* [Bug inline-asm/69899] gcc ICE on invalid code on x86_64-linux-gnu in "replace_reg"
[not found] <bug-69899-4@http.gcc.gnu.org/bugzilla/>
@ 2018-12-08 6:29 ` asolokha at gmx dot com
2020-12-02 17:06 ` gscfq@t-online.de
` (3 subsequent siblings)
4 siblings, 0 replies; 5+ messages in thread
From: asolokha at gmx dot com @ 2018-12-08 6:29 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69899
Arseny Solokha <asolokha at gmx dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |asolokha at gmx dot com
--- Comment #3 from Arseny Solokha <asolokha at gmx dot com> ---
I cannot reproduce this ICE on all active branches.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79636] [7/8/9 Regression] ICE in assign_by_spills, at lra-assigns.c:1457
Date: Sat, 08 Dec 2018 06:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79636
Arseny Solokha <asolokha at gmx dot com> changed:
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CC| |asolokha at gmx dot com
--- Comment #5 from Arseny Solokha <asolokha at gmx dot com> ---
In my setup, a current trunk snapshot and gcc 8 don't ICE, and gcc 7 still
does.
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Subject: [Bug target/80540] gcc ICE at -O2 and above on x86_64-linux-gnu in "assign_by_spills"
Date: Sat, 08 Dec 2018 06:30:00 -0000
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Arseny Solokha <asolokha at gmx dot com> changed:
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--- Comment #5 from Arseny Solokha <asolokha at gmx dot com> ---
In my setup, a current trunk snapshot and gcc 8 don't ICE. Curiously, gcc 4.9
doesn't ICE too. So it's either semi-latent and gets unfortunate exposure at
times, or was fixed at some point.
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Subject: [Bug tree-optimization/88415] New: [7/8/9 Regression] ICE: verify_gimple failed (error: dead STMT in EH table)
Date: Sat, 08 Dec 2018 06:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88415
Bug ID: 88415
Summary: [7/8/9 Regression] ICE: verify_gimple failed (error:
dead STMT in EH table)
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code, openmp
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-9.0.0-alpha20181202 snapshot (r266729), 8.2, 7.4 ICE when compiling the
following snippet w/ -fexceptions -fnon-call-exceptions -fopenmp
-fsignaling-nans -funsafe-math-optimizations:
void
lx (_Complex int *yn)
{
int mj;
#pragma omp for
for (mj = 0; mj < 1; ++mj)
yn[mj] += 1;
}
% gcc-9.0.0-alpha20181202 -fexceptions -fnon-call-exceptions -fopenmp
-fsignaling-nans -funsafe-math-optimizations -w -c zgxacany.c
zgxacany.c: In function 'lx':
zgxacany.c:2:1: error: dead STMT in EH table
2 | lx (_Complex int *yn)
| ^~
# VUSE <.MEM_12>
_26 = *_3;
during GIMPLE pass: cplxlower0
zgxacany.c:2:1: internal compiler error: verify_gimple failed
0xd5107d verify_gimple_in_cfg(function*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/tree-cfg.c:5422
0xc2523f execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/passes.c:1977
0xc2617e execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/passes.c:2031
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Subject: [Bug target/88414] New: [9 Regression] ICE in lra_assign, at lra-assigns.c:1624
Date: Sat, 08 Dec 2018 06:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88414
Bug ID: 88414
Summary: [9 Regression] ICE in lra_assign, at
lra-assigns.c:1624
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-unknown-linux-gnu
gcc-9.0.0-alpha20181202 snapshot (r266729) for x86_64 ICEs when compiling
gcc/testsuite/gcc.target/m68k/pr45015.c w/ -O1 (-Og) -ftrapv:
% x86_64-unknown-linux-gnu-gcc-9.0.0-alpha20181202 -O1 -ftrapv -c
gcc/testsuite/gcc.target/m68k/pr45015.c
gcc/testsuite/gcc.target/m68k/pr45015.c: In function 'foo':
gcc/testsuite/gcc.target/m68k/pr45015.c:16:7: error: 'asm' operand has
impossible constraints
16 | __asm__ ("move.l %2, %0; move.l %3, %1" : "=d" (b), "=d" (c) :
"g<>" (y[j]), "d" (w));
| ^~~~~~~
during RTL pass: reload
gcc/testsuite/gcc.target/m68k/pr45015.c:26:1: internal compiler error: in
lra_assign, at lra-assigns.c:1624
26 | }
| ^
0xb897d0 lra_assign(bool&)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/lra-assigns.c:1624
0xb8443d lra(_IO_FILE*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/lra.c:2508
0xb3b929 do_reload
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/ira.c:5469
0xb3b929 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/ira.c:5653
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Subject: [Bug rtl-optimization/88416] New: [8/9 Regression] ICE in in df_uses_record, at df-scan.c:3013
Date: Sat, 08 Dec 2018 06:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88416
Bug ID: 88416
Summary: [8/9 Regression] ICE in in df_uses_record, at
df-scan.c:3013
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
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Target: x86_64-unknown-linux-gnu
gcc-9.0.0-alpha20181202 snapshot (r266729) and gcc 8.2 ICE when compiling
gcc/testsuite/gcc.target/i386/writeeflags-1.c w/ -O1 (-Og)
-fvar-tracking-assignments -fno-forward-propagate --param max-cse-insns=1:
% x86_64-unknown-linux-gnu-gcc-9.0.0-alpha20181202 -O1
-fvar-tracking-assignments -fno-forward-propagate --param max-cse-insns=1 -c
gcc/testsuite/gcc.target/i386/writeeflags-1.c
during RTL pass: combine
gcc/testsuite/gcc.target/i386/writeeflags-1.c: In function 'main':
gcc/testsuite/gcc.target/i386/writeeflags-1.c:31:1: internal compiler error: in
df_uses_record, at df-scan.c:3013
31 | }
| ^
0x5f20d6 df_uses_record
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/df-scan.c:3013
0x93ed66 df_insn_refs_collect
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/df-scan.c:3222
0x93f127 df_insn_refs_verify
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/df-scan.c:4088
0x940af3 df_insn_rescan(rtx_insn*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/df-scan.c:1065
0x9424d6 df_process_deferred_rescans()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/df-scan.c:1246
0x92d57a df_finish_pass(bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/df-core.c:651
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Subject: [Bug tree-optimization/58318] very slow compilation on x86_64-linux with -O3 and -g and checking enabled
Date: Sat, 08 Dec 2018 06:47:00 -0000
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Arseny Solokha <asolokha at gmx dot com> changed:
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----------------------------------------------------------------------------
CC| |asolokha at gmx dot com
--- Comment #4 from Arseny Solokha <asolokha at gmx dot com> ---
I cannot reproduce it on all active branches. It looks like 4.8 was the last
branch w/ this issue.
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88413] g++ mangles names involving unresolved names in function argument template parameters differently from the ABI standard.
Date: Sat, 08 Dec 2018 07:37:00 -0000
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
GCC has the following in it:
::= sr <type> <unqualified-name> # dependent name
::= sr <type> <unqualified-name> <template-args> */
Hmm, maybe the ABI changed and GCC did not change with it ...
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Subject: [Bug libgomp/87995] [9 regression] libgomp.c/../libgomp.c-c++-common/cancel-taskgroup-3.c fails consistently after r265930
Date: Sat, 08 Dec 2018 08:59:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 8 08:58:24 2018
New Revision: 266904
URL: https://gcc.gnu.org/viewcvs?rev=266904&root=gcc&view=rev
Log:
PR libgomp/87995
* testsuite/libgomp.c-c++-common/cancel-taskgroup-3.c: Require
tls_runtime effective target.
(t): New threadprivate variable.
(main): Set t in threads which execute iterations of the worksharing
loop. Propagate that to the task after the loop and don't abort
if the current taskgroup hasn't been cancelled.
Modified:
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.c-c++-common/cancel-taskgroup-3.c
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Subject: [Bug libgomp/87995] [9 regression] libgomp.c/../libgomp.c-c++-common/cancel-taskgroup-3.c fails consistently after r265930
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug rtl-optimization/88390] [9 regression] g++.dg/tree-prof/pr57451.C FAILs
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Component|c++ |rtl-optimization
--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Recategorizing.
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Subject: [Bug c++/88410] [8/9 Regression] internal compiler error: output_operand: invalid expression as operand
Date: Sat, 08 Dec 2018 10:20:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-08
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |8.3
Summary|internal compiler error: |[8/9 Regression] internal
|output_operand: invalid |compiler error:
|expression as operand |output_operand: invalid
| |expression as operand
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase:
typedef __UINTPTR_TYPE__ uintptr_t;
const uintptr_t a = 2;
struct C { int b; };
uintptr_t c { uintptr_t (&reinterpret_cast<C *>(a)->b) };
Started with my r259458.
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Subject: [Bug c++/88410] [8/9 Regression] internal compiler error: output_operand: invalid expression as operand
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45190
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45190&action=edit
gcc9-pr88410.patch
Untested fix. Why doesn't libdart use offsetof though?
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Subject: [Bug rtl-optimization/88390] [9 regression] g++.dg/tree-prof/pr57451.C FAILs
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Sat Dec 8 11:07:53 2018
New Revision: 266906
URL: https://gcc.gnu.org/viewcvs?rev=266906&root=gcc&view=rev
Log:
PR rtl-optimization/88390
* dwarf2cfi.c (struct dw_cfi_row): Add window_save field.
(cfi_row_equal_p): Compare it.
(dwarf2out_frame_debug_cfa_window_save): Add FAKE parameter.
If FAKE is false, set window_save of the current row.
(dwarf2out_frame_debug) <REG_CFA_TOGGLE_RA_MANGLE>: Call above
function with FAKE parameter set to true.
<REG_CFA_WINDOW_SAVE>: Likewise but with FAKE parameter set to false.
(change_cfi_row): Emit a DW_CFA_GNU_window_save if necessary.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2cfi.c
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Subject: [Bug rtl-optimization/88390] [9 regression] g++.dg/tree-prof/pr57451.C FAILs
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--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Thanks for reporting the problem.
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Subject: [Bug c++/87861] [9 regression] ICE in output_constructor_regular_field, at varasm.c:5165
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--- Comment #10 from Andreas Schwab <schwab@linux-m68k.org> ---
http://gcc.gnu.org/ml/gcc-testresults/2018-12/msg00950.html
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Subject: [Bug fortran/88304] [9 Regression] ICE in use_pointer_in_frame, at tree-nested.c:267
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--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 8 13:37:49 2018
New Revision: 266907
URL: https://gcc.gnu.org/viewcvs?rev=266907&root=gcc&view=rev
Log:
PR fortran/88304
* tree-nested.c (convert_local_reference_stmt): Handle clobbers where
lhs is not a decl normally, don't call use_pointer_in_frame on that
lhs.
* gfortran.fortran-torture/compile/pr88304-2.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.fortran-torture/compile/pr88304-2.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-nested.c
>From gcc-bugs-return-625212-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 08 13:56:24 2018
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Subject: [Bug c++/86228] ordered comparison between pointer and zero
Date: Sat, 08 Dec 2018 13:56:00 -0000
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eracpp <eracpp at eml dot cc> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from eracpp <eracpp at eml dot cc> ---
This bug was observed in the following example:
https://gcc.godbolt.org/z/p1VreP
#include <algorithm>
#include <array>
int main()
{
std::array<int, 3> arr;
// Mistake: meant to use std::generate.
std::generate_n(arr.begin(), arr.end(), []{ return 0; });
}
This code successfully compiles (unexpectedly) with GCC due to `size > 0` being
treated as well-formed in the case where the type of second parameter `size` is
deduced to be a pointer type such as `int*`. The contrary behavior is observed
with Clang, as seen in the provided Compiler Explorer link above.
The mistake manifests as an unexpected segmentation fault at runtime, rather
thana compile-time error:
http://coliru.stacked-crooked.com/a/2dc4ae877233c9b2
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/88411] [9 Regression] Random crashes for ASYNCHRONOUS writes (bad locking?)
Date: Sat, 08 Dec 2018 14:32:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tkoenig at gcc dot gnu.org
--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Here is some debugging info. Does not happen every time:
$ gfortran a.f90 -pthread
$ valgrind --tool=drd ./a.out
==4274== drd, a thread error detector
==4274== Copyright (C) 2006-2017, and GNU GPL'd, by Bart Van Assche.
==4274== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==4274== Command: ./a.out
==4274==
==4274== Thread 3:
==4274== Conflicting load by thread 3 at 0x05fe2268 size 4
==4274== at 0x5075A80: buf_flush (unix.c:533)
==4274== by 0x5072D62: sflush (unix.h:89)
==4274== by 0x5072D62: _gfortrani_data_transfer_init_worker
(transfer.c:3176)
==4274== by 0x507D213: async_io (async.c:135)
==4274== by 0x4C30CC3: vgDrd_thread_wrapper (drd_pthread_intercepts.c:444)
==4274== by 0x5A22723: start_thread (in /lib64/libpthread-2.22.so)
==4274== by 0x5D23E8C: clone (in /lib64/libc-2.22.so)
==4274== Address 0x5fe2268 is at offset 56 from 0x5fe2230. Allocation context:
==4274== at 0x4C2F830: calloc (vg_replace_malloc.c:711)
==4274== by 0x4E69BB2: _gfortrani_xcalloc (memory.c:83)
==4274== by 0x5075790: fd_to_stream (unix.c:1096)
==4274== by 0x5076501: _gfortrani_open_external (unix.c:1572)
==4274== by 0x506C0AA: _gfortrani_new_unit (open.c:535)
==4274== by 0x506C9F5: already_open (open.c:711)
==4274== by 0x506C9F5: _gfortran_st_open (open.c:888)
==4274== by 0x400F82: MAIN__ (in /home/ig25/Krempel/A2/a.out)
==4274== by 0x401302: main (in /home/ig25/Krempel/A2/a.out)
==4274== Other segment start (thread 1)
==4274== at 0x4C34AB8: pthread_mutex_unlock_intercept
(drd_pthread_intercepts.c:978)
==4274== by 0x4C34AB8: pthread_mutex_unlock (drd_pthread_intercepts.c:991)
==4274== by 0x507351E: data_transfer_init (transfer.c:3147)
==4274== by 0x400FC4: MAIN__ (in /home/ig25/Krempel/A2/a.out)
==4274== by 0x401302: main (in /home/ig25/Krempel/A2/a.out)
==4274== Other segment end (thread 1)
==4274== at 0x5A29DCD: ??? (in /lib64/libpthread-2.22.so)
==4274== by 0x507598A: raw_write (unix.c:366)
==4274== by 0x5075AB9: buf_flush (unix.c:540)
==4274== by 0x5075AB9: buf_flush (unix.c:526)
==4274== by 0x5075BCD: buf_write (unix.c:653)
==4274== by 0x5075BCD: buf_write (unix.c:626)
==4274== by 0x506F186: swrite (unix.h:59)
==4274== by 0x506F186: write_buf (transfer.c:865)
==4274== by 0x506F280: unformatted_write (transfer.c:1150)
==4274== by 0x506FC09: _gfortrani_transfer_array_inner (transfer.c:2486)
==4274== by 0x506FCCA: _gfortran_transfer_array (transfer.c:2535)
==4274== by 0x401079: MAIN__ (in /home/ig25/Krempel/A2/a.out)
==4274== by 0x401302: main (in /home/ig25/Krempel/A2/a.out)
==4274==
=
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/88411] [9 Regression] Random crashes for ASYNCHRONOUS writes (bad locking?)
Date: Sat, 08 Dec 2018 16:01:00 -0000
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
The problem appears to be that the record length is set to zero
a file with the same unit number is opened again.
Hmm... some more digging is needed.
>From gcc-bugs-return-625215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 08 16:28:01 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/88411] [9 Regression] Random crashes for ASYNCHRONOUS writes (bad locking?)
Date: Sat, 08 Dec 2018 16:28:00 -0000
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--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Hm, maybe something else.
It seems we're actually writing direct access files in the
main thread, even when using asynchronous I/O.
Hmm...
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From: "m.diehl at mpie dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88412] Associate segmentation fault assigning to derived type
Date: Sat, 08 Dec 2018 16:45:00 -0000
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Martin Diehl <m.diehl at mpie dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Martin Diehl <m.diehl at mpie dot de> ---
Looks like a duplicate to me too.
*** This bug has been marked as a duplicate of bug 87937 ***
>From gcc-bugs-return-625217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 08 16:45:59 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87937] [8 Regression] LHS reallocation broken inside "select type" and "associate"
Date: Sat, 08 Dec 2018 16:45:00 -0000
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Martin Diehl <m.diehl at mpie dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |m.diehl at mpie dot de
--- Comment #15 from Martin Diehl <m.diehl at mpie dot de> ---
*** Bug 88412 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-625218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 08 17:46:52 2018
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From: "safinaskar at mail dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
Date: Sat, 08 Dec 2018 17:46:00 -0000
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Askar Safin <safinaskar at mail dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #7 from Askar Safin <safinaskar at mail dot ru> ---
"g++ -fstrict-enums" doesn't disable warning if I use "enum class" instead of
plain enum.
This is test code:
///
enum class Enum {
A,
B,
};
int CoverMyBases(Enum x) {
switch (x) {
case Enum::A:
return 1;
case Enum::B:
return 0;
}
}
int main(int argc, const char **argv) {
CoverMyBases(Enum::A);
CoverMyBases(Enum::B);
return 0;
}
///
This is command line:
g++ -fstrict-enums a.cpp
This is gcc version: gcc version 8.2.0 (Debian 8.2.0-10)
And I get this:
a.cpp: In function ‘int CoverMyBases(Enum)’:
a.cpp:13:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
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Subject: [Bug fortran/88357] ICE in parse_associate, at fortran/parse.c:4568
Date: Sat, 08 Dec 2018 18:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88357
--- Comment #8 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Dec 8 18:09:05 2018
New Revision: 266908
URL: https://gcc.gnu.org/viewcvs?rev=266908&root=gcc&view=rev
Log:
2018-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88357
* class.c (insert_component_ref): Check for NULL pointer and
previous error message issued.
* parse.c (parse_associate): Check for NULL pointer.
* resolve.c (resolve_assoc_var): Check for NULL pointer.
2018-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
* gfortran.dg/pr88357_1.f90: New test.
* gfortran.dg/pr88357_2.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr88357_1.f90
trunk/gcc/testsuite/gfortran.dg/pr88357_2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/class.c
trunk/gcc/fortran/parse.c
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88357] ICE in parse_associate, at fortran/parse.c:4568
Date: Sat, 08 Dec 2018 18:12:00 -0000
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #10 from kargl at gcc dot gnu.org ---
Closing.
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Subject: [Bug fortran/88357] ICE in parse_associate, at fortran/parse.c:4568
Date: Sat, 08 Dec 2018 18:12:00 -0000
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kargl at gcc dot gnu.org changed:
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--- Comment #9 from kargl at gcc dot gnu.org ---
Fixes for z1.f90 and z3.f90 have been committed.
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
Date: Sat, 08 Dec 2018 20:27:00 -0000
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--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Askar Safin from comment #7)
> "g++ -fstrict-enums" doesn't disable warning if I use "enum class" instead
> of plain enum.
Yes because they have different semantics ...
>From gcc-bugs-return-625224-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 08 22:14:32 2018
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Subject: [Bug fortran/88364] [9 Regression] Wrong-code due to CLOBBER
Date: Sat, 08 Dec 2018 22:14:00 -0000
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Bug 88364 depends on bug 88304, which changed state.
Bug 88304 Summary: [9 Regression] ICE in use_pointer_in_frame, at tree-nested.c:267
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88304
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----------------------------------------------------------------------------
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Subject: [Bug fortran/88304] [9 Regression] ICE in use_pointer_in_frame, at tree-nested.c:267
Date: Sat, 08 Dec 2018 22:14:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-625225-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 08 23:17:42 2018
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From: "lts-rudolph at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88417] New: partial specialization of static template variable inside class template gives wrong result
Date: Sat, 08 Dec 2018 23:17:00 -0000
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Bug ID: 88417
Summary: partial specialization of static template variable
inside class template gives wrong result
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Reporter: lts-rudolph at gmx dot de
Target Milestone: ---
If I do a partial template variable specialization inside a template class I
got the wrong results and/or if no unspecialised version is provided I got a
linker error.
template < typename T>
class X
{
public:
T i;
X(T _i): i{_i}{}
operator T(){ return i; }
};
template < typename T2 >
class Y
{
public:
template <typename T>
static X<T> x_in_y;
};
template< typename T2>
template< typename T>
X<T> Y<T2>::x_in_y{200};
template<>
template<>
X<float> Y<int>::x_in_y<float>{100};
template<>
template<>
X<int> Y<int>::x_in_y<int>{101};
// this partial specialization is never seen, but compiles without error
template< >
template< typename T >
X<T> Y<bool>::x_in_y{77};
int main()
{
std::cout << Y<int>::x_in_y<int> << std::endl;
std::cout << Y<int>::x_in_y<float> << std::endl;
std::cout << Y<float>::x_in_y<float> << std::endl;
std::cout << Y<bool>::x_in_y<float> << std::endl;
}
expected result:
101
100
200
77
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From: "safinaskar at mail dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
Date: Sat, 08 Dec 2018 23:27:00 -0000
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--- Comment #9 from Askar Safin <safinaskar at mail dot ru> ---
(In reply to Andrew Pinski from comment #8)
> Yes because they have different semantics ...
So, you mean that "enum class" is less strict than normal enums? This is very
strange.
Today I normally use "enum class", because they are advertised as "better". And
now I see that, well, they are *less* strict, than normal enums, and thus (to
get better compiler warnings) I need to switch to "old bad" enums, right?! This
is very-very strange. So if I want good compiler messages I need to convert my
code from "good modern" enum class to "bad old" enums, right?! Is there some
hack to get better compiler warnings for "enum class"? Something like
-fstrict-enums, but for "enum class"?
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Subject: [Bug fortran/88025] [7/8/9 Regression] ICE in gfc_apply_init, at fortran/expr.c:4468
Date: Sun, 09 Dec 2018 01:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88025
--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 9 01:02:41 2018
New Revision: 266913
URL: https://gcc.gnu.org/viewcvs?rev=266913&root=gcc&view=rev
Log:
2018-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88025
* expr.c (gfc_apply_init): Remove asserts that cannot trigger.
Check for a NULL pointer.
2018-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88025
* gfortran.dg/pr88025.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr88025.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88025] [7/8/9 Regression] ICE in gfc_apply_init, at fortran/expr.c:4468
Date: Sun, 09 Dec 2018 03:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88025
--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 9 03:10:41 2018
New Revision: 266914
URL: https://gcc.gnu.org/viewcvs?rev=266914&root=gcc&view=rev
Log:
2018-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88025
* expr.c (gfc_apply_init): Remove asserts that cannot trigger.
Check for a NULL pointer.
2018-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88025
* gfortran.dg/pr88025.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88025.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/expr.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88025] [7/8/9 Regression] ICE in gfc_apply_init, at fortran/expr.c:4468
Date: Sun, 09 Dec 2018 03:16:00 -0000
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #5 from kargl at gcc dot gnu.org ---
Closing. Fixed on trunk and branch-8. Patch does not
apply to branch-7.
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Subject: [Bug fortran/87945] [9 Regression] ICE in var_element, at fortran/decl.c:281
Date: Sun, 09 Dec 2018 04:03:00 -0000
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--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 9 04:02:44 2018
New Revision: 266915
URL: https://gcc.gnu.org/viewcvs?rev=266915&root=gcc&view=rev
Log:
20180-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/87945
* decl.c (var_element): Inquiry parameters cannit be data objects.
20180-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/87945
* gfortran.dg/pr87945_1.f90: New test.
* gfortran.dg/pr87945_2.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr87945_1.f90
trunk/gcc/testsuite/gfortran.dg/pr87945_2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87945] [9 Regression] ICE in var_element, at fortran/decl.c:281
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |kargl at gcc dot gnu.org
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Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
--- Comment #5 from kargl at gcc dot gnu.org ---
Fixed on trunk. Closing
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Subject: [Bug target/88418] New: [7/8/9 Regression] ICE in extract_insn, at recog.c:2305 (error: unrecognizable insn)
Date: Sun, 09 Dec 2018 04:40:00 -0000
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Bug ID: 88418
Summary: [7/8/9 Regression] ICE in extract_insn, at
recog.c:2305 (error: unrecognizable insn)
Product: gcc
Version: 7.0
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Target: x86_64-unknown-linux-gnu
gcc-9.0.0-alpha20181202 snapshot (r266729) ICE when compiling the following
snippet at any optimization level except -Og and w/ -msse4.1 -fpack-struct:
typedef long int __attribute__ ((__vector_size__ (2 * sizeof (long int))))
v2si;
union df {
v2si se[2];
};
void
qg (union df *jz, union df *pl)
{
jz->se[0] = jz->se[0] == pl->se[0];
}
% x86_64-unknown-linux-gnu-gcc-9.0.0-alpha20181202 -msse4.1 -O1 -fpack-struct
-c eysik9hz.c
eysik9hz.c: In function 'qg':
eysik9hz.c:11:1: error: unrecognizable insn:
11 | }
| ^
(insn 8 7 9 2 (set (reg:V2DI 89)
(eq:V2DI (reg:V2DI 87)
(mem/j:V2DI (reg/v/f:DI 86 [ pl ]) [1 *pl_6(D)+0 S16 A8])))
"eysik9hz.c":10:25 -1
(nil))
during RTL pass: vregs
eysik9hz.c:11:1: internal compiler error: in extract_insn, at recog.c:2305
0x668df7 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/rtl-error.c:108
0x668e13 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/rtl-error.c:116
0x666f6d extract_insn(rtx_insn*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/recog.c:2305
0xa3d813 instantiate_virtual_regs_in_insn
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/function.c:1650
0xa3d813 instantiate_virtual_regs
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/function.c:2020
0xa3d813 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/function.c:2069
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Subject: [Bug target/58067] ICE in GFortran recog.c:2158
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Arseny Solokha <asolokha at gmx dot com> changed:
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----------------------------------------------------------------------------
CC| |asolokha at gmx dot com
--- Comment #12 from Arseny Solokha <asolokha at gmx dot com> ---
At least the C testcase in comment 8 was fixed for 4.9 and subsequent releases.
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Subject: [Bug target/46250] ICE: in extract_insn, at recog.c:2110 (unrecognizable insn) with -fPIC -mcmodel=large and __thread variable
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Arseny Solokha <asolokha at gmx dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Arseny Solokha <asolokha at gmx dot com> ---
It is likely a duplicate of PR58067 which was fixed for gcc 4.9.
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Subject: [Bug target/49670] internal compiler error: in extract_insn, at recog.c:2104
Date: Sun, 09 Dec 2018 04:41:00 -0000
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Arseny Solokha <asolokha at gmx dot com> changed:
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CC| |asolokha at gmx dot com
--- Comment #11 from Arseny Solokha <asolokha at gmx dot com> ---
I believe this is irrelevant by now.
>From gcc-bugs-return-625235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 04:41:53 2018
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Subject: [Bug target/82887] ICE: in extract_insn, at recog.c:2287 (unrecognizable insn) with _mm512_extracti64x4_epi64
Date: Sun, 09 Dec 2018 04:41:00 -0000
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Arseny Solokha <asolokha at gmx dot com> changed:
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--- Comment #3 from Arseny Solokha <asolokha at gmx dot com> ---
Since gcc 6 EOL the issue is fixed on all active branches and thus this PR can
be closed.
>From gcc-bugs-return-625237-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 04:46:30 2018
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Subject: [Bug target/49670] internal compiler error: in extract_insn, at recog.c:2104
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--- Comment #12 from Jeffrey Walton <noloader at gmail dot com> ---
(In reply to Arseny Solokha from comment #11)
> I believe this is irrelevant by now.
Yeah, no doubt. May as well close it.
>From gcc-bugs-return-625238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 04:52:49 2018
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Subject: [Bug target/49670] internal compiler error: in extract_insn, at recog.c:2104
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Jeffrey Walton <noloader at gmail dot com> changed:
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--- Comment #13 from Jeffrey Walton <noloader at gmail dot com> ---
Obsolete.
>From gcc-bugs-return-625239-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 05:56:18 2018
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Subject: [Bug c++/88419] New: [9 Regression] [ICE] "Same canonical type node for different types" for CTAD in noexcept
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Bug ID: 88419
Summary: [9 Regression] [ICE] "Same canonical type node for
different types" for CTAD in noexcept
Product: gcc
Version: 9.0
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Created attachment 45191
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45191&action=edit
Repro
This TU:
template<class> struct ref_view {
template<class T> ref_view(T&&);
};
template<class R> ref_view(R&) -> ref_view<R>;
struct ref_fn {
template<class R> auto operator()(R r) const
noexcept(noexcept(ref_view{r}));
};
template<class R> struct indirect_view {
indirect_view(R);
};
struct indirect_fn {
template<class R> auto operator()(R r) const
noexcept(noexcept(indirect_view{r}));
};
ICEs when compiled with "g++ -std=c++17 -c":
/home/casey/casey/Desktop/repro.cpp:18:40: internal compiler error: same
canonical type node for different types ‘indirect_view’ and ‘ref_view’
18 | noexcept(noexcept(indirect_view{r}));
| ^
0x9fd2af comptypes(tree_node*, tree_node*, int)
/home/casey/repos/gcc/gcc/cp/typeck.c:1486
0x9f3076 cp_tree_equal(tree_node*, tree_node*)
/home/casey/repos/gcc/gcc/cp/tree.c:3558
0x9f3d6f cp_tree_equal(tree_node*, tree_node*)
/home/casey/repos/gcc/gcc/cp/tree.c:3816
0x9e3772 cp_check_qualified_type
/home/casey/repos/gcc/gcc/cp/tree.c:2135
0x9e7557 build_cp_fntype_variant(tree_node*, cp_ref_qualifier, tree_node*,
bool)
/home/casey/repos/gcc/gcc/cp/tree.c:2568
0x9e7647 build_cp_fntype_variant(tree_node*, cp_ref_qualifier, tree_node*,
bool)
/home/casey/repos/gcc/gcc/cp/tree.c:2599
0x8b9aeb grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
/home/casey/repos/gcc/gcc/cp/decl.c:11527
0x8caa3e grokfield(cp_declarator const*, cp_decl_specifier_seq*, tree_node*,
bool, tree_node*, tree_node*)
/home/casey/repos/gcc/gcc/cp/decl2.c:814
0x95b2f1 cp_parser_init_declarator
/home/casey/repos/gcc/gcc/cp/parser.c:20306
0x95ef04 cp_parser_single_declaration
/home/casey/repos/gcc/gcc/cp/parser.c:27954
0x95f04c cp_parser_template_declaration_after_parameters
/home/casey/repos/gcc/gcc/cp/parser.c:27546
0x95f98d cp_parser_explicit_template_declaration
/home/casey/repos/gcc/gcc/cp/parser.c:27792
0x95f98d cp_parser_template_declaration_after_export
/home/casey/repos/gcc/gcc/cp/parser.c:27811
0x960cbd cp_parser_member_declaration
/home/casey/repos/gcc/gcc/cp/parser.c:24070
0x93b07a cp_parser_member_specification_opt
/home/casey/repos/gcc/gcc/cp/parser.c:23997
0x93b07a cp_parser_class_specifier_1
/home/casey/repos/gcc/gcc/cp/parser.c:23141
0x93d049 cp_parser_class_specifier
/home/casey/repos/gcc/gcc/cp/parser.c:23403
0x93d049 cp_parser_type_specifier
/home/casey/repos/gcc/gcc/cp/parser.c:17259
0x93e03b cp_parser_decl_specifier_seq
/home/casey/repos/gcc/gcc/cp/parser.c:13982
0x93e773 cp_parser_simple_declaration
/home/casey/repos/gcc/gcc/cp/parser.c:13287
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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Subject: [Bug fortran/88048] [8/9 Regression] ICE in check_data_variable, at fortran/resolve.c:15491
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--- Comment #5 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 9 06:09:47 2018
New Revision: 266916
URL: https://gcc.gnu.org/viewcvs?rev=266916&root=gcc&view=rev
Log:
2018-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88048
* resolve.c (check_data_variable): Named constant cannot be a
data object.
2018-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88048
* gfortran.dg/pr88048.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr88048.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88048] [8/9 Regression] ICE in check_data_variable, at fortran/resolve.c:15491
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--- Comment #6 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 9 06:29:17 2018
New Revision: 266917
URL: https://gcc.gnu.org/viewcvs?rev=266917&root=gcc&view=rev
Log:
2018-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88048
* resolve.c (check_data_variable): Named constant cannot be a
data object.
2018-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88048
* gfortran.dg/pr88048.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88048.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/resolve.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88048] [8/9 Regression] ICE in check_data_variable, at fortran/resolve.c:15491
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |kargl at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #7 from kargl at gcc dot gnu.org ---
Fixed on trunk and branch-8.
>From gcc-bugs-return-625243-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 07:35:04 2018
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From: "mcccs at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88035] missing _mm512_reduce_round_pd() et al
Date: Sun, 09 Dec 2018 07:35:00 -0000
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MCCCS <mcccs at gmx dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from MCCCS <mcccs at gmx dot com> ---
Only the `_mm_` reduce-intrinsics don't exist. You can still call them from GCC
by
1) Opening the table
https://github.com/llvm-mirror/clang/blob/master/lib/Headers/avx512dqintrin.h
2) Ctrl + F for the function (e.g. _mm512_reduce_round_pd)
3) Call the function in the definition (e.g. __builtin_ia32_reducepd512_mask)
But this is only a workaround, those `_mm_` functions/macros should be added, I
agree.
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/88420] New: Fortran OpenACC "Clause SEQ conflicts with INDEPENDENT"
Date: Sun, 09 Dec 2018 12:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88420
Bug ID: 88420
Summary: Fortran OpenACC "Clause SEQ conflicts with
INDEPENDENT"
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: openacc, patch
Severity: normal
Priority: P3
Component: fortran
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The Fortran front end declares that the OpenACC "Clause SEQ conflicts with
INDEPENDENT". While that combination doesn't make too much sense indeed, it's
still valid; these are orthogonal concepts.
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Subject: [Bug fortran/88420] Fortran OpenACC "Clause SEQ conflicts with INDEPENDENT"
Date: Sun, 09 Dec 2018 12:50:00 -0000
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--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Sun Dec 9 12:47:35 2018
New Revision: 266920
URL: https://gcc.gnu.org/viewcvs?rev=266920&root=gcc&view=rev
Log:
[PR88420] Fortran OpenACC "Clause SEQ conflicts with INDEPENDENT"
The Fortran front end declares that the OpenACC "Clause SEQ conflicts with
INDEPENDENT". While that combination doesn't make too much sense indeed, it's
still valid; these are orthogonal concepts.
gcc/fortran/
PR fortran/88420
* openmp.c (resolve_oacc_loop_blocks): Remove "Clause SEQ
conflicts with INDEPENDENT" diagnostic.
gcc/testsuite/
PR fortran/88420
* gfortran.dg/goacc/loop-1-2.f95: Update.
* gfortran.dg/goacc/loop-1.f95: Likewise.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/openmp.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/goacc/loop-1-2.f95
trunk/gcc/testsuite/gfortran.dg/goacc/loop-1.f95
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Subject: [Bug inline-asm/52813] %rsp in clobber list is silently ignored
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Dimitar Dimitrov <dinuxbg at gmail dot com> changed:
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--- Comment #7 from Dimitar Dimitrov <dinuxbg at gmail dot com> ---
Suggested fix has been posted for review:
https://gcc.gnu.org/ml/gcc-patches/2018-12/msg00532.html
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/88411] [9 Regression] Random crashes for ASYNCHRONOUS writes (bad locking?)
Date: Sun, 09 Dec 2018 13:16:00 -0000
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--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Something glaringly obvious just struck me: The test case
has synchronous writes for a file which is opened asynchronously.
This may or may not have been intended. It is certainly a bug
not to get this right, but at least there is a workaround:
Rewrite the test case as
program gfcbug153
implicit none
integer :: iu, irecl
real :: a(100,20), b(1,3000)
iu = 10
a = 0.
b = 0.
inquire (iolength = irecl) a
open (iu, file="file1.dat", access='direct', &
asynchronous='yes', &
recl=irecl)
write(iu, rec=1,asynchronous="yes") a(:,:)
write(iu, rec=2,asynchronous="yes") a(:,:)
write(iu, rec=3,asynchronous="yes") a(:,:)
close (iu)
inquire (iolength = irecl) b
open (iu, file="file2.dat", access='direct', &
asynchronous='yes', &
recl=irecl)
write(iu, rec=1,asynchronous="yes") b(:,:)
write(iu, rec=2,asynchronous="yes") b(:,:)
write(iu, rec=3,asynchronous="yes") b(:,:)
close (iu)
end program
That appears to work, at least according to the
testing that I did.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/88411] [9 Regression] Random crashes for ASYNCHRONOUS writes (bad locking?)
Date: Sun, 09 Dec 2018 13:49:00 -0000
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--- Comment #7 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
This looks like it could do the trick:
Index: io/transfer.c
===================================================================
--- io/transfer.c (Revision 266250)
+++ io/transfer.c (Arbeitskopie)
@@ -3189,7 +3189,7 @@ data_transfer_init (st_parameter_dt *dtp, int read
}
}
- if (au)
+ if (au && dtp->u.p.async)
{
NOTE ("enqueue_data_transfer");
enqueue_data_transfer_init (au, dtp, read_flag);
@@ -4401,7 +4401,7 @@ st_write_done (st_parameter_dt *dtp)
{
if (dtp->u.p.current_unit)
{
- if (dtp->u.p.current_unit->au)
+ if (dtp->u.p.current_unit->au && dtp->u.p.async)
{
if (dtp->common.flags & IOPARM_DT_HAS_ID)
*dtp->id = enqueue_done_id (dtp->u.p.current_unit->au,
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Subject: [Bug libstdc++/88421] New: compat C headers break building GCC with GCC
Date: Sun, 09 Dec 2018 14:09:00 -0000
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Bug ID: 88421
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I built GCC #1 (x86_64->sh3)
Now I'm trying to build GCC #2 (sh3->sh3) using GCC #1
during the build process,
libtool: compile: shle--netbsdelf-c++ --sysroot=/home/fly/sh3/destdir.evbsh3/
-I/current/gcc/libstdc++-v3/../libgcc
-I/tmp/build/shle--netbsdelf/libstdc++-v3/include/shle--netbsdelf
-I/tmp/build/shle--netbsdelf/libstdc++-v3/include
-I/current/gcc/libstdc++-v3/libsupc++ -std=gnu++98 -D_GLIBCXX_SHARED
-fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2
-fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=c++locale.lo -g -O2 -fimplicit-templates -c c++locale.cc -fPIC
-DPIC -D_GLIBCXX_SHARED -o c++locale.o
mv -f .deps/list_read.Tpo .deps/list_read.Plo
In file included from
/home/fly/sh3/destdir.evbsh3/usr/include/evbsh3/ieeefp.h:3,
from /home/fly/sh3/destdir.evbsh3/usr/include/ieeefp.h:12,
from c++locale.cc:40:
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h: In function 'fp_except
__FPE(int)':
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:62:13: error:
'FE_DIVBYZERO' was not declared in this scope
62 | if (__fe & FE_DIVBYZERO)
| ^~~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:64:13: error:
'FE_INEXACT' was not declared in this scope
64 | if (__fe & FE_INEXACT)
| ^~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:66:13: error:
'FE_INVALID' was not declared in this scope; did you mean 'EINVAL'?
66 | if (__fe & FE_INVALID)
| ^~~~~~~~~~
| EINVAL
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:68:13: error:
'FE_OVERFLOW' was not declared in this scope; did you mean 'EOVERFLOW'?
68 | if (__fe & FE_OVERFLOW)
| ^~~~~~~~~~~
| EOVERFLOW
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:70:13: error:
'FE_UNDERFLOW' was not declared in this scope; did you mean 'UNDERFLOW'?
70 | if (__fe & FE_UNDERFLOW)
| ^~~~~~~~~~~~
| UNDERFLOW
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h: In function 'int
__FEE(fp_except)':
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:81:11: error:
'FE_DIVBYZERO' was not declared in this scope
81 | __fe |= FE_DIVBYZERO;
| ^~~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:83:11: error:
'FE_INEXACT' was not declared in this scope
83 | __fe |= FE_INEXACT;
| ^~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:85:11: error:
'FE_INVALID' was not declared in this scope; did you mean 'EINVAL'?
85 | __fe |= FE_INVALID;
| ^~~~~~~~~~
| EINVAL
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:87:11: error:
'FE_OVERFLOW' was not declared in this scope; did you mean 'EOVERFLOW'?
87 | __fe |= FE_OVERFLOW;
| ^~~~~~~~~~~
| EOVERFLOW
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:89:11: error:
'FE_UNDERFLOW' was not declared in this scope; did you mean 'UNDERFLOW'?
89 | __fe |= FE_UNDERFLOW;
| ^~~~~~~~~~~~
| UNDERFLOW
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h: In function 'fp_rnd
__FPR(int)':
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:98:7: error:
'FE_TONEAREST' was not declared in this scope
98 | case FE_TONEAREST:
| ^~~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:100:7: error:
'FE_DOWNWARD' was not declared in this scope
100 | case FE_DOWNWARD:
| ^~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:102:7: error: 'FE_UPWARD'
was not declared in this scope
102 | case FE_UPWARD:
| ^~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:104:7: error:
'FE_TOWARDZERO' was not declared in this scope
104 | case FE_TOWARDZERO:
| ^~~~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h: In function 'int
__FER(fp_rnd)':
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:117:10: error:
'FE_TONEAREST' was not declared in this scope
117 | return FE_TONEAREST;
| ^~~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:119:10: error:
'FE_DOWNWARD' was not declared in this scope
119 | return FE_DOWNWARD;
| ^~~~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:121:10: error:
'FE_UPWARD' was not declared in this scope
121 | return FE_UPWARD;
| ^~~~~~~~~
/home/fly/sh3/destdir.evbsh3/usr/include/sh3/ieeefp.h:123:10: error:
'FE_TOWARDZERO' was not declared in this scope
123 | return FE_TOWARDZERO;
| ^~~~~~~~~~~~~
if everything was working well, this would be the chain of includes.
ieeefp.h
#include fenv.h ->
libstdc++ #2 fenv.h
#include_next fenv.h ->
libstdc++ #1 fenv.h
#include_next fenv.h ->
system
fenv.h
But instead, we get:
ieeefp.h
#include fenv.h ->
libstdc++ #2 fenv.h
#include_next fenv.h ->
libstdc++ #1 fenv.h
nothing
(because it shares include guards
with libstdc++ #2)
so system fenv.h is never reached.
>From gcc-bugs-return-625250-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 14:10:22 2018
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Subject: [Bug libstdc++/88421] compat C headers break building GCC with GCC
Date: Sun, 09 Dec 2018 14:10:00 -0000
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--- Comment #1 from coypu <coypu at sdf dot org> ---
suggested change: put #include_next outside of include guards?
>From gcc-bugs-return-625251-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 14:57:03 2018
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Subject: [Bug debug/26475] tree-ssa loses line numbers for initializations (constants for PHIs)
Date: Sun, 09 Dec 2018 14:57:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amacleod at redhat dot com,
| |rguenth at gcc dot gnu.org
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #6)
> (In reply to Andrew Macleod from comment #5)
> > I just checked in the code to track locations through PHI arguments.
> >
> > Comments and patch is located:
> > http://gcc.gnu.org/ml/gcc-patches/2009-07/msg01729.html
>
> Thread said it was checked it as r150267 apparently?
Andrew, can this be closed?
>From gcc-bugs-return-625252-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 15:43:04 2018
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From: "nidal.faour at wdc dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88422] New: collect2.exe: fatal error: lto-wrapper returned 1 exit status: file not recognized: file truncated
Date: Sun, 09 Dec 2018 15:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88422
Bug ID: 88422
Summary: collect2.exe: fatal error: lto-wrapper returned 1 exit
status: file not recognized: file truncated
Product: gcc
Version: lto
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: nidal.faour at wdc dot com
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Created attachment 45192
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45192&action=edit
test case to reproduce the the failure
When attempt to build a simple code including one assembly file and one c code
file while calling a c function from the assembly code and using the lto in
linkage stage I encountered an error in the lto-wrapper where ld returned 1
exit status, with file not recognized: file truncated.
the build has been done in windows machine.
the toolchain used: gcc-arm-8.2-2018.08-i686-mingw32-arm-eabi
download link:
https://developer.arm.com/-/media/Files/downloads/gnu-a/8.2-2018.08/gcc-arm-8.2-2018.08-i686-mingw32-arm-eabi.tar.xz?revision=37b1357c-06a5-4721-8fde-533b0028c083&la=en
gcc build info:
Using built-in specs.
COLLECT_GCC=..\gcc-arm-8.2\bin\arm-eabi-gcc.exe
COLLECT_LTO_WRAPPER=c:/tmp/gcc-arm-8.2/bin/../libexec/gcc/arm-eabi/8.2.1/lto-wrapper.exe
Target: arm-eabi
Configured with:
/tmp/dgboter/bbs/dsggnu-vm-1-x86_64--mingw32-i686/buildbot/mingw32-i686--arm-eabi/build/src/gcc/configure
--target=arm-eabi
--prefix=/tmp/dgboter/bbs/dsggnu-vm-1-x86_64--mingw32-i686/buildbot/mingw32-i686--arm-eabi/build/build-mingw-arm-eabi/install//
--with-gmp=/tmp/dgboter/bbs/dsggnu-vm-1-x86_64--mingw32-i686/buildbot/mingw32-i686--arm-eabi/build/build-mingw-arm-eabi/host-tools
--with-mpfr=/tmp/dgboter/bbs/dsggnu-vm-1-x86_64--mingw32-i686/buildbot/mingw32-i686--arm-eabi/build/build-mingw-arm-eabi/host-tools
--with-mpc=/tmp/dgboter/bbs/dsggnu-vm-1-x86_64--mingw32-i686/buildbot/mingw32-i686--arm-eabi/build/build-mingw-arm-eabi/host-tools
--with-isl=/tmp/dgboter/bbs/dsggnu-vm-1-x86_64--mingw32-i686/buildbot/mingw32-i686--arm-eabi/build/build-mingw-arm-eabi/host-tools
--with-pkgversion='GNU Toolchain for the A-profile Architecture 8.2-2018-08
(arm-rel-8.23)' --disable-shared --disable-nls --disable-threads --disable-tls
--enable-checking=release --enable-languages=c,c++,fortran --with-newlib
--with-multilib-list=aprofile
--with-libiconv-prefix=/tmp/dgboter/bbs/dsggnu-vm-1-x86_64--mingw32-i686/buildbot/mingw32-i686--arm-eabi/build/build-mingw-arm-eabi/host-tools
--host=i686-w64-mingw32
Thread model: single
gcc version 8.2.1 20180802 (GNU Toolchain for the A-profile Architecture
8.2-2018-08 (arm-rel-8.23))
Attached a simple test case [lto_test_arm.zip] that reproduce the failure.
>From gcc-bugs-return-625253-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 15:57:52 2018
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Subject: [Bug rtl-optimization/88423] New: [9 Regression] ICE in begin_move_insn, at sched-ebb.c:175
Date: Sun, 09 Dec 2018 15:57:00 -0000
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Bug ID: 88423
Summary: [9 Regression] ICE in begin_move_insn, at
sched-ebb.c:175
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Target: x86_64-unknown-linux-gnu
gcc-9.0.0-alpha20181202 snapshot (r266729) ICEs when compiling
gcc/testsuite/gcc.dg/20030309-1.c w/ -march=skylake -Os -fPIC
-fsched2-use-superblocks -fno-if-conversion:
% x86_64-unknown-linux-gnu-gcc-9.0.0-alpha20181202 -march=skylake -Os -fPIC
-fsched2-use-superblocks -fno-if-conversion -c
gcc/testsuite/gcc.dg/20030309-1.c
during RTL pass: sched2
gcc/testsuite/gcc.dg/20030309-1.c: In function 'main':
gcc/testsuite/gcc.dg/20030309-1.c:42:1: internal compiler error: in
begin_move_insn, at sched-ebb.c:175
42 | }
| ^
0x777edb begin_move_insn
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/sched-ebb.c:175
0x777edb begin_move_insn
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/sched-ebb.c:145
0x1538e1c commit_schedule
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/haifa-sched.c:6228
0x1544015 schedule_block(basic_block_def**, void*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/haifa-sched.c:7065
0x15c94ff schedule_ebb(rtx_insn*, rtx_insn*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/sched-ebb.c:537
0x15c9b1f schedule_ebbs()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/sched-ebb.c:657
0xcb2ab4 rest_of_handle_sched2
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/sched-rgn.c:3738
0xcb2ab4 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/sched-rgn.c:3876
>From gcc-bugs-return-625254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 16:10:18 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87370] [7/8/9 Regression] Inefficient return code of struct values
Date: Sun, 09 Dec 2018 16:10:00 -0000
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--- Comment #10 from trashyankes at wp dot pl ---
(In reply to H.J. Lu from comment #9)
> Fixed for GCC 9, GCC 8.3 and GCC 7.4.
One question, I look on test case and see:
```
f1():
xor eax, eax
xor edx, edx
ret
f2():
push rbp
xor eax, eax
xor edx, edx
mov rbp, rsp
and rsp, -64
sub rsp, 8
leave
ret
f3():
xor eax, eax
xor edx, edx
ret
```
Why `f2` have `push` there? Isn't this co kind of stack alignment? but for what
point is it there? Clang do not have that.
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Subject: [Bug target/87370] [7/8/9 Regression] Inefficient return code of struct values
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87370
--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to trashyankes from comment #10)
> (In reply to H.J. Lu from comment #9)
> > Fixed for GCC 9, GCC 8.3 and GCC 7.4.
>
> One question, I look on test case and see:
>
> ```
> f1():
> xor eax, eax
> xor edx, edx
> ret
> f2():
> push rbp
> xor eax, eax
> xor edx, edx
> mov rbp, rsp
> and rsp, -64
> sub rsp, 8
> leave
> ret
> f3():
> xor eax, eax
> xor edx, edx
> ret
> ```
>
> Why `f2` have `push` there? Isn't this co kind of stack alignment? but for
> what point is it there? Clang do not have that.
Which GCC are you using? GCC 8.2 generates:
.file "pr87370.c"
.text
.p2align 4,,15
.globl f1
.type f1, @function
f1:
.LFB0:
.cfi_startproc
xorl %eax, %eax
xorl %edx, %edx
ret
.cfi_endproc
.LFE0:
.size f1, .-f1
.p2align 4,,15
.globl f2
.type f2, @function
f2:
.LFB1:
.cfi_startproc
xorl %eax, %eax
xorl %edx, %edx
ret
.cfi_endproc
.LFE1:
.size f2, .-f2
.p2align 4,,15
.globl f3
.type f3, @function
f3:
.LFB2:
.cfi_startproc
xorl %eax, %eax
xorl %edx, %edx
ret
.cfi_endproc
.LFE2:
.size f3, .-f3
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Subject: [Bug lto/88422] collect2.exe: fatal error: lto-wrapper returned 1 exit status: file not recognized: file truncated
Date: Sun, 09 Dec 2018 16:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88422
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
Component|c |lto
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I bet someone forgot to open a file as binary. I also suspect this has been
fixed already.
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Subject: [Bug fortran/88228] ICE in check_null, at fortran/expr.c:2691
Date: Sun, 09 Dec 2018 16:33:00 -0000
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--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 9 16:32:48 2018
New Revision: 266926
URL: https://gcc.gnu.org/viewcvs?rev=266926&root=gcc&view=rev
Log:
2018-12-09 Fritz Reese <fritzoreese@gmail.com>
PR fortran/88228
* resolve.c (resolve_operator): Do not call resolve_function.
Break like other cases.
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88228
* gfortran.dg/pr88228.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr88228.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Fixed in upstream, and committed in r266925.
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Subject: [Bug c/67729] -Wformat should warn for %Ns where the buffer size is known to be less than N in size
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--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
Three years later, enhancement not implemented.
See
https://sourceware.org/bugzilla/show_bug.cgi?id=23490
for an example where glibc would have benefited from this enhancement.
If someone can give me a clue which source code file / function
to look at, then I'd be happy to have a look myself.
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Subject: [Bug fortran/88228] ICE in check_null, at fortran/expr.c:2691
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--- Comment #5 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 9 17:09:15 2018
New Revision: 266927
URL: https://gcc.gnu.org/viewcvs?rev=266927&root=gcc&view=rev
Log:
2018-12-09 Fritz Reese <fritzoreese@gmail.com>
PR fortran/88228
* resolve.c (resolve_operator): Do not call resolve_function.
Break like other cases.
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88228
* gfortran.dg/pr88228.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88228.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/resolve.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/88419] [9 Regression] [ICE] "Same canonical type node for different types" for CTAD in noexcept
Date: Sun, 09 Dec 2018 17:29:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-09
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Likely started with r241944.
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Subject: [Bug c++/88419] [9 Regression] [ICE] "Same canonical type node for different types" for CTAD in noexcept
Date: Sun, 09 Dec 2018 17:30:00 -0000
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
But not sure if it's a regression: 7/8/9 ICEs whereas
$ xg++-6 -c 88419.C -std=c++17
88419.C:5:48: error: expected constructor, destructor, or type conversion
before ‘;’ token
template<class R> ref_view(R&) -> ref_view<R>;
^
88419.C:9:33: error: missing template arguments before ‘{’ token
noexcept(noexcept(ref_view{r}));
^
88419.C:9:33: error: expected ‘)’ before ‘{’ token
88419.C:9:33: error: expected ‘)’ before ‘{’ token
88419.C:9:36: error: expected unqualified-id before ‘)’ token
noexcept(noexcept(ref_view{r}));
^
88419.C: In member function ‘auto ref_fn::operator()(R) const’:
88419.C:9:35: error: expected ‘;’ before ‘}’ token
noexcept(noexcept(ref_view{r}));
^
88419.C: At global scope:
88419.C:18:38: error: missing template arguments before ‘{’ token
noexcept(noexcept(indirect_view{r}));
^
88419.C:18:38: error: expected ‘)’ before ‘{’ token
88419.C:18:38: error: expected ‘)’ before ‘{’ token
88419.C:18:41: error: expected unqualified-id before ‘)’ token
noexcept(noexcept(indirect_view{r}));
^
88419.C: In member function ‘auto indirect_fn::operator()(R) const’:
88419.C:18:40: error: expected ‘;’ before ‘}’ token
noexcept(noexcept(indirect_view{r}));
^
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--- Comment #8 from Geert linders <geert.linders at hotmail dot com> ---
(In reply to Andrew Pinski from comment #2)
> 4.9.x is no longer supported, can you try a newer version of GCC?
What is the oldest version of GCC that I can try?
>From gcc-bugs-return-625264-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 18:16:22 2018
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Subject: [Bug c/88424] New: Inserts newlines when preserving comments for a file using Windows newlines
Date: Sun, 09 Dec 2018 18:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88424
Bug ID: 88424
Summary: Inserts newlines when preserving comments for a file
using Windows newlines
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: reiter.christoph at gmail dot com
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gcc --version
gcc (Debian 8.2.0-11) 8.2.0
When preprocessing a file which uses Windows newlines without discarding
comments (The -C option) then gcc inserts an extra newline after each line in
comments:
* Write the following to test.c and make sure it uses Windows newlines
/**
* Foo-
* bar-
* quux
*/
int main() {
return 0;
}
* Execute "gcc -C -E test.c"
3) Expected (this is what clang produces):
[...]
/**
* Foo-
* bar-
* quux
*/
int main() {
return 0;
}
* Actual:
/**
* Foo-
* bar-
* quux
*/
# 6 "test.c"
int main() {
return 0;
}
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Subject: [Bug preprocessor/88424] Inserts newlines when preserving comments for a file using Windows newlines
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c |preprocessor
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Most likely \r is being treated as a new line just like \n. Remember \r by
itself is the new line endings on the classic mac os.
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Subject: [Bug preprocessor/88424] Inserts newlines when preserving comments for a file using Windows newlines
Date: Sun, 09 Dec 2018 18:27:00 -0000
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--- Comment #2 from Christoph Reiter <reiter.christoph at gmail dot com> ---
For context, we use gcc in gobject-introspection where we parse metadata from
the C comments and this breaks things when users on Windows have git set up to
auto convert line endings:
https://gitlab.gnome.org/GNOME/gobject-introspection/issues/243
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Subject: [Bug fortran/88228] ICE in check_null, at fortran/expr.c:2691
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--- Comment #6 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 9 18:32:01 2018
New Revision: 266928
URL: https://gcc.gnu.org/viewcvs?rev=266928&root=gcc&view=rev
Log:
2018-12-09 Fritz Reese <fritzoreese@gmail.com>
PR fortran/88228
* resolve.c (resolve_operator): Do not call resolve_function.
Break like other cases.
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88228
* gfortran.dg/pr88228.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr88228.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/resolve.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88228] ICE in check_null, at fortran/expr.c:2691
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #7 from kargl at gcc dot gnu.org ---
Fixed on trunk, branch-8, and branch-7.
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Subject: [Bug libfortran/88411] [9 Regression] Random crashes for ASYNCHRONOUS writes (bad locking?)
Date: Sun, 09 Dec 2018 18:55:00 -0000
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--- Comment #8 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sun Dec 9 18:54:47 2018
New Revision: 266929
URL: https://gcc.gnu.org/viewcvs?rev=266929&root=gcc&view=rev
Log:
2018-12-09 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/88411
* io/transfer.c (dta_transfer_init): Do not treat as an
asynchronous statement unless the statement has
ASYNCHRONOUS="YES".
(st_write_done): Likewise.
(st_read_done): Do not perform async_wait for synchronous I/O
on an async unit.
(st_read_done): Likewise.
2018-12-09 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/88411
* testsuite/libgomp.fortran/async_io_8.f90: New test.
Added:
trunk/libgomp/testsuite/libgomp.fortran/async_io_8.f90
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/transfer.c
trunk/libgomp/ChangeLog
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Subject: [Bug libfortran/88411] [9 Regression] Random crashes for ASYNCHRONOUS writes (bad locking?)
Date: Sun, 09 Dec 2018 18:57:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed on trunk, closing.
Thank you very much for the bug report - for this, finding a use
case that actually exposes a bug is really valuable.
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Subject: [Bug fortran/88206] [7/8/9 Regression] ICE in gfc_match_type_spec, at fortran/match.c:2229
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--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 9 19:10:57 2018
New Revision: 266930
URL: https://gcc.gnu.org/viewcvs?rev=266930&root=gcc&view=rev
Log:
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88206
* match.c (gfc_match_type_spec): REAL can be an intrinsic function.
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88206
* gfortran.dg/pr88206.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr88206.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/match.c
trunk/gcc/testsuite/ChangeLog
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88364] [9 Regression] Wrong-code due to CLOBBER
Date: Sun, 09 Dec 2018 19:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88364
--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
A simple fix is not to do the clobbers if there is a reference:
Index: trans-expr.c
===================================================================
--- trans-expr.c (Revision 266250)
+++ trans-expr.c (Arbeitskopie)
@@ -8152,7 +8152,7 @@ gfc_conv_expr_reference (gfc_se * se, gfc_expr * e
gfc_add_block_to_block (&se->pre, &se->post);
se->expr = var;
}
- else if (add_clobber)
+ else if (add_clobber && expr->ref == NULL)
{
tree clobber;
tree var;
A bit more sophisticated would be to actually build the correct
clobber in this case.
I'm inclined to commit the patch above and open a new PR for
the missed optimization, but I won't have time for either in
the next few days.
So, if anybody wants to do anything about this, be my guest :-)
>From gcc-bugs-return-625273-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 19:33:23 2018
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88425] New: suboptimal code for a<imm?-1:0
Date: Sun, 09 Dec 2018 19:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88425
Bug ID: 88425
Summary: suboptimal code for a<imm?-1:0
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: rtl-optimization
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Reporter: amonakov at gcc dot gnu.org
Target Milestone: ---
Target: x86_64-*-*, i?86-*-*
GCC does not manage to optimize (unsigned)a<b?-1:0 to a cmp-sbb sequence for
x86 when b is an immediate (RTL sees a <= (b-1) comparison instead).
unsigned long baz (unsigned int a)
{
return a < 123 ? -1ul : 0;
}
Optimal code would be
baz:
cmpl 123, %edi
sbbq %rax, %rax
ret
but we generate (at -O1, xor/cmp/setbe/neg at -O2+)
baz:
cmpl $122, %edi
setbe %al
movzbl %al, %eax
negq %rax
ret
In the common case the optimization is performed by combine:
unsigned long baz (unsigned int a, unsigned b)
{
return a < b ? -1ul : 0;
}
baz:
cmpl %esi, %edi
sbbq %rax, %rax
ret
>From gcc-bugs-return-625274-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 19:35:07 2018
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88402] inefficient code generation for mask from CC
Date: Sun, 09 Dec 2018 19:35:00 -0000
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--- Comment #4 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
(In reply to Alexander Monakov from comment #3)
> But unfortunately today we don't manage to use the cmp-sbb trick for
> unsigned comparison against an immediate, i.e. for
>
> unsigned long baz (unsigned int a)
> {
> return a < 123 ? -1ul : 0;
> }
It's probably more appropriate to discuss this aspect separately: PR 88425.
>From gcc-bugs-return-625275-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 19:52:36 2018
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Subject: [Bug fortran/88206] [7/8/9 Regression] ICE in gfc_match_type_spec, at fortran/match.c:2229
Date: Sun, 09 Dec 2018 19:52:00 -0000
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--- Comment #5 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 9 19:51:59 2018
New Revision: 266932
URL: https://gcc.gnu.org/viewcvs?rev=266932&root=gcc&view=rev
Log:
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88206
* match.c (gfc_match_type_spec): REAL can be an intrinsic function.
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88206
* gfortran.dg/pr88206.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88206.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/match.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug d/88039] gdc.test/compilable/ddoc12.d FAILs
Date: Sun, 09 Dec 2018 19:56:00 -0000
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--- Comment #8 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Sun Dec 9 19:55:54 2018
New Revision: 266933
URL: https://gcc.gnu.org/viewcvs?rev=266933&root=gcc&view=rev
Log:
Generate and scan documentation output in Ddoc tests.
The tests in gdc.test/compilable/ddoc*.d don't require the module to be
compiled all the way down to object code. Instead, only compile the
test sources with -fdoc, and scan the generated html content.
gcc/testsuite/ChangeLog:
PR d/88039
* gdc.test/gdc-test.exp (gdc-convert-args): Handle -D.
(dmd2dg): Check generated html in ddoc tests.
(gdc-do-test): Set dg-do-what-default to compile for ddoc tests.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gdc.test/gdc-test.exp
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88206] [7/8/9 Regression] ICE in gfc_match_type_spec, at fortran/match.c:2229
Date: Sun, 09 Dec 2018 20:23:00 -0000
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--- Comment #6 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 9 20:23:06 2018
New Revision: 266934
URL: https://gcc.gnu.org/viewcvs?rev=266934&root=gcc&view=rev
Log:
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88206
* match.c (gfc_match_type_spec): REAL can be an intrinsic function.
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88206
* gfortran.dg/pr88206.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr88206.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/match.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-625278-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 20:26:48 2018
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Subject: [Bug fortran/88206] [7/8/9 Regression] ICE in gfc_match_type_spec, at fortran/match.c:2229
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |kargl at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #7 from kargl at gcc dot gnu.org ---
Fixed on trunk, branch-8, and branch-7.
>From gcc-bugs-return-625279-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 09 20:47:53 2018
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From: "Casey at Carter dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88419] [9 Regression] [ICE] "Same canonical type node for different types" for CTAD in noexcept
Date: Sun, 09 Dec 2018 20:47:00 -0000
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--- Comment #3 from Casey Carter <Casey at Carter dot net> ---
8.2 and 7.4 don't ICE: https://godbolt.org/z/VznOao. I was assuming that
r266224 (the fix for #52869) likely caused the regression, although I haven't
investigated.
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Subject: [Bug fortran/88364] [9 Regression] Wrong-code due to CLOBBER
Date: Sun, 09 Dec 2018 21:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88364
--- Comment #5 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Thomas Koenig from comment #4)
> A simple fix is not to do the clobbers if there is a reference:
The fix in c#4 fixes the testcase in c#2 for me.
I'll give it a try.
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Subject: [Bug sanitizer/88426] New: Compiler crash if use special code with command line switch -fsanitize=float-cast-overflow
Date: Sun, 09 Dec 2018 21:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88426
Bug ID: 88426
Summary: Compiler crash if use special code with command line
switch -fsanitize=float-cast-overflow
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: akaras at inbox dot ru
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Created attachment 45193
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45193&action=edit
code sample
GCC crashing if try to compile attached code with command:
gcc -S -fsanitize=float-cast-overflow crash.c
Issue can be reproduced on gcc (GCC) 8.2.1 20181209
and debian unstable gcc-8 package.
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Subject: [Bug sanitizer/88426] Compiler crash if use special code with command line switch -fsanitize=float-cast-overflow
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--- Comment #1 from Andrei Karas <akaras at inbox dot ru> ---
Created attachment 45194
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45194&action=edit
crash log
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/88393] [7/8/9 Regression] [OOP] Segfault with type-bound assignment
Date: Sun, 09 Dec 2018 22:13:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-09
Ever confirmed|0 |1
Known to fail| |7.3.0, 8.2.0, 9.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The test compiled with r241883 + patches (2016-11-06) gives the expected
result, compiled with r241924 + patches (2016-11-07) gives a segfault at run
time.
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Subject: [Bug target/88418] [7/8/9 Regression] ICE in extract_insn, at recog.c:2305 (error: unrecognizable insn)
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-12-09
Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com
Ever confirmed|0 |1
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 45195
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Proposed patch
Patch in testing.
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Subject: [Bug target/88418] [7/8/9 Regression] ICE in extract_insn, at recog.c:2305 (error: unrecognizable insn)
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|x86_64-unknown-linux-gnu |x86
Target Milestone|--- |7.5
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From: "wilson at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/88422] collect2.exe: fatal error: lto-wrapper returned 1 exit status: file not recognized: file truncated
Date: Sun, 09 Dec 2018 23:13:00 -0000
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Jim Wilson <wilson at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |wilson at gcc dot gnu.org
--- Comment #2 from Jim Wilson <wilson at gcc dot gnu.org> ---
I've reproduced this problem with a RISC-V gcc-8.x compiler, and tracked it
down to the first patch for bug 81968, in comment #60. With the patch
reverted, the testcase works.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81968#c60
The RISC-V testcase works with Linux hosted and Cygwin hosted toolchains, and
only fails for mingw32 hosted toolchains. Maybe an LLP64 problem with the
patch? I didn't see any obvious type error in the patch though.
I had to borrow a windows machine from our IT group to look at this, and they
have since taken the loaner back, so I don't have a machine at work I can use
to debug this at present.
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/88205] ICE in gfc_wide_strncasecmp, at fortran/scanner.c:249
Date: Sun, 09 Dec 2018 23:49:00 -0000
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--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 9 23:49:14 2018
New Revision: 266936
URL: https://gcc.gnu.org/viewcvs?rev=266936&root=gcc&view=rev
Log:
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88205
* io.c (gfc_match_open): Move NEWUNIT checks to after STATUS checks.
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88205
* gfortran.dg/pr88205.f90: New unit.
Added:
trunk/gcc/testsuite/gfortran.dg/pr88205.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/io.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c/67729] -Wformat should warn for %Ns where the buffer size is known to be less than N in size
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org,
| |msebor at gcc dot gnu.org
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
Martin should probably know.
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Subject: [Bug c/67729] -Wformat should warn for %Ns where the buffer size is known to be less than N in size
Date: Mon, 10 Dec 2018 00:11:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=72783
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
This looks like a near dupe of bug 72783 (or vice versa), though not exactly
the same. That one asks for hardening which will be harder. Warning should be
a lot easier. The file where -Wformat-overflow is implemented for sprintf et
al. is gimple-ssa-sprintf.c. -Wformat alone is handled in c-family/c-format.c
but that's not a good place to do buffer overflow checking (it runs too early
to have knowledge of object sizes in all but the most trivial cases).
>From gcc-bugs-return-625290-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 00:32:39 2018
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Subject: [Bug middle-end/87118] ICE in expand_expr_addr_expr_1, at expr.c:7862
Date: Mon, 10 Dec 2018 00:32:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
This bug came up on the mailing lists here:
https://gcc.gnu.org/ml/gcc/2018-12/msg00057.html
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Subject: [Bug other/65794] Building crossback fails: No rule to make target `auto-build.h', needed by `build/genmddeps.o'
Date: Mon, 10 Dec 2018 00:36:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
Status|UNCONFIRMED |NEW
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2018-12/msg00525.ht
| |ml
Last reconfirmed| |2018-12-10
CC| |coypu at sdf dot org,
| |egallager at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
There's a patch for this (or at least something similar) on the gcc-patches
mailing list; taking it as confirmation:
https://gcc.gnu.org/ml/gcc-patches/2018-12/msg00525.html
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Subject: [Bug other/65794] Building crossback fails: No rule to make target `auto-build.h', needed by `build/genmddeps.o'
Date: Mon, 10 Dec 2018 00:47:00 -0000
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--- Comment #4 from coypu <coypu at sdf dot org> ---
Hi,
It's probably a setup/configuration issue for everyone reporting this issue.
It's hard to debug, my patch helps with figuring out the problem - but doesn't
fix it.
I didn't ping this bug report because I don't understand what the other patch
described here does.
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Subject: [Bug fortran/88205] ICE in gfc_wide_strncasecmp, at fortran/scanner.c:249
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--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Mon Dec 10 01:01:01 2018
New Revision: 266940
URL: https://gcc.gnu.org/viewcvs?rev=266940&root=gcc&view=rev
Log:
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88205
* io.c (gfc_match_open): Move NEWUNIT checks to after STATUS checks.
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88205
* gfortran.dg/pr88205.f90: New unit.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88205.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/io.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88205] ICE in gfc_wide_strncasecmp, at fortran/scanner.c:249
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--- Comment #5 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Mon Dec 10 01:25:47 2018
New Revision: 266941
URL: https://gcc.gnu.org/viewcvs?rev=266941&root=gcc&view=rev
Log:
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88205
* io.c (gfc_match_open): Move NEWUNIT checks to after STATUS checks.
2018-12-09 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88205
* gfortran.dg/pr88205.f90: New unit.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr88205.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/io.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88205] ICE in gfc_wide_strncasecmp, at fortran/scanner.c:249
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|NEW |RESOLVED
CC| |kargl at gcc dot gnu.org
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Target Milestone|--- |7.5
--- Comment #6 from kargl at gcc dot gnu.org ---
Fixed on trunk, branch-8, and branch-7. clsoing.
>From gcc-bugs-return-625296-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 01:43:03 2018
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/56069] [7 Regression] RA pessimization
Date: Mon, 10 Dec 2018 01:43:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 Regression] RA |[7 Regression] RA
|pessimization |pessimization
--- Comment #19 from Jeffrey A. Law <law at redhat dot com> ---
This was fixed way back in 2017:
commit a6e6a4df68e9e2cfbf4680b7f794254bc533d27c
Author: uros <uros@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon Aug 14 16:42:15 2017 +0000
PR target/46091
* config/i386/i386.md (*anddi_1_btr): New insn_and_split pattern.
(*iordi_1_bts): Ditto.
(*xordi_1_btc): Ditto.
testsuite/ChangeLog:
PR target/46091
* gcc.target/i386/pr46091-1.c: New test.
* gcc.target/i386/pr46091-2.c: Ditto.
* gcc.target/i386/pr46091-3.c: Ditto.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@251095
138bc75d-0d04-0410-961f-82ee72b054a4
:040000 040000 05739aaeccb137e9725a14cd94782096013169fa
53297b094d658372050f33eb62877dd228569169 M gcc
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88419] [9 Regression] [ICE] "Same canonical type node for different types" for CTAD in noexcept
Date: Mon, 10 Dec 2018 01:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88419
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
They do with checking enabled: try -fchecking=1.
>From gcc-bugs-return-625298-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 02:26:22 2018
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/88427] New: [9 Regression] ICE: tree check: expected integer_cst, have plus_expr in get_len, at tree.h:5617
Date: Mon, 10 Dec 2018 02:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88427
Bug ID: 88427
Summary: [9 Regression] ICE: tree check: expected integer_cst,
have plus_expr in get_len, at tree.h:5617
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
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gcc-9.0.0-alpha20181202 snapshot (r266729) ICEs when compiling the following
snippet w/ -O2 (-O3, -Ofast, -Os) -fno-tree-dce -fno-tree-fre:
void
uj (int eq, int s4)
{
short int tm = 0;
for (;;)
if (eq == s4)
{
tm += !!s4;
if (tm == s4)
{
eq += tm;
for (;;)
eq /= 0;
}
}
}
% gcc-9.0.0-alpha20181202 -O2 -fno-tree-dce -fno-tree-fre -w -c dr2mx6y0.c
during GIMPLE pass: vrp
dr2mx6y0.c: In function 'uj':
dr2mx6y0.c:2:1: internal compiler error: tree check: expected integer_cst, have
plus_expr in get_len, at tree.h:5617
2 | uj (int eq, int s4)
| ^~
0x6dd3f7 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/tree.c:9757
0x7db2b9 tree_check(tree_node const*, char const*, int, char const*, tree_code)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/tree.h:3410
0x7db2b9 wi::extended_tree<192>::get_len() const
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/tree.h:5617
0x7db2b9 wi::int_traits<generic_wide_int<wi::extended_tree<192> >
>::decompose(long*, unsigned int, generic_wide_int<wi::extended_tree<192> >
const&)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/wide-int.h:964
0x7db2b9 wide_int_ref_storage<true,
false>::wide_int_ref_storage<generic_wide_int<wi::extended_tree<192> >
>(generic_wide_int<wi::extended_tree<192> > const&, unsigned int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/wide-int.h:1013
0x7db2b9 generic_wide_int<wide_int_ref_storage<true, false>
>::generic_wide_int<generic_wide_int<wi::extended_tree<192> >
>(generic_wide_int<wi::extended_tree<192> > const&, unsigned int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/wide-int.h:788
0x7db2b9 bool wi::lts_p<generic_wide_int<wi::extended_tree<192> >,
generic_wide_int<wi::extended_tree<192> >
>(generic_wide_int<wi::extended_tree<192> > const&,
generic_wide_int<wi::extended_tree<192> > const&)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/wide-int.h:1879
0x7db2b9 wi::binary_traits<generic_wide_int<wi::extended_tree<192> >,
generic_wide_int<wi::extended_tree<192> >,
wi::int_traits<generic_wide_int<wi::extended_tree<192> > >::precision_type,
wi::int_traits<generic_wide_int<wi::extended_tree<192> >
>::precision_type>::signed_predicate_result operator<
<generic_wide_int<wi::extended_tree<192> >,
generic_wide_int<wi::extended_tree<192> >
>(generic_wide_int<wi::extended_tree<192> > const&,
generic_wide_int<wi::extended_tree<192> > const&)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/wide-int.h:3227
0x7db2b9 tree_int_cst_lt(tree_node const*, tree_node const*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/tree.h:5773
0xffcd56 vr_values::extract_range_from_phi_node(gphi*, value_range*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/vr-values.c:2870
0xf7e23b vrp_prop::extract_range_from_phi_node(gphi*, value_range*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/tree-vrp.c:4303
0xf7e23b vrp_prop::visit_phi(gphi*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/tree-vrp.c:6186
0xe92548 ssa_propagation_engine::simulate_stmt(gimple*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/tree-ssa-propagate.c:226
0xe93b1d ssa_propagation_engine::ssa_propagate()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/tree-ssa-propagate.c:813
0xf8f58a execute_vrp
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/tree-vrp.c:6718
>From gcc-bugs-return-625299-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 07:36:30 2018
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Subject: [Bug tree-optimization/88427] [9 Regression] ICE: tree check: expected integer_cst, have plus_expr in get_len, at tree.h:5617
Date: Mon, 10 Dec 2018 07:36:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-10
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r266557.
>From gcc-bugs-return-625300-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 07:55:42 2018
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Subject: [Bug tree-optimization/88427] [9 Regression] ICE: tree check: expected integer_cst, have plus_expr in get_len, at tree.h:5617
Date: Mon, 10 Dec 2018 07:55:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
We have:
(gdb) p debug (lhs_vr)
int [s4_11(D), s4_11(D) + 2]$3 = void
(gdb) p debug (vr_result)
int [s4_11(D), s4_11(D) + 32767]$4 = void
(gdb) p cmp_min
$5 = 0
(gdb) p cmp_max
$6 = -1
and the
/* If the new minimum is larger than the previous one
retain the old value. If the new minimum value is smaller
than the previous one and not -INF go all the way to -INF + 1.
In the first case, to avoid infinite bouncing between different
minimums, and in the other case to avoid iterating millions of
times to reach -INF. Going to -INF + 1 also lets the following
iteration compute whether there will be any overflow, at the
expense of one additional iteration. */
code isn't prepared for cmp_min > 0 or cmp_max < 0 to have vr_result->min () or
vr_result->max () of the form [-]sym + cst.
>From gcc-bugs-return-625301-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 08:21:24 2018
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Subject: [Bug sanitizer/88426] [8/9 Regression] Compiler crash if use special code with command line switch -fsanitize=float-cast-overflow
Date: Mon, 10 Dec 2018 08:21:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-10
Target Milestone|--- |8.3
Summary|Compiler crash if use |[8/9 Regression] Compiler
|special code with command |crash if use special code
|line switch |with command line switch
|-fsanitize=float-cast-overf |-fsanitize=float-cast-overf
|low |low
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r248139.
>From gcc-bugs-return-625302-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 08:26:44 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/88404] ICE (tree check) with -fsanitize=thread on Fortran2003 code
Date: Mon, 10 Dec 2018 08:26:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Summary|[9 Regression] ICE (tree |ICE (tree check) with
|check) with |-fsanitize=thread on
|-fsanitize=thread on |Fortran2003 code
|Fortran2003 code |
--- Comment #1 from janus at gcc dot gnu.org ---
Actually I think this is not a real regression. The reason why I saw it with
trunk but not with any released version is merely that it disappears when using
--enable-checking=release.
>From gcc-bugs-return-625303-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 08:31:11 2018
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Subject: [Bug demangler/87675] Stack Overflow in function next_is_type_qual() in cp-demangle.c, as demonstrated by "nm -C"
Date: Mon, 10 Dec 2018 08:31:00 -0000
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Tanaya Patil <tanaya_patil at persistent dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tanaya_patil at persistent dot com
--- Comment #7 from Tanaya Patil <tanaya_patil at persistent dot com> ---
Should we expect this fix to be in Binutil 2.32?
>From gcc-bugs-return-625304-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 08:35:59 2018
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Subject: [Bug fortran/88393] [7/8/9 Regression] [OOP] Segfault with type-bound assignment
Date: Mon, 10 Dec 2018 08:35:00 -0000
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--- Comment #2 from janus at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #1)
> The test compiled with r241883 + patches (2016-11-06) gives the expected
> result, compiled with r241924 + patches (2016-11-07) gives a segfault at run
> time.
Thanks for the information. Looking at this range of commits, I suspect that
r241885 is the culprit.
>From gcc-bugs-return-625305-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 08:43:09 2018
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Subject: [Bug sanitizer/88404] ICE (tree check) with -fsanitize=thread on Fortran2003 code
Date: Mon, 10 Dec 2018 08:43:00 -0000
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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> ---
> Actually I think this is not a real regression. The reason why I saw it
> with trunk but not with any released version is merely that it disappears
> when using --enable-checking=release.
Confirmed down to at least GCC6.
>From gcc-bugs-return-625306-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 08:46:50 2018
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Subject: [Bug sanitizer/88426] [8/9 Regression] Compiler crash if use special code with command line switch -fsanitize=float-cast-overflow
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45196
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45196&action=edit
gcc9-pr88426.patch
Untested fix. Sadly c_fully_fold doesn't handle CALL_EXPRs.
>From gcc-bugs-return-625307-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 08:51:45 2018
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Subject: [Bug tree-optimization/88405] Missed DSE opportunity
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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| |matz at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
But in general a prerequesite to eliminate Section A is
fusion of both loop nests and then CSEing the loads from a and b and finally
eliminate the stores as dead because a and b are only written to.
For the testcase we eliminate Section B because 'c' is discovered as writeonly.
But we do not update the writeonly flag of a or b when removing uses (and
IMHO we cannot easily). Note we perform this "DSE" in fixup_cfg.
>From gcc-bugs-return-625308-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 08:53:16 2018
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Subject: [Bug other/88409] [9 Regression] FAIL at line 4429, options --format=gnu-v3:
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>From gcc-bugs-return-625309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 08:55:43 2018
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Subject: [Bug target/88414] [9 Regression] ICE in lra_assign, at lra-assigns.c:1624
Date: Mon, 10 Dec 2018 08:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, m68k asms may contain m68k specific constraints that do not make sense on
x86.
>From gcc-bugs-return-625310-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 08:57:08 2018
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Subject: [Bug tree-optimization/88415] [7/8/9 Regression] ICE: verify_gimple failed (error: dead STMT in EH table)
Date: Mon, 10 Dec 2018 08:57:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Another complex lowering thing. Mine.
>From gcc-bugs-return-625311-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 08:58:37 2018
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Subject: [Bug rtl-optimization/88416] [8/9 Regression] ICE in in df_uses_record, at df-scan.c:3013
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>From gcc-bugs-return-625312-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 08:58:56 2018
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Subject: [Bug c++/88419] [9 Regression] [ICE] "Same canonical type node for different types" for CTAD in noexcept
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----------------------------------------------------------------------------
Target Milestone|--- |9.0
>From gcc-bugs-return-625313-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 09:07:03 2018
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Subject: [Bug rtl-optimization/88414] [9 Regression] ICE in lra_assign, at lra-assigns.c:1624
Date: Mon, 10 Dec 2018 09:07:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|target |rtl-optimization
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Not a target problem.
>From gcc-bugs-return-625314-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 09:08:59 2018
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Subject: [Bug lto/88422] collect2.exe: fatal error: lto-wrapper returned 1 exit status: file not recognized: file truncated
Date: Mon, 10 Dec 2018 09:08:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The question would be what (simple-object-common.h) the following resolves to:
/* Define ulong_type as an unsigned 64-bit type if available.
Otherwise just make it unsigned long. */
#ifdef UNSIGNED_64BIT_TYPE
__extension__ typedef UNSIGNED_64BIT_TYPE ulong_type;
#else
typedef unsigned long ulong_type;
#endif
it is tested by configure:
# Look for a 64-bit type.
AC_MSG_CHECKING([for a 64-bit type])
AC_CACHE_VAL(liberty_cv_uint64,
[AC_TRY_COMPILE(
[#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif],
[extern uint64_t foo;],
liberty_cv_uint64=uint64_t,
[AC_TRY_COMPILE(
[#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifndef CHAR_BIT
#define CHAR_BIT 8
#endif],
[extern char foo[sizeof(long) * CHAR_BIT >= 64 ? 1 : -1];],
liberty_cv_uint64="unsigned long",
[AC_TRY_COMPILE(
[#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifndef CHAR_BIT
#define CHAR_BIT 8
#endif],
[extern char foo[sizeof(long long) * CHAR_BIT >= 64 ? 1 : -1];],
liberty_cv_uint64="unsigned long long", liberty_cv_uint64=none)])])])
AC_MSG_RESULT($liberty_cv_uint64)
if test "$liberty_cv_uint64" != none; then
AC_DEFINE_UNQUOTED(UNSIGNED_64BIT_TYPE, $liberty_cv_uint64,
[Define to an unsigned 64-bit type available in the
compiler.])
fi
the fallback for using unsigned long should probably be #error instead.
Not sure if we actually need this given arm-eabi should be ELF32?
>From gcc-bugs-return-625315-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 09:10:42 2018
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Subject: [Bug tree-optimization/88427] [9 Regression] ICE: tree check: expected integer_cst, have plus_expr in get_len, at tree.h:5617
Date: Mon, 10 Dec 2018 09:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-625316-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 09:20:29 2018
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Subject: [Bug target/88035] missing _mm512_reduce_round_pd() et al
Date: Mon, 10 Dec 2018 09:20:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-10
CC| |hjl.tools at gmail dot com,
| |jakub at gcc dot gnu.org,
| |xguo at gcc dot gnu.org
Ever confirmed|0 |1
>From gcc-bugs-return-625317-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 09:21:24 2018
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Subject: [Bug fortran/88404] ICE (tree check) with -fsanitize=thread on Fortran2003 code
Date: Mon, 10 Dec 2018 09:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2018-12-10 00:00:00 |
Component|sanitizer |fortran
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The reason is we have
<component_ref 0x7ffff6a54c90
type <pointer_type 0x7ffff6a465e8
type <array_type 0x7ffff6a46540 type <integer_type 0x7ffff688f348
character(kind=1)>
...
arg:0 <mem_ref 0x7ffff6a57c08
type <void_type 0x7ffff688ff18 void VOID
align:8 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7ffff688ff18
pointer_to_this <pointer_type 0x7ffff6896000>>
...
arg:1 <field_decl 0x7ffff6a451c8 cs type <pointer_type 0x7ffff6a465e8>
unsigned DI t.f90:4:0 size <integer_cst 0x7ffff687ab70 64> unit-size
<integer_cst 0x7ffff687ab88 8>
align:64 warn_if_not_align:0 offset_align 128 offset <integer_cst
0x7fff
thus a COMPONENT_REF indexing void_type. This is created by the Fortran FE
here:
#3 0x00000000009c84ee in structure_alloc_comps (der_type=0x30bda80,
decl=<indirect_ref 0x7ffff6a56f80>, dest=<tree 0x0>, rank=0, purpose=1,
caf_mode=1)
at /space/rguenther/src/gcc-sccvn/gcc/fortran/trans-array.c:8578
8578 decl, cdecl, NULL_TREE);
(gdb) l
8573 case DEALLOCATE_ALLOC_COMP:
8574
8575 gfc_init_block (&tmpblock);
8576
8577 comp = fold_build3_loc (input_location, COMPONENT_REF, ctype,
8578 decl, cdecl, NULL_TREE);
8579
here 'decl' is
(gdb) p debug_tree (decl)
<indirect_ref 0x7ffff6a56f80
type <void_type 0x7ffff688ff18 void VOID
align:8 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7ffff688ff18
pointer_to_this <pointer_type 0x7ffff6896000>>
arg:0 <component_ref 0x7ffff6a54870
type <pointer_type 0x7ffff6896000 type <void_type 0x7ffff688ff18 void>
public unsigned DI
...
which is built by build_fold_indirect_ref_loc, dereferencing a generic
pointer:
#1 0x0000000000a0632f in gfc_conv_procedure_call (se=0x7fffffffd3f0,
sym=0x31258b0, args=0x30c50c0, expr=0x0, append_args=0x0)
at /space/rguenther/src/gcc-sccvn/gcc/fortran/trans-expr.c:5780
5780 tmp = build_fold_indirect_ref_loc (input_location,
tmp);
(gdb) l
5775 /* The derived type is passed to
gfc_deallocate_alloc_comp.
5776 Therefore, class actuals can handled correctly but
derived
5777 types passed to class formals need the _data
component. */
5778 tmp = gfc_class_data_get (tmp);
5779 if (!CLASS_DATA (fsym)->attr.dimension)
5780 tmp = build_fold_indirect_ref_loc (input_location,
tmp);
5781 }
>From gcc-bugs-return-625318-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 09:23:51 2018
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Subject: [Bug target/88035] missing _mm512_reduce_round_pd() et al
Date: Mon, 10 Dec 2018 09:23:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I must say I don't understand the #c1 comment, GCC
__builtin_ia32_reducepd512_mask etc. don't take the rounding mode argument at
all. And not only the _mm_*reduce_round* intrinsics are missing,
_mm512_*reduce_round* is missing too.
>From gcc-bugs-return-625319-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 09:49:56 2018
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/65725] Bootstrap errors on Solaris 10 x86-64, including object diffs
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--- Comment #5 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Mon Dec 10 09:49:02 2018
New Revision: 266946
URL: https://gcc.gnu.org/viewcvs?rev=266946&root=gcc&view=rev
Log:
Don't try to use libgcc-unwind.map with --disable-shared (PR bootstrap/65725)
2018-12-10 Fredrik Nyström <fredrik@lysator.liu.se>
PR bootstrap/65725
* config/sol2.h: Only use libgcc-unwind.map if
ENABLE_SHARED_LIBGCC.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sol2.h
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Subject: [Bug debug/26475] tree-ssa loses line numbers for initializations (constants for PHIs)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-625321-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 09:54:41 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88425] suboptimal code for a<imm?-1:0
Date: Mon, 10 Dec 2018 09:54:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org,
| |uros at gcc dot gnu.org
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is because the middle-end canonicalizes a < 123 comparison to a <= 122,
and for this exact optimization we need LTU rather than LEUm where the former
can be matched by the
*x86_movdicc_0_m1_neg pattern (or si if -m32).
So, in order to solve this, we'd need a define_insn_and_split (well, a set of
them) that would catch:
(parallel [
(set (reg:DI 86)
(neg:DI (leu:DI (reg:SI 89)
(const_int 122 [0x7a]))))
(clobber (reg:CC 17 flags))
])
in this case, with both SWI48 iterator (the mode of the result/neg/leu) and
SWI iterator (the mode of the comparison operands) and split that back into a
lt:CC comparison and the *x86_mov<mode>_0_m1_neg insn.
>From gcc-bugs-return-625322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 09:58:53 2018
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/65725] Bootstrap errors on Solaris 10 x86-64, including object diffs
Date: Mon, 10 Dec 2018 09:58:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Rainer Orth <ro at gcc dot gnu.org> ---
(In reply to Fredrik Nyström from comment #3)
> (In reply to Daniel Richard G. from comment #0)
> > 1. Missing libgcc-unwind.map file
>
> 1. Is caused by LINK_LIBGCC_MAPFILE_SPEC being set in gcc/config/sol2.h even
> if configured with --disable-shared. This has been around since PR
> target/59788.
>
> I've had success on solaris 10, both sparc and x86 with following fix.
>
> --- gcc/config/sol2.h.orig 2014-05-28 13:37:50.000000000 +0200
> +++ gcc/config/sol2.h 2015-09-03 14:23:19.950566000 +0200
> @@ -174,7 +174,7 @@
> #define RDYNAMIC_SPEC "--export-dynamic"
> #endif
>
> -#ifndef USE_GLD
> +#if !defined(USE_GLD) && defined(ENABLE_SHARED_LIBGCC)
> /* With Sun ld, use mapfile to enforce direct binding to libgcc_s unwinder.
> */
> #define LINK_LIBGCC_MAPFILE_SPEC \
> "%{shared|shared-libgcc:-M %slibgcc-unwind.map}"
Thanks for the patch. It makes perfect send and I've now installed it on
mainline.
> > 2. stage2 vs. stage3 diffs
>
> Are you sure you want /usr/ccs/bin/as on solaris x86?
> Have you tried with gnu as?
> --with-gnu-as
> --with-as=/usr/sfw/bin/gas
There's something to be said for using gas, but the Solaris 10 gas is ancient
by today' standards. That said, I regularly bootstrap gcc on Solaris 10 with
both as and gas, and both work for me.
When trying a mainline bootstrap, I've run into quite a number of issues
(libcc1 and ada not building), but once I've worked around those, I could
bootstrap on amd64-pc-solaris2.11 (admittedly) with as/ld without comparison
failures. This was without --with-pic, which I'll try next.
>From gcc-bugs-return-625323-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 10:10:30 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
Date: Mon, 10 Dec 2018 10:10:00 -0000
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
No.
They're not "less strict", but they have a fixed underlying type. For any
enumeration type with a fixed underlying type (whether "enum class" or just
"enum") the validvalues of the type are all the valid values of the underlying
type.
So:
enum E : unsigned char { e1, e2 };
enum class F : unsigned char { f1, f2 };
Both of these types can have any value from 0-255, so a switch statement that
only handles the e1/e2 or or f1/f2 is incorrect.
I wish people would just learn how enums work, it's not that complicated.
>From gcc-bugs-return-625324-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 10:16:46 2018
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Subject: [Bug c++/86228] ordered comparison between pointer and zero
Date: Mon, 10 Dec 2018 10:16:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to eracpp from comment #2)
> This bug was observed in the following example:
>
> https://gcc.godbolt.org/z/p1VreP
>
> #include <algorithm>
> #include <array>
>
> int main()
> {
> std::array<int, 3> arr;
>
> // Mistake: meant to use std::generate.
> std::generate_n(arr.begin(), arr.end(), []{ return 0; });
> }
>
> This code successfully compiles (unexpectedly) with GCC due to `size > 0`
> being treated as well-formed in the case where the type of second parameter
> `size` is deduced to be a pointer type such as `int*`.
That's PR 87982
>From gcc-bugs-return-625325-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 10:20:54 2018
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Subject: [Bug c++/88413] g++ mangles names involving unresolved names in function argument template parameters differently from the ABI standard.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
GCC has mangled it the same way since at least 4.3 (I don't have anything odler
to test).
FWIW EDG agrees with Clang.
>From gcc-bugs-return-625326-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 10:34:50 2018
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Subject: [Bug target/88425] suboptimal code for a<imm?-1:0
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45197
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45197&action=edit
gcc9-pr88425.patch
Untested fix.
>From gcc-bugs-return-625327-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 10:35:41 2018
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Subject: [Bug rtl-optimization/88416] [8/9 Regression] ICE in in df_uses_record, at df-scan.c:3013
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed; mine.
