: Standard c++14 Optimization g
Failed: Standard c++17 Optimization g
Failed: Standard c++2a Optimization g
Systems used: Archlinux (last updated 2018-07-25)
g++ -v
Using built-in specs.
COLLECT_GCC=/usr/bin/g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/8.1.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
Thread model: posix
gcc version 8.1.1 20180531 (GCC)
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Subject: [Bug testsuite/86660] libgomp.c++/for-15.C ICEs with nvptx offloading
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--- Comment #8 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #7)
> (In reply to Jakub Jelinek from comment #6)
> > LLSDA labels are for EH support, this testcase doesn't really use exceptions
> > in any way, but it isn't compiled with -fno-exceptions; but that is the case
> > of most of the C++ tests in libgomp (I see only 6 OpenACC tests with it),
> > isn't it?
>
> The test-case compiles with -fno-exceptions, but fails in execution here:
> ...
> 192 check (i >= 75 && i < 1945 && (i - 75) % 3 == 0);
> ...
> We'll have to analyze that.
>
Hmm, for me that minimizes to:
...
extern "C" void abort ();
#pragma omp declare target
int results[2000];
#pragma omp end declare target
int
main ()
{
#pragma omp target teams map (always, tofrom: results)
{
results[75] = 1;
}
if (results[75] == 0)
abort ();
}
...
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/86660] libgomp.c++/for-15.C ICEs with nvptx offloading
Date: Wed, 25 Jul 2018 15:01:00 -0000
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--- Comment #9 from cesar at gcc dot gnu.org ---
(In reply to Tom de Vries from comment #8)
> Hmm, for me that minimizes to:
> ...
> extern "C" void abort ();
>
> #pragma omp declare target
> int results[2000];
> #pragma omp end declare target
>
> int
> main ()
> {
> #pragma omp target teams map (always, tofrom: results)
> {
> results[75] = 1;
> }
> if (results[75] == 0)
> abort ();
> }
> ...
If omp declare target behaves like acc declare, wouldn't you still need to
update the host's copy of results? I'd expect results[75] to be zero outside of
the omp target region.
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Subject: [Bug debug/86675] C++ lambdas are not debugable with -std=c++17 (or above) and -Og
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--- Comment #1 from Bernd Amend <bernd.amend at outlook dot com> ---
Created attachment 44441
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44441&action=edit
Script to test the compiler with different command line args
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Subject: [Bug c/86670] unsized static array var is removed but still accessed.
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 19315.
*** This bug has been marked as a duplicate of bug 19315 ***
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Subject: [Bug testsuite/86660] libgomp.c++/for-15.C ICEs with nvptx offloading
Date: Wed, 25 Jul 2018 15:06:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Indeed, lowering ignores map clauses for declare target to global vars, but it
can do that only if always is not present. Will have a look.
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Subject: [Bug c/19315] document undocumented extension that allows code where variable is not emitted in the asm
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |iains at gcc dot gnu.org
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 86670 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-610968-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 15:21:43 2018
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From: "jwjagersma at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86651] [8/9 Regression] lto-wrapper.exe: fatal error: simple_object_copy_lto_debug_sections not implemented: Invalid argument
Date: Wed, 25 Jul 2018 15:29:00 -0000
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--- Comment #8 from jwjagersma at gmail dot com ---
(In reply to rguenther@suse.de from comment #7)
> There are latent bugs that now affect darwin, mingw and djgpp (after your
> patch) by default when compiling with -g0 and linking with -g
> (which is basically what those patches enforce).
>
> Some of them have been fixed on the GCC 8 branch already so I suggest
> you use the GCC 8.2 release candidate tarball to see if it works there.
> (ftp://gcc.gnu.org/pub/gcc/snapshots/8.2.0-RC-20180719/)
I successfully built the snapshot you linked with this patch applied, but
compiling my c++ program still generated the same ICE.
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From: "arnd at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 15:43:00 -0000
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--- Comment #11 from Arnd Bergmann <arnd at linaro dot org> ---
I have checked all instances of 'register const' or 'const register' in the
current linux kernel (4.18-rc), and we never assign a constant expression to
any of them, so I guess none of them are affected:
arch/arm/include/asm/uaccess.h: register const void __user *__p
asm("r0") = __ptr; \
arch/h8300/kernel/sim-console.c: register const char *_ptr
__asm__("er1") = s;
arch/h8300/kernel/sim-console.c: register const unsigned _len
__asm__("er2") = n;
arch/mips/include/asm/uaccess.h: register const void __user *__cu_from_r
__asm__("$5"); \
arch/mips/include/asm/uaccess.h: register const void *__cu_from_r
__asm__("$5"); \
arch/riscv/kernel/process.c: const register unsigned long gp __asm__
("gp");
arch/riscv/kernel/stacktrace.c: const register unsigned long current_sp
__asm__ ("sp");
arch/riscv/kernel/stacktrace.c: const register unsigned long current_sp
__asm__ ("sp");
Should we drop the 'const' for all of them as a rule? If there is no use case
for ever using a 'const register' variable and it can lead to bugs, should gcc
warn about it in the future?