>From gcc-bugs-return-625328-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 10:41:50 2018
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Subject: [Bug c++/88413] g++ mangles names involving unresolved names in function argument template parameters differently from the ABI standard.
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The only case I see with "sr" in mangle.c is:
else
{
write_string ("sr");
write_type (scope);
write_member_name (member);
}
but the grammar has:
::= sr <unresolved-type> <base-unresolved-name> # T::x / decltype(p)::x
::= srN <unresolved-type> <unresolved-qualifier-level>+ E
<base-unresolved-name>
# T::N::x
/decltype(p)::N::x
::= [gs] sr <unresolved-qualifier-level>+ E <base-unresolved-name>
# A::x, N::y, A<T>::z; "gs"
means leading "::"
so it doesn't have E for some cases and has them for others. I wonder about
that srN, is that really literal srN string?
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Subject: [Bug rtl-optimization/88416] [8/9 Regression] ICE in in df_uses_record, at df-scan.c:3013
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
We started with
(insn 11 10 29 2 (set (reg:DI 85)
(mem:DI (post_inc:DI (reg/f:DI 7 sp)) [0 S8 A8]))
"/home/segher/tot/lib/gcc/x86_64-pc-linux-gnu/9.0.0/include/ia32intrin.h":262:10
52 {*popdi1}
(nil))
(debug_insn 29 11 12 2 (var_location:DI D#1 (reg:DI 85)) -1
(nil))
(insn 12 29 13 2 (set (reg:DI 83 [ _4 ])
(reg:DI 85))
"/home/segher/tot/lib/gcc/x86_64-pc-linux-gnu/9.0.0/include/ia32intrin.h":262:10
66 {*movdi_internal}
(expr_list:REG_DEAD (reg:DI 85)
(nil)))
and then we combined 11 into 12:
Trying 11 -> 12:
11: r85:DI=[sp:DI++]
12: r83:DI=r85:DI
REG_DEAD r85:DI
Successfully matched this instruction:
(set (reg:DI 83 [ _4 ])
(mem:DI (post_inc:DI (reg/f:DI 7 sp)) [0 S8 A8]))
allowing combination of insns 11 and 12
original costs 8 + 4 = 12
replacement cost 8
deferring rescan insn with uid = 29.
deferring deletion of insn with uid = 11.
modifying insn i3 12: r83:DI=[sp:DI++]
deferring rescan insn with uid = 12.
writing 29 as
(debug_insn 29 11 12 2 (var_location:DI D#1 (mem:DI (post_inc:DI (reg/f:DI 7
sp)
) [0 S8 A8])) -1
(nil))
and df_insn_refs_verify chokes on that for some reason. I dunno.
Unassigning.
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Subject: [Bug c++/88419] [7/8/9 Regression] [ICE] "Same canonical type node for different types" for CTAD in noexcept
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Target Milestone|9.0 |7.5
Summary|[9 Regression] [ICE] "Same |[7/8/9 Regression] [ICE]
|canonical type node for |"Same canonical type node
|different types" for CTAD |for different types" for
|in noexcept |CTAD in noexcept
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
If we've rejected it before and then started to ICE on it, it is a regression,
we should either keep rejecting it (if invalid) or accept it without ICE.
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Subject: [Bug libstdc++/88421] compat C headers break building GCC with GCC
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
What two fenv.h libstdc++ headers you mean (in what paths they are)? While
there is
include/tr1/fenv.h
include/c_compatibility/fenv.h
the former should be included only with <tr1/fenv.h>, not <fenv.h>.
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Subject: [Bug libstdc++/88421] compat C headers break building GCC with GCC
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--- Comment #3 from coypu <coypu at sdf dot org> ---
include/c_compatibility/fenv.h
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Subject: [Bug libstdc++/88421] compat C headers break building GCC with GCC
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is one header, not two, so why should that fenv.h's #include_next include
that same header or some copy of that header in a different path?
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Subject: [Bug libstdc++/88421] compat C headers break building GCC with GCC
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--- Comment #5 from coypu <coypu at sdf dot org> ---
(In reply to Jakub Jelinek from comment #4)
> That is one header, not two, so why should that fenv.h's #include_next
> include that same header or some copy of that header in a different path?
I am in the process of building libstdc++.
-I/tmp/build/shle--netbsdelf/libstdc++-v3/include
there's a libstdc++ fenv.h there
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Subject: [Bug rtl-optimization/88414] [9 Regression] ICE in lra_assign, at lra-assigns.c:1624
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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| |vmakarov at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r257077. In any case, it seems to be a LRA error-recovery bug.
We first properly diagnose that the inline asm has constraints that are
impossible to resolve ("=d" on two different variables). Vlad, do you think
you could have a look?
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to coypu from comment #1)
> suggested change: put #include_next outside of include guards?
We did something similar for PR 69581
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88428] New: Fails to consider lea -1(%rax), %rax compared to sub 1, %rax failing to CSE test
Date: Mon, 10 Dec 2018 12:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88428
Bug ID: 88428
Summary: Fails to consider lea -1(%rax), %rax compared to sub
1, %rax failing to CSE test
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
The following GIMPLE test shows non-optimal assembly
long mask;
void bar ();
__GIMPLE () void foo (int a, int b)
{
long _3;
_3 = a_1(D) < b_2(D) ? _Literal (long) -1l : 0l;
mask = _3;
if (a_1(D) < b_2(D))
goto bb1;
else
goto bb2;
bb1:
bar ();
bb2:
return;
}
foo:
.LFB0:
.cfi_startproc
xorl %eax, %eax
cmpl %esi, %edi
setge %al
subq $1, %rax
movq %rax, mask(%rip)
cmpl %esi, %edi
jl .L5
...
here subq clobbers flags and thus the cmpl has to be repeated. I believe
we could use lea which also has the same size
leaq -0x1(%rax), %rax
here instead and elide the redundant cmpl. For my purpose the store to
mask is unnecessary, it was placed to simplify the testcase. A GIMPLE
testcase was necessary to get the COND_EXPR and non-jumpy code through
optimization.
I'm not sure at which point during RTL we commit to using a CC clobbering
sub vs. a non-CC clobbering lea, but maybe cmpelim could replace one
with the other here?
>From gcc-bugs-return-625338-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 12:39:44 2018
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Subject: [Bug tree-optimization/88415] [7/8/9 Regression] ICE: verify_gimple failed (error: dead STMT in EH table)
Date: Mon, 10 Dec 2018 12:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88415
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Dec 10 12:39:07 2018
New Revision: 266951
URL: https://gcc.gnu.org/viewcvs?rev=266951&root=gcc&view=rev
Log:
2018-12-10 Richard Biener <rguenther@suse.de>
PR middle-end/88415
* gimple.c (gimple_assign_set_rhs_with_ops): Transfer EH
info to a newly allocated stmt.
* gcc.dg/gomp/pr88415.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/gomp/pr88415.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/88415] [7/8 Regression] ICE: verify_gimple failed (error: dead STMT in EH table)
Date: Mon, 10 Dec 2018 12:41:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[7/8/9 Regression] ICE: |[7/8 Regression] ICE:
|verify_gimple failed |verify_gimple failed
|(error: dead STMT in EH |(error: dead STMT in EH
|table) |table)
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/88369] [9 regression] g++.dg/vect/pr33426-ivdep.cc etc. FAIL
Date: Mon, 10 Dec 2018 12:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88369
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Dec 10 12:42:05 2018
New Revision: 266952
URL: https://gcc.gnu.org/viewcvs?rev=266952&root=gcc&view=rev
Log:
PR testsuite/88369
* gcc.dg/vect/vect-ivdep-1.c: Prune versioning for alignment messages.
* gcc.dg/vect/vect-ivdep-2.c: Likewise.
* gcc.dg/vect/nodump-vect-opt-info-1.c: Likewise.
* g++.dg/vect/pr33426-ivdep.cc: Likewise.
* g++.dg/vect/pr33426-ivdep-2.cc: Likewise.
* g++.dg/vect/pr33426-ivdep-3.cc: Likewise.
* g++.dg/vect/pr33426-ivdep-4.cc: Likewise.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/vect/pr33426-ivdep-2.cc
trunk/gcc/testsuite/g++.dg/vect/pr33426-ivdep-3.cc
trunk/gcc/testsuite/g++.dg/vect/pr33426-ivdep-4.cc
trunk/gcc/testsuite/g++.dg/vect/pr33426-ivdep.cc
trunk/gcc/testsuite/gcc.dg/vect/nodump-vect-opt-info-1.c
trunk/gcc/testsuite/gcc.dg/vect/vect-ivdep-1.c
trunk/gcc/testsuite/gcc.dg/vect/vect-ivdep-2.c
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/88429] New: Ada bootstrap fails with --disable-shared
Date: Mon, 10 Dec 2018 12:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88429
Bug ID: 88429
Summary: Ada bootstrap fails with --disable-shared
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Target: amd64-pc-solaris2.11, x86_64-pc-linux-gnu
Prompted by PR bootstrap/65725 (a Solaris bootstrap failure with
--disable-shared),
I tried both Solaris/amd64 and Linux/x86_64 bootstraps with --disable-shared:
both fail in the same way:
cp -p /vol/gcc/src/hg/trunk/local/gcc/tsystem.h rts_32
rm -f ../stamp-gnatlib-rts_32
touch ../stamp-gnatlib1-rts_32
rm -f rts_32/s-oscons-tmplt.i rts_32/s-oscons-tmplt.s
(cd rts_32 ; \
/var/gcc/regression/trunk/4.17.3-gcc-gas-gld/build/./gcc/xgcc
-B/var/gcc/regression/trunk/4.17.3-gcc-gas-gld/build/./gcc/
-B/vol/gcc/x86_64-pc-linux-gnu/bin/ -B/vol/gcc/x86_64-pc-linux-gnu/lib/
-isystem /vol/gcc/x86_64-pc-linux-gnu/include -isystem
/vol/gcc/x86_64-pc-linux-gnu/sys-include -fchecking=1 -W -Wall -g -O2 -g -O2
-fexceptions -DIN_RTS -DHAVE_GETIPINFO -m32 -E -C
-DTARGET=\"x86_64-pc-linux-gnu\" -iquote /vol/gcc/src/hg/trunk/local/gcc/ada
/vol/gcc/src/hg/trunk/local/gcc/ada/s-oscons-tmplt.c > s-oscons-tmplt.i ; \
/var/gcc/regression/trunk/4.17.3-gcc-gas-gld/build/./gcc/xgcc
-B/var/gcc/regression/trunk/4.17.3-gcc-gas-gld/build/./gcc/
-B/vol/gcc/x86_64-pc-linux-gnu/bin/ -B/vol/gcc/x86_64-pc-linux-gnu/lib/
-isystem /vol/gcc/x86_64-pc-linux-gnu/include -isystem
/vol/gcc/x86_64-pc-linux-gnu/sys-include -fchecking=1 -W -Wall -g -O2 -g -O2
-fexceptions -DIN_RTS -DHAVE_GETIPINFO -m32 -S s-oscons-tmplt.i ; \
../bldtools/oscons/xoscons s-oscons)
/bin/bash: line 0: cd: rts_32: Not a directory
Unlike the default (--enable-shared) case, it seems that the rts directory for
the non-default multilib is created incorrectly: with --enable-shared, I see
make THREAD_KIND=native setup-rts
make[9]: Entering directory
'/var/scratch/gcc/regression/trunk/4.17.3-gcc-gas-gld/build/gcc/ada'
rm -rf rts_32
mkdir -p rts_32
chmod u+w rts_32
while with --disable-shared, I get the creation of rts twice.
This may be related to libada/configure.ac referencing a gnatlib-plain
target for --disable-shared, which I couldn't find elsewhere.
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Subject: [Bug testsuite/88369] [9 regression] g++.dg/vect/pr33426-ivdep.cc etc. FAIL
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |jakub at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Hopefully fixed.
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Subject: [Bug ipa/88214] ICE in bitmap_intersect_p() on 32-bit BE platforms
Date: Mon, 10 Dec 2018 12:46:00 -0000
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--- Comment #8 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Mon Dec 10 12:45:47 2018
New Revision: 266953
URL: https://gcc.gnu.org/viewcvs?rev=266953&root=gcc&view=rev
Log:
[PR 88214] Check that an argument is a pointer
2018-12-10 Martin Jambor <mjambor@suse.cz>
PR ipa/88214
* ipa-prop.c (determine_locally_known_aggregate_parts): Make sure
we check pointers against pointers.
testsuite/
* gcc.dg/ipa/pr88214.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/ipa/pr88214.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-prop.c
trunk/gcc/testsuite/ChangeLog
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/66955] Bootstrap error: libcc1 compiled as shared library despite --disable-shared
Date: Mon, 10 Dec 2018 12:46:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|x86_64-unknown-linux-gnu |x86_64-unknown-linux-gnu,
| |i?86-pc-solaris2.11,
| |amd64-pc-solaris2.11
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-10
Component|libgcc |other
CC| |aoliva at gcc dot gnu.org,
| |ro at gcc dot gnu.org
Host|x86_64-unknown-linux-gnu |
Ever confirmed|0 |1
Build|x86_64-unknown-linux-gnu |
--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> ---
Confirmed on all of Linux/x86_64 and Solaris/x86. Recategorizing: libcc1 has
nothing to do with libgcc. There's no category for it and the MAINTAINERS file
lists none.
>From gcc-bugs-return-625345-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 12:49:25 2018
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Subject: [Bug go/56431] -lpthread should be added to -lgo
Date: Mon, 10 Dec 2018 12:49:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ro at gcc dot gnu.org
--- Comment #7 from Rainer Orth <ro at gcc dot gnu.org> ---
I'm seeing the same link error on Linux/x86_64 on mainline when configured with
--disable-shared:
/vol/gcc/bin/gld-2.31:
/var/gcc/regression/trunk/4.17.3-gcc-gas-gld/build/./gcc/libgcc.a(generic-morestack.o):
in function `__morestack_block_signals':
/vol/gcc/src/hg/trunk/local/libgcc/generic-morestack.c:661: undefined reference
to `pthread_sigmask'
linking e.g. test2json.
>From gcc-bugs-return-625346-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 12:53:31 2018
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Subject: [Bug ipa/88214] ICE in bitmap_intersect_p() on 32-bit BE platforms
Date: Mon, 10 Dec 2018 12:53:00 -0000
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-625347-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 13:03:25 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/65725] Bootstrap errors on Solaris 10 x86-64, including object diffs
Date: Mon, 10 Dec 2018 13:03:00 -0000
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--- Comment #7 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #6 from Rainer Orth <ro at gcc dot gnu.org> ---
[...]
>> > 2. stage2 vs. stage3 diffs
[...]
> When trying a mainline bootstrap, I've run into quite a number of issues
> (libcc1 and ada not building), but once I've worked around those, I could
> bootstrap on amd64-pc-solaris2.11 (admittedly) with as/ld without comparison
> failures. This was without --with-pic, which I'll try next.
That bootstrap (amd64-pc-solaris2.10 with as/ld, --disable-shared
--with-pic) has now completed as well: in addition to libcc1 (PR
other/66955) and ada (cf. PR ada/88429), I also had to disable go
because it uses sendfile without explicitly linking with -lsendfile (in
the shared case, this works because libgo is linked with libsendfile).
Anyway, the bootstrap has now finished successfully and make check is
running: no comparison failures at all. So unless there's additional
information how to reproduce this, I'll close the PR as WORKSFORME.
>From gcc-bugs-return-625348-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 13:11:17 2018
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Subject: [Bug testsuite/88290] [9 regression] 23_containers/deque/erasure.cc fails after r266672
Date: Mon, 10 Dec 2018 13:11:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Wasn't this already fixed in r266673 ?
>From gcc-bugs-return-625349-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 13:19:15 2018
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From: "jb at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/88430] New: -Wmissing-attributes warnings when including libquadmath headers
Date: Mon, 10 Dec 2018 13:19:00 -0000
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Bug ID: 88430
Summary: -Wmissing-attributes warnings when including
libquadmath headers
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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When building libgfortran trunk one nowadays (within the past month or two,
maybe?) gets lots of warnings like below:
In file included from ../../../../trunk/libgfortran/libgfortran.h:61,
from ../../../../trunk/libgfortran/ieee/ieee_helper.c:26:
../../../../trunk/libgfortran/../libquadmath/quadmath_weak.h:36:33: warning:
‘__qmath_crealq’ specifies less restrictive attribute than its target ‘crealq’:
‘nothrow’ [-Wmissing-attributes]
36 | #define __qmath3(name) __qmath2(__qmath_ ## name,name,name)
| ^~~~~~~~
../../../../trunk/libgfortran/../libquadmath/quadmath_weak.h:28:25: note: in
definition of macro ‘__qmath2’
28 | static __typeof(type) name __attribute__ ((__weakref__(#name2)));
| ^~~~
../../../../trunk/libgfortran/../libquadmath/quadmath_weak.h:113:1: note: in
expansion of macro ‘__qmath3’
113 | __qmath3 (crealq)
| ^~~~~~~~
According to 'git blame', there has been no recent changes to the quadmath
header files recently, thus I suspect the implementation of
-Wmissing-attributes is to blame.
Though since libquadmath lives in-tree, a feasible solution would be to fix the
quadmath headers, if the missing attribute warning otherwise works as intended?
Please reassign to libquadmath if so.
See thread starting at https://gcc.gnu.org/ml/fortran/2018-12/msg00055.html
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That would be the
gcc_checking_assert (TREE_TYPE (name) == t);
assert then. So, what is TREE_TYPE (name) and what is t when this happens?
>From gcc-bugs-return-625351-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 13:31:48 2018
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Subject: [Bug ipa/87955] [9 Regression] ICE in cl_target_option_print_diff at gcc/options-save.c:3803 since r265920
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Dec 10 13:30:49 2018
New Revision: 266954
URL: https://gcc.gnu.org/viewcvs?rev=266954&root=gcc&view=rev
Log:
PR ipa/87955
* gcc.target/i386/pr87955.c: Add -msse2 -mfpmath=sse to dg-options.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr87955.c
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/87955] [9 Regression] ICE in cl_target_option_print_diff at gcc/options-save.c:3803 since r265920
Date: Mon, 10 Dec 2018 13:33:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
CC| |jakub at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Should be fixed now.
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Subject: [Bug ipa/80726] [7/8/9 Regression] Destructor not inlined anymore (regression)
Date: Mon, 10 Dec 2018 13:41:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Honza, have you managed to look at this?
>From gcc-bugs-return-625354-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 13:49:05 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 sanitizer/85777] [7/8/9 Regression] -fsanitize=undefined makes a -Wmaybe-uninitialized warning disappear
Date: Mon, 10 Dec 2018 13:49:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The expectations that sanitization doesn't change generated warnings is a wrong
one, the runtime instrumentation affects the code generation so much that
necessarily some further warnings will be emitted and others omitted.
If you care about warnings as well as sanitization, I'd suggest separate builds
for warnings and for sanitization, the latter perhaps with -w.
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Subject: [Bug tree-optimization/85762] [8/9 Regression] range-v3 abstraction overhead not optimized away
Date: Mon, 10 Dec 2018 13:52:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Martin, could you please have a look?
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Subject: [Bug tree-optimization/88427] [9 Regression] ICE: tree check: expected integer_cst, have plus_expr in get_len, at tree.h:5617
Date: Mon, 10 Dec 2018 13:57:00 -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> ---
Fixed.
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Subject: [Bug tree-optimization/88427] [9 Regression] ICE: tree check: expected integer_cst, have plus_expr in get_len, at tree.h:5617
Date: Mon, 10 Dec 2018 13:57:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Dec 10 13:56:51 2018
New Revision: 266955
URL: https://gcc.gnu.org/viewcvs?rev=266955&root=gcc&view=rev
Log:
2018-12-10 Richard Biener <rguenther@suse.de>
PR tree-optimization/88427
* vr-values.c (vr_values::extract_range_from_phi_node):
Handle symbolic ranges conservatively when trying to drop
to Inf +- 1.
* gcc.dg/pr88427.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr88427.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/vr-values.c
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Subject: =?UTF-8?B?W0J1ZyBpcGEvODc5NTddIFs5IFJlZ3Jlc3Npb25dIElDRSB0cmVlIGNoZWNr?= =?UTF-8?B?OiBleHBlY3RlZCB0cmVlIHRoYXQgY29udGFpbnMg4oCYZGVjbCBtaW5pbWFs?= =?UTF-8?B?4oCZIHN0cnVjdHVyZSwgaGF2ZSDigJhpZGVudGlmaWVyX25vZGXigJkgaW4g?= =?UTF-8?B?d2Fybl9vZHIsIGF0IGlwYS1kZXZpcnQuYzoxMDUxIHNpbmNlIHIyNjU1MTk=?Date: Mon, 10 Dec 2018 14:02:00 -0000
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--- Comment #15 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> That would be the
> gcc_checking_assert (TREE_TYPE (name) == t);
> assert then. So, what is TREE_TYPE (name) and what is t when this happens?
Here's what I find (after recompiling tree.c with -g3 -O0):
(gdb) up
#1 0x09777f85 in fld_incomplete_type_of (t=0xfa58cc60, fld=0xfeffd6a8)
at /vol/gcc/src/hg/trunk/local/gcc/tree.c:5312
5312 gcc_checking_assert (TREE_TYPE (name) == t);
(gdb) p name
$1 = (tree) 0xfa593000
(gdb) call TREE_TYPE (name)
$2 = (tree) 0xfa58ccc0
(gdb) pt
warning: Expression is not an assignment (and might have no effect)
<record_type fa58ccc0
system__tasking__protected_objects__operations__communication_block
sizes-gimplified volatile visited type_2 BLK
size <integer_cst fa4058fc type <integer_type faefb0c0 bitsizetype>
constant 64>
unit-size <integer_cst fa405910 type <integer_type faefb060 sizetype>
constant 8>
align:32 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type fa58ccc0
fields <field_decl fa589e70 self
type <pointer_type fa5a3a20 system__tasking__task_id type <record_type
fa5a3960 system__tasking__ada_task_control_block>
static unsigned SI
size <integer_cst fa4058ac constant 32>
unit-size <integer_cst fa4058c0 constant 4>
align:32 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
fa542900>
side-effects volatile unsigned nonaddressable SI
/var/gcc/regression/trunk/11-gcc/build/i386-pc-solaris2.11/libada/adainclude/s-tpobop.ads:193:7
size <integer_cst fa4058ac 32> unit-size <integer_cst fa4058c0 4>
align:32 warn_if_not_align:0 offset_align 128
offset <integer_cst fa4058d4 constant 0>
bit-offset <integer_cst fa405924 constant 0> context <record_type
fa58cc60 system__tasking__protected_objects__operations__communication_block>
chain <field_decl fa589ec8 enqueued type <boolean_type fa41b480
boolean>
side-effects volatile unsigned nonaddressable QI
/var/gcc/regression/trunk/11-gcc/build/i386-pc-solaris2.11/libada/adainclude/s-tpobop.ads:194:7
size <integer_cst fa4059b0 constant 8>
unit-size <integer_cst fa4059c4 constant 1>
align:8 warn_if_not_align:0 offset_align 128 offset <integer_cst
fa4058d4 0> bit-offset <integer_cst fa4058ac 32> context <record_type fa58cc60
system__tasking__protected_objects__operations__communication_block> chain
<field_decl fa589f20 cancelled>>> context <translation_unit_decl fa40f558
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gnat.dg/lto8.adb>
Ada size <integer_cst fa558d98 type <integer_type faefb0c0 bitsizetype>
constant visited 48>
pointer_to_this <pointer_type fa58ce40> reference_to_this <reference_type
fa58cd20> chain <type_decl fa593000
system__tasking__protected_objects__operations__communication_block>>
(gdb) p t
$3 = (tree) 0xfa58cc60
(gdb) pt
warning: Expression is not an assignment (and might have no effect)
<record_type fa58cc60
system__tasking__protected_objects__operations__communication_block type_2 BLK
size <integer_cst fa4058fc type <integer_type faefb0c0 bitsizetype>
constant 64>
unit-size <integer_cst fa405910 type <integer_type faefb060 sizetype>
constant 8>
align:32 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type fa58cc60
fields <field_decl fa589e70 self
type <pointer_type fa5a3a20 system__tasking__task_id type <record_type
fa5a3960 system__tasking__ada_task_control_block>
static unsigned SI
size <integer_cst fa4058ac constant 32>
unit-size <integer_cst fa4058c0 constant 4>
align:32 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
fa542900>
side-effects volatile unsigned nonaddressable SI
/var/gcc/regression/trunk/11-gcc/build/i386-pc-solaris2.11/libada/adainclude/s-tpobop.ads:193:7
size <integer_cst fa4058ac 32> unit-size <integer_cst fa4058c0 4>
align:32 warn_if_not_align:0 offset_align 128
offset <integer_cst fa4058d4 constant 0>
bit-offset <integer_cst fa405924 constant 0> context <record_type
fa58cc60 system__tasking__protected_objects__operations__communication_block>
chain <field_decl fa589ec8 enqueued type <boolean_type fa41b480
boolean>
side-effects volatile unsigned nonaddressable QI
/var/gcc/regression/trunk/11-gcc/build/i386-pc-solaris2.11/libada/adainclude/s-tpobop.ads:194:7
size <integer_cst fa4059b0 constant 8>
unit-size <integer_cst fa4059c4 constant 1>
align:8 warn_if_not_align:0 offset_align 128 offset <integer_cst
fa4058d4 0> bit-offset <integer_cst fa4058ac 32> context <record_type fa58cc60
system__tasking__protected_objects__operations__communication_block> chain
<field_decl fa589f20 cancelled>>> context <translation_unit_decl fa40f558
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gnat.dg/lto8.adb>
Ada size <integer_cst fa558d98 type <integer_type faefb0c0 bitsizetype>
constant visited 48>
chain <type_decl fa589f78
system__tasking__protected_objects__operations__communication_block>>
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Subject: [Bug tree-optimization/85762] [8/9 Regression] range-v3 abstraction overhead not optimized away
Date: Mon, 10 Dec 2018 14:17:00 -0000
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |jamborm at gcc dot gnu.org
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--- Comment #3 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Sure.
>From gcc-bugs-return-625359-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 14:17:18 2018
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/88431] New: link errors on build
Date: Mon, 10 Dec 2018 14:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88431
Bug ID: 88431
Summary: link errors on build
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: d
Assignee: ibuclaw at gdcproject dot org
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For this configure line:
../trunk/configure --prefix=/home/dcb/gcc/results.266950 \
--disable-multilib \
--disable-werror \
--enable-checking=df,extra,fold,rtl,yes \
--enable-languages=c,c++,d,fortran
sed 's/-O2/-O3 -march=native -Wlogical-op/' < Makefile > Makefile.tmp
mv Makefile.tmp Makefile
I got:
/home/dcb/gcc/working/./gcc/xgcc -shared-libgcc -B/home/dcb/gcc/working/./gcc
-nostdinc++ -L/home/dcb/gcc/working/x86_64-pc-linux-gnu/libstdc++-v3/src
-L/home/dcb/gcc/working/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/home/dcb/gcc/working/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/home/dcb/gcc/results.266950/x86_64-pc-linux-gnu/bin/
-B/home/dcb/gcc/results.266950/x86_64-pc-linux-gnu/lib/ -isystem
/home/dcb/gcc/results.266950/x86_64-pc-linux-gnu/include -isystem
/home/dcb/gcc/results.266950/x86_64-pc-linux-gnu/sys-include -D_GNU_SOURCE
-D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-I. -I../../../../trunk/libsanitizer/lsan -I.. -I
../../../../trunk/libsanitizer/include -I ../../../../trunk/libsanitizer -Wall
-W -Wno-unused-parameter -Wwrite-strings -pedantic -Wno-long-long -fPIC
-fno-builtin -fno-exceptions -fno-rtti -fomit-frame-pointer -funwind-tables
-fvisibility=hidden -Wno-variadic-macros -I../../libstdc++-v3/include
-I../../libstdc++-v3/include/x86_64-pc-linux-gnu
-I../../../../trunk/libsanitizer/../libstdc++-v3/libsupc++ -std=gnu++11 -g -O3
-march=native -Wlogical-op -D_GNU_SOURCE -MT lsan_allocator.lo -MD -MP -MF
.deps/lsan_allocator.Tpo -c
../../../../trunk/libsanitizer/lsan/lsan_allocator.cc -fPIC -DPIC -o
.libs/lsan_allocator.o
/usr/bin/ld: core/.libs/atomic.o: relocation R_X86_64_32S against hidden symbol
`gdc.dso_slot' can not be used when making a shared object
/usr/bin/ld: core/.libs/attribute.o: relocation R_X86_64_32S against hidden
symbol `gdc.dso_slot' can not be used when making a shared object
/usr/bin/ld: core/.libs/bitop.o: relocation R_X86_64_32 against
`.rodata.str1.8' can not be used when making a shared object; recompile with
-fPIC
>From gcc-bugs-return-625361-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 15:07:23 2018
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Subject: [Bug c/88430] -Wmissing-attributes warnings when including libquadmath headers
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
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From: "alahay01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/88432] New: Dwarf line numbering inadequate when using -fstack-protector-strong
Date: Mon, 10 Dec 2018 15:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88432
Bug ID: 88432
Summary: Dwarf line numbering inadequate when using
-fstack-protector-strong
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
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Created attachment 45198
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45198&action=edit
Example breaking program
Using -fstack-protector-strong will cause GDB to break on the wrong line when
placing a breakpoint on a function.
[ Note that the GCC provided with Ubuntu will default to
-fstack-protector-strong, causing all function breakpoints to break on the
wrong line. This breaks roughly 50 GDB tests when run on x86 and AArch64 Ubuntu
]
The issue in GDB
=================
Consider the following program:
47: int main ()
48: {
49: char arg2 = 2;
50: signed char arg3 = 3;
(full program attached. Ignore everything in it except for main. Testcase taken
from the GDB testsuite.)
When compiled with -fstack-protector-strong, then running it in GDB,
“breakpoint main†will stop at line 48, the "{". This is wrong, it should
instead stop on line 49 – the first line of the function body.
GDB figures this out by looking at the dwarf line numbers. It finds the entry
for the start of the function (from other dwarf entries), and assumes that it
the entry for the function prologue. It then jumps forward one entry.
With stack proctector turned off we get the following. Note that the dwarf
label for main points at index 2.
INDEX LINE ADDRESS
0 45 0x0000000000400680
1 45 0x0000000000400680
2 48 0x0000000000400688 - main: prologue pt1
3 49 0x00000000004006ac - main: first line of function
4 50 0x00000000004006b4 - main: second line of function
...etc
With stack protector on (like Ubuntu):
INDEX LINE ADDRESS
0 45 0x0000000000400680
1 45 0x0000000000400680
2 48 0x0000000000400688 - main: prologue pt1
3 48 0x0000000000400698 - main: stack protector code
4 49 0x00000000004006ac - main: first line of function
5 50 0x00000000004006b4 - main: second line of function
...etc
Ok, we could jump forward two entries. But then breaks with the following (with
either stack protector on or off):
47: int main ()
48: { char arg2 = 2;
49: signed char arg3 = 3;
It will result in the same line table, with just two entries at line 48:
INDEX LINE ADDRESS
0 45 0x0000000000400680
1 45 0x0000000000400680
2 48 0x0000000000400688 - main: prologue pt1
3 48 0x0000000000400698 - main: stack protector code
4 49 0x00000000004006ac - main: second line of function
...etc
There is no way to tell if a repeated line is the first line of code or the
stack protector.
The underlying issue in GCC
===========================
See the attached rtl final dump from GCC (note: aarch64 code, but that doesn't
matter).
With the stack protector on, GCC produces RTL for the stack protector at the
beginning of the function, after the prologue.
You roughly get:
*function prologue rtl
*NOTE_INSN_PROLOGUE_END
*NOTE_INSN_FUNCTION_BEG
*stack guard code (__stack_chk_guard)
*rest of the function rtl
The stack guard rtl is given the line number of the "{" line.
When dumping line locations, notice_source_line() decides which RTL expressions
should cause a dump. It will force a dump of the first expression following
the end of the prologue - expecting this to be the first line of the function.
This gives us:
.LFB1:
.loc 1 48 0. – function prologue.
.cfi_startproc
sub sp, sp, #176
.cfi_def_cfa_offset 176
stp x29, x30, [sp, 32]
.cfi_offset 29, -144
.cfi_offset 30, -136
add x29, sp, 32
.cfi_def_cfa 29, 144
str x19, [sp, 48]
.cfi_offset 19, -128
.loc 1 48 0 -- Start of stack guard code
adrp x0, __stack_chk_guard
add x0, x0, :lo12:__stack_chk_guard
ldr x1, [x0]
str x1, [x29, 136]
mov x1,0
.loc 1 49 0. – first line of function
mov w0, 2
strb w0, [x29, 45]
.loc 1 50 0
mov w0, 3
strb w0, [x29, 46]
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Subject: [Bug debug/88432] Dwarf line numbering inadequate when using -fstack-protector-strong
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--- Comment #1 from alahay01 at gcc dot gnu.org ---
Created attachment 45199
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45199&action=edit
rtl final dump for the .cc file
>From gcc-bugs-return-625363-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 15:14:14 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug demangler/87675] Stack Overflow in function next_is_type_qual() in cp-demangle.c, as demonstrated by "nm -C"
Date: Mon, 10 Dec 2018 15:14:00 -0000
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--- Comment #8 from Nick Clifton <nickc at gcc dot gnu.org> ---
(In reply to Tanaya Patil from comment #7)
> Should we expect this fix to be in Binutil 2.32?
Yes. :-)
>From gcc-bugs-return-625365-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 15:15:04 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/88432] Dwarf line numbering inadequate when using -fstack-protector-strong
Date: Mon, 10 Dec 2018 15:15:00 -0000
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--- Comment #2 from alahay01 at gcc dot gnu.org ---
Created attachment 45200
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45200&action=edit
Final assembly dump for the .cc file with dwarf
>From gcc-bugs-return-625366-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 15:17:02 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88393] [7/8/9 Regression] [OOP] Segfault with type-bound assignment
Date: Mon, 10 Dec 2018 15:17:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vehre at gcc dot gnu.org
--- Comment #3 from janus at gcc dot gnu.org ---
(In reply to janus from comment #2)
> Looking at this range of commits, I suspect that r241885 is the culprit.
Using -fdump-tree-original to compare the dumps of versions 6 and 7 shows that
the assignment subroutine itself is identical in both, but the dump from v7
contains additional code after the call to 'ass' that is not present in v6.
With v6, the call is translated as follows:
{
struct __class_m_T_t class.7;
struct __class_m_T_t class.8;
class.7._vptr = (struct __vtype_m_T * {ref-all}) &__vtab_m_T;
class.7._data = &arr[1].c;
class.8._vptr = (struct __vtype_m_T * {ref-all}) &__vtab_m_T;
class.8._data = &arr[0].c;
ass (&class.7, &class.8);
}
With v7, it looks much bulkier:
{
struct __class_m_T_t class.7;
struct __class_m_T_t class.8;
struct t D.3602;
struct __class_m_T_t * D.3603;
struct __class_m_T_t D.3604;
void * restrict D.3605;
class.7._vptr = (struct __vtype_m_T * {ref-all}) &__vtab_m_T;
class.7._data = &arr[1].c;
class.8._vptr = (struct __vtype_m_T * {ref-all}) &__vtab_m_T;
D.3602 = arr[0].c;
class.8._data = &D.3602;
D.3603 = &class.8;
D.3604 = *D.3603;
ass (&class.7, D.3603);
D.3603->_cs_length = D.3604._cs_length;
if ((void *) D.3604.cs != 0B)
{
D.3605 = (void * restrict) __builtin_malloc (MAX_EXPR <(unsigned long)
D.3603->_cs_length, 1>);
D.3603->cs = (character(kind=1)[1:0] *) D.3605;
__builtin_memcpy (D.3603->cs, D.3604.cs, (unsigned long)
D.3603->_cs_length);
}
else
{
D.3603->cs = 0B;
}
if (D.3603->_data->cs != 0B)
{
__builtin_free ((void *) D.3603->_data->cs);
D.3603->_data->cs = 0B;
}
}
Looks like there is some copying and deallocation of the allocatable components
here. Not sure why that would be necessary ...?!?
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From: "alahay01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/88432] Dwarf line numbering inadequate when using -fstack-protector-strong
Date: Mon, 10 Dec 2018 15:21:00 -0000
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--- Comment #3 from alahay01 at gcc dot gnu.org ---
I considered a number of solutions, but they all had issues:
1) Place the RTL for the stack guard inside the prologue, giving:
*function prologue rtl
*stack guard code (__stack_chk_guard)
*NOTE_INSN_PROLOGUE_END
*NOTE_INSN_FUNCTION_BEG
*rest of the function rtl
Then this would then automatically stop the line number being dumped for the
stack guard. The rest of the assembly would be the same.
Downside here is that in the future new optimisations could be added that have
exactly the same issue.
2) Add line numbers to NOTE_INSN_FUNCTION_BEG and remove line numbers from
stack guard code (which currently has the line number for the { line)
3) Ensure the stack guard code has the line number of the first line of the
function main body.
I'm not sure if 2 and 3 will break instruction reordering.
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Subject: [Bug testsuite/88290] [9 regression] 23_containers/deque/erasure.cc fails after r266672
Date: Mon, 10 Dec 2018 15:34:00 -0000
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seurer at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #2 from seurer at gcc dot gnu.org ---
Not sure when it was fixed but it is not failing any longer.
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Subject: [Bug lto/86004] [9 regression] Several lto test cases begin failing with r260963
Date: Mon, 10 Dec 2018 15:44:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45201
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45201&action=edit
gcc9-pr86004.patch
Untested testsuite fix, tested both on a system with binutils 2.25 (where those
tests previously failed, now UNSUPPORTED) and recent ones (where it still
PASSes).
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Subject: [Bug libstdc++/88290] [9 regression] 23_containers/deque/erasure.cc fails after r266672
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Component|testsuite |libstdc++
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, it would have been r266673.
The component should have been "libstdc++" (I won't see it otherwise). It was a
problem in the library headers (revealed by the tests), not a problem in the
testsuite itself.
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Subject: [Bug target/88418] [7/8/9 Regression] ICE in extract_insn, at recog.c:2305 (error: unrecognizable insn)
Date: Mon, 10 Dec 2018 15:47:00 -0000
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--- Comment #2 from uros at gcc dot gnu.org ---
Author: uros
Date: Mon Dec 10 15:47:16 2018
New Revision: 266958
URL: https://gcc.gnu.org/viewcvs?rev=266958&root=gcc&view=rev
Log:
PR target/88418
* config/i386/i386.c (ix86_expand_sse_cmp): For vector modes,
check operand 1 with vector_operand predicate.
(ix86_expand_sse_movcc): For vector modes, check op_true with
vector_operand, not nonimmediate_operand.
testsuite/ChangeLog:
PR target/88418
* gcc.target/i386/pr88418.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr88418.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug sanitizer/85777] [7/8/9 Regression] -fsanitize=undefined makes a -Wmaybe-uninitialized warning disappear
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--- Comment #4 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to Jakub Jelinek from comment #3)
> If you care about warnings as well as sanitization, I'd suggest separate
> builds for warnings and for sanitization, the latter perhaps with -w.
This is fine for code that is fixed, but this makes developing and debugging
harder, when testing code just after making changes.
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Subject: [Bug sanitizer/85777] [7/8/9 Regression] -fsanitize=undefined makes a -Wmaybe-uninitialized warning disappear
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That can be dealt in the Makefile rules, for sanitization use something like
$(CC) $(CFLAGS) $(WARNOPTS) -S -o /dev/null $<
$(CC) $(CFLAGS) $(SANITIZEOPTS) -c -o $@ $< 2>/dev/null
or similar.
>From gcc-bugs-return-625374-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 16:04:29 2018
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Subject: [Bug tree-optimization/85459] [8/9 Regression] Larger code generated from GMP template meta-programming
Date: Mon, 10 Dec 2018 16:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jamborm at gcc dot gnu.org
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
On the #c4 testcase it is:
/opt/notnfs/gcc-bisect/obj/gcc/cc1plus.240000 -quiet -O3 -fno-exceptions
pr85459.C; g++ -c -o pr85459{.o,.s}; size pr85459.o
text data bss dec hex filename
438 0 0 438 1b6 pr85459.o
/opt/notnfs/gcc-bisect/obj/gcc/cc1plus.255509 -quiet -O3 -fno-exceptions
pr85459.C; g++ -c -o pr85459{.o,.s}; size pr85459.o
text data bss dec hex filename
334 152 0 486 1e6 pr85459.o
/opt/notnfs/gcc-bisect/obj/gcc/cc1plus.255510 -quiet -O3 -fno-exceptions
pr85459.C; g++ -c -o pr85459{.o,.s}; size pr85459.o
text data bss dec hex filename
833 160 0 993 3e1 pr85459.o
/opt/notnfs/gcc-bisect/obj/gcc/cc1plus.266943 -quiet -O3 -fno-exceptions
pr85459.C; g++ -c -o pr85459{.o,.s}; size pr85459.o
text data bss dec hex filename
813 160 0 973 3cd pr85459.o
So the only significant growth there is due to the SRA change.
For -Os the sizes are much larger, 1075 at r240000, 789 at r255509, 919 at
r255510 and 939 at r266943.
>From gcc-bugs-return-625375-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 16:20:27 2018
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Subject: [Bug sanitizer/85777] [7/8/9 Regression] -fsanitize=undefined makes a -Wmaybe-uninitialized warning disappear
Date: Mon, 10 Dec 2018 16:20:00 -0000
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--- Comment #6 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
But this cannot apply to projects that use GNU Automake, which does not
generate such rules. And with Automake, things are more complex in practice,
because in the rules, there are additional options for dependency tracking.
>From gcc-bugs-return-625376-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 16:39:12 2018
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From: "brennan at umanwizard dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88413] g++ mangles names involving unresolved names in function argument template parameters differently from the ABI standard.
Date: Mon, 10 Dec 2018 16:39:00 -0000
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--- Comment #8 from brennan at umanwizard dot com ---
Yes that is the literal srN string and in fact GCC does output that sometimes,
for example on the following program which made it a lot clearer to me what is
going on.
template <int i>
struct S1 {
};
struct S2
{
template <typename T>
struct S3 {
static constexpr int val = sizeof(T);
};
};
template <typename T>
void g(S1<S2::S3<T>::val> * = nullptr) {
}
void h() {
g<int>();
}
in which g<int> is mangled as __Z1gIiEvP2S1IXsrN2S22S3IT_EE3valEE . Clang
mangles it as __Z1gIiEvP2S1IXsr2S22S3IT_EE3valEE -- notice there is no "N" in
Clang's version. Again I feel Clang is correct, based on my understanding of
the standard.
GCC apparently uses only the two productions
<unresolved-name> ::= sr <unresolved-type> <base-unresolved-name> # T::x /
decltype(p)::x
<unresolved-name> ::= srN <unresolved-type> <unresolved-qualifier-level>+ E
<base-unresolved-name>
# T::N::x
/decltype(p)::N::x
But if you look up "unresolved-type" in the standard, it is clear that those
two productions should only be used when the first element in the chain is a
template parameter, not some random class or namespace. So it is wrong to
encode "S2::S3<T>::val" with either of those, because "S2" is not an
"<unresolved-type>". Presumably this is what the standard authors were getting
at by using the letter "T" in the comment.
The production GCC should be using in that program, and the one Clang actually
does use, is:
<unresolved-name> ::= [gs] sr <unresolved-qualifier-level>+ E
<base-unresolved-name>
# A::x,
N::y, A<T>::z; "gs" means leading "::"
In S2::S3<T>::val, each of S2 and S3<T> is an "<unresolved-qualifier-level>"
and val is a "<base-unresolved-name>".
>From gcc-bugs-return-625377-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 16:46:40 2018
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Subject: [Bug c++/88413] g++ mangles names involving unresolved names in function argument template parameters differently from the ABI standard.
Date: Mon, 10 Dec 2018 16:46:00 -0000
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--- Comment #9 from brennan at umanwizard dot com ---
There is an open issue from Oct. 2017 on the ABI standard's official website
(which is a Github repo):
https://github.com/itanium-cxx-abi/cxx-abi/issues/38
It appears to be the exact thing we are seeing here.
The person who opened that issue does think GCC's behavior, although wrong
according to the standard, is better. However it doesn't seem to have gone
anywhere since 10/2017 so I'm not sure whether they will in fact change the
standard.
>From gcc-bugs-return-625378-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 17:08:22 2018
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Subject: [Bug lto/86004] [9 regression] Several lto test cases begin failing with r260963
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--- Comment #12 from Jan Hubicka <hubicka at ucw dot cz> ---
Thanks a lot for looking into this. Indeed disabling the tests is
probably good idea, so the patch looks good to me. Somewhere we should
document minimal binutils release supporting incremental link...
Honza
>From gcc-bugs-return-625379-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 17:13:02 2018
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Subject: [Bug rtl-optimization/84345] [8/9 Regression] ICE: qsort checking failed (error: qsort comparator non-negative on sorted output: 1)
Date: Mon, 10 Dec 2018 17:13:00 -0000
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--- Comment #6 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
I think gcc_qsort doesn't really change things here, validation failure implies
a logic issue in the comparator, so some step is not always working as the
author intended.
And even with gcc_qsort it's still an ice-checking (possibly on valid code).
I guess evidently people don't worry too much about currently open qsort_chk
bugs, but it doesn't make sense that with gcc_qsort we should care even less.
>From gcc-bugs-return-625380-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 17:19:39 2018
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Subject: [Bug rtl-optimization/84345] [8/9 Regression] ICE: qsort checking failed (error: qsort comparator non-negative on sorted output: 1)
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I thought the main argument for the qsort checking was to avoid different code
generation between different hosts (e.g. with cross-compilers etc.).
Some of the comparator issues were just easy bugs in the logic, but others are
not really easily convertible to what the checking requires, it is just a
heuristic to get reasonable code generation (especially some of the RTL ones).
The argument about different code generation is gone with gcc_qsort.
>From gcc-bugs-return-625381-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 17:40:46 2018
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Subject: [Bug c/88430] -Wmissing-attributes warnings when including libquadmath headers
Date: Mon, 10 Dec 2018 17:40:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45202
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45202&action=edit
gcc9-pr88430.patch
For quadmath_weak.h it can be easily handled with the attached patch.
There are additional 166 occurrences of warnings in gthr*.h, and some further
ones in libgfortran.
I'm worried about this warning though, because while in the libquadmath case
the alias targets are declared next to it in adjacent header provided by the
same library, in gthr*.h case it is a common example how a weakref is created
for a system header provided function. For those one often doesn't know what
exact attributes are used and it is quite hard to query that (configure
grepping preprocessed source, what else?).
>From gcc-bugs-return-625382-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 17:43:00 2018
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Subject: [Bug c/88430] -Wmissing-attributes warnings when including libquadmath headers
Date: Mon, 10 Dec 2018 17:42:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The change occurred between r265975 (no warning) and r266035 (warnings).
>From gcc-bugs-return-625383-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 17:47:51 2018
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Subject: [Bug c/88430] -Wmissing-attributes warnings when including libquadmath headers
Date: Mon, 10 Dec 2018 17:47:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
The expected mechanism to apply the attributes is by using the new copy
attribute. (It's been on my to-do list to look into these.)
>From gcc-bugs-return-625384-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 17:58:13 2018
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Subject: [Bug target/87369] [9 Regression] Regression on aarch64/copysign-bsl.c since r264264
Date: Mon, 10 Dec 2018 17:58:00 -0000
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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>From gcc-bugs-return-625385-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 18:06:17 2018
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Subject: [Bug fortran/88269] ICE in gfc_format_decoder, at fortran/error.c:947
Date: Mon, 10 Dec 2018 18:06:00 -0000
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--- Comment #2 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Mon Dec 10 18:05:37 2018
New Revision: 266959
URL: https://gcc.gnu.org/viewcvs?rev=266959&root=gcc&view=rev
Log:
2018-12-10 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88269
* io.c (io_constraint): Update macro. If locus line buffer is NULL,
use gfc_current_locus in error messages.
(check_io_constraints): Catch missing IO UNIT in write and read
statements. io_constraint macro is incompatible here.
2018-12-10 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88269
* gfortran.dg/pr88269.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr88269.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/io.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-625386-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 18:18:20 2018
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Subject: [Bug target/88433] New: wrong code for printf after a pointer cast from a pointer to an adjacent object
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Bug ID: 88433
Summary: wrong code for printf after a pointer cast from a
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This is from Exploring C Semantics and Pointer Provenance:
https://www.cl.cam.ac.uk/~pes20/cerberus/cerberus-popl2019.pdf
the following test case:
https://cerberus.cl.cam.ac.uk/cerberus?defacto/provenance_basic_using_uintptr_t_global_yx.c
GCC emits code with different effects for each of the two functions below even
when the objects x and y are adjacent to each other: in f(), the call to printf
outputs the modified value of y. In g(), however, it outputs the value of y
before modification.
I consider the code in the test case undefined, but a) my understanding from
Richard is that the middle-end intentionally doesn't track pointer provenance
through integer conversions (and so doesn't necessarily treat this sort of
"object hopping" as undefined), and b) the PNVI model outlined in the paper
above and expected to be proposed for C2X makes this code valid (the model
allows p to take on the provenance of y as a result of the integer <-> pointer
casts).
Looking at the dumps, I think (a) is true for this test case in both f() and
g(). The different output from g() appears to be due to the x86_64 back
performing the assignment *p = 11 only after it has stored the value of y in
the register passed to printf. Other back-ends I've looked at produce the same
output from g() as from f().
int y = 2, x = 1;
void f (void)
{
long ix = (long)&x;
long iy = (long)&y;
ix += 4;
int *p = (int*)ix;
int *q = (int*)iy;
if (p == q) {
*p = 11;
__builtin_printf ("%i", y); // prints 11
}
}
void g (void)
{
long ix = (long)&x;
long iy = (long)&y;
ix += 4;
int *p = (int*)ix;
int *q = (int*)iy;
if (!__builtin_memcmp (&p, &q, sizeof p)) {
*p = 11;
__builtin_printf ("%i", y); // prints 2
}
}
>From gcc-bugs-return-625387-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 18:44:39 2018
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Subject: [Bug tree-optimization/86196] [9 Regression] Bogus -Wrestrict on memcpy between array elements at unequal indices
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Any progress on this?
>From gcc-bugs-return-625388-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 18:59:02 2018
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Subject: [Bug middle-end/86979] [9 Regression] ICE: in maybe_record_trace_start, at dwarf2cfi.c:2348 with -m32 on darwin
Date: Mon, 10 Dec 2018 18:59:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Can't reproduce in current trunk's cross to darwin, can you still reproduce?
>From gcc-bugs-return-625389-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 19:01:12 2018
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Subject: [Bug middle-end/88397] attribute malloc ignored on function pointers when alloc_size is accepted
Date: Mon, 10 Dec 2018 19:01:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
The problem with attribute noreturn is tracked separately in bug 79604 (the C
front end seems to do the right thing there, as do Clang and ICC in both C and
C++ modes).
For attributes alloc_align and malloc, what concern do you have with accepting
them on function pointers and function types? (So they work the same way as
alloc_size.)
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Subject: [Bug middle-end/86979] [9 Regression] ICE: in maybe_record_trace_start, at dwarf2cfi.c:2348 with -m32 on darwin
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Can't reproduce in current trunk's cross to darwin, can you still reproduce?
Yes with compilers configured with --enable-checking=yes. I don't see any ICE
for those configured with --enable-checking=release.
>From gcc-bugs-return-625391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 19:18:41 2018
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Subject: [Bug middle-end/86979] [9 Regression] ICE: in maybe_record_trace_start, at dwarf2cfi.c:2348 with -m32 on darwin
Date: Mon, 10 Dec 2018 19:18:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Any particular tuning option (what -march/-mtune is the default)?
Can you attach your auto-host.h?
Perhaps could you attach a tarball with -da dumps with the above options, so I
can try to figure out why I can't reproduce this?
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Subject: [Bug fortran/88269] ICE in gfc_format_decoder, at fortran/error.c:947
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--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Mon Dec 10 19:26:43 2018
New Revision: 266960
URL: https://gcc.gnu.org/viewcvs?rev=266960&root=gcc&view=rev
Log:
2018-12-10 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88269
* io.c (io_constraint): Update macro. If locus line buffer is NULL,
use gfc_current_locus in error messages.
(check_io_constraints): Catch missing IO UNIT in write and read
statements. io_constraint macro is incompatible here.
2018-12-10 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88269
* gfortran.dg/pr88269.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88269.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/io.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/88216] [9 Regression] ICE (-std=c++2a) in cxx_eval_constant_expression, at cp/constexpr.c:4602
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Patch posted: <https://gcc.gnu.org/ml/gcc-patches/2018-12/msg00597.html>
We'll see how that goes.
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
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--- Comment #11 from Askar Safin <safinaskar at mail dot ru> ---
(In reply to Jonathan Wakely from comment #10)
> I wish people would just learn how enums work, it's not that complicated.
Okey, now I understand everything. Now I see that, well, -fstrict-enums
silences warning for code from comment #1 only because number of enum
alternatives happen to be power of 2. If it would be, say, 3, then code from
comment #1 will always produce a warning even with -fstrict-enums. And also I
understand that code with "enum class" will always produce a warning.
So, gcc doesn't have way to enable clang-style warning behavior for enums. And
gcc doesn't have such way for "enum class", too. And -fstrict-enums enables
clang-style warning behavior for code from comment #1 only because this code
has power of 2 number of alternatives.
And also I understand that current gcc behavior is not bug and is absolutely
standard-compliant.
But, well, I still don't like current g++ behavior. I want g++ to not report
"reaching end of non-void..." if all switch alternatives are handled, at least
if some optional option is passed to gcc. I want clang behavior. Okey, you may
mark this bug as "wishlist", but I still think that clang-style behavior here
is very useful feature.
Look here, LLVM project was forced to introduce special kludge to make sure g++
will not give useless warnings:
http://llvm.org/docs/CodingStandards.html#don-t-use-default-labels-in-fully-covered-switches-over-enumerations
>From gcc-bugs-return-625395-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 20:04:12 2018
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Subject: [Bug fortran/88269] ICE in gfc_format_decoder, at fortran/error.c:947
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--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Mon Dec 10 20:03:32 2018
New Revision: 266962
URL: https://gcc.gnu.org/viewcvs?rev=266962&root=gcc&view=rev
Log:
2018-12-10 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88269
* io.c (io_constraint): Update macro. If locus line buffer is NULL,
use gfc_current_locus in error messages.
(check_io_constraints): Catch missing IO UNIT in write and read
statements. io_constraint macro is incompatible here.
2018-12-10 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88269
* gfortran.dg/pr88269.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr88269.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/io.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88269] ICE in gfc_format_decoder, at fortran/error.c:947
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |kargl at gcc dot gnu.org
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Target Milestone|--- |7.5
--- Comment #5 from kargl at gcc dot gnu.org ---
Fixed on trunk, branch-8, and branch-7. Closing
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Subject: [Bug c++/52869] [DR 1207] "this" not being allowed in noexcept clauses
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--- Comment #13 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Thanks Jon, I'll poke at it some more.
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
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--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's not a useless warning. If I call your function from comment 7 like this, I
get undefined behaviour:
CoverMyBases( Enum{2} );
Your switch is undefined for this code. That's what GCC is warning you about.
To tell GCC you will never call the function with any value except Enum::A or
Enum::B, add
default: __builtin_unreachable();
>From gcc-bugs-return-625399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 20:37:47 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
Date: Mon, 10 Dec 2018 20:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87951
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #12)
> It's not a useless warning. If I call your function from comment 7 like
> this, I get undefined behaviour:
>
> CoverMyBases( Enum{2} );
>
> Your switch is undefined for this code. That's what GCC is warning you
> about. To tell GCC you will never call the function with any value except
> Enum::A or Enum::B, add
>
> default: __builtin_unreachable();
Maybe better to add it after the switch if you want to make sure that you get a
warning with -Wswitch if a new enumerator is added.
>From gcc-bugs-return-625400-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 20:40:33 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88434] New: operator< should take precedence over template argument in basic.lookup.classref
Date: Mon, 10 Dec 2018 20:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88434
Bug ID: 88434
Summary: operator< should take precedence over template
argument in basic.lookup.classref
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gieseanw+gcc at gmail dot com
Target Milestone: ---
Semi-related: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85570
Bug discovered here: https://stackoverflow.com/q/53712642/27678
The following code does not compile in gcc 9 (or earlier) or clang 8 (or
earlier), but does in MSVC 19.00.23506.
compile with -std=c++11 Code follows:
#include <type_traits>
using namespace std;
struct A{ int rank; };
template<typename T>
bool comp_rank(const T &a, const T &b){
return a.rank < b.rank;
}
int main()
{
A a{42}, b{0};
comp_rank(a, b);
}
gcc fails with
prog.cc: In function 'bool comp_rank(const T&, const T&)':
prog.cc:9:23: error: type/value mismatch at argument 1 in template parameter
list for 'template<class> struct std::rank'
9 | return a.rank < b.rank;
| ^~~~
prog.cc:9:23: note: expected a type, got 'b.rank'
This appears to violate [basic.lookup.classref] which states
In a class member access expression, if the . or -> token is immediately
followed by an identifier followed by a <, the identifier must be looked up to
determine whether the < is the beginning of a template argument list or a
less-than operator. The identifier is first looked up in the class of the
object expression. If the identifier is not found, it is then looked up in the
context of the entire postfix-expression and shall name a class template.
>From gcc-bugs-return-625401-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 20:51:18 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86608] [7/8/9 Regression] volatile variable is taken as a constexpr
Date: Mon, 10 Dec 2018 20:51:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
On it now.
>From gcc-bugs-return-625402-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 21:10:34 2018
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From: "mattis at mattisborgen dot se" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88435] New: Compiling with optimizations causes the compiler to fail.
Date: Mon, 10 Dec 2018 21:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88435
Bug ID: 88435
Summary: Compiling with optimizations causes the compiler to
fail.
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: mattis at mattisborgen dot se
Target Milestone: ---
pdp11-aout-gcc -save-temps -O2 -v -m10 -Ttext 1000 -msoft-float
-nostartfiles -nodefaultlibs -nostdlib -fno-strict-aliasing -fwrapv
-fno-aggressive-loop-optimizations gccbug.c
Using built-in specs.
COLLECT_GCC=pdp11-aout-gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/pdp11-aout/8.2.0/lto-wrapper
Target: pdp11-aout
Configured with: ./configure --target=pdp11-aout --disable-nls
--without-headers --enable-languages=c
Thread model: single
gcc version 8.2.0 (GCC)
COLLECT_GCC_OPTIONS='-save-temps' '-O2' '-v' '-m10' '-Ttext' '1000'
'-msoft-float' '-nostartfiles' '-nodefaultlibs' '-nostdlib'
'-fno-strict-aliasing' '-fwrapv' '-fno-aggressive-loop-optimizations'
/usr/local/libexec/gcc/pdp11-aout/8.2.0/cc1 -E -quiet -v -imultilib
msoft-float gccbug.c -m10 -msoft-float -fno-strict-aliasing -fwrapv
-fno-aggressive-loop-optimizations -O2 -fpch-preprocess -o gccbug.i
ignoring nonexistent directory
"/usr/local/lib/gcc/pdp11-aout/8.2.0/../../../../pdp11-aout/sys-include"
ignoring nonexistent directory
"/usr/local/lib/gcc/pdp11-aout/8.2.0/../../../../pdp11-aout/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/lib/gcc/pdp11-aout/8.2.0/include
/usr/local/lib/gcc/pdp11-aout/8.2.0/include-fixed
End of search list.
COLLECT_GCC_OPTIONS='-save-temps' '-O2' '-v' '-m10' '-Ttext' '1000'
'-msoft-float' '-nostartfiles' '-nodefaultlibs' '-nostdlib'
'-fno-strict-aliasing' '-fwrapv' '-fno-aggressive-loop-optimizations'
/usr/local/libexec/gcc/pdp11-aout/8.2.0/cc1 -fpreprocessed gccbug.i -quiet
-dumpbase gccbug.c -m10 -msoft-float -auxbase gccbug -O2 -version
-fno-strict-aliasing -fwrapv -fno-aggressive-loop-optimizations -o gccbug.s
GNU C17 (GCC) version 8.2.0 (pdp11-aout)
compiled by GNU C version 4.2.1 Compatible Apple LLVM 5.0
(clang-500.2.76), GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl
version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C17 (GCC) version 8.2.0 (pdp11-aout)
compiled by GNU C version 4.2.1 Compatible Apple LLVM 5.0
(clang-500.2.76), GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl
version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: bc392ef67ca9ec448731a9f0a726ee14
gccbug.c: In function 'pollConsole':
gccbug.c:11:1: error: unrecognizable insn:
}
^
(insn 13 12 14 2 (set (reg:SI 35)
(ashift:SI (reg:SI 34)
(const_int -9 [0xfffffffffffffff7]))) "gccbug.c":5 -1
(nil))
during RTL pass: vregs
gccbug.c:11:1: internal compiler error: in extract_insn, at recog.c:2304
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.
$ cat gccbug.c
int pollConsole () {
volatile unsigned int * rxcsr = (unsigned int *) 0177560;
unsigned int tmp = 512 & *rxcsr;
if (tmp == 512) {
return 1;
}
else {
return 0;
}
}
The compile fail if the two literals 512 is equal and greater than 16. It also
has to have one single bit set. I.e. 32, 64, 128...
33,34 woks fine.
$ cat gccbug.i
# 1 "gccbug.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "gccbug.c"
int pollConsole () {
volatile unsigned int * rxcsr = (unsigned int *) 0177560;
unsigned int tmp = 512 & *rxcsr;
if (tmp == 512) {
return 1;
}
else {
return 0;
}
}
>From gcc-bugs-return-625403-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 21:11:14 2018
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From: "bugzilla@poradnik-webmastera.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88271] Omit test instruction after add
Date: Mon, 10 Dec 2018 21:11:00 -0000
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--- Comment #10 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
Here is possible code transformation to equivalent form, where this
optimization can be simply applied. This change also has a bit surprising side
effect, second nested while loop is unrolled.
[code]
void test2()
{
int level = 0;
int val = 1;
while (1)
{
while(1)
{
val = data[level] << 1;
++level;
if (val)
continue;
else
break;
}
while(1)
{
--level;
val = data[level];
if (!val)
continue;
else
break;
}
}
}
[/code]
>From gcc-bugs-return-625404-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 21:22:32 2018
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From: "mattis at mattisborgen dot se" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88435] Compiling with optimizations causes the compiler to fail.
Date: Mon, 10 Dec 2018 21:22:00 -0000
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--- Comment #1 from Mattis Lind <mattis at mattisborgen dot se> ---
The very same bug is present in 9.0
The problem goes away if you change to pdp-11/40 rather than pdp-11/10 using
-m40 option.
>From gcc-bugs-return-625405-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 21:23:42 2018
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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/88436] New: [9 regression] r265421 causes gcc.target/powerpc/pr54240.c to fail
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Bug ID: 88436
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Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
Looks like this test case may have been missed when updating those affected by
the changes in this revision.
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.target/powerpc/pr54240.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -O2 -misel -fdump-tree-phiopt-details -S -o pr54240.s
PASS: gcc.target/powerpc/pr54240.c (test for excess errors)
FAIL: gcc.target/powerpc/pr54240.c scan-tree-dump phiopt1 "Hoisting adjacent
loads"
>From gcc-bugs-return-625406-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 21:25:27 2018
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Subject: [Bug lto/88422] collect2.exe: fatal error: lto-wrapper returned 1 exit status: file not recognized: file truncated
Date: Mon, 10 Dec 2018 21:25:00 -0000
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--- Comment #4 from Jim Wilson <wilson at gcc dot gnu.org> ---
I used a cross compiler, so ulong_type is easy enough to check. For
simple-object-elf.i I see
__extension__ typedef unsigned long long uint64_t;
...
__extension__ typedef uint64_t ulong_type;
which looks right.
>From gcc-bugs-return-625407-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 21:42:54 2018
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From: "pkoning at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88435] Compiling with optimizations causes the compiler to fail.
Date: Mon, 10 Dec 2018 21:42:00 -0000
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--- Comment #2 from pkoning at gcc dot gnu.org ---
I don't see it in the current V9, rev 266823.
./xgcc -B. -O2 -S ~/Documents/pr88435.c -m10
cat pr88435.s
.text
.even
.globl _pollConsole
_pollConsole:
mov @$-0220,r0
mov $011,r1
L_4:
clc
ror r0
dec r1
bne L_4
bic $-02,r0
rts pc
Clearly this is not optimal -- it shouldn't do this with a shift but rather
using a "BIT" instruction. But the code does produce the correct answer and
the compiler doesn't fail.
>From gcc-bugs-return-625408-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 22:05:41 2018
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From: "jwerner at chromium dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/88437] New: Excessive struct alignment on x86_64
Date: Mon, 10 Dec 2018 22:05:00 -0000
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Bug ID: 88437
Summary: Excessive struct alignment on x86_64
Product: gcc
Version: 8.0
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Priority: P3
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Compile the following test file for the x86_64 target:
struct {
void *a;
void *b;
} mystruct __attribute__((__section__(".data.mystruct"));
Then run objdump -x on the output file. The .data.mystruct section will have an
alignment of 2**4, even though the largest member of the struct only requires
an alignment of 2**3. GCC always seems to align structures to the whole struct
size, at least to a maximum of 2**5.
This behavior seems questionable at best, and it is inconsistent from all other
architectures (I tested i686 and aarch64, both of which always only align to
the largest member). I assume it may be intended as a cache line
optimization(?), but it affects code size very negatively, so it should at
least be up to the user and not hardcoded by architecture. I couldn't find any
flag in the documentation to disable this. It even occurs with -Os even though
that's meant to strongly favor size over other optimizations.
>From gcc-bugs-return-625409-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 22:16:06 2018
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Subject: [Bug middle-end/86979] [9 Regression] ICE: in maybe_record_trace_start, at dwarf2cfi.c:2348 with -m32 on darwin
Date: Mon, 10 Dec 2018 22:16:00 -0000
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Created attachment 45203
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45203&action=edit
auto-host.h
> Any particular tuning option (what -march/-mtune is the default)?
Target: x86_64-apple-darwin18.2.0
Configured with: ../work/configure --prefix=/opt/gcc/gcc9w
--enable-languages=c,c++,fortran,objc,obj-c++,ada,lto --with-gmp=/opt/mp-new
--with-system-zlib --with-isl=/opt/mp-new --enable-lto --enable-plugin
--with-arch=corei7 --with-cpu=corei7
--with-sysroot=/Applications/Xcode-6.2.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk
> Can you attach your auto-host.h?
auto-host.h attached.
>From gcc-bugs-return-625410-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 22:18:29 2018
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Subject: [Bug middle-end/86979] [9 Regression] ICE: in maybe_record_trace_start, at dwarf2cfi.c:2348 with -m32 on darwin
Date: Mon, 10 Dec 2018 22:18:00 -0000
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Created attachment 45204
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tarball for gcc9 -S -da
/opt/gcc/work/gcc/testsuite/gcc.c-torture/compile/pr69102.c -Og
-fschedule-insns2 -fselective-scheduling2 -fno-tree-fre
--param=max-sched-extend-regions-iters=2 -m32
> Perhaps could you attach a tarball with -da dumps with the above options,
> so I can try to figure out why I can't reproduce this?
tarball attached.
>From gcc-bugs-return-625411-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 22:29:30 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88438] New: A pointer function reference can denote a variable in any variable definition context.
Date: Mon, 10 Dec 2018 22:29:00 -0000
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Bug ID: 88438
Summary: A pointer function reference can denote a variable in
any variable definition context.
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Apparently this feature of F2008 is still flagged as unimplemented in the F2008
chart on the gfortran wiki page. Today there was a discussion on the Intel
Forum, https://software.intel.com/en-us/comment/1930834#comment-1930834
that the following code is valid F2008, but not valid F2003, because the
selector is a function reference with a data pointer result.
I think this should be marked as an item in the chart here
https://gcc.gnu.org/wiki/Fortran2008Status with a red "No" status.
The code discussed in that Intel forum is repeated here:
module mod
implicit none
private
public get
public inc
type, public :: t
integer :: i = 5
end type t
contains
function get(x) result(p)
integer, pointer :: p
type(t), target, intent(in) :: x
p => x%i
end function get
subroutine inc(i)
integer, intent(inout) :: i
i = i + 1
end subroutine inc
end module mod
program assoc_func_intent
use mod
implicit none
type(t) :: x
print *,x%i
associate(p => get(x))
call inc(p)
end associate
print *,x%i
end program assoc_func_intent
>From gcc-bugs-return-625412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 23:10:52 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
Date: Mon, 10 Dec 2018 23:10:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #14 from Martin Sebor <msebor at gcc dot gnu.org> ---
This is a duplicate of bug 87950, with most of the same discussion.
*** This bug has been marked as a duplicate of bug 87950 ***
>From gcc-bugs-return-625413-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 23:10:53 2018
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
Date: Mon, 10 Dec 2018 23:10:00 -0000
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--- Comment #13 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 87951 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-625414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 23:55:08 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88439] New: missing -Wrestrict on memcpy with a variable offset
Date: Mon, 10 Dec 2018 23:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88439
Bug ID: 88439
Summary: missing -Wrestrict on memcpy with a variable offset
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
Thew -Wrestrict warning doesn't trigger for the following overlapping call to
memcpy even though it seems that it could:
$ cat x.c && gcc -O2 -S -Wall x.c
char a[32][32];
void g (int i, int j)
{
if (i == j) // typo, should be: i != j
__builtin_memcpy (a[j], a[i], sizeof a[i]); // missing -Wrestrict
}
>From gcc-bugs-return-625415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 10 23:58:53 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++/85570] Resolution of unqualified-id in member access involving templates fails
Date: Mon, 10 Dec 2018 23:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85570
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note typedef has a similar issue and you don't even need to have main or an use
of test to show the issue:
void func() {}
};
template <typename T>
struct C : public A {
typedef A TheA;
};
template <typename T>
void test1() {
C<T> b;
b.TheA::func();
}
>From gcc-bugs-return-625416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 00:01:38 2018
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Subject: [Bug tree-optimization/88440] New: size optimization of memcpy-like code
Date: Tue, 11 Dec 2018 00:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88440
Bug ID: 88440
Summary: size optimization of memcpy-like code
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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https://godbolt.org/z/RTji7B
void foo(char* restrict dst, const char* buf) {
for (int i=0; i<8; ++i)
*dst++ = *buf++;
}
$ gcc -Os
$ gcc -O2
.L2:
mov dl, BYTE PTR [rsi+rax]
mov BYTE PTR [rdi+rax], dl
inc rax
cmp rax, 8
jne .L2
$ gcc -O3
mov rax, QWORD PTR [rsi]
mov QWORD PTR [rdi], rax
$ arm-none-eabi-gcc -O3 -mthumb -mcpu=cortex-m4
ldr r3, [r1] @ unaligned
ldr r2, [r1, #4] @ unaligned
str r2, [r0, #4] @ unaligned
str r3, [r0] @ unaligned
The -O3 code is both faster and smaller for both ARM and x64:
"note: Loop 1 distributed: split to 0 loops and 1 library calls."
Should be considered for -O2 and -Os as well.
>From gcc-bugs-return-625417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 00:04:32 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88434] operator< should take precedence over template argument in basic.lookup.classref
Date: Tue, 11 Dec 2018 00:04:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-11
Blocks| |12944
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>Semi-related: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85570
It might be related in the sense the namelookup of rank is happening a
definition time rather instantation time.
Shorter testcase (without includes):
template <int> struct rank{};
struct A{ int rank; };
template<typename T>
bool comp_rank(const T &a, const T &b){
return a.rank < b.rank;
}
int main()
{
A a{42}, b{0};
comp_rank(a, b);
}
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=12944
[Bug 12944] [meta-bug] C++ name-lookup problems
>From gcc-bugs-return-625418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 00:07:23 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 tree-optimization/88440] size optimization of memcpy-like code
Date: Tue, 11 Dec 2018 00:07:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I thought I had a dup of this bug somewhere which was asking for this
optimization to moved to -O2 (and -Os) and above rather than keep it at -O3 and
above.
>From gcc-bugs-return-625419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 00:25:21 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88441] New: missing warning on a buffer overflow with non-constant offset and constant size
Date: Tue, 11 Dec 2018 00:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88441
Bug ID: 88441
Summary: missing warning on a buffer overflow with non-constant
offset and constant size
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
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The calls to memcpy in both functions either very likely or certainly overflow
the destination yet they are not diagnosed. At least in the simple cases when
the size of the destination (or source) object is known sufficiently early,
before the calls are transformed to MEM_REF, the overflow could be diagnosed.
$ cat x.c && gcc -O2 -S -Wall -fdump-tree-gimple=/dev/stdout x.c
char a[8];
void f (int i, const void *p)
{
// overflow very likely
__builtin_memcpy (a + i, p, sizeof a); // missing -Wstringop-overflow
}
void g (unsigned i, const void *p)
{
// overflow certain
if (i)
__builtin_memcpy (a + i, p, sizeof a); // missing -Wstringop-overflow
}
f (int i, const void * p)
{
_1 = (sizetype) i;
_2 = &a + _1;
__builtin_memcpy (_2, p, 8);
}
g (unsigned int i, const void * p)
{
if (i != 0) goto <D.1916>; else goto <D.1917>;
<D.1916>:
_1 = (sizetype) i;
_2 = &a + _1;
__builtin_memcpy (_2, p, 8);
<D.1917>:
}
>From gcc-bugs-return-625420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 00:28:49 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88442] New: Misleading error message with duplicated struct definitions
Date: Tue, 11 Dec 2018 00:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88442
Bug ID: 88442
Summary: Misleading error message with duplicated struct
definitions
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
q:/home/akpm> cat t.c
struct foo;
struct foo { int a; };
struct foo { int a, b; };
q:/home/akpm> gcc -c t.c
t.c:5:8: error: redefinition of 'struct foo'
struct foo { int a, b; };
^~~
t.c:1:8: note: originally defined here
struct foo;
It's arguably misleading and certainly unuseful to say that struct foo was
originally defined at line 1. You sit there scratching your head looking at
line 1 wondering why it didn't compile. It would be more useful to point the
user at line 3!
>From gcc-bugs-return-625421-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 00:29:01 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88443] New: [meta-bug] bogus/missing -Wstringop-overflow warnings
Date: Tue, 11 Dec 2018 00:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88443
Bug ID: 88443
Summary: [meta-bug] bogus/missing -Wstringop-overflow warnings
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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This is a meta-bug to track false positives and negatives in the
-Wstringop-overflow warning.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88433] wrong code for printf after a pointer cast from a pointer to an adjacent object
Date: Tue, 11 Dec 2018 00:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88433
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Then again, the "problem" would disappear if the middle-end could be made to
understand that memcmp(&p, &q, sizeof p) is the same thing as p == q for any
integer or pointer types p and q. So maybe it is a middle-end issue because
the back-end doesn't know and can't tell that y is the same as *p.
>From gcc-bugs-return-625423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 01:22:46 2018
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Subject: [Bug tree-optimization/86196] [9 Regression] Bogus -Wrestrict on memcpy between array elements at unequal indices
Date: Tue, 11 Dec 2018 01:22:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Dec 11 01:22:08 2018
New Revision: 266967
URL: https://gcc.gnu.org/viewcvs?rev=266967&root=gcc&view=rev
Log:
PR tree-optimization/86196 - Bogus -Wrestrict on memcpy between array elements
at unequal indices
gcc/ChangeLog:
PR tree-optimization/86196
* gimple-ssa-warn-restrict.c (builtin_memref::builtin_memref): Use
base size only of arrays.
gcc/testsuite/ChangeLog:
PR tree-optimization/86196
* gcc.dg/Wrestrict-18.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/Wrestrict-18.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-warn-restrict.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/84774] [meta-bug] bogus/missing -Wrestrict
Date: Tue, 11 Dec 2018 01:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84774
Bug 84774 depends on bug 86196, which changed state.
Bug 86196 Summary: [9 Regression] Bogus -Wrestrict on memcpy between array elements at unequal indices
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86196
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug tree-optimization/86196] [9 Regression] Bogus -Wrestrict on memcpy between array elements at unequal indices
Date: Tue, 11 Dec 2018 01:24:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed via r266967.
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Subject: [Bug fortran/87922] ICE in gfc_wide_strlen, at fortran/scanner.c:142
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87922
--- Comment #2 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Tue Dec 11 02:34:44 2018
New Revision: 266969
URL: https://gcc.gnu.org/viewcvs?rev=266969&root=gcc&view=rev
Log:
2018-12-10 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/87922
* io.c (gfc_match_open): Additional checks on ASYNCHRONOUS.
2018-12-10 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/87922
* gfortran.dg/io_constraints_8.f90: Update error message.
* gfortran.dg/pr87922.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr87922.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/io.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/io_constraints_8.f90
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Subject: [Bug fortran/87922] ICE in gfc_wide_strlen, at fortran/scanner.c:142
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |kargl at gcc dot gnu.org
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Target Milestone|9.0 |8.3
--- Comment #3 from kargl at gcc dot gnu.org ---
Fixed on trunk and branch-8. Have wrong PR number in ChangeLogs on trunk,
which is why the commit is not reflected here.
>From gcc-bugs-return-625428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 02:44:47 2018
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Subject: [Bug fortran/88139] ICE in get_c_type_name, at fortran/dump-parse-tree.c:3047
Date: Tue, 11 Dec 2018 02:44:00 -0000
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kargl at gcc dot gnu.org changed:
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--- Comment #4 from kargl at gcc dot gnu.org ---
Record F2018 constraint.
C1554 If proc-language-binding-spec is specified for a procedure, each
of its dummy arguments shall be an interoperable procedure (18.3.7)
or a variable that is interoperable (18.3.5, 18.3.6), assumed-shape,
assumed-rank, assumed-type, of type CHARACTER with assumed length,
or that has the ALLOCATABLE or POINTER attribute.
I had a patch for this, but lost it when committing my last 10 patches.
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Subject: [Bug fortran/88139] ICE in get_c_type_name, at fortran/dump-parse-tree.c:3047
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--- Comment #5 from kargl at gcc dot gnu.org ---
(In reply to kargl from comment #4)
> Record F2018 constraint.
>
> C1554 If proc-language-binding-spec is specified for a procedure, each
> of its dummy arguments shall be an interoperable procedure (18.3.7)
> or a variable that is interoperable (18.3.5, 18.3.6), assumed-shape,
> assumed-rank, assumed-type, of type CHARACTER with assumed length,
> or that has the ALLOCATABLE or POINTER attribute.
>
> I had a patch for this, but lost it when committing my last 10 patches.
Thankfully, there are mailing list archives. See
https://gcc.gnu.org/ml/fortran/2018-12/msg00038.html
for the patch.
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Subject: [Bug tree-optimization/88444] New: [9 Regression] ICE: tree check: expected ssa_name, have integer_cst in live_on_edge, at tree-vrp.c:468; or ICE: tree check: expected ssa_name, have integer_cst in get_value_range, at vr-values.c:84
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88444
Bug ID: 88444
Summary: [9 Regression] ICE: tree check: expected ssa_name,
have integer_cst in live_on_edge, at tree-vrp.c:468;
or ICE: tree check: expected ssa_name, have
integer_cst in get_value_range, at vr-values.c:84
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-checking, ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
1.
gcc-9.0.0-alpha20181209 snapshot (r266934) ICEs when compiling the following
snippet w/ -O1 (-O2, -O3, -Ofast):
int ve;
int
br (int, int);
int
nd (long int xt)
{
return !!xt ? xt : 1;
}
void
yo (int ub)
{
ve += br (0, 0) + nd (ub);
}
void
fy (void)
{
int sb = 0;
ve = ve || br (0, 0);
ve = ve || br (0, 0);
ve = ve || br (0, 0);
yo (sb);
}
% gcc-9.0.0-alpha20181209 -O1 -finline-functions -finline-small-functions
-ftree-vrp -fno-tree-ccp -fno-tree-forwprop -fno-tree-fre -c cki1gbbg.c
during GIMPLE pass: vrp
cki1gbbg.c: In function 'fy':
cki1gbbg.c:19:1: internal compiler error: tree check: expected ssa_name, have
integer_cst in live_on_edge, at tree-vrp.c:468
19 | fy (void)
| ^~
0x6dceef tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/tree.c:9757
0x6d9c18 tree_check(tree_node*, char const*, int, char const*, tree_code)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/tree.h:3157
0x6d9c18 live_on_edge
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/tree-vrp.c:468
0x6d9c18 live_on_edge
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/tree-vrp.c:465
0xf7b53f finish_register_edge_assert_for
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/tree-vrp.c:3510
0xf8a927 find_conditional_asserts
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/tree-vrp.c:3554
0xf8a927 find_assert_locations_1
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/tree-vrp.c:3823
0xf8ea12 find_assert_locations
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/tree-vrp.c:3984
0xf8ea12 insert_range_assertions
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/tree-vrp.c:4308
0xf8ea12 execute_vrp
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/tree-vrp.c:6758
2.
Replacing -O1 w/ -Og yield the following:
% gcc-9.0.0-alpha20181209 -Og -finline-functions -finline-small-functions
-ftree-vrp -fno-tree-ccp -fno-tree-forwprop -fno-tree-fre -c cki1gbbg.c
during GIMPLE pass: printf-return-value
cki1gbbg.c: In function 'fy':
cki1gbbg.c:19:1: internal compiler error: tree check: expected ssa_name, have
integer_cst in get_value_range, at vr-values.c:84
19 | fy (void)
| ^~
0x6dceef tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/tree.c:9757
0x6f4cd1 tree_check(tree_node const*, char const*, int, char const*, tree_code)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/tree.h:3413
0x6f4cd1 vr_values::get_value_range(tree_node const*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/vr-values.c:84
0x14f9bd6 evrp_range_analyzer::get_value_range(tree_node const*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/gimple-ssa-evrp-analyze.h:41
0x14f9bd6 evrp_range_analyzer::try_find_new_range(tree_node*, tree_node*,
tree_code, tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/gimple-ssa-evrp-analyze.c:87
0x14fa9d3
evrp_range_analyzer::record_ranges_from_incoming_edge(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/gimple-ssa-evrp-analyze.c:193
0x14faf4d evrp_range_analyzer::enter(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/gimple-ssa-evrp-analyze.c:76
0x151a7eb before_dom_children
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/gimple-ssa-sprintf.c:4157
0x14d78d2 dom_walker::walk(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/domwalk.c:353
0x1515acd execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/gimple-ssa-sprintf.c:4192
>From gcc-bugs-return-625431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 03:32:01 2018
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
Date: Tue, 11 Dec 2018 03:32:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=61864
--- Comment #15 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Askar Safin from comment #11)
> (In reply to Jonathan Wakely from comment #10)
> > I wish people would just learn how enums work, it's not that complicated.
>
> Okey, now I understand everything. Now I see that, well, -fstrict-enums
> silences warning for code from comment #1 only because number of enum
> alternatives happen to be power of 2. If it would be, say, 3, then code from
> comment #1 will always produce a warning even with -fstrict-enums. And also
> I understand that code with "enum class" will always produce a warning.
>
> So, gcc doesn't have way to enable clang-style warning behavior for enums.
> And gcc doesn't have such way for "enum class", too. And -fstrict-enums
> enables clang-style warning behavior for code from comment #1 only because
> this code has power of 2 number of alternatives.
>
> And also I understand that current gcc behavior is not bug and is absolutely
> standard-compliant.
>
> But, well, I still don't like current g++ behavior. I want g++ to not report
> "reaching end of non-void..." if all switch alternatives are handled, at
> least if some optional option is passed to gcc. I want clang behavior. Okey,
> you may mark this bug as "wishlist", but I still think that clang-style
> behavior here is very useful feature.
>
> Look here, LLVM project was forced to introduce special kludge to make sure
> g++ will not give useless warnings:
> http://llvm.org/docs/CodingStandards.html#don-t-use-default-labels-in-fully-
> covered-switches-over-enumerations
For the warning clang uses mentioned in the link (-Wcovered-switch-default) see
bug 61864. (It looks like the behavior to respect unreachables has been updated
since the last time I checked it)
>From gcc-bugs-return-625432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 04:57:33 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/80520] [7/8/9 Regression] Performance regression from missing if-conversion
Date: Tue, 11 Dec 2018 04:57:00 -0000
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--- Comment #12 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Tue Dec 11 04:56:54 2018
New Revision: 266971
URL: https://gcc.gnu.org/viewcvs?rev=266971&root=gcc&view=rev
Log:
PR tree-optimization/80520
* gimple-ssa-split-paths.c (is_feasible_trace): Recognize half
diamonds that are likely if convertable.
* gcc.dg/tree-ssa/split-path-5.c: Update expected output.
* gcc.dg/tree-ssa/split-path-11.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/split-path-11.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-split-paths.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/split-path-5.c
>From gcc-bugs-return-625433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 05:17:09 2018
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Subject: [Bug tree-optimization/33315] stores not commoned by sinking
Date: Tue, 11 Dec 2018 05:17:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #11 from Jeffrey A. Law <law at redhat dot com> ---
We're closer now than before:
test ()
{
int i;
<bb 2> [local count: 1073741824]:
i_8 = num;
if (i_8 == 1)
goto <bb 3>; [34.00%]
else
goto <bb 5>; [66.00%]
<bb 3> [local count: 365072220]:
MEM[(int *)&a] = 0;
MEM[(int *)&a + 4B] = 0;
<bb 4> [local count: 1073741824]:
MEM[(int *)&a + 8B] = 0;
return;
<bb 5> [local count: 730144446]:
MEM[(int *)&a] = 0;
MEM[(int *)&a + 4B] = 0;
goto <bb 4>; [100.00%]
}
I wonder if the block hashing stuff from ICF would allow us to determine that
bb3 and bb5 are equivalent. That in turn would allow us to recognize the test
in bb2 isn't actually needed.
It was always my hope that the ICF infrastructure could be used in this way.
>From gcc-bugs-return-625434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 06:17:54 2018
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Subject: [Bug c++/88261] [9 Regression] ICE: verify_gimple failed (error: non-trivial conversion at assignment)
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--- Comment #4 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
For G++ versions, where this was accepted with -fpermissive, the code was
wrong:
struct str { int len; char s[]; };
int foo()
{
struct str b = { 2, "b" };
return sizeof(b);
}
=>
movl $4, %eax
ret
>From gcc-bugs-return-625435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 07:08:55 2018
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Subject: [Bug target/88437] Excessive struct alignment on x86_64
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For arrays, this is required by x86-64 psABI, which says that arrays 16 bytes
or larger must be 16 bytes aligned.
For other aggregates, this is an optimization, so that one can use vector
loads/stores to copy the object etc.
If you want to use section attribute and place the structures as an array, you
need to use aligned attribute and specify the exact alignment you want, then it
will be honored and no gaps will be inserted.
>From gcc-bugs-return-625436-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 07:22:34 2018
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
This is due to:
'-malign-data=TYPE'
Control how GCC aligns variables. Supported values for TYPE are
'compat' uses increased alignment value compatible uses GCC 4.8 and
earlier, 'abi' uses alignment value as specified by the psABI, and
'cacheline' uses increased alignment value to match the cache line
size. 'compat' is the default.
You can use -malign-data=abi to get 8 byte alignment for your case.
Not a bug.
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Subject: [Bug tree-optimization/88444] [9 Regression] ICE: tree check: expected ssa_name, have integer_cst in live_on_edge, at tree-vrp.c:468; or ICE: tree check: expected ssa_name, have integer_cst in get_value_range, at vr-values.c:84
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-11
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r266739.
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Subject: [Bug c/88430] -Wmissing-attributes warnings when including libquadmath headers
Date: Tue, 11 Dec 2018 07:46:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Dec 11 07:45:47 2018
New Revision: 266972
URL: https://gcc.gnu.org/viewcvs?rev=266972&root=gcc&view=rev
Log:
PR c/88430
* quadmath_weak.h (__qmath2): Add __quadmath_throw.
Modified:
trunk/libquadmath/ChangeLog
trunk/libquadmath/quadmath_weak.h
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Subject: [Bug c++/88445] New: noexcept(expr) should return true with -fno-exceptions
Date: Tue, 11 Dec 2018 08:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88445
Bug ID: 88445
Summary: noexcept(expr) should return true with -fno-exceptions
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
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Consider the following example:
#include <type_traits>
struct test {
test();
test(test&&);
test& operator=(test&&);
};
void test_func() {
static_assert(noexcept(test{test()}), "");
static_assert(std::is_nothrow_move_constructible<test>::value, "");
static_assert(std::is_nothrow_move_assignable<test>::value, "");
}
The static assertions fail with the -fno-exceptions flag however no exception
could happen because all the exceptions are disabled.
Please adjust the noexcept(expr) logic for the -fno-exceptions flag.
Such adjustment is essential because the standard library heavily relies on the
type traits and chooses the suboptimal algorithms in -fno-exceptions
environments.
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Subject: [Bug tree-optimization/88444] [9 Regression] ICE: tree check: expected ssa_name, have integer_cst in live_on_edge, at tree-vrp.c:468; or ICE: tree check: expected ssa_name, have integer_cst in get_value_range, at vr-values.c:84
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
We end up with non-folded statement
_22 = (long int) 0;
because of all the disabled and enabled optimizations (IPA-VRP propagated
constant not cleaned up).
I think:
--- gcc/tree-vrp.c.jj 2018-12-07 00:27:25.419941079 +0100
+++ gcc/tree-vrp.c 2018-12-11 09:25:58.731750953 +0100
@@ -2894,6 +2894,7 @@ register_edge_assert_for_2 (tree name, e
{
name2 = gimple_assign_rhs1 (def_stmt);
if (CONVERT_EXPR_CODE_P (rhs_code)
+ && TREE_CODE (name2) == SSA_NAME
&& INTEGRAL_TYPE_P (TREE_TYPE (name2))
&& TYPE_UNSIGNED (TREE_TYPE (name2))
&& prec == TYPE_PRECISION (TREE_TYPE (name2))
@@ -2990,6 +2991,7 @@ register_edge_assert_for_2 (tree name, e
wide_int rmin, rmax;
tree rhs1 = gimple_assign_rhs1 (def_stmt);
if (INTEGRAL_TYPE_P (TREE_TYPE (rhs1))
+ && TREE_CODE (rhs1) == SSA_NAME
/* Make sure the relation preserves the upper/lower boundary of
the range conservatively. */
&& (comp_code == NE_EXPR
@@ -3054,6 +3056,7 @@ register_edge_assert_for_2 (tree name, e
{
names[1] = gimple_assign_rhs1 (def_stmt2);
if (!CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (def_stmt2))
+ || TREE_CODE (names[1]) != SSA_NAME
|| !INTEGRAL_TYPE_P (TREE_TYPE (names[1]))
|| (TYPE_PRECISION (TREE_TYPE (name2))
!= TYPE_PRECISION (TREE_TYPE (names[1]))))
@@ -3323,6 +3326,7 @@ register_edge_assert_for_1 (tree op, enu
conversion or conversion from non-integral type. */
tree rhs = gimple_assign_rhs1 (op_def);
if (INTEGRAL_TYPE_P (TREE_TYPE (rhs))
+ && TREE_CODE (rhs) == SSA_NAME
&& (TYPE_PRECISION (TREE_TYPE (rhs))
<= TYPE_PRECISION (TREE_TYPE (op))))
register_edge_assert_for_1 (rhs, code, e, asserts);
should fix this.
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Subject: [Bug target/88145] ICE: unrecognizable insn (mffs) targeting 32-bit BE FPU-less powerpc CPUs
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Tue Dec 11 08:30:36 2018
New Revision: 266973
URL: https://gcc.gnu.org/viewcvs?rev=266973&root=gcc&view=rev
Log:
rs6000: Don't use rs6000_isa_flags_explicit for soft float tests (PR88145)
...specifically, those for builtins. Soft float can be enabled
implicitly, too (for certain CPUs for example). We should use
rs6000_isa_flags instead, to decide whether to expand a builtin or
to bail out with an error instead.
PR target/88145
* config/rs6000/rs6000.c (rs6000_expand_zeroop_builtin): Use
rs6000_isa_flags instead of rs6000_isa_flags_explicit to decide
whether soft float is enabled.
(rs6000_expand_mtfsb_builtin): Ditto.
(rs6000_expand_set_fpscr_rn_builtin): Ditto.
(rs6000_expand_set_fpscr_drn_builtin): Ditto.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
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Subject: [Bug c++/88445] noexcept(expr) should return true with -fno-exceptions
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--- Comment #1 from Antony Polukhin <antoshkka at gmail dot com> ---
Hm... This was discussed in Clang and looks like such optimization could break
ABI and cause ODR violations https://bugs.llvm.org/show_bug.cgi?id=27442#c4
If nothing changed since then, I'm OK with closin this issue as Invalid or
Won't Fix.
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |ebotcazou at gcc dot gnu.org
--- Comment #16 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> (gdb) pt
> warning: Expression is not an assignment (and might have no effect)
> <record_type fa58ccc0
> system__tasking__protected_objects__operations__communication_block
> sizes-gimplified volatile visited type_2 BLK
The problem is here ^^^^^^^ I think, i.e. we have a volatile variant. The
problem may come from the Ada front-end, but it would be nice to have Jan's
viewpoint.
>From gcc-bugs-return-625444-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 08:40:17 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88446] New: __builtin_is_constant_evaluated rejects some converted constant expressions.
Date: Tue, 11 Dec 2018 08:40:00 -0000
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Bug ID: 88446
Summary: __builtin_is_constant_evaluated rejects some converted
constant expressions.
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
__builtin_is_constant_evaluated() is not a constant expression when used in
array bounds or new expressions.
// g++ -fsyntax-only -std=c++2a
char CA[__builtin_is_constant_evaluated()]; // rejects-valid
auto CP = new char[3][__builtin_is_constant_evaluated()]; // rejects-valid
>From gcc-bugs-return-625445-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 08:56:54 2018
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Subject: [Bug c++/88446] __builtin_is_constant_evaluated rejects some converted constant expressions.
Date: Tue, 11 Dec 2018 08:56:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-11
CC| |jason at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
And as Eric mentioned,
static_assert (__builtin_is_constant_evaluated ());
should not fail either.
I guess the array bounds including new are because GCC as an extension supports
VLAs (though sure, outside of function contexts we reject them anyway).
Jason, do you think we should handle these bounds with pretend_const_required
true to cxx_eval_outermost_constant_expr, like e.g. maybe_constant_init_1 with
pretend_const_required does?
>From gcc-bugs-return-625446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 08:58:47 2018
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Subject: [Bug target/88134] ICE in create_component_ref_by_pieces_1, at tree-ssa-pre.c:2520
Date: Tue, 11 Dec 2018 08:58:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I cannot reproduce it either, not with any version of powerpc-linux-gcc.
>From gcc-bugs-return-625447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 08:59:42 2018
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--- Comment #17 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> The problem is here ^^^^^^^ I think, i.e. we have a volatile variant. The
> problem may come from the Ada front-end, but it would be nice to have Jan's
> viewpoint.
It comes from libgnarl/s-tpobop.ads:
type Communication_Block is record
Self : Task_Id;
Enqueued : Boolean := True;
Cancelled : Boolean := False;
end record;
pragma Volatile (Communication_Block);
i.e. the declared type is volatile (but of course the main variant is not).
>From gcc-bugs-return-625448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 09:17:37 2018
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From: "mscfd at gmx dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88447] New: Non-contiguous array argument of some class not passed properly to subroutine
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88447
Bug ID: 88447
Summary: Non-contiguous array argument of some class not passed
properly to subroutine
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
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Priority: P3
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Using a non-contiguous argument to a subroutine whose declaration is "class(s),
dimension(:)" gives wrong results. The output looks like that some internal
offset in the array descriptor is computed wrongly. Using type(s) instead of
class(s) fixes the problem. The bug also occurs with the class(*) variant.
module mod
implicit none
private
public p, qi, qr, qv
type, public :: s
real, dimension(1:3) :: vec
end type s
type, public :: t
integer :: i
type(s) :: v
real :: r
end type t
contains
subroutine p(x)
class(*), dimension(:), intent(in) :: x
integer :: i
select type (x)
type is (integer)
write(*,'(a,*(i12))') 'x = ', x
type is (real)
write(*,'(a,*(f12.3))') 'x = ', x
type is (s)
write(*,'(a,*(3f12.3," |"))') 'x = ', (x(i)%vec, i=1,ubound(x,1))
end select
end subroutine p
subroutine qi(x)
integer, dimension(:), intent(in) :: x
write(*,'(a,*(i12))') 'x = ', x
end subroutine qi
subroutine qr(x)
real, dimension(:), intent(in) :: x
write(*,'(a,*(f12.3))') 'x = ', x
end subroutine qr
subroutine qv(x)
! with type(s) the bug does not occur
!type(s), dimension(:), intent(in) :: x
class(s), dimension(:), intent(in) :: x
integer :: i
write(*,'(a,*(3f12.3," |"))') 'x = ', (x(i)%vec, i=1,ubound(x,1))
end subroutine qv
end module mod
program noncontiguous
use mod
implicit none
integer :: k
type(t), dimension(1:4) :: a
do k = 1,4
a(k)%i = k
a(k)%r = 10.0 * 2.0*real(k)
a(k)%v%vec = [real(k)-2.0, real(k)-3.0, real(k)-5.0]
end do
! wrong output for all three calls
call p(a%i)
call p(a%r)
call p(a%v)
! correct output for the first and second call,
! wrong output for third call (correct if type(s) instead of class(s) is used)
call qi(a%i)
call qr(a%r)
call qv(a%v)
end program noncontiguous
>From gcc-bugs-return-625449-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 09:21:00 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88447] Non-contiguous array argument of some class not passed properly to subroutine
Date: Tue, 11 Dec 2018 09:21:00 -0000
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--- Comment #1 from martin <mscfd at gmx dot net> ---
Here is a smaller reproducer. The component "integer :: i" in type t is
necessary to reproduce the bug.
module mod
implicit none
private
public qv
type, public :: s
real, dimension(1:3) :: vec
end type s
type, public :: t
integer :: i
type(s) :: v
end type t
contains
subroutine qv(x)
class(s), dimension(:), intent(in) :: x
integer :: i
write(*,'(a,*(3f12.3," |"))') 'x = ', (x(i)%vec, i=1,ubound(x,1))
end subroutine qv
end module mod
program noncontiguous
use mod
implicit none
integer :: k
type(t), dimension(1:2) :: a
do k = 1,2
a(k)%i = k
a(k)%v%vec = [real(k)+1.0, real(k)+2.0, real(k)+3.0]
end do
call qv(a%v)
end program noncontiguous
>From gcc-bugs-return-625450-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 09:22:42 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88433] wrong code for printf after a pointer cast from a pointer to an adjacent object
Date: Tue, 11 Dec 2018 09:22:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |alias
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-11
Component|target |rtl-optimization
Depends on| |49330
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think this is a dup of the bug pointing to RTL alias analysis which cannot
properly distinguish between pointers and integers when following to base
terms.
We expand from
<bb 2> [local count: 1073741825]:
ix_5 = (long int) &x;
ix_6 = ix_5 + 4;
ix.1_1 = (int *) ix_6;
p = ix.1_1;
q = &y;
_14 = MEM[(char * {ref-all})&p];
_15 = MEM[(char * {ref-all})&q];
if (_14 == _15)
goto <bb 3>; [33.00%]
else
goto <bb 4>; [67.00%]
<bb 3> [local count: 354334802]:
*ix.1_1 = 11;
y.4_3 = y;
__builtin_printf ("%i", y.4_3); [tail call]
where RTL has plenty opportunity to track down ix.1_1 to &x + 4 which
makes it non-aliasing to y.
Note we are saved for f just beacuse of optimization propagating a
conditional equivalence p_5 == &y.
Dup of PR49330.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49330
[Bug 49330] Integer arithmetic on addresses optimised with pointer arithmetic
rules
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Subject: [Bug testsuite/88436] [9 regression] r265421 causes gcc.target/powerpc/pr54240.c to fail
Date: Tue, 11 Dec 2018 09:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yeah, can you simply change to dump/scan phiopt2 please?
>From gcc-bugs-return-625452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 09:28:22 2018
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Subject: [Bug tree-optimization/88440] size optimization of memcpy-like code
Date: Tue, 11 Dec 2018 09:28:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-11
CC| |mliska at suse dot cz,
| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think distributing patterns is reasonable for -O[2s]. I think we kept it at
-O3 because of compile-time concerns (dependence analysis is quadratic).
But then we still don't do basic vectorization at -O[2s] either... (same
compile-time for not too much gain issue).
So if somebody is willing to do some compile-time / effect numbers
(bootstrap / SPEC?) then we can consider enabling loop-distribute-patterns
for -O[2s] for GCC 10.
>From gcc-bugs-return-625453-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 09:31:15 2018
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Subject: [Bug c/88442] Misleading error message with duplicated struct definitions
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |RESOLVED
Known to work| |8.1.0
Resolution|--- |FIXED
Known to fail| |7.4.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This was fixed for GCC 8.
>From gcc-bugs-return-625454-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 09:31:25 2018
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Subject: [Bug tree-optimization/88443] [meta-bug] bogus/missing -Wstringop-overflow warnings
Date: Tue, 11 Dec 2018 09:31:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
.
>From gcc-bugs-return-625455-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 09:33:29 2018
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Subject: [Bug tree-optimization/88444] [9 Regression] ICE: tree check: expected ssa_name, have integer_cst in live_on_edge, at tree-vrp.c:468; or ICE: tree check: expected ssa_name, have integer_cst in get_value_range, at vr-values.c:84
Date: Tue, 11 Dec 2018 09:33:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
_22 = (long int) 0;
IMHO this is a bug, when IPA-CP propagates things we should fold the stmt.
This is probably done by the inliner remapping a SSA name to a constant?
It might be difficult to avoid folding all stmts but maybe we can detect
when we replace sth by a constant and mark the stmt for folding then.
Having
_22 = 0;
is OK.
>From gcc-bugs-return-625456-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 09:35:24 2018
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Subject: [Bug c++/88445] noexcept(expr) should return true with -fno-exceptions
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
We certainly cannot break the ABI with -fno-exceptions.
>From gcc-bugs-return-625457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 09:37:38 2018
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Subject: [Bug d/88431] link errors on build
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
This config line works fine:
../trunk/configure --prefix=/home/dcb/gcc/results.266950 \
--disable-multilib \
--disable-werror \
--enable-checking=df,extra,fold,rtl,yes \
--enable-languages=d
so it looks like using -O3 in the top level Makefile causes trouble.
>From gcc-bugs-return-625458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 09:40:21 2018
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
Date: Tue, 11 Dec 2018 09:40:00 -0000
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--- Comment #16 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #14)
> This is a duplicate of bug 87950, with most of the same discussion.
>
> *** This bug has been marked as a duplicate of bug 87950 ***
I think I need to add an "Enums 101" section to https://gcc.gnu.org/wiki/FAQ or
https://gcc.gnu.org/wiki/VerboseDiagnostics
>From gcc-bugs-return-625459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 09:43:46 2018
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Subject: [Bug middle-end/88448] New: [9 regression] gnat.dg/opt66.adb etc. FAIL
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Bug ID: 88448
Summary: [9 regression] gnat.dg/opt66.adb etc. FAIL
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
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Target Milestone: ---
Target: sparc-sun-solaris2.11, i386-pc-solaris2.11
Between 20181209 (r266930) and 20181210 (r266959), three Ada tests regressed:
+FAIL: cb4009a
cb4009a.adb: In function 'CB4009A.P2':
cb4009a.adb:114:5: error: BB 16 can not throw but has an EH edge
+===========================GNAT BUG DETECTED==============================+
| 9.0.0 20181210 (experimental) [trunk revision 266959] (i386-pc-solaris2.11)
GCC error:|
| verify_flow_info failed |
| Error detected around cb4009a.adb:114:5
[...]
raised TYPES.UNRECOVERABLE_ERROR : comperr.adb:407
gnatmake: "cb4009a.adb" compilation error
+FAIL: gnat.dg/opt66.adb (test for excess errors)
+FAIL: gnat.dg/opt66.adb 3 blank line(s) in output
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gnat.dg/opt66.adb: In function
'Opt66':
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gnat.dg/opt66.adb:13:4: error: BB 12
can not throw but has an EH edge
+===========================GNAT BUG DETECTED==============================+
| 9.0.0 20181210 (experimental) [trunk revision 266959] (i386-pc-solaris2.11)
GCC error:|
| verify_flow_info failed |
| Error detected around
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gnat.dg/opt66.adb:13:4|
[...]
raised TYPES.UNRECOVERABLE_ERROR : comperr.adb:407
gnatmake: "/vol/gcc/src/hg/trunk/local/gcc/testsuite/gnat.dg/opt66.adb"
compilation error
This might be from
2018-12-10 Richard Biener <rguenther@suse.de>
PR middle-end/88415
* gimple.c (gimple_assign_set_rhs_with_ops): Transfer EH
info to a newly allocated stmt.
* gcc.dg/gomp/pr88415.c: New testcase.
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Subject: [Bug middle-end/88448] [9 regression] gnat.dg/opt66.adb etc. FAIL
Date: Tue, 11 Dec 2018 09:44:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
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Subject: [Bug middle-end/88448] [9 regression] gnat.dg/opt66.adb etc. FAIL
Date: Tue, 11 Dec 2018 09:57:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yeah, likely. I'll have a look.
>From gcc-bugs-return-625462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 10:01:46 2018
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Subject: [Bug rtl-optimization/83377] Missed optimization (x86): Bit operations should be converted to arithmetic
Date: Tue, 11 Dec 2018 10:01:00 -0000
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--- Comment #3 from Vinay Kumar <vinay.m.engg at gmail dot com> ---
The below mentioned pattern match in match.pd generates the assembly code
similar to subtraction.
==========================================
diff --git a/gcc/match.pd b/gcc/match.pd
index fbb4d6f..3cde6a6 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -925,6 +925,11 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
(bit_and @0 integer_all_onesp)
(non_lvalue @0))
+/*Fold (x & ~CST) into (x - CST)*/
+(simplify(bit_and:c @0 INTEGER_CST@1)
+(if ((INTEGRAL_TYPE_P (type) || VECTOR_INTEGER_TYPE_P (type)))
+ (minus @0 (negate @1))))
+
/* x & x -> x, x | x -> x */
(for bitop (bit_and bit_ior)
(simplify
==========================================
Assembly generated is as follows:
==========================================
test.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <b>:
0: 48 83 ff fe cmp $0xfffffffffffffffe,%rdi
4: 74 04 je a <b+0xa>
6: 48 8b 7f fd mov -0x3(%rdi),%rdi
a: e9 00 00 00 00 jmpq f <b+0xf>
f: 90 nop
0000000000000010 <c>:
10: 48 83 ff fe cmp $0xfffffffffffffffe,%rdi
14: 74 04 je 1a <c+0xa>
16: 48 8b 7f fe mov -0x2(%rdi),%rdi
1a: e9 00 00 00 00 jmpq 1f <c+0xf>
==========================================
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Subject: [Bug target/88134] ICE in create_component_ref_by_pieces_1, at tree-ssa-pre.c:2520
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--- Comment #8 from Arseny Solokha <asolokha at gmx dot com> ---
Aha. Segher, you've helpfully reminded me about -msoft-float w/ your recent
commit. So it's not (solely) my misconfiguration once again:
https://gcc.godbolt.org/z/sshcIF
(it's g++, because gcc for powerpc seems to be broken there; -O1 -ftree-pre
instead of -O2, because it's the pass that actually fails; and 1.0 instead of
__builtin_huge_val (), because value the second operand doesn't really seem to
matter).
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Subject: [Bug lto/86004] [9 regression] Several lto test cases begin failing with r260963
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--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Dec 11 10:28:39 2018
New Revision: 266974
URL: https://gcc.gnu.org/viewcvs?rev=266974&root=gcc&view=rev
Log:
PR lto/86004
* doc/sourcebuild.texi (lto_incremental): Document new effective
target.
* lib/target-supports.exp (check_effective_target_lto_incremental):
New.
* g++.dg/lto/pr69137_0.C: Require lto_incremental effective target.
* g++.dg/lto/pr65316_0.C: Likewise.
* g++.dg/lto/pr85176_0.C: Likewise.
* g++.dg/lto/pr79000_0.C: Likewise.
* g++.dg/lto/pr66180_0.C: Likewise.
* g++.dg/lto/pr65193_0.C: Likewise.
* g++.dg/lto/pr69077_0.C: Likewise.
* g++.dg/lto/pr68057_0.C: Likewise.
* g++.dg/lto/pr66705_0.C: Likewise.
* g++.dg/lto/pr65302_0.C: Likewise.
* g++.dg/lto/20091002-1_0.C: Likewise.
* g++.dg/lto/pr81940_0.C: Likewise.
* g++.dg/lto/pr64043_0.C: Likewise.
* g++.dg/lto/pr65549_0.C: Likewise.
* g++.dg/lto/pr69133_0.C: Likewise.
* gfortran.dg/lto/pr79108_0.f90: Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/sourcebuild.texi
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/lto/20091002-1_0.C
trunk/gcc/testsuite/g++.dg/lto/pr64043_0.C
trunk/gcc/testsuite/g++.dg/lto/pr65193_0.C
trunk/gcc/testsuite/g++.dg/lto/pr65302_0.C
trunk/gcc/testsuite/g++.dg/lto/pr65316_0.C
trunk/gcc/testsuite/g++.dg/lto/pr65549_0.C
trunk/gcc/testsuite/g++.dg/lto/pr66180_0.C
trunk/gcc/testsuite/g++.dg/lto/pr66705_0.C
trunk/gcc/testsuite/g++.dg/lto/pr68057_0.C
trunk/gcc/testsuite/g++.dg/lto/pr69077_0.C
trunk/gcc/testsuite/g++.dg/lto/pr69133_0.C
trunk/gcc/testsuite/g++.dg/lto/pr69137_0.C
trunk/gcc/testsuite/g++.dg/lto/pr79000_0.C
trunk/gcc/testsuite/g++.dg/lto/pr81940_0.C
trunk/gcc/testsuite/g++.dg/lto/pr85176_0.C
trunk/gcc/testsuite/gfortran.dg/lto/pr79108_0.f90
trunk/gcc/testsuite/lib/target-supports.exp
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Subject: [Bug fortran/88447] Non-contiguous array argument of some class not passed properly to subroutine
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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 6.4 up to trunk (9.0). With 5.5.0 I get at run time
At line 24 of file pr88447_1.f90 (unit = 6, file = 'stdout')
Fortran runtime error: '*' requires at least one associated data descriptor
(a,*(3f12.3," |"))
^
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Subject: [Bug target/88134] ICE in create_component_ref_by_pieces_1, at tree-ssa-pre.c:2520
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--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I cannot get that to fail either, with a trunk compiler :-/
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Subject: [Bug fortran/88438] [F08] A pointer function reference can denote a variable in any variable definition context.
Date: Tue, 11 Dec 2018 10:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88438
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-11
Summary|A pointer function |[F08] A pointer function
|reference can denote a |reference can denote a
|variable in any variable |variable in any variable
|definition context. |definition context.
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
At https://gcc.gnu.org/wiki/Fortran2008Status I see
Unimplemented features -- based on the list in the "Introduction" of the F2008
standard
...
A pointer function reference can denote a variable in any variable definition
context.
...
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--- Comment #10 from Arseny Solokha <asolokha at gmx dot com> ---
Could your r266973 fix a root cause of this issue?
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--- Comment #11 from Segher Boessenkool <segher at gcc dot gnu.org> ---
AT12.0 however, like on godbolt, does in fact crash.
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--- Comment #12 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 11 Dec 2018, asolokha at gmx dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88134
>
> --- Comment #10 from Arseny Solokha <asolokha at gmx dot com> ---
> Could your r266973 fix a root cause of this issue?
Unlikely. I don't see how this assert can fire...
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Subject: [Bug target/88134] ICE in create_component_ref_by_pieces_1, at tree-ssa-pre.c:2520
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--- Comment #13 from Arseny Solokha <asolokha at gmx dot com> ---
In decl_address_invariant_p() we hit this break:
3423 case VAR_DECL:
3424 if ((TREE_STATIC (op) || DECL_EXTERNAL (op))
3425 || DECL_THREAD_LOCAL_P (op)
3426 || DECL_CONTEXT (op) == current_function_decl
3427 || decl_function_context (op) == current_function_decl)
3428 return true;
3429 break;
and return false, which in the end becomes what is_gimple_min_invariant()
returns. I can provide relevant dumps or gdb session printouts if so desired.
At first glance I didn't notice anything glaringly wrong there, but admittedly
I have no idea what to look at.
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Subject: [Bug libstdc++/88204] New test case 26_numerics/complex/operators/more_constexpr.cc from r266416 fails
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Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc64*-*-* |powerpc64*-*-*,powerpc-*-ai
| |x,powerpc*-*-darwin9
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-11
CC| |iains at gcc dot gnu.org
Depends on| |27964, 19779
Ever confirmed|0 |1
--- Comment #1 from Iain Sandoe <iains at gcc dot gnu.org> ---
also on AIX and Darwin
this looks to be the long-standing problem of no constant folding for IBM long
doubles on powerpc platforms that use them.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19779
[Bug 19779] IBM 128bit long double format is not constant folded.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=27964
[Bug 27964] Wrong line ends on windows (XP)
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Subject: [Bug c++/88449] New: __builtin_is_constant_evaluated misbehaves due to constexpr call caching
Date: Tue, 11 Dec 2018 11:10:00 -0000
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Bug ID: 88449
Summary: __builtin_is_constant_evaluated misbehaves due to
constexpr call caching
Product: gcc
Version: 9.0
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The is-constant-evaluated1.C testcase when
constexpr inline bool
is_constant_evaluated () noexcept
{
return __builtin_is_constant_evaluated ();
}
is added and all other __builtin_is_constant_evaluated calls are changed to
is_constant_evaluated fails (if it is made dg-do run) due to C++ constexpr call
caching.
Either we can just use the ctx->pretend_constant_evaluated as another
"argument" for the caching purposes (as the patch I'm going to attach does), or
we could do something smarter (remember during constexpr evaluation whether any
__builtin_is_constant_evaluated calls were seen), remember that in the context
and use a tri-state in the constexpr_call hash table - not seen,
pretend_constant_evaluated true or false. But we'd need to make sure we
propagate it to all the callers right, if it is in the constexpr context,
anytime we create a new context we'd need to or it back afterwards.
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--- Comment #14 from Segher Boessenkool <segher at gcc dot gnu.org> ---
And none of the compilers I built crash. (Most have checking enabled, but some
not, so that's not it either).
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Subject: [Bug c++/88449] __builtin_is_constant_evaluated misbehaves due to constexpr call caching
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-12-11
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45205
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45205&action=edit
gcc9-pr88449.patch
Untested fix.
>From gcc-bugs-return-625476-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 11:26:53 2018
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From: "rearnsha at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87369] [9 Regression] Regression on aarch64/copysign-bsl.c since r264264
Date: Tue, 11 Dec 2018 11:26:00 -0000
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--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Author: rearnsha
Date: Tue Dec 11 11:26:15 2018
New Revision: 267019
URL: https://gcc.gnu.org/viewcvs?rev=267019&root=gcc&view=rev
Log:
[aarch64] PR target/87369 Prefer bsl/bit/bif for copysign
The copysign operations will almost always be performed on values in
floating-point registers. As such, we do not want the compiler to
simplify the operations into code sequences that can only be done
using the general-purpose register set. Unfortunately, this is what
is currently happening.
Fortunately, it seems quite unlikely that copysign() will be
subsequently followed by other logical operations on the values
involved, so I think it is acceptable to use an unspec here. This
allows us to preserve the operation in a form that allows the register
allocator to make the right choice later on, without limitation on the
final form of the operation (well, if we do end up using the gp
register bank, we get a dead constant load that we cannot easily
eliminate at a late stage).
PR target/37369
* config/aarch64/iterators.md (sizem1): Add sizes for SFmode and
DFmode.
(Vbtype): Add SFmode mapping.
* config/aarch64/aarch64.md (copysigndf3, copysignsf3): Delete.
(copysign<GPF:mode>3): New expand pattern.
(copysign<GPF:mode>3_insn): New insn pattern.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64.md
trunk/gcc/config/aarch64/iterators.md
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Subject: [Bug c/37369] ice for legal C code
Date: Tue, 11 Dec 2018 11:26:00 -0000
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--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Author: rearnsha
Date: Tue Dec 11 11:26:15 2018
New Revision: 267019
URL: https://gcc.gnu.org/viewcvs?rev=267019&root=gcc&view=rev
Log:
[aarch64] PR target/87369 Prefer bsl/bit/bif for copysign
The copysign operations will almost always be performed on values in
floating-point registers. As such, we do not want the compiler to
simplify the operations into code sequences that can only be done
using the general-purpose register set. Unfortunately, this is what
is currently happening.
Fortunately, it seems quite unlikely that copysign() will be
subsequently followed by other logical operations on the values
involved, so I think it is acceptable to use an unspec here. This
allows us to preserve the operation in a form that allows the register
allocator to make the right choice later on, without limitation on the
final form of the operation (well, if we do end up using the gp
register bank, we get a dead constant load that we cannot easily
eliminate at a late stage).
PR target/37369
* config/aarch64/iterators.md (sizem1): Add sizes for SFmode and
DFmode.
(Vbtype): Add SFmode mapping.
* config/aarch64/aarch64.md (copysigndf3, copysignsf3): Delete.
(copysign<GPF:mode>3): New expand pattern.
(copysign<GPF:mode>3_insn): New insn pattern.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64.md
trunk/gcc/config/aarch64/iterators.md
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Subject: [Bug target/87369] [9 Regression] Regression on aarch64/copysign-bsl.c since r264264
Date: Tue, 11 Dec 2018 11:36:00 -0000
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
It seems better to fix this by using an unspec that's specific to the copysign
expansion. That means we don't need to nobble the other optimizations the
compiler might do on bit-field manipulations. It's unlikely that copysign will
be followed by other bit-manipulating operations on a FP value, but we'll just
have to live with that if they are.
>From gcc-bugs-return-625479-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 11:37:06 2018
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Subject: [Bug libstdc++/84949] -ffast-math bugged with respect to NaNs
Date: Tue, 11 Dec 2018 11:37:00 -0000
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Matthias Kretz <kretz at kde dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kretz at kde dot org
--- Comment #6 from Matthias Kretz <kretz at kde dot org> ---
I'd like to make a case for numeric_limits<floating-point>::is_iec559 to follow
__STDC_IEC_559__. I.e. the following patch:
--- a/libstdc++-v3/include/std/limits
+++ b/libstdc++-v3/include/std/limits
@@ -1649,7 +1649,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
denorm_min() _GLIBCXX_USE_NOEXCEPT { return __FLT_DENORM_MIN__; }
static _GLIBCXX_USE_CONSTEXPR bool is_iec559
+#ifdef __STDC_IEC_559__
= has_infinity && has_quiet_NaN && has_denorm == denorm_present;
+#else
+ = false;
+#endif
static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true;
static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false;
@@ -1724,7 +1728,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
denorm_min() _GLIBCXX_USE_NOEXCEPT { return __DBL_DENORM_MIN__; }
static _GLIBCXX_USE_CONSTEXPR bool is_iec559
+#ifdef __STDC_IEC_559__
= has_infinity && has_quiet_NaN && has_denorm == denorm_present;
+#else
+ = false;
+#endif
static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true;
static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false;
@@ -1799,7 +1807,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
denorm_min() _GLIBCXX_USE_NOEXCEPT { return __LDBL_DENORM_MIN__; }
static _GLIBCXX_USE_CONSTEXPR bool is_iec559
+#ifdef __STDC_IEC_559__
= has_infinity && has_quiet_NaN && has_denorm == denorm_present;
+#else
+ = false;
+#endif
static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true;
static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false;
The __STDC_IEC_559__ macro is not defined when -ffast-math is active. is_iec559
requires "true if and only if the type adheres to ISO/IEC/IEEE 60559". I don't
have IEC559 at hand, but I believe assuming no NaN, inf, or -0 can occur makes
the floating point types not adhere to IEC559.
And IIUC, if __STDC_IEC_559__ is defined, then has_infinity, has_quiet_NaN and
has_denorm must all be true. So
+#ifdef __STDC_IEC_559__
+ = true;
+#else
+ = false;
+#endif
should be correct.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/84949] -ffast-math bugged with respect to NaNs
Date: Tue, 11 Dec 2018 11:41:00 -0000
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--- Comment #7 from Matthias Kretz <kretz at kde dot org> ---
Example showing the discrepancy: https://godbolt.org/z/D15m71
Also PR83875 is relevant wrt. giving different answers depending on function
attributes.
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-11
CC| |segher at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Ah yes, I had release checking there. Confirmed.
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Subject: [Bug other/88409] [9 Regression] FAIL at line 4429, options --format=gnu-v3:
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--- Comment #8 from Nick Clifton <nickc at gcc dot gnu.org> ---
Author: nickc
Date: Tue Dec 11 11:59:53 2018
New Revision: 267020
URL: https://gcc.gnu.org/viewcvs?rev=267020&root=gcc&view=rev
Log:
Fix a failure in the libiberty testsuite by increasing the demangle recursion
limit to 2048.
PR 88409
* demangle.h (DEMANGLE_RECURSION_LIMIT): Increase to 2048.
Modified:
trunk/include/ChangeLog
trunk/include/demangle.h
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Subject: [Bug other/88409] [9 Regression] FAIL at line 4429, options --format=gnu-v3:
Date: Tue, 11 Dec 2018 12:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88409
Nick Clifton <nickc at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Nick Clifton <nickc at gcc dot gnu.org> ---
fixed by increasing the recursion limit to 2048.
>From gcc-bugs-return-625484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 13:01:44 2018
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Subject: [Bug tree-optimization/88415] [7/8 Regression] ICE: verify_gimple failed (error: dead STMT in EH table)
Date: Tue, 11 Dec 2018 13:01:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Dec 11 13:00:49 2018
New Revision: 267021
URL: https://gcc.gnu.org/viewcvs?rev=267021&root=gcc&view=rev
Log:
2018-12-11 Richard Biener <rguenther@suse.de>
PR middle-end/88448
PR middle-end/88415
* gimple.c (gimple_assign_set_rhs_with_ops): Revert previous
change.
* tree-complex.c (update_complex_assignment): Properly transfer
or clean EH info around gimple_assign_set_rhs_with_ops.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple.c
trunk/gcc/tree-complex.c
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Subject: [Bug middle-end/88448] [9 regression] gnat.dg/opt66.adb etc. FAIL
Date: Tue, 11 Dec 2018 13:01:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Dec 11 13:00:49 2018
New Revision: 267021
URL: https://gcc.gnu.org/viewcvs?rev=267021&root=gcc&view=rev
Log:
2018-12-11 Richard Biener <rguenther@suse.de>
PR middle-end/88448
PR middle-end/88415
* gimple.c (gimple_assign_set_rhs_with_ops): Revert previous
change.
* tree-complex.c (update_complex_assignment): Properly transfer
or clean EH info around gimple_assign_set_rhs_with_ops.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple.c
trunk/gcc/tree-complex.c
>From gcc-bugs-return-625486-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 13:06:39 2018
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Subject: [Bug tree-optimization/86637] [9 Regression] ICE: tree check: expected block, have <invalid tree code> in inlining_chain_to_json, at optinfo-emit-json.cc:293
Date: Tue, 11 Dec 2018 13:06:00 -0000
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--- Comment #11 from Arseny Solokha <asolokha at gmx dot com> ---
Can this PR be closed now, or are there some issues left?
>From gcc-bugs-return-625487-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 13:37:38 2018
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Subject: [Bug bootstrap/88450] New: ICE in stage 2 compiler while configuring libgcc
Date: Tue, 11 Dec 2018 13:37:00 -0000
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Bug ID: 88450
Summary: ICE in stage 2 compiler while configuring libgcc
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
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Created attachment 45206
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45206&action=edit
main config.log
Bootstrap fails under Win10 at configuring libgcc in stage2 with
x86_64-w64-mingw32 host/target. Bootstraps succeeds with 9-20181118 snapshot
with same configuration/toolchain and fails at the same point with later
snapshots.
Host: win10, mingw64 with gcc 8.1 + msys2
configure:3745: checking for suffix of object files
configure:3767: /c/data/gcc9_b/./gcc/xgcc -B/c/data/gcc9_b/./gcc/
-L/usr/x86_64-w64-mingw32/lib -L/usr/mingw/lib -isystem
/usr/x86_64-w64-mingw32/include -isystem /usr/mingw/include
-B/usr/x86_64-w64-mingw32/bin/ -B/usr/x86_64-w64-mingw32/lib/ -isystem
/usr/x86_64-w64-mingw32/include -isystem /usr/x86_64-w64-mingw32/sys-include
-fno-checking -c -g -O2 -pipe -fno-ident conftest.c >&5
conftest.c: In function 'main':
conftest.c:15:3: internal compiler error: Segmentation fault
15 | return 0;
| ^~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://sourceforge.net/projects/mingw-w64> for instructions.
configure:3771: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "GNU C Runtime Library"
| #define PACKAGE_TARNAME "libgcc"
| #define PACKAGE_VERSION "1.0"
| #define PACKAGE_STRING "GNU C Runtime Library 1.0"
| #define PACKAGE_BUGREPORT ""
| #define PACKAGE_URL "http://www.gnu.org/software/libgcc/"
| /* end confdefs.h. */
|
| int
| main ()
| {
|
| ;
| return 0;
| }
configure:3785: error: in `/c/data/gcc9_b/x86_64-w64-mingw32/libgcc':
configure:3787: error: cannot compute suffix of object files: cannot compile
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Subject: [Bug lto/86004] [9 regression] Several lto test cases begin failing with r260963
Date: Tue, 11 Dec 2018 13:41:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/88446] __builtin_is_constant_evaluated rejects some converted constant expressions.
Date: Tue, 11 Dec 2018 13:41:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45207
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45207&action=edit
gcc9-pr88446.patch
Untested fix for the array type dimensions.
>From gcc-bugs-return-625490-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 13:43:37 2018
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Subject: [Bug c++/88446] __builtin_is_constant_evaluated rejects some converted constant expressions.
Date: Tue, 11 Dec 2018 13:43:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The static_assert bug is related to PR86524.
>From gcc-bugs-return-625491-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 13:52:22 2018
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Subject: [Bug sanitizer/88426] [8/9 Regression] Compiler crash if use special code with command line switch -fsanitize=float-cast-overflow
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88426
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Dec 11 13:51:44 2018
New Revision: 267022
URL: https://gcc.gnu.org/viewcvs?rev=267022&root=gcc&view=rev
Log:
PR sanitizer/88426
* c-convert.c (convert): Call c_fully_fold before calling
ubsan_instrument_float_cast.
* c-c++-common/ubsan/float-cast-overflow-11.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/ubsan/float-cast-overflow-11.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-convert.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-625492-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 13:53:02 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/88426] [8 Regression] Compiler crash if use special code with command line switch -fsanitize=float-cast-overflow
Date: Tue, 11 Dec 2018 13:53:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] Compiler |[8 Regression] Compiler
|crash if use special code |crash if use special code
|with command line switch |with command line switch
|-fsanitize=float-cast-overf |-fsanitize=float-cast-overf
|low |low
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-625493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 13:53:31 2018
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From: "mantas.mikaitis at manchester dot ac.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88451] New: No rounding in fixed-point arithmetic (Decimal to fixed-point conversion, multiplication)
Date: Tue, 11 Dec 2018 13:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88451
Bug ID: 88451
Summary: No rounding in fixed-point arithmetic (Decimal to
fixed-point conversion, multiplication)
Product: gcc
Version: 6.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: mantas.mikaitis at manchester dot ac.uk
Target Milestone: ---
Hello,
This bug report is about that there is no rounding in various parts of the
fixed-point arithmetic. Here are some cases run on ARM968:
1)
accum x = 0.04k; // This ends up as 0.03997802734375.
————————
2)
double x = 0.04;
accum y = x; // This ends up as 0.03997802734375.
————————
As you can notice, 0.04 is rounded down to 0.03997802734375, however, the
nearest accum to the 0.04 is 0.040008544921875.
3)
Multiplication of two accums results in a 63-bit value which needs to be
shifted right to put the result back to the accum type. Upon a shift, there is
no rounding and 15 bottom bits are truncated.
————————
It seems to be doing binary truncation instead of rounding, which is also
mathematically legal operation, but introduces a larger error. Looking into the
ISO draft standard for fixed-point arithmetic, it specifies that
FX_FULL_PRECISION pragma can be used to obtain full precision:
http://www.open-std.org/jtc1/sc22/wg14/www/docs/n968.pdf, but it seems to have
no effect when I turn it on.
I am working with gcc version 6.3.1 20170620 (release) [ARM/embedded-6-branch
revision 249437] (GNU MCU Eclipse ARM Embedded GCC, 64-bits).
Many thanks,
Mantas M.
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Subject: =?UTF-8?B?W0J1ZyBpcGEvODc5NTddIFs5IFJlZ3Jlc3Npb25dIElDRSB0cmVlIGNoZWNr?= =?UTF-8?B?OiBleHBlY3RlZCB0cmVlIHRoYXQgY29udGFpbnMg4oCYZGVjbCBtaW5pbWFs?= =?UTF-8?B?4oCZIHN0cnVjdHVyZSwgaGF2ZSDigJhpZGVudGlmaWVyX25vZGXigJkgaW4g?= =?UTF-8?B?d2Fybl9vZHIsIGF0IGlwYS1kZXZpcnQuYzoxMDUxIHNpbmNlIHIyNjU1MTk=?Date: Tue, 11 Dec 2018 13:54:00 -0000
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--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I guess the middle-end relies on TYPE_NAME to have the TYPE_MAIN_VARIANT type
rather than be qualified. The question if just here and it is possible to cope
with that, or elsewhere too.
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Subject: [Bug fortran/88452] New: gfortran (Gentoo 8.2.0-r5 p1.6) 8.2.0 reports internal error
Date: Tue, 11 Dec 2018 14:00:00 -0000
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Bug ID: 88452
Summary: gfortran (Gentoo 8.2.0-r5 p1.6) 8.2.0 reports internal
error
Product: gcc
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Created attachment 45208
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45208&action=edit
source file triggering the bug
GNU Fortran (Gentoo 8.2.0-r5 p1.6) 8.2.0 reported:
> gfortran foo.F
f951: internal compiler error: get_mpz(): Not an integer constant
Please submit a full bug report,
with preprocessed source if appropriate.
The stripped source code reproducing the bug is attached.
It is due to an equivalence declaration, when commented out
the ICE disappears.
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Subject: [Bug rtl-optimization/88416] [8/9 Regression] ICE in in df_uses_record, at df-scan.c:3013
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45209
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45209&action=edit
gcc9-pr88416.patch
Untested fix. The problem are targets like x86 which are not AUTO_INC_DEC, but
still have some patterns that use those expressions (pushes/pops).
As for !AUTO_INC_DEC we just called copy_rtx which does pretty much the same
copying/walking as cleanup_auto_inc_dec, except that the latter will handle
those properly, I think the best fix is just to never use copy_rtx here.
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Subject: [Bug target/88425] suboptimal code for a<imm?-1:0
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Dec 11 14:50:22 2018
New Revision: 267023
URL: https://gcc.gnu.org/viewcvs?rev=267023&root=gcc&view=rev
Log:
PR target/88425
* config/i386/i386.md (*x86_mov<SWI48:mode>cc_0_m1_neg_leu<SWI:mode>):
New define_insn_and_split.
* gcc.target/i386/pr88425.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr88425.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
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Created attachment 45210
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proposed patch
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Claudiu: could you test that patch please? (On the real thing, not just
this testcase :-) )
>From gcc-bugs-return-625500-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 15:07:08 2018
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #14 from Jason Merrill <jason at gcc dot gnu.org> ---
It would certainly be possible to recognize this situation (all enumerators
handled) and suppress the -Wreturn-type warning even though we can't in general
assume that we can't get other values of the enumeration. With the ability to
explicitly request warnings in this situation with another flag. I don't know
how much work that would be.
>From gcc-bugs-return-625501-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 15:09:34 2018
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Subject: [Bug c++/86049] Array bindings are not const when initializer is
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Tomalak Geret'kal <tom at kera dot name> changed:
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--- Comment #3 from Tomalak Geret'kal <tom at kera dot name> ---
I disagree and think that Clang is wrong.
The top-level qualifiers of T (the type of One) should be "cv", and cv is "the
cv-qualifiers in the decl-specifier-seq". The decl-specifier-seq is "auto", not
"const auto". That "auto" will infer "const int" doesn't seem to be relevant.
Discussion on https://stackoverflow.com/q/53726135/560648.
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From: "ldionne.2 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88453] New: GCC pretends that constexpr default-constructible type is nothrow constructible
Date: Tue, 11 Dec 2018 15:25:00 -0000
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Bug ID: 88453
Summary: GCC pretends that constexpr default-constructible type
is nothrow constructible
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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The following code does not compile with GCC trunk:
------------------------------------------------------------
#include <type_traits>
struct Throwing {
constexpr Throwing() {}
};
static_assert(!std::is_nothrow_default_constructible<Throwing>::value, "");
------------------------------------------------------------
It seems like GCC assumes that the default constructor is noexcept since it is
constexpr. Clang does not have this behaviour, and I believe Clang to be
correct in this case.
Live example: https://wandbox.org/permlink/1z1qYQSUDWsYJda1
>From gcc-bugs-return-625503-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 15:31:14 2018
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Subject: [Bug c++/86049] Array bindings are not const when initializer is
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Richard, do you know if there's an issue for this yet?
>From gcc-bugs-return-625505-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 15:50:52 2018
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Subject: [Bug c++/87603] [C++17] noexcept isn't special cased for constant expressions anymore
Date: Tue, 11 Dec 2018 15:50:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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CC| |ldionne.2 at gmail dot com
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 88453 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-625504-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 15:50:51 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88453] GCC pretends that constexpr default-constructible type is nothrow constructible
Date: Tue, 11 Dec 2018 15:50:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this is another manifestation of PR 87603
*** This bug has been marked as a duplicate of bug 87603 ***
>From gcc-bugs-return-625506-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 16:13:05 2018
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Subject: =?UTF-8?B?W0J1ZyBpcGEvODc5NTddIFs5IFJlZ3Jlc3Npb25dIElDRSB0cmVlIGNoZWNr?= =?UTF-8?B?OiBleHBlY3RlZCB0cmVlIHRoYXQgY29udGFpbnMg4oCYZGVjbCBtaW5pbWFs?= =?UTF-8?B?4oCZIHN0cnVjdHVyZSwgaGF2ZSDigJhpZGVudGlmaWVyX25vZGXigJkgaW4g?= =?UTF-8?B?d2Fybl9vZHIsIGF0IGlwYS1kZXZpcnQuYzoxMDUxIHNpbmNlIHIyNjU1MTk=?Date: Tue, 11 Dec 2018 16:13:00 -0000
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--- Comment #19 from Jan Hubicka <hubicka at ucw dot cz> ---
Yeap, the warnings was written at the time all C++ types had TYPE_NAMEs
and other types used IDENTIFIER_NODE. I have chnaged it for memory use
reaosns so only main variants have IDENTIFIER_NODE. Usually we want to
just look for main variant and complain about that. I will look into
it.
Honza
>From gcc-bugs-return-625507-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 16:14:19 2018
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Subject: [Bug fortran/88452] gfortran (Gentoo 8.2.0-r5 p1.6) 8.2.0 reports internal error
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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CC| |kargl at gcc dot gnu.org
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--- Comment #1 from kargl at gcc dot gnu.org ---
Reduced testcase.
subroutine tccdenom(n1,n2)
implicit none
integer n1, n2
real tt1(n1,n2)
complex ctt1(n1,n2)
equivalence(tt1(1,1), ctt1(1,1))
end
Workaround is to remove the dimension in the equivalence statement.
This compiles
subroutine tccdenom(n1,n2)
implicit none
integer n1, n2
real tt1(n1,n2)
complex ctt1(n1,n2)
equivalence(tt1, ctt1)
end
>From gcc-bugs-return-625508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 16:46:35 2018
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Subject: [Bug testsuite/88454] New: [9 regression] test case gcc.dg/tree-ssa/split-path-5.c fails after r266971
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88454
Bug ID: 88454
Summary: [9 regression] test case
gcc.dg/tree-ssa/split-path-5.c fails after r266971
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
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Reporter: seurer at gcc dot gnu.org
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spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/tree-ssa/split-path-5.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -O2 -fsplit-paths -fdump-tree-split-paths-details -w
-S -o split-path-5.s
PASS: gcc.dg/tree-ssa/split-path-5.c (test for excess errors)
gcc.dg/tree-ssa/split-path-5.c: pattern found 0 times
FAIL: gcc.dg/tree-ssa/split-path-5.c scan-tree-dump-times split-paths "join
point for if-convertable half-diamond" 1
testcase /home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/tree-ssa/tree-ssa.exp
completed in 0 seconds
=== gcc Summary ===
# of expected passes 1
# of unexpected failures 1
r266971 | law | 2018-12-10 22:56:54 -0600 (Mon, 10 Dec 2018) | 6 lines
PR tree-optimization/80520
* gimple-ssa-split-paths.c (is_feasible_trace): Recognize half
diamonds that are likely if convertable.
* gcc.dg/tree-ssa/split-path-5.c: Update expected output.
* gcc.dg/tree-ssa/split-path-11.c: New test.
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Subject: [Bug c++/88434] operator< should take precedence over template argument in basic.lookup.classref
Date: Tue, 11 Dec 2018 16:51:00 -0000
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--- Comment #2 from Andrew Giese <gieseanw+gcc at gmail dot com> ---
It appears there is a CWG issue for this:
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#1835
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Subject: [Bug c++/88375] Vague source location for bad initialization
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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>From gcc-bugs-return-625511-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 17:07:46 2018
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Subject: [Bug testsuite/88454] [9 regression] test case gcc.dg/tree-ssa/split-path-5.c fails after r266971
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
On i686-linux I get:
FAIL: gcc.dg/tree-ssa/split-path-11.c scan-tree-dump-times split-paths "join
point for if-convertable half-diamond" 1
on x86_64-linux it passes.
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Subject: [Bug tree-optimization/88444] [9 Regression] ICE: tree check: expected ssa_name, have integer_cst in live_on_edge, at tree-vrp.c:468; or ICE: tree check: expected ssa_name, have integer_cst in get_value_range, at vr-values.c:84
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Dec 11 17:16:48 2018
New Revision: 267026
URL: https://gcc.gnu.org/viewcvs?rev=267026&root=gcc&view=rev
Log:
PR tree-optimization/88444
* tree-vrp.c (register_edge_assert_for_2): Only register assertions
for conversions if rhs1 is a SSA_NAME.
* gcc.dg/pr88444.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr88444.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c
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Subject: [Bug ada/88429] Ada bootstrap fails with --disable-shared
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Unlike the default (--enable-shared) case, it seems that the rts directory
> for the non-default multilib is created incorrectly: with --enable-shared, I see
>
> make THREAD_KIND=native setup-rts
> make[9]: Entering directory
> '/var/scratch/gcc/regression/trunk/4.17.3-gcc-gas-gld/build/gcc/ada'
> rm -rf rts_32
> mkdir -p rts_32
> chmod u+w rts_32
>
> while with --disable-shared, I get the creation of rts twice.
>
> This may be related to libada/configure.ac referencing a gnatlib-plain
> target for --disable-shared, which I couldn't find elsewhere.
Yes, but I don't understand why this doesn't fail in the default case too...
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Subject: [Bug ada/88429] Ada bootstrap fails with --disable-shared
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixing.
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--- Comment #20 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> I guess the middle-end relies on TYPE_NAME to have the TYPE_MAIN_VARIANT
> type rather than be qualified. The question if just here and it is possible
> to cope with that, or elsewhere too.
Yes, but only here and only for a couple of weeks, i.e. it's a novelty.
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Subject: [Bug target/88435] Compiling with optimizations causes the compiler to fail.
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Mattis Lind <mattis at mattisborgen dot se> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Mattis Lind <mattis at mattisborgen dot se> ---
I can confirm that latest 9.0 doesn't have this problem.
>From gcc-bugs-return-625517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 18:44:15 2018
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Subject: [Bug c++/88434] operator< should take precedence over template argument in basic.lookup.classref
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Since the CWG issue is still "drafting", should we be making any changes at
this time?
>From gcc-bugs-return-625518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 18:46:54 2018
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Subject: [Bug c++/88434] [DR1835] operator< should take precedence over template argument in basic.lookup.classref
Date: Tue, 11 Dec 2018 18:46:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Suspecting until the Defect report is resolved.
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Subject: [Bug c++/86608] [7/8/9 Regression] volatile variable is taken as a constexpr
Date: Tue, 11 Dec 2018 18:53:00 -0000
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Dec 11 18:53:03 2018
New Revision: 267030
URL: https://gcc.gnu.org/viewcvs?rev=267030&root=gcc&view=rev
Log:
PR c++/86608 - reading constexpr volatile variable.
* constexpr.c (potential_constant_expression_1): Check want_rval
instead of checking if we have a decl.
* decl2.c (decl_maybe_constant_var_p): Don't consider volatile
constexpr variables as maybe constant.
* g++.dg/cpp0x/constexpr-volatile2.C: New test.
* g++.dg/cpp0x/pr65327.C: Add dg-error.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-volatile2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/cp/decl2.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/pr65327.C
>From gcc-bugs-return-625520-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 18:54:38 2018
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Subject: [Bug c++/86608] [7/8 Regression] volatile variable is taken as a constexpr
Date: Tue, 11 Dec 2018 18:54:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Summary|[7/8/9 Regression] volatile |[7/8 Regression] volatile
|variable is taken as a |variable is taken as a
|constexpr |constexpr
--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed for GCC 9.
>From gcc-bugs-return-625521-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 20:16:47 2018
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From: "vlovich at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
Date: Tue, 11 Dec 2018 20:16:00 -0000
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--- Comment #17 from Vitali <vlovich at gmail dot com> ---
I was explicitly asked to open this as a separate bug in comment #7 of 87950.
Would be helpful if the GCC devs could coordinate to figure out if they want
separate bugs for C/C++ or 1 bug.
Jonathan, on this forum your feedback comes off a bit like Skinner where he
blames the children. There's clearly a gap between how compiler authors define
switches as working & how developers wish to use those enums/wish those enums
were actually defined. I appreciate there's a large amount of legacy code that
complicates this issue but I don't think that condescending to people trying to
communicate the issue in good faith moves the conversation along.
I'd argue that clang strikes a much better balance here in terms of the
practical implications of the warning even if it's not perfect. In my mind,
warnings are most useful when they optimize for a low rate of false positives.
The GCC warnings for enums do not in practice have a low rate of false
positives and are clearly tuned to minimize false negatives (i.e. accidentally
missing a switch statement that doesn't have all enums covered).
At the very least it would be useful to give users the power to turn on a
warning equivalent to Clang's that minimizes false negatives (or change
-Wswitch to be equivalent to Clang & add a -Wpedantic-switch that's part of
-pedantic for the current behaviour).
You could even provide annotations that let users annotate enums/switches in an
explicit fashion to indicate that they can be constructed with non-label
values/aren't expected to be depending on which flag you choose to use to
silence warnings/let the compiler optimize more fully.
In practice, definitely in C++, enums ARE intended to be a closed set of all
possible paths & the flags/random integer value cases are far less frequently
used; even for bitmasks it's a lazy way to do it. In C++ I usually define
strongly-typed types that represent the bitmask & overload the bit math
operators for the enum to yield that secondary type. I think considering that's
a technique used by Boost & Qt, it's reasonable to assume that having the enum
double as the storage type for the bitmask is more of a hack technically
allowed than one that is considered best practice by large C++ projects. In C
it's more muddled because there's no operator overloading, but the number of
enums that exist far outnumber the uses where it's used for bitwise math.
>From gcc-bugs-return-625522-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 11 20:29:14 2018
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Subject: [Bug tree-optimization/80520] [7/8/9 Regression] Performance regression from missing if-conversion
Date: Tue, 11 Dec 2018 20:29:00 -0000
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--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Dec 11 20:28:35 2018
New Revision: 267031
URL: https://gcc.gnu.org/viewcvs?rev=267031&root=gcc&view=rev
Log:
PR tree-optimization/80520
* gcc.dg/tree-ssa/split-path-11.c (foo): Make the test ilp32 target
clean.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/split-path-11.c
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From: "richard-gccbugzilla at metafoo dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86049] Array bindings are not const when initializer is
Date: Tue, 11 Dec 2018 20:38:00 -0000
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--- Comment #5 from Richard Smith <richard-gccbugzilla at metafoo dot co.uk> ---
This was just reported as http://lists.isocpp.org/core/2018/12/5320.php; I
don't believe it's on the core issues list yet.
[@Tomalak, I think the standard is clear here:
"If the assignment-expression in the initializer has array type A and no
ref-qualifier is present, e has type cv A"
Here, A is the array type 'const int[1]' and cv is empty, so e has type 'const
int[1]'. But, as noted in comment#2, that seems like the wrong outcome. It also
contradicts the non-normative note in [dcl.struct.bind]p3, which further
suggests that this outcome was probably not the intent of the wording.]
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Subject: [Bug c++/87861] [9 regression] ICE in output_constructor_regular_field, at varasm.c:5165
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87861
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Dec 11 20:37:53 2018
New Revision: 267032
URL: https://gcc.gnu.org/viewcvs?rev=267032&root=gcc&view=rev
Log:
PR c++/87861
* class.c (build_vtbl_initializer): For TARGET_VTABLE_USES_DESCRIPTORS
bump index for each added word.
* constexpr.c (find_array_ctor_elt): Add forward declaration.
(cxx_eval_call_expression): Handle TARGET_VTABLE_USES_DESCRIPTORS
vtable calls.
(cxx_eval_constant_expression) <case OBJ_TYPE_REF>: Divide token
by TARGET_VTABLE_USES_DESCRIPTORS if non-zero.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/cp/constexpr.c
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Subject: [Bug c++/87861] [9 regression] ICE in output_constructor_regular_field, at varasm.c:5165
Date: Tue, 11 Dec 2018 21:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Should be fixed now.
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Subject: [Bug middle-end/88448] [9 regression] gnat.dg/opt66.adb etc. FAIL
Date: Tue, 11 Dec 2018 21:03:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
-FAIL: gnat.dg/opt66.adb (test for excess errors)
-FAIL: gnat.dg/opt66.adb 3 blank line(s) in output
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Subject: [Bug fortran/88455] New: False positive for allocatable character array of deferred length, ALLOCATE using SOURCE/MOLD [-Wuninitialized]
Date: Tue, 11 Dec 2018 22:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88455
Bug ID: 88455
Summary: False positive for allocatable character array of
deferred length, ALLOCATE using SOURCE/MOLD
[-Wuninitialized]
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: adam at aphirst dot karoo.co.uk
Target Milestone: ---
program test
implicit none
call F(1, 10, 30)
contains
subroutine F(i,j,k)
integer, intent(in) :: i, j, k
character(:), allocatable :: line(:)
! with a hard-coded len, the warning goes away
! similarly if it's deferred-length but scalar
!character(k), allocatable :: line(:)
allocate( line(i:j), source = repeat(" ",k) )
print *, size(line) ! gives 10
print *, len(line) ! gives 30
end subroutine
end program test
---
Warning: ‘.line’ is used uninitialized in this function [-Wuninitialized]
---
Using a single ALLOCATE statement for an allocatable array of CHARACTER with
deferred length (using either SOURCE or MOLD) results in a false positive for
uninitialised variables.
The issue doesn't occur if the variable is ONLY an allocatable array, or
respectively if it's ONLY of deferred length. The issue occurs only when both
degrees of freedom are present.
System:
-------
gcc (GCC) 8.2.1 20181127
Arch Linux x86_64
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Subject: [Bug fortran/88455] False positive for allocatable character array of deferred length, ALLOCATE using SOURCE/MOLD [-Wuninitialized]
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--- Comment #1 from Adam Hirst <adam at aphirst dot karoo.co.uk> ---
I'm not sure whether they're related, but I found a handful of
potentially-similar bugs, which might be worth collating here for quicker
reference.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=28660
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=32035
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46979
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53714
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66459
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Subject: [Bug target/83562] broken destructors of thread_local objects on i686 mingw targets
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--- Comment #3 from Thiago Macieira <thiago at kde dot org> ---
This can easily be fixed by way of a trampoline that adjusts the parameter.
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Subject: [Bug c++/88375] Vague source location for bad initialization
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch: https://gcc.gnu.org/ml/gcc-patches/2018-12/msg00746.html
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From: "adam at aphirst dot karoo.co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88455] False positive for allocatable character array of deferred length, ALLOCATE using SOURCE/MOLD [-Wuninitialized]
Date: Tue, 11 Dec 2018 22:13:00 -0000
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--- Comment #2 from Adam Hirst <adam at aphirst dot karoo.co.uk> ---
Slightly reduced - the issue occurs even in the MAIN program:
program test
implicit none
integer :: a, b, c
character(:), allocatable :: line(:)
a = 1; b = 10; c = 30
allocate( line(a:b), source = repeat(" ",c) )
end program test
...and also if the integers are declared PARAMETER:
program test
implicit none
integer, parameter :: a=1, b=10, c=30
character(:), allocatable :: line(:)
allocate( line(a:b), source = repeat(" ",c) )
end program test
...and even if they're hard-coded into the ALLOCATE call:
program test
implicit none
character(:), allocatable :: line(:)
allocate( line(1:10), source = repeat(" ",30) )
end program test
Yet, as far as I understand the Fortran standard, the string `line` here should
be considered fully allocated by the ALLOCATE statement, therefore I think
the warning is spurious.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/86979] [9 Regression] ICE: in maybe_record_trace_start, at dwarf2cfi.c:2348 with -m32 on darwin
Date: Tue, 11 Dec 2018 22:16:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |abel at gcc dot gnu.org,
| |amonakov at gcc dot gnu.org
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Aha, I had to use -fpic additionally in my cross.
Seems like sel-sched bug to me.
In *.split4 we still have correct:
(insn/f 71 9 72 2 (parallel [
(set (reg/f:SI 7 sp)
(plus:SI (reg/f:SI 7 sp)
(const_int -12 [0xfffffffffffffff4])))
(clobber (reg:CC 17 flags))
(clobber (mem:BLK (scratch) [0 A8]))
]) "pr69102.c":8:1 954 {pro_epilogue_adjust_stack_si_add}
(expr_list:REG_UNUSED (reg:CC 17 flags)
(expr_list:REG_CFA_ADJUST_CFA (set (reg/f:SI 7 sp)
(plus:SI (reg/f:SI 7 sp)
(const_int -12 [0xfffffffffffffff4])))
(nil))))
in prologue at the start of function, then body including a tablejump and
finally
(insn 48 47 49 5 (parallel [
(set (reg/f:SI 7 sp)
(plus:SI (reg/f:SI 7 sp)
(const_int -12 [0xfffffffffffffff4])))
(clobber (reg:CC 17 flags))
]) "pr69102.c":22:3 190 {*addsi_1}
(expr_list:REG_UNUSED (reg:CC 17 flags)
(expr_list:REG_ARGS_SIZE (const_int 12 [0xc])
(nil))))
(insn 49 48 50 5 (set (mem:SI (pre_dec:SI (reg/f:SI 7 sp)) [1 S4 A32])
(reg/v:SI 0 ax [orig:84 ch ] [84])) "pr69102.c":22:3 43 {*pushsi2}
(expr_list:REG_DEAD (reg/v:SI 0 ax [orig:84 ch ] [84])
(expr_list:REG_ARGS_SIZE (const_int 16 [0x10])
(nil))))
(call_insn 50 49 73 5 (call (mem:QI (symbol_ref:SI ("bar") [flags 0x41]
<function_decl 0x7f9013919900 bar>) [0 bar S1 A8])
(const_int 16 [0x10])) "pr69102.c":22:3 663 {*call}
(nil)
(nil))
(note 73 50 74 5 NOTE_INSN_EPILOGUE_BEG)
(insn/f 74 73 75 5 (parallel [
(set (reg/f:SI 7 sp)
(plus:SI (reg/f:SI 7 sp)
(const_int 28 [0x1c])))
(clobber (reg:CC 17 flags))
(clobber (mem:BLK (scratch) [0 A8]))
]) "pr69102.c":23:1 954 {pro_epilogue_adjust_stack_si_add}
(expr_list:REG_ARGS_SIZE (const_int 0 [0])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(expr_list:REG_CFA_ADJUST_CFA (set (reg/f:SI 7 sp)
(plus:SI (reg/f:SI 7 sp)
(const_int 12 [0xc])))
(nil)))))
(jump_insn 75 74 78 5 (simple_return) "pr69102.c":23:1 686
{simple_return_internal}
(nil)
as the only stack-changing instructions. But sel-sched for some reason copies
the sp adjustment (insn 48) above to a different basic block before the
tablejump and due to that copy there is a basic block reachable from code with
different stack depths (i.e. different CFA offset), the initial one from right
after the prologue and the adjusted one due to this sel-sched bug.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88455] False positive for allocatable character array of deferred length, ALLOCATE using SOURCE/MOLD [-Wuninitialized]
Date: Tue, 11 Dec 2018 22:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88455
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-11
Version|unknown |9.0
Blocks| |24639
Ever confirmed|0 |1
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 5.5.0 up to trunk (9.0). Compiling the code with 4.8 or 4.9
gives an ICE.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=24639
[Bug 24639] [meta-bug] bug to track all Wuninitialized issues
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Subject: [Bug middle-end/53714] false positive for -Wuninitialized
Date: Tue, 11 Dec 2018 22:43:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Fixed between revisions r232451 (2016-01-15, warning) and r233563 (2016-02-19,
OK).
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Subject: [Bug ada/88429] Ada bootstrap fails with --disable-shared
Date: Tue, 11 Dec 2018 23:05:00 -0000
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Tue Dec 11 23:04:39 2018
New Revision: 267034
URL: https://gcc.gnu.org/viewcvs?rev=267034&root=gcc&view=rev
Log:
libada/
PR ada/88429
* configure.ac (default_gnatlib_target): Set to gnatlib instead of
gnatlib-plain if --disable-shared.
* configure: Regenerate.
* Makefile.in (all): Replace gnatlib prerequisite with libada.
(ADA_RTS_SUBDIR): Delete.
(libada): New target, renamed from...
(gnatlib): ...this. Merge with other library targets.
(gnatlib-plain): Delete.
(install-gnatlib): Rename to...
(install-libada): ...this.
(install): Replace install-gnatlib prerequisite with install-libada.
gcc/ada/
PR ada/88429
* gcc-interface/Makefile.in (./stamp-gnatlib1-$(RTSDIR)): Also pass
MULTISUBDIR to sub-make and add quotes around $(THREAD_KIND).
(gnatlib-shared-dual): Also pass PICFLAG_FOR_TARGET to sub-make.
(gnatlib-sjlj): Also pass MULTISUBDIR to sub-make, but do not pass
PICFLAG_FOR_TARGET.
(gnatlib-zcx): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/gcc-interface/Makefile.in
trunk/libada/ChangeLog
trunk/libada/Makefile.in
trunk/libada/configure
trunk/libada/configure.ac
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Subject: [Bug ada/88429] [9 regression] libada build fails with --disable-shared
Date: Tue, 11 Dec 2018 23:08:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
Summary|Ada bootstrap fails with |[9 regression] libada build
|--disable-shared |fails with --disable-shared
--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
This should work again.
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Subject: [Bug fortran/88249] ICE in gfc_resolve_filepos, at fortran/io.c:2853
Date: Tue, 11 Dec 2018 23:13:00 -0000
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--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Tue Dec 11 23:13:19 2018
New Revision: 267035
URL: https://gcc.gnu.org/viewcvs?rev=267035&root=gcc&view=rev
Log:
2018-12-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88249
* gfortran.h: Update prototype for gfc_resolve_filepos().
* io.c (gfc_resolve_filepos): Check for UNIT number if ERR= is present.
Use passed in locus for error message.
* resolve.c (gfc_resolve_code): Pass locus in gfc_resolve_filepos()
call.
2018-12-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88249
* gfortran.dg/pr88249.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr88249.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/gfortran.h
trunk/gcc/fortran/io.c
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88249] ICE in gfc_resolve_filepos, at fortran/io.c:2853
Date: Tue, 11 Dec 2018 23:40:00 -0000
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--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Tue Dec 11 23:39:43 2018
New Revision: 267036
URL: https://gcc.gnu.org/viewcvs?rev=267036&root=gcc&view=rev
Log:
2018-12-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88249
* gfortran.h: Update prototype for gfc_resolve_filepos().
* io.c (gfc_resolve_filepos): Check for UNIT number if ERR= is present.
Use passed in locus for error message.
* resolve.c (gfc_resolve_code): Pass locus in gfc_resolve_filepos()
call.
2018-12-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88249
* gfortran.dg/pr88249.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88249.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/gfortran.h
branches/gcc-8-branch/gcc/fortran/io.c
branches/gcc-8-branch/gcc/fortran/resolve.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88249] ICE in gfc_resolve_filepos, at fortran/io.c:2853
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--- Comment #5 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Wed Dec 12 00:08:12 2018
New Revision: 267037
URL: https://gcc.gnu.org/viewcvs?rev=267037&root=gcc&view=rev
Log:
2018-12-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88249
* gfortran.h: Update prototype for gfc_resolve_filepos().
* io.c (gfc_resolve_filepos): Check for UNIT number if ERR= is present.
Use passed in locus for error message.
* resolve.c (gfc_resolve_code): Pass locus in gfc_resolve_filepos()
call.
2018-12-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88249
* gfortran.dg/pr88249.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr88249.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/gfortran.h
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Subject: [Bug fortran/88249] ICE in gfc_resolve_filepos, at fortran/io.c:2853
Date: Wed, 12 Dec 2018 00:09:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Target Milestone|--- |7.5
--- Comment #6 from kargl at gcc dot gnu.org ---
Fixed on trunk, branch-8, and branch-7. Closing.
>From gcc-bugs-return-625541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 00:29:04 2018
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/77385] "Unclassifiable statement" from gfortran
Date: Wed, 12 Dec 2018 00:29:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
AFAICT everything has been fixed, closing.
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Subject: [Bug fortran/88155] ICE in gfc_format_decoder, at fortran/error.c:947
Date: Wed, 12 Dec 2018 00:53:00 -0000
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--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Wed Dec 12 00:53:08 2018
New Revision: 267041
URL: https://gcc.gnu.org/viewcvs?rev=267041&root=gcc&view=rev
Log:
2018-12-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88155
* primary.c (gfc_match_structure_constructor): Set the locus of
an expression to avoid a NULL pointer dereference.
2018-12-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88155
* gfortran.dg/pr70870_1.f90: Update testcase to use -std=gnu.
* gfortran.dg/pr88155.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr88155.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/primary.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pr70870_1.f90
>From gcc-bugs-return-625543-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 00:54:05 2018
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From: "skunk at iskunk dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/65725] Bootstrap errors on Solaris 10 x86-64, including object diffs
Date: Wed, 12 Dec 2018 00:54:00 -0000
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--- Comment #8 from Daniel Richard G. <skunk at iskunk dot org> ---
Hello Rainer,
(In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #7)
> That bootstrap (amd64-pc-solaris2.10 with as/ld, --disable-shared
> --with-pic) has now completed as well: in addition to libcc1 (PR
> other/66955) and ada (cf. PR ada/88429), I also had to disable go
> because it uses sendfile without explicitly linking with -lsendfile (in
> the shared case, this works because libgo is linked with libsendfile).
>
> Anyway, the bootstrap has now finished successfully and make check is
> running: no comparison failures at all. So unless there's additional
> information how to reproduce this, I'll close the PR as WORKSFORME.
I tested this again with GCC 8.2.0 on the same system, using as/ld, and am
still seeing the object diffs. Would it help if I provided a copy of the
objects at issue?
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From: "hoganmeier at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/88440] size optimization of memcpy-like code
Date: Wed, 12 Dec 2018 01:09:00 -0000
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--- Comment #3 from krux <hoganmeier at gmail dot com> ---
Adding -ftree-loop-distribute-patterns to -Os does not seem to make a
difference though.
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Subject: [Bug fortran/88155] ICE in gfc_format_decoder, at fortran/error.c:947
Date: Wed, 12 Dec 2018 01:16:00 -0000
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--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Wed Dec 12 01:14:58 2018
New Revision: 267042
URL: https://gcc.gnu.org/viewcvs?rev=267042&root=gcc&view=rev
Log:
2018-12-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88155
* primary.c (gfc_match_structure_constructor): Set the locus of
an expression to avoid a NULL pointer dereference.
2018-12-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88155
* gfortran.dg/pr70870_1.f90: Update testcase to use -std=gnu.
* gfortran.dg/pr88155.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88155.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/primary.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr70870_1.f90
>From gcc-bugs-return-625546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 01:24:00 2018
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From: "patrick at motec dot com.au" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/88456] New: __atomic_compare_exchange implementation inconsistently used
Date: Wed, 12 Dec 2018 01:23:00 -0000
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Bug ID: 88456
Summary: __atomic_compare_exchange implementation
inconsistently used
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: patrick at motec dot com.au
Target Milestone: ---
While implementing atomic support for an embedded target I came across some
unexpected behaviour in gcc.
In the following example:
#include <stdatomic.h>
#include <stdbool.h>
#include <stdint.h>
bool
__atomic_compare_exchange_1(uint8_t *p, uint8_t *e, uint8_t d, bool w, int sm,
int fm)
{
asm volatile("nop");
return false;
}
int main()
{
uint8_t x, e, d;
atomic_compare_exchange_strong_explicit(&x, &e, d, 0, 0);
return 0;
}
The provided __atomic_compare_exchange_1 implementation is only used at -O2 or
greater:
% gcc -c -O0 test.c; objdump -d test.o |grep cmpxchg
60: f0 40 0f b0 31 lock cmpxchg %sil,(%rcx)
% gcc -c -O1 test.c; objdump -d test.o |grep cmpxchg
20: f0 0f b0 4c 24 07 lock cmpxchg %cl,0x7(%rsp)
% gcc -c -O2 test.c; objdump -d test.o |grep cmpxchg
% gcc -c -O3 test.c; objdump -d test.o |grep cmpxchg
This was observed with gcc 8.2.1:
% gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/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
--enable-cet=auto
Thread model: posix
gcc version 8.2.1 20181127 (GCC)
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Subject: [Bug fortran/88155] ICE in gfc_format_decoder, at fortran/error.c:947
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--- Comment #5 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Wed Dec 12 01:26:12 2018
New Revision: 267043
URL: https://gcc.gnu.org/viewcvs?rev=267043&root=gcc&view=rev
Log:
2018-12-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88155
* primary.c (gfc_match_structure_constructor): Set the locus of
an expression to avoid a NULL pointer dereference.
2018-12-11 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88155
* gfortran.dg/pr70870_1.f90: Update testcase to use -std=gnu.
* gfortran.dg/pr88155.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr88155.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/primary.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr70870_1.f90
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Subject: [Bug fortran/88155] ICE in gfc_format_decoder, at fortran/error.c:947
Date: Wed, 12 Dec 2018 01:27:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Target Milestone|--- |7.5
--- Comment #6 from kargl at gcc dot gnu.org ---
Fixed on trunk, branch-8, and branch-7.
>From gcc-bugs-return-625549-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 01:31:21 2018
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From: "sandra at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/59447] --with-dwarf2 should be documented as meaning "DWARF 2 or later" instead of just "DWARF 2"
Date: Wed, 12 Dec 2018 01:31:00 -0000
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sandra at gcc dot gnu.org changed:
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CC| |sandra at gcc dot gnu.org
--- Comment #5 from sandra at gcc dot gnu.org ---
Actually, this issue is already on my radar, but there are definitely more
documentation bugs out there than I have time to fix this release cycle.
Of course there's nothing stopping other people from fixing some of these
things too. :-)
>From gcc-bugs-return-625550-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 01:58:13 2018
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Subject: [Bug fortran/88116] [8/9 Regression] ICE in gfc_convert_constant(): Unexpected type
Date: Wed, 12 Dec 2018 01:58:00 -0000
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #5 from kargl at gcc dot gnu.org ---
(In reply to G. Steinmetz from comment #0)
> Silently accepted invalid code, produces a wrong result :
>
>
> $ cat z2.f90
> program p
> print *, [integer :: 1, [integer(8) :: 2, '3']]
> end
>
>
> $ gfortran-9-20181118 z2.f90 -static-libgfortran
> $ a.out
> 1 2 0
Gerhard, I don't know if you like to keep track of issues
that you submit or not. The above is quite strange if
integer(8) is replaced with integer or integer(4), I get
the expected error message. If it is integer(1), integer(2),
or integer(8), it silently compiles. If I do,
print *, [integer(8) :: 2, '3']
I et the expected error. Do you want to migrate this to its
own PR? If not, I'll do it when I get around to committing the
fix for the other issues.
>From gcc-bugs-return-625551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 02:41:17 2018
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Subject: [Bug target/88457] New: ICE: Max. number of generated reload insns per insn is achieved (90)
Date: Wed, 12 Dec 2018 02:41:00 -0000
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Summary: ICE: Max. number of generated reload insns per insn is
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Target: powerpc-*-linux-gnu
gcc-9.0.0-alpha20181209 snapshot (r266934) ICEs when compiling
gcc/testsuite/gcc.target/powerpc/clone1.c w/ -mcpu=power7 -O1
-fexpensive-optimizations --param ira-max-conflict-table-size=0 --param
max-cse-insns=3:
% powerpc-e300c3-linux-gnu-gcc-9.0.0-alpha20181209 -mcpu=power7 -O1
-fexpensive-optimizations --param ira-max-conflict-table-size=0 --param
max-cse-insns=3 -c gcc/testsuite/gcc.target/powerpc/clone1.c
during RTL pass: reload
gcc/testsuite/gcc.target/powerpc/clone1.c: In function 'mod_func_or':
gcc/testsuite/gcc.target/powerpc/clone1.c:23:1: internal compiler error: Max.
number of generated reload insns per insn is achieved (90)
23 | }
| ^
0xba14ee lra_constraints(bool)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/lra-constraints.c:4850
0xb882f8 lra(_IO_FILE*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/lra.c:2446
0xb3e2f4 do_reload
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/ira.c:5475
0xb3e2f4 execute
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181209/work/gcc-9-20181209/gcc/ira.c:5659
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Subject: [Bug c/26732] different argument type not rejected for K&R style function definitions
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--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #6)
> Now we don't even error out at -O3.
Why would the -O3 matter?
>From gcc-bugs-return-625553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 04:11:20 2018
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Subject: [Bug testsuite/37703] Ada testsuites lack multilib support
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=37704
--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
Related: bug 37704
>From gcc-bugs-return-625554-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 04:26:09 2018
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Subject: [Bug tree-optimization/81811] missing -Wreturn-local-addr returning strcpy result
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #3)
> (In reply to Richard Biener from comment #2)
> > Wonder whether the memcpy case is because we fold the memcpy away as both
> > memcpy and strcpy are marked RET1 (returns arg1).
>
> The memcpy is eliminated in DSE and turned into a plain 'return a' statement
> that the find_explicit_erroneous_behavior() in tree-ssa-isolate-paths.c
> that implements the warning knows how to handle.
>
> DSE doesn't handle strcpy or strncpy so the calls are not eliminated and
> because find_explicit_erroneous_behavior() doesn't handle calls, the 'return
> strcpy(a, s)' statement isn't detected.
>
> This suggests an opportunity to improve not just the warning but also DSE.
so, sounds like a missed-optimization too, then
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Subject: [Bug target/51509] Inefficient neon intrinsic code sequence
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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=65375
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Maxim Kuvyrkov from comment #5)
> Oh, sorry, I missed the fact that PR65375 is for aarch64 and this one is for
> armv7. Charles, would you please look at this?
Should Charles still remain the assignee for this?
>From gcc-bugs-return-625556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 04:46:06 2018
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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| |a/show_bug.cgi?id=81665
--- Comment #18 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Vitali from comment #17)
> I was explicitly asked to open this as a separate bug in comment #7 of
> 87950. Would be helpful if the GCC devs could coordinate to figure out if
> they want separate bugs for C/C++ or 1 bug.
>
> Jonathan, on this forum your feedback comes off a bit like Skinner where he
> blames the children. There's clearly a gap between how compiler authors
> define switches as working & how developers wish to use those enums/wish
> those enums were actually defined. I appreciate there's a large amount of
> legacy code that complicates this issue but I don't think that condescending
> to people trying to communicate the issue in good faith moves the
> conversation along.
>
> I'd argue that clang strikes a much better balance here in terms of the
> practical implications of the warning even if it's not perfect. In my mind,
> warnings are most useful when they optimize for a low rate of false
> positives. The GCC warnings for enums do not in practice have a low rate of
> false positives and are clearly tuned to minimize false negatives (i.e.
> accidentally missing a switch statement that doesn't have all enums
> covered).
>
> At the very least it would be useful to give users the power to turn on a
> warning equivalent to Clang's that minimizes false negatives (or change
> -Wswitch to be equivalent to Clang & add a -Wpedantic-switch that's part of
> -pedantic for the current behaviour).
>
> You could even provide annotations that let users annotate enums/switches in
> an explicit fashion to indicate that they can be constructed with non-label
> values/aren't expected to be depending on which flag you choose to use to
> silence warnings/let the compiler optimize more fully.
>
> In practice, definitely in C++, enums ARE intended to be a closed set of all
> possible paths & the flags/random integer value cases are far less
> frequently used; even for bitmasks it's a lazy way to do it. In C++ I
> usually define strongly-typed types that represent the bitmask & overload
> the bit math operators for the enum to yield that secondary type. I think
> considering that's a technique used by Boost & Qt, it's reasonable to assume
> that having the enum double as the storage type for the bitmask is more of a
> hack technically allowed than one that is considered best practice by large
> C++ projects. In C it's more muddled because there's no operator
> overloading, but the number of enums that exist far outnumber the uses where
> it's used for bitwise math.
This reminded me of bug 81665
>From gcc-bugs-return-625557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 05:49:27 2018
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/79593] [7/8/9 Regression] Poor/Worse code generation for FPU on versions after 6
Date: Wed, 12 Dec 2018 05:49:00 -0000
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--- Comment #21 from Jeffrey A. Law <law at redhat dot com> ---
We have this after IRA:
(insn 27 26 28 4 (set (reg:DI 101 [ pretmp_22 ])
(zero_extend:DI (subreg:SI (reg:SF 91 [ pretmp_22 ]) 0))) "j.C":20:35
114 {*zero_extendsidi2}
(expr_list:REG_DEAD (reg:SF 91 [ pretmp_22 ])
(nil)))
(insn 28 27 29 4 (set (reg:XF 100)
(float:XF (reg:DI 101 [ pretmp_22 ]))) "j.C":20:35 169 {floatdixf2}
(expr_list:REG_DEAD (reg:DI 101 [ pretmp_22 ])
(nil)))
Where 91 and 101 will get assigned to memory locations because of the 'm'
constraint for floatdixf2. r100 gets a hard register. We're going to need a
reload for insn 27. So after LRA we have:
(insn 100 26 27 4 (set (reg:SI 0 ax [110])
(mem/c:SI (reg/f:SI 7 sp) [6 %sfp+-8 S4 A64])) "j.C":20:35 67
{*movsi_internal}
(nil))
(insn 27 100 28 4 (set (mem/c:DI (reg/f:SI 7 sp) [6 %sfp+-8 S8 A64])
(zero_extend:DI (reg:SI 0 ax [110]))) "j.C":20:35 114
{*zero_extendsidi2}
(nil))
[ insn 28 doesn't really play a role here other than requiring the 'm'
operand]
The x86 backend has a splitter to optimize insn 27. So post LRA splitting
generates:
(insn 100 26 107 4 (set (reg:SI 0 ax [110])
(mem/c:SI (reg/f:SI 7 sp) [6 %sfp+-8 S4 A64])) "j.C":20:35 67
{*movsi_internal}
(nil))
(insn 107 100 108 4 (set (mem/c:SI (reg/f:SI 7 sp) [6 %sfp+-8 S4 A64])
(reg:SI 0 ax [110])) "j.C":20:35 67 {*movsi_internal}
(nil))
(insn 108 107 28 4 (set (mem/c:SI (plus:SI (reg/f:SI 7 sp)
(const_int 4 [0x4])) [6 %sfp+-4 S4 A32])
(const_int 0 [0])) "j.C":20:35 67 {*movsi_internal}
(nil))
Now we've finally exposed the redundancy. This can be addressed in DSE2
which runs after SPLIT2. But it's not all that generally effective. Figure
we're getting ~8 hits per stage during a bootstrap -- all in the runtime
system.
I looked at perhaps trying to detect the partial dead store in postreload-gcse.
THere's a lot of good memory tracking bits in here, but it's still not a good
fit.
It doesn't really feel like an IRA/LRA problem to me. Their decisions are sane
AFAICT.
We could try and catch it with a new peephole pattern, but that seems even less
desirable than detecting this in a generic way during DSE.
>From gcc-bugs-return-625558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 06:14:00 2018
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
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Vineet Gupta <vgupta at synopsys dot com> changed:
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--- Comment #5 from Vineet Gupta <vgupta at synopsys dot com> ---
Hi, I'm the ARC glibc maintainer (and desperate for this fix).
The proposed (one liner) patch seems to fix the compiler assert for sue. I'm
still running more tests to make sure it is functional but looks promising.
>From gcc-bugs-return-625559-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 06:31:07 2018
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
Date: Wed, 12 Dec 2018 06:31:00 -0000
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--- Comment #6 from Claudiu Zissulescu <claziss at gmail dot com> ---
The dejagnu tests for ARC look alright. No extra failures.
>From gcc-bugs-return-625560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 06:54:25 2018
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From: "yaghmour.shafik at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88458] New: Conditional expression where the second and third operand are int and nullptr treated as ill-formed
Date: Wed, 12 Dec 2018 06:54:00 -0000
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Bug ID: 88458
Summary: Conditional expression where the second and third
operand are int and nullptr treated as ill-formed
Product: gcc
Version: 9.0
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Given the following code
char* ch4 = true ? 0 : nullptr;
and compiling with the following flags:
-std=c++17
gcc produces the following diagnostic:
error: operands to ?: have different types 'int' and 'std::nullptr_t'
4 | char* ch4 = true ? 0 : nullptr;
| ~~~~~^~~~~~~~~~~~~
Both clang and MSVC accepts this code w/o diagnostic, see godbolt:
https://godbolt.org/z/BraaEu
I believe according to http://eel.is/c++draft/expr.cond#7.5 this is
well-formed.
>From gcc-bugs-return-625561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 07:01:32 2018
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Subject: [Bug bootstrap/88450] ICE in stage 2 compiler while configuring libgcc
Date: Wed, 12 Dec 2018 07:01:00 -0000
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--- Comment #1 from Bence Szabó <sbence92 at gmail dot com> ---
Correction: 9-21081118 works after patching with "PR bootstrap/88106" (r266309)
>From gcc-bugs-return-625562-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 07:02:08 2018
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Subject: [Bug middle-end/86979] [9 Regression] ICE: in maybe_record_trace_start, at dwarf2cfi.c:2348 with -m32 on darwin
Date: Wed, 12 Dec 2018 07:02:00 -0000
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Andrey Belevantsev <abel at gcc dot gnu.org> changed:
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--- Comment #7 from Andrey Belevantsev <abel at gcc dot gnu.org> ---
Looks like mine.
>From gcc-bugs-return-625563-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 07:10:48 2018
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From: "jiangning.liu at amperecomputing dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88459] New: vectorization failure for a simple sum reduction loop
Date: Wed, 12 Dec 2018 07:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88459
Bug ID: 88459
Summary: vectorization failure for a simple sum reduction loop
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: jiangning.liu at amperecomputing dot com
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For the simple loop below, gcc -O3 fails to vectorize it.
unsigned int tmp[1024];
unsigned int test_vec(int n)
{
int sum = 0;
for(int i = 0; i < 1024; i++)
{
sum += tmp[i];
}
return sum;
}
The kernel loop is,
.L2:
ldr w2, [x1], 4
add w0, w0, w2
cmp x3, x1
bne .L2
But if we change the data type of sum from "int" to "unsigned int" as below,
unsigned int tmp[1024];
unsigned int test_vec(int n)
{
unsigned int sum = 0;
for(int i = 0; i < 1024; i++)
{
sum += tmp[i];
}
return sum;
}
gcc can vectorize it, and the kernel loop is like,
.L2:
ldr q1, [x0], 16
add v0.4s, v0.4s, v1.4s
cmp x1, x0
bne .L2
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Subject: [Bug other/88318] new test case gcc.dg/independent-cloneids-1.c fails on big endian
Date: Wed, 12 Dec 2018 08:02:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-12-12
CC| |segher at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |segher at gcc dot gnu.org
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed. I have a patch.
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88311] mlongcall indirections are optimised away
Date: Wed, 12 Dec 2018 08:11:00 -0000
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----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I don't see this happening. I used:
===
void g(void *);
void f(void) { g("abcdef"); }
===
With both -O2 -mlongcall -m32 and -O1 -mlongcall -m32 it all seems to
work fine. What are you doing differently?
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Subject: [Bug c++/88449] __builtin_is_constant_evaluated misbehaves due to constexpr call caching
Date: Wed, 12 Dec 2018 08:29:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Dec 12 08:28:43 2018
New Revision: 267044
URL: https://gcc.gnu.org/viewcvs?rev=267044&root=gcc&view=rev
Log:
PR c++/88449
* constexpr.c (struct constexpr_call): Add pretend_const_required
member.
(constexpr_call_hasher::equal): Return false if pretend_const_required
members differ.
(cxx_eval_call_expression): Adjust new_call initialization. Hash in
ctx->pretend_const_required.
* g++.dg/cpp2a/is-constant-evaluated1.C: Change from dg-do compile
to dg-do run.
(e): Adjust comment with correct expected value.
(main): Expect e == 1.
* g++.dg/cpp2a/is-constant-evaluated2.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp2a/is-constant-evaluated2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp2a/is-constant-evaluated1.C
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Subject: [Bug tree-optimization/88440] size optimization of memcpy-like code
Date: Wed, 12 Dec 2018 08:31:00 -0000
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 12 Dec 2018, hoganmeier at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88440
>
> --- Comment #3 from krux <hoganmeier at gmail dot com> ---
> Adding -ftree-loop-distribute-patterns to -Os does not seem to make a
> difference though.
Possibly because of
/* Don't distribute multiple exit edges loop, or cold loop. */
if (!single_exit (loop)
|| !optimize_loop_for_speed_p (loop))
continue;
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Subject: [Bug c++/88446] __builtin_is_constant_evaluated rejects some converted constant expressions.
Date: Wed, 12 Dec 2018 08:45:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Dec 12 08:44:27 2018
New Revision: 267047
URL: https://gcc.gnu.org/viewcvs?rev=267047&root=gcc&view=rev
Log:
PR c++/88446
* cp-tree.h (maybe_constant_value): Add manifestly_const_eval
argument.
* constexpr.c (struct constexpr_call): Rename pretend_const_required
member to manifestly_const_eval.
(struct constexpr_ctx): Likewise.
(constexpr_call_hasher::equal): Adjust users.
(cxx_eval_builtin_function_call): Likewise. Formatting fix.
(cxx_eval_call_expression): Adjust users.
(cxx_eval_outermost_constant_expr, maybe_constant_init_1,
maybe_constant_init): Rename pretend_const_required argument to
manifestly_const_eval, adjust function comments.
(maybe_constant_value): Add manifestly_const_eval argument. If true,
don't cache and call cxx_eval_outermost_constant_expr with true as
manifestly_const_eval.
* decl.c (compute_array_index_type_loc): Call maybe_constant_value
with true as manifestly_const_eval.
* g++.dg/cpp2a/is-constant-evaluated3.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp2a/is-constant-evaluated3.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88343] [7/8/9 Regression] R31 is unconditionally saved/restored on powerpc-darwin even when it's not necessary.
Date: Wed, 12 Dec 2018 08:54:00 -0000
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--- Comment #6 from Iain Sandoe <iains at gcc dot gnu.org> ---
Author: iains
Date: Wed Dec 12 08:53:49 2018
New Revision: 267049
URL: https://gcc.gnu.org/viewcvs?rev=267049&root=gcc&view=rev
Log:
rs6000 - Fix PR target/88343
The PR is about unnecessary saves of the pic base register, it shows on m32
Linux and m32/m64 Darwin.
The fix is to check that we are in a pic mode and that the picbase has actually
been used.
As a bonus, some #ifdef’d TARGET_MACHO code is no longer required.
2018-12-12 Segher Boessenkool <segher@kernel.crashing.org>
Iain Sandoe <iain@sandoe.co.uk>
PR target/88343
* config/rs6000/rs6000.c (save_reg_p): Do not save the picbase reg
unless it has been used.
(first_reg_to_save): Remove dead code.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
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Subject: [Bug rtl-optimization/88311] mlongcall indirections are optimised away
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Iain Sandoe <iains at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> ---
on gcc110:
this fails:
$ cat ~/hello.c
extern int printf (const char *, ...);
int main (int ac, char *av[])
{
printf ("here we are");
return 0;
}
this does not:
$ cat ~/foo.c
void g (void *);
void foo (void) { g ("xyzzy"); }
so maybe something happens with the builtin string handling that does not
affect regular funcs.
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Subject: [Bug libgomp/88460] New: [nvptx] FAIL: libgomp.c++/for-24.C (internal compiler error)
Date: Wed, 12 Dec 2018 09:01:00 -0000
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Bug ID: 88460
Summary: [nvptx] FAIL: libgomp.c++/for-24.C (internal compiler
error)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgomp
Assignee: unassigned at gcc dot gnu.org
Reporter: vries at gcc dot gnu.org
CC: jakub at gcc dot gnu.org
Target Milestone: ---
In more detail:
...
lto1: internal compiler error: in input_varpool_node, at lto-cgraph.c:1371^M
0x987a5b input_varpool_node^M
/home/vries/oacc/trunk/source-gcc/gcc/lto-cgraph.c:1369^M
0x987a5b input_cgraph_1^M
/home/vries/oacc/trunk/source-gcc/gcc/lto-cgraph.c:1491^M
0x987a5b input_symtab()^M
/home/vries/oacc/trunk/source-gcc/gcc/lto-cgraph.c:1681^M
0x5bfafc read_cgraph_and_symbols^M
/home/vries/oacc/trunk/source-gcc/gcc/lto/lto.c:2878^M
0x5bfafc lto_main()^M
/home/vries/oacc/trunk/source-gcc/gcc/lto/lto.c:3362^M
Please submit a full bug report,^M
with preprocessed source if appropriate.^M
Please include the complete backtrace with any bug report.^M
See <https://gcc.gnu.org/bugs/> for instructions.^M
mkoffload: fatal error:
/home/vries/oacc/trunk/install/offload-nvptx-none/bin//x86_64-pc-linux-gnu-accel-nvptx-no\
ne-gcc returned 1 exit status^M
compilation terminated.^M
lto-wrapper: fatal error:
/home/vries/oacc/trunk/install/offload-nvptx-none/libexec/gcc/x86_64-pc-linux-gnu/9.0.0\
//accel/nvptx-none/mkoffload returned 1 exit status^M
compilation terminated.^M
/usr/bin/ld.bfd.real: error: lto-wrapper failed^M
collect2: error: ld returned 1 exit status^M
FAIL: libgomp.c++/for-24.C (internal compiler error)
FAIL: libgomp.c++/for-24.C (test for excess errors)
...
It's this assert that's failing:
...
1369 gcc_assert (flag_ltrans
1370 || (!node->in_other_partition
1371 && !node->used_from_other_partition));
...
because:
...
(gdb) p flag_ltrans
No symbol "flag_ltrans" in current context.
(gdb) p node->in_other_partition
$1 = 1
(gdb) p node->used_from_other_partition
$2 = 0
(gdb) p global_options.x_flag_ltrans
$3 = 0
...
for node:
...
(gdb) call debug_generic_expr (node.decl)
results
...
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Subject: [Bug c++/88449] __builtin_is_constant_evaluated misbehaves due to constexpr call caching
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed I presume.
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Subject: [Bug target/88343] [7/8/9 Regression] R31 is unconditionally saved/restored on powerpc-darwin even when it's not necessary.
Date: Wed, 12 Dec 2018 09:06:00 -0000
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--- Comment #7 from Iain Sandoe <iains at gcc dot gnu.org> ---
so, fixed on trunk so far.
>From gcc-bugs-return-625574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 09:08:56 2018
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Subject: [Bug target/88451] No rounding in fixed-point arithmetic (Decimal to fixed-point conversion, multiplication)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target| |arm
Component|c |target
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note GCC 6 is no longer maintained. please provide compilable testcases.
>From gcc-bugs-return-625575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 09:09:42 2018
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Subject: [Bug testsuite/88454] [9 regression] test case gcc.dg/tree-ssa/split-path-5.c fails after r266971
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug middle-end/88456] __atomic_compare_exchange implementation inconsistently used
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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CC| |jsm28 at gcc dot gnu.org
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I guess your implementation somehow gets picked up by the inliner but
eventually
code generation will open-code non-inlined "calls" with the internally
available implementation.
I _think_ that inlining your implementation is the bug. Joseph?
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Subject: [Bug target/88457] ICE: Max. number of generated reload insns per insn is achieved (90)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |ra
CC| |vmakarov at gcc dot gnu.org
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
ira-max-conflict-table-size=0 might be an impossible value - Vlad?
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Subject: [Bug tree-optimization/88459] vectorization failure for a simple sum reduction loop
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-12
CC| |ktkachov at gcc dot gnu.org
Blocks| |53947
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed on aarch64 and x86_64. Is it because GCC is afraid of signed overflow
or something?
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
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Subject: [Bug rtl-optimization/88311] mlongcall indirections are optimised away
Date: Wed, 12 Dec 2018 09:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88311
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
$ ~/build/tot/gcc/cc1 -quiet -Wall -W -O2 hello2.c -mlongcall -m32
...
main:
.LFB0:
.cfi_startproc
stwu 1,-16(1)
.cfi_def_cfa_offset 16
.reloc .+2,R_PPC_PLT16_HA,printf
lis 11,0
.reloc .+2,R_PPC_PLT16_LO,printf
lwz 11,0(11)
mflr 0
lis 3,.LC0@ha
la 3,.LC0@l(3)
.reloc .,R_PPC_PLTSEQ,printf
mtctr 11
stw 0,20(1)
.cfi_offset 65, 4
crxor 6,6,6
.reloc .,R_PPC_PLTCALL,printf
bctrl
lwz 0,20(1)
li 3,0
addi 1,1,16
.cfi_def_cfa_offset 0
mtlr 0
.cfi_restore 65
blr
.cfi_endproc
.LFE0:
.size main,.-main
.section .rodata.str1.4,"aMS",@progbits,1
.align 2
.LC0:
.string "here we are"
So that works fine?!