Should this issue be mentioned in the documentation in
https://gcc.gnu.org/onlinedocs/gcc/Local-Register-Variables.html?
I also checked all instances in linux-4.4, and the ARM put_user() helper is the
only one I see that gets a constant expression input, so I suppose that is all
that needs to be fixed in backports, unless someone thinks we should get rid of
all them in backports as well.
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Subject: [Bug c/19315] document undocumented extension that allows code where variable is not emitted in the asm
Date: Wed, 25 Jul 2018 15:44:00 -0000
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--- Comment #7 from Iain Sandoe <iains at gcc dot gnu.org> ---
IMHO (as you say in c#3) this is "surprising behaviour"
* if there's any case you'd want it - then maybe you should have to ask for
it.
(so if it's intentional it should be behind some flag?)
* it ought to warn by default (not require '-pedantic').
* as Richi commented in 86670, it means grokdeclarator has conflicting storage
classes which doesn't seem like a useful idea for maintenance.
I guess the point is "what do we want the behaviour to be?".
Documenting it doesn't seem to really make it less surprising (if it's an
'extension' then one ought to be able to identify a sensible use-case and put
it in the test-suite).
>From gcc-bugs-return-610971-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 15:44:02 2018
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Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 15:51:00 -0000
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--- Comment #12 from Andreas Schwab <schwab@linux-m68k.org> ---
arch/h8300/kernel/sim-console.c: register const int fd __asm__("er0") =
1; /* stdout */
>From gcc-bugs-return-610972-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 15:51:55 2018
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Subject: [Bug target/86651] [8/9 Regression] lto-wrapper.exe: fatal error: simple_object_copy_lto_debug_sections not implemented: Invalid argument
Date: Wed, 25 Jul 2018 15:57:00 -0000
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--- Comment #9 from rguenther at suse dot de <rguenther at suse dot de> ---
On July 25, 2018 5:21:38 PM GMT+02:00, jwjagersma at gmail dot com
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86651
>
>--- Comment #8 from jwjagersma at gmail dot com ---
>(In reply to rguenther@suse.de from comment #7)
>> There are latent bugs that now affect darwin, mingw and djgpp (after
>your
>> patch) by default when compiling with -g0 and linking with -g
>> (which is basically what those patches enforce).
>>
>> Some of them have been fixed on the GCC 8 branch already so I suggest
>> you use the GCC 8.2 release candidate tarball to see if it works
>there.
>> (ftp://gcc.gnu.org/pub/gcc/snapshots/8.2.0-RC-20180719/)
>
>I successfully built the snapshot you linked with this patch applied,
>but
>compiling my c++ program still generated the same ICE.
Thanks for checking. Do you maybe can make preprocessed source of required CUs
available? You can reduce the set of needed inputs by using -shared at link
time so unresolved symbols are considered OK.
>From gcc-bugs-return-610973-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 15:57:02 2018
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From: "arnd at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 16:02:00 -0000
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--- Comment #13 from Arnd Bergmann <arnd at linaro dot org> ---
(In reply to Andreas Schwab from comment #12)
> arch/h8300/kernel/sim-console.c: register const int fd __asm__("er0") = 1;
I found that too, and then noticed it is already fixed in linux-next:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=14cf9451be78f8a
Ard points out that most of the other ones are pointers to const data, which
are not a problem. This leaves the arm put_user bug as the only definite
problem that needs to be addressed in older kernels.
The three arch/riscv instances of 'const register unsigned long gp __asm__
("gp")' are different because they are never passed into an inline assembly as
far as I can tell. This seems to be unsupported for local register variables
according to the gcc documentation, but if that's a problem, it's unrelated to
this bug.
>From gcc-bugs-return-610974-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 16:02:49 2018
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Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #14 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Indeed, I agree the documentation should mention that (I can write a patch).
IIRC 'volatile register' also does not behave intuitively (I'll try to double
check).
I'm unsure about a warning, it seems "doing it right" might require changes in
both C and C++ frontends, and issuing a warning only if an asm statement using
the register variable is present?
Adding Jakub to Cc.
>From gcc-bugs-return-610975-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 16:13:06 2018
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Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 16:14:00 -0000
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
register const void __user *__p asm("r0") = __ptr;
etc. isn't a problem, here __p isn't const, only *__p is. The problem is if
the register variable itself is const.