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Subject: [Bug d/88150] Use sections_elf_shared.d on Solaris
Date: Wed, 12 Dec 2018 09:29:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Attachment #45067|0 |1
is obsolete| |
--- Comment #5 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 45211
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45211&action=edit
Revised patch
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/88459] vectorization failure for a simple sum reduction loop
Date: Wed, 12 Dec 2018 09:31:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
kind-of.
*** This bug has been marked as a duplicate of bug 65930 ***
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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CC| |jiangning.liu@amperecomputi
| |ng.com
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 88459 has been marked as a duplicate of this bug. ***
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Subject: [Bug tree-optimization/53947] [meta-bug] vectorizer missed-optimizations
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Bug 53947 depends on bug 88459, which changed state.
Bug 88459 Summary: vectorization failure for a simple sum reduction loop
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88459
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>From gcc-bugs-return-625584-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 09:36:02 2018
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Subject: [Bug rtl-optimization/88311] mlongcall indirections are optimised away
Date: Wed, 12 Dec 2018 09:36:00 -0000
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--- Comment #4 from Iain Sandoe <iains at gcc dot gnu.org> ---
hmm strange, my case is repeatable at O2 and with -Wall -W (and without -dp).
(and with/without fPIC).
>From gcc-bugs-return-625585-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 09:37:27 2018
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
Date: Wed, 12 Dec 2018 09:37:00 -0000
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
Last reconfirmed|2015-04-29 00:00:00 |2018-12-12
CC| |ktkachov at gcc dot gnu.org
--- Comment #7 from ktkachov at gcc dot gnu.org ---
Clang vectorises both examples currently (for aarch64 at least)
>From gcc-bugs-return-625586-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 09:39:25 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/81665] Please introduce flags attribute for enums which will mimic one from C#
Date: Wed, 12 Dec 2018 09:39:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Daniel Fruzynski from comment #0)
> - to eliminate above error, one has to define custom | operator for enum
> type. However when it is not marked as a constexpr, it causes another
> compilation error when its result is used as a case value:
> test-enum-op.c:25:15: error: call to non-constexpr function ‘Values
> operator|(Values, Values)’
> case Val2 | Val3:
> ^
So mark it constexpr then. Getting an error for incorrect code is good.
(I have no comment on the rest of the report).
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Subject: [Bug c++/88458] Conditional expression where the second and third operand are int and nullptr treated as ill-formed
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That wording was added by https://wg21.link/N3624
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Subject: [Bug target/51509] Inefficient neon intrinsic code sequence
Date: Wed, 12 Dec 2018 09:48:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|cbaylis at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #8 from Christophe Lyon <clyon at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #7)
> (In reply to Maxim Kuvyrkov from comment #5)
> > Oh, sorry, I missed the fact that PR65375 is for aarch64 and this one is for
> > armv7. Charles, would you please look at this?
>
> Should Charles still remain the assignee for this?
I'm afraid not: Charles no longer works with us.
>From gcc-bugs-return-625589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 09:54:33 2018
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Subject: [Bug c/88461] New: AVX512: gcc should keep value in kN registers if possible
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Bug ID: 88461
Summary: AVX512: gcc should keep value in kN registers if
possible
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I tried to write piece of code which used new AVX512 logic instructions which
works on kN registers. It turned out that gcc was moving intermediate values
back and forth between kN and eax, what resulted in very poor code.
Example was compiled using gcc 8.2 with -O3 -march=skylake-avx512
[code]
#include <immintrin.h>
#include <stdint.h>
int test(uint16_t* data, int a)
{
__m128i v = _mm_load_si128((const __m128i*)data);
__mmask8 m = _mm_testn_epi16_mask(v, v);
m = _kshiftli_mask16(m, 1);
m = _kandn_mask16(m, a);
return m;
}
[/code]
[asm]
test(unsigned short*, int):
vmovdqa64 xmm0, XMMWORD PTR [rdi]
kmovw k5, esi
vptestnmw k1, xmm0, xmm0
kmovb eax, k1
kmovw k2, eax
kshiftlw k0, k2, 1
kmovw eax, k0
movzx eax, al
kmovw k4, eax
kandnw k3, k4, k5
kmovw eax, k3
movzx eax, al
ret
[/asm]
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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 d/88150] Use sections_elf_shared.d on Solaris
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--- Comment #6 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
The revised patch (still with loads of hacks) allowed the vast majority
of Solaris 11.4/x86 gdc tests to PASS, both 32 and 64-bit:
=== gdc Summary ===
# of expected passes 61178
# of unexpected failures 36
# of unresolved testcases 12
The results are identical on Solaris 11.3/x86 with the patches for PR
d/87864 (which provides minfo bracketing if ld doesn't) and
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg02248.html (which links
with -lsocket -lnsl if need be).
Solaris/SPARC is still another issue: I'll report my findings
separately.
Here are the changes from the previous version of the patch:
* Solaris ld doesn't provide __bss_start (and no exact equivalent).
Since __bss_start is declared weak in rt/bss_section.c, this won't get
noticed at link time, but manifests itself as a SEGV caused by an
assertion failure:
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
gc_malloc (sz=40, ba=0,
ti=0xff051250 <ClassInfo for core.exception.AssertError>)
at /vol/gcc/src/hg/trunk/local/libphobos/libdruntime/gc/proxy.d:117
117 return instance.malloc(sz, ba, ti);
(gdb) where
#0 gc_malloc (sz=40, ba=0,
ti=0xff051250 <ClassInfo for core.exception.AssertError>)
at /vol/gcc/src/hg/trunk/local/libphobos/libdruntime/gc/proxy.d:117
#1 0xfefdd018 in _d_newclass (
ci=0xff051250 <ClassInfo for core.exception.AssertError>)
at /vol/gcc/src/hg/trunk/local/libphobos/libdruntime/rt/lifetime.d:96
#2 0xfefaa5cc in onAssertError (file=..., line=918)
at /vol/gcc/src/hg/trunk/local/libphobos/libdruntime/core/exception.d:441
#3 0xfefaaedc in _d_assert (file=..., line=918)
at /vol/gcc/src/hg/trunk/local/libphobos/libdruntime/core/exception.d:641
#4 0xfefe9ff4 in rt.sections_elf_shared.getCopyRelocSection() ()
at
/vol/gcc/src/hg/trunk/local/libphobos/libdruntime/rt/sections_elf_shared.d:918
#5 0xfefebfbc in _d_dso_registry (data=0xffbfe288)
at
/vol/gcc/src/hg/trunk/local/libphobos/libdruntime/rt/sections_elf_shared.d:402
#6 0xfef968b8 in gdc.dso_ctor () at <no_file>:1
#7 gdc.dso_ctor ()
at /vol/gcc/src/hg/trunk/local/libphobos/libdruntime/core/atomic.d:1
#8 global constructors keyed to 4core6atomic ()
at /vol/gcc/src/hg/trunk/local/libphobos/libdruntime/core/atomic.d:1
#9 0xff1a0ccc in call_array () from /usr/lib/ld.so.1
#10 0xff1a0e4c in call_init () from /usr/lib/ld.so.1
#11 0xff1a015c in setup () from /usr/lib/ld.so.1
#12 0xff1b1d44 in _setup () from /usr/lib/ld.so.1
#13 0xff192738 in _rt_boot () from /usr/lib/ld.so.1
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
probably an assertion failure for
findDSOInfoForAddr(bss_start, &info) || assert(0);
since bss_start will be 0 if __bss_start doesn't exist. I've hacked
around this by using _edata instead, which is close, but doesn't
account for the alignment of the .bss section.
* Solaris currently lacks dlpi_tls_modid. The field will probably be
added to struct dl_phdr_info in Solaris 11.5 and perhaps backported to
11.4. I may be able to use the hack (making use of undocumented libc
internals) from src/rt/sections_ldc.d in the ldc-developers druntime
repo in on github if this turns out to work and be stable across
Solaris 10 to 11.3.
For now, I'm cheating by always setting _tlsMod to 0 on Solaris and
disabling the corresponding assertions.
* This allowed the gdc execution tests with -static-libphobos to PASS,
but the -shared-libphobos tests would still FAIL, again with a SEGV
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0xfe5a9559 in gc_malloc (sz=40, ba=0,
ti=0xfe5eb180 <ClassInfo for core.exception.AssertError>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/gc/proxy.d:117
117 return instance.malloc(sz, ba, ti);
(gdb) where
#0 0xfe5a9559 in gc_malloc (sz=40, ba=0,
ti=0xfe5eb180 <ClassInfo for core.exception.AssertError>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/gc/proxy.d:117
#1 0xfe553478 in core.memory.GC.malloc(uint, uint, const(TypeInfo)) (sz=40,
ba=0, ti=0xfe5eb180 <ClassInfo for core.exception.AssertError>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/memory.d:380
#2 0xfe576a04 in _d_newclass (
ci=0xfe5eb180 <ClassInfo for core.exception.AssertError>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/lifetime.d:96
#3 0xfe551994 in onAssertError (file=..., line=657)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/exception.d:441
#4 0xfe551d12 in _d_assert (file=..., line=657)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/exception.d:641
#5 0xfe583579 in
rt.sections_elf_shared.setDSOForHandle(rt.sections_elf_shared.DSO*, void*)
(pdso=0x8062420, handle=0xfe6d27a8)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/sections_elf_shared.d:657
#6 0xfe5822f0 in _d_dso_registry (data=0xfeffd3d4)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/sections_elf_shared.d:409
#7 0xfe0c3540 in gdc.dso_ctor () at <no_file>:1
#8 0xfe0c34b2 in global constructors keyed to 3etc1c4curl ()
at /vol/gcc/src/hg/trunk/solaris/libphobos/src/etc/c/curl.d:1
#9 0xfe6b05cb in call_array () from /usr/lib/ld.so.1
#10 0xfe6b0777 in call_init () from /usr/lib/ld.so.1
#11 0xfe6af53c in setup () from /usr/lib/ld.so.1
#12 0xfe6c1c80 in _setup () from /usr/lib/ld.so.1
#13 0xfe6a1e7f in _rt_boot () from /usr/lib/ld.so.1
#14 0xfeffd8e4 in ?? ()
#15 0xfeffda62 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
caused by an assertion failure here:
void setDSOForHandle(DSO* pdso, void* handle) nothrow @nogc
{
!pthread_mutex_lock(&_handleToDSOMutex) || assert(0);
assert(handle !in _handleToDSO);
Both the first and second times through _d_dso_registry (first for
libgdruntime.so.76.0.3, then for libgphobos.so.76.0.3), I'd get the
same dlopen handle, leading to the assertion failure above.
However, I wonder how this can work at all: going through
handleForAddr and then handleForName
void* handleForName(const char* name) nothrow @nogc
{
auto handle = .dlopen(name, RTLD_NOLOAD | RTLD_LAZY);
if (handle !is null) .dlclose(handle); // drop reference count
return handle;
}
how can one expect that the handle returned for a different DSO the
next time through isn't the same after it has first been dlclose'd? I
must be missing something here...
With the dlclose disabled on Solaris to keep the handle valid on
return from handleForName, I'm getting the test results cited above,
perhaps an indication that this is not totally wrong ;-)
>From gcc-bugs-return-625592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 09:58:40 2018
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Subject: [Bug libgomp/88460] [nvptx] FAIL: libgomp.c++/for-24.C (internal compiler error)
Date: Wed, 12 Dec 2018 09:58:00 -0000
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
> Richard Biener <rguenth at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Keywords| |lto
> CC| |hubicka at gcc dot gnu.org
>
FTR, the gomp4 and openacc-gcc-{7,8}-branch branches contain a patch to emit an
error "missing <results>" here instead of ICE-ing, submitted as "[PATCH] error
on missing LTO symbols" here (
https://gcc.gnu.org/ml/gcc-patches/2016-07/msg00043.html ).
>From gcc-bugs-return-625591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 09:58:06 2018
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/88454] [9 regression] test case gcc.dg/tree-ssa/split-path-5.c fails after r266971
Date: Wed, 12 Dec 2018 09:58:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc64*-unknown-linux-gn |powerpc64*-unknown-linux-gn
|u |u arm aarch64
CC| |clyon at gcc dot gnu.org
--- Comment #2 from Christophe Lyon <clyon at gcc dot gnu.org> ---
I see the same error on arm and aarch64.
>From gcc-bugs-return-625593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 10:00:50 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
Date: Wed, 12 Dec 2018 10:00:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note the tricky part is not so much the loop vectorization (teaching reduction
path support about the conversion is not difficult with the twist that we
need to handle conversions as reduction code...) but the vector epilogue which
does the lane reduction in signed int exposing undefined overflow issues.
Of course the vectorizer doesn't seem to care here anyways and vectorizes
signed integer reductions without caring for that specific issue...
In general feeding the conversion as reduction operation through the vectorizer
is a bit awkward so pattern-recognizing this as
int tem = (int)x[i];
sum += tem;
would be easier given we seem to ignore the undefined overflow issues...
>From gcc-bugs-return-625594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 10:04:47 2018
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Subject: [Bug target/88461] AVX512: gcc should keep value in kN registers if possible
Date: Wed, 12 Dec 2018 10:04:00 -0000
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--- Comment #1 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
For comparison, this is code generated by icc 19.0.1:
[asm]
test(unsigned short*, int):
vmovdqu xmm0, XMMWORD PTR [rdi] #6.48
vptestnmw k0, xmm0, xmm0 #7.18
kmovw k2, esi #11.9
kshiftlw k1, k0, 1 #9.9
kandnw k3, k1, k2 #11.9
kmovb k4, k3 #13.12
kmovw eax, k4 #13.12
ret #13.12
[/asm]
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/88462] New: All D execution tests FAIL on Solaris/SPARC
Date: Wed, 12 Dec 2018 10:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88462
Bug ID: 88462
Summary: All D execution tests FAIL on Solaris/SPARC
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: d
Assignee: ibuclaw at gdcproject dot org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Target: sparc*-sun-solaris2.*
Even with the latest patch for PR d/88150 to use sections_elf_shared.d on
Solaris,
which allows the vast majority of gdc execution tests to PASS on Solaris
11.4/x86,
I have no such luck on Solaris 11.5/SPARC: all tests FAIL with
Aborting from local/libphobos/libdruntime/core/sync/mutex.d(95) Error:
pthread_mutex_init failed.
Thread 2 received signal SIGABRT, Aborted.
[Switching to Thread 1 (LWP 1)]
0xfec7e044 in __lwp_sigqueue () from /lib/libc.so.1
(gdb) where
#0 0xfec7e044 in __lwp_sigqueue () from /lib/libc.so.1
#1 0xfebb9898 in raise () from /lib/libc.so.1
#2 0xfeb8b1d0 in abort () from /lib/libc.so.1
#3 0x000c150c in core.internal.abort.abort(immutable(char)[],
immutable(char)[], uint) (msg=...,
filename=<error reading variable: Cannot access memory at address 0x5f>,
line=95)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/internal/abort.d:44
#4 0x000fe32c in core.sync.mutex.Mutex.this!(core.sync.mutex.Mutex).this(bool)
(this=0x12de34 <core.thread.Thread._locks+44>, _unused_=true)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/sync/mutex.d:94
#5 0x000fdeac in core.sync.mutex.Mutex.this() (
this=0x12de34 <core.thread.Thread._locks+44>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/sync/mutex.d:63
#6 0x000c64d0 in core.thread.Thread.initLocks() ()
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/thread.d:1726
#7 0x000c69d8 in thread_init ()
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/thread.d:2022
#8 0x000a232c in gc_init ()
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/gc/proxy.d:56
#9 0x00080684 in rt_init ()
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:187
#10 0x000810c8 in runAll (this=0xffbfe904)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:485
#11 0x00081020 in tryExec (this=0xffbfe904, dg=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:461
#12 0x00080f2c in _d_run_main (argc=1, argv=0xffbfea34,
mainFunc=0x6b2bc <D main>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:494
#13 0x0006b24c in main (argc=1, argv=0xffbfea34)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/__entrypoint.di:44
#14 0x0006b014 in _start ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
!pthread_mutex_init(cast(pthread_mutex_t*) &m_hndl, &attr) ||
abort("Error: pthread_mutex_init failed.");
After much digging and head scratching, I found what's wrong:
pthread_mutex_init
expects the mutex to be long long (i.e. 8 byte) aligned. I'd thought this
would happen automatically given the declaration in core/sys/posix/sys/types.d
with the ulong __pthread_mutex_data field which has a natural alignment of
64 bits. Whatever I do, however, I only end up with the mutex being 4-byte
aligned:
* apply align(8): at the beginning of the pthread_mutex_t fields,
* apply align(8) to the struct pthread_mutex_t declaration, or
* apply align(8) to the m_hndl member of Class Mutex in core/sync/mutex.d.
To guard against incomplete dependencies that could lead to some parts not
being recompiled when they should, I've always recompiled all of libphobos to
be sure I didn't miss something.
I've no idea what I'm doing wrong here.
>From gcc-bugs-return-625596-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 10:14:22 2018
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Subject: [Bug d/88462] All D execution tests FAIL on Solaris/SPARC
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
>From gcc-bugs-return-625597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 10:20:06 2018
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Subject: [Bug c/81665] Please introduce flags attribute for enums which will mimic one from C#
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--- Comment #4 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
@Jonathan Wakely: constexpr requires C++11. When I reported this bug, we still
were at C++98 with most of out codebase.
>From gcc-bugs-return-625598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 10:22:20 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
Date: Wed, 12 Dec 2018 10:22:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #8)
> Note the tricky part is not so much the loop vectorization (teaching
> reduction path support about the conversion is not difficult with the twist
> that we
> need to handle conversions as reduction code...) but the vector epilogue
> which
> does the lane reduction in signed int exposing undefined overflow issues.
>
> Of course the vectorizer doesn't seem to care here anyways and vectorizes
> signed integer reductions without caring for that specific issue...
>
> In general feeding the conversion as reduction operation through the
> vectorizer
> is a bit awkward so pattern-recognizing this as
>
> int tem = (int)x[i];
> sum += tem;
>
> would be easier given we seem to ignore the undefined overflow issues...
but pattern recog runs after reduction detection (and that's not easy to
change).
>From gcc-bugs-return-625599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 10:24:57 2018
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Subject: [Bug fortran/88247] [8/9 Regression] ICE in get_array_ctor_var_strlen, at fortran/trans-array.c:2068
Date: Wed, 12 Dec 2018 10:24:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-12
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I get an ICE with 7.3.0, down to at least 5.5.0, so this does not look as
regression.
The ICE disappeared in 7.3.1 between r246963 and r266621.
>From gcc-bugs-return-625600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 10:32:23 2018
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Subject: [Bug target/88461] AVX512: gcc should keep value in kN registers if possible
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
<bb 2> [local count: 1073741824]:
_13 = MEM[(const __m128i * {ref-all})data_3(D)];
_11 = VIEW_CONVERT_EXPR<vector(8) short int>(_13);
_12 = __builtin_ia32_ptestnmw128 (_11, _11, 255);
_1 = (int) _12;
_10 = __builtin_ia32_kshiftlihi (_1, 1);
_14 = a_6(D) & 65535;
_5 = _10 & 255;
_4 = (int) _5;
_9 = __builtin_ia32_kandnhi (_4, _14);
m_7 = (__mmask8) _9;
_8 = (int) m_7;
return _8;
probably an artifact of C promoting __mmask8 to int:
__m128i v = _mm_load_si128 ((const __m128i * {ref-all}) data);
__mmask8 m = _mm_testn_epi16_mask (v, v);
__m128i v = _mm_load_si128 ((const __m128i * {ref-all}) data);
__mmask8 m = _mm_testn_epi16_mask (v, v);
m = (__mmask8) _kshiftli_mask16 ((int) m, 1);
m = (__mmask8) _mm512_kandn ((int) m, (int) (__mmask16) a);
return (int) m;
and
;; Function _kshiftli_mask16 (null)
;; enabled by -tree-original
{
return (__mmask16) __builtin_ia32_kshiftlihi ((int) __A, (int) (unsigned
char) __B);
btw, why are you using mask16 intrinsics on mask8 types? When using
kshiftli_mask8 and kandn_mask8 I get
vmovdqa64 (%rdi), %xmm0
kmovb %esi, %k3
vptestnmw %xmm0, %xmm0, %k1
kshiftlb $1, %k1, %k0
kandnb %k3, %k0, %k2
kmovb %k2, %eax
>From gcc-bugs-return-625601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 10:35:54 2018
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From: "jiri.pittner@jh-inst.cas.cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88452] gfortran (Gentoo 8.2.0-r5 p1.6) 8.2.0 reports internal error
Date: Wed, 12 Dec 2018 10:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88452
--- Comment #2 from jiri.pittner@jh-inst.cas.cz ---
The workaround works only until you try to access the array:
subroutine tccdenom(n1,n2)
implicit none
integer n1, n2,i,j
real tt1(n1,n2)
complex ctt1(n1,n2)
equivalence(tt1, ctt1)
do i=1,n1
do j=1,n2
ctt1(i,j)=0
enddo
enddo
end
When compiling this, another ICE occurs:
gfortran fi.F
fi.F:9:0:
ctt1(i,j)=0
internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
>From gcc-bugs-return-625602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 10:37:09 2018
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Subject: [Bug target/88451] No rounding in fixed-point arithmetic (Decimal to fixed-point conversion, multiplication)
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--- Comment #2 from Mantas Mikaitis <mantas.mikaitis at manchester dot ac.uk> ---
Created attachment 45212
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45212&action=edit
3 simple testcases
>From gcc-bugs-return-625603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 10:44:48 2018
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Subject: [Bug fortran/88463] New: Rejects conforming source, OpenMP Parallel region Default(None) reference to module parameter array, separate source
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Bug ID: 88463
Summary: Rejects conforming source, OpenMP Parallel region
Default(None) reference to module parameter array,
separate source
Product: gcc
Version: 8.2.1
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Created attachment 45213
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45213&action=edit
A module source and a source to exhibit the bug
Related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63922
Compiler error with OpenMP, default(none) and a parameter array in a module
References to a parameter array within an OpenMP parallel region with the
default(none) clause fail if the parameter array is defined in a module that is
compiled in a separate source file.
gfortran -c constants_module.f90
gfortran -fopenmp modparm2.f90 constants_module.o -o modparam2
modparm2.f90:40:0:
thread_copy(1:4) = constants_m(1:4)
Error: ‘constants_m’ not specified in enclosing ‘parallel’
modparm2.f90:37:0:
!$OMP PARALLEL DEFAULT (NONE) PRIVATE(thread_copy,me)
Error: enclosing ‘parallel’
modparm2.f90:51:0:
real_thread_copy(1:4) = real_constants_m(1:4)
Error: ‘real_constants_m’ not specified in enclosing ‘parallel’
modparm2.f90:48:0:
!$OMP PARALLEL DEFAULT (NONE) PRIVATE(real_thread_copy,me)
Error: enclosing ‘parallel’
>From gcc-bugs-return-625604-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 10:46:28 2018
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Subject: [Bug fortran/88379] [7/8/9 Regression] ICE in resolve_assoc_var, at fortran/resolve.c:8750
Date: Wed, 12 Dec 2018 10:46:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Priority|P3 |P4
CC| |vehre at gcc dot gnu.org
Known to work| |5.5.0
Target Milestone|--- |7.5
Summary|ICE in resolve_assoc_var, |[7/8/9 Regression] ICE in
|at fortran/resolve.c:8750 |resolve_assoc_var, at
| |fortran/resolve.c:8750
Known to fail| |6.4.0, 7.3.0, 8.2.0, 9.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The test compiles with 5.5.0, and gives an ICE between revisions r224647
(2015-06-19, OK) and r225925 (2015-07-17, ICE), likely r224827 (pr64674).
>From gcc-bugs-return-625605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 10:47:21 2018
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Subject: [Bug fortran/88379] [7/8/9 Regression] ICE in resolve_assoc_var, at fortran/resolve.c:8750
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-12
Ever confirmed|0 |1
>From gcc-bugs-return-625606-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 11:00:52 2018
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From: "bugzilla@poradnik-webmastera.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/88461] AVX512: gcc should keep value in kN registers if possible
Date: Wed, 12 Dec 2018 11:00:00 -0000
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--- Comment #3 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
Good catch, mask should be 16-bit. Here is fixed version:
[code]
#include <immintrin.h>
#include <stdint.h>
int test(uint16_t* data, int a)
{
__m128i v = _mm_load_si128((const __m128i*)data);
__mmask16 m = _mm_testn_epi16_mask(v, v);
m = _kshiftli_mask16(m, 1);
m = _kandn_mask16(m, a);
return m;
}
[/code]
[asm]
test(unsigned short*, int):
vmovdqa64 xmm0, XMMWORD PTR [rdi]
kmovw k4, esi
vptestnmw k1, xmm0, xmm0
kmovb eax, k1
kmovw k2, eax
kshiftlw k0, k2, 1
kandnw k3, k0, k4
kmovw eax, k3
ret
[/asm]
This still can be optimized, there is no need to move value from k1 to eax and
then to k2 - vptestnmw zeroes upper bits if k register.
>From gcc-bugs-return-625607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 11:02:11 2018
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Subject: [Bug c/87334] RFE: Add '__builtin_ms_va_list' support to ARM64
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
>From gcc-bugs-return-625608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 11:07:38 2018
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Subject: [Bug target/86264] [ARM] unsupported v2/v3 code remaining
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--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
libffi is an upstream project, so they can remove support for older
architectures on their own timescales.
>From gcc-bugs-return-625609-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 11:16:25 2018
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Subject: [Bug driver/64094] "No such file or directory" -> "No such file"
Date: Wed, 12 Dec 2018 11:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64094
--- Comment #9 from Jonny Grant <jg at jguk dot org> ---
(In reply to Jonny Grant from comment #6)
> (2)
> $ mkdir testdir.cpp
>
> $ gcc -o main testdir.cpp
> cc1plus: fatal error: testdir.cpp: No such file or directory
> compilation terminated.
Can files be checked that they are files? a quick stat() on each of them before
passing them along?
eg. stat() and then S_ISDIR(statbuf.st_mode) and display strerror(EISDIR), then
check if a regular file with S_ISREG(statbuf.st_mode)
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Subject: [Bug target/86264] [ARM] unsupported v2/v3 code remaining
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
And longlong.h comes from glibc. So neither of the files mentioned is a master
copy in GCC.
Rejecting on that basis
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Subject: [Bug target/88451] No rounding in fixed-point arithmetic (Decimal to fixed-point conversion, multiplication)
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--- Comment #3 from Mantas Mikaitis <mantas.mikaitis at manchester dot ac.uk> ---
Also confirmed on GCC version 7.3.0.
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Subject: [Bug target/88451] No rounding in fixed-point arithmetic (Decimal to fixed-point conversion, multiplication)
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Mantas Mikaitis <mantas.mikaitis at manchester dot ac.uk> changed:
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CC| |mantas.mikaitis@manchester.
| |ac.uk
--- Comment #4 from Mantas Mikaitis <mantas.mikaitis at manchester dot ac.uk> ---
Created attachment 45214
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45214&action=edit
Fixed testcases
Uploaded an update to the testcase - compare as accums not integers.
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Subject: [Bug target/86806] SPARC port needs updating for CVE-2017-5753
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Wed Dec 12 11:40:28 2018
New Revision: 267053
URL: https://gcc.gnu.org/viewcvs?rev=267053&root=gcc&view=rev
Log:
PR target/86806
* config/sparc/sparc.md (unspecv): Add UNSPECV_SPECULATION_BARRIER.
(speculation_barrier): New instruction for V9.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sparc/sparc.md
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
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Subject: [Bug target/86772] [meta-bug] tracking port status for CVE-2017-5753
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Bug 86772 depends on bug 86806, which changed state.
Bug 86806 Summary: SPARC port needs updating for CVE-2017-5753
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86806
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/88326] ICE in gfc_conv_array_initializer, at fortran/trans-array.c:6085
Date: Wed, 12 Dec 2018 11:46:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-12
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Affects versions down to at least gcc-5 :
Confirmed down to 4.7.3, compiling with 4.6.4 gives an error
Error: Different shape for array assignment at (1) on dimension 1 (1 and 0)
>From gcc-bugs-return-625617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 12:33:36 2018
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From: "vinay.m.engg at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/83377] Missed optimization (x86): Bit operations should be converted to arithmetic
Date: Wed, 12 Dec 2018 12:33:00 -0000
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--- Comment #4 from Vinay Kumar <vinay.m.engg at gmail dot com> ---
Hi,
Above mentioned patch does not work for the pattern "if( x & 2 ) y = (x &
~2UL)".
>> Probably still easier to fix in combine / simplify-rtx.
We are working as per your suggestion.
Regards,
Vinay
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Subject: [Bug rtl-optimization/87727] [9 regression] gcc.target/sparc/overflow-2.c FAILs
Date: Wed, 12 Dec 2018 12:34:00 -0000
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--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Created attachment 45215
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45215&action=edit
Tentative fix
Or rather tentative kludge because, if someone has a better idea...
>From gcc-bugs-return-625619-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 12:42:27 2018
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Subject: [Bug c++/86524] [8/9 Regression] std::less with pointer arguments not usable in static_assert in constexpr function
Date: Wed, 12 Dec 2018 12:42:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45216
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45216&action=edit
gcc9-pr86524.patch
Untested fix.
>From gcc-bugs-return-625620-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 12:43:34 2018
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Subject: [Bug c++/88446] __builtin_is_constant_evaluated rejects some converted constant expressions.
Date: Wed, 12 Dec 2018 12:43:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45217
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gcc9-pr86524.patch
Untested fix for the static_assert issue.
>From gcc-bugs-return-625621-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 13:35:59 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/65725] Bootstrap errors on Solaris 10 x86-64, including object diffs
Date: Wed, 12 Dec 2018 13:35:00 -0000
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--- Comment #9 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #8 from Daniel Richard G. <skunk at iskunk dot org> ---
Hi Daniel,
> I tested this again with GCC 8.2.0 on the same system, using as/ld, and am
> still seeing the object diffs. Would it help if I provided a copy of the
> objects at issue?
it would be helpful to know a bit more about that system: Solaris 10
update release (e.g. from /etc/release), versions of as (as -V) and ld
(ld -V), bootstrap compiler used, version of cmp (and do_compare setting
in the toplevel Makefile).
To investigate comparison failures, it's usually necessary to have both
a few of the object pairs failing the comparison and the corresponding
.s files from -save-temps. You've to be very careful to rerun the exact
compiler invocations from exactly the same directories which can be
tricky due to all the shuffling around due to the different stages.
Rainer
>From gcc-bugs-return-625622-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 13:36:33 2018
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Subject: [Bug rtl-optimization/83377] Missed optimization (x86): Bit operations should be converted to arithmetic
Date: Wed, 12 Dec 2018 13:36:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Vinay Kumar from comment #3)
> The below mentioned pattern match in match.pd generates the assembly code
> similar to subtraction.
> ==========================================
> diff --git a/gcc/match.pd b/gcc/match.pd
> index fbb4d6f..3cde6a6 100644
> --- a/gcc/match.pd
> +++ b/gcc/match.pd
> @@ -925,6 +925,11 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
> (bit_and @0 integer_all_onesp)
> (non_lvalue @0))
>
> +/*Fold (x & ~CST) into (x - CST)*/
> +(simplify(bit_and:c @0 INTEGER_CST@1)
> +(if ((INTEGRAL_TYPE_P (type) || VECTOR_INTEGER_TYPE_P (type)))
> + (minus @0 (negate @1))))
> +
That is completely invalid transformation.
Have you actually tried it?
The reason you can do what is in #c0 is because the test guarantees you
corresponding bit (has to be a single one) is set and so the subtraction works
like masking off that single bit.
In the RTL passes (e.g. combiner) I don't think we have information on
guaranteed set bits, we have just information on guaranteed zero bits (through
nonzero_bits).
Not sure if GIMPLE ccp can handle this or not, at least in theory it could
because it has a constant and mask for each SSA_NAME. Dunno if it has
something similar to VRP assert expressions though or derives something from
the edge state.
>From gcc-bugs-return-625623-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 13:46:24 2018
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From: "mokreutzer at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88464] New: AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Wed, 12 Dec 2018 13:46:00 -0000
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Bug ID: 88464
Summary: AVX-512 vectorization of masked scatter failing with
"not suitable for scatter store"
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
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Hi,
I have the following simple loop which I want to compile for Skylake (AVX-512):
================================
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
{
if (b[off1[i]] < b[off2[i]])
a[off1[i]] = b[off1[i]];
else
a[off2[i]] = b[off2[i]];
}
================================
Given AVX-512 masked scatter instructions and the absence of data conflicts
("ivdep"), vectorization should be possible along the lines of:
1. gather b[off1[i]] into zmm1
2. gather b[off2[i]] into zmm2
3. compare zmm1 and zmm2 with "<" and store result in mask1
4. compare zmm1 and zmm2 with ">=" and store result in mask2
5. scatter zmm1 to a[off1[i]] with mask1
6. scatter zmm2 to a[off2[i]] with mask2
However, GCC is not able to vectorize this loop (failing with "not vectorized:
not suitable for scatter store"). I have tested this with the latest GCC trunk
but the issue also occurs with all previous versions. If you want to have a
look, here's a Godbolt example: https://godbolt.org/z/Is7Zml
I understand that this loop is not a trivial case for vectorization and AVX-512
hasn't been around for too long, so it's likely that it isn't fully supported
yet. But still, I'm wondering:
1. Am I missing some flags or hints to GCC in order to vectorize this loop? (I
can imagine something related to the cost model, etc..)
2. Or is GCC currently just not capable of vectorizing it?
If the answer is "2.":
3. Can we estimate to amount of work needed to support this?
4. Is there any plan on when this kind of pattern will be supported?
5. If it's realistic for a non-GCC developer to look into this, is there
anything I can do to help?
Many thanks in advance,
Moritz
>From gcc-bugs-return-625624-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 13:49:08 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 rtl-optimization/83377] Missed optimization (x86): Bit operations should be converted to arithmetic
Date: Wed, 12 Dec 2018 13:49:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
CCP does not have conditional information here (given it is based on SSA
propagation and doesn't insert ASSERT_EXPRs). The bit-tracking infrastructure
would need to be added for example to EVRP where conditional information
can be tracked. Still even SSA only has nonzero-bits and not the full
lattice the CCP machinery computes.
Note since the transform is to combine the and with AGU doing this on RTL
looks more appropriate (even if similarly difficult).
0: 40 f6 c7 02 test $0x2,%dil
4: 74 07 je d <b+0xd>
6: 48 83 e7 fd and $0xfffffffffffffffd,%rdi
a 3-insn peephole could do the trick? Or doesn't that work with control-flow?
I fear we have no RTL pass doing sth like VRP or bit tracking conditionally
(so even nonzero bits wouldn't work here, no?)
>From gcc-bugs-return-625625-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 14:01:49 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 tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Wed, 12 Dec 2018 14:01:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-12
CC| |jakub at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Component|c |tree-optimization
Blocks| |53947
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. The issue here is the target doesn't advertise scatter:
3901 if (targetm.vectorize.builtin_scatter)
(gdb) n
3902 decl = targetm.vectorize.builtin_scatter (vectype, offtype,
scale);
(gdb)
3905 if (!decl)
(gdb) p decl
$5 = (tree) 0x0
(gdb) p decl
$5 = (tree) 0x0
(gdb) p debug_generic_expr (vectype)
vector(4) double
$6 = void
(gdb) p debug_generic_expr (offtype)
int
$7 = void
(gdb) p scale
$8 = 8
probably because of the "mixup" of 4-byte index and 8 byte store element type.
I'm not sure whether Jakub implemented widening of the index at all.
OTOH when using long for idx it doesn't help. Using -march=knl we get
a little bit further but ultimately fail the same way.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
>From gcc-bugs-return-625626-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 14:04:36 2018
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Subject: [Bug d/88462] All D execution tests FAIL on Solaris/SPARC
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--- Comment #1 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Does it appear to be the correct alignment at compile-time?
This just prints the what the front-end determines. Not discounting these
values somehow change during translation to gcc trees.
---
import core.sys.posix.sys.types;
import core.sync.mutex;
pragma(msg, pthread_mutex_t.alignof);
pragma(msg, Mutex.alignof);
pragma(msg, Mutex.m_hndl.offsetof);
>From gcc-bugs-return-625627-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 14:05:00 2018
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Subject: [Bug fortran/88326] ICE in gfc_conv_array_initializer, at fortran/trans-array.c:6085
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Priority|P3 |P4
Blocks| |31237
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The change occurred between revisions r188694 (2012-06-16, error) and r188914
(2012-06-24, ICE).
Note that the third test in comment 0 compiles with r188694.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31237
[Bug 31237] [meta-bug] TRANSFER intrinsic
>From gcc-bugs-return-625628-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 14:06:40 2018
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Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Wed, 12 Dec 2018 14:06:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I haven't been involved with the scatters, only gathers. So guess the first
step would be try something similar with gathers only and see if we vectorize
that and see what is different for scatters.
>From gcc-bugs-return-625629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 14:10:15 2018
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Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kirill.yukhin at intel dot com
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks like there are no scatter patterns with DFmode, only SFmode ones? But
even
void loop (float * __restrict__ a, float const * __restrict__ b, int const *
__restrict__ off1, int const * __restrict__ off2, int n)
{
#if defined(__clang__)
#pragma clang loop vectorize(assume_safety)
#elif defined(__GNUC__)
#pragma GCC ivdep
#endif
for (int i = 0; i < n; ++i)
{
if (b[i] < b[i])
a[off1[i]] = b[i];
else
a[off2[i]] = b[i];
}
}
doesn't work.
>From gcc-bugs-return-625630-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 14:13:12 2018
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Subject: [Bug d/88462] All D execution tests FAIL on Solaris/SPARC
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--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> pragma(msg, pthread_mutex_t.alignof);
> pragma(msg, Mutex.alignof);
> pragma(msg, Mutex.m_hndl.offsetof);
I get
8u
4u
/homes/ro/mutex_align.d:6:13: error: class core.sync.mutex.Mutex member m_hndl
is not accessible
16u
The first is right, but Mutex alignment is off, probably leading to the
4-byte alignment of m_hndl I'm seeing.
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Subject: [Bug fortran/88356] [9 Regression] ICE with -Werror in reduce_binary_ac, at fortran/arith.c:1318 (and others)
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |error-recovery
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-12
Known to work| |8.2.0
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> This changed between 20180624 and 20180708.
Confirmed before 2018-07-03 (r262339).
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Subject: [Bug fortran/88342] Possible bug with IEEE_POSITIVE_INF and -ffpe-trap=overflow
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Is it a bug in gfortran?
>From gcc-bugs-return-625633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 14:21:17 2018
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Subject: [Bug target/88461] AVX512: gcc should keep value in kN registers if possible
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
What we can do easily, but not sure if it won't lead to worse code for non-mask
code, would be to add either =k, km or =*k, *km alternatives to the various
zeroextend?i?i2 patterns, all we have right now are the mov?i_internal
patterns.
Because even the mov?i_internal patterns use *, perhaps best to use just that.
For this testcase that would still imply a kmov* instruction.
If we want to go further, we'd need patterns for the instructions that set
masks (comparisons etc.), which would contain zero_extend around the mask to
wider modes. That implies two iterators and guess it wouldn't play nicely with
define_subst, so we'd need to do that manually.
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Subject: [Bug c/88465] New: AVX512: optimize loading of constant values to kN registers
Date: Wed, 12 Dec 2018 14:53:00 -0000
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Bug ID: 88465
Summary: AVX512: optimize loading of constant values to kN
registers
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When constant value is loaded into kN register, gcc puts it into eax first, and
then moved to kN register:
[code]
#include <immintrin.h>
#include <stdint.h>
__mmask8 test(__mmask8 m)
{
__mmask8 m2 = _kand_mask8(m, 3);
return m2;
}
[/code]
[asm]
test(unsigned char):
mov eax, 3
kmovb k1, eax
kmovb k2, edi
kandb k0, k1, k2
kmovb eax, k0
ret
[/asm]
icc uses one instruction for this. https://godbolt.org/ displayed it as "null",
but most probably this is wrong name:
[asm]
test(unsigned char):
vkmovb k0, edi #6.19
null k1, 3 #6.19
kandb k2, k0, k1 #6.19
vkmovb eax, k2 #6.19
ret #7.12
[/asm]
You can also use instructions kxor and kxnor to load 0 and -1.
>From gcc-bugs-return-625635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 14:57:00 2018
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Subject: [Bug target/88461] AVX512: gcc should keep value in kN registers if possible
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45218
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45218&action=edit
gcc9-pr88461.patch
Patch I've tried, but it doesn't change anything on this testcase (not even if
I remove all those *s or use ^s, in the new alternatives as well as in
mov?i_internal (only movhi_internal had the alternative just as =k, km before).
>From gcc-bugs-return-625636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 15:16:21 2018
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Subject: [Bug c++/52869] [DR 1207] "this" not being allowed in noexcept clauses
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-625637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 15:25:26 2018
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Subject: [Bug debug/86964] Too many debug symbols included, especially for extern globals
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--- Comment #4 from Thomas De Schampheleire <patrickdepinguin at gmail dot com> ---
I am suffering from this same problem using gcc 7.3.0 on a Broadcom SDK.
Due to this, compiled object files increase from 90 KiB (using gcc 4.9.2) to 15
MiB (gcc 7.3.0). This size increase is enormous.
Aside from the fact that the disk space need becomes very large (don't know the
total number, but it is definitely larger than 32 GiB), the final link step
actually failed due to it.
>From gcc-bugs-return-625639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 15:29:44 2018
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Subject: [Bug d/88462] All D execution tests FAIL on Solaris/SPARC
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--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #2)
> > pragma(msg, pthread_mutex_t.alignof);
> > pragma(msg, Mutex.alignof);
> > pragma(msg, Mutex.m_hndl.offsetof);
>
> I get
>
> 8u
> 4u
> /homes/ro/mutex_align.d:6:13: error: class core.sync.mutex.Mutex member
> m_hndl is not accessible
> 16u
>
> The first is right, but Mutex alignment is off, probably leading to the
> 4-byte alignment of m_hndl I'm seeing.
Oh wait, Mutex is a class, so of course the alignment is 4. Classes are
reference types, so of course alignof would be the pointer.
>From gcc-bugs-return-625638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 15:29:10 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/88466] New: Support std::hardware_destructive_interference_size and std:: hardware_constructive_interference_size
Date: Wed, 12 Dec 2018 15:29:00 -0000
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Bug ID: 88466
Summary: Support std::hardware_destructive_interference_size
and std:: hardware_constructive_interference_size
Product: gcc
Version: 9.0
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The following should compile:
#include <new>
struct x {
alignas(std::hardware_destructive_interference_size) int y;
alignas(std::hardware_constructive_interference_size) int z;
};
It seems, however, that neither std::hardware_destructive_interference_size nor
std::hardware_constructive_interference_size have been included in libstdc++.
>From gcc-bugs-return-625640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 16:00:02 2018
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Subject: [Bug target/88461] AVX512: gcc should keep value in kN registers if possible
Date: Wed, 12 Dec 2018 16:00:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45219
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45219&action=edit
gcc9-pr88461-2.patch
Patch that seems to work for me (though, it adjusts just the vptest{,n}m
patterns and nothing else.
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Subject: [Bug libstdc++/80762] is_constructible<filesystem::path, void> gives hard error with clang
Date: Wed, 12 Dec 2018 16:14:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Dec 12 16:13:43 2018
New Revision: 267056
URL: https://gcc.gnu.org/viewcvs?rev=267056&root=gcc&view=rev
Log:
PR libstdc++/80762 avoid ambiguous __constructible_from<void, void>
Ensure we don't try to instantiate __is_constructible_from<void, void>,
because there are two partial specializations that are equally good
matches.
PR libstdc++/80762
* include/bits/fs_path.h (path::_Path): Use remove_cv_t and is_void.
* include/experimental/bits/fs_path.h (path::_Path): Likewise.
* testsuite/27_io/filesystem/path/construct/80762.cc: New test.
* testsuite/experimental/filesystem/path/construct/80762.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/27_io/filesystem/path/construct/80762.cc
trunk/libstdc++-v3/testsuite/experimental/filesystem/path/construct/80762.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/fs_path.h
trunk/libstdc++-v3/include/experimental/bits/fs_path.h
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Subject: [Bug libstdc++/71044] Optimize std::filesystem implementation
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71044
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Dec 12 16:13:49 2018
New Revision: 267057
URL: https://gcc.gnu.org/viewcvs?rev=267057&root=gcc&view=rev
Log:
Overload std::distance and std::advance for path::iterator
Although filesystem::path::iterator is only a bidirectional iterator,
the underlying sequence has random access iterators (specifically, raw
pointers). This means std::distance and std::advance can be implemented
more efficiently than the generic versions which apply ++ and --
repeatedly.
PR libstdc++/71044 (partial)
* include/bits/fs_path.h (__path_iter_distance, __path_iter_advance):
New friend functions to implement std::distance and std::advance more
efficiently.
(distance, advance): Add overloads for path::iterator.
* testsuite/27_io/filesystem/path/itr/components.cc: Test new
overload.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/fs_path.h
trunk/libstdc++-v3/testsuite/27_io/filesystem/path/itr/traversal.cc
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Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Wed, 12 Dec 2018 16:28:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
>From gcc-bugs-return-625644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 16:31:21 2018
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Subject: [Bug target/88465] AVX512: optimize loading of constant values to kN registers
Date: Wed, 12 Dec 2018 16:31:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I can't find any instruction that would set a mask register directly to an
immediate, besides the 0 and -1 cases you've mentioned (which could be used
also for 255, 65535 and 0xffffffff constants).
>From gcc-bugs-return-625645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 16:35:03 2018
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Subject: [Bug testsuite/88454] [9 regression] test case gcc.dg/tree-ssa/split-path-5.c fails after r266971
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samtebbs at gcc dot gnu.org changed:
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--- Comment #3 from samtebbs at gcc dot gnu.org ---
Confirmed on arm and aarch64
>From gcc-bugs-return-625646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 16:36:32 2018
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Subject: [Bug libstdc++/88466] [C++17] Support std::hardware_destructive_interference_size and std:: hardware_constructive_interference_size
Date: Wed, 12 Dec 2018 16:36:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Hmm, these are interesting defined on some architures. On AARCH64, there are
at least two different values that can be defined here (I suspect it should be
the min of the two), 128 and 64 but architurially the min is 16 (IIRC).
I think hardware_destructive_interference_size is not well enough documented
to use correctly. Because if it was defined as the min value, then 64 which
is not correct for targets where 128 bytes cache line size (e.g. OcteonTX and
OcteonTX2), because someone would try to use it to align a variable/field to be
away from another variable/field and it would be incorrect.
>From gcc-bugs-return-625647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 16:36:42 2018
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Subject: [Bug testsuite/88454] [9 regression] test case gcc.dg/tree-ssa/split-path-5.c fails after r266971
Date: Wed, 12 Dec 2018 16:36:00 -0000
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--- Comment #4 from samtebbs at gcc dot gnu.org ---
The split-path-11.c failure isn't happening on aarch64 and arm as of r267031
but the split-path-11.c failure still is.
>From gcc-bugs-return-625648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 16:39:43 2018
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From: "duarte at scylladb dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/88466] [C++17] Support std::hardware_destructive_interference_size and std:: hardware_constructive_interference_size
Date: Wed, 12 Dec 2018 16:39:00 -0000
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--- Comment #2 from Duarte <duarte at scylladb dot com> ---
I don't think it should be the min size. For example, architectures with 64bit
cache lines can have prefetchers that immediately fetch adjacent cache lines,
in which case the value should be 128.
One option could be to just use whatever values linux uses :)
>From gcc-bugs-return-625649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 16:52:02 2018
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Subject: [Bug fortran/88047] [9 Regression] ICE in gfc_find_vtab, at fortran/class.c:2843
Date: Wed, 12 Dec 2018 16:52:00 -0000
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--- Comment #5 from G. Steinmetz <gscfq@t-online.de> ---
A related test case, also changed between 20180909 and 20180916 :
$ cat z2.f90
program p
type t
integer :: n
end type
class(t) :: a, x
x = a
end
$ gfortran-9-20180909 -c z2.f90
z2.f90:5:16:
5 | class(t) :: a, x
| 1
Error: CLASS variable 'a' at (1) must be dummy, allocatable or pointer
z2.f90:5:19:
5 | class(t) :: a, x
| 1
Error: CLASS variable 'x' at (1) must be dummy, allocatable or pointer
z2.f90:6:3:
6 | x = a
| 1
Error: Nonallocatable variable must not be polymorphic in intrinsic assignment
at (1) - check that there is a matching specific subroutine for '=' operator
$ gfortran-9-20181209 -c z2.f90
f951: internal compiler error: Segmentation fault
0xb2f31f crash_signal
../../gcc/toplev.c:326
0x5fb831 gfc_find_derived_vtab(gfc_symbol*)
../../gcc/fortran/class.c:2220
0x5ff91b gfc_find_vtab(gfc_typespec*)
../../gcc/fortran/class.c:2847
0x64d572 gfc_match_assignment()
../../gcc/fortran/match.c:1378
0x66f120 match_word
../../gcc/fortran/parse.c:65
0x66f120 decode_statement
../../gcc/fortran/parse.c:361
0x670c7a next_free
../../gcc/fortran/parse.c:1235
0x670c7a next_statement
../../gcc/fortran/parse.c:1467
0x67228b parse_spec
../../gcc/fortran/parse.c:3859
0x674d2c parse_progunit
../../gcc/fortran/parse.c:5674
0x6763a9 gfc_parse_file()
../../gcc/fortran/parse.c:6214
0x6bf27f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug fortran/88467] New: Silently accepts wrong array constructor
Date: Wed, 12 Dec 2018 16:55:00 -0000
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Bug ID: 88467
Summary: Silently accepts wrong array constructor
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Target Milestone: ---
Extracted from pr88116. Silently accepts these array
constructors and consequently prints wrong results :
$ cat z1.f90
program p
print *, [integer :: 1, [integer(1) :: '3', 4]]
print *, [integer :: 1, [integer(2) :: '3', 4]]
print *, [integer :: 1, [integer(8) :: '3', 4]]
print *, [integer :: 1, [integer(16) :: '3', 4]]
end
$ cat z2.f90
program p
print *, [integer :: 1, [integer(1) :: 2, '3']]
print *, [integer :: 1, [integer(2) :: 2, '3']]
print *, [integer :: 1, [integer(8) :: 2, '3']]
print *, [integer :: 1, [integer(16) :: 2, '3']]
end
$ cat z3.f90
program p
print *, [integer(8) :: 1, [integer(4) :: 2, '3']]
end
$ gfortran-9-20181209 z1.f90 -static-libgfortran
$ a.out
1 0 4
1 0 4
1 0 4
1 0 4
$ gfortran-9-20181209 z3.f90 -static-libgfortran
$ a.out
1 2 0
$
>From gcc-bugs-return-625651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 16:55:47 2018
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Subject: [Bug fortran/88467] Silently accepts wrong array constructor
Date: Wed, 12 Dec 2018 16:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88467
--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
Detected, as noted in pr88116 comment 5 :
$ cat z4.f90
program p
print *, [integer :: 1, [integer(4) :: 2, '3']]
end
$ gfortran-9-20181209 -c z4.f90
z4.f90:2:44:
2 | print *, [integer :: 1, [integer(4) :: 2, '3']]
| 1
Error: Can't convert CHARACTER(1) to INTEGER(4) at (1)
And also :
$ cat z8.f90
program p
print *, [integer(8) :: 1, [integer(8) :: 2, '3']]
end
$ gfortran-9-20181209 -c z8.f90
z8.f90:2:47:
2 | print *, [integer(8) :: 1, [integer(8) :: 2, '3']]
| 1
Error: Can't convert CHARACTER(1) to INTEGER(8) at (1)
>From gcc-bugs-return-625652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 16:56:12 2018
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From: "jm.feuggelen at orange dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88468] New: Arduino: 1.8.8 (Windows 10) internal compiler error , segmentation fault
Date: Wed, 12 Dec 2018 16:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88468
Bug ID: 88468
Summary: Arduino: 1.8.8 (Windows 10) internal compiler error ,
segmentation fault
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jm.feuggelen at orange dot fr
Target Milestone: ---
Arduino: 1.8.8 (Windows 10), Board: "Arduino/Genuino Uno"
C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine
-hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files
(x86)\Arduino\tools-builder -tools C:\Program Files
(x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files
(x86)\Arduino\libraries -libraries D:\ARDUINO ALLES\TEST ARDUINO\libraries
-fqbn=arduino:avr:uno -vid-pid=0X2341_0X0043 -ide-version=10808 -build-path
C:\Users\f8voa\AppData\Local\Temp\arduino_build_873918 -warnings=default
-build-cache C:\Users\f8voa\AppData\Local\Temp\arduino_cache_939549
-prefs=build.warn_data_percentage=75
-prefs=runtime.tools.arduinoOTA.path=C:\Program Files
(x86)\Arduino\hardware\tools\avr
-prefs=runtime.tools.arduinoOTA-1.2.1.path=C:\Program Files
(x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program
Files (x86)\Arduino\hardware\tools\avr
-prefs=runtime.tools.avrdude-6.3.0-arduino14.path=C:\Program Files
(x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program
Files (x86)\Arduino\hardware\tools\avr
-prefs=runtime.tools.avr-gcc-5.4.0-atmel3.6.1-arduino2.path=C:\Program Files
(x86)\Arduino\hardware\tools\avr -verbose D:\ARDUINO ALLES\TEST
ARDUINO\drawBitmap_1_kbv\drawBitmap_1_kbv.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine
-hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files
(x86)\Arduino\tools-builder -tools C:\Program Files
(x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files
(x86)\Arduino\libraries -libraries D:\ARDUINO ALLES\TEST ARDUINO\libraries
-fqbn=arduino:avr:uno -vid-pid=0X2341_0X0043 -ide-version=10808 -build-path
C:\Users\f8voa\AppData\Local\Temp\arduino_build_873918 -warnings=default
-build-cache C:\Users\f8voa\AppData\Local\Temp\arduino_cache_939549
-prefs=build.warn_data_percentage=75
-prefs=runtime.tools.arduinoOTA.path=C:\Program Files
(x86)\Arduino\hardware\tools\avr
-prefs=runtime.tools.arduinoOTA-1.2.1.path=C:\Program Files
(x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program
Files (x86)\Arduino\hardware\tools\avr
-prefs=runtime.tools.avrdude-6.3.0-arduino14.path=C:\Program Files
(x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program
Files (x86)\Arduino\hardware\tools\avr
-prefs=runtime.tools.avr-gcc-5.4.0-atmel3.6.1-arduino2.path=C:\Program Files
(x86)\Arduino\hardware\tools\avr -verbose D:\ARDUINO ALLES\TEST
ARDUINO\drawBitmap_1_kbv\drawBitmap_1_kbv.ino
Using board 'uno' from platform in folder: C:\Program Files
(x86)\Arduino\hardware\arduino\avr
Using core 'arduino' from platform in folder: C:\Program Files
(x86)\Arduino\hardware\arduino\avr
Detecting libraries used...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os
-w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections
-fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E
-CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10808 -DARDUINO_AVR_UNO
-DARDUINO_ARCH_AVR "-IC:\\Program Files
(x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files
(x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard"
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\sketch\\drawBitmap_1_kbv.ino.cpp"
-o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os
-w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections
-fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E
-CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10808 -DARDUINO_AVR_UNO
-DARDUINO_ARCH_AVR "-IC:\\Program Files
(x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files
(x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Program
Files (x86)\\Arduino\\libraries\\MCUFRIEND_kbv-2.9.8"
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\sketch\\drawBitmap_1_kbv.ino.cpp"
-o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os
-w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections
-fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E
-CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10808 -DARDUINO_AVR_UNO
-DARDUINO_ARCH_AVR "-IC:\\Program Files
(x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files
(x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Program
Files (x86)\\Arduino\\libraries\\MCUFRIEND_kbv-2.9.8" "-IC:\\Program Files
(x86)\\Arduino\\libraries\\Adafruit_GFX_Library"
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\sketch\\drawBitmap_1_kbv.ino.cpp"
-o nul
Using cached library dependencies for file: C:\Program Files
(x86)\Arduino\libraries\MCUFRIEND_kbv-2.9.8\MCUFRIEND_kbv.cpp
Using cached library dependencies for file: C:\Program Files
(x86)\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp
Using cached library dependencies for file: C:\Program Files
(x86)\Arduino\libraries\Adafruit_GFX_Library\Adafruit_SPITFT.cpp
Using cached library dependencies for file: C:\Program Files
(x86)\Arduino\libraries\Adafruit_GFX_Library\glcdfont.c
Using cached library dependencies for file: C:\Program Files
(x86)\Arduino\hardware\arduino\avr\libraries\SPI\src\SPI.cpp
Generating function prototypes...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os
-w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections
-fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E
-CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10808 -DARDUINO_AVR_UNO
-DARDUINO_ARCH_AVR "-IC:\\Program Files
(x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files
(x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Program
Files (x86)\\Arduino\\libraries\\MCUFRIEND_kbv-2.9.8" "-IC:\\Program Files
(x86)\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Program Files
(x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src"
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\sketch\\drawBitmap_1_kbv.ino.cpp"
-o
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\preproc\\ctags_target_for_gcc_minus_e.cpp"
"C:\\Program Files (x86)\\Arduino\\tools-builder\\ctags\\5.8-arduino11/ctags"
-u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns
--line-directives
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\preproc\\ctags_target_for_gcc_minus_e.cpp"
Compiling sketch...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os
-std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections
-fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega328p
-DF_CPU=16000000L -DARDUINO=10808 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR
"-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino"
"-IC:\\Program Files
(x86)\\Arduino\\hardware\\arduino\\avr\\variants\\standard" "-IC:\\Program
Files (x86)\\Arduino\\libraries\\MCUFRIEND_kbv-2.9.8" "-IC:\\Program Files
(x86)\\Arduino\\libraries\\Adafruit_GFX_Library" "-IC:\\Program Files
(x86)\\Arduino\\hardware\\arduino\\avr\\libraries\\SPI\\src"
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\sketch\\drawBitmap_1_kbv.ino.cpp"
-o
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\sketch\\drawBitmap_1_kbv.ino.cpp.o"
Compiling libraries...
Compiling library "MCUFRIEND_kbv-2.9.8"
Using previously compiled file:
C:\Users\f8voa\AppData\Local\Temp\arduino_build_873918\libraries\MCUFRIEND_kbv-2.9.8\MCUFRIEND_kbv.cpp.o
Compiling library "Adafruit_GFX_Library"
Using previously compiled file:
C:\Users\f8voa\AppData\Local\Temp\arduino_build_873918\libraries\Adafruit_GFX_Library\glcdfont.c.o
Using previously compiled file:
C:\Users\f8voa\AppData\Local\Temp\arduino_build_873918\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp.o
Using previously compiled file:
C:\Users\f8voa\AppData\Local\Temp\arduino_build_873918\libraries\Adafruit_GFX_Library\Adafruit_SPITFT.cpp.o
Compiling library "SPI"
Using previously compiled file:
C:\Users\f8voa\AppData\Local\Temp\arduino_build_873918\libraries\SPI\SPI.cpp.o
Compiling core...
Using precompiled core:
C:\Users\f8voa\AppData\Local\Temp\arduino_cache_939549\core\core_arduino_avr_uno_0c812875ac70eb4a9b385d8fb077f54c.a
Linking everything together...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-gcc" -Os -g
-flto -fuse-linker-plugin -Wl,--gc-sections -mmcu=atmega328p -o
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918/drawBitmap_1_kbv.ino.elf"
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\sketch\\drawBitmap_1_kbv.ino.cpp.o"
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\libraries\\MCUFRIEND_kbv-2.9.8\\MCUFRIEND_kbv.cpp.o"
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\libraries\\Adafruit_GFX_Library\\Adafruit_GFX.cpp.o"
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\libraries\\Adafruit_GFX_Library\\Adafruit_SPITFT.cpp.o"
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\libraries\\Adafruit_GFX_Library\\glcdfont.c.o"
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918\\libraries\\SPI\\SPI.cpp.o"
"C:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918/..\\arduino_cache_939549\\core\\core_arduino_avr_uno_0c812875ac70eb4a9b385d8fb077f54c.a"
"-LC:\\Users\\f8voa\\AppData\\Local\\Temp\\arduino_build_873918" -lm
D:\ARDUINO ALLES\TEST ARDUINO\drawBitmap_1_kbv\drawBitmap_1_kbv.ino: In
function 'msg_time.constprop':
D:\ARDUINO ALLES\TEST ARDUINO\drawBitmap_1_kbv\drawBitmap_1_kbv.ino:89:1:
internal compiler error: Segmentation fault
}
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
lto-wrapper.exe: fatal error: C:\Program Files
(x86)\Arduino\hardware\tools\avr/bin/avr-gcc returned 1 exit status
compilation terminated.
c:/program files
(x86)/arduino/hardware/tools/avr/bin/../lib/gcc/avr/5.4.0/../../../../avr/bin/ld.exe:
error: lto-wrapper failed
collect2.exe: error: ld returned 1 exit status
Using library MCUFRIEND_kbv-2.9.8 at version 2.9.8 in folder: C:\Program Files
(x86)\Arduino\libraries\MCUFRIEND_kbv-2.9.8
Using library Adafruit_GFX_Library at version 1.3.4 in folder: C:\Program Files
(x86)\Arduino\libraries\Adafruit_GFX_Library
Using library SPI at version 1.0 in folder: C:\Program Files
(x86)\Arduino\hardware\arduino\avr\libraries\SPI
exit status 1
Error compiling for board Arduino/Genuino Uno.
>From gcc-bugs-return-625654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 16:59:35 2018
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Subject: [Bug fortran/88116] [8/9 Regression] ICE in gfc_convert_constant(): Unexpected type
Date: Wed, 12 Dec 2018 16:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88116
--- Comment #6 from G. Steinmetz <gscfq@t-online.de> ---
(In reply to kargl from comment #5)
> I don't know if you like to keep track of issues that you submit or not.
Maybe I could do better. But for the next couple of weeks,
I'm gonna take an absence from Bugzilla.
> Do you want to migrate this to its own PR?
This is now pr88467.
Thanks.
>From gcc-bugs-return-625653-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 16:59:22 2018
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Subject: [Bug target/88469] New: Unaligned stack access on arm (in particular armv5)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88469
Bug ID: 88469
Summary: Unaligned stack access on arm (in particular armv5)
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: stefanrin at gmail dot com
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The compiler generates unaligned stack accesses for its own code, which causes
it to trap on armv5. The disassembly of the offending function looks like this:
(configure arguments: --build=armv5tel-unknown-linux-gnueabi
--prefix=$HOME/gcc8 --enable-languages=c,c++ --with-arch=armv5te
--with-mode=arm --disable-nls)
00398e64 <_ZN11cgraph_node11create_edgeEPS_P5gcall13profile_count>:
398e64: e24dd008 sub sp, sp, #8
398e68: e92d41f0 push {r4, r5, r6, r7, r8, lr}
398e6c: e24dd018 sub sp, sp, #24
398e70: e58d3034 str r3, [sp, #52] ; 0x34
398e74: e1cd63d4 ldrd r6, [sp, #52] ; 0x34
398e78: e28d3018 add r3, sp, #24
398e7c: e1a08000 mov r8, r0
398e80: e1a05001 mov r5, r1
398e84: e59fe068 ldr lr, [pc, #104] ; 398ef4
<_ZN11cgraph_node11create_edgeEPS_P5gcall13profile_count+0x90>
398e88: e1cd61f0 strd r6, [sp, #16]
398e8c: e9130003 ldmdb r3, {r0, r1}
398e90: e3a0c000 mov ip, #0
398e94: e1a03002 mov r3, r2
398e98: e88d0003 stm sp, {r0, r1}
398e9c: e1a02005 mov r2, r5
398ea0: e59e0000 ldr r0, [lr]
398ea4: e1a01008 mov r1, r8
398ea8: e58dc008 str ip, [sp, #8]
398eac: ebffff3c bl 398ba4
<_ZN12symbol_table11create_edgeEP11cgraph_nodeS1_P5gcall13profile_countb>
398eb0: e1a04000 mov r4, r0
398eb4: eb0709d8 bl 55b61c
<_Z24initialize_inline_failedP11cgraph_edge>
398eb8: e5953044 ldr r3, [r5, #68] ; 0x44
398ebc: e5843014 str r3, [r4, #20]
398ec0: e3530000 cmp r3, #0
398ec4: 15834010 strne r4, [r3, #16]
398ec8: e5983040 ldr r3, [r8, #64] ; 0x40
398ecc: e1a00004 mov r0, r4
398ed0: e3530000 cmp r3, #0
398ed4: e584301c str r3, [r4, #28]
398ed8: 15834018 strne r4, [r3, #24]
398edc: e5884040 str r4, [r8, #64] ; 0x40
398ee0: e5854044 str r4, [r5, #68] ; 0x44
398ee4: e28dd018 add sp, sp, #24
398ee8: e8bd41f0 pop {r4, r5, r6, r7, r8, lr}
398eec: e28dd008 add sp, sp, #8
398ef0: e12fff1e bx lr
398ef4: 012f41a0 teqeq pc, r0, lsr #3
The ldrd at 398e74 is the problem. To be honest, I don't fully understand
understand this code. profile_count seems to be a struct with a 64 bit value as
its first element. From my understanding of AAPCS, this should not be stored in
r3, because it is not an even register number. But be that as it may, this
seems to store the first part of the 64 bit counter into the stack so that it
can then be loaded into r6/r7 together with its upper part. This can never be
properly aligned.
For comparison, the same function in an armv7 hardfloat build looks like this:
(configure arguments: --build=arm-linux-gnueabihf --prefix=$HOME/gcc8
--enable-languages=c,c++ --with-arch=armv7-a --with-fpu=vfpv3-d16
--with-mode=arm --with-float=hard --disable-nls --enable-multilib)
003c21e0 <_ZN11cgraph_node11create_edgeEPS_P5gcall13profile_count>:
3c21e0: e24dd008 sub sp, sp, #8
3c21e4: e309c130 movw ip, #37168 ; 0x9130
3c21e8: e340c133 movt ip, #307 ; 0x133
3c21ec: e92d4370 push {r4, r5, r6, r8, r9, lr}
3c21f0: e24dd018 sub sp, sp, #24
3c21f4: e1a05001 mov r5, r1
3c21f8: e1a06000 mov r6, r0
3c21fc: e58d3034 str r3, [sp, #52] ; 0x34
3c2200: e1a03002 mov r3, r2
3c2204: e1cd83d4 ldrd r8, [sp, #52] ; 0x34
3c2208: e1a02001 mov r2, r1
3c220c: e28d1018 add r1, sp, #24
3c2210: e3a0e000 mov lr, #0
3c2214: e1cd81f0 strd r8, [sp, #16]
3c2218: e9110003 ldmdb r1, {r0, r1}
3c221c: e58de008 str lr, [sp, #8]
3c2220: e88d0003 stm sp, {r0, r1}
3c2224: e1a01006 mov r1, r6
3c2228: e59c0000 ldr r0, [ip]
3c222c: ebffff43 bl 3c1f40
<_ZN12symbol_table11create_edgeEP11cgraph_nodeS1_P5gcall13profile_countb>
3c2230: e1a04000 mov r4, r0
3c2234: eb071320 bl 586ebc
<_Z24initialize_inline_failedP11cgraph_edge>
3c2238: e5953044 ldr r3, [r5, #68] ; 0x44
3c223c: e1a00004 mov r0, r4
3c2240: e3530000 cmp r3, #0
3c2244: e5843014 str r3, [r4, #20]
3c2248: 15834010 strne r4, [r3, #16]
3c224c: e5963040 ldr r3, [r6, #64] ; 0x40
3c2250: e3530000 cmp r3, #0
3c2254: e584301c str r3, [r4, #28]
3c2258: 15834018 strne r4, [r3, #24]
3c225c: e5864040 str r4, [r6, #64] ; 0x40
3c2260: e5854044 str r4, [r5, #68] ; 0x44
3c2264: e28dd018 add sp, sp, #24
3c2268: e8bd4370 pop {r4, r5, r6, r8, r9, lr}
3c226c: e28dd008 add sp, sp, #8
3c2270: e12fff1e bx lr
The misaligned ldrd is still there, just arranged in a different way. It may be
ok for armv7 (although this would surprise me), but it definitely is not for
armv5.
This looks very similar to #86555, but it happens in gcc's own code, so it may
not be appropriate to blame the C library in this case.
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Subject: [Bug libstdc++/88466] [C++17] Support std::hardware_destructive_interference_size and std:: hardware_constructive_interference_size
Date: Wed, 12 Dec 2018 16:59:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Duarte from comment #0)
> It seems, however, that neither std::hardware_destructive_interference_size
> nor std::hardware_constructive_interference_size have been included in
> libstdc++.
As clearly documented:
https://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.2017
The feature is broken by design and it's unclear how we want to proceed. Once
we pick a value we can never change it, because it becomes an ABI property.
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Subject: [Bug target/88465] AVX512: optimize loading of constant values to kN registers
Date: Wed, 12 Dec 2018 17:00:00 -0000
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--- Comment #2 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
I have logged issue for CompileExplorer to clarify this null instruction:
https://github.com/mattgodbolt/compiler-explorer/issues/1220
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Subject: [Bug libstdc++/88466] [C++17] Support std::hardware_destructive_interference_size and std:: hardware_constructive_interference_size
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--- Comment #4 from Duarte <duarte at scylladb dot com> ---
Oh, I see; thanks for pointing that out.
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Subject: [Bug libstdc++/80762] is_constructible<filesystem::path, void> gives hard error with clang
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk for now.
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Subject: [Bug target/88469] Unaligned stack access on arm (in particular armv5)
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-12-12
Ever confirmed|0 |1
--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Please upload a pre-processed testcase
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Subject: [Bug fortran/88463] Rejects conforming source, OpenMP Parallel region Default(None) reference to module parameter array, separate source
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-12
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from at least 4.8 up to trunk (9.0).
Workaround: use a single file.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87496
--- Comment #11 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Wed Dec 12 17:14:13 2018
New Revision: 267061
URL: https://gcc.gnu.org/viewcvs?rev=267061&root=gcc&view=rev
Log:
gcc/
Backport from mainline
2018-12-07 Peter Bergner <bergner@linux.ibm.com>
PR target/87496
* config/rs6000/rs6000.c (rs6000_option_override_internal): Disallow
-mabi=ieeelongdouble and -mabi=ibmlongdouble without -mlong-double-128.
Do not error for -mabi=ibmlongdouble and no ISA 2.06 support.
* doc/invoke.texi: Document -mabi=ibmlongdouble and
-mabi=ieeelongdouble
require -mlong-double-128.
gcc/testsuite/
Backport from mainline
2018-12-07 Peter Bergner <bergner@linux.ibm.com>
PR target/87496
* gcc.target/powerpc/pr87496.c: Rename from this...
* gcc.target/powerpc/pr87496-1.c: ...to this. Update comment.
* gcc.target/powerpc/pr87496-2.c: New test.
* gcc.target/powerpc/pr87496-3.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/pr87496-1.c
- copied, changed from r267060,
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/pr87496.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/pr87496-2.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/pr87496-3.c
Removed:
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/pr87496.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/rs6000/rs6000.c
branches/gcc-8-branch/gcc/doc/invoke.texi
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87496] ICE in aggregate_value_p at gcc/function.c:2046
Date: Wed, 12 Dec 2018 17:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87496
--- Comment #12 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Wed Dec 12 17:20:41 2018
New Revision: 267062
URL: https://gcc.gnu.org/viewcvs?rev=267062&root=gcc&view=rev
Log:
gcc/
Backport from mainline
2018-12-07 Peter Bergner <bergner@linux.ibm.com>
PR target/87496
* config/rs6000/rs6000.c (rs6000_option_override_internal): Disallow
-mabi=ieeelongdouble and -mabi=ibmlongdouble without -mlong-double-128.
Do not error for -mabi=ibmlongdouble and no ISA 2.06 support.
* doc/invoke.texi: Document -mabi=ibmlongdouble and
-mabi=ieeelongdouble
require -mlong-double-128.
gcc/testsuite/
Backport from mainline
2018-12-07 Peter Bergner <bergner@linux.ibm.com>
PR target/87496
* gcc.target/powerpc/pr87496-1.c: New test.
* gcc.target/powerpc/pr87496-2.c: New test.
* gcc.target/powerpc/pr87496-3.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr87496-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr87496-2.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr87496-3.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/rs6000/rs6000.c
branches/gcc-7-branch/gcc/doc/invoke.texi
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-625663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 17:25:10 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88336] Implement P0595R2, C++20 std::is_constant_evaluated (compiler magic library tool).
Date: Wed, 12 Dec 2018 17:25:00 -0000
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emsr at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from emsr at gcc dot gnu.org ---
This was added by Jakub Jelinek.
W00t!
>From gcc-bugs-return-625664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 17:25:14 2018
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From: "emsr at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88323] implement C++20 language features.
Date: Wed, 12 Dec 2018 17:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88323
Bug 88323 depends on bug 88336, which changed state.
Bug 88336 Summary: Implement P0595R2, C++20 std::is_constant_evaluated (compiler magic library tool).
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88336
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>From gcc-bugs-return-625665-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 17:26:40 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/88466] [C++17] Support std::hardware_destructive_interference_size and std:: hardware_constructive_interference_size
Date: Wed, 12 Dec 2018 17:26:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Duarte from comment #2)
> One option could be to just use whatever values linux uses :)
The linux kernel allows the cache line sizes to be set at boot (for some h/w)
which doesn't really map well to a constexpr variable with a fixed value.
So far the state of the art seems to be "just set them both to 64" which is a
bit pointless. We don't need two incredibly verbose ways to spell the constant
64.
We probably want a target hook, so that different target backends can customise
the value for different hardware revisions (potentially with target-specific
command-line flags to override it). Or we just set them both to 64.
>From gcc-bugs-return-625666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 17:37:40 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/88456] __atomic_compare_exchange implementation inconsistently used
Date: Wed, 12 Dec 2018 17:37:00 -0000
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--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
If the implementation were not in this source file at all and no LTO were
used, it would be unambiguous that such an out-of-line implementation
would not be used when GCC knows how to expand the relevant atomic
operation inline - GCC would have to expand it inline, regardless of
optimization level, because it couldn't rely on such an out-of-line
implementation being linked in at all.
Thus, I'd expect GCC not to inline a user-provided implementation either,
in the case where it knows how to expand the call through appropriate insn
patterns. It's not clear such inlining is a bug, however; if you provide
your own implementations of such libgcc/libatomic functions and they don't
have the required semantics, you're well into undefined behavior.
If the call is one GCC can't expand on its own (atomic operations on large
objects needing locks, architecture lacks required atomic operation
instructions, etc.), it would be reasonable for GCC to inline a definition
to which it would otherwise generate an out-of-line call.
>From gcc-bugs-return-625667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 17:40:35 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Wed, 12 Dec 2018 17:40:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, let's use a more complete testcase:
void
f1 (double * __restrict__ a, double const * __restrict__ b,
int const * __restrict__ off1, int const * __restrict__ off2, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
{
if (b[off1[i]] < b[off2[i]])
a[off1[i]] = b[off1[i]];
else
a[off2[i]] = b[off2[i]];
}
}
void
f2 (double * __restrict__ a, double const * __restrict__ b,
long const * __restrict__ off1, long const * __restrict__ off2, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
{
if (b[off1[i]] < b[off2[i]])
a[off1[i]] = b[off1[i]];
else
a[off2[i]] = b[off2[i]];
}
}
void
f3 (float * __restrict__ a, float const * __restrict__ b,
int const * __restrict__ off1, int const * __restrict__ off2, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
{
if (b[off1[i]] < b[off2[i]])
a[off1[i]] = b[off1[i]];
else
a[off2[i]] = b[off2[i]];
}
}
void
f4 (double * __restrict__ a, const double * __restrict__ b, int const *
__restrict__ off, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
a[i] = b[off[i]];
}
void
f5 (double * __restrict__ a, const double * __restrict__ b, long const *
__restrict__ off, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
a[i] = b[off[i]];
}
void
f6 (float * __restrict__ a, const float * __restrict__ b, int const *
__restrict__ off, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
a[i] = b[off[i]];
}
void
f7 (double * __restrict__ a, const double * __restrict__ b, int const *
__restrict__ off, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
a[off[i]] = b[i];
}
void
f8 (double * __restrict__ a, const double * __restrict__ b, long const *
__restrict__ off, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
a[off[i]] = b[i];
}
void
f9 (float * __restrict__ a, const float * __restrict__ b, int const *
__restrict__ off, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
a[off[i]] = b[i];
}
void
f10 (double * __restrict__ a, const double * __restrict__ b, int const *
__restrict__ off, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
if (a[i] > 10)
a[i] = b[off[i]];
}
void
f11 (double * __restrict__ a, const double * __restrict__ b, long const *
__restrict__ off, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
if (a[i] > 10)
a[i] = b[off[i]];
}
void
f12 (float * __restrict__ a, const float * __restrict__ b, int const *
__restrict__ off, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
if (a[i] > 10)
a[i] = b[off[i]];
}
void
f13 (double * __restrict__ a, const double * __restrict__ b, int const *
__restrict__ off, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
if (b[i] > 10)
a[off[i]] = b[i];
}
void
f14 (double * __restrict__ a, const double * __restrict__ b, long const *
__restrict__ off, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
if (b[i] > 10)
a[off[i]] = b[i];
}
void
f15 (float * __restrict__ a, const float * __restrict__ b, int const *
__restrict__ off, int n)
{
#pragma GCC ivdep
for (int i = 0; i < n; ++i)
if (b[i] > 10)
a[off[i]] = b[i];
}
With -O3 -mavx512{f,bw,dq,vl} -mtune=skylake-avx512
the f4/f5/f6 loops are vectorized for all of
-mprefer-vector-width={128,256,512}
(though e.g. for -mtune=generic not) and f7/f8/f9 are vectorized only with
-mprefer-vector-width=512 using vscatter*.
f10/f11/f12 are vectorized using vgather*, but strangely even in
-mprefer-vector-width=512 mode using the AVX2 gathers, so that suggests that
while unconditional scatters and gathers are properly supported, for
conditional ones
(both MASK_LOAD and MASK_STORE) the support for the cases when using a mask
register rather than a vector register with mask either hasn't been done or
doesn't work properly.
>From gcc-bugs-return-625668-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 17:41:31 2018
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Subject: [Bug fortran/88298] [7/8/9 Regression] Bogus conversion warning for CSHIFT with -fno-range-check -m64
Date: Wed, 12 Dec 2018 17:41:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Keywords| |diagnostic
Last reconfirmed| |2018-12-12
Ever confirmed|0 |1
Summary|Bogus conversion warning |[7/8/9 Regression] Bogus
|for CSHIFT with |conversion warning for
|-fno-range-check -m64 |CSHIFT with
| |-fno-range-check -m64
Target Milestone|--- |7.5
Known to fail| |8.2.0
Severity|normal |minor
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Likely caused by r224190 (no warning before r224160).
>From gcc-bugs-return-625669-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 17:44:12 2018
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Subject: [Bug rtl-optimization/88470] New: [9 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2354
Date: Wed, 12 Dec 2018 17:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88470
Bug ID: 88470
Summary: [9 Regression] ICE in maybe_record_trace_start, at
dwarf2cfi.c:2354
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-checking, ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-unknown-linux-gnu
gcc-9.0.0-alpha20181202 snapshot (r266729) ICEs when compiling
gcc/testsuite/gcc.target/i386/pr55686.c w/ -maccumulate-outgoing-args -O2
-ftrapv -fno-ivopts -fno-reorder-blocks-and-partition:
% x86_64-unknown-linux-gnu-gcc-9.0.0-alpha20181202 -maccumulate-outgoing-args
-O2 -ftrapv -fno-ivopts -fno-reorder-blocks-and-partition -c
gcc/testsuite/gcc.target/i386/pr55686.c
during RTL pass: dwarf2
gcc/testsuite/gcc.target/i386/pr55686.c: In function 'foo':
gcc/testsuite/gcc.target/i386/pr55686.c:16:1: internal compiler error: in
maybe_record_trace_start, at dwarf2cfi.c:2354
16 | }
| ^
0x5f3d89 maybe_record_trace_start
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/dwarf2cfi.c:2354
0x959746 scan_trace
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/dwarf2cfi.c:2547
0x959ce3 create_cfi_notes
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/dwarf2cfi.c:2700
0x959ce3 execute_dwarf2_frame
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/dwarf2cfi.c:3064
0x959ce3 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181202/work/gcc-9-20181202/gcc/dwarf2cfi.c:3552
>From gcc-bugs-return-625670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 17:49:12 2018
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Subject: [Bug target/87496] ICE in aggregate_value_p at gcc/function.c:2046
Date: Wed, 12 Dec 2018 17:49:00 -0000
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Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
--- Comment #13 from Peter Bergner <bergner at gcc dot gnu.org> ---
Now fixed along with an analogous fix to error out when using
-mabi={ibm,ieee}longdouble and -mlong-double-64 at the same time. Committed to
trunk and GCC8 and GCC7.
>From gcc-bugs-return-625671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 17:50:39 2018
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Subject: [Bug rtl-optimization/87096] "Optimised" snprintf is not POSIX conformant
Date: Wed, 12 Dec 2018 17:50:00 -0000
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
I find the POSIX requirement to fail when n is greater than INT_MAX to be in
conflict with C. I've submitted a defect to the Austin Group:
http://austingroupbugs.net/view.php?id=1219
At the same time, the POSIX requirement makes sense to me since it makes the
function safer. So I've also brought this up in WG14 to see if C would be
willing to adopt the POSIX requirement.
>From gcc-bugs-return-625672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 17:52:27 2018
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Subject: [Bug fortran/88467] Silently accepts wrong array constructor
Date: Wed, 12 Dec 2018 17:52:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-12
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 5.5 up to trunk (9.0). Compiling the test with 4.8 or 4.9 gives
errors
pr88467.f90:2.41:
print *, [integer :: 1, [integer(1) :: '3', 4]]
1
Error: Can't convert CHARACTER(1) to INTEGER(1) at (1)
pr88467.f90:3.41:
print *, [integer :: 1, [integer(2) :: '3', 4]]
1
Error: Can't convert CHARACTER(1) to INTEGER(2) at (1)
pr88467.f90:4.41:
print *, [integer :: 1, [integer(8) :: '3', 4]]
1
Error: Can't convert CHARACTER(1) to INTEGER(8) at (1)
pr88467.f90:5.42:
print *, [integer :: 1, [integer(16) :: '3', 4]]
1
Error: Can't convert CHARACTER(1) to INTEGER(16) at (1)
>From gcc-bugs-return-625673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 17:55:52 2018
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Subject: [Bug libfortran/87048] [9 Regression] array_constructor_8.f90 failure on armeb
Date: Wed, 12 Dec 2018 17:55:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-12-12
Ever confirmed|0 |1
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Any progress? It looks like a target issue.
>From gcc-bugs-return-625674-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 17:58:58 2018
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Subject: [Bug rtl-optimization/87096] "Optimised" snprintf is not POSIX conformant
Date: Wed, 12 Dec 2018 17:58:00 -0000
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--- Comment #6 from Rich Felker <bugdal at aerifal dot cx> ---
I don't see how the POSIX requirement makes the function safer. On the
contrary, it makes it less safe by introducing failure cases (that an
application might fail to check for, assuming it knows it has a good
implementation, with no spurious failures) for calls that should no fail. For
example:
char foo[3];
snprintf(buf, size, "%d", 42);
strcpy(foo, buf);
Assuming snprintf succeeds, the strcpy is safe. If snprintf spuriously fails,
buf contains whatever it previously held, possibly uninitialized data, and the
strcpy produces dangerous undefined behavior/overflows.
This is a stupid constructed example, but there are lots of cases where an
application might not check the result of snprintf because it's happy with
truncation and because the format string lacks anything that could fail (like
wchar_t conversions which can fail from EILSEQ), but where it would not be
happy/safe with uninitialized or stale data.
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Subject: [Bug fortran/88420] Fortran OpenACC "Clause SEQ conflicts with INDEPENDENT"
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-12-12
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Shouldn't this PR be closed as FIXED?
>From gcc-bugs-return-625676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 18:03:36 2018
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Subject: [Bug rtl-optimization/87096] "Optimised" snprintf is not POSIX conformant
Date: Wed, 12 Dec 2018 18:03:00 -0000
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--- Comment #7 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Wed, 12 Dec 2018, msebor at gcc dot gnu.org wrote:
> I find the POSIX requirement to fail when n is greater than INT_MAX to be in
> conflict with C. I've submitted a defect to the Austin Group:
> http://austingroupbugs.net/view.php?id=1219
Should note this is a resubmission of:
http://austingroupbugs.net/view.php?id=761
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Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Wed, 12 Dec 2018 18:05:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
We have:
else if (memory_access_type == VMAT_GATHER_SCATTER && gs_info.decl)
{
tree arglist = TYPE_ARG_TYPES (TREE_TYPE (gs_info.decl));
tree masktype
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (arglist))));
if (TREE_CODE (masktype) == INTEGER_TYPE)
{
if (dump_enabled_p ())
dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
"masked gather with integer mask not"
" supported.");
return false;
}
}
and no support for masked scatter stores when not using the aarch64 style ifns.
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Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Wed, 12 Dec 2018 18:10:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
See PR59617 for the masked gathers.
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Subject: [Bug fortran/84779] [7/8/9 Regression] Compiling gfortran.fortran-torture/execute/entry_4.f90 with -O1 or -Os and -fdefault-integer-8/9 gives an ICE
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Harald Anlauf <anlauf at gmx dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |anlauf at gmx dot de
--- Comment #2 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Dominique d'Humieres from comment #0)
> Compiling gfortran.fortran-torture/execute/entry_4.f90 with -O1 or -Os and
> -fdefault-integer-8 gives an ICE for gcc4.9 up to trunk (8.0)
>
> during RTL pass: expand
> /opt/gcc/p_work/gcc/testsuite/gfortran.fortran-torture/execute/entry_4.f90:
> 14:0:
>
> logical e2
>
> internal compiler error: in gen_lowpart_general, at rtlhooks.c:63
Reducing further gives a traceback:
complex function f2 (a)
implicit none
integer(8) a
! logical(4) e2 ! Compiles
logical(8) e2 ! ICE
entry e2 (a)
if (a .gt. 0) then
e2 = a .lt. 46
else
f2 = 45
endif
end function
during RTL pass: expand
pr84779.f90:5:0:
5 | logical(8) e2 ! ICE
|
internal compiler error: in gen_lowpart_general, at rtlhooks.c:63
0xc334a8 gen_lowpart_general(machine_mode, rtx_def*)
../../trunk/gcc/rtlhooks.c:63
0x90b604 extract_bit_field_1
../../trunk/gcc/expmed.c:1763
0x90c34c extract_bit_field(rtx_def*, poly_int<1u, unsigned long>, poly_int<1u,
unsigned long>, int, rtx_def*, machine_mode, machine_mode, bool, rtx_def**)
../../trunk/gcc/expmed.c:2097
0x928e5f expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../trunk/gcc/expr.c:11043
0x9283cb expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../trunk/gcc/expr.c:9858
0x7f2193 expand_expr
../../trunk/gcc/expr.h:279
0x7f2193 expand_return
../../trunk/gcc/cfgexpand.c:3588
0x7f2193 expand_gimple_stmt_1
../../trunk/gcc/cfgexpand.c:3691
0x7f2193 expand_gimple_stmt
../../trunk/gcc/cfgexpand.c:3818
0x7f47ff expand_gimple_basic_block
../../trunk/gcc/cfgexpand.c:5854
0x7fa8ee execute
../../trunk/gcc/cfgexpand.c:6476
Without -fdefault-integer-8 one gets:
pr84779.f90:5:15:
5 | logical(8) e2 ! ICE
| 1
Error: ENTRY result e2 can't be of type LOGICAL(8) in FUNCTION f2 at (1)
I think this is wrong and maybe points to where to look.
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Subject: [Bug libgomp/60035] [PATCH] make it possible to use OMP on both sides of a fork (without violating standard)
Date: Wed, 12 Dec 2018 18:21:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 9 has omp_pause_resource and omp_pause_resource_all APIs as required by
OpenMP 5.0 for this.
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Subject: [Bug d/88462] All D execution tests FAIL on Solaris/SPARC
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--- Comment #4 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Stepping through the backtrace, I see the following at Thread.initLocks
(core/thread.d around line 1719).
---
__gshared align(Mutex.alignof) void[__traits(classInstanceSize, Mutex)][2]
_locks;
static void initLocks()
{
foreach (ref lock; _locks)
{
lock[] = typeid(Mutex).initializer[];
(cast(Mutex)lock.ptr).__ctor();
}
}
---
So there are two things. Firstly, the object instance is type punned from a
void[N] array. Secondly it is aligned to pointer size, not the alignment of
the underlying record type.
So I'm certain that the problem will be fixed if `align(Mutex.alignof)` is
replaced with `align(8)`.
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Subject: [Bug fortran/84779] [7/8/9 Regression] Compiling gfortran.fortran-torture/execute/entry_4.f90 with -O1 or -Os and -fdefault-integer-8/9 gives an ICE
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The code in comment 2 compiles for me with -fdefault-integer-8 (I get the error
without it).
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Subject: [Bug fortran/88116] [8/9 Regression] ICE in gfc_convert_constant(): Unexpected type
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--- Comment #7 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Wed, Dec 12, 2018 at 04:59:21PM +0000, gscfq@t-online.de wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88116
>
> --- Comment #6 from G. Steinmetz <gscfq@t-online.de> ---
>
> (In reply to kargl from comment #5)
> > I don't know if you like to keep track of issues that you submit or not.
> Maybe I could do better. But for the next couple of weeks,
> I'm gonna take an absence from Bugzilla.
>
> > Do you want to migrate this to its own PR?
> This is now pr88467.
>
> Thanks.
>
I think I know what the problem is. Just don't know
how to fix it. Basically, gfortran is inserting
type conversions and doing the checking from the outer
array constructor inward. Thus, we have
[integer :: 1, [integer(8), 2, '3']]
Gfortran sees integer and integer(8) and inserts a
conversion via convert_i8_i4. When this is done, the
checking of the inner array constructor is lost. So,
we have something like
[integer :: 1, convert_i8_i4([2, '3'])
and the internal representation of gfc_expr contains
a union of the various types.
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Subject: [Bug fortran/88467] Silently accepts wrong array constructor
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #3 from kargl at gcc dot gnu.org ---
See pr88116 for a description of what appears to be happening.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Wed, 12 Dec 2018 19:13:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45220
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45220&action=edit
gcc9-pr88464.patch
Completely untested patch for the AVX512F conditional gather vectorization
support.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88465] AVX512: optimize loading of constant values to kN registers
Date: Wed, 12 Dec 2018 19:21:00 -0000
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--- Comment #3 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
This "null" ia an icc bug. Matt Godbolt from Compiler Explorer filed a bug with
Intel: ref 03997020
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Subject: [Bug target/87370] [7/8/9 Regression] Inefficient return code of struct values
Date: Wed, 12 Dec 2018 19:43:00 -0000
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--- Comment #12 from trashyankes at wp dot pl ---
(In reply to H.J. Lu from comment #11)
> (In reply to trashyankes from comment #10)
>
> Which GCC are you using? GCC 8.2 generates:
GCC Explorer :D
g++ (GCC-Explorer-Build) 9.0.0 20181211 (experimental)
https://gcc.godbolt.org/z/7AQXiq
Code is copy paste of test case.
Compiler is x86-64
Important are flags: `-O3 -march=skylake-avx512`
Without it compile this code fine.
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Subject: [Bug c++/88471] New: GCC suggests variables that are not of the right type
Date: Wed, 12 Dec 2018 19:46:00 -0000
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GCC suggests variables that are not of the right type. 'rename' is actually
function, so wouldn't be assigned to an int.
$ g++-8 -Wall -o name name.cpp
name.cpp: In function ‘int main()’:
name.cpp:6:13: error: ‘name’ was not declared in this scope
int v = name;
^~~~
name.cpp:6:13: note: suggested alternative: ‘rename’
int v = name;
^~~~
rename
$
// g++-8 -Wall -o name name.cpp
#include <cstdio>
int main()
{
int v = name;
return v;
}
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Subject: [Bug rtl-optimization/87096] "Optimised" snprintf is not POSIX conformant
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--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
The POSIX requirement prevents buffer overflow when the size of the destination
is incorrectly computed. I realize it's common practice to ignore snprintf
return value, but defensively written code should check it. The return value
can safely be ignored only when the function can neither fail nor truncate (in
the latter case sprintf is just as safe). Otherwise, the return value should
be tested and either the failure or the more likely truncation should be
handled somehow. The -Wstringop-truncation warning is based on this premise.
GCC can mitigate some of the buffer overflow cases when it can determine the
size of the destination on its own, but that's only possible in a subset of
cases.
That said, I'm not sure how to proceed here. I see three ways forward:
1) disable the folding in this case and call the library function
2) suspend this until C/POSIX have resolved the conflict
3) fold the call to -1 and set errno to EOVERFLOW
I have a trivial patch to do (1) but my testing shows that while Solaris 11
implements the POSIX requirement AIX and Glibc don't, so it won't solve the
conformance/portability problem. (2) is the easy way out for now, until C and
POSIX have either converged or decided not to. (3) is out of scope for GCC 9.
>From your comments, Rich, it's not clear to me what you are arguing for. It
sounds like you don't agree with the POSIX requirement but also disapprove of
the GCC optimization.
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Subject: [Bug other/88318] new test case gcc.dg/independent-cloneids-1.c fails on big endian
Date: Wed, 12 Dec 2018 19:46:00 -0000
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Wed Dec 12 19:45:45 2018
New Revision: 267063
URL: https://gcc.gnu.org/viewcvs?rev=267063&root=gcc&view=rev
Log:
Fix independent-cloneids-1.c testcase (PR88318)
The testcase uses REs like {(?n)\m_*bar[.$_]constprop[.$_]0:} to find
what functions are defined. But, this also matches lines like
.L.bar.constprop.0:
(which are used on powerpc64-linux).
The "(?n)" doesn't do anything here either. We should use "^" here
instead of just "\m".
PR testsuite/88318
* gcc.dg/independent-cloneids-1.c: Use ^ not \m.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/independent-cloneids-1.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87096] "Optimised" snprintf is not POSIX conformant
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--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to joseph@codesourcery.com from comment #7)
Thanks, that has some useful background.
>From gcc-bugs-return-625692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 19:54:27 2018
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Subject: [Bug testsuite/88318] new test case gcc.dg/independent-cloneids-1.c fails on big endian
Date: Wed, 12 Dec 2018 19:54:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-625693-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 19:57:59 2018
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Subject: [Bug fortran/84779] [7/8/9 Regression] Compiling gfortran.fortran-torture/execute/entry_4.f90 with -O1 or -Os and -fdefault-integer-8 gives an ICE
Date: Wed, 12 Dec 2018 19:57:00 -0000
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--- Comment #4 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Dominique d'Humieres from comment #3)
> The code in comment 2 compiles for me with -fdefault-integer-8 (I get the
> error without it).
Oh, now I see that the issue is -O1 and/or -Os,
whereas -O0, -Og, -O2, -O3 work.
I looked also at the dump-tree-optimized for e2 being logical(4)
or logical(8) and wondered why this can be so different.
>From gcc-bugs-return-625694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 19:58:10 2018
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Subject: [Bug rtl-optimization/87096] "Optimised" snprintf is not POSIX conformant
Date: Wed, 12 Dec 2018 19:58:00 -0000
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--- Comment #10 from Rich Felker <bugdal at aerifal dot cx> ---
Indeed, I think the POSIX requirement is both in conflict with the requirements
of the C language and a bad requirement in itself.
As for what GCC should do, since there room for debate about which behavior is
correct, and library implementations might even continue to disagree/diverge
from one or both of the standards for some time, I do not think GCC should be
overruling the choices made by the library implementation here. The folding for
this case should either happen only for constant size arguments <=INT_MAX, or
should produce a runtime check and force a function call for the case where
it's >INT_MAX.
>From gcc-bugs-return-625695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 20:01:03 2018
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Subject: [Bug libstdc++/80676] [DR 2995] basic_stringbuf does not use initial capacity of SSO string
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The C++2a draft now says:
"It is implementation-defined whether the sequence pointers (eback(), gptr(),
egptr(), pbase(), pptr(), epptr()) are initialized to null pointers."
>From gcc-bugs-return-625696-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 20:14:13 2018
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Subject: [Bug c++/86476] Members declared later in a class appear to be unavailable
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed, noexcept-specifier is a complete-class context. Simpler test:
struct S {
void g() noexcept(noexcept(i)) { }
int i;
};
>From gcc-bugs-return-625697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 20:14:28 2018
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Subject: [Bug c++/52869] [DR 1207] "this" not being allowed in noexcept clauses
Date: Wed, 12 Dec 2018 20:14:00 -0000
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--- Comment #14 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This is actually another problem, one that is tracked in PR86476.
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Patch posted at https://gcc.gnu.org/ml/gcc-patches/2018-12/msg00865.html .
>From gcc-bugs-return-625699-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 20:31:53 2018
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From: "skunk at iskunk dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/65725] Bootstrap errors on Solaris 10 x86-64, including object diffs
Date: Wed, 12 Dec 2018 20:31:00 -0000
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--- Comment #10 from Daniel Richard G. <skunk at iskunk dot org> ---
(In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #9)
>
> it would be helpful to know a bit more about that system: Solaris 10
> update release (e.g. from /etc/release), versions of as (as -V) and ld
> (ld -V), bootstrap compiler used, version of cmp (and do_compare setting
> in the toplevel Makefile).
Gladly:
$ cat /etc/release
Oracle Solaris 10 8/11 s10x_u10wos_17b X86
Copyright (c) 1983, 2011, Oracle and/or its affiliates. All rights reserved.
Assembled 23 August 2011
$ as -V
as: SunOS 5.10 119961-13 Patch 08/06/2014
[...]
$ ld -V
ld: Software Generation Utilities - Solaris Link Editors: 5.10-1.1505
I am bootstrapping with an earlier build of GCC 7.3.0 (itself compiled via a
non-bootstrapped build, due to this issue).
cmp(1) has no version option; it is simply /usr/bin/cmp:
$ cmp
usage: cmp [-l] [-s] file1 file2 [skip1] [skip2]
$ grep 'do-compare.*=' Makefile
do-compare = cmp $$f1 $$f2 16 16
do-compare3 = $(do-compare)
> To investigate comparison failures, it's usually necessary to have both
> a few of the object pairs failing the comparison and the corresponding
> .s files from -save-temps. You've to be very careful to rerun the exact
> compiler invocations from exactly the same directories which can be
> tricky due to all the shuffling around due to the different stages.
Is it feasible to re-run the bootstrap with something like
CFLAGS(_FOR_(BUILD|TARGET)) = "-save-temps" ? Recreating the compiler
invocations manually will be quite tricky.
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Subject: [Bug other/88472] New: attribute documentation poorly structured, lots of duplication
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88472
Bug ID: 88472
Summary: attribute documentation poorly structured, lots of
duplication
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Priority: P3
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As discussed in the thread below, the function/type/variable attribute
documentation in the manual isn't structured very well and contains quite a bit
of duplication. This makes it both harder to read and understand, and also
tedious to maintain and easy to get out of sync.
https://gcc.gnu.org/ml/gcc-patches/2018-12/msg00761.html
>From gcc-bugs-return-625701-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 21:04:27 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88473] New: AVX512: constant folding on mask does not remove unnecessary instructions
Date: Wed, 12 Dec 2018 21:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88473
Bug ID: 88473
Summary: AVX512: constant folding on mask does not remove
unnecessary instructions
Product: gcc
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[code]
#include <immintrin.h>
void test(void* data, void* data2)
{
__m128i v = _mm_load_si128((__m128i const*)data);
__mmask8 m = _mm_testn_epi16_mask(v, v);
m = _kor_mask8(m, 0x0f);
m = _kor_mask8(m, 0xf0);
v = _mm_maskz_add_epi16(m, v, v);
_mm_store_si128((__m128i*)data2, v);
}
[/code]
Code compiled using gcc 8.2 with -O3 -march=skylake-avx512 . gcc was able to
fold constant expressions and simplify masked vector add to non-masked one.
However original version of folded expression is still present in output:
[asm]
test(void*, void*):
vmovdqa64 xmm0, XMMWORD PTR [rdi]
mov eax, 15
vptestnmw k1, xmm0, xmm0
kmovb k2, eax
vpaddw xmm0, xmm0, xmm0
mov eax, -16
kmovb k3, eax
vmovaps XMMWORD PTR [rsi], xmm0
korb k0, k1, k2
korb k0, k0, k3
ret
[/asm]
clang properly cleaned it up:
[asm]
test(void*, void*): # @test(void*, void*)
vmovdqa xmm0, xmmword ptr [rdi]
vpaddw xmm0, xmm0, xmm0
vmovdqa xmmword ptr [rsi], xmm0
ret
[/asm]
>From gcc-bugs-return-625702-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 21:06:39 2018
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Subject: [Bug fortran/85544] [7/8/9 Regression] ICE in gfc_conv_scalarized_array_ref, at fortran/trans-array.c:3385
Date: Wed, 12 Dec 2018 21:06:00 -0000
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Harald Anlauf <anlauf at gmx dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |anlauf at gmx dot de
--- Comment #5 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Dominique d'Humieres from comment #2)
> The test in comment 0 compiles with -fno-frontend-optimize.
It might make sense to update $subject.
When gfc_conv_array_ref() is reached with -ffrontend-optimize being set,
its arguments are already bad.
>From gcc-bugs-return-625703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 21:08:25 2018
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Subject: [Bug fortran/88463] Rejects conforming source, OpenMP Parallel region Default(None) reference to module parameter array, separate source
Date: Wed, 12 Dec 2018 21:08:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45221
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45221&action=edit
gcc9-pr88463.patch
Untested fix.
>From gcc-bugs-return-625704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 21:22:24 2018
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Subject: [Bug c++/88471] GCC suggests variables that are not of the right type
Date: Wed, 12 Dec 2018 21:22:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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CC| |dmalcolm at gcc dot gnu.org
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
I agree that ideally GCC would only offer suggestions that can be meaningfully
applied. I'm pretty sure David is aware of this limitation based on past
discussions and may already be tracking this somewhere. CC'ing him.
>From gcc-bugs-return-625705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 21:29:09 2018
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Subject: [Bug fortran/85750] [7/8/9 Regression] Default initialization of derived type array missing
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Harald Anlauf <anlauf at gmx dot de> changed:
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--- Comment #3 from Harald Anlauf <anlauf at gmx dot de> ---
Looking at the dump-tree and comparing the original code with a
variant with the DT component ptr commented out, one wonders where
the initialization of the function result got lost in the original variant.
Without ptr (either pointer or allocatable), one gets the expected result.
>From gcc-bugs-return-625706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 21:32:18 2018
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Subject: [Bug fortran/85750] [7/8/9 Regression] Default initialization of derived type array missing
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--- Comment #4 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Stephan Kramer from comment #0)
Workaround:
> function make_list(i)
> integer, intent(in) :: i
> type(ilist), dimension(2) :: make_list
make_list = ilist()
> make_list(i)%count = 1
>
> end function make_list
>From gcc-bugs-return-625707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 21:39:40 2018
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Subject: [Bug target/88473] AVX512: constant folding on mask does not remove unnecessary instructions
Date: Wed, 12 Dec 2018 21:39:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Well, if you want this constant folded, why are you using the _k* intrinsics at
all rather than just normal arithmetics on the __mmask8 etc. types?
The intrinsics are handled in GCC in a way to force those to be actually those
instructions. We could surely implement those just by doing normal arithmetics
inside of the headers, but then it would be more likely that normal GPR
arithmetics would be used for those rather than mask logic etc. operations.
>From gcc-bugs-return-625708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 21:41:43 2018
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From: "jsm28 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88474] New: Inline built-in hypot for -ffast-math
Date: Wed, 12 Dec 2018 21:41:00 -0000
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Bug ID: 88474
Summary: Inline built-in hypot for -ffast-math
Product: gcc
Version: 9.0
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Target: i?86-*-*
GCC should support inline code generation for hypot functions, under
appropriate fast-math conditions.
glibc's bits/mathinline.h, for 32-bit non-SSE fast-math x86 only, has:
/* The argument range of the inline version of hypotl is slightly reduced. */
__inline_mathcodeNP2 (hypot, __x, __y,
return __libc_sqrtl (__x * __x + __y * __y))
We're moving away from such inlines in glibc, preferring to leave it to the
compiler to inline standard functions under appropriate conditions. Although
this is filed as a target issue, inlining hypot functions (given
-funsafe-math-optimizations, as it may change results, and -ffinite-math-only,
as it won't be correct for Inf, NaN arguments) is actually reasonably generic.
There are separate cases for when it's possible to do the * + sqrt operations
on a wider (hardware) type, so avoiding reducing the argument range, and when a
wider hardware type is unavailable or inappropriate to use, in which case the
argument range would be reduced by inlining (although that glibc inline still
does it for long double).
>From gcc-bugs-return-625709-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 22:02:48 2018
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From: "anlauf at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87764] gfortran crashes with illegal code
Date: Wed, 12 Dec 2018 22:02:00 -0000
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Harald Anlauf <anlauf at gmx dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |anlauf at gmx dot de
--- Comment #2 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Dominique d'Humieres from comment #1)
> Confirmed from 4.8 up to trunk (9.0). An instrumented compiler gives
>
> f951: Warning: No location in statement
> ../../work/gcc/fortran/trans.c:1768:39: runtime error: member access within
> null pointer of type 'struct gfc_linebuf'
> f951: internal compiler error: Segmentation fault: 11
The warning in comment#0 would be restored by the patch:
Index: gcc/fortran/trans.c
===================================================================
--- gcc/fortran/trans.c (revision 267065)
+++ gcc/fortran/trans.c (working copy)
@@ -1765,8 +1765,11 @@
void
gfc_set_backend_locus (locus * loc)
{
- gfc_current_backend_file = loc->lb->file;
- input_location = loc->lb->location;
+ if (loc->lb)
+ {
+ gfc_current_backend_file = loc->lb->file;
+ input_location = loc->lb->location;
+ }
}
However, this papers over the issue that the locus is not properly set.
>From gcc-bugs-return-625710-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 22:06:24 2018
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Subject: [Bug c++/52869] [DR 1207] "this" not being allowed in noexcept clauses
Date: Wed, 12 Dec 2018 22:06:00 -0000
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--- Comment #15 from denin at mail dot ru ---
(In reply to Marek Polacek from comment #14)
> This is actually another problem, one that is tracked in PR86476.
So context closure is unduly greedy: members defined above are available while
those from below are not? Funny indeed.
>From gcc-bugs-return-625711-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 22:10:21 2018
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Subject: [Bug c++/88475] New: -E -fdirectives-only clashes with raw strings
Date: Wed, 12 Dec 2018 22:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88475
Bug ID: 88475
Summary: -E -fdirectives-only clashes with raw strings
Product: gcc
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Source:
$ cat test.cpp
extern const char str[] = R"(
#define FOO 1
#NOSORT
)";
Compiles just fine:
$ g++ -c test.cpp; echo $?
0
Preprocessed output looks correct:
$ g++ -E test.cpp
# 1 "test.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1 "test.cpp"
extern const char str[] = R"(
#define FOO 1
#NOSORT
)";
But in the presence of -fdirectives-only (which icecream uses), it produces an
error and incorrectly preprocesses:
$ g++ -E -fdirectives-only test.cpp | tail -5
test.cpp:3:2: error: invalid preprocessing directive #NOSORT
#NOSORT
^~~~~~
# 1 "test.cpp"
extern const char str[] = R"(
#define FOO 1
)";
According to strace, cc1plus is the preprocessor, not /lib/cpp.
>From gcc-bugs-return-625712-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 22:31:25 2018
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Subject: [Bug rtl-optimization/88347] ICE in begin_move_insn, at sched-ebb.c:175
Date: Wed, 12 Dec 2018 22:31:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-12
CC| |segher at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed.
We here have an unconditional branch that is not followed by a barrier:
first there is a label and a jump table, after *that* is the barrier.
Is this correct RTL? If so,
===
diff --git a/gcc/sched-ebb.c b/gcc/sched-ebb.c
index 49ae286..566cb24 100644
--- a/gcc/sched-ebb.c
+++ b/gcc/sched-ebb.c
@@ -172,7 +172,11 @@ begin_move_insn (rtx_insn *insn, rtx_insn *last)
if (e)
gcc_checking_assert (NOTE_P (x) || LABEL_P (x));
else
- gcc_checking_assert (BARRIER_P (x));
+ {
+ if (LABEL_P (x) && JUMP_TABLE_DATA_P (NEXT_INSN (x)))
+ x = NEXT_INSN (NEXT_INSN (x));
+ gcc_checking_assert (BARRIER_P (x));
+ }
}
if (e)
===
fixes it.
>From gcc-bugs-return-625713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 22:41:31 2018
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From: "denin at mail dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/52869] [DR 1207] "this" not being allowed in noexcept clauses
Date: Wed, 12 Dec 2018 22:41:00 -0000
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--- Comment #16 from denin at mail dot ru ---
(In reply to Marek Polacek from comment #14)
> This is actually another problem, one that is tracked in PR86476.
Hmm.
$ cat wat.cpp
struct Omg {
void f() {}
void g() noexcept(noexcept(f())) {}
};
$ g++ wat.cpp
wat.cpp:3:31: error: cannot call member function ‘void Omg::f()’ without object
void g() noexcept(noexcept(f())) {}
^
$ g++ -v |& grep version
gcc version 8.2.1 20181127 (GCC)
>From gcc-bugs-return-625714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 22:47:55 2018
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From: "bugzilla@poradnik-webmastera.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/88476] New: Optimize expressions which uses vector, mask and general purpose registers
Date: Wed, 12 Dec 2018 22:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88476
Bug ID: 88476
Summary: Optimize expressions which uses vector, mask and
general purpose registers
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
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I was playing with Compiler Explorer to see how compilers can optimize various
pieces of code. I found next version of clang (version 8.0.0 (trunk 348905))
can optimize expressions which uses vector, mask and general purpose registers.
Such approach opens new optimization possibilities. Here are two example
functions which demonstrates this:
[code]
#include <immintrin.h>
void test1(void* data1, void* data2)
{
__m128i v1 = _mm_load_si128((__m128i const*)data1);
__m128i v2 = _mm_load_si128((__m128i const*)data2);
__mmask8 m1 = _mm_testn_epi16_mask(v1, v1);
__mmask8 m2 = _mm_testn_epi16_mask(v2, v2);
__mmask8 m = (m1 | 3) & (m2 | 3);
v1 = _mm_maskz_add_epi16(m, v1, v2);
_mm_store_si128((__m128i*)data2, v1);
}
void test2(void* data1, void* data2)
{
__m128i v1 = _mm_load_si128((__m128i const*)data1);
__m128i v2 = _mm_load_si128((__m128i const*)data2);
__mmask8 m1 = _mm_testn_epi16_mask(v1, v1);
__mmask8 m2 = _mm_testn_epi16_mask(v2, v2);
m1 = _kor_mask8(m1, 3);
m2 = _kor_mask8(m2, 3);
__mmask8 m = _kand_mask8(m1, m2);
v1 = _mm_maskz_add_epi16(m, v1, v2);
_mm_store_si128((__m128i*)data2, v1);
}
[/code]
When compiled using clang with -O3 -march=skylake-avx512, both are optimized to
the same code:
[asm]
test(void*, void*): # @test(void*, void*)
vmovdqa xmm0, xmmword ptr [rdi]
vmovdqa xmm1, xmmword ptr [rsi]
vpor xmm2, xmm1, xmm0
vptestnmw k0, xmm2, xmm2
mov al, 3
kmovd k1, eax
korb k1, k0, k1
vpaddw xmm0 {k1} {z}, xmm1, xmm0
vmovdqa xmmword ptr [rsi], xmm0
ret
[/asm]
gcc 9.0.0 20181211 (experimental) produces this:
[asm]
test1(void*, void*):
vmovdqa64 xmm1, XMMWORD PTR [rsi]
vmovdqa64 xmm0, XMMWORD PTR [rdi]
vptestnmw k1, xmm1, xmm1
vptestnmw k2{k1}, xmm0, xmm0
kmovb eax, k2
or eax, 3
kmovb k3, eax
vpaddw xmm0{k3}{z}, xmm0, xmm1
vmovaps XMMWORD PTR [rsi], xmm0
ret
test2(void*, void*):
vmovdqa64 xmm0, XMMWORD PTR [rdi]
vmovdqa64 xmm1, XMMWORD PTR [rsi]
vptestnmw k1, xmm0, xmm0
vptestnmw k3, xmm1, xmm1
mov eax, 3
kmovb k2, eax
korb k1, k1, k2
korb k0, k3, k2
kandb k1, k1, k0
vpaddw xmm0{k1}{z}, xmm0, xmm1
vmovaps XMMWORD PTR [rsi], xmm0
ret
[/asm]
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/52869] [DR 1207] "this" not being allowed in noexcept clauses
Date: Wed, 12 Dec 2018 22:49:00 -0000
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--- Comment #17 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to denin from comment #16)
> (In reply to Marek Polacek from comment #14)
> > This is actually another problem, one that is tracked in PR86476.
>
> Hmm.
>
> $ cat wat.cpp
> struct Omg {
> void f() {}
> void g() noexcept(noexcept(f())) {}
> };
> $ g++ wat.cpp
> wat.cpp:3:31: error: cannot call member function ‘void Omg::f()’ without
> object
> void g() noexcept(noexcept(f())) {}
> ^
> $ g++ -v |& grep version
> gcc version 8.2.1 20181127 (GCC)
This is what the commit in Comment 10 fixed; it has only been fixed for GCC 9.
>From gcc-bugs-return-625716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 22:50:12 2018
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Subject: [Bug fortran/88463] Rejects conforming source, OpenMP Parallel region Default(None) reference to module parameter array, separate source
Date: Wed, 12 Dec 2018 22:50:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Dec 12 22:49:35 2018
New Revision: 267069
URL: https://gcc.gnu.org/viewcvs?rev=267069&root=gcc&view=rev
Log:
PR fortran/88463
* trans-openmp.c (gfc_omp_predetermined_sharing): Handle TREE_READONLY
VAR_DECLs with DECL_EXTERNAL like those with TREE_STATIC.
* testsuite/libgomp.fortran/pr88463-1.f90: New test.
* testsuite/libgomp.fortran/pr88463-2.f90: New test.
Added:
trunk/libgomp/testsuite/libgomp.fortran/pr88463-1.f90
trunk/libgomp/testsuite/libgomp.fortran/pr88463-2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-openmp.c
trunk/libgomp/ChangeLog
>From gcc-bugs-return-625717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 22:51:21 2018
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Subject: [Bug target/88213] ICE in change_address_1, at emit-rtl.c:2286
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc-*-linux-gnu |powerpc*-*-*
CC| |segher at gcc dot gnu.org
--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This builds fine for me.
>From gcc-bugs-return-625718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 22:52:40 2018
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From: "patrick at motec dot com.au" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/88456] __atomic_compare_exchange implementation inconsistently used
Date: Wed, 12 Dec 2018 22:52:00 -0000
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--- Comment #3 from Patrick Oppenlander <patrick at motec dot com.au> ---
(In reply to joseph@codesourcery.com from comment #2)
> If the call is one GCC can't expand on its own (atomic operations on large
> objects needing locks, architecture lacks required atomic operation
> instructions, etc.), it would be reasonable for GCC to inline a definition
> to which it would otherwise generate an out-of-line call.
What you describe is the current behaviour when using LTO. gcc happily inlines
the implementations of atomic library functions for which it can't expand
builtins.
For context, I came across this problem while implementing atomic support on
ARM Cortex-M0. Cortex-M0 doesn't support load/store-exclusive so a full suite
of functions must be provided.
I then built the same project targeting Cortex-M4 for which the Cortex-M0
implementations are not optimal, but should still work. However, the resultant
binary used gcc provided builtins in some places and my Cortex-M0
implementations in others.
I think it needs to be consistently one way or the other, or fail to build in
this situation.
Personally, I like the concept of being able to provide external
implementations, especially when considering bare-metal embedded programming.
>From gcc-bugs-return-625719-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 22:56:55 2018
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Subject: [Bug target/88473] AVX512: constant folding on mask does not remove unnecessary instructions
Date: Wed, 12 Dec 2018 22:56:00 -0000
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--- Comment #2 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
I was playing with Compiler Explorer, to see how compilers optimize various
pieces of code. I found that next clang version (currently trunk) will be able
to analyze expressions which spans over vectors, masks and GPRs. I logged Bug
88476 to do something similar in gcc, please take a look. I think such approach
as in clang would be more beneficial.
In the past I also thought about template-based library, which would wrap
vector operations. One of unique concepts was to create separate types to hold
vector with bool values, and another one for int masks. With lazy instantiation
this should lead to faster resulting code. I did not try to write it yet, but
overall this approach look promising for me. With it such cases as in this bug
can
appear as a side effect of inlining.
>From gcc-bugs-return-625720-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 22:59:05 2018
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From: "anders.granlund.0 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88477] New: Variable with type completed in initializer not allowed.
Date: Wed, 12 Dec 2018 22:59:00 -0000
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Bug ID: 88477
Summary: Variable with type completed in initializer not
allowed.
Product: gcc
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Consider the following program (prog.c):
int main()
{
struct S s = (struct S { int x; }) { .x = 1 };
}
The type of s is completed in the initializer, so this should be legit.
I get an unexpected error however when compiling with the following command
line:
gcc prog.c -std=c11 -pedantic-errors
Note that clang compiles this program without any errors.
Link to online compiler:
https://wandbox.org/permlink/WyMDk6tDyTwORPVp
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Subject: [Bug fortran/88467] Silently accepts wrong array constructor
Date: Wed, 12 Dec 2018 23:15:00 -0000
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--- Comment #4 from kargl at gcc dot gnu.org ---
(In reply to kargl from comment #3)
> See pr88116 for a description of what appears to be happening.
So, in array.c (gfc_match_array_constructor), we have this
bit of code
/* Walk the constructor and ensure type conversion for numeric types. */
if (gfc_numeric_ts (&ts))
{
c = gfc_constructor_first (head);
for (; c; c = gfc_constructor_next (c))
gfc_convert_type (c->expr, &ts, 1);
}
For a failing example of "[integer :: 1, [integer(8) :: '3', 4]]",
ts is integer. The first constructor element is 1 and it has
an EXPR_CONSTANT type and integer type. The next constructor has
EXPR_ARRAY and the type for the array is integer(8). A conversion
is applied to array. What I haven't determined yet is why
gfc_match_array_constructor is called recursively or does reach
the walk.
>From gcc-bugs-return-625722-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 23:31:01 2018
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Subject: [Bug tree-optimization/87096] "Optimised" snprintf is not POSIX conformant
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
Component|rtl-optimization |tree-optimization
--- Comment #11 from Martin Sebor <msebor at gcc dot gnu.org> ---
GCC 9 patch: https://gcc.gnu.org/ml/gcc-patches/2018-12/msg00886.html
>From gcc-bugs-return-625723-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Dec 12 23:46:25 2018
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Subject: [Bug target/88469] Unaligned stack access on arm (in particular armv5)
Date: Wed, 12 Dec 2018 23:46:00 -0000
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--- Comment #2 from Stefan Ring <stefanrin at gmail dot com> ---
Created attachment 45222
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45222&action=edit
Preprocessed sample
g++ -c -O2 -x c++ prep
produces the shown code.
$ g++ -v
Using built-in specs.
COLLECT_GCC=/home/sr/gcc8/bin/g++
COLLECT_LTO_WRAPPER=/home/sr/gcc8/libexec/gcc/armv5tel-unknown-linux-gnueabi/8.2.0/lto-wrapper
Target: armv5tel-unknown-linux-gnueabi
Configured with: ../gcc-8.2.0/configure --build=armv5tel-unknown-linux-gnueabi
--prefix=/home/sr/gcc8 --enable-languages=c,c++ --with-arch=armv5te
--with-mode=arm --disable-nls
Thread model: posix
gcc version 8.2.0 (GCC)
>From gcc-bugs-return-625724-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 00:12:29 2018
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From: "xerofoify at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88395] ICE: Segmentation fault signal terminated program cc1plus, with -std=c++2a -fconcepts
Date: Thu, 13 Dec 2018 00:12:00 -0000
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nik <xerofoify at gmail dot com> changed:
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--- Comment #1 from nik <xerofoify at gmail dot com> ---
(In reply to Emmanuel Le Trong from comment #0)
> Both trunk and 8.2.1 segfault on this valid snippet
>
> $ cat bug_4.cpp
> template <class T, class U>
> concept bool Concept2 = requires (T t, U u)
> {
> { t += u } -> T&;
> };
>
> template <class T>
> concept bool Concept = Concept2 <T, T>;
>
> struct S
> {
> template <Concept T>
> constexpr S& operator += (T o);
> };
> constexpr S operator * (S a, S b)
> {
> return a += b;
> }
>
>
>
> $ g++-9 -std=c++2a -fconcepts -c bug_4.cpp
> g++-9: internal compiler error: Segmentation fault signal terminated program
> cc1plus
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <https://gcc.gnu.org/bugs/> for instructions.
>
> $ g++-9 -v
> Using built-in specs.
> COLLECT_GCC=g++-9
> COLLECT_LTO_WRAPPER=/home/manu/system/opt/gcc-9/libexec/gcc/x86_64-pc-linux-
> gnu/9.0.0/lto-wrapper
> Target: x86_64-pc-linux-gnu
> Configured with: ../gcc-9/configure --prefix=/home/manu/system/opt/gcc-9
> --program-suffix=-9
> Thread model: posix
> gcc version 9.0.0 20181204 (experimental) (GCC)
First off that's just a valid snippet without a class definition so I was
unable to build it against gcc itself to even check this is a bug. Further more
can you check this is still happening and if so just report back with the exact
code that builds but is giving you a segfault on the trunk branch.
>From gcc-bugs-return-625725-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 00:50:59 2018
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88477] Variable with type completed in initializer not allowed.
Date: Thu, 13 Dec 2018 00:50:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I'd argue that the constraint "The type of the entity to be initialized
shall be an array of unknown size or a complete object type that is not a
variable length array type." must be understood to refer to the type
before the initializer (because the case of an array of unknown size only
applies before the initializer, not after it).
>From gcc-bugs-return-625726-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 03:08:14 2018
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/44313] g++ no longer warns about private copy constructors
Date: Thu, 13 Dec 2018 03:08:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Ian Lance Taylor from comment #0)
> Our very own web page has a C++ FAQ about requires that a copy constructor
> be visible when initializing a const reference:
> http://gcc.gnu.org/bugs/#cxx_rvalbind
>
> However, current versions of gcc do not give an error for that code, even
> when using -pedantic -std=c++98. The last version of gcc to give the error
> was gcc 4.2. This seems ironic considering that we say "most popular
> compilers do not correctly implement this rule."
>
> I think we should give that error when -pedantic.
Confirmed that there is still no error:
$ cat 44313.cc
class A
{
public:
A();
private:
A(const A&); // private copy ctor
};
A makeA(void);
void foo(const A&);
void bar(void)
{
foo(A()); // error, copy ctor is not accessible
foo(makeA()); // error, copy ctor is not accessible
A a1;
foo(a1); // OK, a1 is a lvalue
}
$ /usr/local/bin/gcc -c -Wall -Wextra -pedantic -Weffc++ -std=c++98 44313.cc
$
(silence)
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Subject: [Bug c++/38658] trivial try/catch statement not eliminated
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krux <hoganmeier at gmail dot com> changed:
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--- Comment #5 from krux <hoganmeier at gmail dot com> ---
https://godbolt.org/z/rnDy8l
>From gcc-bugs-return-625728-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 07:12:23 2018
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From: "sbence92 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/88450] ICE in stage 2 compiler while configuring libgcc
Date: Thu, 13 Dec 2018 07:12:00 -0000
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--- Comment #2 from Bence Szabó <sbence92 at gmail dot com> ---
Bisected, problem starts at r266345 ([PATCH][PR84877]Dynamically align the
address for local parameter copy on the stack when required alignment is larger
than MAX_SUPPORTED_STACK_ALIGNMEN).
>From gcc-bugs-return-625729-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 07:58:41 2018
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From: "anders.granlund.0 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88477] Variable with type completed in initializer not allowed.
Date: Thu, 13 Dec 2018 07:58:00 -0000
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--- Comment #2 from Anders Granlund <anders.granlund.0 at gmail dot com> ---
To what part of the standard are you refering to?
This is what I found and it allows the given program:
C11 standard 6.7.7: https://port70.net/~nsz/c/c11/n1570.html#6.7p7
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Subject: [Bug target/88461] AVX512: gcc should keep value in kN registers if possible
Date: Thu, 13 Dec 2018 07:59:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Dec 13 07:58:42 2018
New Revision: 267076
URL: https://gcc.gnu.org/viewcvs?rev=267076&root=gcc&view=rev
Log:
PR target/88461
* config/i386/i386.md (*zero_extendsidi2, zero_extend<mode>di2,
*zero_extend<mode>si2, *zero_extendqihi2): Add =*k, *km alternatives.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88461] AVX512: gcc should keep value in kN registers if possible
Date: Thu, 13 Dec 2018 08:01:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Dec 13 08:00:42 2018
New Revision: 267077
URL: https://gcc.gnu.org/viewcvs?rev=267077&root=gcc&view=rev
Log:
PR target/88461
* config/i386/sse.md (VI1248_AVX512VLBW, AVX512ZEXTMASK): New
mode iterators.
(<avx512>_testm<mode>3<mask_scalar_merge_name>,
<avx512>_testnm<mode>3<mask_scalar_merge_name>): Merge patterns
with VI12_AVX512VL and VI48_AVX512VL iterators into ones with
VI1248_AVX512VLBW iterator.
(*<avx512>_testm<VI1248_AVX512VLBW:mode>3_zext,
*<avx512>_testm<VI1248_AVX512VLBW:mode>3_zext_mask,
*<avx512>_testnm<VI1248_AVX512VLBW:mode>3_zext,
*<avx512>_testnm<VI1248_AVX512VLBW:mode>3_zext_mask): New
define_insns.
* gcc.target/i386/pr88461.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr88461.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/88465] AVX512: optimize loading of constant values to kN registers
Date: Thu, 13 Dec 2018 08:08:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Dec 13 08:08:22 2018
New Revision: 267078
URL: https://gcc.gnu.org/viewcvs?rev=267078&root=gcc&view=rev
Log:
PR target/88465
* config/i386/i386.md (*movdi_internal, *movsi_internal,
*movhi_internal, *movqi_internal): Add alternative(s) to load
0 or -1 into k registers using kxor or kxnoq instructions.
* gcc.target/i386/avx512f-pr88465.c: New test.
* gcc.target/i386/avx512dq-pr88465.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512dq-pr88465.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88465.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/88461] AVX512: gcc should keep value in kN registers if possible
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for GCC 9 and later.
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Subject: [Bug target/88465] AVX512: optimize loading of constant values to kN registers
Date: Thu, 13 Dec 2018 08:10:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for GCC 9 and later.
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Subject: [Bug rtl-optimization/88470] [7/8/9 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2354
Date: Thu, 13 Dec 2018 08:32:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-13
CC| |jakub at gcc dot gnu.org,
| |segher at gcc dot gnu.org
Target Milestone|--- |7.5
Summary|[9 Regression] ICE in |[7/8/9 Regression] ICE in
|maybe_record_trace_start, |maybe_record_trace_start,
|at dwarf2cfi.c:2354 |at dwarf2cfi.c:2354
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r227775.
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Subject: [Bug rtl-optimization/88470] [7/8/9 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2354
Date: Thu, 13 Dec 2018 09:07:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, we have in *.csa still correct:
(note 6 1 4 2 [bb 2] NOTE_INSN_BASIC_BLOCK)
(note 4 6 11 2 NOTE_INSN_FUNCTION_BEG)
(insn 11 4 12 2 (set (reg:CCNO 17 flags)
(compare:CCNO (reg:DI 5 di [orig:91 x ] [91])
(const_int 0 [0]))) "pr88470.c":9:3 8 {*cmpdi_ccno_1}
(nil))
(jump_insn 12 11 33 2 (set (pc)
(if_then_else (le (reg:CCNO 17 flags)
(const_int 0 [0]))
(label_ref:DI 62)
(pc))) "pr88470.c":9:3 657 {*jcc}
(expr_list:REG_DEAD (reg:CCNO 17 flags)
(int_list:REG_BR_PROB 7 (nil)))
-> 62)
...
// prologue that changes CFA, sp etc.
...
(note 27 25 28 6 [bb 6] NOTE_INSN_BASIC_BLOCK)
(note 28 27 29 6 NOTE_INSN_DELETED)
(jump_insn 29 28 30 6 (set (pc)
(mem/f:DI (reg:DI 5 di [97]) [2 *c.2_4+0 S8 A64])) "pr88470.c":15:3 660
{*indirect_jump}
(expr_list:REG_DEAD (reg:DI 5 di [97])
(nil)))
;; succ:
;; lr out 7 [sp]
;; live out 7 [sp]
(barrier 30 29 41)
(note 41 30 62 NOTE_INSN_DELETED)
;; basic block 7, loop depth 0, count 0 (precise), probably never executed
;; prev block 6, next block 1, flags: (REACHABLE, RTL)
;; pred: 2 [never] count:0 (precise)
;; bb 7 artificial_defs: { }
;; bb 7 artificial_uses: { u-1(7){ }}
;; lr in 5 [di] 7 [sp]
;; lr use 5 [di] 7 [sp]
;; lr def
;; live in 5 [di] 7 [sp]
;; live gen
;; live kill
(code_label 62 41 59 7 6 (nil) [1 uses])
(note 59 62 58 7 [bb 7] NOTE_INSN_BASIC_BLOCK)
(jump_insn 58 59 61 7 (set (pc)
(mem/f:DI (reg:DI 5 di [97]) [2 *c.2_4+0 S8 A64])) "pr88470.c":15:3 660
{*indirect_jump}
(expr_list:REG_DEAD (reg:DI 5 di [97])
(nil)))
where bb6 is reachable from within the body of the function where the
post-prologue CFI state is in effect,
and bb7 which is reachable from the start of the function before the prologue,
where a different CFI state is in effect.
During jump2 pass we decide to crossjump this and turn it into invalid IL.
Now, it is completely unclear what should have prevented this, if the
crossjumping needs to compute the CFI state to figure this out it would be bad.
The problem here is that because of the UB in the testcase those basic blocks
have no successors.
In outgoing_edges_match we have:
/* If we performed shrink-wrapping, edges to the exit block can
only be distinguished for JUMP_INSNs. The two paths may differ in
whether they went through the prologue. Sibcalls are fine, we know
that we either didn't need or inserted an epilogue before them. */
if (crtl->shrink_wrapped
&& single_succ_p (bb1)
&& single_succ (bb1) == EXIT_BLOCK_PTR_FOR_FN (cfun)
&& !JUMP_P (BB_END (bb1))
&& !(CALL_P (BB_END (bb1)) && SIBLING_CALL_P (BB_END (bb1))))
return false;
That has been introduced in r179553, more details in
https://gcc.gnu.org/ml/gcc-patches/2011-09/msg00775.html
Maybe we need to do something similar for this case (crtl->shrink_wrapped &&
EDGE_COUNT (bb1->succs) == 0 && JUMP_P (BB_END (bb1))?
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Subject: [Bug rtl-optimization/88470] [7/8/9 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2354
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45223
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45223&action=edit
gcc9-pr88470.patch
Actually, this indirect jump has a successor - EXIT. So perhaps this instead?
I can gather some statistics on how often such a change would make a
difference.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> What is void Main(void) ? Is this using mingw or something?
>
> Please provide the missing information as requested by
> https://gcc.gnu.org/bugs
The requested information was not provided, and this works fine for me on
mingw-w64 using
gcc version 7.3.0 20180125 (Fedora MinGW 7.3.0-1.fc28) (GCC)
and
gcc version 9.0.0 20181212 (experimental) (GCC)
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/88041] gdc.test tests should include that prefix in test names
Date: Thu, 13 Dec 2018 09:40:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2018-12/msg00903.ht
| |ml
Last reconfirmed| |2018-12-13
Assignee|unassigned at gcc dot gnu.org |ro at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #2 from Rainer Orth <ro at gcc dot gnu.org> ---
Mine, patch posted.
>From gcc-bugs-return-625740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 09:41:09 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/44313] g++ no longer warns about private copy constructors
Date: Thu, 13 Dec 2018 09:41:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Ian Lance Taylor from comment #1)
> This was addressed as a DR by the C++ committee:
> http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#391 . And of
> course the proposed C++0x standard removes this error. So gcc should only
> give an error with -std=c++98 -pedantic. This is low priority.
Our policy is to implement defect report resolutions in all dialects they apply
to. We don't implement a buggy standard even if you say -std=c++98 -pedantic.
So not a bug.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/88454] [9 regression] test case gcc.dg/tree-ssa/split-path-5.c fails after r266971
Date: Thu, 13 Dec 2018 09:57:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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>From gcc-bugs-return-625742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 10:01:07 2018
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Subject: [Bug c++/88478] New: valgrind error in cselib_record_sets
Date: Thu, 13 Dec 2018 10:00:00 -0000
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Bug ID: 88478
Summary: valgrind error in cselib_record_sets
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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For this C++ code:
struct a {
bool b;
int second;
template < typename c, typename d > a(c, d) {}
};
enum f {}g;
a h() { return a(false, g); }
compiled by a valgrind version of recent gcc trunk and compiler
flag -O2, does this:
$ ~/gcc/results/bin/gcc -c -O2 bug490.cc
==9146== Conditional jump or move depends on uninitialised value(s)
==9146== at 0x823414: cselib_record_sets(rtx_insn*) (cselib.c:2619)
==9146== by 0x82581F: cselib_process_insn(rtx_insn*) (cselib.c:2791)
==9146== by 0x12903FF: dse_step1 (dse.c:2660)
==9146== by 0x12903FF: rest_of_handle_dse (dse.c:3576)
$ ~/gcc/results/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/home/dcb/gcc/results/bin/gcc
COLLECT_LTO_WRAPPER=/home/dcb/gcc/results.267000.valgrind/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../trunk/configure
--prefix=/home/dcb/gcc/results.267000.valgrind --disable-bootstrap
--disable-multilib --disable-werror --enable-checking=valgrind
--enable-languages=c,c++,fortran
Thread model: posix
gcc version 9.0.0 20181211 (experimental) (GCC)
$
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Subject: [Bug fortran/88420] Fortran OpenACC "Clause SEQ conflicts with INDEPENDENT"
Date: Thu, 13 Dec 2018 10:07:00 -0000
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|WAITING |ASSIGNED
--- Comment #3 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #2)
> Shouldn't this PR be closed as FIXED?
No, this will need to be fixed in other release branches, too.
>From gcc-bugs-return-625744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 10:31:19 2018
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From: "emmanuel.le-trong@cnrs-orleans.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88395] ICE: Segmentation fault signal terminated program cc1plus, with -std=c++2a -fconcepts
Date: Thu, 13 Dec 2018 10:31:00 -0000
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--- Comment #2 from Emmanuel Le Trong <emmanuel.le-trong@cnrs-orleans.fr> ---
(In reply to Nicholas Krause from comment #1)
> First off that's just a valid snippet without a class definition so I was
> unable to build it against gcc itself to even check this is a bug. Further
> more can you check this is still happening and if so just report back with
> the exact code that builds but is giving you a segfault on the trunk branch.
I'm sorry I don't understand your requests. The compilation of this small piece
of code causes the compiler (trunk 20181213) to crash, without further
information.
>From gcc-bugs-return-625745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 10:33:20 2018
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From: "vincent-gcc at vinc17 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/88479] New: sanitizer should provide an option to detect conversion to signed integer that overflows
Date: Thu, 13 Dec 2018 10:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88479
Bug ID: 88479
Summary: sanitizer should provide an option to detect
conversion to signed integer that overflows
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: vincent-gcc at vinc17 dot net
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
The sanitizer should provide an option to detect the case where a conversion of
an integer to a signed integer overflows, whose behavior is
implementation-defined (thus not caught by -fsanitize=undefined) according to
ISO C 6.3.1.3p3.
More than for being an implementation-defined behavior, the reason is that such
an overflow may actually be a bug in the program (unnoticed yet, and/or
possibly noticeable only on some other platforms where the type sizes would be
different). Such an option would ease bug detection and debugging.
Once implemented, the -fsanitize=signed-integer-overflow description in the GCC
manual should be updated to mention this new option. It currently says:
Note, integer promotion rules must be taken into account. That is,
the following is not an overflow:
signed char a = SCHAR_MAX;
a++;
as this just yields an overflow when the int SCHAR_MAX+1 is converted back to
signed char (thus this would be detected by this new feature).
Note: the addition of a conversion sanitizer has been suggested here:
https://gcc.gnu.org/ml/gcc-help/2018-11/msg00078.html
>From gcc-bugs-return-625746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 10:36:02 2018
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From: "xerofoify at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88395] ICE: Segmentation fault signal terminated program cc1plus, with -std=c++2a -fconcepts
Date: Thu, 13 Dec 2018 10:36:00 -0000
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--- Comment #3 from Nicholas Krause <xerofoify at gmail dot com> ---
(In reply to Emmanuel Le Trong from comment #2)
> (In reply to Nicholas Krause from comment #1)
> > First off that's just a valid snippet without a class definition so I was
> > unable to build it against gcc itself to even check this is a bug. Further
> > more can you check this is still happening and if so just report back with
> > the exact code that builds but is giving you a segfault on the trunk branch.
>
> I'm sorry I don't understand your requests. The compilation of this small
> piece of code causes the compiler (trunk 20181213) to crash, without further
> information.
test.cpp:2:5: error: ‘concept’ does not name a type; did you mean ‘constexpr’?
concept bool Concept2 = requires (T t, U u)
^~~~~~~
constexpr
test.cpp:2:5: note: ‘concept’ only available with -fconcepts
test.cpp:8:5: error: ‘concept’ does not name a type; did you mean ‘constexpr’?
concept bool Concept = Concept2 <T, T>;
^~~~~~~
constexpr
test.cpp:8:5: note: ‘concept’ only available with -fconcepts
test.cpp:12:19: error: ‘Concept’ has not been declared
template <Concept T>
^~~~~~~
test.cpp:13:35: error: ‘T’ was not declared in this scope
constexpr S& operator += (T o);
^
test.cpp:13:38: error: declaration of ‘operator+=’ as non-function
constexpr S& operator += (T o);
^
test.cpp: In function ‘constexpr S operator*(S, S)’:
test.cpp:17:18: error: no match for ‘operator+=’ (operand types are ‘S’ and
‘S’)
return a += b;
Is what I am getting because I don't have the class definition. I would like
all of the code so that it builds properly and can check against a compiling
working program.
>From gcc-bugs-return-625747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 10:49:30 2018
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From: "tnfchris at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/88480] New: libiberty's use of VLAs causing stack overflow
Date: Thu, 13 Dec 2018 10:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88480
Bug ID: 88480
Summary: libiberty's use of VLAs causing stack overflow
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
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Originally reported as a binutils bug:
https://sourceware.org/bugzilla/show_bug.cgi?id=23906
libiberty uses two VLAs when demangling symbols
https://github.com/gcc-mirror/gcc/blob/master/libiberty/cp-demangle.c#L4315
These VLAs when linking large C++ code bases with lots of templates cause a
stack exhaustion.
These should probably just be normal heap allocations so they scale properly.
>From gcc-bugs-return-625748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 10:58:45 2018
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Subject: [Bug rtl-optimization/88470] [7/8/9 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2354
Date: Thu, 13 Dec 2018 10:58:00 -0000
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
So the edge is a fake edge? Can you test for that instead, like the code
in cfgcleanup.c immediately following this already does?
>From gcc-bugs-return-625749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 11:02:48 2018
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Subject: [Bug target/88474] Inline built-in hypot for -ffast-math
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-12-13
Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com
Ever confirmed|0 |1
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 45224
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45224&action=edit
Proposed patch
Patch that implements hypotf and hypot using x87 XFmode arithmetic.
>From gcc-bugs-return-625750-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 11:03:07 2018
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Subject: [Bug rtl-optimization/88470] [7/8/9 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2354
Date: Thu, 13 Dec 2018 11:03:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I've changed that to
+ && (!JUMP_P (BB_END (bb1))
+ /* Punt if the only successor is a fake edge to exit, the jump
+ must be some weird one. */
+ || (single_succ_edge (bb1)->flags & EDGE_FAKE) != 0)
shortly after attaching the patch.
>From gcc-bugs-return-625751-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 11:18:03 2018
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Subject: [Bug bootstrap/88450] [9 regression] ICE in stage 2 compiler while configuring libgcc
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-13
CC| |ebotcazou at gcc dot gnu.org
Host|x86_64-w64-mingw32 |
Target Milestone|--- |9.0
Summary|ICE in stage 2 compiler |[9 regression] ICE in stage
|while configuring libgcc |2 compiler while
| |configuring libgcc
Ever confirmed|0 |1
Severity|normal |critical
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Egad.
>From gcc-bugs-return-625752-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 11:19:43 2018
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Subject: [Bug c/88481] New: -O1 causes optimizer to drop 'then' clause in conditional
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Bug ID: 88481
Summary: -O1 causes optimizer to drop 'then' clause in
conditional
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Compiling with option -O1 causes the optimizer to drop code for the 'then'
branch.
Verified for targets
gnueabi-linux (host=x86/linux, target=arm/linux), and
x86 (native)
Compilation produces correct results with options -O0, -O2, -O3, -Os.
If -O1 options
-fdefer-pop
-fdelayed-branch
-fguess-branch-probability
-fcprop-registers
-floop-optimize
-fif-conversion
-fif-conversion2
-ftree-ccp
-ftree-dce
-ftree-dominator-opts
-ftree-dse
-ftree-ter
-ftree-lrs
-ftree-sra
-ftree-copyrename
-ftree-fre
-ftree-ch
-funit-at-a-time
-fmerge-constants
are used, the result is correct. However, adding -O1 to this list of options
results in the missing code.
-------------------------------------------------------------------------
the exact version of GCC:
gcc --version
gcc (SUSE Linux) 8.2.1 20181108 [gcc-8-branch revision 265914]
the options given when GCC was configured/built:
unknown
the complete command line that triggers the bug:
gcc -D_GNU_SOURCE=1 -D_POSIX_SOURCE=1 -DDEBUG=1 -DWITH_MBEDTLS=1 -DTARGET=PC
-I.././inc -I../modelSource -I../../libiec61850/config
-I../../libiec61850/src/logging -I../../libiec61850/src/hal/inc
-I../../libiec61850/src/common/inc -I../../libiec61850/src/mms/inc
-I../../libiec61850/src/iec61850/inc
-I../../libiec61850/src/iec61850/inc_private
-I../../libiec61850/src/mms/inc_private -I../../libiec61850/third_party/sqlite
-I../../libiec61850/third_party/mbedtls/include -I../../libiec61850/src/tls
-I../../libiec61850/src/tls/mbedtls -I../../libiec61850/src/mms/iso_mms/asn1c
-O1 -fno-strict-aliasing -fwrapv -fno-aggressive-loop-optimizations -g -Wall -c
-fmessage-length=0 -MMD -MP -MF"src/runtime/actPow_ggioRt.d"
-MT"src/runtime/actPow_ggioRt.o" -o "src/runtime/actPow_ggioRt.o"
"../src/runtime/actPow_ggioRt.c"
the compiler output (error messages, warnings, etc.):
gcc -D_GNU_SOURCE=1 -D_POSIX_SOURCE=1 -DDEBUG=1 -DWITH_MBEDTLS=1 -DTARGET=PC
-I.././inc -I../modelSource -I../../libiec61850/config
-I../../libiec61850/src/logging -I../../libiec61850/src/hal/inc
-I../../libiec61850/src/common/inc -I../../libiec61850/src/mms/inc
-I../../libiec61850/src/iec61850/inc
-I../../libiec61850/src/iec61850/inc_private
-I../../libiec61850/src/mms/inc_private -I../../libiec61850/third_party/sqlite
-I../../libiec61850/third_party/mbedtls/include -I../../libiec61850/src/tls
-I../../libiec61850/src/tls/mbedtls -I../../libiec61850/src/mms/iso_mms/asn1c
-O1 -fno-strict-aliasing -fwrapv -fno-aggressive-loop-optimizations -g -Wall -c
-fmessage-length=0 -MMD -MP -MF"src/iec61850/fsch.d" -MT"src/iec61850/fsch.o"
-o "src/iec61850/fsch.o" "../src/iec61850/fsch.c"
Finished building: ../src/iec61850/fsch.c
the preprocessed file: see attachment
-------------------------------------------------------------------------
source code snippet:
...
fsch.c:423: if (forwardBackwardDiff < 0)
fsch.c:427: timeMatchedSec += SECONDS_PER_HOUR;
...
if condition (forwardBackwardDiff < 0) is true, the addition is not executed.
Disassembly shows that no code has been generated for line 427. Debugging shows
that the code line is effectively skipped, though the condition is true.
gdb disassembly:
423 if (forwardBackwardDiff < 0)
0000000000409111: lea 0xe10(%r12),%rax
0000000000409119: pxor %xmm1,%xmm1
000000000040911d: comisd %xmm0,%xmm1
0000000000409121: cmova %rax,%r12
429 strTmRt->nextStartTimeSec=timeMatchedSec;
0000000000409125: mov %r12,0x28(%rbx)
430
strTmRt->prevStartTimeSec=timeMatchedSec-SECONDS_PER_HOUR;
0000000000409129: lea -0xe10(%r12),%rdi
0000000000409131: mov %rdi,0x20(%rbx)
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Subject: [Bug fortran/88299] [9 Regression] COMMON in a legacy module produces bogus warnings in dependent code
Date: Thu, 13 Dec 2018 11:23:00 -0000
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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-625754-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 11:25:53 2018
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Subject: [Bug c++/88395] ICE: Segmentation fault signal terminated program cc1plus, with -std=c++2a -fconcepts
Date: Thu, 13 Dec 2018 11:25:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-13
Ever confirmed|0 |1
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Nicholas Krause from comment #3)
> Is what I am getting because I don't have the class definition. I would like
> all of the code so that it builds properly and can check against a compiling
> working program.
No, it's what you're getting because you didn't use the -fconcepts flag which
is necessary to enable the language feature.
The example is fine, it's not missing anything, so I'm confirming the bug.
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Subject: [Bug fortran/88254] [F18] Support construct name for CHANGE TEAM & END TEAM
Date: Thu, 13 Dec 2018 11:26:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-13
Summary|Support construct name for |[F18] Support construct
|CHANGE TEAM & END TEAM |name for CHANGE TEAM & END
| |TEAM
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed.
>From gcc-bugs-return-625756-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 11:28:49 2018
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Subject: [Bug fortran/88299] [F18] COMMON in a legacy module produces bogus warnings in dependent code
Date: Thu, 13 Dec 2018 11:28:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[9 Regression] COMMON in a |[F18] COMMON in a legacy
|legacy module produces |module produces bogus
|bogus warnings in dependent |warnings in dependent code
|code |
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Not really a regression, rather a [F18] problem.
>From gcc-bugs-return-625757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 11:32:53 2018
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Subject: [Bug c++/88395] ICE: Segmentation fault signal terminated program cc1plus, with -std=c++2a -fconcepts
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Emmanuel Le Trong from comment #0)
> Both trunk and 8.2.1 segfault on this valid snippet
And 7.4.1 too. The flag -std=c++2a isn't relevant, only -fconcepts is needed.
>From gcc-bugs-return-625759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 11:33:23 2018
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Subject: [Bug c++/44313] g++ no longer warns about private copy constructors
Date: Thu, 13 Dec 2018 11:33:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And for completeness, the docs have been updated:
Starting with GCC 4.3.0, GCC no longer gives an error for this case. This
change is based on the intent of the C++ language committee. As of 2010-05-28,
the final proposed draft of the C++0x standard permits this code without error.
I wonder if we should just remove that whole section, nobody cares about GCC
4.2.x now. I think I proposed a patch years ago to rip that whole section out,
but it never happened.
>From gcc-bugs-return-625758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 11:33:04 2018
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Subject: [Bug fortran/88399] program segmentation faults when out-of-memory
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-12-13
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The darwin linker does not accept -Wl,--wrap=malloc:
ld: unknown option: --wrap=malloc
>From gcc-bugs-return-625760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 11:50:21 2018
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Subject: [Bug libgomp/88460] [nvptx] FAIL: libgomp.c++/for-24.C (internal compiler error)
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--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Jakub,
Can you tell whether this is a test-case problem or openmp support problem?
Thanks,
- Tom
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Subject: [Bug libgomp/88460] [nvptx] FAIL: libgomp.c++/for-24.C (internal compiler error)
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That test is huge, can you narrow it to something smaller that still ICEs?
Like, bisect to a single omp target in main and corresponding fN function +
support?
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Subject: [Bug tree-optimization/88444] [9 Regression] ICE: tree check: expected ssa_name, have integer_cst in live_on_edge, at tree-vrp.c:468; or ICE: tree check: expected ssa_name, have integer_cst in get_value_range, at vr-values.c:84
Date: Thu, 13 Dec 2018 12:20:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45225
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45225&action=edit
gcc9-pr88444-2.patch
Untested fix for the inliner bug. It wants to iterate over all newly added
basic blocks (i.e. those added during the current inlining), but stopped at
n_basic_blocks_for_fn (cfun), which can be smaller if the basic block array is
not compacted.
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88481] -O1 causes optimizer to drop 'then' clause in conditional
Date: Thu, 13 Dec 2018 12:23:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2018-12-13
CC| |amonakov at gcc dot gnu.org
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--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Without -O, optimization passes are not enabled, even if individual -f options
are passed on the command line. If you want to manually find optimizations that
affect the outcome, you need to start with -O1 and add -fno options to
selectively disable optimizations.
The attachment is missing, so changing bug status to "waiting".
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From: "He.Hongjun at zte dot com.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/88400] address-sanitizer on the cpu with only one core, may deadlock
Date: Thu, 13 Dec 2018 12:25:00 -0000
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--- Comment #5 from hhj <He.Hongjun at zte dot com.cn> ---
(In reply to Richard Biener from comment #2)
> Please provide a testcase to reproduce the issue. Also note that GCC 6 is
> no longer supported. This sounds like an issue in the libsanitizer
> interceptor
> to me, the pthread_create interceptor does
>
> // Wait until the AsanThread object is initialized and the ThreadRegistry
> // entry is in "started" state. One reason for this is that after this
> // interceptor exits, the child thread's stack may be the only thing
> holding
> // the |arg| pointer. This may cause LSan to report a leak if leak
> checking
> // happens at a point when the interceptor has already exited, but the
> stack
> // range for the child thread is not yet known.
> while (atomic_load(¶m.is_registered, memory_order_acquire) == 0)
> internal_sched_yield();
>
> but sched_yield should allow other threads to do progress. That might not
> work if the current thread is realtime of course. But isn't that a
> user error (or a kernel bug when explicitely yield()ing)?
It isn't user error or a kernel bug. the user's program is normal, and kernel
is no bug when explicitely yield()ing. It's address-sanitizer's bug. Adding
address-sanitizer, it is deadlock because of parent and child threads wait of
resources from each other.
We deal with the bug by raising the priority of parent or child threads. Then
the pthread_create is ok.
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Subject: [Bug libgomp/88460] [nvptx] FAIL: libgomp.c++/for-24.C (internal compiler error)
Date: Thu, 13 Dec 2018 12:31:00 -0000
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--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #3)
> That test is huge, can you narrow it to something smaller that still ICEs?
> Like, bisect to a single omp target in main and corresponding fN function +
> support?
Sure:
...
int results[2000];
#pragma omp declare target
void
baz (int i)
{
results[i]++;
}
void
f1 ()
{
#pragma omp distribute parallel for default(none)
for (int i = 0; i < 2000; i++)
baz (i);
}
#pragma omp end declare target
int
main ()
{
#pragma omp target teams map (tofrom: results)
f1 ();
}
...
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Subject: [Bug libgomp/88460] [nvptx] FAIL: libgomp.c++/for-24.C (internal compiler error)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45226
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45226&action=edit
gcc9-pr88460.patch
Ah, PR86660 reappeared here, copy and tweak from before that testcase has been
adjusted. Tested just with no offloading configured.
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Subject: [Bug libgomp/88460] [nvptx] FAIL: libgomp.c++/for-24.C (internal compiler error)
Date: Thu, 13 Dec 2018 12:51:00 -0000
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--- Comment #6 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #5)
> Created attachment 45226 [details]
> gcc9-pr88460.patch
>
> Ah, PR86660 reappeared here, copy and tweak from before that testcase has
> been adjusted. Tested just with no offloading configured.
And tested with nvptx offloading configured:
...
Test Run By vries on Thu Dec 13 13:49:38 2018
Native configuration is x86_64-pc-linux-gnu
=== libgomp tests ===
Schedule of variations:
unix
Running target unix
Running /home/vries/oacc/trunk/source-gcc/libgomp/testsuite/libgomp.c++/c++.exp
...
PASS: libgomp.c++/for-24.C (test for excess errors)
PASS: libgomp.c++/for-24.C execution test
Running
/home/vries/oacc/trunk/source-gcc/libgomp/testsuite/libgomp.oacc-c++/c++.exp
...
=== libgomp Summary ===
# of expected passes 2
...
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Subject: [Bug testsuite/88454] [9 regression] test case gcc.dg/tree-ssa/split-path-5.c fails after r266971
Date: Thu, 13 Dec 2018 12:52:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Dec 13 12:52:11 2018
New Revision: 267092
URL: https://gcc.gnu.org/viewcvs?rev=267092&root=gcc&view=rev
Log:
PR testsuite/88454
* gcc.dg/tree-ssa/split-path-5.c (__ctype_ptr__): Change type from
const char * to const signed char *.
(bmhi_init): Change pattern parameter's type the same. Use
__builtin_strlen instead of undeclared strlen.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/split-path-5.c
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Subject: [Bug libgomp/88460] [nvptx] FAIL: libgomp.c++/for-24.C (internal compiler error)
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Dec 13 12:53:19 2018
New Revision: 267093
URL: https://gcc.gnu.org/viewcvs?rev=267093&root=gcc&view=rev
Log:
PR libgomp/88460
* testsuite/libgomp.c++/for-24.C (results): Include it in
omp declare target region.
(main): Use map (always, tofrom: results) instead of
map (tofrom: results).
Modified:
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.c++/for-24.C
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Subject: [Bug sanitizer/88479] sanitizer should provide an option to detect conversion to signed integer that overflows
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
NOTE this has been discussed before and turned down IIRC. The reason is
because it is implementation defined it needs to be documented and we do
document it. Also my bet is even running it on gcc will cause it to happen.
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Subject: [Bug middle-end/88456] __atomic_compare_exchange implementation inconsistently used
Date: Thu, 13 Dec 2018 13:09:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #4 from Christophe Lyon <clyon at gcc dot gnu.org> ---
I think this is also related to the discussion that followed:
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg02254.html
>From gcc-bugs-return-625772-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 13:14:56 2018
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Subject: [Bug libgomp/88460] [nvptx] FAIL: libgomp.c++/for-24.C (internal compiler error)
Date: Thu, 13 Dec 2018 13:14:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Thus fixed.
>From gcc-bugs-return-625773-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 13:26:02 2018
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Subject: [Bug sanitizer/88479] sanitizer should provide an option to detect conversion to signed integer that overflows
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Note, it is no longer implementation-defined behavior in C++20, but well
defined:
"Otherwise, the result is the unique value of the destination type that is
congruent to the source integer modulo 2^N, where N is the range exponent of
the destination type.", see wg21.link/p1236 . It wouldn't surprise me if next
C standard changes similarly.
>From gcc-bugs-return-625774-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 13:32:51 2018
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Subject: [Bug libgomp/88460] [nvptx] FAIL: libgomp.c++/for-24.C (internal compiler error)
Date: Thu, 13 Dec 2018 13:32:00 -0000
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--- Comment #9 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #1)
> > Richard Biener <rguenth at gcc dot gnu.org> changed:
> >
> > What |Removed |Added
> > ----------------------------------------------------------------------------
> > Keywords| |lto
> > CC| |hubicka at gcc dot gnu.org
> >
>
> FTR, the gomp4 and openacc-gcc-{7,8}-branch branches contain a patch to emit
> an error "missing <results>" here instead of ICE-ing, submitted as "[PATCH]
> error on missing LTO symbols" here (
> https://gcc.gnu.org/ml/gcc-patches/2016-07/msg00043.html ).
Reposted patch here ( https://gcc.gnu.org/ml/gcc-patches/2018-12/msg00926.html
) with request for feedback.
>From gcc-bugs-return-625775-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 13:44:10 2018
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From: "rv at rasmusvillemoes dot dk" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88482] New: ICE when wrongly declaring __cxa_allocate_exception
Date: Thu, 13 Dec 2018 13:44:00 -0000
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Bug ID: 88482
Summary: ICE when wrongly declaring __cxa_allocate_exception
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This causes an ICE:
#include <string>
extern "C" void __cxa_allocate_exception(std::size_t size);
int f(int x)
{
if (x > 27)
throw 19;
return x+3;
}
Changing to the correct "void*" works as expected. This is arguably a "Don't do
that then", but perhaps there's some simple way to turn the ICE into a more
explicit error, a la Werror=builtin-declaration-mismatch.
>From gcc-bugs-return-625776-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 13:46:34 2018
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Subject: [Bug target/87370] [7/8/9 Regression] Inefficient return code of struct values
Date: Thu, 13 Dec 2018 13:46:00 -0000
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--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to trashyankes from comment #12)
> (In reply to H.J. Lu from comment #11)
> > (In reply to trashyankes from comment #10)
> >
> > Which GCC are you using? GCC 8.2 generates:
>
> GCC Explorer :D
>
> g++ (GCC-Explorer-Build) 9.0.0 20181211 (experimental)
>
> https://gcc.godbolt.org/z/7AQXiq
>
> Code is copy paste of test case.
> Compiler is x86-64
> Important are flags: `-O3 -march=skylake-avx512`
> Without it compile this code fine.
This is a known issue.
>From gcc-bugs-return-625777-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 13:52:38 2018
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88311] [9 Regression] mlongcall indirections are optimised away (for binutils versions that don't support AS_PLTSEQ)
Date: Thu, 13 Dec 2018 13:52:00 -0000
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Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amodra at gcc dot gnu.org
Summary|mlongcall indirections are |[9 Regression] mlongcall
|optimised away |indirections are optimised
| |away (for binutils versions
| |that don't support
| |AS_PLTSEQ)
--- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> ---
So the reason that Segher and I were seeing different results is that I was
using the default BINUTILS on the platform (2.27) and Segher was using 2.31.
The salient difference appears to be this (from auto-host.h):
2.27 .... 2.31
/* #undef HAVE_AS_PLTSEQ */ | #define HAVE_AS_PLTSEQ 1
As a second point - I checked r266557 and that produces correct code with:
GNU assembler version 2.27 (ppc64-redhat-linux) using BFD version version
2.27-28.base.el7_5.1
It's possible that the patch sequence 266599-266610 could have caused this.
>From gcc-bugs-return-625778-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 14:02:15 2018
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From: "vincent-gcc at vinc17 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/88479] sanitizer should provide an option to detect conversion to signed integer that overflows
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--- Comment #3 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to Jakub Jelinek from comment #2)
> Note, it is no longer implementation-defined behavior in C++20, but well
> defined:
>
> "Otherwise, the result is the unique value of the destination type that is
> congruent to the source integer modulo 2^N, where N is the range exponent of
> the destination type.", see wg21.link/p1236 . It wouldn't surprise me if
> next C standard changes similarly.
The C standard would have to drop ones' complement and sign-magnitude first.
In any case, this is not a good programming practice, and for some projects, it
is reasonable to avoid such cases (a function to do such a conversion
explicitly would have been a better choice). So, a new feature in the sanitizer
would be a good thing, just like -Werror=... can make the compilation of valid
programs fail but is useful to detect bugs.
>From gcc-bugs-return-625779-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 14:11:10 2018
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Subject: [Bug c/88481] -O1 causes optimizer to drop 'then' clause in conditional
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--- Comment #2 from Heinrich Seebauer <heinrich.seebauer at swistec dot de> ---
Created attachment 45227
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45227&action=edit
precompiled source of fsch.c
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Subject: [Bug c/88481] -O1 causes optimizer to drop 'then' clause in conditional
Date: Thu, 13 Dec 2018 14:13:00 -0000
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--- Comment #3 from Heinrich Seebauer <heinrich.seebauer at swistec dot de> ---
Thanks, Alexander, for your advice, I will try to isolate this symptom further.
Added the attachment ...
>From gcc-bugs-return-625781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 14:20:42 2018
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From: "moritz.kreutzer at siemens dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Thu, 13 Dec 2018 14:20:00 -0000
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--- Comment #8 from Moritz Kreutzer <moritz.kreutzer at siemens dot com> ---
Thanks for the input and for confirming that "for conditional ones (both
MASK_LOAD and MASK_STORE) the support for the cases when using a mask register
rather than a vector register with mask either hasn't been done or doesn't work
properly."
Any idea about a possible way forward to fix or implement those? As stated
above, even though I have no experience with GCC development, I'd be happy to
assist to the best of my resources if at all possible.
>From gcc-bugs-return-625782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 14:21:26 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 d/88462] All D execution tests FAIL on Solaris/SPARC
Date: Thu, 13 Dec 2018 14:21:00 -0000
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--- Comment #5 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #4 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
> Stepping through the backtrace, I see the following at Thread.initLocks
> (core/thread.d around line 1719).
[...]
> So there are two things. Firstly, the object instance is type punned from a
> void[N] array. Secondly it is aligned to pointer size, not the alignment of
> the underlying record type.
>
> So I'm certain that the problem will be fixed if `align(Mutex.alignof)` is
> replaced with `align(8)`.
Unfortunately, this doesn't work: the first time through, _locks[0] was
already 8-byte aligned and everything worked fine. This remained when
using align(8) instead. However, Mutex is 44 bytes on 32-bit
Solaris/x86, so again _locks[1] lands on a non-8 byte boundary and
pthread_mutex_init fails.
I tried rouding up the size of the _locks array members to a multiple of
8, but that let the constructor already fail the first time through
where _d_arraycopy checks that the right amount of data is copied:
_d_arraycopy -> rt.util.array.enforceRawArraysConformable ->
rt.util.array._enforceSameLength
>From gcc-bugs-return-625783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 14:41:10 2018
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Subject: [Bug libfortran/87048] [9 Regression] array_constructor_8.f90 failure on armeb
Date: Thu, 13 Dec 2018 14:41:00 -0000
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--- Comment #4 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Looks like there was a misunderstanding, I was probably not clear.
r263082 actually removed the regression I reported, because that commit reverts
the offending one. So current trunk is OK.
I'm looking again at the traces, and the different function names noticed by
Thomas seem harmless (it seems to me that the different symbols refer to the
same functions, eg _uname is weak alias for uname, etc...)
>From gcc-bugs-return-625784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 14:42:11 2018
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Subject: [Bug testsuite/88041] gdc.test tests should include that prefix in test names
Date: Thu, 13 Dec 2018 14:42:00 -0000
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--- Comment #3 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Thu Dec 13 14:41:34 2018
New Revision: 267094
URL: https://gcc.gnu.org/viewcvs?rev=267094&root=gcc&view=rev
Log:
Include gdc.test prefix in test names (PR testsuite/88041)
PR testsuite/88041
* lib/gdc-dg.exp (gdc-dg-test): Strip gdc.test prefix.
* gdc.test/gdc-test.exp (gdc-do-test): Create $subdir link.
Include $subdir in filename.
Cleanup generated source.
* gdc.test/compilable/ddoc9676a.d (EXTRA_SOURCES): Don't use
absolute path.
* gdc.test/compilable/depsOutput9948.d: Likewise.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gdc.test/compilable/ddoc9676a.d
trunk/gcc/testsuite/gdc.test/compilable/depsOutput9948.d
trunk/gcc/testsuite/gdc.test/gdc-test.exp
trunk/gcc/testsuite/lib/gdc-dg.exp
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From: "heinrich.seebauer at swistec dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88481] -O1 causes optimizer to drop 'then' clause in conditional
Date: Thu, 13 Dec 2018 14:43:00 -0000
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--- Comment #4 from Heinrich Seebauer <heinrich.seebauer at swistec dot de> ---
To isolate the cause, I suppressed several optimization options from thge -O1
group. Adding -fno-if-conversion to the options got the code correct, other -O1
options didn't change anything.
I think, this is some strong evidence that -fif-conversion causes the bug.
Proposed workaround: use option "-fno-if-conversion" in combination with -O1.
>From gcc-bugs-return-625786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 14:43:23 2018
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From: "hjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87853] _mm_cmpgt_epi8 broken with -funsigned-char
Date: Thu, 13 Dec 2018 14:43:00 -0000
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--- Comment #12 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Thu Dec 13 14:42:43 2018
New Revision: 267095
URL: https://gcc.gnu.org/viewcvs?rev=267095&root=gcc&view=rev
Log:
x86: Fix _mm_cmpgt_epi8 with -funsigned-char
Backport from mainline
2018-11-05 Xuepeng Guo <xuepeng.guo@intel.com>
PR target/87853
* config/i386/emmintrin.h (__v16qs): New to cope with option
-funsigned-char.
(_mm_cmpeq_epi8): Replace __v16qi with __v16qs.
(_mm_cmplt_epi8): Likewise.
(_mm_cmpgt_epi8): Likewise.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/i386/emmintrin.h
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82018] -Wextra should imply -Wconversion-extra
Date: Thu, 13 Dec 2018 14:44:00 -0000
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--- Comment #12 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> However, quite honestly, as a volunteer contributor to an open-source project,
> I guess I'm free to choose whether I want to contribute at all, and when
> and how to contribute. I'm sure my priorities don't always match yours
> or that of other people, but yes, believe it or not, right now this PR here
> is an issue to me, so I choose to devote some of my spare time to it,
> because it scratches a personal itch. Not much more to say.
You are indeed free to use your spare time as you like. However contributions
to a *reviewed* open-source project involve time from other people (including
bike shedding).
For the present PR if -Wconversion-extra is still important for you, why don't
you add it to your list of options?
Note the last post is over a year old, thus I am proposing to close this PR as
WONTFIX.
>From gcc-bugs-return-625788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 14:45:03 2018
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/88041] gdc.test tests should include that prefix in test names
Date: Thu, 13 Dec 2018 14:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88041
Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> ---
Fixed for 9.0.
>From gcc-bugs-return-625789-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 14:46:38 2018
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From: "jeff.science at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/60035] [PATCH] make it possible to use OMP on both sides of a fork (without violating standard)
Date: Thu, 13 Dec 2018 14:46:00 -0000
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--- Comment #11 from Jeff Hammond <jeff.science at gmail dot com> ---
Thanks for sharing. I’ve seen that bug or closely related ones before. This
is definitely one of the motivating examples for this feature set.
The only question is how many years before it gets adopted (which requires
everybody to use the latest OpenMP implementations, of course)...
Jeff
On Wed, Dec 12, 2018 at 7:21 PM jakub at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60035
>
> --- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> GCC 9 has omp_pause_resource and omp_pause_resource_all APIs as required by
> OpenMP 5.0 for this.
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
>From gcc-bugs-return-625790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 14:49:01 2018
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/88483] New: Unnecessary stack alignment
Date: Thu, 13 Dec 2018 14:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88483
Bug ID: 88483
Summary: Unnecessary stack alignment
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: ubizjak at gmail dot com
Target Milestone: ---
Target: x86
[hjl@gnu-cfl-1 tmp]$ cat x.i
struct B
{
char a[12];
int b;
};
struct B
f2 (void)
{
struct B x = {};
return x;
}
[hjl@gnu-cfl-1 tmp]$ gcc -S -mavx2 -O2 x.i
[hjl@gnu-cfl-1 tmp]$ cat x.s
.file "x.i"
.text
.p2align 4,,15
.globl f2
.type f2, @function
f2:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
xorl %eax, %eax
xorl %edx, %edx
movq %rsp, %rbp
.cfi_def_cfa_register 6
andq $-32, %rsp
leave
.cfi_def_cfa 7, 8
ret
.cfi_endproc
There is no need to realign stack.
>From gcc-bugs-return-625791-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 14:50:00 2018
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Subject: [Bug libgomp/60035] [PATCH] make it possible to use OMP on both sides of a fork (without violating standard)
Date: Thu, 13 Dec 2018 14:49:00 -0000
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--- Comment #12 from Jeff Hammond <jeff.science at gmail dot com> ---
I apologize for stupidly misinterpreting the automated message as something
else. My email client did not show the true sender address.
>From gcc-bugs-return-625793-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 15:01:08 2018
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgomp/88484] New: OpenACC wait directive without wait argument but with async clause
Date: Thu, 13 Dec 2018 15:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88484
Bug ID: 88484
Summary: OpenACC wait directive without wait argument but with
async clause
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
Component: libgomp
Assignee: tschwinge at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
CC: cltang at gcc dot gnu.org, jakub at gcc dot gnu.org
Target Milestone: ---
As made evident by this small patch:
--- libgomp/oacc-parallel.c
+++ libgomp/oacc-parallel.c
@@ -632,6 +632,8 @@ GOACC_wait (int async, int num_waits, ...)
acc_wait_all ();
else if (async == acc_async_noval)
goacc_thread ()->dev->openacc.async_wait_all_async_func
(acc_async_noval);
+ else
+ gomp_fatal ("GOACC_wait: unhandled async: %d", async);
}
int
..., we don't correctly handle "#pragma acc wait async (a)" for "a >= 0",
handling as a no-op whereas it should enqueue the appropriate wait operations
on "async (a)".
The fix might be as simple as calling "acc_wait_all_async (async)" generally,
not just for "async == acc_async_noval". I'll verify.
>From gcc-bugs-return-625792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 15:01:07 2018
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Subject: [Bug c/87924] OpenACC wait clauses without async-arguments
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-12-13
Assignee|unassigned at gcc dot gnu.org |cltang at gcc dot gnu.org
Ever confirmed|0 |1
>From gcc-bugs-return-625794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 15:07:41 2018
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Subject: [Bug c++/88478] valgrind error in cselib_record_sets
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
Code seems ok in a valgrind version of gcc trunk revision 266400
from date Nov 25, so problem looks relatively recent.
>From gcc-bugs-return-625795-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 15:10:54 2018
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Subject: [Bug libfortran/87048] [9 Regression] array_constructor_8.f90 failure on armeb
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--- Comment #5 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Created attachment 45228
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45228&action=edit
execution trace of OK static binary
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Subject: [Bug libfortran/87048] [9 Regression] array_constructor_8.f90 failure on armeb
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--- Comment #6 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Created attachment 45229
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45229&action=edit
execution trace of KO static binary
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Subject: [Bug c++/87436] [7/8/9 Regression] G++ produces >300MB .rodata section to initialize struct with big array
Date: Thu, 13 Dec 2018 15:13:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45230
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45230&action=edit
gcc9-pr87436.patch
The following patch addresses the memory consumption and to some extent compile
time issue, but doesn't change what is emitted.
Unpatched trunk:
Time variable usr sys wall
GGC
phase setup : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
1355 kB ( 0%)
phase parsing : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
638 kB ( 0%)
phase opt and generate : 506.62 (100%) 2.20 (100%) 510.10
(100%)39325772 kB (100%)
garbage collection : 4.84 ( 1%) 0.47 ( 21%) 5.36 ( 1%)
0 kB ( 0%)
callgraph construction : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
5 kB ( 0%)
ipa dead code removal : 0.01 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
ipa icf : 2.06 ( 0%) 0.00 ( 0%) 2.06 ( 0%)
0 kB ( 0%)
parser (global) : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
571 kB ( 0%)
integration : 28.56 ( 6%) 0.00 ( 0%) 28.63 ( 6%)
2621665 kB ( 7%)
tree gimplify : 7.33 ( 1%) 1.24 ( 56%) 8.58 ( 2%)
5244044 kB ( 13%)
tree VRP : 0.01 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
2 kB ( 0%)
tree Early VRP : 63.00 ( 12%) 0.00 ( 0%) 63.16 ( 12%)
5243330 kB ( 13%)
tree PTA : 0.01 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
tree CCP : 33.00 ( 7%) 0.00 ( 0%) 33.09 ( 6%)
2621664 kB ( 7%)
tree PRE : 43.59 ( 9%) 0.00 ( 0%) 43.70 ( 9%)
2621665 kB ( 7%)
tree FRE : 92.77 ( 18%) 0.00 ( 0%) 93.02 ( 18%)
7864992 kB ( 20%)
tree forward propagate : 200.09 ( 39%) 0.01 ( 0%) 200.62 (
39%)13108320 kB ( 33%)
tree conservative DCE : 0.02 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
tree loop optimization : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
expand : 1.80 ( 0%) 0.00 ( 0%) 1.80 ( 0%)
5 kB ( 0%)
integrated RA : 0.09 ( 0%) 0.00 ( 0%) 0.10 ( 0%)
24 kB ( 0%)
final : 29.41 ( 6%) 0.47 ( 21%) 29.92 ( 6%)
1 kB ( 0%)
rest of compilation : 0.02 ( 0%) 0.01 ( 0%) 0.01 ( 0%)
2 kB ( 0%)
TOTAL : 506.63 2.20 510.11
39327775 kB
Patched trunk:
Time variable usr sys wall
GGC
phase setup : 0.00 ( 0%) 0.14 ( 15%) 0.14 ( 0%)
1355 kB ( 64%)
phase opt and generate : 27.58 (100%) 0.49 ( 53%) 28.11 ( 92%)
112 kB ( 5%)
phase finalize : 0.01 ( 0%) 0.29 ( 32%) 2.26 ( 7%)
0 kB ( 0%)
final : 27.57 (100%) 0.49 ( 53%) 28.10 ( 92%)
1 kB ( 0%)
initialize rtl : 0.01 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
12 kB ( 1%)
TOTAL : 27.59 0.92 30.51
2116 kB
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Subject: [Bug libfortran/87048] [9 Regression] array_constructor_8.f90 failure on armeb
Date: Thu, 13 Dec 2018 15:13:00 -0000
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--- Comment #7 from Christophe Lyon <clyon at gcc dot gnu.org> ---
I've attached the execution traces from PR25829 here for clarity.
Looking at them, I've noticed a different execution path in
build.4947.constprop.0, starting at line 5477 in the "OK" file, and line 5483
in the "KO" file.
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Subject: [Bug d/87824] x86_64-linux multilib issues
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Rainer Orth <ro at gcc dot gnu.org> changed:
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--- Comment #16 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 45231
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45231&action=edit
Patch for cppa.d with non-default multilib failure
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/87824] x86_64-linux multilib issues
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--- Comment #17 from Rainer Orth <ro at gcc dot gnu.org> ---
(In reply to Iain Buclaw from comment #6)
[...]
> > Running target unix
> > FAIL: runnable/cppa.d execution test
> > FAIL: runnable/cppa.d -g execution test
> > FAIL: runnable/cppa.d -g -shared-libphobos execution test
> > FAIL: runnable/cppa.d -shared-libphobos execution test
>
> Have now reproduced, the test checks old behaviour that I dropped support
> for long ago. The first failed attempt to have a type that maps to C 'long'
> and 'unsigned long' had a 'struct __c_long' type that expected the compiler
> to magically pass it around as the correct integer type. This had
> passed/gone unnoticed on x86_64 because 'struct{long}' and 'long' are passed
> in the same way.
>
> Support should have been removed from the dmd front-end when it was dropped
> from the library, but it still lives on in the testsuite.
I'm seeing the same not only on Linux/x86_64, but also on Solaris/x86, only
for the non-default multilib.
The failure is the same however:
In file included from runnable/extra-files/cppb.cpp:36:^M
/vol/gcc/src/hg/trunk/dist/gcc/testsuite/../../libstdc++-v3/libsupc++/exception:37:10:
fatal error: bits/c++config.h: No such file or directory^M
Looking at the -I flags passed, it's obvious that they are wrong: on
Linux/x86_64 there is
-I/var/scratch/gcc/regression/trunk/4.17.3-gcc-gas-gld/build/x86_64-pc-linux-gnu/32/libstdc++-v3/include/32
while on Solaris/x86 it's
-I/var/gcc/regression/trunk/11.3-gcc-gas/build/i386-pc-solaris2.11/amd64/libstdc++-v3/include/amd64
neither of which exist: the last component should be $target_triplet instead
of $target. Fixing this as in the attached patch lets the test PASS for me
on both x86_64-pc-linux-gnu and i386-pc-solaris2.11 (32 and 64-bit each).
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Subject: [Bug target/87853] _mm_cmpgt_epi8 broken with -funsigned-char
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for GCC 9 and 7/8 branches.
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/88481] -O1 causes optimizer to drop 'then' clause in conditional
Date: Thu, 13 Dec 2018 15:54:00 -0000
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--- Comment #5 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
The code shown in the opening comment looks fine to me, so please isolate the
issue further using debug counters.
Add -fdbg-cnt=if_conversion:99,if_after_combine:99 to -O1. This should lead to
broken code as with plain -O1.
Add -fdbg-cnt=if_conversion:0,if_after_combine:0 to -O1. This should lead to
correct code as with -O1 -fno-if-conversion.
Then you can try 99/0 and 0/99 combinations to find which of two passes is
broken. After that you can bisect by the value of debug counter to find exact
threshold at which it becomes broken (e.g. 0/42 works, 0/43 breaks). Please
attach the two resulting assembly dumps obtained with -S after that.
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87531] [8/9 Regression] assignment operator does nothing if performed as a call via operatorDate: Thu, 13 Dec 2018 15:58:00 -0000
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--- Comment #10 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Thu Dec 13 15:57:24 2018
New Revision: 267096
URL: https://gcc.gnu.org/viewcvs?rev=267096&root=gcc&view=rev
Log:
[PR c++/87531] Fix second bug
https://gcc.gnu.org/ml/gcc-patches/2018-12/msg00929.html
PR c++/87531
* class.c (finish_struct): Set DECL_CONTEXT of template assign op.
* name-lookup.c (get_class_binding_direct): Don't strip using-decl
of overload here.
* parser.c (cp_parser_postfix_expression): Cope with using decl in
overload set.
* semantics.c (finish_id_expr): Likewise.
* g++.dg/lookup/pr87531-2.C: New.
Added:
trunk/gcc/testsuite/g++.dg/lookup/pr87531-2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/cp/name-lookup.c
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>From gcc-bugs-return-625804-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 16:18:01 2018
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88481] -O1 causes optimizer to drop 'then' clause in conditional
Date: Thu, 13 Dec 2018 16:18:00 -0000
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--- Comment #6 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
And just to be sure, can you confirm that -fno-if-conversion changes program
behavior (the testcase is not executable so I cannot check), and the issue is
not about debug info quality (i.e. that single-stepping in the debugger does
not behave as you expect, but overall the function computes correct values)?
>From gcc-bugs-return-625805-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 16:22:28 2018
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From: "rearnsha at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/88469] Unaligned stack access on arm (in particular armv5)
Date: Thu, 13 Dec 2018 16:22:00 -0000
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Sigh, this is a PCS layout bug for argument marshalling. I think it can only
happen when a struct inherits 64-bit alignment from a bit-field. In this case,
the alignment on the bit-field is 1, but it's real alignment for the purposes
of type-layout is derived from the bit-field's type.
I have a simple fix, but I need to think a bit more about how we might need to
warn about this change occurring - made more complicated by the fact that we
already have code to warn about a previous ABI bug in this area.
>From gcc-bugs-return-625806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 16:23:51 2018
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From: "anlauf at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/88399] program segmentation faults when out-of-memory
Date: Thu, 13 Dec 2018 16:23:00 -0000
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Harald Anlauf <anlauf at gmx dot de> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Harald Anlauf <anlauf at gmx dot de> ---
AFAICT the problem seems fixed since 7.1, it is still present at 6.1.
Looking at the tree dump, one can see that gfortran <= 6 initialized
the derived type even when the malloc failed. It is now protected by
an appropriate if/goto.
I recommend to update to 7.1+
>From gcc-bugs-return-625807-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 16:27:55 2018
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/88425] suboptimal code for a<imm?-1:0
Date: Thu, 13 Dec 2018 16:27:00 -0000
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--- Comment #4 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Thanks! Should this be closed as fixed now?
>From gcc-bugs-return-625808-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 16:28:37 2018
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Subject: [Bug target/88425] suboptimal code for a<imm?-1:0
Date: Thu, 13 Dec 2018 16:28:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
.
>From gcc-bugs-return-625809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 16:35:00 2018
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From: "sss@li-snyder.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88485] New: [9 regression] parse error on explicitly specialized assignment call
Date: Thu, 13 Dec 2018 16:34:00 -0000
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Bug ID: 88485
Summary: [9 regression] parse error on explicitly specialized
assignment call
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hi -
gcc9 rejects the following code:
-------------------------------------------------------------
template <class T> class Base {};
class Block : public Base<Block> {};
template<typename T>
class Foo
{
template<typename Other>
Block& operator=(const Base<Other>& other);
Block& operator=(const Block& other)
{
return operator=<Block>(other);
}
};
-------------------------------------------------------------
$ cc1plus -quiet -version x.cc
GNU C++14 (GCC) version 9.0.0 20181212 (experimental) (x86_64-pc-linux-gnu)
compiled by GNU C version 9.0.0 20181212 (experimental), GMP version
6.1.2, MPFR version 3.1.6-p2, MPC version 1.0.2, isl version isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++14 (GCC) version 9.0.0 20181212 (experimental) (x86_64-pc-linux-gnu)
compiled by GNU C version 9.0.0 20181212 (experimental), GMP version
6.1.2, MPFR version 3.1.6-p2, MPC version 1.0.2, isl version isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: c0eebf4a7781166f39f275d6d099325f
x.cc: In member function ‘Block& Foo<T>::operator=(const Block&)’:
x.cc:12:27: error: expected primary-expression before ‘>’ token
12 | return operator=<Block>(other);
| ^
-------------------------------------------------------------
The same code is accepted by both gcc 8.2.1 and clang 6.0.1.
The error also goes away if the class `Foo' is changed to be a non-template
class,
or if `operator=' is changed to a named method.
>From gcc-bugs-return-625810-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 16:38:12 2018
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Subject: [Bug target/88457] ICE: Max. number of generated reload insns per insn is achieved (90)
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--- Comment #2 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> ira-max-conflict-table-size=0 might be an impossible value - Vlad?
Any size is possible. Simply in this case conflict table is not built and
simple RA (kind of linear scan) is used and this algorithm uses only live
ranges.
>From gcc-bugs-return-625811-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 16:41:07 2018
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Subject: [Bug c++/88485] [9 regression] parse error on explicitly specialized assignment call
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This compiles fine for me.
>From gcc-bugs-return-625812-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 16:44:04 2018
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Subject: [Bug c/88481] -O1 causes optimizer to drop 'then' clause in conditional
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--- Comment #7 from Heinrich Seebauer <heinrich.seebauer at swistec dot de> ---
Created attachment 45232
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45232&action=edit
zipped asm files for three cases
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Subject: [Bug c++/87436] [7/8/9 Regression] G++ produces >300MB .rodata section to initialize struct with big array
Date: Thu, 13 Dec 2018 16:52:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45233
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45233&action=edit
gcc9-pr87436-2.patch
Incremental patch to gimplify assignments from ctors with largish RANGE_EXPRs
using runtime loops rather than copying object from huge .rodata constant.
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Subject: [Bug c++/82294] Array of objects with constexpr constructors initialized from space-inefficient memory image
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87436#c4 and
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87436#c5.
*** This bug has been marked as a duplicate of bug 87436 ***
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Subject: [Bug c++/87436] [7/8/9 Regression] G++ produces >300MB .rodata section to initialize struct with big array
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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CC| |headch at gmail dot com
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 82294 has been marked as a duplicate of this bug. ***
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From: "heinrich.seebauer at swistec dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/88481] -O1 causes optimizer to drop 'then' clause in conditional
Date: Thu, 13 Dec 2018 16:56:00 -0000
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--- Comment #8 from Heinrich Seebauer <heinrich.seebauer at swistec dot de> ---
Sorry, my comment was lost completely after uploading the attachment.
Try again...
So I hope, I got this right.
-fdbg-cnt=if_conversion:xx,if_after_combine:yy
xx yy result
-----------------------
20 20 success
20 21 fail
0 21 fail
21 20 fail
tested with -fdbg-cnt=if_conversion:20,if_after_combine:21 -fno-if-conversion
and got functioning code.
I did gdb stepping in the source file where I observed, that the condition was
true, but the branch was not executed. Same with the tests here - they were all
strepped via source code.
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Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Dec 13 17:01:50 2018
New Revision: 267097
URL: https://gcc.gnu.org/viewcvs?rev=267097&root=gcc&view=rev
Log:
PR tree-optimization/88464
* tree-vect-stmts.c (vect_build_gather_load_calls): Handle INTEGER_TYPE
masktype if mask is non-NULL.
(vectorizable_load): Don't reject masked gather loads if masktype
in the decl is INTEGER_TYPE.
* gcc.target/i386/avx512f-pr88462-1.c: New test.
* gcc.target/i386/avx512f-pr88462-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88462-1.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88462-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-stmts.c
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Subject: [Bug fortran/88486] ICE in gfc_conv_scalarized_array_ref, at fortran/trans-array.c:3401
Date: Thu, 13 Dec 2018 17:03:00 -0000
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
Compiles and runs when wrapped in a program :
$ cat z2.f90
program p
character(:), allocatable :: x(:)
x = ['bcd']
x = ['a'//x//'e']
print *, size(x), len(x), x
end
$ gfortran-9-20181209 z2.f90 -static-libgfortran
$ a.out
1 5 abcde
$
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Subject: [Bug fortran/88486] New: ICE in gfc_conv_scalarized_array_ref, at fortran/trans-array.c:3401
Date: Thu, 13 Dec 2018 17:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88486
Bug ID: 88486
Summary: ICE in gfc_conv_scalarized_array_ref, at
fortran/trans-array.c:3401
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Target Milestone: ---
Affects versions down to at least gfortran-5.
Under the hood related to pr85686.