So
arch/h8300/kernel/sim-console.c: register const unsigned _len
__asm__("er2") = n;
If n can be a constant or is const var initialized to constant etc.
The cases where a const register var doesn't have an initializer aren't a
problem either.
I don't see what should we warn about.
>From gcc-bugs-return-610976-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 16:14:31 2018
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Subject: [Bug fortran/86587] Derived-type with attributes BIND(C) and PRIVATE raises an error but standard accepts it
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Keywords| |rejects-valid
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Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-07-25
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from at least 4.3.1 up to trunk (9.0).
>From gcc-bugs-return-610977-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 16:20:30 2018
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Subject: [Bug c/86668] mixing ansi prototype with K&R definition
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--- Comment #2 from amr <amrosalem820 at gmail dot com> ---
(In reply to Andreas Schwab from comment #1)
> Please use gcc-help@gcc.gnu.org for user questions.
>
> With the prototype in scope the non-prototyped definition of fun is
> adjusted. This doesn't happen if the prototype is no longer in scope. If
> you want defined behaviour you need to use the correct prototype with the
> argument declared as double.
what is the meaning of in scope here , sir ,,
>From gcc-bugs-return-610978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 16:21:40 2018
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Subject: [Bug c/86668] mixing ansi prototype with K&R definition
Date: Wed, 25 Jul 2018 16:27:00 -0000
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--- Comment #3 from amr <amrosalem820 at gmail dot com> ---
(In reply to Andreas Schwab from comment #1)
> Please use gcc-help@gcc.gnu.org for user questions.
>
> With the prototype in scope the non-prototyped definition of fun is
> adjusted. This doesn't happen if the prototype is no longer in scope. If
> you want defined behaviour you need to use the correct prototype with the
> argument declared as double.
what is the meaning of in scope here , sir ,,
>From gcc-bugs-return-610979-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 16:27:46 2018
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Subject: [Bug c/19315] document undocumented extension that allows code where variable is not emitted in the asm
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19315
--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On July 25, 2018 5:50:40 PM GMT+02:00, "egallager at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19315
>
>Eric Gallager <egallager at gcc dot gnu.org> changed:
>
> What |Removed |Added
>----------------------------------------------------------------------------
> CC| |rguenth at gcc dot gnu.org,
> | |schwab at gcc dot gnu.org
Just remove the extension and see where in the testsuite it fails. If it
doesn't, simply remove it.
>From gcc-bugs-return-610980-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 16:47:13 2018
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Subject: [Bug c++/85515] Bogus suggestions from "GCC's leaky abstractions"
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85515
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jul 25 16:46:34 2018
New Revision: 262975
URL: https://gcc.gnu.org/viewcvs?rev=262975&root=gcc&view=rev
Log:
PR c++/85515
* cp-tree.h (enum cp_tree_index): Add
CPTI_FOR_{RANGE,BEGIN,END}{,_}_IDENTIFIER.
(for_range__identifier, for_begin__identifier, for_end__identifier,
for_range_identifier, for_begin_identifier, for_end_identifier):
Define.
* decl.c (initialize_predefined_identifiers): Initialize
for_{range,begin,end}{,_}_identifier.
* parser.c (build_range_temp): Use for_range__identifier instead of
get_identifier ("__for_range").
(cp_convert_range_for): Use for_begin__identifier and
for_end__identifier instead of get_identifier ("__for_begin") and
get_identifier ("__for_end").
* semantics.c (finish_for_stmt): Rename "__for_{range,begin,end} "
local symbols to "__for_{range,begin,end}".
* g++.dg/pr85515-2.C: Add expected dg-error.
* g++.dg/cpp0x/range-for36.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/range-for36.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl.c
trunk/gcc/cp/parser.c
trunk/gcc/cp/semantics.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/pr85515-2.C
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
Date: Wed, 25 Jul 2018 16:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86673
--- Comment #16 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
> I don't see what should we warn about.
I think the suggestion was to warn when a register const variable appears in
constraints, because the asm is not then guaranteed to receive that operand in
that register, contrary to user's expectations? So basically warn about this
non-intuitive aspect of local reg vars so the places where the code makes a
wrong assumption can be identified and fixed.
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Subject: [Bug c/86668] mixing ansi prototype with K&R definition
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86668
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
https://en.cppreference.com/w/c/language/scope
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Subject: [Bug target/86673] [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86673
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #17 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 85745.
*** This bug has been marked as a duplicate of bug 85745 ***
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Subject: [Bug c/85745] variable with asm register assignment allocated in wrong reg
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|rtl-optimization |c
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
C++ version of this issue is bug 56715.
>From gcc-bugs-return-610983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jul 25 17:26:37 2018
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