$ cat z1.f90
subroutine s(x)
character(:), allocatable :: x(:)
x = ['bcd']
x = ['a'//x//'e']
print *, x
end
$ gfortran-9-20181209 -c z1.f90
z1.f90:4:0:
4 | x = ['a'//x//'e']
|
internal compiler error: Segmentation fault
0xb2f31f crash_signal
../../gcc/toplev.c:326
0x6caa5d gfc_conv_scalarized_array_ref
../../gcc/fortran/trans-array.c:3401
0x6cb82c gfc_conv_array_ref(gfc_se*, gfc_array_ref*, gfc_expr*, locus*)
../../gcc/fortran/trans-array.c:3554
0x6f468e gfc_conv_variable
../../gcc/fortran/trans-expr.c:2773
0x6f130a gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:8047
0x6f5039 gfc_conv_string_length(gfc_charlen*, gfc_expr*, stmtblock_t*)
../../gcc/fortran/trans-expr.c:2243
0x6c69f6 get_array_charlen
../../gcc/fortran/trans-array.c:6979
0x6c6b07 get_array_charlen
../../gcc/fortran/trans-array.c:6922
0x6c698e get_array_charlen
../../gcc/fortran/trans-array.c:6911
0x6d400c gfc_conv_expr_descriptor(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-array.c:7296
0x6d480e get_array_ctor_all_strlen
../../gcc/fortran/trans-array.c:2025
0x6d4916 get_array_ctor_strlen(stmtblock_t*, splay_tree_s*, tree_node**)
../../gcc/fortran/trans-array.c:2142
0x6d25e7 trans_array_constructor
../../gcc/fortran/trans-array.c:2473
0x6d25e7 gfc_add_loop_ss_code
../../gcc/fortran/trans-array.c:2835
0x6d2e65 gfc_conv_loop_setup(gfc_loopinfo*, locus*)
../../gcc/fortran/trans-array.c:5129
0x6ff8db gfc_trans_assignment_1
../../gcc/fortran/trans-expr.c:10208
0x6c278f trans_code
../../gcc/fortran/trans.c:1822
0x73084f gfc_trans_block_construct(gfc_code*)
../../gcc/fortran/trans-stmt.c:2066
0x6c2937 trans_code
../../gcc/fortran/trans.c:1918
0x6ea054 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6509
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Subject: [Bug middle-end/88487] New: union prevents autovectorization
Date: Thu, 13 Dec 2018 17:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88487
Bug ID: 88487
Summary: union prevents autovectorization
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: bugzilla@poradnik-webmastera.com
Target Milestone: ---
When pointer to data is inside union, loops are not autovectorized. This also
happen when I removed "i" field from union, so it had only one field. Code
compiled with -O3 -mavx
[code]
struct S1
{
union
{
double* __restrict__ * __restrict__ d;
int* __restrict__ * __restrict__ i;
} u;
};
struct S2
{
double* __restrict__ * __restrict__ d;
};
void test1(S1* __restrict__ s1, S1* __restrict__ s2)
{
for (int n = 0; n < 2; ++n)
{
s1->u.d[n][0] = s2->u.d[n][0];
s1->u.d[n][1] = s2->u.d[n][1];
}
}
void test2(S2* __restrict__ s1, S2* __restrict__ s2)
{
for (int n = 0; n < 2; ++n)
{
s1->d[n][0] = s2->d[n][0];
s1->d[n][1] = s2->d[n][1];
}
}
[/code]
[asm]
test1(S1*, S1*):
mov rdx, QWORD PTR [rsi]
mov rax, QWORD PTR [rdi]
mov rsi, QWORD PTR [rdx]
mov rcx, QWORD PTR [rax]
mov rdx, QWORD PTR [rdx+8]
mov rax, QWORD PTR [rax+8]
vmovsd xmm0, QWORD PTR [rsi]
vmovsd QWORD PTR [rcx], xmm0
vmovsd xmm0, QWORD PTR [rsi+8]
vmovsd QWORD PTR [rcx+8], xmm0
vmovsd xmm0, QWORD PTR [rdx]
vmovsd QWORD PTR [rax], xmm0
vmovsd xmm0, QWORD PTR [rdx+8]
vmovsd QWORD PTR [rax+8], xmm0
ret
test2(S2*, S2*):
mov rdx, QWORD PTR [rsi]
mov rax, QWORD PTR [rdi]
mov rcx, QWORD PTR [rdx]
mov rdx, QWORD PTR [rdx+8]
vmovupd xmm0, XMMWORD PTR [rcx]
mov rcx, QWORD PTR [rax]
mov rax, QWORD PTR [rax+8]
vmovups XMMWORD PTR [rcx], xmm0
vmovupd xmm0, XMMWORD PTR [rdx]
vmovups XMMWORD PTR [rax], xmm0
ret
[/asm]
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88488] New: ICE in gfc_trans_array_constructor_subarray, at fortran/trans-array.c:1646
Date: Thu, 13 Dec 2018 17:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88488
Bug ID: 88488
Summary: ICE in gfc_trans_array_constructor_subarray, at
fortran/trans-array.c:1646
Product: gcc
Version: 9.0
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Affects versions down to at least gfortran-5 :
$ cat z1.f90
program p
type t
integer :: n = 789
end type
type(t), parameter :: a(2) = t()
type(t) :: b(2)
b = [a]
end
$ gfortran-9-20181209 -c z1.f90
z1.f90:7:0:
7 | b = [a]
|
internal compiler error: in gfc_trans_array_constructor_subarray, at
fortran/trans-array.c:1646
0x6daccd gfc_trans_array_constructor_subarray
../../gcc/fortran/trans-array.c:1646
0x6daccd gfc_trans_array_constructor_value
../../gcc/fortran/trans-array.c:1774
0x6d279c trans_array_constructor
../../gcc/fortran/trans-array.c:2558
0x6d279c gfc_add_loop_ss_code
../../gcc/fortran/trans-array.c:2835
0x6d2e65 gfc_conv_loop_setup(gfc_loopinfo*, locus*)
../../gcc/fortran/trans-array.c:5129
0x6ff8db gfc_trans_assignment_1
../../gcc/fortran/trans-expr.c:10208
0x6c278f trans_code
../../gcc/fortran/trans.c:1822
0x6ea054 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6509
0x6765c6 translate_all_program_units
../../gcc/fortran/parse.c:6128
0x6765c6 gfc_parse_file()
../../gcc/fortran/parse.c:6331
0x6bf27f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug target/67288] [7/8/9 regression] non optimal simple function (useless additional shift/remove/shift/add)
Date: Thu, 13 Dec 2018 17:06:00 -0000
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--- Comment #17 from Jeffrey A. Law <law at redhat dot com> ---
Yea, I was pretty sure our current structure wasn't well suited for doing
combinations in an EBB, but I was much less sure about the analysis side.
>From gcc-bugs-return-625823-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:06:17 2018
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Subject: [Bug fortran/88488] ICE in gfc_trans_array_constructor_subarray, at fortran/trans-array.c:1646
Date: Thu, 13 Dec 2018 17:06:00 -0000
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
Compiles and runs without attribute "parameter" :
$ cat z2.f90
program p
type t
integer :: n = 789
end type
type(t) :: a(2) = t()
type(t) :: b(2)
b = [a]
print *, size(b), b
end
$ gfortran-9-20181209 z2.f90 -static-libgfortran
$ a.out
2 789 789
$
>From gcc-bugs-return-625824-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:07:48 2018
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Subject: [Bug c/88481] -O1 causes optimizer to drop 'then' clause in conditional
Date: Thu, 13 Dec 2018 17:07:00 -0000
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--- Comment #9 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Thanks. I still don't see what's wrong. Are you testing only by single-stepping
in gdb, or does your program overall behave differently with/without
if-conversion?
In other words, do you see if-conversion causing wrong code, or only worse
debug experience?
>From gcc-bugs-return-625825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:11:52 2018
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Subject: [Bug middle-end/88487] union prevents autovectorization
Date: Thu, 13 Dec 2018 17:11:00 -0000
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--- Comment #1 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
Update: when pointers to data are copied to local variables like below,
autovectorization starts working again.
[code]
void test3(S2* __restrict__ s1, S2* __restrict__ s2)
{
double* __restrict__ * __restrict__ d1 = s1->d;
double* __restrict__ * __restrict__ d2 = s2->d;
for (int n = 0; n < 2; ++n)
{
d1[n][0] = d2[n][0];
d1[n][1] = d2[n][1];
}
}
[/code]
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88486] ICE in gfc_conv_scalarized_array_ref, at fortran/trans-array.c:3401
Date: Thu, 13 Dec 2018 17:13:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-13
Blocks| |68241
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Affects versions down to at least gfortran-5.
Down to at least 4.8.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
[Bug 68241] [meta-bug] [F03] Deferred-length character
>From gcc-bugs-return-625827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:14:42 2018
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Subject: [Bug middle-end/88487] union prevents autovectorization
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--- Comment #2 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
I spotted that test3 in previous comment uses structure S2 which does not have
union inside. When I changes it to use S1, I got non-vectorized code. So this
workaround does not work.
>From gcc-bugs-return-625829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:20:27 2018
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Subject: [Bug target/88469] AAPCS - Struct with 64-bit bitfield may be passed in wrong registers
Date: Thu, 13 Dec 2018 17:20:00 -0000
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--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Simpler test-case.
struct x
{
long long a : 61;
};
void bar (int, struct x);
int foo (int a, int b, int c, struct x d)
{
bar (a, d);
return 2;
}
This does not seem to generate ldrd, but does show that 'd' is passed partially
in r3 and partially on the stack, when it should be entirely on the stack.
Correct code should be something like:
push {r4, lr}
ldrd r2, [sp, #8]
bl bar
mov r0, #2
pop {r4, pc}
But we currently generate:
sub sp, sp, #8
push {r4, lr}
ldr r2, [sp, #16]
mov r1, r3
str r3, [sp, #12]
bl bar
pop {r4, lr}
mov r0, #2
add sp, sp, #8
bx lr
>From gcc-bugs-return-625828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:20:16 2018
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Subject: [Bug fortran/88488] ICE in gfc_trans_array_constructor_subarray, at fortran/trans-array.c:1646
Date: Thu, 13 Dec 2018 17:20:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-13
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Affects versions down to at least gfortran-5
Down to at least 4.8.
>From gcc-bugs-return-625830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:26:30 2018
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Subject: [Bug c++/88485] [9 regression] parse error on explicitly specialized assignment call
Date: Thu, 13 Dec 2018 17:26:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Maybe dup of PR87531 then.
>From gcc-bugs-return-625832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:34:15 2018
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Subject: [Bug c++/87531] [8/9 Regression] assignment operator does nothing if performed as a call via operatorDate: Thu, 13 Dec 2018 17:34:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |sss@li-snyder.org
--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
*** Bug 88485 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-625831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:34:13 2018
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Subject: [Bug c++/88485] [9 regression] parse error on explicitly specialized assignment call
Date: Thu, 13 Dec 2018 17:34:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Seems plausible.
*** This bug has been marked as a duplicate of bug 87531 ***
>From gcc-bugs-return-625833-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:37:17 2018
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From: "vmakarov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/88414] [9 Regression] ICE in lra_assign, at lra-assigns.c:1624
Date: Thu, 13 Dec 2018 17:37:00 -0000
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--- Comment #4 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #3)
> Started with r257077. In any case, it seems to be a LRA error-recovery bug.
> We first properly diagnose that the inline asm has constraints that are
> impossible to resolve ("=d" on two different variables). Vlad, do you think
> you could have a look?
Yes, constraints are impossible and LRA should generate error "operand has
impossible constraints".
I am working on it and the fix will be ready today or tomorrow.
>From gcc-bugs-return-625834-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:40:29 2018
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/88489] New: [9 Regression] FAIL: gcc.target/i386/avx512f-vfixupimmss-2.c execution test
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Bug ID: 88489
Summary: [9 Regression] FAIL:
gcc.target/i386/avx512f-vfixupimmss-2.c execution test
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Priority: P3
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CC: wei3.xiao at intel dot com
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Target: x86
On AVX512 machine, r265827 caused
FAIL: gcc.target/i386/avx512f-vfixupimmsd-2.c execution test
>From gcc-bugs-return-625835-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:49:06 2018
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87531] [8/9 Regression] assignment operator does nothing if performed as a call via operatorDate: Thu, 13 Dec 2018 17:49:00 -0000
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--- Comment #12 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Thu Dec 13 17:47:52 2018
New Revision: 267099
URL: https://gcc.gnu.org/viewcvs?rev=267099&root=gcc&view=rev
Log:
[PR c++/87531] Fix second bug
https://gcc.gnu.org/ml/gcc-patches/2018-12/msg00929.html
PR c++/87531
* class.c (finish_struct): Set DECL_CONTEXT of template assign op.
* name-lookup.c (get_class_binding_direct): Don't strip using-decl
of overload here.
* parser.c (cp_parser_postfix_expression): Cope with using decl in
overload set.
* semantics.c (finish_id_expr): Likewise.
* g++.dg/lookup/pr87531-2.C: New.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/lookup/pr87531-2.C
Modified:
branches/gcc-8-branch/gcc/cp/ChangeLog
branches/gcc-8-branch/gcc/cp/class.c
branches/gcc-8-branch/gcc/cp/name-lookup.c
branches/gcc-8-branch/gcc/cp/parser.c
branches/gcc-8-branch/gcc/cp/semantics.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-625836-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:52:17 2018
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Subject: [Bug libgomp/60035] [PATCH] make it possible to use OMP on both sides of a fork (without violating standard)
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--- Comment #13 from Nathaniel J. Smith <njs at pobox dot com> ---
Unfortunately, AFAICT, the omp_pause_resource APIs don't actually solve the
problem.
They're fine and useful if you have a single piece of code that wants to use
both omp and fork(). But, this was never a *huge* issue, because if you knew
you were using omp then you also knew that fork() wasn't going to work, and
could use some workaround.
The really nasty case is when the code using omp and the code using fork() are
in entirely different pieces of code, that don't know about each other (e.g.,
different shared libraries). That's the motivating use case for this patch. I
don't see how the omp_pause_resource APIs help with this. The best you could do
is to set up a pre-fork hook to call omp_pause_resource_all, but that would be
equivalent to my first patch that got rejected for breaking standards-compliant
programs.
(In practice, the effect of this issue has been that the whole scientific
python ecosystem simply avoids omp where-ever possible. That's why no one's
been nagging about this patch. It still seems like a shame to me that all this
work goes into the omp runtime and then it gets ruled out for so many users for
such a trivial thing, but so it goes I guess.)
>From gcc-bugs-return-625837-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 17:57:52 2018
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Subject: [Bug target/42778] Superfluous stack management code is generated
Date: Thu, 13 Dec 2018 17:57:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |4.8.0
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for 4.8.
>From gcc-bugs-return-625838-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 18:04:51 2018
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/38658] trivial try/catch statement not eliminated
Date: Thu, 13 Dec 2018 18:04:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |4.3.5, 4.4.7, 4.8.5, 4.9.4,
| |5.4.0, 6.4.0, 7.3.0, 8.2.0,
| |9.0
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
The optimization is not implemented yet/still. No compiler on Godbolt does it.
>From gcc-bugs-return-625839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 18:06:59 2018
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From: "bugzilla@poradnik-webmastera.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/88490] New: Missed autovectorization when indices are different
Date: Thu, 13 Dec 2018 18:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88490
Bug ID: 88490
Summary: Missed autovectorization when indices are different
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
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Code below reads and writes data using different indices what is checked by
"if" above loop. This can be autovectorized, as both memory areas do not
overlap. Code compiled with -O3 -march=skylake-avx512
[code]
struct S
{
double* __restrict__ * __restrict__ d;
};
void test(S* __restrict__ s, int n, int k)
{
if (n > k)
{
for (int n = 0; n < 2; ++n)
{
s->d[n][0] = s->d[k][0];
s->d[n][1] = s->d[k][1];
}
}
}
[/code]
[asm]
test(S*, int, int):
cmp esi, edx
jle .L3
mov rcx, QWORD PTR [rdi]
movsx rdx, edx
mov rax, QWORD PTR [rcx+rdx*8]
mov rdx, QWORD PTR [rcx]
vmovsd xmm0, QWORD PTR [rax]
vmovsd QWORD PTR [rdx], xmm0
vmovsd xmm0, QWORD PTR [rax+8]
vmovsd QWORD PTR [rdx+8], xmm0
vmovsd xmm0, QWORD PTR [rax]
mov rdx, QWORD PTR [rcx+8]
vmovsd QWORD PTR [rdx], xmm0
vmovsd xmm0, QWORD PTR [rax+8]
vmovsd QWORD PTR [rdx+8], xmm0
.L3:
ret
[/asm]
>From gcc-bugs-return-625840-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 18:10:43 2018
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Subject: [Bug middle-end/88490] Missed autovectorization when indices are different
Date: Thu, 13 Dec 2018 18:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88490
--- Comment #1 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
Ehh, small typo. This is correct version, also not vectorized:
[code]
struct S
{
double* __restrict__ * __restrict__ d;
};
void test(S* __restrict__ s, int n, int k)
{
if (n > k)
{
for (int i = 0; i < 2; ++i)
{
s->d[n][0] = s->d[k][0];
s->d[n][1] = s->d[k][1];
}
}
}
[/code]
[asm]
test(S*, int, int):
cmp esi, edx
jle .L3
mov rax, QWORD PTR [rdi]
movsx rdx, edx
mov rdx, QWORD PTR [rax+rdx*8]
movsx rsi, esi
vmovsd xmm0, QWORD PTR [rdx]
mov rax, QWORD PTR [rax+rsi*8]
vmovsd QWORD PTR [rax], xmm0
vmovsd xmm0, QWORD PTR [rdx+8]
vmovsd QWORD PTR [rax+8], xmm0
vmovsd xmm0, QWORD PTR [rdx]
vmovsd QWORD PTR [rax], xmm0
vmovsd xmm0, QWORD PTR [rdx+8]
vmovsd QWORD PTR [rax+8], xmm0
.L3:
ret
[/asm]
>From gcc-bugs-return-625841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 18:12:58 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87531] [8/9 Regression] assignment operator does nothing if performed as a call via operatorDate: Thu, 13 Dec 2018 18:12:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
--- Comment #13 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Refixed trunk & gcc-8
>From gcc-bugs-return-625842-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 19:18:16 2018
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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/88491] New: new test case allocfail.sh in r267054 fails if dash is the default shell (/bin/sh)
Date: Thu, 13 Dec 2018 19:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88491
Bug ID: 88491
Summary: new test case allocfail.sh in r267054 fails if dash is
the default shell (/bin/sh)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
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Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
FAIL: allocfail.sh
==================
/home/seurer/gcc/gcc-trunk/libbacktrace/allocfail.sh: 35: set: Illegal option
-o pipefail
FAIL allocfail.sh (exit status: 2)
This fails on all our newer systems running Ubuntu 18.04 which link /bin/sh to
dash. The failing line is:
set -o pipefail
If I try that under dash on other systems it fails there, too.
>From gcc-bugs-return-625843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 19:43:09 2018
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Subject: [Bug c++/88482] ICE when wrongly declaring __cxa_allocate_exception
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-12-13
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45234
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45234&action=edit
gcc9-pr88482.patch
Untested fix.
>From gcc-bugs-return-625844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 19:46:12 2018
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Subject: [Bug rtl-optimization/88416] [8/9 Regression] ICE in in df_uses_record, at df-scan.c:3013
Date: Thu, 13 Dec 2018 19:46:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Dec 13 19:44:50 2018
New Revision: 267105
URL: https://gcc.gnu.org/viewcvs?rev=267105&root=gcc&view=rev
Log:
PR rtl-optimization/88416
* valtrack.c (cleanup_auto_inc_dec): Handle pre/post-inc/dec/modify
even if !AUTO_INC_DEC.
* gcc.target/i386/pr88416.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr88416.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/valtrack.c
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Subject: [Bug rtl-optimization/88416] [8 Regression] ICE in in df_uses_record, at df-scan.c:3013
Date: Thu, 13 Dec 2018 20:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] ICE in in |[8 Regression] ICE in in
|df_uses_record, at |df_uses_record, at
|df-scan.c:3013 |df-scan.c:3013
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Thu, 13 Dec 2018 20:02:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For masked gathers it is now fixed on the trunk, for masked stores I'll have a
look tomorrow.
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Subject: [Bug libstdc++/71044] Optimize std::filesystem implementation
Date: Thu, 13 Dec 2018 20:34:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Dec 13 20:33:55 2018
New Revision: 267106
URL: https://gcc.gnu.org/viewcvs?rev=267106&root=gcc&view=rev
Log:
PR libstdc++/71044 optimize std::filesystem::path construction
This new implementation has a smaller footprint than the previous
implementation, due to replacing std::vector<_Cmpt> with a custom pimpl
type that only needs a single pointer. The _M_type enumeration is also
combined with the pimpl type, by using a tagged pointer, reducing
sizeof(path) further still.
Construction and modification of paths is now done more efficiently, by
splitting the input into a stack-based buffer of string_view objects
instead of a dynamically-allocated vector containing strings. Once the
final size is known only a single allocation is needed to reserve space
for it. The append and concat operations no longer require constructing
temporary path objects, nor re-parsing the entire native pathname.
This results in algorithmic improvements to path construction, and
working with large paths is much faster.
PR libstdc++/71044
* include/bits/fs_path.h (path::path(path&&)): Add noexcept when
appropriate. Move _M_cmpts instead of reparsing the native pathname.
(path::operator=(const path&)): Do not define as defaulted.
(path::operator/=, path::append): Call _M_append.
(path::concat): Call _M_concat.
(path::path(string_type, _Type): Change type of first parameter to
basic_string_view<value_type>.
(path::_M_append(basic_string_view<value_type>)): New member function.
(path::_M_concat(basic_string_view<value_type>)): New member function.
(_S_convert(value_type*, __null_terminated)): Return string view.
(_S_convert(const value_type*, __null_terminated)): Return string view.
(_S_convert(value_type*, value_type*))
(_S_convert(const value_type*, const value_type*)): Add overloads for
pairs of pointers.
(_S_convert(_InputIterator, __null_terminated)): Construct string_type
explicitly, for cases where _S_convert returns a string view.
(path::_S_is_dir_sep): Replace with non-member is_dir_sep.
(path::_M_trim, path::_M_add_root_name, path::_M_add_root_dir)
(path::_M_add_filename): Remove.
(path::_M_type()): New member function to replace _M_type data member.
(path::_List): Define new struct type instead of using std::vector.
(path::_Cmpt::_Cmpt(string_type, _Type, size_t)): Change type of
first parameter to basic_string_view<value_type>.
(path::operator+=(const path&)): Do not define inline.
(path::operator+=(const string_type&)): Call _M_concat.
(path::operator+=(const value_type*)): Likewise.
(path::operator+=(value_type)): Likewise.
(path::operator+=(basic_string_view<value_type>)): Likewise.
(path::operator/=(const path&)): Do not define inline.
(path::_M_append(path)): Remove.
* python/libstdcxx/v6/printers.py (StdPathPrinter): New printer that
understands the new path::_List type.
* src/filesystem/std-path.cc (is_dir_sep): New function to replace
path::_S_is_dir_sep.
(path::_Parser): New helper class to parse strings as paths.
(path::_List::_Impl): Define container type for path components.
(path::_List): Define members.
(path::operator=(const path&)): Define explicitly, to provide the
strong exception safety guarantee.
(path::operator/=(const path&)): Implement manually by processing
each component of the argument, rather than using _M_split_cmpts
to parse the entire string again.
(path::_M_append(string_type)): Likewise.
(path::operator+=(const path&)): Likewise.
(path::_M_concat(string_type)): Likewise.
(path::remove_filename()): Perform trim directly instead of calling
_M_trim().
(path::_M_split_cmpts()): Rewrite in terms of _Parser class.
(path::_M_trim, path::_M_add_root_name, path::_M_add_root_dir)
(path::_M_add_filename): Remove.
* testsuite/27_io/filesystem/path/append/source.cc: Test appending a
string view that aliases the path.
testsuite/27_io/filesystem/path/concat/strings.cc: Test concatenating
a string view that aliases the path.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/fs_path.h
trunk/libstdc++-v3/python/libstdcxx/v6/printers.py
trunk/libstdc++-v3/src/filesystem/std-path.cc
trunk/libstdc++-v3/testsuite/27_io/filesystem/path/append/source.cc
trunk/libstdc++-v3/testsuite/27_io/filesystem/path/concat/strings.cc
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/71044] Optimize std::filesystem implementation
Date: Thu, 13 Dec 2018 20:41:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #0)
> Before the code is moved from std::experimental::filesystem to
> std::filesystem (and into the shared library) there are a few improvements
> that should be made.
>
> http://wg21.link/lwg2674 relaxes requirements on path::iterator so that a
> path is no longer required to embed a container of paths. The components
> could be stored as string_view objects, and only converted to path objects
> as needed (generally that means when a path::iterator is dereferenced).
I've decided against this. The current implementation avoid the need for
synchronization to make sure lazy init doesn't have data races, and avoids
lifetime problems due to paths being stashed in the iterators e.g.
filesystem::path p = "foo/bar";
basic_string_view s = std::next(p->begin())->native();
This creates a dangling string view if the path "bar" and its native string
only have the lifetime of the iterator.
> Parsing and splitting a path into components could be done lazily, so that
> it isn't done for intermediate temporary copies of a path, only the final
> value that is manipulated. Move semantics might mean this is unnecessary,
> since performance-sensitive code can usually move values instead of copying
> them.
Parsing and copying paths is now much faster (but still performs a lot of
allocations).
> Directory iterators currently construct a path object on every increment.
> This means that incrementing a directory iterator five times then
> dereferencing it constructs five paths which are never used (and each one is
> eagerly split into components, allocating a container of paths!).
> Construction of the path could be postponed so that it's only done on
> dereference, so that the five increments are cheap. This has thread-safety
> consequences, as the dereference is a const operation and could be performed
> concurrently, so the lazy construction of the path needs to be synchronized.
This has not been done.
(In reply to Jonathan Wakely from comment #2)
> Created attachment 38463 [details]
> Add assertions to directory iterator functions
>
> Also consider replacing non-inline functions such as
> directory_iterator::increment() with inline ones with assertions.
Maybe not necessary. Building with --enable-libstdcxx-debug and then linking to
$libdir/debug/libstdc++s.a gives a version of the library with assertions
enabled.
> This would allow those functions to check preconditions at runtime, and more
> functions could be noexcept.
(In reply to Jonathan Wakely from comment #3)
> Several member functions of path construct a path from their argument, but
> could be done without any allocations, e.g. path::compare(string_view)
This has not been done, but would be trivial with the new path::_Parser helper
type, which splits a string into components with no allocations, so that each
component could be compared to [this->begin(),this->end()).
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88477] Variable with type completed in initializer not allowed.
Date: Thu, 13 Dec 2018 20:41:00 -0000
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--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I'm referring to C17 6.7.9#3, in the constraints for initializers.
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88467] Silently accepts wrong array constructor
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
--- Comment #5 from kargl at gcc dot gnu.org ---
(In reply to kargl from comment #4)
> (In reply to kargl from comment #3)
> > See pr88116 for a description of what appears to be happening.
>
> So, in array.c (gfc_match_array_constructor), we have this
> bit of code
>
>
> /* Walk the constructor and ensure type conversion for numeric types.
> */
> if (gfc_numeric_ts (&ts))
> {
> c = gfc_constructor_first (head);
> for (; c; c = gfc_constructor_next (c))
> gfc_convert_type (c->expr, &ts, 1);
> }
>
> For a failing example of "[integer :: 1, [integer(8) :: '3', 4]]",
> ts is integer. The first constructor element is 1 and it has
> an EXPR_CONSTANT type and integer type. The next constructor has
> EXPR_ARRAY and the type for the array is integer(8). A conversion
> is applied to array. What I haven't determined yet is why
> gfc_match_array_constructor is called recursively or does reach
> the walk.
Well, that was a fun debugging session. In fact, gfortran does
queue an error message, but issuing the error does not occur
because of an idiotic error caused by the person who wrote the
above code. I'll have a patch ready shortly.
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Subject: [Bug fortran/85544] [7/8/9 Regression] ICE in gfc_conv_scalarized_array_ref, at fortran/trans-array.c:3385
Date: Thu, 13 Dec 2018 20:44:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |tkoenig at gcc dot gnu.org
--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Index: frontend-passes.c
===================================================================
--- frontend-passes.c (Revision 266251)
+++ frontend-passes.c (Arbeitskopie)
@@ -1880,15 +1880,14 @@ optimize_power (gfc_expr *e)
if (op1 == NULL || op1->expr_type != EXPR_CONSTANT)
return false;
+ op2 = e->value.op.op2;
+ if (op2 == NULL || op2->rank > 0)
+ return false;
+
if (mpz_cmp_si (op1->value.integer, -1L) == 0)
{
gfc_free_expr (op1);
- op2 = e->value.op.op2;
-
- if (op2 == NULL)
- return false;
-
iand = gfc_build_intrinsic_call (current_ns, GFC_ISYM_IAND,
"_internal_iand", e->where, 2, op2,
gfc_get_int_expr (e->ts.kind,
@@ -1908,10 +1907,6 @@ optimize_power (gfc_expr *e)
{
gfc_free_expr (op1);
- op2 = e->value.op.op2;
- if (op2 == NULL)
- return false;
-
ishft = gfc_build_intrinsic_call (current_ns, GFC_ISYM_ISHFT,
"_internal_ishft", e->where, 2,
gfc_get_int_expr (e->ts.kind,
@@ -1923,10 +1918,6 @@ optimize_power (gfc_expr *e)
else if (mpz_cmp_si (op1->value.integer, 1L) == 0)
{
- op2 = e->value.op.op2;
- if (op2 == NULL)
- return false;
-
gfc_free_expr (op1);
gfc_free_expr (op2);
>From gcc-bugs-return-625852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 20:49:16 2018
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Subject: [Bug c++/88216] [9 Regression] ICE (-std=c++2a) in cxx_eval_constant_expression, at cp/constexpr.c:4602
Date: Thu, 13 Dec 2018 20:48:00 -0000
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu Dec 13 20:47:32 2018
New Revision: 267108
URL: https://gcc.gnu.org/viewcvs?rev=267108&root=gcc&view=rev
Log:
PR c++/88216 - ICE with class type in non-type template parameter.
* mangle.c (write_expression): Handle TARGET_EXPR and
VIEW_CONVERT_EXPR.
* pt.c (convert_nontype_argument): Don't call
get_template_parm_object for value-dependent expressions.
* g++.dg/cpp2a/nontype-class9.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp2a/nontype-class9.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/mangle.c
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-625853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 20:49:35 2018
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Subject: [Bug c++/88216] [9 Regression] ICE (-std=c++2a) in cxx_eval_constant_expression, at cp/constexpr.c:4602
Date: Thu, 13 Dec 2018 20:49:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Should be fixed.
>From gcc-bugs-return-625854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 20:52:05 2018
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/88479] sanitizer should provide an option to detect conversion to signed integer that overflows
Date: Thu, 13 Dec 2018 20:52:00 -0000
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--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Thu, 13 Dec 2018, vincent-gcc at vinc17 dot net wrote:
> The C standard would have to drop ones' complement and sign-magnitude first.
And there's substantial support for doing so.
> In any case, this is not a good programming practice, and for some projects, it
If you want to do modulo arithmetic on signed values, the idiom (in
common-usage C which supports conversions to signed integer types as being
modulo) is to convert to unsigned, do arithmetic on unsigned and convert
back to signed. I don't think that's a bad practice. (Unintentional
overflows on conversion to signed would be bad, but the problem is
determining what's intentional.)
>From gcc-bugs-return-625855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 20:55:04 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88414] [9 Regression] ICE in lra_assign, at lra-assigns.c:1624
Date: Thu, 13 Dec 2018 20:55:00 -0000
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--- Comment #5 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Thu Dec 13 20:54:27 2018
New Revision: 267109
URL: https://gcc.gnu.org/viewcvs?rev=267109&root=gcc&view=rev
Log:
2018-12-13 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/88414
* lra-int.h (lra_asm_error_p): New.
* lra-assigns.c (lra_assign): Check lra_asm_error_p for checking
call crossed pseudo assignment correctness.
(lra_split_hard_reg_for): Set up lra_asm_error_p.
* lra-constraints.c (curr_insn_transform): Ditto.
* lra.c (lra_asm_error_p): New.
(lra): Reset lra_asm_error_p.
2018-12-13 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/88414
* gcc.target/i386/pr88414.c: New.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr88414.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lra-assigns.c
trunk/gcc/lra-constraints.c
trunk/gcc/lra-int.h
trunk/gcc/lra.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-625856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 22:19:11 2018
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Subject: [Bug d/88462] All D execution tests FAIL on Solaris/SPARC
Date: Thu, 13 Dec 2018 22:19:00 -0000
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--- Comment #6 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #5)
>
> Unfortunately, this doesn't work: the first time through, _locks[0] was
> already 8-byte aligned and everything worked fine. This remained when
> using align(8) instead. However, Mutex is 44 bytes on 32-bit
> Solaris/x86, so again _locks[1] lands on a non-8 byte boundary and
> pthread_mutex_init fails.
>
Oh, yeah. I didn't consider that size of Mutex would be a problem.
> I tried rouding up the size of the _locks array members to a multiple of
> 8, but that let the constructor already fail the first time through
> where _d_arraycopy checks that the right amount of data is copied:
>
> _d_arraycopy -> rt.util.array.enforceRawArraysConformable ->
> rt.util.array._enforceSameLength
What you're doing rounding up the array size is correct. The bit you're
missing is fixing up the slice assignment as well.
lock[0 .. __traits(classInstanceSize, Mutex)] = typeid(Mutex).initializer[];
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88414] [9 Regression] ICE in lra_assign, at lra-assigns.c:1624
Date: Thu, 13 Dec 2018 22:49:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |law at redhat dot com
Resolution|--- |FIXED
--- Comment #6 from Jeffrey A. Law <law at redhat dot com> ---
Resolved on the trunk.
>From gcc-bugs-return-625858-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 22:51:13 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88311] [9 Regression] mlongcall indirections are optimised away (for binutils versions that don't support AS_PLTSEQ)
Date: Thu, 13 Dec 2018 22:51:00 -0000
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Alan Modra <amodra at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |amodra at gmail dot com
--- Comment #6 from Alan Modra <amodra at gmail dot com> ---
I can reproduce the problem with current gcc and auto-host.h edited to undef
HAVE_AS_PLTSEQ. Investigating.
>From gcc-bugs-return-625859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 22:52:03 2018
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From: "amodra at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88311] [9 Regression] mlongcall indirections are optimised away (for binutils versions that don't support AS_PLTSEQ)
Date: Thu, 13 Dec 2018 22:52:00 -0000
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Alan Modra <amodra at gmail dot com> changed:
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CC|amodra at gcc dot gnu.org, |
|amodra at gmail dot com |
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug demangler/87241] A hang problem for c++filt
Date: Thu, 13 Dec 2018 22:53:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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Component|c++ |demangler
--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
changing component to demangler
>From gcc-bugs-return-625861-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 22:54:06 2018
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Subject: [Bug rtl-optimization/88470] [7/8/9 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2354
Date: Thu, 13 Dec 2018 22:54:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #6 from Jeffrey A. Law <law at redhat dot com> ---
Note we've got 8 obvious bugs in BZ where we're ICE-ing in
maybe_record_trace_start, 3 of which are marked as gcc-9 regressions. It's
probably worth reviewing all of them to see if any others are fixed by your
change.
>From gcc-bugs-return-625862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 23:02:03 2018
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Subject: [Bug rtl-optimization/88311] [9 Regression] mlongcall indirections are optimised away (for binutils versions that don't support AS_PLTSEQ)
Date: Thu, 13 Dec 2018 23:02:00 -0000
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--- Comment #7 from Alan Modra <amodra at gmail dot com> ---
Hmm, it looks like combine is removing the long call.
hello2.c.262r.ud_dce:
(insn 10 9 11 2 (set (reg/f:SI 127)
(high:SI (symbol_ref:SI ("printf") [flags 0x41] <function_decl
0x7f18d32a5e00 printf>))) "hello2.c":5:3 651 {elf_high}
(nil))
(insn 11 10 12 2 (set (reg/f:SI 126)
(lo_sum:SI (reg/f:SI 127)
(symbol_ref:SI ("printf") [flags 0x41] <function_decl
0x7f18d32a5e00 printf>))) "hello2.c":5:3 652 {elf_low}
(expr_list:REG_DEAD (reg/f:SI 127)
(expr_list:REG_EQUAL (symbol_ref:SI ("printf") [flags 0x41]
<function_decl 0x7f18d32a5e00 printf>)
(nil))))
(insn 12 11 13 2 (set (reg:SI 66 ctr)
(reg/f:SI 126)) "hello2.c":5:3 491 {*movsi_internal1}
(expr_list:REG_DEAD (reg/f:SI 126)
(expr_list:REG_EQUAL (symbol_ref:SI ("printf") [flags 0x41]
<function_decl 0x7f18d32a5e00 printf>)
(nil))))
(call_insn 13 12 18 2 (parallel [
(set (reg:SI 3 3)
(call (mem:SI (reg:SI 66 ctr) [0 __builtin_printf S4 A8])
(const_int 0 [0])))
(use (const_int 4 [0x4]))
(clobber (reg:SI 65 lr))
]) "hello2.c":5:3 658 {*call_value_indirect_nonlocal_sysvsi}
(expr_list:REG_DEAD (reg:SI 66 ctr)
(expr_list:REG_UNUSED (reg:SI 3 3)
(expr_list:REG_CALL_DECL (symbol_ref:SI ("printf") [flags 0x41]
<function_decl 0x7f18d32a5e00 printf>)
(nil))))
(expr_list:SI (use (reg:SI 3 3))
(nil)))
hello2.c.263r.combine:
(note 10 9 11 2 NOTE_INSN_DELETED)
(note 11 10 12 2 NOTE_INSN_DELETED)
(note 12 11 13 2 NOTE_INSN_DELETED)
(call_insn 13 12 18 2 (parallel [
(set (reg:SI 3 3)
(call (mem:SI (symbol_ref:SI ("printf") [flags 0x41]
<function_decl 0x7f18d32a5e00 printf>) [0 __builtin_printf S4 A8])
(const_int 0 [0])))
(use (const_int 4 [0x4]))
(clobber (reg:SI 65 lr))
]) "hello2.c":5:3 659 {*call_value_nonlocal_sysvsi}
(expr_list:REG_CALL_DECL (symbol_ref:SI ("printf") [flags 0x41]
<function_decl 0x7f18d32a5e00 printf>)
(expr_list:REG_UNUSED (reg:SI 3 3)
(nil)))
(expr_list:SI (use (reg:SI 3 3))
(nil)))
>From gcc-bugs-return-625863-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 23:19:49 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 d/88462] All D execution tests FAIL on Solaris/SPARC
Date: Thu, 13 Dec 2018 23:19:00 -0000
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--- Comment #7 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #6 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
>> 8, but that let the constructor already fail the first time through
>> where _d_arraycopy checks that the right amount of data is copied:
>>
>> _d_arraycopy -> rt.util.array.enforceRawArraysConformable ->
>> rt.util.array._enforceSameLength
>
> What you're doing rounding up the array size is correct. The bit you're
> missing is fixing up the slice assignment as well.
>
> lock[0 .. __traits(classInstanceSize, Mutex)] = typeid(Mutex).initializer[];
That got me over this issue indeed, thanks.
However, I now hit the next issue: a SIGBUS (which gdb incorrectly
reports as SIGSEGV) due to an alignement issue:
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0x0007c970 in object.ModuleInfo.flags() const (this=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1541
1541 @property uint flags() nothrow pure @nogc { return _flags; }
(gdb) where
#0 0x0007c970 in object.ModuleInfo.flags() const (this=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1541
#1 0x0007d118 in object.ModuleInfo.importedModules() const (this=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1580
#2 0x0008ed74 in rt.minfo.ModuleGroup.sortCtors(immutable(char)[]) (this=...,
cycleHandling=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:259
#3 0x00091110 in rt.minfo.ModuleGroup.sortCtors() (this=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:533
#4 0x00092d24 in __foreachbody1 (this=0x0, sg=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:795
#5 0x00097a08 in rt.sections_elf_shared.DSO.opApply(scope int(ref
rt.sections_elf_shared.DSO) delegate) (dg=...)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/sections_elf_shared.d:68
#6 0x00092ce8 in rt_moduleCtor ()
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:793
#7 0x00085dbc in rt_init ()
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:190
#8 0x000867e8 in runAll (this=0xffbfe78c)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:485
#9 0x00086740 in tryExec (this=0xffbfe78c, dg=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:461
#10 0x0008664c in _d_run_main (argc=1, argv=0xffbfe8bc,
mainFunc=0x6c164 <D main>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:494
#11 0x0006b7e4 in main (argc=1, argv=0xffbfe8bc)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/__entrypoint.di:44
#12 0x0006b5d4 in _start ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) p this
$5 = (const object.ModuleInfo &) @0x12ab33: {_flags = 4100, _index = 0}
(gdb) x/i $pc
=> 0x7c970 <_D6object10ModuleInfo5flagsMxFNaNbNdNiZk+152>:
ld [ %g1 ], %g1
(gdb) p/x $g1
$6 = 0x12ab33
Trying to load 32 bits from a non-4 byte aligned pointer is a no-no on a
strict-alignment target like sparc...
>From gcc-bugs-return-625864-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 23:32:02 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/88462] All D execution tests FAIL on Solaris/SPARC
Date: Thu, 13 Dec 2018 23:32:00 -0000
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--- Comment #8 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #7)
> > --- Comment #6 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
> >> 8, but that let the constructor already fail the first time through
> >> where _d_arraycopy checks that the right amount of data is copied:
> >>
> >> _d_arraycopy -> rt.util.array.enforceRawArraysConformable ->
> >> rt.util.array._enforceSameLength
> >
> > What you're doing rounding up the array size is correct. The bit you're
> > missing is fixing up the slice assignment as well.
> >
> > lock[0 .. __traits(classInstanceSize, Mutex)] = typeid(Mutex).initializer[];
>
> That got me over this issue indeed, thanks.
>
> However, I now hit the next issue: a SIGBUS (which gdb incorrectly
> reports as SIGSEGV) due to an alignement issue:
>
> Thread 2 received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 1 (LWP 1)]
> 0x0007c970 in object.ModuleInfo.flags() const (this=...)
> at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1541
> 1541 @property uint flags() nothrow pure @nogc { return _flags; }
> (gdb) where
> #0 0x0007c970 in object.ModuleInfo.flags() const (this=...)
> at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1541
> #1 0x0007d118 in object.ModuleInfo.importedModules() const (this=...)
> at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1580
> #2 0x0008ed74 in rt.minfo.ModuleGroup.sortCtors(immutable(char)[])
> (this=...,
> cycleHandling=...)
> at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:259
> #3 0x00091110 in rt.minfo.ModuleGroup.sortCtors() (this=...)
> at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:533
> #4 0x00092d24 in __foreachbody1 (this=0x0, sg=...)
> at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:795
> #5 0x00097a08 in rt.sections_elf_shared.DSO.opApply(scope int(ref
> rt.sections_elf_shared.DSO) delegate) (dg=...)
> at
> /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/sections_elf_shared.d:
> 68
> #6 0x00092ce8 in rt_moduleCtor ()
> at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:793
> #7 0x00085dbc in rt_init ()
> at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:190
> #8 0x000867e8 in runAll (this=0xffbfe78c)
> at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:485
> #9 0x00086740 in tryExec (this=0xffbfe78c, dg=...)
> at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:461
> #10 0x0008664c in _d_run_main (argc=1, argv=0xffbfe8bc,
> mainFunc=0x6c164 <D main>)
> at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:494
> #11 0x0006b7e4 in main (argc=1, argv=0xffbfe8bc)
> at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/__entrypoint.di:44
> #12 0x0006b5d4 in _start ()
> Backtrace stopped: previous frame identical to this frame (corrupt stack?)
> (gdb) p this
> $5 = (const object.ModuleInfo &) @0x12ab33: {_flags = 4100, _index = 0}
> (gdb) x/i $pc
> => 0x7c970 <_D6object10ModuleInfo5flagsMxFNaNbNdNiZk+152>:
> ld [ %g1 ], %g1
> (gdb) p/x $g1
> $6 = 0x12ab33
>
> Trying to load 32 bits from a non-4 byte aligned pointer is a no-no on a
> strict-alignment target like sparc...
I saw that on HPPA as well when testing under QEMU.
ModuleInfo is a variably-sized packed struct - what is in the variable part is
determined by the value of _flags.
This is compiler generated, so I'll have a look into giving it proper alignment
on the compiler side.
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Subject: [Bug rtl-optimization/88470] [7/8/9 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2354
Date: Thu, 13 Dec 2018 23:34:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Dec 13 23:33:57 2018
New Revision: 267112
URL: https://gcc.gnu.org/viewcvs?rev=267112&root=gcc&view=rev
Log:
PR rtl-optimization/88470
* cfgcleanup.c (outgoing_edges_match): If the function is
shrink-wrapped and bb1 ends with a JUMP_INSN with a single fake
edge to EXIT, return false.
* gcc.target/i386/pr88470.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr88470.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfgcleanup.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/88444] [9 Regression] ICE: tree check: expected ssa_name, have integer_cst in live_on_edge, at tree-vrp.c:468; or ICE: tree check: expected ssa_name, have integer_cst in get_value_range, at vr-values.c:84
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Dec 13 23:35:10 2018
New Revision: 267113
URL: https://gcc.gnu.org/viewcvs?rev=267113&root=gcc&view=rev
Log:
PR tree-optimization/88444
* tree-inline.c (fold_marked_statements): Iterate up to
last_basic_block_for_fn rather than n_basic_blocks_for_fn.
* gcc.dg/tree-ssa/pr88444.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr88444.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-inline.c
>From gcc-bugs-return-625867-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Dec 13 23:40:56 2018
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Subject: [Bug tree-optimization/88444] [9 Regression] ICE: tree check: expected ssa_name, have integer_cst in live_on_edge, at tree-vrp.c:468; or ICE: tree check: expected ssa_name, have integer_cst in get_value_range, at vr-values.c:84
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug rtl-optimization/88470] [7/8 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2354
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 Regression] ICE in |[7/8 Regression] ICE in
|maybe_record_trace_start, |maybe_record_trace_start,
|at dwarf2cfi.c:2354 |at dwarf2cfi.c:2354
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-625869-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 00:02:01 2018
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Subject: [Bug sanitizer/88479] sanitizer should provide an option to detect conversion to signed integer that overflows
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--- Comment #5 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to joseph@codesourcery.com from comment #4)
> If you want to do modulo arithmetic on signed values, the idiom (in
> common-usage C which supports conversions to signed integer types as being
> modulo) is to convert to unsigned, do arithmetic on unsigned and convert
> back to signed.
The conversion back to signed can be done without involving the
implementation-defined behavior, e.g. with a macro that consider the two cases.
This is much better as the conversion is explicit.
>From gcc-bugs-return-625870-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 00:12:11 2018
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Subject: [Bug rtl-optimization/88311] [9 Regression] mlongcall indirections are optimised away (for binutils versions that don't support AS_PLTSEQ)
Date: Fri, 14 Dec 2018 00:12:00 -0000
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--- Comment #8 from Iain Sandoe <iains at gcc dot gnu.org> ---
I don't profess to grok the intracecies of combine, but ISTM that the stored
indirection needs the moral equivalent of "used", or else it should surely be a
candidate for removal. After all, that's a useful optimisation in other cases.
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Subject: [Bug rtl-optimization/88311] [9 Regression] mlongcall indirections are optimised away (for binutils versions that don't support AS_PLTSEQ)
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--- Comment #9 from Alan Modra <amodra at gmail dot com> ---
Created attachment 45235
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45235&action=edit
fix
r266604, git 0a4b5c66df9, "[RS6000] Use standard call patterns for
__tls_get_addr calls" is the patch that regressed the long calls. The uploaded
patch has been regression tested powerpc64le-linux with HAVE_AS_PLTCALL set.
I'm waiting on the results of a powerpc64-linux biarch bootstrap with
HAVE_AS_PLTCALL undefined.
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Subject: [Bug c++/87292] Warnings with Bit Fields
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=39170
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
Besides bug 61414 this bug also reminds me of bug 39170
>From gcc-bugs-return-625873-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 05:12:37 2018
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88261] [9 Regression] ICE: verify_gimple failed (error: non-trivial conversion at assignment)
Date: Fri, 14 Dec 2018 05:12:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #5 from Jeffrey A. Law <law at redhat dot com> ---
Right, but we're not supposed to ICE, even on invalid code.
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From: "jiangning.liu at amperecomputing dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88492] New: SLP optimization generates ugly code
Date: Fri, 14 Dec 2018 05:17:00 -0000
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Bug ID: 88492
Summary: SLP optimization generates ugly code
Product: gcc
Version: 9.0
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For aarch64, SLP optimization generates ugly code for the case below,
int test_slp( unsigned char *b )
{
unsigned int tmp[4][4];
int sum = 0;
for( int i = 0; i < 4; i++, b += 4 )
{
tmp[i][0] = b[0];
tmp[i][2] = b[1];
tmp[i][1] = b[2];
tmp[i][3] = b[3];
}
for( int i = 0; i < 4; i++ )
{
sum += tmp[0][i] + tmp[1][i] + tmp[2][i] + tmp[3][i];
}
return sum;
}
With command line "gcc -O3", the following code is generated,
0000000000000000 <test_slp>:
0: 90000001 adrp x1, 0 <test_slp>
4: d10103ff sub sp, sp, #0x40
8: 3dc00001 ldr q1, [x0]
c: 3dc00020 ldr q0, [x1]
10: 4e000021 tbl v1.16b, {v1.16b}, v0.16b
14: 2f08a422 uxtl v2.8h, v1.8b
18: 6f08a421 uxtl2 v1.8h, v1.16b
1c: 2f10a443 uxtl v3.4s, v2.4h
20: 6f10a442 uxtl2 v2.4s, v2.8h
24: 2f10a420 uxtl v0.4s, v1.4h
28: 6f10a421 uxtl2 v1.4s, v1.8h
2c: 9e660060 fmov x0, d3
30: ad000be3 stp q3, q2, [sp]
34: b9401be8 ldr w8, [sp, #24]
38: ad0107e0 stp q0, q1, [sp, #32]
3c: 9e660022 fmov x2, d1
40: d360fc01 lsr x1, x0, #32
44: 9e660040 fmov x0, d2
48: 294117e6 ldp w6, w5, [sp, #8]
4c: d360fc43 lsr x3, x2, #32
50: b9402be2 ldr w2, [sp, #40]
54: d360fc07 lsr x7, x0, #32
58: 9e660000 fmov x0, d0
5c: 0ea18400 add v0.2s, v0.2s, v1.2s
60: 0b0100e7 add w7, w7, w1
64: 0b0800c6 add w6, w6, w8
68: b9401fe8 ldr w8, [sp, #28]
6c: d360fc00 lsr x0, x0, #32
70: 1e260001 fmov w1, s0
74: 0ea28460 add v0.2s, v3.2s, v2.2s
78: 0b000063 add w3, w3, w0
7c: 0b070063 add w3, w3, w7
80: 29471fe0 ldp w0, w7, [sp, #56]
84: 1e260004 fmov w4, s0
88: 0b000042 add w2, w2, w0
8c: b9402fe0 ldr w0, [sp, #44]
90: 0b060042 add w2, w2, w6
94: 0b040021 add w1, w1, w4
98: 0b070000 add w0, w0, w7
9c: 0b030021 add w1, w1, w3
a0: 0b0800a3 add w3, w5, w8
a4: 0b020021 add w1, w1, w2
a8: 0b030000 add w0, w0, w3
ac: 0b000020 add w0, w1, w0
b0: 910103ff add sp, sp, #0x40
b4: d65f03c0 ret
In the code, vectorization code is generated, but there are ugly instructions
generated as well, e.g. memory store and register copy from SIMD register to
general purpose register.
With command line "gcc -O3 -fno-tree-slp-vectorize", the following code can be
generated, and it looks pretty clean. Usually, this code sequence is friendly
to hardware prefetch.
0000000000000000 <test_slp>:
0: 39402004 ldrb w4, [x0, #8]
4: 39401002 ldrb w2, [x0, #4]
8: 39403001 ldrb w1, [x0, #12]
c: 39400003 ldrb w3, [x0]
10: 39402806 ldrb w6, [x0, #10]
14: 0b040021 add w1, w1, w4
18: 39401805 ldrb w5, [x0, #6]
1c: 0b020063 add w3, w3, w2
20: 39403804 ldrb w4, [x0, #14]
24: 0b030021 add w1, w1, w3
28: 39400802 ldrb w2, [x0, #2]
2c: 39400403 ldrb w3, [x0, #1]
30: 0b060084 add w4, w4, w6
34: 39402407 ldrb w7, [x0, #9]
38: 0b050042 add w2, w2, w5
3c: 39401406 ldrb w6, [x0, #5]
40: 0b020084 add w4, w4, w2
44: 39403405 ldrb w5, [x0, #13]
48: 0b040021 add w1, w1, w4
4c: 0b060063 add w3, w3, w6
50: 39400c02 ldrb w2, [x0, #3]
54: 0b0700a5 add w5, w5, w7
58: 39403c04 ldrb w4, [x0, #15]
5c: 0b050063 add w3, w3, w5
60: 39401c06 ldrb w6, [x0, #7]
64: 39402c05 ldrb w5, [x0, #11]
68: 0b030021 add w1, w1, w3
6c: 0b060040 add w0, w2, w6
70: 0b050082 add w2, w4, w5
74: 0b020000 add w0, w0, w2
78: 0b000020 add w0, w1, w0
7c: d65f03c0 ret
Anyway, it looks the heuristic rule to enable SLP optimization needs to be
improved.
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Subject: [Bug fortran/88399] program segmentation faults when out-of-memory
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Lukas Schork <schorkl72 at gmail dot com> changed:
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--- Comment #3 from Lukas Schork <schorkl72 at gmail dot com> ---
Tested with 8.2.0, where it works correctly.
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
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--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Fri Dec 14 08:29:34 2018
New Revision: 267122
URL: https://gcc.gnu.org/viewcvs?rev=267122&root=gcc&view=rev
Log:
match_asm_constraints: Use copy_rtx where needed (PR88001)
The new insn here (temporarily) illegally shares RTL. This fixes it.
PR rtl-optimization/88001
* function.c (match_asm_constraints_1): Don't invalidly share RTL.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/function.c
>From gcc-bugs-return-625877-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 08:41:52 2018
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Subject: [Bug tree-optimization/88280] missing folding of logical and bitwise AND
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Confirmed. g and h end up like this before RTL expansion (initial folding
> produces this):
>
> j_6 = i_4(D) & a_5(D);
> _1 = i_4(D) != 0;
> _2 = j_6 != 0;
> _3 = _1 & _2;
> _7 = (int) _3;
> return _7;
>
> and for e we do not combine the i != 0 check.
>
> <bb 2> [local count: 1073741824]:
> if (i_3(D) != 0)
> goto <bb 3>; [50.00%]
> else
> goto <bb 4>; [50.00%]
>
> <bb 3> [local count: 536870913]:
> _1 = i_3(D) & a_4(D);
> _6 = _1 != 0;
> _7 = (int) _6;
>
> <bb 4> [local count: 1073741824]:
> # iftmp.0_2 = PHI <_7(3), i_3(D)(2)>
> return iftmp.0_2;
Yeah, with f we are just lucky that (i & a) != 0 test is in a different basic
block and dominates the i != 0 test; EVRP then adds assertions from that (i &
a) != 0 that i != 0 as well as a != 0 and optimizes the second redundant check
out.
For g and h we could in theory handle that through some match.pd pattern, but
dunno if it wouldn't be way too much specialized.
If we wanted to do something about e, it would need to be done in reassoc range
handling, but again, not really sure how often it would trigger on real-world
code.
>From gcc-bugs-return-625878-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 08:49:42 2018
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Subject: [Bug target/65496] ICE: in maybe_record_trace_start, at dwarf2cfi.c:2318 with -O3 -fsched2-use-superblocks -mavx512dq --param=max-pending-list-length=0
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
#c0 got fixed or made latent with r235905.
The #c4 testcase went latent with r249450 (though no idea why it hasn't been
filed separately).
In any case, not sure if it is worth keeping this open when it is either latent
or fixed on the trunk.
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Subject: [Bug testsuite/88454] [9 regression] test case gcc.dg/tree-ssa/split-path-5.c fails after r266971
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-625880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 08:51:42 2018
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From: "heinrich.seebauer at swistec dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/88481] -O1 causes optimizer to drop 'then' clause in conditional
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Heinrich Seebauer <heinrich.seebauer at swistec dot de> changed:
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--- Comment #10 from Heinrich Seebauer <heinrich.seebauer at swistec dot de> ---
Alexander, you are right, it is only strange behaviour. Using -O1 drops the
'then' clause, but the results are the same, if one takes a broader view.
The program deals with controlling schedules using actual time. Each test run
has different input values (current UTC time). I set up a situation where I was
able to control system time, and the outcomes were consistent, either using -O0
oe -O1.
What confused me was the fact that -O2/-Os did NOT drop the then clause. So -O2
ist not just optimizing the -O1 outcome, but different from the beginning of
the optimizer pass.
I apologize for not getting this point quickly.
Thank you very much for your support and your work for the commuinty,
kind regards
Heinrich
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Subject: [Bug rtl-optimization/88311] [9 Regression] mlongcall indirections are optimised away (for binutils versions that don't support AS_PLTSEQ)
Date: Fri, 14 Dec 2018 09:04:00 -0000
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--- Comment #10 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Fri Dec 14 09:03:50 2018
New Revision: 267123
URL: https://gcc.gnu.org/viewcvs?rev=267123&root=gcc&view=rev
Log:
[RS6000] PR88311, mlongcall indirections are optimised away
Masking CALL_LONG from the cookie was done in order to simplify and
correct length attribute calculations for indirect calls at one point
in my call series tidy when the indirect patterns used alternatives
"0,n" on the cookie operand. (Leaving the CALL_LONG in place
calculated the wrong length for long calls without fp args.)
This is no longer necessary now that the indirect sysv call patterns
explicitly test for the fp arg bits in their length attribute
expressions. And without the CALL_LONG to disable insns like
call_value_local_svsv, combine merrily replaces the indirect long call
sequence with a direct call. As it should. This patch reinstates
the CALL_LONG bit.
PR rtl-optimization/88311
* config/rs6000/rs6000.c (rs6000_call_sysv): Do not mask cookie.
(rs6000_sibcall_sysv): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
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Subject: [Bug target/88224] Wrong Cortex-R7 and Cortex-R8 FPU configuration
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--- Comment #3 from avieira at gcc dot gnu.org ---
Author: avieira
Date: Fri Dec 14 09:04:24 2018
New Revision: 267124
URL: https://gcc.gnu.org/viewcvs?rev=267124&root=gcc&view=rev
Log:
PR target/88224: Fix FPU configuration of Cortex-R7 and Cortex-R8
gcc/
2018-12-14 Andre Vieira <andre.simoesdiasvieira@arm.com>
Backport from mainline
PR target/88224
* config/arm/arm-cpus.in (armv7-r): Add FP16conv configurations.
(cortex-r7, cortex-r8): Update fpu and add new configuration.
* doc/invoke.texi (armv7-r): Add two new vfp options.
(nofp.dp): Add cortex-r7 and cortex-r8 to the list of targets that
support this option.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/arm/arm-cpus.in
branches/gcc-8-branch/gcc/doc/invoke.texi
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Subject: [Bug target/65496] ICE: in maybe_record_trace_start, at dwarf2cfi.c:2318 with -O3 -fsched2-use-superblocks -mavx512dq --param=max-pending-list-length=0
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--- Comment #7 from Zdenek Sojka <zsojka at seznam dot cz> ---
Please feel free to close this one; I might open another PR if I trigger this
ICE again.
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Subject: [Bug target/65496] ICE: in maybe_record_trace_start, at dwarf2cfi.c:2318 with -O3 -fsched2-use-superblocks -mavx512dq --param=max-pending-list-length=0
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
.
>From gcc-bugs-return-625885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 09:26:05 2018
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Subject: [Bug tree-optimization/88492] SLP optimization generates ugly code
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |aarch64
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-14
CC| |ktkachov at gcc dot gnu.org
Blocks| |53947
Ever confirmed|0 |1
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed. Don't know if the vectoriser can do anything better here, but we if
not the cost models should be disabling it.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
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Subject: [Bug d/88462] All D execution tests FAIL on Solaris/SPARC
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--- Comment #9 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #8 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
>> Trying to load 32 bits from a non-4 byte aligned pointer is a no-no on a
>> strict-alignment target like sparc...
>
> I saw that on HPPA as well when testing under QEMU.
>
> ModuleInfo is a variably-sized packed struct - what is in the variable part is
> determined by the value of _flags.
>
> This is compiler generated, so I'll have a look into giving it proper alignment
> on the compiler side.
An alternative might be to leave the on-disk representation as is and
only handle alignment on input/startup. However, that's probably a bad
tradeoff of some on-disk space savings vs. the runtime cost at every
startup.
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Subject: [Bug target/88013] can't vectorize rgb to grayscale conversion code
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
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--- Comment #8 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
> vshr.u16 q9, q9, #8
> vshr.u16 q8, q8, #8
> vmovn.i16 d20, q9
> vmovn.i16 d21, q8
Isn't that "just" a missing combine pattern to get us vshrn in both backends ?
Ramana
>From gcc-bugs-return-625888-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 09:43:45 2018
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Fri, 14 Dec 2018 09:43:00 -0000
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ramana at gcc dot gnu.org
--- Comment #6 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #5)
> The first one just needs an xfail. I don't know if it should be *-*-* there
> or only arm*-*-* should be added.
>
> The other two need some debugging by someone who knows the target and/or
> these tests.
for the addr-modes-float.c case there are additional vmov's being generated and
thus is certainly a regression.
--- 8.s 2018-12-14 09:41:04.367843079 +0000
+++ addr-modes-float.s 2018-12-14 09:40:39.907980812 +0000
@@ -139,10 +139,13 @@
@ args = 0, pretend = 0, frame = 0
@ frame_needed = 0, uses_anonymous_args = 0
@ link register save eliminated.
+ vmov q8, q0 @ ti
mov r3, r0
+ vmov q9, q1 @ ti
add r0, r0, #48
- vst3.8 {d0, d2, d4}, [r3]!
- vst3.8 {d1, d3, d5}, [r3]
+ vmov q10, q2 @ ti
+ vst3.8 {d16, d18, d20}, [r3]!
+ vst3.8 {d17, d19, d21}, [r3]
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-14
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--- Comment #7 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug testsuite/88491] new test case allocfail.sh in r267054 fails if dash is the default shell (/bin/sh)
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Fri Dec 14 09:43:41 2018
New Revision: 267127
URL: https://gcc.gnu.org/viewcvs?rev=267127&root=gcc&view=rev
Log:
[testsuite] Remove bashism from libbacktrace/allocfail.sh
Test-case libbacktrace/allocfail.sh contains bashism "set -o pipefail", which
makes the script fail on ubuntu 18.04, which links /bin/sh to /bin/dash.
Fix this by removing the "set -o pipefail".
Tested by running the test-case with dash on x86_64-linux.
2018-12-14 Tom de Vries <tdevries@suse.de>
PR testsuite/88491
* allocfail.sh: Remove "set -o pipefail".
Modified:
trunk/libbacktrace/ChangeLog
trunk/libbacktrace/allocfail.sh
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Subject: [Bug testsuite/88491] new test case allocfail.sh in r267054 fails if dash is the default shell (/bin/sh)
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |ian at airs dot com
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--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Patch fixing test-case committed, marking resolved-fixed.
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Subject: [Bug rtl-optimization/88311] [9 Regression] mlongcall indirections are optimised away (for binutils versions that don't support AS_PLTSEQ)
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Alan Modra <amodra at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #11 from Alan Modra <amodra at gmail dot com> ---
Fixed.
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Subject: [Bug c++/88493] New: Inconsistent error messages for unknown types
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Bug ID: 88493
Summary: Inconsistent error messages for unknown types
Product: gcc
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When compiling:
----8<----8<----8<----
struct Foo;
struct Bar
{
explicit Bar(Fooo* foo_) :
m_foo{foo_}
{
}
void Baz(Fooo* foo_);
Fooo* m_foo;
};
----8<----8<----8<----
Foo is forward declared, Fooo is not declared/defined, simulating a typo.
$ g++-8.2.1 -Wall -c 20181213-bad_type_name_diag.cpp
20181213-bad_type_name_diag.cpp:5:19: error: expected ‘)’ before ‘*’ token
explicit Bar(Fooo* foo_) :
~ ^
)
20181213-bad_type_name_diag.cpp:7:2: error: expected unqualified-id before ‘{’
token
{
^
20181213-bad_type_name_diag.cpp:10:11: error: ‘Fooo’ has not been declared
void Baz(Fooo* foo_);
^~~~
20181213-bad_type_name_diag.cpp:12:2: error: ‘Fooo’ does not name a type; did
you mean ‘Foo’?
Fooo* m_foo;
^~~~
Foo
The first error is not really helping, the second one is a cascade from that.
The third one is OK, but there is no suggestion. The fourth one is the most
useful.
For the three cases of Foo vs Fooo mismatch, three different error messages was
printed.
If I follow the suggestion of the first error msg, and put a ): after Fooo and
comment out the rest of the line:
$ g++-8.2.1 -Wall -c 20181213-bad_type_name_diag.cpp
20181213-bad_type_name_diag.cpp:5:19: error: function definition does not
declare parameters
explicit Bar(Fooo) : //* foo_) :
^
However, mentioning only the type of the parameter and not name it should be
accepted. Then, report an error because Fooo is unknown, possibly suggesting
Foo instead.
GCC 6/7/8/9 report the same errors, with minor formatting/coloring differences.
$ g++-8.2.1 -v
Using built-in specs.
COLLECT_GCC=g++-8.2.1
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/8.2.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure CC=gcc-8.2.1 CXX=g++-8.2.1
--enable-languages=c,c++ --disable-multilib --program-suffix=-8.2.1
--disable-bootstrap CFLAGS='-O2 -march=native -mtune=native' CXXFLAGS='-O2
-march=native -mtune=native'
Thread model: posix
gcc version 8.2.1 20181213 (GCC)
$ g++-9.0.0 -v
Using built-in specs.
COLLECT_GCC=g++-9.0.0
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure CC=gcc-8.2.1 CXX=g++-8.2.1
--enable-languages=c,c++ --disable-multilib --program-suffix=-9.0.0
--disable-bootstrap CFLAGS='-O2 -march=native -mtune=native' CXXFLAGS='-O2
-march=native -mtune=native'
Thread model: posix
gcc version 9.0.0 20181213 (experimental) (GCC)
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Subject: [Bug c++/88468] Arduino: 1.8.8 (Windows 10) internal compiler error , segmentation fault
Date: Fri, 14 Dec 2018 10:08:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |avr
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-12-14
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Please provide preprocessed source as a testcase. Note that GCC 5 is no longer
supported, please update to at least GCC 7.
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Subject: [Bug target/88469] [7/8/9 regression] AAPCS - Struct with 64-bit bitfield may be passed in wrong registers
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |ABI
Target Milestone|--- |7.5
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Subject: [Bug rtl-optimization/88253] Inlining of function incorrectly deletes volatile register access when using XOR in avr-gcc
Date: Fri, 14 Dec 2018 10:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88253
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|avr |avr-*-*
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-12-14
CC| |segher at gcc dot gnu.org
Host|Macos, Windows |
Assignee|unassigned at gcc dot gnu.org |segher at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Mine. I have a patch.
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Subject: [Bug target/88473] AVX512: constant folding on mask does not remove unnecessary instructions
Date: Fri, 14 Dec 2018 10:13:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |x86_64-*-*, i?86-*-*
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-625898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 10:16:11 2018
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Subject: [Bug rtl-optimization/88478] [9 Regression] valgrind error in cselib_record_sets
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c++ |rtl-optimization
Version|8.0 |9.0
Target Milestone|--- |9.0
Summary|valgrind error in |[9 Regression] valgrind
|cselib_record_sets |error in
| |cselib_record_sets
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Subject: [Bug target/88489] [9 Regression] FAIL: gcc.target/i386/avx512f-vfixupimmss-2.c execution test
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Can't reproduce, the test passes for me just fine on i9-7960X.
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Subject: [Bug rtl-optimization/88478] [9 Regression] valgrind error in cselib_record_sets
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David Binderman <dcb314 at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aoliva at gcc dot gnu.org
--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
svn blame says
266873 aoliva && sets[i].src_elt
Revision number is in the correct range, so adding to
distribution list.
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Subject: [Bug middle-end/88487] union prevents autovectorization
Date: Fri, 14 Dec 2018 10:31:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-12-14
Blocks| |49774
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
t.c:22:1: note: can't determine dependence between MEM[(double *)_28 clique 1
base 0] and MEM[(double *)_25 + 8B clique 1 base 0]
t.c:22:1: note: removing SLP instance operations starting from: MEM[(double
*)_28 clique 1 base 0] = _29;
t.c:22:1: note: can't determine dependence between MEM[(double *)_43 clique 1
base 0] and MEM[(double *)_40 + 8B clique 1 base 0]
t.c:22:1: note: removing SLP instance operations starting from: MEM[(double
*)_43 clique 1 base 0] = _44;
# PT = nonlocal escaped null
_25 = MEM[(double * restrict *)_21 clique 1 base 0];
# PT = nonlocal escaped null
_28 = MEM[(double * restrict *)_26 clique 1 base 0];
..
MEM[(double *)_28 clique 1 base 0] = _29;
_31 = MEM[(double *)_25 + 8B clique 1 base 0];
while w/o unions we have
# PT = null { D.2686 } (nonlocal, restrict)
_25 = MEM[(double * restrict *)_21 clique 1 base 1];
..
_29 = MEM[(double *)_25 clique 1 base 2];
that is, the indirect loads from non-union members produce restricted
pointers while those from union members not.
The reason for this is that points-to analysis doesn't handle unions
in field-sensitive analysis and thus the restrict code doesn't apply.
This can probably be fixed in a reasonable manner in
push_fields_onto_fieldstack
by initializing only_restrict_pointers appropriately for the UNION case.
Not really my top-priority though.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49774
[Bug 49774] [meta-bug] restrict qualification aliasing issues
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Subject: [Bug target/88489] [9 Regression] FAIL: gcc.target/i386/avx512f-vfixupimmss-2.c execution test
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|x86 |x86_64-*-*, i?86-*-*
Target Milestone|--- |9.0
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Subject: [Bug target/88473] AVX512: constant folding on mask does not remove unnecessary instructions
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kyukhin at gcc dot gnu.org,
| |uros at gcc dot gnu.org,
| |vmakarov at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The *s on the =k, km *mov{di,si}_internal patterns (which I've copied to the
*zero_extend?i?i2 patterns) were introduced in
https://gcc.gnu.org/ml/gcc-patches/2014-08/msg01113.html
but there wasn't any discussion on why that has been introduced. Was that a
fear that the register allocator will start using the mask registers for cases
like
memory1 = memory2 | memory3;
instead of the GPRs? I'd say it would be useful to slightly disparage
transfers from GPRs to mask registers and back and perhaps also slightly
disparate mask stores into memory if needed to prevent using mask registers for
the logical ops or shifts with only memory arguments and keep the rest of the
alternative constaints (like =k, km) without any modifiers. And if that works,
change the mask intrinsics to be normal arithmetics instead of special builtins
with UNSPECs at RTL. Thoughts on that?
>From gcc-bugs-return-625904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 10:46:48 2018
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Subject: [Bug middle-end/88490] Missed autovectorization when indices are different
Date: Fri, 14 Dec 2018 10:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-14
CC| |rguenth at gcc dot gnu.org
Blocks| |49774
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
_33 = MEM[(double *)_28 clique 1 base 2];
MEM[(double *)_32 clique 1 base 2] = _33;
_35 = MEM[(double *)_28 + 8B clique 1 base 2];
MEM[(double *)_32 + 8B clique 1 base 2] = _35;
_49 = MEM[(double *)_28 clique 1 base 2];
MEM[(double *)_32 clique 1 base 2] = _49;
_51 = MEM[(double *)_28 + 8B clique 1 base 2];
MEM[(double *)_32 + 8B clique 1 base 2] = _51;
t.c:13:24: note: can't determine dependence between MEM[(double *)_32 clique 1
base 2] and MEM[(double *)_28 + 8B clique 1 base 2]
As you can see we do not exploit that n != k when assigning restrict tags
to the indirect loaded pointers. Nor would we do that when you load
those in an unrolled loop. Our restrict machinery is simply not set up
for this.
I don't see how a compiler could reliably and reasonably implement this.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49774
[Bug 49774] [meta-bug] restrict qualification aliasing issues
>From gcc-bugs-return-625905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 10:52:37 2018
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Subject: [Bug target/88224] Wrong Cortex-R7 and Cortex-R8 FPU configuration
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avieira at gcc dot gnu.org changed:
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--- Comment #4 from avieira at gcc dot gnu.org ---
Fixed on trunk and gcc-8.
>From gcc-bugs-return-625906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 10:58:00 2018
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Subject: [Bug tree-optimization/88492] SLP optimization generates ugly code
Date: Fri, 14 Dec 2018 10:58:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |missed-optimization
CC| |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
IIRC we have a duplicate for this. The issue is the SLP vectorizer doesn't
handle reductions (not implemented) and thus the vector results need
to be decomposed for the scalar reduction tail. On x86 we get with -mavx2
vmovdqu (%rdi), %xmm0
vpshufb .LC0(%rip), %xmm0, %xmm0
vpmovzxbw %xmm0, %xmm1
vpsrldq $8, %xmm0, %xmm0
vpmovzxwd %xmm1, %xmm2
vpsrldq $8, %xmm1, %xmm1
vpmovzxbw %xmm0, %xmm0
vpmovzxwd %xmm1, %xmm1
vmovaps %xmm2, -72(%rsp)
movl -68(%rsp), %eax
vmovaps %xmm1, -56(%rsp)
vpmovzxwd %xmm0, %xmm1
vpsrldq $8, %xmm0, %xmm0
addl -52(%rsp), %eax
vpmovzxwd %xmm0, %xmm0
vmovaps %xmm1, -40(%rsp)
movl -56(%rsp), %edx
addl -36(%rsp), %eax
vmovaps %xmm0, -24(%rsp)
addl -72(%rsp), %edx
addl -20(%rsp), %eax
addl -40(%rsp), %edx
addl -24(%rsp), %edx
addl %edx, %eax
movl -48(%rsp), %edx
addl -64(%rsp), %edx
addl -32(%rsp), %edx
addl -16(%rsp), %edx
addl %edx, %eax
movl -44(%rsp), %edx
addl -60(%rsp), %edx
addl -28(%rsp), %edx
addl -12(%rsp), %edx
addl %edx, %eax
ret
the main issue of course that we fail to elide the stack temporary.
Re-running FRE after loop opts might help here but of course
SLP vectorization handling the reduction would be best (though the
tail loop is structured badly, not matching up with the head one).
Whether vectorizing this specific testcases head loop is profitable
or not is questionable on its own of course (but you can easily make
it so and still get similar ugly code in the tail).
>From gcc-bugs-return-625907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 11:06:45 2018
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Subject: [Bug rtl-optimization/88253] Inlining of function incorrectly deletes volatile register access when using XOR in avr-gcc
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Senthil Kumar Selvaraj <saaadhu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |saaadhu at gcc dot gnu.org
--- Comment #4 from Senthil Kumar Selvaraj <saaadhu at gcc dot gnu.org> ---
Oh shoot, just sent https://gcc.gnu.org/ml/gcc-patches/2018-12/msg01028.html :)
>From gcc-bugs-return-625908-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 11:27:36 2018
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Subject: [Bug target/88473] AVX512: constant folding on mask does not remove unnecessary instructions
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The rationale for doing it the way it currently is done:
https://gcc.gnu.org/ml/gcc-patches/2016-11/msg02612.html
>From gcc-bugs-return-625909-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 11:44:41 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Fri, 14 Dec 2018 11:44:00 -0000
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--- Comment #11 from Moritz Kreutzer <moritz.kreutzer at siemens dot com> ---
Jakub, I can confirm it's working for masked gathers (we have a similar pattern
elsewhere in our code) with the latest trunk. Thanks for looking at the
scatters as well!
>From gcc-bugs-return-625910-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 12:01:23 2018
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Subject: [Bug middle-end/88490] Missed autovectorization when indices are different
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--- Comment #3 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
In this case s->d is pointer to pointer to double, and both pointer levels have
restrict qualifier. I wonder if you could add some tag that s->d[n] and s->d[k]
points to separate memory areas. This tag could be later used to determine that
s->d[n][0] and s->d[k][0] also do not overlap.
>From gcc-bugs-return-625911-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 12:12:40 2018
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Subject: [Bug middle-end/88490] Missed autovectorization when indices are different
Date: Fri, 14 Dec 2018 12:12:00 -0000
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 14 Dec 2018, bugzilla@poradnik-webmastera.com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88490
>
> --- Comment #3 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
> In this case s->d is pointer to pointer to double, and both pointer levels have
> restrict qualifier. I wonder if you could add some tag that s->d[n] and s->d[k]
> points to separate memory areas. This tag could be later used to determine that
> s->d[n][0] and s->d[k][0] also do not overlap.
Not easily. Consider the loads being hoisted before the if (k > n) check
for example. Note I do not think the C standard is sufficiently
clear with regarding to restrict qualified pointers loaded from
memory. Clearly s->d[n][0] and s->d[n][0] alias but they are not
based on each other.
>From gcc-bugs-return-625912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 12:38:42 2018
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Subject: [Bug target/88483] Unnecessary stack alignment
Date: Fri, 14 Dec 2018 12:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88483
--- Comment #1 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Fri Dec 14 12:38:04 2018
New Revision: 267133
URL: https://gcc.gnu.org/viewcvs?rev=267133&root=gcc&view=rev
Log:
x86: Don't use get_frame_size when finalizing stack frame
get_frame_size () returns used stack slots during compilation, which
may be optimized out later. Since ix86_find_max_used_stack_alignment
is called by ix86_finalize_stack_frame_flags to check if stack frame
is required, there is no need to call get_frame_size () which may give
inaccurate final stack frame size.
Tested on AVX512 machine configured with
--with-arch=native --with-cpu=native
gcc/
PR target/88483
* config/i386/i386.c (ix86_finalize_stack_frame_flags): Don't
use get_frame_size ().
gcc/testsuite/
PR target/88483
* gcc.target/i386/stackalign/pr88483.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/stackalign/pr88483.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-625913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 12:41:17 2018
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Subject: [Bug target/87370] [7/8/9 Regression] Inefficient return code of struct values
Date: Fri, 14 Dec 2018 12:41:00 -0000
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--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to trashyankes from comment #12)
> (In reply to H.J. Lu from comment #11)
> > (In reply to trashyankes from comment #10)
> >
> > Which GCC are you using? GCC 8.2 generates:
>
> GCC Explorer :D
>
> g++ (GCC-Explorer-Build) 9.0.0 20181211 (experimental)
>
> https://gcc.godbolt.org/z/7AQXiq
>
> Code is copy paste of test case.
> Compiler is x86-64
> Important are flags: `-O3 -march=skylake-avx512`
> Without it compile this code fine.
It has been fixed in GCC 9 by r267133.
>From gcc-bugs-return-625914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 12:44:35 2018
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Subject: [Bug target/88483] Unnecessary stack alignment
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----------------------------------------------------------------------------
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--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for GCC 9.
>From gcc-bugs-return-625915-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 13:28:49 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/88494] New: [9 Regression] polyhedron 10% mdbx runtime regression
Date: Fri, 14 Dec 2018 13:28:00 -0000
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Bug ID: 88494
Summary: [9 Regression] polyhedron 10% mdbx runtime regression
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Between r266526 (good) and r266587 (bad) polyhedron mdbx runtime regressed from
6s to 6.7s on a Haswell machine with -Ofast -march=native -funroll-loops.
https://gcc.opensuse.org/gcc-old/c++bench-czerny/pb11/pb11-summary.txt-2-0.html
There are not many interesting changes in the revision range but I sofar didn't
reproduce elsewhere nor bisected the above revs.
>From gcc-bugs-return-625916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 13:29:00 2018
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Subject: [Bug target/88494] [9 Regression] polyhedron 10% mdbx runtime regression
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-625917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 13:46:57 2018
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Subject: [Bug c++/88261] [9 Regression] ICE: verify_gimple failed (error: non-trivial conversion at assignment)
Date: Fri, 14 Dec 2018 13:46:00 -0000
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--- Comment #6 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #5)
> Right, but we're not supposed to ICE, even on invalid code.
Yes, ideed.
I think what would be needed is adding this C-error to the C++FE:
array-6.c: In function 'foo':
array-6.c:12:23: error: non-static initialization of a flexible array member
12 | struct str b = { 2, "b" };
| ^~~
array-6.c:12:23: note: (near initialization for 'b')
the error depends on TREE_STATIC (decl);
the data flow in the C-FE is just weird,
see "require_constant_value", a global value holds that bit...
I believe the right place to add in the C++ FE is probably
at where this C++ -Wpedantic warning is emitted,
array-6.c:12:27: warning: initialization of a flexible array member
[-Wpedantic]
12 | struct str b = { 2, "b" };
| ^
unfortunately that is in digest_init_r and that does not have
access to TREE_STATIC (decl);
In case the object is static, that should be a warning, but in case
of an automatic object it should be a error, that would prevent the ICE.
Either one need to a static variable like the C-FE or pass the decl
from store_init_value and probably other places too into the digest_init
and digest_init_flags.
Well, it will probably be better to add an additional decl parameter.
Thoughts?
>From gcc-bugs-return-625919-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 13:52:42 2018
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/88495] New: An OpenACC async queue is always synchronized with itself
Date: Fri, 14 Dec 2018 13:52:00 -0000
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Bug ID: 88495
Summary: An OpenACC async queue is always synchronized with
itself
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: openacc, patch
Severity: normal
Priority: P3
Component: libgomp
Assignee: tschwinge at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
CC: cltang at gcc dot gnu.org, jakub at gcc dot gnu.org
Target Milestone: ---
An OpenACC async queue is always synchronized with itself, so invocations like
"#pragma acc wait(0) async(0)", or "acc_wait_async(0, 0)" don't make a lot of
sense, but are still valid.
This will need to be fixed on all release branches.
I have a patch.
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Subject: [Bug tree-optimization/88044] [9 regression] gfortran.dg/transfer_intrinsic_3.f90 hangs after r266171
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--- Comment #6 from samtebbs at gcc dot gnu.org ---
Created attachment 45236
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45236&action=edit
arm-none-linux-gnueabihf with cpu and fpu options
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Subject: [Bug tree-optimization/88044] [9 regression] gfortran.dg/transfer_intrinsic_3.f90 hangs after r266171
Date: Fri, 14 Dec 2018 13:54:00 -0000
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--- Comment #7 from samtebbs at gcc dot gnu.org ---
I can confirm this test fails on arm-none-linux-gnueabihf when invoking with
"-mcpu=cortex-a5 -mfpu=vfpv3-d16-fp16", as Christophe wrote. Please see the
attached log.
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Subject: [Bug target/88496] New: Unnecessary stack adjustment with -mavx512f
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88496
Bug ID: 88496
Summary: Unnecessary stack adjustment with -mavx512f
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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CC: ubizjak at gmail dot com, wei3.xiao at intel dot com,
xuepeng.guo at intel dot com
Target Milestone: ---
Target: i386,x86-64
[hjl@gnu-cfl-1 gcc]$ cat /tmp/x.i
struct B
{
char a[12];
int b;
};
struct B
f2 (void)
{
struct B x = {};
return x;
}
[hjl@gnu-cfl-1 gcc]$ ./xgcc -B./ -O2 -S /tmp/x.i -mavx2
[hjl@gnu-cfl-1 gcc]$ cat x.s
.file "x.i"
.text
.p2align 4
.globl f2
.type f2, @function
f2:
.LFB0:
.cfi_startproc
xorl %eax, %eax
xorl %edx, %edx
ret
.cfi_endproc
.LFE0:
.size f2, .-f2
.ident "GCC: (GNU) 9.0.0 20181214 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 gcc]$ ./xgcc -B./ -O2 -S /tmp/x.i -mavx512f
[hjl@gnu-cfl-1 gcc]$ cat x.s
.file "x.i"
.text
.p2align 4
.globl f2
.type f2, @function
f2:
.LFB0:
.cfi_startproc
subq $16, %rsp
.cfi_def_cfa_offset 24
xorl %eax, %eax
xorl %edx, %edx
addq $16, %rsp
.cfi_def_cfa_offset 8
ret
.cfi_endproc
.LFE0:
.size f2, .-f2
.ident "GCC: (GNU) 9.0.0 20181214 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 gcc]$
subq and addq aren't necessary.
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Subject: [Bug middle-end/88497] New: Improve Accumulation in Auto-Vectorized Code
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Bug ID: 88497
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Subject: [Bug middle-end/88497] Improve Accumulation in Auto-Vectorized Code
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kelvin at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kelvin at gcc dot gnu.org,
| |rguenther at suse dot de,
| |segher at gcc dot gnu.org,
| |wschmidt at gcc dot gnu.org
--- Comment #1 from kelvin at gcc dot gnu.org ---
Consider the following loop:
double sacc = 0.00;
extern double x[], y[];
for (unsigned long long int i = 0; i < N; i++)
sacc += x[i] * y[i];
Auto-vectorization turns the body of the loop into something close to the
following function foo:
double foo (double accumulator, vector double arg2[], vector double arg3[])
{
vector double temp;
temp = arg2[0] * arg3[0];
accumulator += temp[0] + temp[1];
temp = arg2[1] * arg3[1];
accumulator += temp[0] + temp[1];
temp = arg2[2] * arg3[2];
accumulator += temp[0] + temp[1];
temp = arg2[3] * arg3[3];
accumulator += temp[0] + temp[1];
return accumulator;
}
Compiled with -O3 -mcpu=power9 -ffast-math, this translates into 25
instructions:
foo:
.LFB11:
.cfi_startproc
lxv 6,0(5)
lxv 10,0(4)
lxv 7,16(5)
lxv 11,16(4)
lxv 8,32(5)
lxv 12,32(4)
lxv 9,48(5)
lxv 0,48(4)
xvmuldp 10,10,6
xvmuldp 11,11,7
xvmuldp 12,12,8
xvmuldp 0,0,9
xxpermdi 7,10,10,3
xxpermdi 8,11,11,3
fadd 10,7,10
xxpermdi 9,12,12,3
fadd 11,8,11
xxpermdi 6,0,0,3
fadd 12,9,12
fadd 0,6,0
fadd 10,10,1
fadd 11,11,10
fadd 1,12,11
fadd 1,0,1
blr
If auto-vectorization were to transform this loop into the following equivalent
code, the resulting translation is only 18 instructions:
double foo (double accumulator, vector double arg2[], vector double arg3[])
{
vector double temp;
temp[0] = accumulator;
temp[1] = 0.0;
temp += arg2[0] * arg3[0];
temp += arg2[1] * arg3[1];
temp += arg2[2] * arg3[2];
temp += arg2[3] * arg3[3];
return temp[0] + temp[1];
}
foo:
.LFB11:
.cfi_startproc
li 9,0
lxv 10,0(4)
lxv 6,0(5)
lxv 11,16(4)
lxv 7,16(5)
mtvsrd 0,9
lxv 12,32(4)
lxv 8,32(5)
lxv 9,48(5)
xxpermdi 1,0,1,0
lxv 0,48(4)
xvmaddadp 1,10,6
xvmaddadp 1,11,7
xvmaddadp 1,12,8
xvmaddadp 1,0,9
xxpermdi 0,1,1,3
fadd 1,0,1
blr
I have also experimented with trunk's treatment of x86 targets, and the same
optimization is relevant there:
x86 -O3 -ffast-math optimized translation of the "original" source is:
_foo:
LFB1:
;; 17 insns in original code
;; movadp: 4
;; mulpd: 4
;; addsd: 4
;; haddpd: 4
;; ret: 1
;; total: 17
movapd 32(%rdi), %xmm2 ; load arg2[2]
mulpd 32(%rsi), %xmm2 ; multiply arg2[2] * arg3[2]
movapd (%rdi), %xmm1 ; load arg2[0]
movapd 16(%rdi), %xmm3 ; load arg2[1]
mulpd (%rsi), %xmm1 ; multiply arg2[0] * arg3[0]
mulpd 16(%rsi), %xmm3 ; multiply arg2[1] * arg3[1]
haddpd %xmm2, %xmm2 ; sum args[2] products
haddpd %xmm1, %xmm1 ; sum args[0] products
haddpd %xmm3, %xmm3 ; sum args[1] products
addsd %xmm0, %xmm2 ; add args[2] sum into accumulator
movapd 48(%rdi), %xmm0 ; load arg2[3]
mulpd 48(%rsi), %xmm0 ; multiply arg2[3] * arg3[3]
addsd %xmm3, %xmm1 ; add args[0] and args[1] products
addsd %xmm2, %xmm1 ; accumulate args[0..2] products
haddpd %xmm0, %xmm0 ; sum args[3] products
addsd %xmm1, %xmm0 ; accumulate args[0..3]
ret
The optimized translation of the "improved" source on x86 is:
_foo:
LFB1:
;; 15 insns in translation of improved source code
;; movq: 1
;; movadp: 4 (load vector
;; mulpd: 4
;; addpd: 4
;; haddpd: 1
;; ret: 1
;; total: 15
movapd (%rdi), %xmm1 ; load arg2[0]
movq %xmm0, %xmm0 ; move quad word: i don't understand this.
mulpd (%rsi), %xmm1 ; multiply arg2[0] * arg3[0]
movapd 16(%rdi), %xmm2 ; load arg2[1]
mulpd 16(%rsi), %xmm2 ; multiply arg2[1] * arg3[1]
movapd 48(%rdi), %xmm3 ; load arg2[3]
mulpd 48(%rsi), %xmm3 ; multiply arg2[3] * arg3[3]
addpd %xmm2, %xmm1 ; add args[0] and args[1] products
movapd 32(%rdi), %xmm2 ; load arg2 [2]
mulpd 32(%rsi), %xmm2 ; multiply arg2[2] * arg3[2]
addpd %xmm3, %xmm2 ; add args[2] and args[3] products
addpd %xmm2, %xmm1 ; adds all args products
addpd %xmm1, %xmm0 ; Add sums to accumulator
haddpd %xmm0, %xmm0 ; add double elements of vector
ret
>From gcc-bugs-return-625924-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 14:19:42 2018
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/87835] nvptx offloading: libgomp.oacc-c-c++-common/asyncwait-1.c execution test intermittently fails at -O2
Date: Fri, 14 Dec 2018 14:19:00 -0000
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Thomas Schwinge from comment #0)
> After r264397 "[nvptx] Remove use of CUDA unified memory in libgomp", I'm
> seeing (intermittently only, and only on some systems):
>
I see the failure reproduced consistently with a Quadro M1200.
> I have not yet analyzed what's causing this, but I have some ideas about
> pending patches that might cure it.
OK, let's see if those make it. If not, we may want to investigate and decide
if we want to revert the patch.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88489] [9 Regression] FAIL: gcc.target/i386/avx512f-vfixupimmss-2.c execution test
Date: Fri, 14 Dec 2018 14:32:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-14
Ever confirmed|0 |1
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
[hjl@gnu-skx-1 gcc]$ /export/ssd/git/gcc-test-native/bld/gcc/xgcc
-B/export/ssd/git/gcc-test-native/bld/gcc/
/export/ssd/git/gcc-test-native/src-trunk/gcc/testsuite/gcc.target/i386/avx512f-vfixupimmss-2.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -mavx512f -march=skylake-avx512
[hjl@gnu-skx-1 gcc]$ ./a.out
Aborted
[hjl@gnu-skx-1 gcc]$ /export/ssd/git/gcc-test-native/bld/gcc/xgcc -v
Using built-in specs.
COLLECT_GCC=/export/ssd/git/gcc-test-native/bld/gcc/xgcc
Target: x86_64-pc-linux-gnu
Configured with: ../src-trunk/configure --with-arch=native --with-cpu=native
--prefix=/usr/9.0.0 --enable-clocale=gnu --with-system-zlib --enable-shared
--enable-cet --with-demangler-in-ld --enable-libmpx
--with-multilib-list=m32,m64,mx32 --with-fpmath=sse
Thread model: posix
gcc version 9.0.0 20181214 (experimental) [trunk revision 267123] (GCC)
[hjl@gnu-skx-1 gcc]$
--with-arch=native --with-cpu=native is equivalent to -march=skylake-avx512.
It used to pass before r265827.
>From gcc-bugs-return-625926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 14:46:06 2018
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Subject: [Bug target/88498] New: [9 Regression] FAIL: gcc.target/i386/avx512vl-pr79299-1.c (internal compiler error)
Date: Fri, 14 Dec 2018 14:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88498
Bug ID: 88498
Summary: [9 Regression] FAIL:
gcc.target/i386/avx512vl-pr79299-1.c (internal
compiler error)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
Target: i386,x86-64
On x86-64, r267123 has
[hjl@gnu-cfl-1 gcc]$
/export/build/gnu/tools-build/gcc-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-debug/build-x86_64-linux/gcc/ -march=corei7
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -Ofast -mavx512vl -masm=intel -c -o
avx512vl-pr79299-1.o
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/avx512vl-pr79299-1.c
during GIMPLE pass: vect
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/avx512vl-pr79299-1.c:
In function \u2018f1\u2019:
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/avx512vl-pr79299-1.c:15:1:
internal compiler error: in vect_gen_perm_mask_checked, at
tree-vect-stmts.c:7269
0x14c4956 vect_gen_perm_mask_checked(tree_node*, vec_perm_indices const&)
/export/gnu/import/git/sources/gcc/gcc/tree-vect-stmts.c:7269
0x14b3759 vect_build_gather_load_calls
/export/gnu/import/git/sources/gcc/gcc/tree-vect-stmts.c:2698
0x14c5c2f vectorizable_load
/export/gnu/import/git/sources/gcc/gcc/tree-vect-stmts.c:7629
0x14ccb75 vect_transform_stmt(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*)
/export/gnu/import/git/sources/gcc/gcc/tree-vect-stmts.c:9655
0x14f157a vect_transform_loop_stmt
/export/gnu/import/git/sources/gcc/gcc/tree-vect-loop.c:8139
0x14f224f vect_transform_loop(_loop_vec_info*)
/export/gnu/import/git/sources/gcc/gcc/tree-vect-loop.c:8358
0x151d21e try_vectorize_loop_1
/export/gnu/import/git/sources/gcc/gcc/tree-vectorizer.c:969
0x151d4b5 try_vectorize_loop
/export/gnu/import/git/sources/gcc/gcc/tree-vectorizer.c:1019
0x151d685 vectorize_loops()
/export/gnu/import/git/sources/gcc/gcc/tree-vectorizer.c:1101
0x1389785 execute
/export/gnu/import/git/sources/gcc/gcc/tree-ssa-loop.c:414
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.
[hjl@gnu-cfl-1 gcc]$
>From gcc-bugs-return-625927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 14:48:46 2018
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Subject: [Bug target/88498] [9 Regression] FAIL: gcc.target/i386/avx512vl-pr79299-1.c (internal compiler error)
Date: Fri, 14 Dec 2018 14:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88498
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-14
CC| |wei3.xiao at intel dot com,
| |xuepeng.guo at intel dot com
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Also:
FAIL: gcc.target/i386/pr81225.c (internal compiler error)
/export/build/gnu/tools-build/gcc-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-debug/build-x86_64-linux/gcc/
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/pr81225.c
-march=corei7 -fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -mavx512ifma -O3 -ffloat-store -S -o pr81225.s
during GIMPLE pass: vect
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/pr81225.c: In
function \u2018foo\u2019:
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/pr81225.c:10:1:
internal compiler error: in vect_gen_perm_mask_checked, at
tree-vect-stmts.c:7269
0x14c4956 vect_gen_perm_mask_checked(tree_node*, vec_perm_indices const&)
/export/gnu/import/git/sources/gcc/gcc/tree-vect-stmts.c:7269
0x14b3759 vect_build_gather_load_calls
/export/gnu/import/git/sources/gcc/gcc/tree-vect-stmts.c:2698
0x14c5c2f vectorizable_load
/export/gnu/import/git/sources/gcc/gcc/tree-vect-stmts.c:7629
0x14ccb75 vect_transform_stmt(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*)
/export/gnu/import/git/sources/gcc/gcc/tree-vect-stmts.c:9655
0x14f157a vect_transform_loop_stmt
/export/gnu/import/git/sources/gcc/gcc/tree-vect-loop.c:8139
0x14f224f vect_transform_loop(_loop_vec_info*)
/export/gnu/import/git/sources/gcc/gcc/tree-vect-loop.c:8358
0x151d21e try_vectorize_loop_1
/export/gnu/import/git/sources/gcc/gcc/tree-vectorizer.c:969
0x151d4b5 try_vectorize_loop
/export/gnu/import/git/sources/gcc/gcc/tree-vectorizer.c:1019
0x151d685 vectorize_loops()
/export/gnu/import/git/sources/gcc/gcc/tree-vectorizer.c:1101
0x1389785 execute
/export/gnu/import/git/sources/gcc/gcc/tree-ssa-loop.c:414
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.
[hjl@gnu-cfl-1 gcc]$
>From gcc-bugs-return-625928-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 15:02:11 2018
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Subject: [Bug d/88462] All D execution tests FAIL on Solaris/SPARC
Date: Fri, 14 Dec 2018 15:02:00 -0000
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Johannes Pfau <johannespfau at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |johannespfau at gmail dot com
--- Comment #10 from Johannes Pfau <johannespfau at gmail dot com> ---
I guess the proper fix to the alignment problem is using
'https://dlang.org/phobos/std_traits.html#classInstanceAlignment' (or rather
the druntime equivalent) instead of Mutex.alignof + the rounding / slice
assignment fixes?
Regarding the ModuleInfo problem: Although ModuleInfo does have a variable
size, _flags ist the first field in the struct. So the whole struct instance
has to be misaligned for some reason? Is the minfo section aligned properly?
>From gcc-bugs-return-625929-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 15:26:46 2018
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Subject: [Bug other/88499] New: Check for less than zero removed before floating point division causes division by zero (fast-math mode)
Date: Fri, 14 Dec 2018 15:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88499
Bug ID: 88499
Summary: Check for less than zero removed before floating point
division causes division by zero (fast-math mode)
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 45237
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45237&action=edit
minimal source to reproduce the problem
See the attached file.
I've tried 4.8.2 and 8.2.0. on x86-64 Linux. Both failed with SIGFPE.
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Subject: [Bug other/88499] Check for less than zero removed before floating point division causes division by zero (fast-math mode)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88499
--- Comment #1 from Teodor Petrov <fuscated at gmail dot com> ---
Here are the commands used to reproduce the bug:
$ g++ -g -fPIC -Ofast -msse4.2 -std=c++11 -ffunction-sections -fdata-sections
-ffast-math -fvisibility=hidden -fexceptions -Wno-c++11-extensions
gcc_division.cpp
$ ./a.out
p=0.000; i=0
Floating point exception (core dumped)
If I move the if-else which sets the y0 outside of the loop just after the
printf call it works as expected and there is no SIGFPE.
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/88462] All D execution tests FAIL on Solaris/SPARC
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--- Comment #11 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #10 from Johannes Pfau <johannespfau at gmail dot com> ---
> I guess the proper fix to the alignment problem is using
> 'https://dlang.org/phobos/std_traits.html#classInstanceAlignment' (or rather
> the druntime equivalent) instead of Mutex.alignof + the rounding / slice
> assignment fixes?
Seems plausible: the current situation is nothing more than a hack to
get me further along, and I've only just started reading up on D.
> Regarding the ModuleInfo problem: Although ModuleInfo does have a variable
> size, _flags ist the first field in the struct. So the whole struct instance
> has to be misaligned for some reason? Is the minfo section aligned properly?
It is: both minfo sections on libgdruntime.so and libgphobos.so are:
libdruntime/.libs/libgdruntime.so:
Section Header[28]: sh_name: minfo
sh_addr: 0x17b834 sh_flags: [ SHF_WRITE SHF_ALLOC ]
sh_size: 0x344 sh_type: [ SHT_PROGBITS ]
sh_offset: 0x16b834 sh_entsize: 0
sh_link: 0 sh_info: 0
sh_addralign: 0x4
src/.libs/libgphobos.so:
Section Header[28]: sh_name: minfo
sh_addr: 0x6ff014 sh_flags: [ SHF_WRITE SHF_ALLOC ]
sh_size: 0x224 sh_type: [ SHT_PROGBITS ]
sh_offset: 0x6ef014 sh_entsize: 0
sh_link: 0 sh_info: 0
sh_addralign: 0x4
And looking at a statically linked test program (gdc283.exe), I see
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0x0007c970 in object.ModuleInfo.flags() const (this=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1541
1541 @property uint flags() nothrow pure @nogc { return _flags; }
(gdb) p this
$1 = (const object.ModuleInfo &) @0x12ab33: {_flags = 4100, _index = 0}
(gdb) up
#1 0x0007d118 in object.ModuleInfo.importedModules() const (this=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1580
1580 if (flags & MIimportedModules)
(gdb) up
#2 0x0008ed74 in rt.minfo.ModuleGroup.sortCtors(immutable(char)[]) (this=...,
cycleHandling=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:259
259 foreach (imp; m.importedModules)
(gdb) p this
$2 = (rt.minfo.ModuleGroup &) @0x12f228: {_modules = {
0x12932c <ModuleInfo for gdc283>,
0x1297ac <ModuleInfo for core.exception>,
0x129acc <ModuleInfo for gcc.deh>,
0x129ae4 <ModuleInfo for gcc.unwind.pe>,
0x12a99c <ModuleInfo for object>, 0x12aafc <ModuleInfo for rt.aaA>,
0x12ab33 <ModuleInfo for rt.adi>, 0x12ab42 <ModuleInfo for rt.arraycat>,
0x12ab56 <ModuleInfo for rt.cast_>, 0x12ab67 <ModuleInfo for rt.deh>,
0x12ab77 <ModuleInfo for rt.dmain2>,
0x12ab89 <ModuleInfo for invariant>,
i.e. everything starts off alright, but goes astray from 0x12ab33
<ModuleInfo for rt.adi> onwards.
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Subject: [Bug go/88500] New: [SH]: SETCONTEXT_CLOBBERS_TLS needs to be handled in libgo
Date: Fri, 14 Dec 2018 16:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88500
Bug ID: 88500
Summary: [SH]: SETCONTEXT_CLOBBERS_TLS needs to be handled in
libgo
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: go
Assignee: ian at airs dot com
Reporter: glaubitz at physik dot fu-berlin.de
CC: cmang at google dot com, ian at airs dot com, jrtc27 at jrtc27 dot com,
kkojima at gcc dot gnu.org, olegendo at gcc dot gnu.org
Target Milestone: ---
Target: sh*-*-*
Trying to build gcc-8 with gccgo enabled fails on sh4 now with:
libtool: compile: /<<PKGBUILDDIR>>/build/./gcc/xgcc
-B/<<PKGBUILDDIR>>/build/./gcc/ -B/usr/sh4-linux-gnu/bin/
-B/usr/sh4-linux-gnu/lib/ -isystem /usr/sh4-linux-gnu/include -isystem
/usr/sh4-linux-gnu/sys-include -isystem /<<PKGBUILDDIR>>/build/sys-include
-DHAVE_CONFIG_H -I. -I../../../src/libgo -I ../../../src/libgo/runtime
-I../../../src/libgo/../libffi/include -I../libffi/include -pthread
-L../libatomic/.libs -fexceptions -fnon-call-exceptions -fno-stack-protector
-Wall -Wextra -Wwrite-strings -Wcast-qual -D_GNU_SOURCE -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -I ../../../src/libgo/../libgcc -I
../../../src/libgo/../libbacktrace -I ../../gcc/include -g -O2 -MT
go-unsafe-pointer.lo -MD -MP -MF .deps/go-unsafe-pointer.Tpo -c
../../../src/libgo/runtime/go-unsafe-pointer.c -o go-unsafe-pointer.o
>/dev/null 2>&1
../../../src/libgo/runtime/proc.c:171:4: error: #error unknown case for
SETCONTEXT_CLOBBERS_TLS
# error unknown case for SETCONTEXT_CLOBBERS_TLS
^~~~~
../../../src/libgo/runtime/proc.c: In function 'runtime_gogo':
../../../src/libgo/runtime/proc.c:289:2: warning: implicit declaration of
function 'fixcontext'; did you mean 'setcontext'?
[-Wimplicit-function-declaration]
fixcontext(ucontext_arg(&newg->context[0]));
^~~~~~~~~~
setcontext
../../../src/libgo/runtime/proc.c: In function 'runtime_mstart':
../../../src/libgo/runtime/proc.c:492:2: warning: implicit declaration of
function 'initcontext'; did you mean 'setcontext'?
[-Wimplicit-function-declaration]
initcontext();
^~~~~~~~~~~
setcontext
Looking at libgo/runtime/proc.c, it looks like this is because sh*-*-* defines
SETCONTEXT_CLOBBERS_TLS and it needs to be handled in libgo/runtime/proc.c.
>From gcc-bugs-return-625933-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 16:43:33 2018
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Subject: [Bug other/88499] Check for less than zero removed before floating point division causes division by zero (fast-math mode)
Date: Fri, 14 Dec 2018 16:43:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
I don't think using fenv.h with -ffast-math makes much sense.
>From gcc-bugs-return-625934-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 16:44:45 2018
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Subject: [Bug c++/88261] [9 Regression] ICE: verify_gimple failed (error: non-trivial conversion at assignment)
Date: Fri, 14 Dec 2018 16:44:00 -0000
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--- Comment #7 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
Created attachment 45238
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45238&action=edit
untested patch
>From gcc-bugs-return-625935-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 17:05:25 2018
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Subject: [Bug target/88474] Inline built-in hypot for -ffast-math
Date: Fri, 14 Dec 2018 17:05:00 -0000
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--- Comment #2 from uros at gcc dot gnu.org ---
Author: uros
Date: Fri Dec 14 17:04:48 2018
New Revision: 267137
URL: https://gcc.gnu.org/viewcvs?rev=267137&root=gcc&view=rev
Log:
PR target/88474
* internal-fn.def (HYPOT): New.
* optabs.def (hypot_optab): New.
* config/i386/i386.md (hypot<mode>3): New expander.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
trunk/gcc/internal-fn.def
trunk/gcc/optabs.def
>From gcc-bugs-return-625936-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 17:16:52 2018
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Subject: [Bug middle-end/88487] union prevents autovectorization
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--- Comment #4 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
OK, I see. Is there any workaround for this? I tried to assign pointer to local
variable directly and with intermediate casting via void*, but it did not help.
Casting S1* to S2* also does not work.
>From gcc-bugs-return-625937-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 17:28:12 2018
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Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Fri, 14 Dec 2018 17:28:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45239
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45239&action=edit
gcc9-pr88464-2.patch
Incremental untested patch.
First of all, I've missed an important case for gathers in the testsuite
coverage, float with long index type on -m64, that actually ICEd due to
multiple issues.
The rest of the patch implements masked scatters, though at least for now only
for 512-bit vectors. The problem for 128-bit and 256-bit is that the
vectorizer computes the comparisons in an integral vector rather than bool
vector (i.e. int); perhaps we could just emit an instruction that sets masks
from the MSB bits of such a vector.
>From gcc-bugs-return-625938-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 17:34:27 2018
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Subject: [Bug target/88489] [9 Regression] FAIL: gcc.target/i386/avx512f-vfixupimmss-2.c execution test
Date: Fri, 14 Dec 2018 17:34:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The test FAILs even at -O0 when built with -mavx512vl, when built e.g. with
-mavx512{bw,dq} it works fine.
>From gcc-bugs-return-625939-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 17:37:49 2018
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From: "jg at jguk dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88501] New: Improve suggested alternative to be closer to typo
Date: Fri, 14 Dec 2018 17:37:00 -0000
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Bug ID: 88501
Summary: Improve suggested alternative to be closer to typo
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"string" spelt as "stting" gives suggestion "stdin" which is 2 characters
different than the expected suggestion to "string".
I imagine it is difficult to get suggestions right, but ideally same length
chars would be considered a closer match.
$ g++ -Wall -o string string.cpp
string.cpp: In function ‘int main()’:
string.cpp:8:5: error: ‘stting’ was not declared in this scope
stting buf;
^~~~~~
string.cpp:8:5: note: suggested alternative: ‘stdin’
stting buf;
^~~~~~
stdin
string.cpp:10:5: error: ‘buf’ was not declared in this scope
buf = "hello";
^~~
// g++ -Wall -o string string.cpp
#include <string>
using namespace std;
int main()
{
stting buf;
buf = "hello";
}
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Subject: [Bug other/88499] Check for less than zero removed before floating point division causes division by zero (fast-math mode)
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--- Comment #3 from Teodor Petrov <fuscated at gmail dot com> ---
@Marc Glisse: Would it be possible to give an explanation why this is not a
good idea? Link to some kind of a documentation which explains that this
behaviour is expected?
>From gcc-bugs-return-625941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 17:58:36 2018
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Subject: [Bug target/88489] [9 Regression] FAIL: gcc.target/i386/avx512f-vfixupimmss-2.c execution test
Date: Fri, 14 Dec 2018 17:58:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45240
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45240&action=edit
gcc9-pr88489.patch
Untested fix. The problem was that the sd pattern had the same RTL as the pd
for 128-bit vectors, but behaved differently.
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Subject: [Bug c++/88261] [9 Regression] ICE: verify_gimple failed (error: non-trivial conversion at assignment)
Date: Fri, 14 Dec 2018 18:26:00 -0000
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Bernd Edlinger <bernd.edlinger at hotmail dot de> changed:
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----------------------------------------------------------------------------
CC| |bernd.edlinger at hotmail dot de
--- Comment #8 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Interesting: above patch adds an error in
gcc/testsuite/g++.dg/warn/Wplacement-new-size-1.C
where this is no ICE but only wrong code (I modified the test case
a bit to demonstrate the Problem):
$ cat Wplacement-new-size-1.C
// PR c++/69662 - -Wplacement-new on allocated one element array members
// Exercising the more permissive -Wplacement-new=1. The difference
// between -Wplacement-new=1 is denoted by "no warning at level 1" in
// the comments below.
// { dg-do compile }
// { dg-options "-Wno-pedantic -Wplacement-new=1" }
typedef __typeof__ (sizeof 0) size_t;
void* operator new (size_t, void *p) { return p; }
void* operator new[] (size_t, void *p) { return p; }
struct Ax { char n, a []; };
typedef __INT16_TYPE__ Int16;
char xx[3];
void fAx2 ()
{
Ax ax2 = { 1, { 2, 3 } };
new (ax2.a) Int16(123);
__builtin_memcpy(xx, &ax2, 3);
}
int main()
{
fAx2 ();
}
$ g++ -O2 Wplacement-new-size-1.C
$ ./a.out
Segmentation fault (core dumped)
$ g++ -S -O2 Wplacement-new-size-1.C
$ cat Wplacement-new-size-1.s
.file "Wplacement-new-size-1.C"
.text
.p2align 4
.globl _ZnwmPv
.type _ZnwmPv, @function
_ZnwmPv:
.LFB0:
.cfi_startproc
movq %rsi, %rax
ret
.cfi_endproc
.LFE0:
.size _ZnwmPv, .-_ZnwmPv
.p2align 4
.globl _ZnamPv
.type _ZnamPv, @function
_ZnamPv:
.LFB5:
.cfi_startproc
movq %rsi, %rax
ret
.cfi_endproc
.LFE5:
.size _ZnamPv, .-_ZnamPv
.section .rodata
.LC0:
.byte 1
.byte 2
.byte 3
.text
.p2align 4
.globl _Z4fAx2v
.type _Z4fAx2v, @function
_Z4fAx2v:
.LFB2:
.cfi_startproc
movzbl .LC0(%rip), %eax
movb %al, -1(%rsp)
movl $123, %eax
movw %ax, (%rsp)
movzwl -1(%rsp), %eax
movw %ax, xx(%rip)
movzbl 1(%rsp), %eax
movb %al, xx+2(%rip)
ret
.cfi_endproc
.LFE2:
.size _Z4fAx2v, .-_Z4fAx2v
.section .text.startup,"ax",@progbits
.p2align 4
.globl main
.type main, @function
main:
.LFB3:
.cfi_startproc
movzbl .LC0(%rip), %eax
movb %al, -1(%rsp)
movl $123, %eax
movw %ax, (%rsp)
movzwl -1(%rsp), %eax
movw %ax, xx(%rip)
movzbl 1(%rsp), %eax
movb %al, xx+2(%rip)
xorl %eax, %eax
ret
.cfi_endproc
.LFE3:
.size main, .-main
.globl xx
.bss
.type xx, @object
.size xx, 3
xx:
.zero 3
.ident "GCC: (GNU) 9.0.0 20181209 (experimental)"
.section .note.GNU-stack,"",@progbits
So Ax2 has actually only 1 Byte space on the stack,
and "new (ax2.a) Int16(123);"
overwrites the return stack
>From gcc-bugs-return-625943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 18:29:54 2018
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Subject: [Bug middle-end/88490] Missed autovectorization when indices are different
Date: Fri, 14 Dec 2018 18:29:00 -0000
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--- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Fri, 14 Dec 2018, rguenther at suse dot de wrote:
> Note I do not think the C standard is sufficiently clear with regarding
> to restrict qualified pointers loaded from memory.
I think this is where "Every access that modifies X shall be considered
also to modify P, for the purposes of this subclause." comes in. (See
what I said at <https://gcc.gnu.org/ml/gcc-bugs/2005-01/msg03394.html>.)
Modifying s->d[n][0] is considered to modify s->d[n], and so considered to
modify s->d, and so considered to modify s. (It's still perfectly valid
to have n == k; what's not valid is aliasing between objects accessed via
s->d[0] and s->d[1], for example.)
>From gcc-bugs-return-625944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 19:02:59 2018
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Subject: [Bug other/88499] Check for less than zero removed before floating point division causes division by zero (fast-math mode)
Date: Fri, 14 Dec 2018 19:02:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
You need to turn back on trapping math, -ftrapping-math for this to work
correctly. -ftrapping-math is turned off with -ffast-math.
>From gcc-bugs-return-625945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 19:21:28 2018
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Subject: [Bug c++/88501] Improve suggested alternative to be closer to typo
Date: Fri, 14 Dec 2018 19:21:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
CC| |dmalcolm at gcc dot gnu.org,
| |egallager at gcc dot gnu.org
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Another heuristic besides length chars would be that "string" is a typename and
"stdin" isn't. David?
>From gcc-bugs-return-625947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 19:37:14 2018
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Subject: [Bug c++/82294] Array of objects with constexpr constructors initialized from space-inefficient memory image
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 14 19:36:33 2018
New Revision: 267142
URL: https://gcc.gnu.org/viewcvs?rev=267142&root=gcc&view=rev
Log:
PR c++/82294
PR c++/87436
* init.c (build_vec_init): Change num_initialized_elts type from int
to HOST_WIDE_INT. Build a RANGE_EXPR if e needs to be repeated more
than once.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/init.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87436] [7/8/9 Regression] G++ produces >300MB .rodata section to initialize struct with big array
Date: Fri, 14 Dec 2018 19:37:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 14 19:36:33 2018
New Revision: 267142
URL: https://gcc.gnu.org/viewcvs?rev=267142&root=gcc&view=rev
Log:
PR c++/82294
PR c++/87436
* init.c (build_vec_init): Change num_initialized_elts type from int
to HOST_WIDE_INT. Build a RANGE_EXPR if e needs to be repeated more
than once.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/init.c
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Subject: [Bug c++/82294] Array of objects with constexpr constructors initialized from space-inefficient memory image
Date: Fri, 14 Dec 2018 19:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82294
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 14 19:37:38 2018
New Revision: 267143
URL: https://gcc.gnu.org/viewcvs?rev=267143&root=gcc&view=rev
Log:
PR c++/82294
PR c++/87436
* expr.h (categorize_ctor_elements): Add p_unique_nz_elts argument.
* expr.c (categorize_ctor_elements_1): Likewise. Compute it like
p_nz_elts, except don't multiply it by mult. Adjust recursive call.
Fix up COMPLEX_CST handling.
(categorize_ctor_elements): Add p_unique_nz_elts argument, initialize
it and pass it through to categorize_ctor_elements_1.
(mostly_zeros_p, all_zeros_p): Adjust categorize_ctor_elements callers.
* gimplify.c (gimplify_init_constructor): Likewise. Don't force
ctor into readonly data section if num_unique_nonzero_elements is
smaller or equal to 1/8 of num_nonzero_elements and size is >= 64
bytes.
* g++.dg/tree-ssa/pr82294.C: New test.
* g++.dg/tree-ssa/pr87436.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/tree-ssa/pr82294.C
trunk/gcc/testsuite/g++.dg/tree-ssa/pr87436.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expr.c
trunk/gcc/expr.h
trunk/gcc/gimplify.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87436] [7/8/9 Regression] G++ produces >300MB .rodata section to initialize struct with big array
Date: Fri, 14 Dec 2018 19:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87436
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 14 19:37:38 2018
New Revision: 267143
URL: https://gcc.gnu.org/viewcvs?rev=267143&root=gcc&view=rev
Log:
PR c++/82294
PR c++/87436
* expr.h (categorize_ctor_elements): Add p_unique_nz_elts argument.
* expr.c (categorize_ctor_elements_1): Likewise. Compute it like
p_nz_elts, except don't multiply it by mult. Adjust recursive call.
Fix up COMPLEX_CST handling.
(categorize_ctor_elements): Add p_unique_nz_elts argument, initialize
it and pass it through to categorize_ctor_elements_1.
(mostly_zeros_p, all_zeros_p): Adjust categorize_ctor_elements callers.
* gimplify.c (gimplify_init_constructor): Likewise. Don't force
ctor into readonly data section if num_unique_nonzero_elements is
smaller or equal to 1/8 of num_nonzero_elements and size is >= 64
bytes.
* g++.dg/tree-ssa/pr82294.C: New test.
* g++.dg/tree-ssa/pr87436.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/tree-ssa/pr82294.C
trunk/gcc/testsuite/g++.dg/tree-ssa/pr87436.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expr.c
trunk/gcc/expr.h
trunk/gcc/gimplify.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-625950-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 19:55:56 2018
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Subject: [Bug target/88498] [9 Regression] FAIL: gcc.target/i386/avx512vl-pr79299-1.c (internal compiler error)
Date: Fri, 14 Dec 2018 19:55:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Please try https://gcc.gnu.org/ml/gcc-patches/2018-12/msg01085.html
>From gcc-bugs-return-625951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 20:01:46 2018
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Subject: [Bug middle-end/88497] Improve Accumulation in Auto-Vectorized Code
Date: Fri, 14 Dec 2018 20:01:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Is that though something the vectorizer should do, or better something some
post-vectorization pass like reassoc which already has such infrastructure
should do?
>From gcc-bugs-return-625952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 20:02:16 2018
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Subject: [Bug middle-end/88497] Improve Accumulation in Auto-Vectorized Code
Date: Fri, 14 Dec 2018 20:02:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Obviously, in either case for -ffast-math only.
>From gcc-bugs-return-625953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 20:06:54 2018
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From: "aoliva at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86823] [7/8/9 Regression] private member template struct/class is publicly accessible
Date: Fri, 14 Dec 2018 20:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86823
--- Comment #7 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Author: aoliva
Date: Fri Dec 14 20:06:15 2018
New Revision: 267144
URL: https://gcc.gnu.org/viewcvs?rev=267144&root=gcc&view=rev
Log:
[PR86823] retain deferred access checks from outside firewall
We used to preserve deferred access check along with resolved template
ids, but a tentative parsing firewall introduced additional layers of
deferred access checks, so that we don't preserve the checks we
want to any more.
This patch moves the deferred access checks from outside the firewall
into it.
From: Jason Merrill <jason@redhat.com>
for gcc/cp/ChangeLog
PR c++/86823
* parser.c (cp_parser_template_id): Rearrange deferred access
checks into the firewall.
From: Alexandre Oliva <aoliva@redhat.com>
for gcc/testsuite/ChangeLog
PR c++/86823
* g++.dg/pr86823.C: New.
Added:
trunk/gcc/testsuite/g++.dg/pr86823.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-625954-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 20:36:38 2018
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88261] [9 Regression] ICE: verify_gimple failed (error: non-trivial conversion at assignment)
Date: Fri, 14 Dec 2018 20:36:00 -0000
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--- Comment #9 from Jeffrey A. Law <law at redhat dot com> ---
Thanks for running with this Bernd. My brain was too mushy last night to get
anywhere. I agree that digest_init_r seems like the right place to try and
address this problem.
ISTM we could either add the DECL as a parameter or pass in some kind of state
to indicate if it's automatic or static. I've got no strong opinion on which
of those two approaches is best -- but Jason will have the final call here.
>From gcc-bugs-return-625955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 20:42:48 2018
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/88370] acc_get_cuda_stream/acc_set_cuda_stream: acc_async_sync, acc_async_noval
Date: Fri, 14 Dec 2018 20:42:00 -0000
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--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Fri Dec 14 20:42:08 2018
New Revision: 267147
URL: https://gcc.gnu.org/viewcvs?rev=267147&root=gcc&view=rev
Log:
[PR88370] acc_get_cuda_stream/acc_set_cuda_stream: acc_async_sync,
acc_async_noval
Per my reading of the OpenACC specification (and as supported by secondary
documentation, such as code examples, or presentations), it's valid to call
"acc_get_cuda_stream"/"acc_set_cuda_stream" also with "acc_async_sync",
"acc_async_noval" arguments, not just with the nonnegative values as currently
implemented.
libgomp/
PR libgomp/88370
* libgomp.texi (acc_get_current_cuda_context, acc_get_cuda_stream)
(acc_set_cuda_stream): Clarify.
* oacc-cuda.c (acc_get_cuda_stream, acc_set_cuda_stream): Use
"async_valid_p".
* plugin/plugin-nvptx.c (nvptx_set_cuda_stream): Refuse "async ==
acc_async_sync".
* testsuite/libgomp.oacc-c-c++-common/acc_set_cuda_stream-1.c: New
file.
* testsuite/libgomp.oacc-c-c++-common/async_queue-1.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/lib-84.c: Update.
* testsuite/libgomp.oacc-c-c++-common/lib-85.c: Likewise.
Added:
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/acc_set_cuda_stream-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/async_queue-1.c
Modified:
trunk/libgomp/ChangeLog
trunk/libgomp/libgomp.texi
trunk/libgomp/oacc-cuda.c
trunk/libgomp/plugin/plugin-nvptx.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/lib-84.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/lib-85.c
>From gcc-bugs-return-625956-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 20:43:17 2018
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Subject: [Bug libgomp/88407] [OpenACC] Correctly handle unseen async-arguments
Date: Fri, 14 Dec 2018 20:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88407
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Fri Dec 14 20:42:40 2018
New Revision: 267150
URL: https://gcc.gnu.org/viewcvs?rev=267150&root=gcc&view=rev
Log:
[PR88407] [OpenACC] Correctly handle unseen async-arguments
... which turn the operation into a no-op.
libgomp/
PR libgomp/88407
* plugin/plugin-nvptx.c (nvptx_async_test, nvptx_wait)
(nvptx_wait_async): Unseen async-argument is a no-op.
* testsuite/libgomp.oacc-c-c++-common/async_queue-1.c: Update.
* testsuite/libgomp.oacc-c-c++-common/data-2-lib.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/data-2.c: Likewise.
* testsuite/libgomp.oacc-c-c++-common/lib-79.c: Likewise.
* testsuite/libgomp.oacc-fortran/lib-12.f90: Likewise.
* testsuite/libgomp.oacc-c-c++-common/lib-71.c: Merge into...
* testsuite/libgomp.oacc-c-c++-common/lib-69.c: ... this. Update.
* testsuite/libgomp.oacc-c-c++-common/lib-77.c: Merge into...
* testsuite/libgomp.oacc-c-c++-common/lib-74.c: ... this. Update
Removed:
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/lib-71.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/lib-77.c
Modified:
trunk/libgomp/ChangeLog
trunk/libgomp/plugin/plugin-nvptx.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/async_queue-1.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/data-2-lib.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/data-2.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/lib-69.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/lib-74.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/lib-79.c
trunk/libgomp/testsuite/libgomp.oacc-fortran/lib-12.f90
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/88495] An OpenACC async queue is always synchronized with itself
Date: Fri, 14 Dec 2018 20:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88495
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Fri Dec 14 20:43:02 2018
New Revision: 267152
URL: https://gcc.gnu.org/viewcvs?rev=267152&root=gcc&view=rev
Log:
[PR88495] An OpenACC async queue is always synchronized with itself
An OpenACC async queue is always synchronized with itself, so invocations like
"#pragma acc wait(0) async(0)", or "acc_wait_async (0, 0)" don't make a lot of
sense, but are still valid.
libgomp/
PR libgomp/88495
* plugin/plugin-nvptx.c (nvptx_wait_async): Don't refuse
"identical parameters".
* testsuite/libgomp.oacc-c-c++-common/asyncwait-nop-1.c: Update.
* testsuite/libgomp.oacc-c-c++-common/lib-80.c: Remove.
Removed:
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/lib-80.c
Modified:
trunk/libgomp/ChangeLog
trunk/libgomp/plugin/plugin-nvptx.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/asyncwait-nop-1.c
>From gcc-bugs-return-625957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 20:43:28 2018
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Subject: [Bug libgomp/88484] OpenACC wait directive without wait argument but with async clause
Date: Fri, 14 Dec 2018 20:43:00 -0000
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--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Fri Dec 14 20:42:50 2018
New Revision: 267151
URL: https://gcc.gnu.org/viewcvs?rev=267151&root=gcc&view=rev
Log:
[PR88484] OpenACC wait directive without wait argument but with async clause
We don't correctly handle "#pragma acc wait async (a)" for "a >= 0", handling
as a no-op whereas it should enqueue the appropriate wait operations on
"async (a)".
libgomp/
PR libgomp/88484
* oacc-parallel.c (GOACC_wait): Correct handling for "async >= 0".
* testsuite/libgomp.oacc-c-c++-common/asyncwait-nop-1.c: New file.
Added:
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/asyncwait-nop-1.c
Modified:
trunk/libgomp/ChangeLog
trunk/libgomp/oacc-parallel.c
>From gcc-bugs-return-625959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 20:54:32 2018
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Subject: [Bug middle-end/88497] Improve Accumulation in Auto-Vectorized Code
Date: Fri, 14 Dec 2018 20:54:00 -0000
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--- Comment #4 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Yes, reassociation sounds like the right place to look at this.
>From gcc-bugs-return-625960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 20:58:16 2018
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From: "balakrishnan.erode at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/78986] [7/8/9 Regression] template inner classes are not affected by access specifiers
Date: Fri, 14 Dec 2018 20:58:00 -0000
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Balakrishnan B <balakrishnan.erode at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |balakrishnan.erode at gmail dot co
| |m
--- Comment #2 from Balakrishnan B <balakrishnan.erode at gmail dot com> ---
This has nothing to do with inheritance. If the inner class is template, access
specifiers are ignored. Simpler example:
class A {
struct B1 {};
template<class T>
struct B2 {};
};
void foo() {
//A::B1 b1; //This doesn't compile (GOOD)
A::B2<int> b2; // This compiles (BAD)
}
Explorer: https://gcc.godbolt.org/z/S0YBPu
Bug is present in all versions between GCC 6.1 to trunk. GCC5 and earlier are
good.
>From gcc-bugs-return-625961-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 21:09:20 2018
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
Date: Fri, 14 Dec 2018 21:09:00 -0000
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--- Comment #9 from Vineet Gupta <vgupta at synopsys dot com> ---
Can this be stable backported to gcc-8-branch as well.
glibc folks use that branch for their regular smoke testing and without that
ARC tools don't even build.
>From gcc-bugs-return-625962-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 21:24:33 2018
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From: "jsm28 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88502] New: Inline built-in asinh, acosh, atanh for -ffast-math
Date: Fri, 14 Dec 2018 21:24:00 -0000
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Bug ID: 88502
Summary: Inline built-in asinh, acosh, atanh for -ffast-math
Product: gcc
Version: 9.0
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Target: i?86-*-*
GCC should support inline code generation for asinh, acosh, atanh functions,
under appropriate fast-math conditions.
glibc's bits/mathinline.h, for 32-bit non-SSE fast-math x86 only, has:
/* The argument range of the inline version of asinhl is slightly reduced. */
__inline_mathcodeNP (asinh, __x, \
register long double __y = __fabsl (__x); \
return (log1pl (__y * __y / (__libc_sqrtl (__y * __y + 1.0) + 1.0) + __y) \
* __sgn1l (__x)))
__inline_mathcodeNP (acosh, __x, \
return logl (__x + __libc_sqrtl (__x - 1.0) * __libc_sqrtl (__x + 1.0)))
__inline_mathcodeNP (atanh, __x, \
register long double __y = __fabsl (__x); \
return -0.5 * log1pl (-(__y + __y) / (1.0 + __y)) * __sgn1l (__x))
We're moving away from such inlines in glibc, preferring to leave it to the
compiler to inline standard functions under appropriate conditions. This
inlining probably only makes sense when logl / log1pl are themselves expanded
inline (but in principle it's otherwise generic; note this x86 code uses long
double, so avoiding reducing the argument range for built-in functions for
narrower types). (__sgn1l is another inline function, copying the sign of x to
the value 1.0L.)
>From gcc-bugs-return-625963-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 21:39:27 2018
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From: "petschy at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88503] New: 'invalid static_cast' error message could be more helpful
Date: Fri, 14 Dec 2018 21:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88503
Bug ID: 88503
Summary: 'invalid static_cast' error message could be more
helpful
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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class Parent;
class Derived;
Derived* foo(Parent* p)
{
return static_cast<Derived*>(p);
}
$ g++-9.0.0 -Wall -Wextra -c 20181214-fwddecl_vs_static_cast.cpp
20181214-fwddecl_vs_static_cast.cpp: In function ‘Derived* foo(Parent*)’:
20181214-fwddecl_vs_static_cast.cpp:6:32: error: invalid static_cast from type
‘Parent*’ to type ‘Derived*’
6 | return static_cast<Derived*>(p);
| ^
Now imagine that your project is somewhat more complex than the above example,
and Derived derives from Parent. You know it, you are used to it. However, some
code needs only the forward declarations, at other places the full definition
is needed.
When I bumped into this error, it caused me quite some time to figure out what
is going on. I double/triple/quad checked the names of the classes, no typo,
yet the error. It turned out of course that only the forward declarations were
available in that TU.
It would be really useful if the error message was a bit more verbose,
mentioning the fact if either types were forward declared, and if no
parent-child relationship info is available.
>From gcc-bugs-return-625964-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 21:46:31 2018
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Subject: [Bug c++/88501] Improve suggested alternative to be closer to typo
Date: Fri, 14 Dec 2018 21:46:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-12-14
Assignee|unassigned at gcc dot gnu.org |dmalcolm at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Confirmed. "string" vs "stting" has edit distance of 1, closer than "stdin".
I think the issue here is that it's not considering names that would be found
via using-directives. I have a work-in-progress patch to do so, which makes it
successfully suggest "string" for this case.
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Subject: [Bug c++/87814] [9 Regression] ICE in in tsubst_copy, at cp/pt.c:15962 with range-v3
Date: Fri, 14 Dec 2018 21:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87814
--- Comment #8 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Author: aoliva
Date: Fri Dec 14 21:57:07 2018
New Revision: 267155
URL: https://gcc.gnu.org/viewcvs?rev=267155&root=gcc&view=rev
Log:
[PR c++/87814] undefer deferred noexcept on tsubst if request
tsubst_expr and tsubst_copy_and_build are not expected to handle
DEFERRED_NOEXCEPT exprs, but if tsubst_exception_specification takes a
DEFERRED_NOEXCEPT expr with !defer_ok, it just passes the expr on for
tsubst_copy_and_build to barf.
This patch arranges for tsubst_exception_specification to combine the
incoming args with those already stored in a DEFERRED_NOEXCEPT, and
then substitute them into the pattern, when retaining a deferred
noexcept is unacceptable.
for gcc/cp/ChangeLog
PR c++/87814
* pt.c (tsubst_exception_specification): Handle
DEFERRED_NOEXCEPT with !defer_ok.
for gcc/testsuite/ChangeLog
PR c++/87814
* g++.dg/cpp1z/pr87814.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/pr87814.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug web/79738] Documentation for __attribute__((const)) slightly misleading
Date: Fri, 14 Dec 2018 22:17:00 -0000
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Dec 14 22:16:43 2018
New Revision: 267156
URL: https://gcc.gnu.org/viewcvs?rev=267156&root=gcc&view=rev
Log:
PR 79738 - Documentation for __attribute__((const)) slightly misleading
gcc/ChangeLog:
* doc/extend.texi (attribute const, pure): Clarify.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/extend.texi
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Subject: [Bug c++/88504] New: Inconsistent error message notes when using forward-declared type as value
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Bug ID: 88504
Summary: Inconsistent error message notes when using
forward-declared type as value
Product: gcc
Version: 9.0
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struct Foo;
struct Bar
{
Bar(Foo f_) :
m_foo(f_)
{
}
Foo m_foo;
};
Foo baz1()
{
}
void baz2(Foo f_)
{
}
void baz3()
{
Foo foo;
}
Foo g_foo;
$ g++-9.0.0 -Wall -Wextra -c 20181214-fwddecl_value.cpp
20181214-fwddecl_value.cpp:10:6: error: field ‘m_foo’ has incomplete type ‘Foo’
10 | Foo m_foo;
| ^~~~~
20181214-fwddecl_value.cpp:1:8: note: forward declaration of ‘struct Foo’
1 | struct Foo;
| ^~~
20181214-fwddecl_value.cpp:5:10: error: ‘f_’ has incomplete type
5 | Bar(Foo f_) :
| ~~~~^~
20181214-fwddecl_value.cpp:1:8: note: forward declaration of ‘struct Foo’
1 | struct Foo;
| ^~~
20181214-fwddecl_value.cpp:13:10: error: return type ‘struct Foo’ is incomplete
13 | Foo baz1()
| ^
20181214-fwddecl_value.cpp:17:15: error: ‘f_’ has incomplete type
17 | void baz2(Foo f_)
| ~~~~^~
20181214-fwddecl_value.cpp:1:8: note: forward declaration of ‘struct Foo’
1 | struct Foo;
| ^~~
20181214-fwddecl_value.cpp: In function ‘void baz2(Foo)’:
20181214-fwddecl_value.cpp:17:15: warning: unused parameter ‘f_’
[-Wunused-parameter]
17 | void baz2(Foo f_)
| ~~~~^~
20181214-fwddecl_value.cpp: In function ‘void baz3()’:
20181214-fwddecl_value.cpp:23:6: error: aggregate ‘Foo foo’ has incomplete type
and cannot be defined
23 | Foo foo;
| ^~~
20181214-fwddecl_value.cpp: At global scope:
20181214-fwddecl_value.cpp:26:5: error: aggregate ‘Foo g_foo’ has incomplete
type and cannot be defined
26 | Foo g_foo;
| ^~~~~
Most messages contain the note where the forward decl occured, but some don't:
- returning from baz1()
- local variable 'foo' in baz3()
- global variable 'g_foo'
Mentioning it everywhere would be helpful.
Quite a minor issue, but the wording of the error messages also varies
somewhat:
- inside the class: field ‘m_foo’ has incomplete type ‘Foo’
- as fn param, the name of the type is omitted : ‘f_’ has incomplete type
- when returning, 'struct Foo' is mentioned: return type ‘struct Foo’ is
incomplete
- but when defining a variable, Foo is not a struct, but an aggregate:
aggregate ‘Foo foo’ has incomplete type and cannot be defined
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Subject: [Bug tree-optimization/87096] "Optimised" snprintf is not POSIX conformant
Date: Fri, 14 Dec 2018 22:38:00 -0000
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--- Comment #12 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Dec 14 22:38:08 2018
New Revision: 267157
URL: https://gcc.gnu.org/viewcvs?rev=267157&root=gcc&view=rev
Log:
PR tree-optimization/87096 - Optimised snprintf is not POSIX conformant
gcc/ChangeLog:
PR rtl-optimization/87096
* gimple-ssa-sprintf.c (sprintf_dom_walker::handle_gimple_call): Avoid
folding calls whose bound may exceed INT_MAX. Diagnose bound ranges
that exceed the limit.
gcc/testsuite/ChangeLog:
PR tree-optimization/87096
* gcc.dg/tree-ssa/builtin-snprintf-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-snprintf-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-sprintf.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/87096] "Optimised" snprintf is not POSIX conformant
Date: Fri, 14 Dec 2018 22:39:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #13 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed for GCC 9 in r267157.
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Subject: [Bug tree-optimization/88372] alloc_size attribute is ignored on function pointers
Date: Fri, 14 Dec 2018 22:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88372
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Dec 14 22:45:55 2018
New Revision: 267158
URL: https://gcc.gnu.org/viewcvs?rev=267158&root=gcc&view=rev
Log:
PR tree-optimization/88372 - alloc_size attribute is ignored on function
pointers
gcc/ChangeLog:
PR tree-optimization/88372
* calls.c (maybe_warn_alloc_args_overflow): Handle function pointers.
* tree-object-size.c (alloc_object_size): Same. Simplify.
* doc/extend.texi (Object Size Checking): Update.
(Other Builtins): Add __builtin_object_size.
(Common Type Attributes): Add alloc_size.
(Common Variable Attributes): Ditto.
gcc/testsuite/ChangeLog:
PR tree-optimization/88372
* gcc.dg/Walloc-size-larger-than-18.c: New test.
* gcc.dg/builtin-object-size-19.c: Same.
Added:
trunk/gcc/testsuite/gcc.dg/Walloc-size-larger-than-18.c
trunk/gcc/testsuite/gcc.dg/builtin-object-size-19.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/calls.c
trunk/gcc/doc/extend.texi
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-object-size.c
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88372] alloc_size attribute is ignored on function pointers
Date: Fri, 14 Dec 2018 22:49:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed for GCC 9 in r267158. A warning when a function without the attribute is
assigned to a pointer with it should also be implemented to help detect bugs
that this might lead to.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87436] [7/8 Regression] G++ produces >300MB .rodata section to initialize struct with big array
Date: Fri, 14 Dec 2018 23:06:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 Regression] G++ |[7/8 Regression] G++
|produces >300MB .rodata |produces >300MB .rodata
|section to initialize |section to initialize
|struct with big array |struct with big array
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/88505] New: missing -Wbuiltin-declaration-mismatch on a declaration with incompatible attributes
Date: Fri, 14 Dec 2018 23:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88505
Bug ID: 88505
Summary: missing -Wbuiltin-declaration-mismatch on a
declaration with incompatible attributes
Product: gcc
Version: 9.0
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-Wbuiltin-declaration-mismatch diagnoses declarations of built-in functions
whose type conflicts with the type of the built-in. This includes the return
type and argument types, but does not include incompatible attributes. For
example, the C11 aligned_alloc() function is declared like so:
void *aligned_alloc (size_t alignment, size_t size);
but GCC silently accepts the declarations that specify attributes in the
opposite order, and in some cases (in g() below) even relies on the conflicting
attributes to make optimization decisions.
The -Wbuiltin-declaration-mismatch warning should be enhanced to also detect
mismatches in function attributes.
$ cat u.c && gcc -O2 -S -Wall -Wextra -fdump-tree-optimized=/dev/stdout u.c
typedef __SIZE_TYPE__ size_t;
extern __attribute__ ((alloc_align (2), alloc_size (1))) void*
aligned_alloc (size_t, size_t);
size_t f (void)
{
size_t align = 16;
void *p = aligned_alloc (48, align);
return __builtin_object_size (p, 0); // bad alloc_size ignored here
}
void g (void)
{
size_t align = 32;
void *p = aligned_alloc (4, align);
if ((long)p & (align - 1)) // bad alloc_align used here
__builtin_abort ();
}
;; Function f (f, funcdef_no=0, decl_uid=1910, cgraph_uid=1, symbol_order=0)
f ()
{
<bb 2> [local count: 1073741824]:
return 16;
}
;; Function g (g, funcdef_no=1, decl_uid=1915, cgraph_uid=2, symbol_order=1)
g ()
{
<bb 2> [local count: 1073741824]:
return;
}
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Subject: [Bug rtl-optimization/88478] [9 Regression] valgrind error in cselib_record_sets
Date: Fri, 14 Dec 2018 23:17:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 14 23:17:03 2018
New Revision: 267159
URL: https://gcc.gnu.org/viewcvs?rev=267159&root=gcc&view=rev
Log:
PR rtl-optimization/88478
* cselib.c (cselib_record_sets): Move sets[i].src_elt tests
after REG_P (dest) test.
* g++.dg/opt/pr88478.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/opt/pr88478.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cselib.c
trunk/gcc/testsuite/ChangeLog
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87992] ICE in resolve_fl_variable, at fortran/resolve.c:12314
Date: Fri, 14 Dec 2018 23:20:00 -0000
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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CC| |kargl at gcc dot gnu.org
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--- Comment #1 from kargl at gcc dot gnu.org ---
Don't know if code is valid, but I have a patch that fixes
the ICE. The code compiles.
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Subject: [Bug target/88489] [9 Regression] FAIL: gcc.target/i386/avx512f-vfixupimmss-2.c execution test
Date: Fri, 14 Dec 2018 23:21:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 14 23:21:10 2018
New Revision: 267160
URL: https://gcc.gnu.org/viewcvs?rev=267160&root=gcc&view=rev
Log:
PR target/88489
* config/i386/sse.md (UNSPEC_SFIXUPIMM): New unspec enumerator.
(avx512f_sfixupimm<mode><mask_name><round_saeonly_name>): Use it
instead of UNSPEC_FIXUPIMM.
* gcc.target/i386/avx512vl-vfixupimmsd-2.c: New test.
* gcc.target/i386/avx512vl-vfixupimmss-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512vl-vfixupimmsd-2.c
trunk/gcc/testsuite/gcc.target/i386/avx512vl-vfixupimmss-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88478] [9 Regression] valgrind error in cselib_record_sets
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug target/88489] [9 Regression] FAIL: gcc.target/i386/avx512f-vfixupimmss-2.c execution test
Date: Fri, 14 Dec 2018 23:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88489
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/88506] New: missing warning assigning to a pointer with incompatible attributes
Date: Fri, 14 Dec 2018 23:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88506
Bug ID: 88506
Summary: missing warning assigning to a pointer with
incompatible attributes
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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Similar to bug 88505, GCC silently accepts assignments of addresses of
functions to pointers declared with incompatible attributes. See the test case
below.
GCC should check the attributes on pointer initialization and assignment for
compatibility and issue a warning if the destination is more restrictive than
the source.
$ cat u.c && gcc -O2 -S -Wall -Wextra -fdump-tree-optimized=/dev/stdout u.c
#include <stdlib.h>
__attribute__ ((alloc_align (2), alloc_size (1))) void*
(*paligned_alloc)(size_t, size_t) = aligned_alloc;
size_t f (void)
{
size_t align = 16;
void *p = paligned_alloc (48, align);
return __builtin_object_size (p, 0); // bad alloc_size used
}
void g (void)
{
size_t align = 32;
void *p = paligned_alloc (4, align);
if ((long)p & (align - 1)) // bad alloc_align used
__builtin_abort ();
}
;; Function f (f, funcdef_no=10, decl_uid=2495, cgraph_uid=11, symbol_order=11)
f ()
{
void * (*<T46a>) (size_t, size_t) paligned_alloc.0_1;
<bb 2> [local count: 1073741824]:
paligned_alloc.0_1 = paligned_alloc;
paligned_alloc.0_1 (48, 16);
return 48;
}
;; Function g (g, funcdef_no=11, decl_uid=2500, cgraph_uid=12, symbol_order=12)
g ()
{
void * (*<T46a>) (size_t, size_t) paligned_alloc.1_1;
<bb 2> [local count: 1073741824]:
paligned_alloc.1_1 = paligned_alloc;
paligned_alloc.1_1 (4, 32); [tail call]
return;
}
tmp$ cat u.c && /ssd/build/gcc-svn/gcc/xgcc -B /ssd/build/gcc-svn/gcc -O2 -S
-Wall -Wextra -fdump-tree-optimized=/dev/stdout u.c
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Subject: [Bug tree-optimization/88372] alloc_size attribute is ignored on function pointers
Date: Fri, 14 Dec 2018 23:31:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=88506
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Bug 88506 tracks the missing warning.
>From gcc-bugs-return-625981-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 23:49:02 2018
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Subject: [Bug c++/88501] Improve suggested alternative to be closer to typo
Date: Fri, 14 Dec 2018 23:49:00 -0000
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--- Comment #3 from Jonny Grant <jg at jguk dot org> ---
(In reply to David Malcolm from comment #2)
> Confirmed. "string" vs "stting" has edit distance of 1, closer than
> "stdin". I think the issue here is that it's not considering names that
> would be found via using-directives. I have a work-in-progress patch to do
> so, which makes it successfully suggest "string" for this case.
Great!
I wonder, for typos if a simple byte compare would be enough? Vary each char by
1 letter, or length. This starts to get complicated I know..
A few that still work
"st4ing"
"st$ing"
"st%ing"
A few that do not work (I did think gcc could output UTF-8) but it would seem
not - I'll file a separate ticket
"st!ing"
"st£ing"
string.cpp:8:7: error: stray ‘\302’ in program
st��ing buf;
^
string.cpp:8:8: error: stray ‘\243’ in program
st��ing buf;
>From gcc-bugs-return-625982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Dec 14 23:53:37 2018
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Subject: [Bug c++/88507] New: utf8 not displayed
Date: Fri, 14 Dec 2018 23:53:00 -0000
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Bug ID: 88507
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Hello
This is an typo in the word "string", just reporting as perhaps it could show £
correctly, as it does on line 10 error. Perhaps could also show the stray bytes
in hex as well? ie "0xF3C2"
$ g++ -Wall -o string string.cpp
string.cpp:8:7: error: stray ‘\302’ in program
st��ing buf;
^
string.cpp:8:8: error: stray ‘\243’ in program
st��ing buf;
^
string.cpp: In function ‘int main()’:
string.cpp:8:5: error: ‘st’ was not declared in this scope
st£ing buf;
^~
string.cpp:10:5: error: ‘buf2’ was not declared in this scope
buf2 = "£"
^~~~
// g++ -Wall -o string string.cpp
#include <string>
using namespace std;
int main()
{
st£ing buf;
buf = "£"
}
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87759] [8/9 Regression] ICE in lra_assign, at lra-assigns.c:1624, or ICE: Maximum number of LRA assignment passes is achieved (30), or compile-time hog
Date: Fri, 14 Dec 2018 23:54:00 -0000
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--- Comment #2 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
I've started to work on it. The patch will be probably ready on Monday or
Tuesday.
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
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--- Comment #10 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Sure this can be backported... But can you fill in known-to-{work,fail}
then please? Thanks.
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Subject: [Bug libstdc++/88508] New: std::bad_cast in std::basic_ostringstream<char16_t>.oss.fill()
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Bug ID: 88508
Summary: std::bad_cast in
std::basic_ostringstream<char16_t>.oss.fill()
Product: gcc
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Created attachment 45241
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45241&action=edit
Code
I am trying to add support of UTF-16 and UTF-32 in C++17 environment.
Short fragment of my code:
namespace std {
typedef basic_ostringstream<char16_t> u16ostringstream;
}
std::u16string to_hexdump_u16(const std::u16string_view &str_v) {
std::u16ostringstream oss;
oss.setf(std::ios::hex, std::ios::basefield);
oss.fill(u'0');
...
return oss.str();
}
int main() {
auto str_u16 = u"Hello, my favorite World with native UTF-16 & UTF-32
support!♥â¤â™¡";
auto str_dump_u16 = to_hexdump_u16(str_u16);
return 0;
}
I compile it via CMake with set(CMAKE_CXX_STANDARD 17)
It compiles successfully, but the bad_cast exception occurs when
"oss.fill(u'0')" is called. The internal function which throws the exception is
"__check_facet(const _Facet* __f)" in basic_ios.h.
Exception is also thrown when calling "oss << std::endl", but I think it's the
same problem.
Problem touches latest library compiled with clang (linux), gcc 8.1 (mingw-w64,
linux). The code compiles and works fine on latest MSVC compiler.
The one-file full example in attach.
>From gcc-bugs-return-625986-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 03:30:02 2018
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/84863] false-positive -Warray-bounds warning with -fsanitize-coverage=object-size
Date: Sat, 15 Dec 2018 03:30:00 -0000
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> Never use -Werror with -fsanitize=*, those really do cause new warnings
> because the code intentionally is less optimized and the runtime check
> themselves prevent further optimizations, so warnings that depend on
> optimizations can't work properly.
Maybe gcc should explicitly forbid the 2 of them being combined and error out
in the option-handling part of the driver instead.
>From gcc-bugs-return-625987-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 03:37:59 2018
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Subject: [Bug c++/88395] ICE: Segmentation fault signal terminated program cc1plus, with -std=c++2a -fconcepts
Date: Sat, 15 Dec 2018 03:37:00 -0000
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--- Comment #6 from Nicholas Krause <xerofoify at gmail dot com> ---
Created attachment 45242
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45242&action=edit
Proposed Bug Fix
>From gcc-bugs-return-625988-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 03:38:52 2018
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Subject: [Bug c/78352] GCC lacks support for the Apple "blocks" extension to the C family of languages
Date: Sat, 15 Dec 2018 03:38:00 -0000
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--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #5)
> (In reply to René J.V. Bertin from comment #4)
> > Any news on this front?
>
> Last I heard from Iain he was still having to deal with water damage to his
> office...
He seems to be back now, but dealing with lower-hanging fruit in his backlog at
the moment. (I really wish I knew as much about the Darwin port as he does so I
could help reduce its "bus factor", but unfortunately I haven't been able to
focus hard enough to sit down and really learn it)
>From gcc-bugs-return-625989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 03:39:15 2018
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Subject: [Bug c++/88395] ICE: Segmentation fault signal terminated program cc1plus, with -std=c++2a -fconcepts
Date: Sat, 15 Dec 2018 03:39:00 -0000
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--- Comment #7 from Nicholas Krause <xerofoify at gmail dot com> ---
(In reply to Nicholas Krause from comment #6)
> Created attachment 45242 [details]
> Proposed Bug Fix
This is my proposed fix after tracing it and reading it carefully seems that
passing the NULL_TREE in rather than the correct decl tree of concepts is
causing the bug. If this is correct I will just run the gcc test suite and post
to the list.
>From gcc-bugs-return-625990-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 03:43:10 2018
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From: "rafael at espindo dot la" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88509] New: Missing optimization of tls initialization
Date: Sat, 15 Dec 2018 03:43:00 -0000
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Bug ID: 88509
Summary: Missing optimization of tls initialization
Product: gcc
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Given
struct foo {
foo();
};
static thread_local foo bar;
foo *f() { return &bar; }
foo *g() {
static thread_local foo *bar_ptr;
if (bar_ptr == nullptr) {
[&]() { bar_ptr = &bar; }();
}
return bar_ptr;
}
GCC has to make sure bar is only initialized once. For the function f it
produces
pushq %rbx
cmpb $0, %fs:__tls_guard@tpoff
movq %fs:0, %rbx
je .L6
leaq _ZL3bar@tpoff(%rbx), %rax
popq %rbx
ret
.L6:
<do_the_initialization>
for g, the common code path is somewhat simpler:
movq %fs:_ZZ1gvE7bar_ptr@tpoff, %rax
testq %rax, %rax
je .L15
ret
.L15:
<do_the_initialization>
The optimization is to use the a pointer to the object as a guard instead of
using a boolean. As far as I can tell this can be applied to any static tls
variable (where the ABI is not a problem).
>From gcc-bugs-return-625991-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 03:46:12 2018
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Subject: [Bug debug/49167] dwarf marker for function return instruction
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
Alexandre, did you just get assigned this because that's what happens with all
bugs with the "debug" component, or are you actually working on it?
>From gcc-bugs-return-625992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 03:58:09 2018
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Subject: [Bug c/87310] -Wc90-c99-compat does not warn about bool usage
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=45780
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
I got this confused with bug 45780 for a second but that's actually something
different. Still putting it under "See Also" though, as a "just-in-case" for
the future...
>From gcc-bugs-return-625993-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 04:38:28 2018
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From: "husseydevin at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88510] New: GCC generates inefficient U64x2 scalar multiply for NEON32
Date: Sat, 15 Dec 2018 04:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88510
Bug ID: 88510
Summary: GCC generates inefficient U64x2 scalar multiply for
NEON32
Product: gcc
Version: 8.2.0
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Note: I use these typedefs here for brevity.
typedef uint64x2_t U64x2;
typedef uint32x2_t U32x2;
typedef uint32x2x2_t U32x2x2;
typedef uint32x4_t U32x4;
GCC and Clang both have issues with this code on ARMv7a NEON, and will switch
to scalar:
U64x2 multiply(U64x2 top, U64x2 bot)
{
return top * bot;
}
gcc-8 -mfloat-abi=hard -mfpu=neon -O3 -S -march=armv7-a
multiply:
push {r4, r5, r6, r7, lr}
sub sp, sp, #20
vmov r0, r1, d0 @ v2di
vmov r6, r7, d2 @ v2di
vmov r2, r3, d1 @ v2di
vmov r4, r5, d3 @ v2di
mul lr, r0, r7
mla lr, r6, r1, lr
mul ip, r2, r5
umull r0, r1, r0, r6
mla ip, r4, r3, ip
add r1, lr, r1
umull r2, r3, r2, r4
strd r0, [sp]
add r3, ip, r3
strd r2, [sp, #8]
vld1.64 {d0-d1}, [sp:64]
add sp, sp, #20
pop {r4, r5, r6, r7, pc}
Clang's is worse, and you can compare the output, as well as the i386 SSE4.1
code here: https://godbolt.org/z/35owtL
Related LLVM bug 39967: https://bugs.llvm.org/show_bug.cgi?id=39967
I started the discussion in LLVM, as it had the worse problem, and we have come
up with a few options for faster code that does not require scalar. You can
also find the benchmark file (with outdated tests) and results results. They
are from Clang, but since they use intrinsics, results are similar.
While we don't have vmulq_u64, we do have faster ways to multiply without going
scalar.
I have benchmarked the code, and have found this option, based on the code
emitted for SSE4.1:
U64x2 goodmul_sse(U64x2 top, U64x2 bot)
{
U32x2 topHi = vshrn_n_u64(top, 32); // U32x2 topHi = top >> 32;
U32x2 topLo = vmovn_u64(top); // U32x2 topLo = top & 0xFFFFFFFF;
U32x2 botHi = vshrn_n_u64(bot, 32); // U32x2 botHi = bot >> 32;
U32x2 botLo = vmovn_u64(bot); // U32x2 botLo = bot & 0xFFFFFFFF;
U64x2 ret64 = vmull_u32(topHi, botLo); // U64x2 ret64 = (U64x2)topHi *
(U64x2)botLo;
ret64 = vmlal_u32(ret64, topLo, botHi); // ret64 += (U64x2)topLo *
(U64x2)botHi;
ret64 = vshlq_n_u64(ret64, 32); // ret64 <<= 32;
ret64 = vmlal_u32(ret64, topLo, botLo); // ret64 += (U64x2)topLo *
(U64x2)botLo;
return ret64;
}
If GCC can figure out how to interleave one or two of the operands, for
example, changing this:
U64x2 inp1 = vld1q_u64(p);
U64x2 inp2 = vld1q_u64(q);
vec = goodmul_sse(inp1, inp2);
to this (if it knows inp1 and/or inp2 are only used for multiplication):
U32x2x2 inp1 = vld2_u32(p);
U32x2x2 inp2 = vld2_u32(q);
vec = goodmul_sse_interleaved(inp1, inp2)
then we can do this and save 4 cycles:
U64x2 goodmul_sse_interleaved(const U32x2x2 top, const U32x2x2 bot)
{
U64x2 ret64 = vmull_u32(top.val[1], bot.val[0]); // U64x2 ret64 =
(U64x2)topHi * (U64x2)botLo;
ret64 = vmlal_u32(ret64, top.val[0], bot.val[1]); // ret64 +=
(U64x2)topLo * (U64x2)botHi;
ret64 = vshlq_n_u64(ret64, 32); // ret64 <<= 32;
ret64 = vmlal_u32(ret64, top.val[0], bot.val[0]); // ret64 +=
(U64x2)topLo * (U64x2)botLo;
return ret64;
}
Another user posted this (typos fixed).
It seems to use two fewer cycles when not interleaved (not 100% sure about it),
but two cycles slower when it is fully interleaved.
U64x2 twomul(U64x2 top, U64x2 bot)
{
U32x2 top_low = vmovn_u64(top);
U32x2 bot_low = vmovn_u64(bot);
U32x4 top_re = vreinterpretq_u32_u64(top);
U32x4 bot_re = vrev64q_u32(vreinterpretq_u32_u64(bot));
U32x4 prod = vmulq_u32(top_re, bot_re);
U64x2 paired = vpaddlq_u32(prod);
U64x2 shifted = vshlq_n_u64(paired, 32);
return vmlal_u32(shifted, top_low, bot_low);
}
Either one of these is faster than scalar.
>From gcc-bugs-return-625994-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 04:55:30 2018
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Subject: [Bug c++/88509] Missing optimization of tls initialization
Date: Sat, 15 Dec 2018 04:55:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>As far as I can tell this can be applied to any static tls variable
Only in functions which have non-vague linkage. static varaibles in inline
functions have to have the same ABI across TUs and there might have some in
already compiled code ...
>From gcc-bugs-return-625995-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 05:28:31 2018
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
Date: Sat, 15 Dec 2018 05:28:00 -0000
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--- Comment #11 from Vineet Gupta <vgupta at synopsys dot com> ---
Sure, but how can I ? if i click the "known to work" field it takes me to help.
The issue certainly with gcc-8-branch for ARC and presumably also with
tip/trunk.
>From gcc-bugs-return-625996-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 05:36:56 2018
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Subject: [Bug target/88498] [9 Regression] FAIL: gcc.target/i386/avx512vl-pr79299-1.c (internal compiler error)
Date: Sat, 15 Dec 2018 05:36:00 -0000
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--- Comment #3 from Terry Guo <xuepeng.guo at intel dot com> ---
I just tried and both of failures are gone with Jakub's patch.
>From gcc-bugs-return-625997-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 05:51:55 2018
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Subject: [Bug c++/88261] [9 Regression] ICE: verify_gimple failed (error: non-trivial conversion at assignment)
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--- Comment #10 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
Hmm, there are a few loose ends, where there is simply no decl.
For instance in this example:
/* PR c/5597 */
/* { dg-do compile } */
/* { dg-options "" } */
/* Verify that GCC forbids non-static initialization of
flexible array members. */
struct str { int len; char s[]; };
struct str a = { 2, "a" };
void foo()
{
static struct str d = (struct str) { 2, "d" }; /* { dg-error
"(non-static)|(near initialization)" } */
static struct str e = (struct str) { d.len, "e" }; /* { dg-error
"(non-static)|(initialization)" } */
}
$ g++ -S array-6.c
array-6.c:14:47: error: non-static initialization of a flexible array member
14 | static struct str d = (struct str) { 2, "d" }; /* { dg-error
"(non-static)|(near initialization)" } */
| ^
array-6.c:15:51: error: non-static initialization of a flexible array member
15 | static struct str e = (struct str) { d.len, "e" }; /* { dg-error
"(non-static)|(initialization)" } */
| ^
the patch prints an error, but digest_init_r is called from
finish_compound_literal:
2830 compound_literal = digest_init_flags (type, compound_literal,
LOOKUP_NORMAL,
2831 complain, NULL_TREE);
So here it is impossible to tell which decl is going to be initialized,
because this is called drectly from the parser (cp_parser_postfix_expression).
However the C-FE does also not have a decl here, and I think I cannot do
much about that:
$ gcc -S array-6.c
array-6.c: In function 'foo':
array-6.c:14:43: error: non-static initialization of a flexible array member
14 | static struct str d = (struct str) { 2, "d" }; /* { dg-error
"(non-static)|(near initialization)" } */
| ^~~
array-6.c:14:43: note: (near initialization for '(anonymous)')
array-6.c:15:47: error: non-static initialization of a flexible array member
15 | static struct str e = (struct str) { d.len, "e" }; /* { dg-error
"(non-static)|(initialization)" } */
| ^~~
array-6.c:15:47: note: (near initialization for '(anonymous)')
array-6.c:15:25: error: initializer element is not constant
15 | static struct str e = (struct str) { d.len, "e" }; /* { dg-error
"(non-static)|(initialization)" } */
| ^
>From gcc-bugs-return-625998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 08:41:54 2018
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Subject: [Bug c/78352] GCC lacks support for the Apple "blocks" extension to the C family of languages
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--- Comment #7 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #6)
> (In reply to Eric Gallager from comment #5)
> > (In reply to René J.V. Bertin from comment #4)
> > > Any news on this front?
> >
> > Last I heard from Iain he was still having to deal with water damage to his
> > office...
>
> He seems to be back now, but dealing with lower-hanging fruit in his backlog
> at the moment.
The focus is on wrong-code and regression bugs at the moment (not necessarily
lowest-hanging fruit)
Apropos this enhancement:
1) My last set of working patches was against 4.9/5 - so they need to be
forward-ported.
2) There is a design ;-) the reason this is assigned...
3) This would involve changes to c-family FE and some ME additions, so you can
be sure it is not relevant until 10 stage 1 at the earliest.
> (I really wish I knew as much about the Darwin port as he
> does so I could help reduce its "bus factor", but unfortunately I haven't
> been able to focus hard enough to sit down and really learn it)
There is a lot of testsuite noise some of which probably *is* low-hanging fruit
(places where there are Linux-isms in the test cases which simply need the
Darwin equivalent) - Darwin folks *you* can test/analyse/categorise these,
whereas the folks without a Darwin box cannot - so please go at it! JFTR, I
started with testsuite fixes ..
>From gcc-bugs-return-625999-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 09:08:18 2018
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Subject: [Bug c++/84644] internal compiler error: in warn_misplaced_attr_for_class_type, at cp/decl.c:4718
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--- Comment #4 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Sat Dec 15 09:07:38 2018
New Revision: 267165
URL: https://gcc.gnu.org/viewcvs?rev=267165&root=gcc&view=rev
Log:
/cp
2018-12-15 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/84644
* decl.c (check_tag_decl): A decltype with no declarator
doesn't declare anything.
/testsuite
2018-12-15 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/84644
* g++.dg/cpp0x/decltype68.C: New.
* g++.dg/cpp0x/decltype-33838.C: Adjust.
* g++.dg/template/spec32.C: Likewise.
* g++.dg/template/ttp22.C: Likewise.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/decltype68.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/decltype-33838.C
trunk/gcc/testsuite/g++.dg/template/spec32.C
trunk/gcc/testsuite/g++.dg/template/ttp22.C
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Subject: [Bug c++/84644] internal compiler error: in warn_misplaced_attr_for_class_type, at cp/decl.c:4718
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed in trunk.
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Subject: [Bug c++/88509] Missing optimization of tls initialization
Date: Sat, 15 Dec 2018 09:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88509
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I must say I don't understand your suggestion. bar is not a pointer and its
address is non-NULL no matter whether it has been already initialized or not.
What kind of assembly you'd like to see for f?
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Subject: [Bug target/88502] Inline built-in asinh, acosh, atanh for -ffast-math
Date: Sat, 15 Dec 2018 10:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88502
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Joseph S. Myers from comment #0)
> GCC should support inline code generation for asinh, acosh, atanh functions,
> under appropriate fast-math conditions.
>
> glibc's bits/mathinline.h, for 32-bit non-SSE fast-math x86 only, has:
>
> /* The argument range of the inline version of asinhl is slightly reduced.
> */
> __inline_mathcodeNP (asinh, __x, \
> register long double __y = __fabsl (__x); \
> return (log1pl (__y * __y / (__libc_sqrtl (__y * __y + 1.0) + 1.0) + __y)
> \
> * __sgn1l (__x)))
>
> __inline_mathcodeNP (acosh, __x, \
> return logl (__x + __libc_sqrtl (__x - 1.0) * __libc_sqrtl (__x + 1.0)))
>
> __inline_mathcodeNP (atanh, __x, \
> register long double __y = __fabsl (__x); \
> return -0.5 * log1pl (-(__y + __y) / (1.0 + __y)) * __sgn1l (__x))
>
> We're moving away from such inlines in glibc, preferring to leave it to the
> compiler to inline standard functions under appropriate conditions. This
> inlining probably only makes sense when logl / log1pl are themselves
> expanded inline (but in principle it's otherwise generic; note this x86 code
> uses long double, so avoiding reducing the argument range for built-in
> functions for narrower types). (__sgn1l is another inline function, copying
> the sign of x to the value 1.0L.)
Can you please advise, which would be appropirate conditions? I think that they
should be similar to hypot conditions - flag_finite_math_only and
flag_unsafe_math_optimizations. The x87 expansion is valid for float and double
functions, we should leave out long double variant, even with
flag_unsafe_math_optimizations.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Sat, 15 Dec 2018 11:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88464
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 15 11:02:28 2018
New Revision: 267169
URL: https://gcc.gnu.org/viewcvs?rev=267169&root=gcc&view=rev
Log:
PR tree-optimization/88464
PR target/88498
* tree-vect-stmts.c (vect_build_gather_load_calls): For NARROWING
and mask with integral masktype, don't try to permute mask vectors,
instead emit VEC_UNPACK_{LO,HI}_EXPR. Fix up NOP_EXPR operand.
(vectorizable_store): Handle masked scatters with decl and integral
mask type.
(permute_vec_elements): Allow scalar_dest to be NULL.
* config/i386/i386.c (ix86_get_builtin)
<case IX86_BUILTIN_GATHER3ALTDIV16SF>: Use lowpart_subreg for masks.
<case IX86_BUILTIN_GATHER3ALTDIV8SF>: Don't assume mask and src have
to be the same.
* gcc.target/i386/avx512f-pr88462-1.c: Rename to ...
* gcc.target/i386/avx512f-pr88464-1.c: ... this. Fix up PR number.
Expect 4 vectorized loops instead of 3.
(f4): New function.
* gcc.target/i386/avx512f-pr88462-2.c: Rename to ...
* gcc.target/i386/avx512f-pr88464-2.c: ... this. Fix up PR number
and #include.
(avx512f_test): Prepare arguments for f4 and check the results.
* gcc.target/i386/avx512f-pr88464-3.c: New test.
* gcc.target/i386/avx512f-pr88464-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88464-1.c
- copied, changed from r267168,
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88462-1.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88464-2.c
- copied, changed from r267168,
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88462-2.c
Removed:
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88462-1.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88462-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-stmts.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88498] [9 Regression] FAIL: gcc.target/i386/avx512vl-pr79299-1.c (internal compiler error)
Date: Sat, 15 Dec 2018 11:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88498
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 15 11:02:28 2018
New Revision: 267169
URL: https://gcc.gnu.org/viewcvs?rev=267169&root=gcc&view=rev
Log:
PR tree-optimization/88464
PR target/88498
* tree-vect-stmts.c (vect_build_gather_load_calls): For NARROWING
and mask with integral masktype, don't try to permute mask vectors,
instead emit VEC_UNPACK_{LO,HI}_EXPR. Fix up NOP_EXPR operand.
(vectorizable_store): Handle masked scatters with decl and integral
mask type.
(permute_vec_elements): Allow scalar_dest to be NULL.
* config/i386/i386.c (ix86_get_builtin)
<case IX86_BUILTIN_GATHER3ALTDIV16SF>: Use lowpart_subreg for masks.
<case IX86_BUILTIN_GATHER3ALTDIV8SF>: Don't assume mask and src have
to be the same.
* gcc.target/i386/avx512f-pr88462-1.c: Rename to ...
* gcc.target/i386/avx512f-pr88464-1.c: ... this. Fix up PR number.
Expect 4 vectorized loops instead of 3.
(f4): New function.
* gcc.target/i386/avx512f-pr88462-2.c: Rename to ...
* gcc.target/i386/avx512f-pr88464-2.c: ... this. Fix up PR number
and #include.
(avx512f_test): Prepare arguments for f4 and check the results.
* gcc.target/i386/avx512f-pr88464-3.c: New test.
* gcc.target/i386/avx512f-pr88464-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88464-1.c
- copied, changed from r267168,
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88462-1.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88464-2.c
- copied, changed from r267168,
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88462-2.c
Removed:
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88462-1.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88462-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-stmts.c
>From gcc-bugs-return-626006-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 11:05:21 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Sat, 15 Dec 2018 11:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88464
--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 15 11:04:41 2018
New Revision: 267170
URL: https://gcc.gnu.org/viewcvs?rev=267170&root=gcc&view=rev
Log:
PR tree-optimization/88464
PR target/88498
* tree-vect-stmts.c (vect_build_gather_load_calls): For NARROWING
and mask with integral masktype, don't try to permute mask vectors,
instead emit VEC_UNPACK_{LO,HI}_EXPR. Fix up NOP_EXPR operand.
(vectorizable_store): Handle masked scatters with decl and integral
mask type.
(permute_vec_elements): Allow scalar_dest to be NULL.
* config/i386/i386.c (ix86_get_builtin)
<case IX86_BUILTIN_GATHER3ALTDIV16SF>: Use lowpart_subreg for masks.
<case IX86_BUILTIN_GATHER3ALTDIV8SF>: Don't assume mask and src have
to be the same.
* gcc.target/i386/avx512f-pr88462-1.c: Rename to ...
* gcc.target/i386/avx512f-pr88464-1.c: ... this. Fix up PR number.
Expect 4 vectorized loops instead of 3.
(f4): New function.
* gcc.target/i386/avx512f-pr88462-2.c: Rename to ...
* gcc.target/i386/avx512f-pr88464-2.c: ... this. Fix up PR number
and #include.
(avx512f_test): Prepare arguments for f4 and check the results.
* gcc.target/i386/avx512f-pr88464-3.c: New test.
* gcc.target/i386/avx512f-pr88464-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88464-3.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88464-4.c
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Subject: [Bug target/88498] [9 Regression] FAIL: gcc.target/i386/avx512vl-pr79299-1.c (internal compiler error)
Date: Sat, 15 Dec 2018 11:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88498
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 15 11:04:41 2018
New Revision: 267170
URL: https://gcc.gnu.org/viewcvs?rev=267170&root=gcc&view=rev
Log:
PR tree-optimization/88464
PR target/88498
* tree-vect-stmts.c (vect_build_gather_load_calls): For NARROWING
and mask with integral masktype, don't try to permute mask vectors,
instead emit VEC_UNPACK_{LO,HI}_EXPR. Fix up NOP_EXPR operand.
(vectorizable_store): Handle masked scatters with decl and integral
mask type.
(permute_vec_elements): Allow scalar_dest to be NULL.
* config/i386/i386.c (ix86_get_builtin)
<case IX86_BUILTIN_GATHER3ALTDIV16SF>: Use lowpart_subreg for masks.
<case IX86_BUILTIN_GATHER3ALTDIV8SF>: Don't assume mask and src have
to be the same.
* gcc.target/i386/avx512f-pr88462-1.c: Rename to ...
* gcc.target/i386/avx512f-pr88464-1.c: ... this. Fix up PR number.
Expect 4 vectorized loops instead of 3.
(f4): New function.
* gcc.target/i386/avx512f-pr88462-2.c: Rename to ...
* gcc.target/i386/avx512f-pr88464-2.c: ... this. Fix up PR number
and #include.
(avx512f_test): Prepare arguments for f4 and check the results.
* gcc.target/i386/avx512f-pr88464-3.c: New test.
* gcc.target/i386/avx512f-pr88464-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88464-3.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88464-4.c
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Subject: [Bug tree-optimization/53947] [meta-bug] vectorizer missed-optimizations
Date: Sat, 15 Dec 2018 11:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
Bug 53947 depends on bug 88464, which changed state.
Bug 88464 Summary: AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88464
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Sat, 15 Dec 2018 11:23:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Should be fixed now.
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Subject: [Bug target/88498] [9 Regression] FAIL: gcc.target/i386/avx512vl-pr79299-1.c (internal compiler error)
Date: Sat, 15 Dec 2018 11:24:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Should be fixed now.
>From gcc-bugs-return-626010-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 11:36:01 2018
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/88009] [9 Regression] ICE in find_intrinsic_vtab, at fortran/class.c:2761
Date: Sat, 15 Dec 2018 11:36:00 -0000
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janus at gcc dot gnu.org changed:
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--- Comment #2 from janus at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #1)
> Probably r264350 (pr88009).
Right, I'm to blame here. But: I have a patch :)
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
Date: Sat, 15 Dec 2018 12:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88001
--- Comment #12 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Sat Dec 15 12:05:08 2018
New Revision: 267171
URL: https://gcc.gnu.org/viewcvs?rev=267171&root=gcc&view=rev
Log:
Backport from trunk
2018-12-14 Segher Boessenkool <segher@kernel.crashing.org>
PR rtl-optimization/88001
* function.c (match_asm_constraints_1): Don't invalidly share RTL.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/function.c
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
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--- Comment #13 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Sat Dec 15 12:07:42 2018
New Revision: 267172
URL: https://gcc.gnu.org/viewcvs?rev=267172&root=gcc&view=rev
Log:
Backport from trunk
2018-12-14 Segher Boessenkool <segher@kernel.crashing.org>
PR rtl-optimization/88001
* function.c (match_asm_constraints_1): Don't invalidly share RTL.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/function.c
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Subject: [Bug rtl-optimization/88001] ASMCONS cannot handle properly UNSPEC(CONST)
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #14 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Ah, you don't have permission to edit the field. I backported it to GCC 8
and GCC 7; closing now.
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Subject: [Bug target/88502] Inline built-in asinh, acosh, atanh for -ffast-math
Date: Sat, 15 Dec 2018 13:43:00 -0000
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--- Comment #2 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
I think flag_unsafe_math_optimizations is generally appropriate for these;
asinh needs flag_finite_math_only as well (because an Inf argument would result
in Inf / Inf) but neither of the others should.
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From: "stephen at soliday dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88511] New: passing allocatable character through two levels of procedure calls fails
Date: Sat, 15 Dec 2018 16:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88511
Bug ID: 88511
Summary: passing allocatable character through two levels of
procedure calls fails
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Reporter: stephen at soliday dot com
Target Milestone: ---
Please see the thread that I started in Stack overflow. Several respondents
have reproduced this problem in 8.2.1 and 9.0.0. In those threads there is
reduced version of code that also reproduces the bug.
I am experiencing an allocation failure when using allocatable character
strings as optional arguments. The problem only occurs when I call through two
levels of procedures. In my actual code ***call get_level1()*** (see below)
represents a call to a list data structure and ***call get_level2()***
represents the list calling the same type of accessor function on one of its
records. I have stripped down an example to the bare minimum that adequately
reproduces the problem.
In the code below when I call ***get_level2*** directly the expected character
string is returned through the optional argument. When I call ***get_level1***
which in turn calls ***get_level2*** allocation of the optional dummy argument
fails. Using gdb I find the allocation attempt to create a character*1635...
when it gets back to the actual argument is obviously has an integer overflow
because it thinks the allocation is character*-283635612...
My actual code has many optional arguments not just one. As a simple example I
added an optional integer argument. This time instead of a segmentation fault I
get a null string.
In the second example the integer argument works regardless of using the
character argument. (I would expect this since no dynamic allocation is being
performed) The integer's presence has no effect on the character. I have also
tried changing the **intent** to (inout). This does not change the behavior,
though I did not expect it to. [I believe that *intent(out)* causes the actual
argument to deallocate first, and *intent(inout)* retains the actual argument's
allocation state]
call get_level1( NUM=n ) ! works
call get_level1( NUM=n, TEXT=words ) ! fails
call get_level1( TEXT=words ) ! fails
my compile cmd is:
gfortran -Wall -g -std=f2008ts stest1.f08 -o stest
**Environment**
Linux 4.15.0-42-generic #45-Ubuntu SMP x86_64 GNU/Linux
GNU Fortran (Ubuntu 7.3.0-27ubuntu1~18.04) 7.3.0
**Example with one optional argument**
module stest1
implicit none
character(:), allocatable :: data
contains
subroutine get_level2( TEXT )
implicit none
character(:), optional, allocatable, intent(out) :: TEXT
if ( PRESENT( TEXT ) ) then
TEXT = 'Prefix: ' // data // ' :postfix'
end if
end subroutine get_level2
subroutine get_level1( TEXT )
implicit none
character(:), optional, allocatable, intent(out) :: TEXT
call get_level2( TEXT )
end subroutine get_level1
end module stest1
program main
use stest1
implicit none
character(:), allocatable :: words
data = 'Hello Doctor'
call get_level1( words )
write(*,100) words
100 format( 'words = [',A,']' )
end program main
**Example with two optional arguments**
module stest2
implicit none
character(:), allocatable :: data
integer :: count
contains
subroutine get_level2( TEXT, NUM )
implicit none
character(:), optional, allocatable, intent(out) :: TEXT
integer, optional, intent(out) :: NUM
if ( PRESENT( TEXT ) ) then
TEXT = 'Prefix: ' // data // ' :postfix'
end if
if ( PRESENT( NUM ) ) then
NUM = count
end if
end subroutine get_level2
subroutine get_level1( TEXT, NUM )
implicit none
character(:), optional, allocatable, intent(out) :: TEXT
integer, optional, intent(out) :: NUM
call get_level2( NUM=NUM, TEXT=TEXT )
end subroutine get_level1
end module stest2
program main
use stest2
implicit none
character(:), allocatable :: words
integer :: n
count = 42
data = 'Hello Doctor'
call get_level1( TEXT=words )
write(*,100) words
write(*,110) n
100 format( 'words = [',A,']' )
110 format( 'N = [',I0,']' )
end program main
>From gcc-bugs-return-626016-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 16:46:05 2018
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From: "stephen at soliday dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88511] passing allocatable character through two levels of procedure calls fails
Date: Sat, 15 Dec 2018 16:46:00 -0000
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--- Comment #1 from Stephen Soliday <stephen at soliday dot com> ---
One of the respondents in Stack overflow posted this reduced version of my code
that also reproduces the segmentation fault.
program main
implicit none
character(:), allocatable :: txt
call sub1(txt)
print *, "main ", len(txt), txt ! prints: main 0 (or throws segfault)
contains
subroutine sub1(txt)
character(:), allocatable, optional, intent(out) :: txt
call sub2(txt)
print *, "sub1 ", len(txt), txt ! prints: sub1 0 (or throws segfault)
end subroutine sub1
subroutine sub2(txt)
character(:), allocatable, optional, intent(out) :: txt
if(present(txt)) txt = "message"
print *, "sub2 ", len(txt), txt ! prints: sub2 7 message
end subroutine sub2
end program main
>From gcc-bugs-return-626017-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 17:01:15 2018
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From: "rafael at espindo dot la" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88509] Missing optimization of tls initialization
Date: Sat, 15 Dec 2018 17:01:00 -0000
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--- Comment #3 from Rafael Avila de Espindola <rafael at espindo dot la> ---
(In reply to Jakub Jelinek from comment #2)
> I must say I don't understand your suggestion. bar is not a pointer and its
> address is non-NULL no matter whether it has been already initialized or not.
> What kind of assembly you'd like to see for f?
Bar is not a pointer, but a guard variable for bar can be. It is initially null
and is set to bar's address once bar is initialized.
I think the assembly for f could be:
_Z1fv:
movq %fs:__guard_for_bar@tpoff, %rax
testq %rax, %rax
je .L15
ret
.L15:
pushq %rbx
movq %fs:0, %rbx
leaq _ZL3bar@tpoff(%rbx), %rdi
call _ZN3fooC1Ev
leaq _ZL3bar@tpoff(%rbx), %rax
movq %rax, %fs:__guard_for_bar@tpoff
popq %rbx
ret
The .L15 label could even be moved to a cold section.
>From gcc-bugs-return-626018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 17:25:16 2018
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From: "jg at jguk dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88512] New: Too much STL in error output
Date: Sat, 15 Dec 2018 17:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88512
Bug ID: 88512
Summary: Too much STL in error output
Product: gcc
Version: 8.2.0
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Hello
Could the STL template output be reduced? It currently is roughly double that
of CLANG. Although I think can reasonably get down to 3 lines. Output included
below, and an example of something more brief.
// g++ -Wall -o stl_string stl_string.cpp
#include <string>
int main()
{
std::string str("hello ");
std::size_t s = str.find(" ");
str.erase(s, str.end());
}
Expected output something similar to the following expected
stl_string.cpp: In function ‘int main()’:
stl_string.cpp:10:15: error: invalid conversion from ‘std::size_t’
’const_iterator’ std::string erase()
Actual output:
$ g++ -Wall -o stl_string stl_string.cpp
stl_string.cpp: In function ‘int main()’:
stl_string.cpp:7:27: error: no matching function for call to
‘std::__cxx11::basic_string<char>::erase(std::size_t&,
std::__cxx11::basic_string<char>::iterator)’
str.erase(s, str.end());
^
In file included from /usr/include/c++/7/string:52:0,
from stl_string.cpp:2:
/usr/include/c++/7/bits/basic_string.h:1779:7: note: candidate:
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&
std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::erase(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type,
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT =
char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned
int]
erase(size_type __pos = 0, size_type __n = npos)
^~~~~
/usr/include/c++/7/bits/basic_string.h:1779:7: note: no known conversion for
argument 2 from ‘std::__cxx11::basic_string<char>::iterator {aka
__gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string<char> >}’ to
‘std::__cxx11::basic_string<char>::size_type {aka long unsigned int}’
/usr/include/c++/7/bits/basic_string.h:1798:7: note: candidate:
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::iterator
std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::erase(std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::__const_iterator) [with _CharT = char; _Traits =
std::char_traits<char>; _Alloc = std::allocator<char>;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::iterator =
__gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string<char> >;
typename __gnu_cxx::__alloc_traits<typename
__gnu_cxx::__alloc_traits<_Alloc>::rebind<_CharT>::other>::pointer = char*;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::__const_iterator =
__gnu_cxx::__normal_iterator<const char*, std::__cxx11::basic_string<char> >;
typename __gnu_cxx::__alloc_traits<typename
__gnu_cxx::__alloc_traits<_Alloc>::rebind<_CharT>::other>::const_pointer =
const char*]
erase(__const_iterator __position)
^~~~~
/usr/include/c++/7/bits/basic_string.h:1798:7: note: candidate expects 1
argument, 2 provided
/usr/include/c++/7/bits/basic_string.h:1817:7: note: candidate:
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::iterator
std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::erase(std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::__const_iterator, std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::__const_iterator) [with _CharT = char; _Traits =
std::char_traits<char>; _Alloc = std::allocator<char>;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::iterator =
__gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string<char> >;
typename __gnu_cxx::__alloc_traits<typename
__gnu_cxx::__alloc_traits<_Alloc>::rebind<_CharT>::other>::pointer = char*;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::__const_iterator =
__gnu_cxx::__normal_iterator<const char*, std::__cxx11::basic_string<char> >;
typename __gnu_cxx::__alloc_traits<typename
__gnu_cxx::__alloc_traits<_Alloc>::rebind<_CharT>::other>::const_pointer =
const char*]
erase(__const_iterator __first, __const_iterator __last)
^~~~~
/usr/include/c++/7/bits/basic_string.h:1817:7: note: no known conversion for
argument 1 from ‘std::size_t {aka long unsigned int}’ to
‘std::__cxx11::basic_string<char>::__const_iterator {aka
__gnu_cxx::__normal_iterator<const char*, std::__cxx11::basic_string<char> >}’
CLANG:
$ clang -Wall -o stl_string stl_string.cpp
stl_string.cpp:7:9: error: no matching member function for call to 'erase'
str.erase(s, str.end());
~~~~^~~~~
/usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/basic_string.h:1789:7:
note: candidate
function not viable: no known conversion from
'std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >::iterator' (aka '__normal_iterator<char *,
std::__cxx11::basic_string<char> >') to
'std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >::size_type'
(aka 'unsigned long') for 2nd argument
erase(size_type __pos = 0, size_type __n = npos)
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/basic_string.h:1827:7:
note: candidate
function not viable: no known conversion from 'std::size_t' (aka
'unsigned long') to
'std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >::__const_iterator' (aka
'__normal_iterator<const char *, std::__cxx11::basic_string<char> >') for
1st argument
erase(__const_iterator __first, __const_iterator __last)
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/basic_string.h:1808:7:
note: candidate
function not viable: requires single argument '__position', but 2
arguments were provided
erase(__const_iterator __position)
^
1 error generated.
>From gcc-bugs-return-626019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 17:27:44 2018
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From: "jg at jguk dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88512] Too much STL in error output
Date: Sat, 15 Dec 2018 17:27:00 -0000
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--- Comment #1 from Jonny Grant <jg at jguk dot org> ---
MSVC 19 isn't much better
<source>(7): error C2664:
'std::_String_iterator<std::_String_val<std::_Simple_types<_Ty>>>
std::basic_string<char,std::char_traits<char>,std::allocator<_Ty>>::erase(const
std::_String_const_iterator<std::_String_val<std::_Simple_types<_Ty>>>,const
std::_String_const_iterator<std::_String_val<std::_Simple_types<_Ty>>>)':
cannot convert argument 2 from
'std::_String_iterator<std::_String_val<std::_Simple_types<_Ty>>>' to 'unsigned
__int64'
with
[
_Ty=char
]
<source>(7): note: No user-defined-conversion operator available that can
perform this conversion, or the operator cannot be called
Compiler returned: 2
>From gcc-bugs-return-626020-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 17:41:46 2018
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Subject: [Bug target/88513] New: [9 Regression] FAIL: gcc.target/i386/pr59591-1.c
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Bug ID: 88513
Summary: [9 Regression] FAIL: gcc.target/i386/pr59591-1.c
Product: gcc
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On x86-64 with -march=skylake-avx512, r267170 gave
FAIL: gcc.dg/vect/pr59591-1.c -flto -ffat-lto-objects (internal compiler error)
FAIL: gcc.dg/vect/pr59591-1.c -flto -ffat-lto-objects (test for excess errors)
FAIL: gcc.dg/vect/pr59591-1.c (internal compiler error)
FAIL: gcc.dg/vect/pr59591-1.c (test for excess errors)
FAIL: gcc.target/i386/pr59591-1.c (internal compiler error)
FAIL: gcc.target/i386/pr59591-1.c (test for excess errors)
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88514] New: [9 Regression] FAIL: gcc.target/i386/avx512vl-pr79299-1.c (internal compiler error)
Date: Sat, 15 Dec 2018 17:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88514
Bug ID: 88514
Summary: [9 Regression] FAIL:
gcc.target/i386/avx512vl-pr79299-1.c (internal
compiler error)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
Target: i386, x86-64
On x86-64 with -march=skylake-avx512, r267170 gave
FAIL: gcc.target/i386/avx512vl-pr79299-1.c (internal compiler error)
>From gcc-bugs-return-626022-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 19:02:21 2018
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Subject: [Bug target/88513] [9 Regression] FAIL: gcc.target/i386/pr59591-1.c
Date: Sat, 15 Dec 2018 19:02:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-15
CC| |jakub at redhat dot com
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
This is caused by r267097.
>From gcc-bugs-return-626023-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 19:36:08 2018
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From: "Casey at Carter dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88515] New: [concepts] id-expression that names non-static data member rejected in requires-expression
Date: Sat, 15 Dec 2018 19:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88515
Bug ID: 88515
Summary: [concepts] id-expression that names non-static data
member rejected in requires-expression
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: Casey at Carter dot net
Target Milestone: ---
Compiling this TU:
template<class T> concept bool C =
requires { T::value; };
struct S { int value; };
static_assert(C<S>);
with "g++ -std=c++2a -fconcepts -c" produces:
/home/casey/casey/Desktop/repro2.cpp:5:15: error: invalid use of non-static
data member ‘S::value’
5 | static_assert(C<S>);
| ^~~~
/home/casey/casey/Desktop/repro2.cpp:4:16: note: declared here
4 | struct S { int value; };
| ^~~~~
/home/casey/casey/Desktop/repro2.cpp:5:15: error: static assertion failed
5 | static_assert(C<S>);
|
when it should compile successfully since an id-expression that denotes a
non-static data member can appear in an unevaluated operand
([expr.prim.id]/2.3) and expressions appearing within a requirement-body are
unevaluated operands ([expr.prim.req]/2).
>From gcc-bugs-return-626024-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 19:46:09 2018
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Subject: [Bug target/88514] [9 Regression] FAIL: gcc.target/i386/avx512vl-pr79299-1.c (internal compiler error)
Date: Sat, 15 Dec 2018 19:46:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-15
CC| |jakub at redhat dot com
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
This is caused by r267097.
>From gcc-bugs-return-626025-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 20:01:12 2018
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88512] Too much STL in error output
Date: Sat, 15 Dec 2018 20:01:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
As someone who regularly has to debug complicated template code, I think all
the information printed by g++ here is useful. There may be more compact ways
of giving the same information (use a shorthand for
"std::__cxx11::basic_string<_CharT, _Traits, _Alloc>"?), but I do want all the
information.
We could special case standard library code to print less details because
supposedly the library is perfect, we are debugging user code and not the
library, so some of the information is unnecessary, but I am not convinced this
is doable.
>From gcc-bugs-return-626026-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 22:54:05 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88138] ICE in gfc_arith_concat, at fortran/arith.c:1007
Date: Sat, 15 Dec 2018 22:54:00 -0000
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--- Comment #2 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Dec 15 22:53:26 2018
New Revision: 267177
URL: https://gcc.gnu.org/viewcvs?rev=267177&root=gcc&view=rev
Log:
2019-12-15 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88138
* decl.c (variable_decl): Check that a derived isn't being assigned
an incompatible entity in an initialization.
2019-12-15 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88138
* gfortran.dg/pr88138.f90: new test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr88138.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-626027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 23:28:10 2018
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From: "jg at jguk dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88512] Too much STL in error output
Date: Sat, 15 Dec 2018 23:28:00 -0000
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--- Comment #3 from Jonny Grant <jg at jguk dot org> ---
Hi Marc
I agree to useful to have the option to keep on for regular code.
Perhaps a way just to turn off all expansive output for STL's std namespace?
The easiest would be to remove cxx11 namespace from the messages
"std::__cxx11::basic_string" etc, so at least that doesn't shwo.
Updated output I had executed from STL with clear candidate suggestions:
$ g++ -Wall -o stl_string stl_string.cpp
stl_string.cpp: In function ‘int main()’:
stl_string.cpp:7:27: error: no matching function for call to
‘std::string::erase(std::size_t&, std::string::iterator)’
str.erase(s, str.end());
^
candidates are:
std::string& std::string::erase(size_type index = 0, size_type count =
npos)
std::string::iterator std::string::erase(const_iterator first,
const_iterator last)
std::string::iterator std::string::erase(const_iterator position)
>From gcc-bugs-return-626028-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 23:31:50 2018
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Subject: [Bug fortran/88138] ICE in gfc_arith_concat, at fortran/arith.c:1007
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--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Dec 15 23:30:50 2018
New Revision: 267178
URL: https://gcc.gnu.org/viewcvs?rev=267178&root=gcc&view=rev
Log:
2018-12-15 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88138
* decl.c (variable_decl): Check that a derived isn't being assigned
an incompatible entity in an initialization.
2018-12-15 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88138
* gfortran.dg/pr88138.f90: new test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88138.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/decl.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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From: "krzysio.kurek at wp dot pl" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/88516] New: Internal LTO error when linking against static libSFML
Date: Sat, 15 Dec 2018 23:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88516
Bug ID: 88516
Summary: Internal LTO error when linking against static libSFML
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: krzysio.kurek at wp dot pl
CC: marxin at gcc dot gnu.org
Target Milestone: ---
sysinfo:
gcc (SUSE Linux) 8.2.1 20181108 [gcc-8-branch revision 265914]
OpenSUSE Tumbleweed 20181213
GCC configuration:
../configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man
--libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++,objc,fortran,obj-c++,ada,go
--enable-offload-targets=hsa,nvptx-none=/usr/nvptx-none, --without-cuda-driver
--enable-checking=release --disable-werror
--with-gxx-include-dir=/usr/include/c++/8 --enable-ssp --disable-libssp
--disable-libvtv --disable-cet --disable-libcc1 --enable-plugin
--with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux'
--with-slibdir=/lib64 --with-system-zlib --enable-libstdcxx-allocator=new
--disable-libstdcxx-pch --enable-version-specific-runtime-libs
--with-gcc-major-version-only --enable-linker-build-id --enable-linux-futex
--enable-gnu-indirect-function --program-suffix=-8 --without-system-libunwind
--enable-multilib --with-arch-32=x86-64 --with-tune=generic
--build=x86_64-suse-linux --host=x86_64-suse-linux
exact commandline:
g++ main.cpp /usr/local/lib/libsfml-graphics-s.a
/usr/local/lib/libsfml-window-s.a /usr/local/lib/libsfml-system-s.a -lpthread
-lrt /usr/lib64/libudev.so /usr/lib64/libOpenGL.so /usr/lib64/libX11.so
/usr/lib64/libXrandr.so /usr/lib64/libfreetype.so
error message:
lto1: internal compiler error: in add_symbol_to_partition_1, at
lto/lto-partition.c:155
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugs.opensuse.org/> for instructions.
lto-wrapper: fatal error: g++ returned 1 exit status
compilation terminated.
/usr/lib64/gcc/x86_64-suse-linux/8/../../../../x86_64-suse-linux/bin/ld: error:
lto-wrapper failed
collect2: error: ld returned 1 exit status
Happens with a locally compiled SFML, commit
b9fdaf487f878fac17c3d4c1182acd8c4182eecc, with LTO enabled and compiled to
static libraries.
>From gcc-bugs-return-626030-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 23:42:10 2018
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Subject: [Bug target/88514] [9 Regression] FAIL: gcc.target/i386/avx512vl-pr79299-1.c (internal compiler error)
Date: Sat, 15 Dec 2018 23:42:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think the ICE is for the same reason as why we don't vectorize:
int a[1024];
short int b[1024];
long long c[1024];
void
baz (void)
{
for (int i = 0; i < 1024; i++)
if (a[i] > 10)
c[i] = 5;
}
with -O3 -mavx512{bw,vl,dq} -mprefer-vector-width=256 (or 128).
Unlike the code I've added which uses VEC_{LO,HI}_UNPACK_EXPR on the boolean
vectors directly, vectorizable_conversion checks supportable_widening_operation
and fails because for the vectype_in vector(8) bool and vectype_out vector(4)
bool it can't find an optab. We have vec_unpacks_{lo,hi}_{hi,si,di} optabs
that cover vector(64) bool -> vector(32) bool, vector(32) bool -> vector(16)
bool and vector(16) bool -> vector(8) bool operations. If we added
vec_unpacks_{lo,hi}_qi, it would be ambiguous, whether it is vector(8) bool ->
vector(4) bool or vector(4) bool -> vector(2) bool, so wonder whether we need a
new optab or pass some extra argument to the optab which would tell it the
nunits. The operations we are looking for is really a nop for
vec_unpacks_lo_qi
(so actually don't care about the nunits), the 8 or 4 bit bool vector (mask)
has the right bits in the bottom bits, but we need to use a different shift for
vec_unpacks_hi_qi (either kshiftr{w,b} $4, %kN, %kM or kshiftr{w,b} $2, %kN,
%kM).
>From gcc-bugs-return-626031-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Dec 15 23:44:50 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/88516] Internal LTO error when linking against static libSFML
Date: Sat, 15 Dec 2018 23:44:00 -0000
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--- Comment #1 from krzysio.kurek at wp dot pl ---
I'm afraid this is as minimal as it gets. Should I set up a git repo with all
sources needed to reproduce the error?
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Subject: [Bug c++/88482] ICE when wrongly declaring __cxa_allocate_exception
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 15 23:51:31 2018
New Revision: 267179
URL: https://gcc.gnu.org/viewcvs?rev=267179&root=gcc&view=rev
Log:
PR c++/88482
* except.c (verify_library_fn): New function.
(declare_library_fn): Use it. Initialize TM even if the non-TM
library function has been user declared.
(do_end_catch): Don't set TREE_NOTHROW on error_mark_node.
(expand_start_catch_block): Don't call initialize_handler_parm
for error_mark_node.
(build_throw): Use verify_library_fn. Initialize TM even if the
non-TM library function has been user declared. Don't crash if
any library fn is error_mark_node.
* g++.dg/eh/builtin5.C: New test.
* g++.dg/eh/builtin6.C: New test.
* g++.dg/eh/builtin7.C: New test.
* g++.dg/eh/builtin8.C: New test.
* g++.dg/eh/builtin9.C: New test.
* g++.dg/eh/builtin10.C: New test.
* g++.dg/eh/builtin11.C: New test.
* g++.dg/parse/crash55.C: Adjust expected diagnostics.
* eh_cpp.cc (__cxa_throw): Change DEST argument type from
void * to void (*) (void *).
(_ITM_cxa_throw): Likewise.
* libitm.h (_ITM_cxa_throw): Likewise.
* libitm.texi (_ITM_cxa_throw): Likewise.
Added:
trunk/gcc/testsuite/g++.dg/eh/builtin10.C
trunk/gcc/testsuite/g++.dg/eh/builtin11.C
trunk/gcc/testsuite/g++.dg/eh/builtin5.C
trunk/gcc/testsuite/g++.dg/eh/builtin6.C
trunk/gcc/testsuite/g++.dg/eh/builtin7.C
trunk/gcc/testsuite/g++.dg/eh/builtin8.C
trunk/gcc/testsuite/g++.dg/eh/builtin9.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/except.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/parse/crash55.C
trunk/libitm/ChangeLog
trunk/libitm/eh_cpp.cc
trunk/libitm/libitm.h
trunk/libitm/libitm.texi
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Subject: [Bug lto/88516] Internal LTO error when linking against static libSFML
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--- Comment #2 from krzysio.kurek at wp dot pl ---
Created attachment 45243
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45243&action=edit
preprocessed file
Oh I just noticed that the preprocessed file didn't get attached.
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Subject: [Bug fortran/88138] ICE in gfc_arith_concat, at fortran/arith.c:1007
Date: Sat, 15 Dec 2018 23:57:00 -0000
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--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat Dec 15 23:57:03 2018
New Revision: 267180
URL: https://gcc.gnu.org/viewcvs?rev=267180&root=gcc&view=rev
Log:
2018-12-15 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88138
* decl.c (variable_decl): Check that a derived isn't being assigned
an incompatible entity in an initialization.
2018-12-15 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88138
* gfortran.dg/pr88138.f90: new test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr88138.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/decl.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88138] ICE in gfc_arith_concat, at fortran/arith.c:1007
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |kargl at gcc dot gnu.org
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Target Milestone|--- |7.5
--- Comment #5 from kargl at gcc dot gnu.org ---
Fixed on trunk, branch-8, and branch-7. Closing.
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Subject: [Bug c++/88517] New: Virtual-base class class constructor with for-loop with initializer list referencing local variable not executed
Date: Sun, 16 Dec 2018 02:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88517
Bug ID: 88517
Summary: Virtual-base class class constructor with for-loop
with initializer list referencing local variable not
executed
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jengelh at inai dot de
Target Milestone: ---
== Testcase
#include <iostream>
#include <initializer_list>
struct B {};
struct D : public virtual B { D(); };
D::D()
{
int z = 42;
for (auto i : {z})
std::cout << i << std::endl;
}
int main() { D o; }
== Observed behavior ==
$ g++-7 x.cpp -Wall && ./a.out
$ g++-8 x.cpp -Wall && ./a.out
$ g++-9 x.cpp -Wall && ./a.out
== Expected behavior
./a.out
42
== Additional info
Using built-in specs.
COLLECT_GCC=g++-7
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/7/lto-wrapper
OFFLOAD_TARGET_NAMES=hsa:nvptx-none
Target: x86_64-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++,objc,fortran,obj-c++,ada,go
--enable-offload-targets=hsa,nvptx-none=/usr/nvptx-none, --without-cuda-driver
--enable-checking=release --disable-werror
--with-gxx-include-dir=/usr/include/c++/7 --enable-ssp --disable-libssp
--disable-libvtv --disable-libcc1 --enable-plugin
--with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux'
--with-slibdir=/lib64 --with-system-zlib --enable-libstdcxx-allocator=new
--disable-libstdcxx-pch --enable-version-specific-runtime-libs
--with-gcc-major-version-only --enable-linker-build-id --enable-linux-futex
--enable-gnu-indirect-function --program-suffix=-7 --without-system-libunwind
--enable-multilib --with-arch-32=x86-64 --with-tune=generic
--build=x86_64-suse-linux --host=x86_64-suse-linux
Thread model: posix
gcc version 7.4.0 (SUSE Linux)
Using built-in specs.
Reading specs from /usr/lib64/gcc/x86_64-suse-linux/8/defaults.spec
COLLECT_GCC=g++-8
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/8/lto-wrapper
OFFLOAD_TARGET_NAMES=hsa:nvptx-none
Target: x86_64-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++,objc,fortran,obj-c++,ada,go
--enable-offload-targets=hsa,nvptx-none=/usr/nvptx-none, --without-cuda-driver
--enable-checking=release --disable-werror
--with-gxx-include-dir=/usr/include/c++/8 --enable-ssp --disable-libssp
--disable-libvtv --disable-cet --disable-libcc1 --enable-plugin
--with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux'
--with-slibdir=/lib64 --with-system-zlib --enable-libstdcxx-allocator=new
--disable-libstdcxx-pch --enable-version-specific-runtime-libs
--with-gcc-major-version-only --enable-linker-build-id --enable-linux-futex
--enable-gnu-indirect-function --program-suffix=-8 --without-system-libunwind
--enable-multilib --with-arch-32=x86-64 --with-tune=generic
--build=x86_64-suse-linux --host=x86_64-suse-linux
Thread model: posix
gcc version 8.2.1 20181108 [gcc-8-branch revision 265914] (SUSE Linux)
Using built-in specs.
COLLECT_GCC=g++-9
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/9/lto-wrapper
OFFLOAD_TARGET_NAMES=hsa:nvptx-none
Target: x86_64-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++,objc,fortran,obj-c++,ada,go,d
--enable-offload-targets=hsa,nvptx-none=/usr/nvptx-none, --without-cuda-driver
--disable-werror --with-gxx-include-dir=/usr/include/c++/9 --enable-ssp
--disable-libssp --disable-libvtv --disable-cet --disable-libcc1
--enable-plugin --with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE
Linux' --with-slibdir=/lib64 --with-system-zlib
--enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-libphobos
--enable-version-specific-runtime-libs --with-gcc-major-version-only
--enable-linker-build-id --enable-linux-futex --enable-gnu-indirect-function
--program-suffix=-9 --without-system-libunwind --enable-multilib
--with-arch-32=x86-64 --with-tune=generic --build=x86_64-suse-linux
--host=x86_64-suse-linux
Thread model: posix
gcc version 9.0.0 20181204 (experimental) [trunk revision 266778] (SUSE Linux)
>From gcc-bugs-return-626037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 02:11:26 2018
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From: "jengelh at inai dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88517] Virtual-base class class constructor with for-loop with initializer list referencing local variable not executed
Date: Sun, 16 Dec 2018 02:11:00 -0000
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--- Comment #1 from Jan Engelhardt <jengelh at inai dot de> ---
> clang++ x.cpp -Wall && ./a.out
42
> clang++ -v
clang version 6.0.1 (tags/RELEASE_601/final 335528)
Target: x86_64-unknown-linux-gnu
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Subject: [Bug c/87944] Wrong code with LRA pushing stack local variable
Date: Sun, 16 Dec 2018 03:33:00 -0000
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--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 16 03:33:05 2018
New Revision: 267184
URL: https://gcc.gnu.org/viewcvs?rev=267184&root=gcc&view=rev
Log:
2018-12-15 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/87944
* decl.c (match_data_constant): Allow inquiry parameter as data
constant in data statement.
2018-12-15 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/87944
* gfortran.dg/pr87994_1.f90: New test.
* gfortran.dg/pr87994_2.f90: Ditto.
* gfortran.dg/pr87994_3.f90: Ditto.
Added:
trunk/gcc/testsuite/gfortran.dg/pr87994_1.f90
trunk/gcc/testsuite/gfortran.dg/pr87994_2.f90
trunk/gcc/testsuite/gfortran.dg/pr87994_3.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87994] ICE in match_data_constant, at fortran/decl.c:399
Date: Sun, 16 Dec 2018 03:37:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Target Milestone|--- |9.0
--- Comment #9 from kargl at gcc dot gnu.org ---
Fixed on trunk.
>From gcc-bugs-return-626040-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 04:21:36 2018
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Subject: [Bug middle-end/88518] New: Function call defeats -Wuninitialized
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88518
Bug ID: 88518
Summary: Function call defeats -Wuninitialized
Product: gcc
Version: unknown
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void g(unsigned long *);
void h(void);
void f(void)
{
unsigned long i;
h();
i++;
g(&i);
}
$ gcc -Wall -O2 -c test5.c -o /dev/null
reports no warning. If the order of 'i++' and 'h()' are reversed, GCC emits a
warning as expected.
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-9'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Debian 8.2.0-9)
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/88518] Function call defeats -Wuninitialized
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think there is a dup of this bug already and one which descibes what need to
be done. Basically escape analysis is not flow sensative. That means GCC is
currently assuming that i escapes at the very first function call, h, rather
later on when g is called.
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Subject: [Bug c++/88512] Too much STL in error output
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Jonny Grant from comment #3)
> Updated output I had executed from STL with clear candidate suggestions:
>
> $ g++ -Wall -o stl_string stl_string.cpp
> stl_string.cpp: In function ‘int main()’:
> stl_string.cpp:7:27: error: no matching function for call to
> ‘std::string::erase(std::size_t&, std::string::iterator)’
> str.erase(s, str.end());
> ^
> candidates are:
> std::string& std::string::erase(size_type index = 0, size_type count =
> npos)
> std::string::iterator std::string::erase(const_iterator first,
> const_iterator last)
> std::string::iterator std::string::erase(const_iterator position)
Maybe for the standard library... For user code I would still want a reminder
somewhere of what size_type, iterator, const_iterator and string are aliases
for. Besides, gcc currently tells you why the candidate was not picked, which
is also useful.
What I expect would work is to have the message as a tree that originally only
shows the error message, but where you can click to show the candidates, click
a candidate to show why it fails, click a type to see what it aliases, etc. But
that's only doable through an IDE.
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Subject: [Bug other/87695] Arduino: ICE with avr and LTO
Date: Sun, 16 Dec 2018 07:54:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jm.feuggelen at orange dot fr
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 88468 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/88468] Arduino: 1.8.8 (Windows 10) internal compiler error , segmentation fault
Date: Sun, 16 Dec 2018 07:54:00 -0000
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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 87695.
*** This bug has been marked as a duplicate of bug 87695 ***
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From: "harald at gigawatt dot nl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/26732] different argument type not rejected for K&R style function definitions
Date: Sun, 16 Dec 2018 10:31:00 -0000
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Harald van Dijk <harald at gigawatt dot nl> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Harald van Dijk <harald at gigawatt dot nl> ---
(In reply to Eric Gallager from comment #7)
> (In reply to Andrew Pinski from comment #6)
> > Now we don't even error out at -O3.
>
> Why would the -O3 matter?
-O3 enables inlining, which up until GCC 4.2 triggered an error on the
parameter/argument type mismatch.
But GCC is correct to not report an error for that. This is only undefined at
runtime, so the compiler is required to allow this unless it can prove the
execution will reach that point of the code.
What's missing as of GCC 4.0 is GCC 3.4's default-enabled warning "warning:
structure defined inside parms".
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/88422] collect2.exe: fatal error: lto-wrapper returned 1 exit status: file not recognized: file truncated
Date: Sun, 16 Dec 2018 10:31:00 -0000
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--- Comment #5 from Nidal Faour <nidal.faour at wdc dot com> ---
i've used the RV gcc official toolchain and reverted the patch as Jim did.
and it passed in the test case, but when i moved to a bigger code, i failed
again to build. and it turned out that it passed only if i drop the -g option
from the compiling command.
when using the -g option it will get the "file not recognized: file format not
recognized" again.
i've downloaded the RV toolchain from:
https://github.com/riscv/riscv-gnu-toolchain
configuration for linux building:
./configure --with-arch=rv64imafdc --with-abi=lp64d --enable-multilib
--prefix=<Path-to-build-output>
configuration for windows building:
./configure --with-arch=rv64imafdc --with-abi=lp64d --enable-multilib
--without-system-zlib --with-cmodel=medany --with-host=x86_64-w64-mingw32
--prefix=<Path-to-win-build>
test case can be found at:
https://github.com/westerndigitalcorporation/riscv32-Code-density-test-bench/tree/master/lto_test_case
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Subject: [Bug target/88483] Unnecessary stack alignment
Date: Sun, 16 Dec 2018 13:55:00 -0000
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--- Comment #3 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Sun Dec 16 13:55:18 2018
New Revision: 267186
URL: https://gcc.gnu.org/viewcvs?rev=267186&root=gcc&view=rev
Log:
x86: Revert reversion 267133
Revert commit:
commit 76c21b271247ccbd681bdb4530426d2fe35dbfa5
Author: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri Dec 14 12:38:04 2018 +0000
x86: Don't use get_frame_size when finalizing stack frame
gcc/
PR target/88483
* config/i386/i386.c (ix86_finalize_stack_frame_flags): Revert
reversion 267133.
gcc/testsuite/
PR target/88483
* gcc.target/i386/stackalign/pr88483.c: Removed. Revert
reversion 267133.
Removed:
trunk/gcc/testsuite/gcc.target/i386/stackalign/pr88483.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/88483] Unnecessary stack alignment
Date: Sun, 16 Dec 2018 14:07:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2018-12-16
Resolution|FIXED |---
Target Milestone|9.0 |10.0
Ever confirmed|0 |1
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
Revisit it in GCC 10.
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Subject: [Bug c++/88512] Too much STL in error output
Date: Sun, 16 Dec 2018 14:21:00 -0000
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--- Comment #5 from Jonny Grant <jg at jguk dot org> ---
ICC 19.0.1 output
<source>(7): error: no instance of overloaded function
"std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::erase [with _CharT=char,
_Traits=std::char_traits<char>, _Alloc=std::allocator<char>]" matches the
argument list
argument types are: (std::size_t, __gnu_cxx::__normal_iterator<char
*, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char>>>)
object type is: std::__cxx11::string
str.erase(s, str.end());
^
/opt/compiler-explorer/gcc-8.2.0/bin/../include/c++/8.2.0/bits/basic_string.h(1827):
note: this candidate was rejected because arguments do not match
erase(__const_iterator __first, __const_iterator __last)
^
/opt/compiler-explorer/gcc-8.2.0/bin/../include/c++/8.2.0/bits/basic_string.h(1808):
note: this candidate was rejected because mismatch in count of arguments
erase(__const_iterator __position)
^
/opt/compiler-explorer/gcc-8.2.0/bin/../include/c++/8.2.0/bits/basic_string.h(1789):
note: this candidate was rejected because arguments do not match
erase(size_type __pos = 0, size_type __n = npos)
^
compilation aborted for <source> (code 2)
Compiler returned: 2
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Subject: [Bug c/88363] [9 Regression] alloc_align attribute doesn't accept enumerated arguments
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--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sun Dec 16 14:32:46 2018
New Revision: 267187
URL: https://gcc.gnu.org/viewcvs?rev=267187&root=gcc&view=rev
Log:
2018-12-16 Thomas Koenig <tkoenig@gcc.gnu.org>
PF fortran/88364
* trans-expr.c (gfc_conv_expr_reference): Do not add clobber if
the expression contains a reference.
2018-12-16 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/88363
* intent_out_13.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/intent_out_13.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/88364] [9 Regression] Wrong-code due to CLOBBER
Date: Sun, 16 Dec 2018 14:39:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed by rr267187.
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Subject: [Bug middle-end/41453] use INTENT(out) for optimization
Date: Sun, 16 Dec 2018 14:40:00 -0000
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--- Comment #7 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Also still to do: Do some more precise clobbering for
the case of PR88364, i.e. for
call foo(a&x)
clobber a%x, which is currently not done.
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From: "matthew at wil dot cx" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/88518] Function call defeats -Wuninitialized
Date: Sun, 16 Dec 2018 14:49:00 -0000
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--- Comment #2 from Matthew Wilcox <matthew at wil dot cx> ---
Thanks! What I actually want to do is annotate g() to the effect that it reads
the pointed-to variable before it writes it. IOW, I want to write something
like:
void g(unsigned long __attribute__((read_before_write)) *p);
void h(void);
void f(void)
{
unsigned long i;
h();
g(&i);
}
and have gcc emit a warning that i is used uninitialised. I tried adding i = i
prior to the call of g() through macro trickery, but was surprised that it
didn't trigger, and simplified down to this test-case.
Any chance I could get that attribute or something like it?
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Subject: [Bug debug/79342] [6 Regression] ICE in output_index_string, at dwarf2out.c:25635 with -gsplit-dwarf
Date: Sun, 16 Dec 2018 15:10:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> ---
On x86, r267186 fails:
[hjl@gnu-cfl-2 gcc]$ ./xgcc -B./ -march=skylake -mrtm -mabm -m32 -gsplit-dwarf
-g3 -O2 -S /export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/pr79342.c
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.dg/pr79342.c:18:1:
internal compiler error: in output_index_string, at dwarf2out.c:28777
18 | }
| ^
0xb751c7 output_index_string(indirect_string_node**, unsigned int*)
/export/gnu/import/git/sources/gcc/gcc/dwarf2out.c:28777
0xb75450 output_indirect_strings
/export/gnu/import/git/sources/gcc/gcc/dwarf2out.c:28865
0xb7aeac dwarf2out_finish
/export/gnu/import/git/sources/gcc/gcc/dwarf2out.c:31563
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.
[hjl@gnu-cfl-2 gcc]$
The problem is
Breakpoint 10, index_string (h=0x7fffea9910b0, index=0x7fffffffd6d4)
at /export/gnu/import/git/sources/gcc/gcc/dwarf2out.c:28734
28734 find_string_form (node);
Missing separate debuginfos, use: dnf debuginfo-install
gmp-6.1.2-8.0.fc29.x86_64 isl-0.16.1-7.0.fc29.x86_64
libmpc-1.1.0-2.0.fc29.x86_64 mpfr-3.1.6-2.fc29.x86_64
(gdb) p *node
$26 = {
str = 0x7fffea9554e0 "GNU C17 9.0.0 20181216 (experimental) -march=skylake
-mrtm -mabm -m32 -gsplit-dwarf -g3 -O2", refcount = 2, form = 0, label = 0x0,
index = 0}
(gdb)
Its form isn't DW_FORM_GNU_str_index.
(gdb) p *node
$27 = {
str = 0x7fffea9554e0 "GNU C17 9.0.0 20181216 (experimental) -march=skylake
-mrtm -mabm -m32 -gsplit-dwarf -g3 -O2", refcount = 2,
form = DW_FORM_GNU_str_index, label = 0x30adc00 "*.LASF375",
index = 4294967294}
(gdb)
Now it is.
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Subject: [Bug debug/79342] [6 Regression] ICE in output_index_string, at dwarf2out.c:25635 with -gsplit-dwarf
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
Status|REOPENED |NEW
--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> ---
index_string -> find_string_form -> set_indirect_string makes string
indexes out of order.
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From: "toon at moene dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88519] New: internal compiler error: in expand_widen_pattern_expr, at optabs.c:278
Date: Sun, 16 Dec 2018 15:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88519
Bug ID: 88519
Summary: internal compiler error: in expand_widen_pattern_expr,
at optabs.c:278
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: toon at moene dot org
Target Milestone: ---
Created attachment 45244
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45244&action=edit
Source code that provokes the ICE.
The attached source provokes the following ICE:
during RTL pass: expand
hlcfint2.f90:159:0:
159 | zpsi2 = ppsi(i,k) +
(ppsi(i,k)-ppsi(i,k-1))*zxx/(pph(i,k)-pph(i,k-1))
|
internal compiler error: in expand_widen_pattern_expr, at optabs.c:278
0x6bcac1 expand_widen_pattern_expr(separate_ops*, rtx_def*, rtx_def*, rtx_def*,
rtx_def*, int)
/home/toon/compilers/trunk/gcc/optabs.c:278
0xabe134 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
/home/toon/compilers/trunk/gcc/expr.c:9465
0xaaeb2f expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/home/toon/compilers/trunk/gcc/expr.c:9882
0xaac1b5 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/home/toon/compilers/trunk/gcc/expr.c:11037
0xab8843 store_expr(tree_node*, rtx_def*, int, bool, bool)
/home/toon/compilers/trunk/gcc/expr.c:5633
0xab9f79 expand_assignment(tree_node*, tree_node*, bool)
/home/toon/compilers/trunk/gcc/expr.c:5416
0xab9f79 expand_assignment(tree_node*, tree_node*, bool)
/home/toon/compilers/trunk/gcc/expr.c:4977
0x9a064f expand_gimple_stmt_1
/home/toon/compilers/trunk/gcc/cfgexpand.c:3746
0x9a064f expand_gimple_stmt
/home/toon/compilers/trunk/gcc/cfgexpand.c:3844
0x9a2b01 expand_gimple_basic_block
/home/toon/compilers/trunk/gcc/cfgexpand.c:5880
0x9a7687 execute
/home/toon/compilers/trunk/gcc/cfgexpand.c:6502
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
when compiled in the following way:
~toon/compilers/install/bin/gfortran -Ofast -march=skylake-avx512 -c
hlcfint2.f90
Version of the compiler:
~toon/compilers/install/bin/gfortran -v
Using built-in specs.
COLLECT_GCC=/home/toon/compilers/install/bin/gfortran
COLLECT_LTO_WRAPPER=/home/toon/compilers/install/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /home/toon/compilers/trunk/configure
--prefix=/home/toon/compilers/install --with-gnu-as --with-gnu-ld
--enable-languages=all,go,ada --disable-multilib --disable-nls
Thread model: posix
gcc version 9.0.0 20181216 (experimental) (GCC)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84863
--- Comment #3 from Arnd Bergmann <arnd at linaro dot org> ---
The problem in the kernel then is that we then have to turn off the sanitizers
for the 'allmodconfig' build, since the recommended minimum regression testing
for kernel changes involves building a kernel with all options (including
UBSAN) enabled and checking that there are no compiler warnings.
This means we would fail to catch any build regressions in the kernel part of
UBSAN, as well as any legitimate warnings that are only seen when the
sanitizers are active.
>From gcc-bugs-return-626058-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 16:21:52 2018
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Subject: [Bug target/88514] [9 Regression] FAIL: gcc.target/i386/avx512vl-pr79299-1.c (internal compiler error)
Date: Sun, 16 Dec 2018 16:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88514
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45245
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45245&action=edit
gcc9-pr88514-wip.patch
Untested WIP patch. With this I can vectorize the above testcase fine, but the
testcase in #c0 still ICEs, just with a different ICE.
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Subject: [Bug target/88513] [9 Regression] FAIL: gcc.target/i386/pr59591-1.c
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Likely dup of PR88514.
>From gcc-bugs-return-626059-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 16:22:21 2018
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From: "tromey at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88520] New: improve warning when `struct` is required
Date: Sun, 16 Dec 2018 16:22:00 -0000
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Bug ID: 88520
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Consider this source:
int Foo;
struct Foo
{
int a;
};
extern int f(Foo x);
gcc (I'm using 8.2.1 from Fedora 28) says:
q.cc:8:14: warning: ‘f’ initialized and declared ‘extern’
extern int f(Foo x);
^~~
q.cc:8:17: error: expected ‘)’ before ‘x’
extern int f(Foo x);
~ ^~
)
clang is somewhat nicer here, showing where the definition appeared.
This is handy info for figuring out what went wrong:
q.cc:8:14: error: must use 'struct' tag to refer to type 'Foo' in this scope
extern int f(Foo x);
^
struct
q.cc:1:5: note: struct 'Foo' is hidden by a non-type declaration of 'Foo' here
int Foo;
^
This came up on the gdb list, where a user couldn't figure out why
gcc was erroring.
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Subject: [Bug rtl-optimization/88519] internal compiler error: in expand_widen_pattern_expr, at optabs.c:278
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Likely dup of PR88514.
>From gcc-bugs-return-626062-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 16:31:20 2018
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Subject: [Bug fortran/88467] Silently accepts wrong array constructor
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88467
--- Comment #6 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 16 16:29:43 2018
New Revision: 267189
URL: https://gcc.gnu.org/viewcvs?rev=267189&root=gcc&view=rev
Log:
2018-12-16 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88116
PR fortran/88467
* array.c (gfc_match_array_constructor): Check return value of
gfc_convert_type(). Skip constructor elements with BT_UNKNOWN,
which need to go through resolution.
* intrinsic.c (gfc_convert_type_warn): Return early if the types
martch (i.e., no conversion is required).
* simplify.c (gfc_convert_constant): Remove a gfc_internal_error,
and return gfc_bad_expr.
2018-12-16 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88116
* gfortran.dg/pr88116_1.f90: New test.
* gfortran.dg/pr88116_2.f90: Ditto.
PR fortran/88467
* gfortran.dg/pr88467.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr88116_1.f90
trunk/gcc/testsuite/gfortran.dg/pr88116_2.f90
trunk/gcc/testsuite/gfortran.dg/pr88467.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/array.c
trunk/gcc/fortran/intrinsic.c
trunk/gcc/fortran/simplify.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-626063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 16:31:21 2018
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88116] [8/9 Regression] ICE in gfc_convert_constant(): Unexpected type
Date: Sun, 16 Dec 2018 16:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88116
--- Comment #8 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 16 16:29:43 2018
New Revision: 267189
URL: https://gcc.gnu.org/viewcvs?rev=267189&root=gcc&view=rev
Log:
2018-12-16 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88116
PR fortran/88467
* array.c (gfc_match_array_constructor): Check return value of
gfc_convert_type(). Skip constructor elements with BT_UNKNOWN,
which need to go through resolution.
* intrinsic.c (gfc_convert_type_warn): Return early if the types
martch (i.e., no conversion is required).
* simplify.c (gfc_convert_constant): Remove a gfc_internal_error,
and return gfc_bad_expr.
2018-12-16 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88116
* gfortran.dg/pr88116_1.f90: New test.
* gfortran.dg/pr88116_2.f90: Ditto.
PR fortran/88467
* gfortran.dg/pr88467.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr88116_1.f90
trunk/gcc/testsuite/gfortran.dg/pr88116_2.f90
trunk/gcc/testsuite/gfortran.dg/pr88467.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/array.c
trunk/gcc/fortran/intrinsic.c
trunk/gcc/fortran/simplify.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-626065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 17:01:55 2018
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Subject: [Bug fortran/88467] Silently accepts wrong array constructor
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88467
--- Comment #7 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 16 17:00:33 2018
New Revision: 267190
URL: https://gcc.gnu.org/viewcvs?rev=267190&root=gcc&view=rev
Log:
2018-12-16 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88116
PR fortran/88467
* array.c (gfc_match_array_constructor): Check return value of
gfc_convert_type(). Skip constructor elements with BT_UNKNOWN,
which need to go through resolution.
* intrinsic.c (gfc_convert_type_warn): Return early if the types
martch (i.e., no conversion is required).
* simplify.c (gfc_convert_constant): Remove a gfc_internal_error,
and return gfc_bad_expr.
2018-12-16 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88116
* gfortran.dg/pr88116_1.f90: New test.
* gfortran.dg/pr88116_2.f90: Ditto.
PR fortran/88467
* gfortran.dg/pr88467.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88116_1.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88116_2.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88467.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/array.c
branches/gcc-8-branch/gcc/fortran/intrinsic.c
branches/gcc-8-branch/gcc/fortran/simplify.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/88116] [8/9 Regression] ICE in gfc_convert_constant(): Unexpected type
Date: Sun, 16 Dec 2018 17:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88116
--- Comment #9 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Dec 16 17:00:33 2018
New Revision: 267190
URL: https://gcc.gnu.org/viewcvs?rev=267190&root=gcc&view=rev
Log:
2018-12-16 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88116
PR fortran/88467
* array.c (gfc_match_array_constructor): Check return value of
gfc_convert_type(). Skip constructor elements with BT_UNKNOWN,
which need to go through resolution.
* intrinsic.c (gfc_convert_type_warn): Return early if the types
martch (i.e., no conversion is required).
* simplify.c (gfc_convert_constant): Remove a gfc_internal_error,
and return gfc_bad_expr.
2018-12-16 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/88116
* gfortran.dg/pr88116_1.f90: New test.
* gfortran.dg/pr88116_2.f90: Ditto.
PR fortran/88467
* gfortran.dg/pr88467.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88116_1.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88116_2.f90
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr88467.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/array.c
branches/gcc-8-branch/gcc/fortran/intrinsic.c
branches/gcc-8-branch/gcc/fortran/simplify.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88521] New: gcc 9.0 from r266355 miscompile x265 for mingw-w64 target
Date: Sun, 16 Dec 2018 17:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88521
Bug ID: 88521
Summary: gcc 9.0 from r266355 miscompile x265 for mingw-w64
target
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mateuszb at poczta dot onet.pl
Target Milestone: ---
Target: mingw-w64
x265 compiled by gcc 9.0 r266355 (or newer) for mingw-w64 makes wrong encoding
(awful quality).
Comparison of encoding by x265 compiled by gcc 9.0 r266354 vs. r266355 (see
bitrate and Avg QP):
f:\speed\2.9+15>x265r354 --crf 20 --no-asm
../Bosphorus_1920x1080_120fps_420_8bit_YUV.y4m w1.hevc && x265r355 --crf 20
--no-asm ../Bosphorus_1920x1080_120fps_420_8bit_YUV.y4m w2.hevc
y4m [info]: 1920x1080 fps 30/1 i420p8 frames 0 - 599 of 600
raw [info]: output file: w1.hevc
x265 [info]: HEVC encoder version 2.9+16-c829b5b75a9f
x265 [info]: build info [Windows][GCC 9.0.0][64 bit] 10bit
x265 [info]: using cpu capabilities: none!
x265 [info]: Main 10 profile, Level-4 (Main tier)
x265 [info]: Thread pool created using 12 threads
x265 [info]: Slices : 1
x265 [info]: frame threads / pool features : 3 / wpp(17 rows)
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge : hex / 57 / 2 / 2
x265 [info]: Keyframe min / max / scenecut / bias: 25 / 250 / 40 / 5.00
x265 [info]: Lookahead / bframes / badapt : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb : 1 / 1 / 0
x265 [info]: References / ref-limit cu / depth : 3 / on / on
x265 [info]: AQ: mode / str / qg-size / cu-tree : 1 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress : CRF-20.0 / 0.60
x265 [info]: tools: rd=3 psy-rd=2.00 rskip signhide tmvp strong-intra-smoothing
x265 [info]: tools: lslices=6 deblock sao
x265 [info]: frame I: 3, Avg QP:19.68 kb/s: 32315.52
x265 [info]: frame P: 148, Avg QP:21.03 kb/s: 12782.31
x265 [info]: frame B: 449, Avg QP:26.54 kb/s: 1167.18
x265 [info]: Weighted P-Frames: Y:0.0% UV:0.0%
x265 [info]: consecutive B-frames: 0.7% 0.7% 0.7% 96.7% 1.3%
encoded 600 frames in 113.81s (5.27 fps), 4187.99 kb/s, Avg QP:25.15
y4m [info]: 1920x1080 fps 30/1 i420p8 frames 0 - 599 of 600
raw [info]: output file: w2.hevc
x265 [info]: HEVC encoder version 2.9+16-c829b5b75a9f
x265 [info]: build info [Windows][GCC 9.0.0][64 bit] 10bit
x265 [info]: using cpu capabilities: none!
x265 [info]: Main 10 profile, Level-4 (Main tier)
x265 [info]: Thread pool created using 12 threads
x265 [info]: Slices : 1
x265 [info]: frame threads / pool features : 3 / wpp(17 rows)
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge : hex / 57 / 2 / 2
x265 [info]: Keyframe min / max / scenecut / bias: 25 / 250 / 40 / 5.00
x265 [info]: Lookahead / bframes / badapt : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb : 1 / 1 / 0
x265 [info]: References / ref-limit cu / depth : 3 / on / on
x265 [info]: AQ: mode / str / qg-size / cu-tree : 1 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress : CRF-20.0 / 0.60
x265 [info]: tools: rd=3 psy-rd=2.00 rskip signhide tmvp strong-intra-smoothing
x265 [info]: tools: lslices=6 deblock sao
x265 [info]: frame I: 3, Avg QP:39.68 kb/s: 13494.72
x265 [info]: frame P: 148, Avg QP:19.37 kb/s: 18426.52
x265 [info]: frame B: 449, Avg QP:51.00 kb/s: 77.51
x265 [info]: Weighted P-Frames: Y:0.0% UV:0.0%
x265 [info]: consecutive B-frames: 0.7% 0.7% 0.7% 96.7% 1.3%
encoded 600 frames in 103.13s (5.82 fps), 4670.69 kb/s, Avg QP:43.14
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Subject: [Bug fortran/88467] Silently accepts wrong array constructor
Date: Sun, 16 Dec 2018 17:20:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
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Target Milestone|--- |8.3
--- Comment #8 from kargl at gcc dot gnu.org ---
Fixed on trunk and branch-8. pr88116*f90 testcases
fail when patch applied to branch-7. Closing.
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Subject: [Bug fortran/88116] [8/9 Regression] ICE in gfc_convert_constant(): Unexpected type
Date: Sun, 16 Dec 2018 17:21:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #10 from kargl at gcc dot gnu.org ---
Fixed on trunk and branch-8. pr88116*f90 testcases
fail when patch applied to branch-7. Closing.
>From gcc-bugs-return-626069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 17:50:01 2018
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Subject: [Bug fortran/85544] [7/8/9 Regression] ICE in gfc_conv_scalarized_array_ref, at fortran/trans-array.c:3385
Date: Sun, 16 Dec 2018 17:50:00 -0000
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--- Comment #7 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
The problem with the patch in comment #6 is that it pessimizes code
like
b = (-1)**a
So, some more thinking required...
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Subject: [Bug fortran/80477] [OOP] Polymorphic function result generates memory leak
Date: Sun, 16 Dec 2018 19:06:00 -0000
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zed.three at gmail dot com changed:
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--- Comment #26 from zed.three at gmail dot com ---
Thank you for looking at the finalisation stuff, Paul, it's really appreciated!
It wasn't clear to me from the patch notes if you expect the following to be
fixed:
subroutine assign_a_type(lhs, rhs)
class(a_type_t), intent(inout) :: lhs
class(a_type_t), intent(in) :: rhs
lhs%x = rhs%x
end subroutine assign_a_type
or
class(a_type_t), allocatable :: c
c = add_a_type(a, b)
These still generate memory leaks (detected using -fsanitize=address)
I'm using trunk (r267184, git bf96f3)
I've been trying to dig into the code myself, mostly as a learning exercise. Am
I right in thinking that gfc_conv_procedure_call handles the whole statement?
i.e. that finalisation both of the lhs and function result are (or should be)
done here?
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Subject: [Bug target/88522] New: Error: operand size mismatch for `vpgatherqq'
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Bug ID: 88522
Summary: Error: operand size mismatch for `vpgatherqq'
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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CC: ubizjak at gmail dot com
Target Milestone: ---
Target: i386,x86-64
With binutils 2.32, I got
[hjl@gnu-skx-1 gcc]$
/export/users/hjl/build/gnu/tools-build/gcc-32bit/build-i686-linux/gcc/xgcc
-B/export/users/hjl/build/gnu/tools-build/gcc-32bit/build-i686-linux/gcc/
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -Ofast -mavx512vl -masm=intel -c -o
avx512vl-pr79299-2.o
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/avx512vl-pr79299-2.c
-m32
/tmp/ccptGe0Q.s: Assembler messages:
/tmp/ccptGe0Q.s:18: Error: operand size mismatch for `vgatherdps'
/tmp/ccptGe0Q.s:43: Error: operand size mismatch for `vgatherdps'
/tmp/ccptGe0Q.s:67: Error: operand size mismatch for `vgatherdpd'
/tmp/ccptGe0Q.s:92: Error: operand size mismatch for `vgatherdpd'
/tmp/ccptGe0Q.s:116: Error: operand size mismatch for `vgatherqps'
/tmp/ccptGe0Q.s:141: Error: operand size mismatch for `vgatherqps'
/tmp/ccptGe0Q.s:165: Error: operand size mismatch for `vgatherqpd'
/tmp/ccptGe0Q.s:190: Error: operand size mismatch for `vgatherqpd'
/tmp/ccptGe0Q.s:213: Error: operand size mismatch for `vpgatherdd'
/tmp/ccptGe0Q.s:238: Error: operand size mismatch for `vpgatherdd'
/tmp/ccptGe0Q.s:262: Error: operand size mismatch for `vpgatherdq'
/tmp/ccptGe0Q.s:287: Error: operand size mismatch for `vpgatherdq'
/tmp/ccptGe0Q.s:311: Error: operand size mismatch for `vpgatherqd'
/tmp/ccptGe0Q.s:336: Error: operand size mismatch for `vpgatherqd'
/tmp/ccptGe0Q.s:360: Error: operand size mismatch for `vpgatherqq'
/tmp/ccptGe0Q.s:385: Error: operand size mismatch for `vpgatherqq'
/tmp/ccptGe0Q.s:410: Error: operand size mismatch for `vgatherdps'
/tmp/ccptGe0Q.s:429: Error: operand size mismatch for `vgatherdps'
/tmp/ccptGe0Q.s:451: Error: operand size mismatch for `vgatherdpd'
/tmp/ccptGe0Q.s:470: Error: operand size mismatch for `vgatherdpd'
/tmp/ccptGe0Q.s:492: Error: operand size mismatch for `vgatherqps'
/tmp/ccptGe0Q.s:512: Error: operand size mismatch for `vgatherqps'
/tmp/ccptGe0Q.s:534: Error: operand size mismatch for `vgatherqpd'
/tmp/ccptGe0Q.s:553: Error: operand size mismatch for `vgatherqpd'
/tmp/ccptGe0Q.s:575: Error: operand size mismatch for `vpgatherdd'
/tmp/ccptGe0Q.s:594: Error: operand size mismatch for `vpgatherdd'
/tmp/ccptGe0Q.s:616: Error: operand size mismatch for `vpgatherdq'
/tmp/ccptGe0Q.s:635: Error: operand size mismatch for `vpgatherdq'
/tmp/ccptGe0Q.s:657: Error: operand size mismatch for `vpgatherqd'
/tmp/ccptGe0Q.s:677: Error: operand size mismatch for `vpgatherqd'
/tmp/ccptGe0Q.s:699: Error: operand size mismatch for `vpgatherqq'
/tmp/ccptGe0Q.s:718: Error: operand size mismatch for `vpgatherqq'
/tmp/ccptGe0Q.s:739: Error: operand size mismatch for `vgatherdps'
/tmp/ccptGe0Q.s:756: Error: operand size mismatch for `vgatherdps'
/tmp/ccptGe0Q.s:776: Error: operand size mismatch for `vgatherdpd'
/tmp/ccptGe0Q.s:793: Error: operand size mismatch for `vgatherdpd'
/tmp/ccptGe0Q.s:813: Error: operand size mismatch for `vgatherqps'
/tmp/ccptGe0Q.s:831: Error: operand size mismatch for `vgatherqps'
/tmp/ccptGe0Q.s:851: Error: operand size mismatch for `vgatherqpd'
/tmp/ccptGe0Q.s:868: Error: operand size mismatch for `vgatherqpd'
/tmp/ccptGe0Q.s:888: Error: operand size mismatch for `vpgatherdd'
/tmp/ccptGe0Q.s:905: Error: operand size mismatch for `vpgatherdd'
/tmp/ccptGe0Q.s:925: Error: operand size mismatch for `vpgatherdq'
/tmp/ccptGe0Q.s:942: Error: operand size mismatch for `vpgatherdq'
/tmp/ccptGe0Q.s:962: Error: operand size mismatch for `vpgatherqd'
/tmp/ccptGe0Q.s:980: Error: operand size mismatch for `vpgatherqd'
/tmp/ccptGe0Q.s:1000: Error: operand size mismatch for `vpgatherqq'
/tmp/ccptGe0Q.s:1017: Error: operand size mismatch for `vpgatherqq'
[hjl@gnu-skx-1 gcc]$
We have
[hjl@gnu-skx-1 gcc]$ cat x.s
.intel_syntax noprefix
vpgatherdd xmm0{k1}, XMMWORD PTR [eax+xmm1*1]
vpgatherdd ymm0{k1}, YMMWORD PTR [eax+ymm1*1]
vpgatherdd zmm1{k1}, ZMMWORD PTR [eax+zmm0*1]
vpgatherdq xmm0{k1}, XMMWORD PTR [eax+xmm1*1]
vpgatherdq ymm0{k1}, YMMWORD PTR [eax+xmm1*1]
vpgatherdq zmm1{k1}, ZMMWORD PTR [eax+ymm0*1]
vpgatherqd xmm0{k1}, QWORD PTR [eax+xmm1*1]
vpgatherqd xmm0{k1}, XMMWORD PTR [eax+ymm1*1]
vpgatherqd ymm1{k1}, YMMWORD PTR [eax+zmm0*1]
vpgatherqd ymm2{k1}, YMMWORD PTR [edx+zmm1*1]
vpgatherqq xmm0{k1}, XMMWORD PTR [eax+xmm1*1]
vpgatherqq ymm0{k1}, YMMWORD PTR [eax+ymm1*1]
vpgatherqq zmm2{k1}, ZMMWORD PTR [edx+zmm1*1]
[hjl@gnu-skx-1 gcc]$ gcc -m32 -c x.s
x.s: Assembler messages:
x.s:2: Error: operand size mismatch for `vpgatherdd'
x.s:3: Error: operand size mismatch for `vpgatherdd'
x.s:4: Error: operand size mismatch for `vpgatherdd'
x.s:5: Error: operand size mismatch for `vpgatherdq'
x.s:6: Error: operand size mismatch for `vpgatherdq'
x.s:7: Error: operand size mismatch for `vpgatherdq'
x.s:8: Error: operand size mismatch for `vpgatherqd'
x.s:9: Error: operand size mismatch for `vpgatherqd'
x.s:10: Error: operand size mismatch for `vpgatherqd'
x.s:11: Error: operand size mismatch for `vpgatherqd'
x.s:12: Error: operand size mismatch for `vpgatherqq'
x.s:13: Error: operand size mismatch for `vpgatherqq'
x.s:14: Error: operand size mismatch for `vpgatherqq'
[hjl@gnu-skx-1 gcc]$
GCC should generate:
[hjl@gnu-skx-1 gcc]$ cat y.s
.intel_syntax noprefix
vpgatherdd xmm0{k1}, DWORD PTR [eax+xmm1*1]
vpgatherdd ymm0{k1}, DWORD PTR [eax+ymm1*1]
vpgatherdd zmm1{k1}, DWORD PTR [eax+zmm0*1]
vpgatherdq xmm0{k1}, QWORD PTR [eax+xmm1*1]
vpgatherdq ymm0{k1}, QWORD PTR [eax+xmm1*1]
vpgatherdq zmm1{k1}, QWORD PTR [eax+ymm0*1]
vpgatherqd xmm0{k1}, DWORD PTR [eax+xmm1*1]
vpgatherqd xmm0{k1}, DWORD PTR [eax+ymm1*1]
vpgatherqd ymm1{k1}, DWORD PTR [eax+zmm0*1]
vpgatherqd ymm2{k1}, DWORD PTR [edx+zmm1*1]
vpgatherqq xmm0{k1}, QWORD PTR [eax+xmm1*1]
vpgatherqq ymm0{k1}, QWORD PTR [eax+ymm1*1]
vpgatherqq zmm2{k1}, QWORD PTR [edx+zmm1*1]
[hjl@gnu-skx-1 gcc]$ gcc -c -m32 y.s
That is DWORD for 'd' suffix and QWORD for 'q' suffix.
>From gcc-bugs-return-626072-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 20:25:16 2018
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From: "sasho648 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88523] New: Allow slick and sick incomplete variably modified function return type.
Date: Sun, 16 Dec 2018 20:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88523
Bug ID: 88523
Summary: Allow slick and sick incomplete variably modified
function return type.
Product: gcc
Version: unknown
Status: UNCONFIRMED
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Component: c
Assignee: unassigned at gcc dot gnu.org
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Consider the following code:
main()
{
auto a(char a, struct t { char t[a] } t)
{
}
}
It currently ICEs and has no actual purpose but what if we use this opportunity
to introduce:
main()
{
auto struct t main(char a, struct t { char t[a] } t)
{
return t;
}
}
The above code will complete the composite type of main on each instance after
its arguments were evaluated.
>From gcc-bugs-return-626073-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 20:29:11 2018
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Subject: [Bug c/88523] Allow slick and sick variably modified function return type constructed on each instance.
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sasho648 at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Allow slick and sick |Allow slick and sick
|variably modified function |variably modified function
|return type created on |return type constructed on
|instance. |each instance.
--- Comment #1 from sasho648 at gmail dot com ---
Allow this behavior only on functions without linkage like the one above.
>From gcc-bugs-return-626074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 20:34:32 2018
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Subject: [Bug c/88523] Allow slick and sick variably modified function return type constructed on each instance.
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--- Comment #2 from sasho648 at gmail dot com ---
I'm referring to the function without linkage main. The one with linkage that
is declared at file scope has no relation at all with my proposal - I'm just
using the opportunity to introduce as few identifiers as possible.
>From gcc-bugs-return-626075-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 20:38:04 2018
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Subject: [Bug target/88524] New: PLT32 relocation is off by 4
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Bug ID: 88524
Summary: PLT32 relocation is off by 4
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Consider the following example for some -fpic -mcmodel=small compiled code.
There is an external function func() for which we store a relative reference
to the corresponding @plt stub in a 32-bit variable.
The following seems to generate correct offsets (@plt is already relative, so
we can probably specify it directly):
void func(void);
asm("a: .long func@plt");
extern int a;
int geta()
{
return a;
}
gcc -Wall -O2 -c -fpic test.c
yields
RELOCATION RECORDS FOR [.text]:
OFFSET TYPE VALUE
0000000000000000 R_X86_64_PLT32 func
0000000000000013 R_X86_64_REX_GOTPCRELX a-0x0000000000000004
However, if we change asm("a: .long func@plt") to asm("a: .long func@plt - .")
the generated code is very weird and is off by 4:
RELOCATION RECORDS FOR [.text]:
OFFSET TYPE VALUE
0000000000000000 R_X86_64_PLT32 func-0x0000000000000004
0000000000000013 R_X86_64_REX_GOTPCRELX a-0x0000000000000004
Specifically, if we generate a shared library, the generated offset to func@plt
is off by 4 in the second case.
gcc -Wall -O2 -shared -fpic test.c
the first case is correct:
00000000000004c0 <func@plt>:
...
00000000000005c0 <a>:
5c0: 00 ff
5c2: ff
5c3: ff
[5c0 + ffffff00] = 4C0
whereas the second case is off by 4:
00000000000004c0 <func@plt>:
...
00000000000005c0 <a>:
5c0: fc
5c1: fe
5c2: ff
5c3: ff
[5c0 + fffffefc] = 4BC
It is quite possible that I am missing something here (and the generated code
is correct) but just want to check if there is any potential bug in the
compiler.
>From gcc-bugs-return-626076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 20:39:17 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88523] Allow slick and sick variably modified function return type constructed on each instance.
Date: Sun, 16 Dec 2018 20:39:00 -0000
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--- Comment #3 from sasho648 at gmail dot com ---
The included phrase in the standard would read something like:
If an incomplete structure type is the composite type of a function - it's
allowed to be completed inside its prototype in which case a X function is
created which type will be evaluated on each instance after its argument values
are evaluated.
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Subject: [Bug target/88524] PLT32 relocation is off by 4
Date: Sun, 16 Dec 2018 20:54:00 -0000
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--- Comment #1 from Ruslan Nikolaev <nruslan_devel at yahoo dot com> ---
btw, I have just compared the output with clang/llvm 7.0; the generated code
seems to be correct in both cases there.
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88524] PLT32 relocation is off by 4
Date: Sun, 16 Dec 2018 21:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88524
Andreas Schwab <schwab@linux-m68k.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |MOVED
--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
If anything, this is a problem in the linker, please report to the binutils
project.
>From gcc-bugs-return-626079-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 21:57:52 2018
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From: "ibuclaw at gdcproject dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/88462] All D execution tests FAIL on Solaris/SPARC
Date: Sun, 16 Dec 2018 21:57:00 -0000
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--- Comment #12 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Johannes Pfau from comment #10)
> I guess the proper fix to the alignment problem is using
> 'https://dlang.org/phobos/std_traits.html#classInstanceAlignment' (or rather
> the druntime equivalent) instead of Mutex.alignof + the rounding / slice
> assignment fixes?
>
> Regarding the ModuleInfo problem: Although ModuleInfo does have a variable
> size, _flags ist the first field in the struct. So the whole struct instance
> has to be misaligned for some reason? Is the minfo section aligned properly?
ModuleInfo is forced an alignment of 1. It should be instead aligned to
`max(uint.sizeof, size_t.sizeof)` so that both named and variable data parts
can be read without alignment problems.
>From gcc-bugs-return-626080-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 22:39:52 2018
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From: "anders.granlund.0 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88477] Variable with type completed in initializer not allowed.
Date: Sun, 16 Dec 2018 22:39:00 -0000
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--- Comment #4 from Anders Granlund <anders.granlund.0 at gmail dot com> ---
In general the standard seems to be a bit inprecise when it talks about types
beeing complete.
The same type may be incomplete at one point in the program, but complete at
another point. The standard should always specify at what point in the program
a type needs to be complete when it requires it to be complete.
I will file a defect report about that instead.
>From gcc-bugs-return-626081-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 22:49:08 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88525] New: gcc thinks that C11 program does not declare anything but it does.
Date: Sun, 16 Dec 2018 22:49:00 -0000
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Bug ID: 88525
Summary: gcc thinks that C11 program does not declare anything
but it does.
Product: gcc
Version: 9.0
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Priority: P3
Component: c
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Consider the following C11 program (prog.c):
int main()
{
struct { enum { a } b; };
}
This program does NOT violate rule 6.7.2 in the C11 standard since the
declaration declares a member of an enum (a).
I tried to compile it with the following command line:
gcc prog.c -std=c11 -pedantic-errors
I get the following unexpected error message:
error: unnamed struct/union that defines no instances
This is wrong. The declaration does declare the enum member a and according
to the C11 standard it does not need to declare anything else.
>From gcc-bugs-return-626082-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 22:52:44 2018
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Subject: [Bug target/88524] PLT32 relocation is off by 4
Date: Sun, 16 Dec 2018 22:52:00 -0000
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Ruslan Nikolaev <nruslan_devel at yahoo dot com> changed:
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----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
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--- Comment #3 from Ruslan Nikolaev <nruslan_devel at yahoo dot com> ---
(In reply to Andreas Schwab from comment #2)
> If anything, this is a problem in the linker, please report to the binutils
> project.
Why is it binutils? The problem already appears with when running with '-c'
flag (incorrect PLT32 relocation), i.e. not linking a shared library yet. I
have just gave that example to further demonstrate the problem.
>From gcc-bugs-return-626083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 22:58:38 2018
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Subject: [Bug target/88524] PLT32 relocation is off by 4
Date: Sun, 16 Dec 2018 22:58:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Still is a binutils (assembler rather than the linker issue):
.file "t.c"
.text
#APP
a: .long func@plt - 4
#NO_APP
.globl geta
.type geta, @function
geta:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
movq a@GOTPCREL(%rip), %rax
movl (%rax), %eax
popq %rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE0:
.size geta, .-geta
.ident "GCC: (Octeon TX GCC 7 - (Build 116)) 7.3.0"
.section .note.GNU-stack,"",@progbits
What GCC outputs does not have the -4 in there.
>From gcc-bugs-return-626084-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 23:03:47 2018
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From: "anders.granlund.0 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88526] New: gcc accepts ill-formed program with sizeof (int [*])
Date: Sun, 16 Dec 2018 23:03:00 -0000
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Bug ID: 88526
Summary: gcc accepts ill-formed program with sizeof (int [*])
Product: gcc
Version: 9.0
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Priority: P3
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Consider the following C11 program (prog.c):
void f(int a[sizeof(int [*])]);
int main()
{
}
Compiling it with
gcc prog.c -std=c11 -pedantic-errors
gives no errors. The expected behaviour is that it should compile with at least
one error. This becuase the flag -pedantic-errors was used and because the
program is incorrect according to the C11 standard (taking sizeof int [*]
should not be possible since it is not a complete type).
>From gcc-bugs-return-626085-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 16 23:22:20 2018
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Subject: [Bug target/88524] PLT32 relocation is off by 4
Date: Sun, 16 Dec 2018 23:22:00 -0000
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--- Comment #5 from Ruslan Nikolaev <nruslan_devel at yahoo dot com> ---
(In reply to Andrew Pinski from comment #4)
> Still is a binutils (assembler rather than the linker issue):
> .file "t.c"
> .text
> #APP
> a: .long func@plt - 4
> #NO_APP
> .globl geta
> .type geta, @function
> geta:
> .LFB0:
> .cfi_startproc
> pushq %rbp
> .cfi_def_cfa_offset 16
> .cfi_offset 6, -16
> movq %rsp, %rbp
> .cfi_def_cfa_register 6
> movq a@GOTPCREL(%rip), %rax
> movl (%rax), %eax
> popq %rbp
> .cfi_def_cfa 7, 8
> ret
> .cfi_endproc
> .LFE0:
> .size geta, .-geta
> .ident "GCC: (Octeon TX GCC 7 - (Build 116)) 7.3.0"
> .section .note.GNU-stack,"",@progbits
>
>
> What GCC outputs does not have the -4 in there.
Ok, thanks!
>From gcc-bugs-return-626086-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 02:20:36 2018
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Subject: [Bug fortran/85314] gcc/fortran/resolve.c:9222: unreachable code ?
Date: Mon, 17 Dec 2018 02:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85314
--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Mon Dec 17 02:19:58 2018
New Revision: 267196
URL: https://gcc.gnu.org/viewcvs?rev=267196&root=gcc&view=rev
Log:
2018-12-16 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/85314
* resolve.c (resolve_transfer): Remove dead code.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
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Subject: [Bug fortran/85314] gcc/fortran/resolve.c:9222: unreachable code ?
Date: Mon, 17 Dec 2018 02:21:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|8.3 |9.0
--- Comment #5 from kargl at gcc dot gnu.org ---
Fixed. Disappointed. Closing.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88527] New: ICE: tree check: expected integer_cst, have error_mark in equal, at tree.c:1464; or tree check: expected integer_cst, have identifier_node in equal, at tree.c:1464
Date: Mon, 17 Dec 2018 03:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88527
Bug ID: 88527
Summary: ICE: tree check: expected integer_cst, have error_mark
in equal, at tree.c:1464; or tree check: expected
integer_cst, have identifier_node in equal, at
tree.c:1464
Product: gcc
Version: unknown
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Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
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Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: powerpc-*-linux-gnu
1.
gcc-9.0.0-alpha20181209 snapshot (r266934) ICEs when compiling
gcc/testsuite/gcc.dg/graphite/id-26.c w/ -O1 -floop-interchange -fopenmp
-fno-ssa-phiopt -fno-tree-loop-im -fno-tree-scev-cprop -fno-tree-vrp -g:
% powerpc-e300c3-linux-gnu-gcc-9.0.0-alpha20181216 -O1 -floop-interchange
-fopenmp -fno-ssa-phiopt -fno-tree-loop-im -fno-tree-scev-cprop -fno-tree-vrp
-g -c gcc/testsuite/gcc.dg/graphite/id-26.c
during GIMPLE pass: ivopts
gcc/testsuite/gcc.dg/graphite/id-26.c: In function 'find_sad_16x16':
gcc/testsuite/gcc.dg/graphite/id-26.c:2:5: internal compiler error: tree check:
expected integer_cst, have error_mark in equal, at tree.c:1464
2 | int find_sad_16x16(int *intra_mode)
| ^~~~~~~~~~~~~~
0x6bb2b9 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree.c:9757
0x6bc34d tree_check(tree_node const*, char const*, int, char const*, tree_code)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree.h:3413
0x6bc34d int_cst_hasher::equal(tree_node*, tree_node*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree.c:1464
0xff03ac hash_table<int_cst_hasher,
xcallocator>::find_slot_with_hash(tree_node* const&, unsigned int,
insert_option)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/hash-table.h:896
0xfdc6a1 hash_table<int_cst_hasher, xcallocator>::find_slot(tree_node* const&,
insert_option)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/hash-table.h:414
0xfdc6a1 wide_int_to_tree_1
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree.c:1596
0xfde8da force_fit_type(tree_node*, poly_int<1u,
generic_wide_int<wide_int_ref_storage<false, true> > > const&, int, bool)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree.c:1433
0xa07d26 fold_convert_const_int_from_int
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:1999
0xa07d26 fold_convert_const
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:2277
0xa1817b fold_convert_loc(unsigned int, tree_node*, tree_node*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:2414
0xa2533e extract_muldiv_1
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:6300
0xa26570 extract_muldiv
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:6215
0xa100d9 fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:10072
0xa1466a fold_build2_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:12343
0x9ccd3e get_inner_reference(tree_node*, poly_int_pod<1u, long>*,
poly_int_pod<1u, long>*, tree_node**, machine_mode*, int*, int*, int*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/expr.c:7249
0x8886b8 get_object_alignment_2
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/builtins.c:254
0x888c5b get_object_alignment(tree_node*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/builtins.c:404
0xe76a4b rewrite_use_address
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-loop-ivopts.c:7140
0xe76a4b rewrite_groups
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-loop-ivopts.c:7237
0xe76a4b tree_ssa_iv_optimize_loop
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-loop-ivopts.c:7596
2.
Replacing -O1 w/ -Os yields the following:
% powerpc-e300c3-linux-gnu-gcc-9.0.0-alpha20181216 -Os -floop-interchange
-fopenmp -fno-ssa-phiopt -fno-tree-loop-im -fno-tree-scev-cprop -fno-tree-vrp
-g -c gcc/testsuite/gcc.dg/graphite/id-26.c
during GIMPLE pass: ivopts
gcc/testsuite/gcc.dg/graphite/id-26.c: In function 'find_sad_16x16':
gcc/testsuite/gcc.dg/graphite/id-26.c:2:5: internal compiler error: tree check:
expected integer_cst, have identifier_node in equal, at tree.c:1464
2 | int find_sad_16x16(int *intra_mode)
| ^~~~~~~~~~~~~~
0x6bb2b9 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree.c:9757
0x6bc34d tree_check(tree_node const*, char const*, int, char const*, tree_code)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree.h:3413
0x6bc34d int_cst_hasher::equal(tree_node*, tree_node*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree.c:1464
0xff03ac hash_table<int_cst_hasher,
xcallocator>::find_slot_with_hash(tree_node* const&, unsigned int,
insert_option)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/hash-table.h:896
0xfdc6a1 hash_table<int_cst_hasher, xcallocator>::find_slot(tree_node* const&,
insert_option)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/hash-table.h:414
0xfdc6a1 wide_int_to_tree_1
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree.c:1596
0xfde8da force_fit_type(tree_node*, poly_int<1u,
generic_wide_int<wide_int_ref_storage<false, true> > > const&, int, bool)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree.c:1433
0xa07d26 fold_convert_const_int_from_int
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:1999
0xa07d26 fold_convert_const
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:2277
0xa1817b fold_convert_loc(unsigned int, tree_node*, tree_node*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:2414
0xa2533e extract_muldiv_1
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:6300
0xa26570 extract_muldiv
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:6215
0xa100d9 fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:10072
0xa1466a fold_build2_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/fold-const.c:12343
0x9ccd3e get_inner_reference(tree_node*, poly_int_pod<1u, long>*,
poly_int_pod<1u, long>*, tree_node**, machine_mode*, int*, int*, int*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/expr.c:7249
0x8886b8 get_object_alignment_2
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/builtins.c:254
0x888c5b get_object_alignment(tree_node*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/builtins.c:404
0xe76a4b rewrite_use_address
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-loop-ivopts.c:7140
0xe76a4b rewrite_groups
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-loop-ivopts.c:7237
0xe76a4b tree_ssa_iv_optimize_loop
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-loop-ivopts.c:7596
>From gcc-bugs-return-626089-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 03:46:56 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/78394] False positives of maybe-uninitialized with -Og
Date: Mon, 17 Dec 2018 03:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78394
--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #7)
> -O0 has none of the analysis necessary and I believe you get no warnings at
> all.
>
> A minimum of -Og is needed, but -Og is inherently going to give many false
> positives.
So is it worth trying to fix this then?
>From gcc-bugs-return-626090-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 03:55:22 2018
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Subject: [Bug c++/84897] Better handling of unqualified "string"
Date: Mon, 17 Dec 2018 03:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84897
Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=88501
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
semi-related: bug 88501
(ok not really THAT related, but it still made me think of it)
>From gcc-bugs-return-626091-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 04:02:33 2018
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Subject: [Bug web/86315] Bugzilla: add "cc count" and "duplicate count" columns
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gerald at pfeifer dot com
See Also| |https://bugzilla.mozilla.or
| |g/show_bug.cgi?id=62718
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #5)
> Is there please any update?
Is there someone else who could do this besides LpSolit? Gerald maybe? He takes
care of most other web stuff, and Bugzilla is part of the website...
>From gcc-bugs-return-626092-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 05:43:13 2018
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From: "proski at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88528] New: Regression in gcc 7.4
Date: Mon, 17 Dec 2018 05:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88528
Bug ID: 88528
Summary: Regression in gcc 7.4
Product: gcc
Version: 7.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: proski at gnu dot org
Target Milestone: ---
gcc 7.4.0 fails to compile some code that could be compiled with earlier
version of gcc 7.x. I don't see that issue with gcc 4.9.4, 5.5.0, 6.5.0 and
8.1.0. The issue still exists with the current gcc-7-branch (git revision
c51441f7f92fe9f4a0a452c1f8d283751ad463c5, timestamp 20181217).
The code:
template <int size>
struct A
{
const bool is_valid;
operator bool() const
{
return is_valid;
}
};
template <class T>
bool check_a()
{
const A<0> a {};
const bool a_valid {a};
return a_valid;
}
The output with the current gcc from the gcc-7-branch:
$ /opt/gcc/bin/gcc -std=c++14 -c test.cpp
test.cpp: In function ‘bool check_a()’:
test.cpp:15:24: internal compiler error: unexpected expression ‘(bool)a’ of
kind implicit_conv_expr
const bool a_valid {a};
^
0x6e2a5d cxx_eval_constant_expression
/home/roskinp/src/gcc/gcc/cp/constexpr.c:4697
0x6e4454 cxx_eval_outermost_constant_expr
/home/roskinp/src/gcc/gcc/cp/constexpr.c:4755
0x6e6391 maybe_constant_init(tree_node*, tree_node*)
/home/roskinp/src/gcc/gcc/cp/constexpr.c:5082
0x603c2f store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
/home/roskinp/src/gcc/gcc/cp/typeck2.c:832
0x5c105d check_initializer
/home/roskinp/src/gcc/gcc/cp/decl.c:6377
0x5c5691 cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
/home/roskinp/src/gcc/gcc/cp/decl.c:6953
0x654d7f cp_parser_init_declarator
/home/roskinp/src/gcc/gcc/cp/parser.c:19468
0x6555cd cp_parser_simple_declaration
/home/roskinp/src/gcc/gcc/cp/parser.c:12844
0x656295 cp_parser_block_declaration
/home/roskinp/src/gcc/gcc/cp/parser.c:12669
0x656bb9 cp_parser_declaration_statement
/home/roskinp/src/gcc/gcc/cp/parser.c:12279
0x638247 cp_parser_statement
/home/roskinp/src/gcc/gcc/cp/parser.c:10754
0x63900d cp_parser_statement_seq_opt
/home/roskinp/src/gcc/gcc/cp/parser.c:11098
0x6390b7 cp_parser_compound_statement
/home/roskinp/src/gcc/gcc/cp/parser.c:11052
0x649f00 cp_parser_function_body
/home/roskinp/src/gcc/gcc/cp/parser.c:21521
0x649f00 cp_parser_ctor_initializer_opt_and_function_body
/home/roskinp/src/gcc/gcc/cp/parser.c:21559
0x6508f0 cp_parser_function_definition_after_declarator
/home/roskinp/src/gcc/gcc/cp/parser.c:26353
0x6551dd cp_parser_function_definition_from_specifiers_and_declarator
/home/roskinp/src/gcc/gcc/cp/parser.c:26265
0x6551dd cp_parser_init_declarator
/home/roskinp/src/gcc/gcc/cp/parser.c:19247
0x63430a cp_parser_single_declaration
/home/roskinp/src/gcc/gcc/cp/parser.c:26811
0x6501ec cp_parser_template_declaration_after_parameters
/home/roskinp/src/gcc/gcc/cp/parser.c:26415
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-626093-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 07:01:19 2018
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Subject: [Bug c++/88528] ICE with templated operator bool() in gcc 7
Date: Mon, 17 Dec 2018 07:01:00 -0000
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Pavel Roskin <proski at gnu dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Regression in gcc 7.4 |ICE with templated operator
| |bool() in gcc 7
--- Comment #1 from Pavel Roskin <proski at gnu dot org> ---
I turns out I was wrong about the previous version of gcc. I've just tested gcc
7.1, 7.2 and 7.3 compiled from the source. They all are affected.
>From gcc-bugs-return-626094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 07:31:27 2018
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Subject: [Bug c++/88521] gcc 9.0 from r266355 miscompile x265 for mingw-w64 target
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |lokeshjanghel91 at gmail dot com
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
CC author of the patch.
>From gcc-bugs-return-626095-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 08:04:03 2018
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/88487] union prevents autovectorization
Date: Mon, 17 Dec 2018 08:04:00 -0000
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--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 14 Dec 2018, bugzilla@poradnik-webmastera.com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88487
>
> --- Comment #4 from Daniel Fruzynski <bugzilla@poradnik-webmastera.com> ---
> OK, I see. Is there any workaround for this?
Only not using a union ...
> I tried to assign pointer to local
> variable directly and with intermediate casting via void*, but it did not help.
> Casting S1* to S2* also does not work.
Yes, that doesn't work by design.
>From gcc-bugs-return-626096-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 08:06:26 2018
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/88490] Missed autovectorization when indices are different
Date: Mon, 17 Dec 2018 08:06:00 -0000
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 14 Dec 2018, joseph at codesourcery dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88490
>
> --- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
> On Fri, 14 Dec 2018, rguenther at suse dot de wrote:
>
> > Note I do not think the C standard is sufficiently clear with regarding
> > to restrict qualified pointers loaded from memory.
>
> I think this is where "Every access that modifies X shall be considered
> also to modify P, for the purposes of this subclause." comes in. (See
> what I said at <https://gcc.gnu.org/ml/gcc-bugs/2005-01/msg03394.html>.)
> Modifying s->d[n][0] is considered to modify s->d[n], and so considered to
> modify s->d, and so considered to modify s. (It's still perfectly valid
> to have n == k; what's not valid is aliasing between objects accessed via
> s->d[0] and s->d[1], for example.)
OK, thanks for clarifying. I think we are fine implementation-wise
and I have a hard time thinking of a way to improve here given we
have to compute sth conservatively correct.
>From gcc-bugs-return-626097-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 08:16:14 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/88497] Improve Accumulation in Auto-Vectorized Code
Date: Mon, 17 Dec 2018 08:16:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |powerpc*
Component|middle-end |target
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think it is reassoc doing it "wrong" based on the targets reassoc-width?
Because the vectorizer generates exactly the code you are proposing.
Though you didn't even provide a fully compilable testcase. I guessed N to
be 16 here and your ideal examples use 'accumulator' which I assume to be 0.0.
Your x86 code-gen examples are also from GCC 8 I assume (plus some -march/tune
flag you didn't expose given it uses haddpd)
>From gcc-bugs-return-626098-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 08:35:52 2018
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Subject: [Bug tree-optimization/78394] False positives of maybe-uninitialized with -Og
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78394
--- Comment #9 from Allan Jensen <linux at carewolf dot com> ---
I see two other level effort ways to possibly fix the issue. Disable the
warning like for -O0 as it is buggy, or if we believe it still has some value
in -Og even with the false positivies, just removing it from -Wall or -Wextra,
so it at least doesn't get enabled unless explicitly asked for.
>From gcc-bugs-return-626099-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 08:53:06 2018
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Subject: [Bug c++/88529] New: G++ clears the return register on x86_64 when returning an empty class
Date: Mon, 17 Dec 2018 08:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88529
Bug ID: 88529
Summary: G++ clears the return register on x86_64 when
returning an empty class
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: rohan at rohanlean dot de
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Target: x86_64
The following code causes G++ to emit an "xorl %eax, %eax" on x86_64. I believe
the Itanium ABI does not require it, so this is a missed optimisation.
class A{};
A f() { return {}; }
>From gcc-bugs-return-626100-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 09:10:20 2018
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Subject: [Bug tree-optimization/78394] False positives of maybe-uninitialized with -Og
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--- Comment #10 from Marc Glisse <glisse at gcc dot gnu.org> ---
IMO -Wmaybe-uninitialized should not be enabled by -Wall, whatever the
optimization level (even at -O3), it has too many false positives that are all
but impossible to work around (thus violating the definition of -Wall), -Wextra
is good enough for it. We could keep -Wuninitialized though (it requires
changing the dependency between these 2 warnings).
It is possible that even -Wextra should require at least -O1 (considering -Og
as -O0.5) to enable it...
>From gcc-bugs-return-626101-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 09:14:48 2018
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Subject: [Bug c++/88517] Virtual-base class class constructor with for-loop with initializer list referencing local variable not executed
Date: Mon, 17 Dec 2018 09:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. What happens is that
const int * __for_begin;
<<cleanup_point <<< Unknown tree: expr_stmt
(void) (__for_begin = std::initializer_list<int>::begin ((struct
initializer_list *) __for_range)) >>>>>;
const int * __for_end;
<<cleanup_point <<< Unknown tree: expr_stmt
(void) (__for_end = std::initializer_list<int>::end ((struct initializer_list
*) __for_range)) >>>>>;
while (1)
{
if (__for_begin == __for_end) goto <D.35468>;
^^^^ this is true initially
int i = (int) *__for_begin;
<<cleanup_point <<< Unknown tree: expr_stmt
(void) std::basic_ostream<char>::operator<< ((struct basic_ostream *)
std::basic_ostream<char>::operator<< (&cout, i), endl) >>>>>;
<<cleanup_point (void) ++__for_begin>>;
}
but somehow not when cut&pasting that directly into main().
>From gcc-bugs-return-626103-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 09:16:56 2018
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Subject: [Bug tree-optimization/88519] [9 Regression] internal compiler error: in expand_widen_pattern_expr, at optabs.c:278
Date: Mon, 17 Dec 2018 09:16:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
Component|rtl-optimization |tree-optimization
Target Milestone|--- |9.0
Summary|internal compiler error: in |[9 Regression] internal
|expand_widen_pattern_expr, |compiler error: in
|at optabs.c:278 |expand_widen_pattern_expr,
| |at optabs.c:278
>From gcc-bugs-return-626102-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 09:16:32 2018
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Subject: [Bug middle-end/88518] Function call defeats -Wuninitialized
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Severity|normal |enhancement
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Not so easy.
>From gcc-bugs-return-626104-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 09:20:23 2018
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Subject: [Bug c++/88521] gcc 9.0 from r266355 miscompile x265 for mingw-w64 target
Date: Mon, 17 Dec 2018 09:20:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Since the patch changes the ABI can it be you have library dependences with the
old ABI around?
>From gcc-bugs-return-626105-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 09:23:53 2018
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Subject: [Bug c++/88528] [7 Regression] ICE with templated operator bool() in gcc 7
Date: Mon, 17 Dec 2018 09:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |6.5.0, 8.1.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2018-12-17
Ever confirmed|0 |1
Summary|ICE with templated operator |[7 Regression] ICE with
|bool() in gcc 7 |templated operator bool()
| |in gcc 7
Target Milestone|--- |7.5
Known to fail| |7.1.0, 7.4.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-626106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 09:52:49 2018
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From: "moritz.kreutzer at siemens dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"
Date: Mon, 17 Dec 2018 09:52:00 -0000
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--- Comment #16 from Moritz Kreutzer <moritz.kreutzer at siemens dot com> ---
I can confirm the fix from my side.
Thanks again!
>From gcc-bugs-return-626107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 09:57:56 2018
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Subject: [Bug middle-end/88175] Showing header file instead of source code line for uninitialized variable
Date: Mon, 17 Dec 2018 09:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88175
--- Comment #14 from Jonny Grant <jg at jguk dot org> ---
Wondering, if there is an implicitly created copy-constructor, can the warning
clarify that? Perhaps there is some attribute or flag set so later code can
know it was implicitly created?
eg output could be:
$ g++ -O2 -Werror=uninitialized -o header header.cpp
header.cpp: In function ‘void test(info_t)’:
header.cpp:10:10: error: ‘copy.info::registered’ is used uninitialized in
implicitly created copy-constructor function for struct info::info()
[-Werror=uninitialized]
temp = copy;
~~~~~^~~~~~
cc1plus: some warnings being treated as errors
>From gcc-bugs-return-626108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 10:01:58 2018
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From: "harald at gigawatt dot nl" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/81665] Please introduce flags attribute for enums which will mimic one from C#
Date: Mon, 17 Dec 2018 10:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81665
Harald van Dijk <harald at gigawatt dot nl> changed:
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----------------------------------------------------------------------------
CC| |harald at gigawatt dot nl
--- Comment #5 from Harald van Dijk <harald at gigawatt dot nl> ---
> It should work in similar way as a [Flags] attribute in C#.
Bitwise operations are allowed on enum types in C# and produce values of that
type regardless of attributes. The [Flags] attribute's effect is pretty much
limited to changing how converting enum values to strings behaves. This is not
at all what you're asking __attribute__((flags)) to do. I suggest editing the
title to not recommend mimicking C#'s attribute.
One thing that I would like to ask to consider is the debugging experience.
Please make sure that no function body is ever emitted (which implies that just
like with standard built-in operators, it's not possible to take the operator's
address). For a custom overloaded operator, it will be, and it's even possible
to break on it or step through it when debugging, but this probably isn't
useful here. Please also make sure that enough information is available to the
debugger so treat the type the same way as the compiler: in gdb, given the code
enum E { a = 1, b = 2, c = 4 };
p b|c will produce $n = 6, whereas p (E)(b|c) will produce $n = (b | c). If the
flags attribute is added, p b|c should probably also produce $n = (b | c). This
is something you cannot and perhaps should not get with custom overloaded
operators (you can write p operator|(b,c) instead), but should be safe and
reasonable here.
>From gcc-bugs-return-626109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 10:51:33 2018
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Subject: [Bug rtl-optimization/88253] Inlining of function incorrectly deletes volatile register access when using XOR in avr-gcc
Date: Mon, 17 Dec 2018 10:51:00 -0000
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--- Comment #5 from Senthil Kumar Selvaraj <saaadhu at gcc dot gnu.org> ---
Author: saaadhu
Date: Mon Dec 17 10:50:54 2018
New Revision: 267198
URL: https://gcc.gnu.org/viewcvs?rev=267198&root=gcc&view=rev
Log:
Fix PR 88253
gcc/ChangeLog:
PR rtl-optimization/88253
* combine.c (combine_simplify_rtx): Test for side-effects before
substituting by zero.
gcc/testsuite/ChangeLog:
PR rtl-optimization/88253
* gcc.target/avr/pr88253.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/avr/pr88253.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/88530] New: [8/9 Regression] AArch64 Unsupported options passed to assemblers when it doesn't need to.
Date: Mon, 17 Dec 2018 11:43:00 -0000
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Bug ID: 88530
Summary: [8/9 Regression] AArch64 Unsupported options passed to
assemblers when it doesn't need to.
Product: gcc
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Target: aarch64*-*-*
With GCC 8 we retro-actively split some command-line options and took care to
not pass them along to assemblers if the user didn't specify them.
Unfortunately -mtune=nativeand -mcpu=native will enable all feature bits
supported. We then pass these on to the assembler even though we don't need to
since the old option which is a grouping of the new options can be used
instead.
This breaks the compiler's support for older assemblers when `native` is used,
requiring a relatively new binutils even for older compilers.
>From gcc-bugs-return-626111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 11:46:45 2018
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Subject: [Bug target/88530] [8/9 Regression] AArch64 Unsupported options passed to assemblers when it doesn't need to.
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Tamar Christina <tnfchris at gcc dot gnu.org> changed:
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88501] Improve suggested alternative to be closer to typo
Date: Mon, 17 Dec 2018 12:06:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonny Grant from comment #3)
> I wonder, for typos if a simple byte compare would be enough? Vary each char
> by 1 letter, or length. This starts to get complicated I know..
The matching code is already significantly smarter than that. The problem is
that "string" is not in the set of candidates being matched against, so a
simple byte compare isn't going to help find it any better than the current
code.
> "st!ing"
! is a single byte in UTF-8
>From gcc-bugs-return-626114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 12:08:44 2018
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Subject: [Bug c++/88504] Inconsistent error message notes when using forward-declared type as value
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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Subject: [Bug rtl-optimization/88253] Inlining of function incorrectly deletes volatile register access when using XOR in avr-gcc
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--- Comment #6 from Senthil Kumar Selvaraj <saaadhu at gcc dot gnu.org> ---
Author: saaadhu
Date: Mon Dec 17 12:07:26 2018
New Revision: 267199
URL: https://gcc.gnu.org/viewcvs?rev=267199&root=gcc&view=rev
Log:
2018-12-17 Senthil Kumar Selvaraj <senthilkumar.selvaraj@microchip.com>
Backport from trunk
2018-12-17 Senthil Kumar Selvaraj
<senthilkumar.selvaraj@microchip.com>
PR rtl-optimization/88253
* combine.c (combine_simplify_rtx): Test for side-effects before
substituting by zero.
2018-12-17 Senthil Kumar Selvaraj <senthilkumar.selvaraj@microchip.com>
Backport from trunk
2018-12-17 Senthil Kumar Selvaraj
<senthilkumar.selvaraj@microchip.com>
PR rtl-optimization/88253
* gcc.target/avr/pr88253.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/avr/pr88253.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/combine.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/88531] New: Index data types when targeting AVX-512 vectorization with gather/scatter
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88531
Bug ID: 88531
Summary: Index data types when targeting AVX-512 vectorization
with gather/scatter
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: florian.schornbaum at siemens dot com
Target Milestone: ---
Hi,
I realized that GCC fails to vectorize simple loops if there are indirect loads
(or stores) and the index used for the indirect access doesn't match a very
small subset of possible integer data types. I'm targeting AVX-512. This is the
MWE (only an indirect load, but a direct store):
==============================
#include <cstdint>
using loop_t = uint32_t;
using idx_t = uint32_t;
void loop(double * const __restrict__ dst,
double const * const __restrict__ src,
idx_t const * const __restrict__ idx,
loop_t const begin,
loop_t const end)
{
for (loop_t i = begin; i < end; ++i)
{
dst[i] = 42.0 * src[idx[i]];
}
}
==============================
See: https://godbolt.org/z/Ps-sOv
This only vectorizes if idx_t is int32_t, int64_t, or uint64_t.
My suspicion is this goes back to the gather/scatter instructions of AVX-512
that come in two flavors: with 32 and 64 bit signed integers for the indices.
Unsigned 64 bit probably works (on a 64 bit architecture) because it looks like
it's just treated as a signed 64 bit value, which probably is due to (from the
documentation):
"... The scaled index may require more bits to represent than the address bits
used by the processor (e.g., in 32-bit mode, if the scale is greater than one).
In this case, the most significant bits beyond the number of address bits are
ignored. ..."
Unfortunately, for int16_t, uint16_t, and uint32_t, this does not vectorize.
Although the 32 bit version of gather/scatter could be used -- with proper zero
padding -- for int16_t and uint16_t. Likewise, the 64 bit version could be used
with indices of type uint32_t.
Although the code example only uses idx[i] for loading, it appears to be the
exact same issue when using idx[i] for storing (meaning: when scatter would be
required).
Are there any plans to get this working?
Or did I maybe miss something and this should already work?
Many thanks in advance
Florian
>From gcc-bugs-return-626116-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 12:23:44 2018
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Subject: [Bug tree-optimization/88531] Index data types when targeting AVX-512 vectorization with gather/scatter
Date: Mon, 17 Dec 2018 12:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-17
CC| |jakub at gcc dot gnu.org
Component|c++ |tree-optimization
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
There were recent updates to scatter/gather support for AVX512 and GCC 9. I'm
not sure that generic widening is done though.
>From gcc-bugs-return-626117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 12:24:43 2018
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Subject: [Bug target/88530] [8/9 Regression] AArch64 Unsupported options passed to assemblers when it doesn't need to.
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ktkachov at gcc dot gnu.org changed:
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--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed.
>From gcc-bugs-return-626118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 12:32:31 2018
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Subject: [Bug tree-optimization/88531] Index data types when targeting AVX-512 vectorization with gather/scatter
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think I haven't changed anything on this. AVX2 and AVX512{F,VL} gathers and
scatters only do signed widening themselves. Thus, if the index is uint32_t
and -m64, the only hope would be to perform vectorization conversion of it to
uint64_t/int64_t vector first and then use gathers or scatters with V*DImode
indexes.
>From gcc-bugs-return-626119-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 12:41:55 2018
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Subject: [Bug c++/78986] [7/8/9 Regression] template inner classes are not affected by access specifiers
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed by the patch for PR 86823
*** This bug has been marked as a duplicate of bug 86823 ***
>From gcc-bugs-return-626120-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 12:41:56 2018
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 78986 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-626121-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 12:41:57 2018
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Subject: [Bug c++/59002] [meta-bug] Access checking in templates
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Bug 59002 depends on bug 78986, which changed state.
Bug 78986 Summary: [7/8/9 Regression] template inner classes are not affected by access specifiers
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78986
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>From gcc-bugs-return-626122-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 12:46:16 2018
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Subject: [Bug c++/88507] utf8 not displayed
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonny Grant from comment #0)
> Hello
>
> This is an typo in the word "string", just reporting as perhaps it could
> show £ correctly, as it does on line 10 error.
But then you couldn't have two separate caret locations pointing to the two
invalid bytes, because it would only occupy a single column. You also assume
the terminal is capable of showing UTF-8 characters.
> Perhaps could also show the
> stray bytes in hex as well? ie "0xF3C2"
I don't see why that would that be an improvement.
>From gcc-bugs-return-626123-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 12:52:53 2018
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Subject: [Bug c++/88521] gcc 9.0 from r266355 miscompile x265 for mingw-w64 target
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Umesh Kalappa <umesh.kalappa0 at gmail dot com> changed:
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--- Comment #3 from Umesh Kalappa <umesh.kalappa0 at gmail dot com> ---
mateuszb,
Please can you provide us the sample file to investigate more on this .
>From gcc-bugs-return-626124-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 12:53:32 2018
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Subject: [Bug c++/88521] gcc 9.0 from r266355 miscompile x265 for mingw-w64 target
Date: Mon, 17 Dec 2018 12:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88521
--- Comment #4 from Umesh Kalappa <umesh.kalappa0 at gmail dot com> ---
mateuszb,
Please can you provide us the sample file to investigate more on this .
>From gcc-bugs-return-626125-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 12:58:31 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88512] Too much STL in error output
Date: Mon, 17 Dec 2018 12:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88512
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonny Grant from comment #3)
> Hi Marc
>
> I agree to useful to have the option to keep on for regular code.
> Perhaps a way just to turn off all expansive output for STL's std namespace?
But what about cases where you call a std::lib function template that accepts
any arguments, which forwards them to some other std::lib function that gives
an error because the args are invalid. If you remove all the context that's in
the std::lib then you remove the relevant context.
> The easiest would be to remove cxx11 namespace from the messages
> "std::__cxx11::basic_string" etc, so at least that doesn't shwo.
>
>
> Updated output I had executed from STL with clear candidate suggestions:
>
> $ g++ -Wall -o stl_string stl_string.cpp
> stl_string.cpp: In function ‘int main()’:
> stl_string.cpp:7:27: error: no matching function for call to
> ‘std::string::erase(std::size_t&, std::string::iterator)’
> str.erase(s, str.end());
> ^
> candidates are:
> std::string& std::string::erase(size_type index = 0, size_type count =
> npos)
> std::string::iterator std::string::erase(const_iterator first,
> const_iterator last)
> std::string::iterator std::string::erase(const_iterator position)
You've removed all the information that says *why* it didn't match (e.g. no
conversion from size_t to const_iterator). That's useful.
You don't improve the compiler's diagnostics by optimising for a single example
where the verbose info happens to be unnecessary. That info is useful in other
cases.
>From gcc-bugs-return-626126-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 17 13:24:54 2018
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